thumbs: a GPU-access run already in flight refuses a second (409)

The sweep's battery hit the route three times; the second and third runs only collided with the first's restart timer. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>
PLAN.md: the whole-console sweep
2026-10-13 18:00:39 -07:00 · 2026-10-13 17:56:16 -07:00 · 2026-10-13 17:52:18 -07:00 · 2026-10-11 20:32:34 -07:00 · 2026-10-11 20:31:10 -07:00 · 2026-10-11 17:46:35 -07:00
97 changed files with 19728 additions and 494 deletions
@@ -21,7 +21,7 @@ stub tab or a roadmap item.
 | Guest logins | A **guest** is an account like any other, with `guest: true` and an expiry: `login`, sessions and prefs need no special case, and **it may do everything an account may do**. The expiry is the whole feature — checked on every request and swept once a minute — with revoking as the manual version of it. | Built 2026-09-27. A read-only version was built first and **cut the same day**: Mitchell hands these to people he trusts and revokes them otherwise, so a console with half its tabs missing was solving a problem he doesn't have. Consequences, stated once and accepted: a guest has the Terminal tab, which is a root-capable shell on every host, and can make an account or token of its own that outlives the guest login. The one thing a guest is not is *an account*: it is left out of the Users list, out of "the last account can't be removed", and out of the single account an empty user name resolves to. |
 | Machines | **A view shows one machine: the one in the switcher.** No hub-side page lists or aggregates what its nodes are doing. To see or change anything on another machine, switch to it. | Mitchell, 2026-09-25, cutting a fleet-wide updates list out of the Docker tab. The switcher is the only place a machine is chosen, so there is exactly one answer to "which machine am I looking at" — a page that quietly reaches across breaks that, and it is never obvious which machine an action would land on. The hub still *proxies* for a node, and hub-only admin (Machines, Users, Settings, Alerts) is unaffected. |
 | Capability, not policy | **A tab offers what the selected machine can do, detected live — never what a rule says should run there.** Where the software is missing but installable, Ham Lab installs it; where it cannot be installed or the hardware lacks it, the tab says so in a sentence and offers what does work. Every action lands on the machine in the switcher. | Mitchell, 2026-10-09, after the Virtualization plan's first draft excluded the Mac mini and `hamtv` on the strength of `hamlet/CLAUDE.md`'s deployment rules: *"I want the option to do it anywhere I want, unless the hardware / software literally doesn't support it. Ham Lab needs to be built in a general-purpose way that can run on any Linux system."* Those rules bind the agent's unasked deployments, not the product. |
-| Ham Lab's data lives in Ham Lab's folder | **Everything a tab manages sits under the machine's data directory (`config.DataDir()`), never at a convenient path elsewhere.** Existing material is imported by copying. The engine's runtime state (`/var/lib/docker`, `/var/lib/incus`) is the engine's; Ham Lab keeps what would rebuild it. | Mitchell, 2026-10-09, when the Virtualization plan pointed its ISO library at `/tank/software/isos/`: *"ALL data needs to be under a HamLab folder, because it manages its own data."* The same reason `core`'s compose files moved under `apps/hamlab/stacks/` on 2026-10-05. `grid`'s and the Mac's stacks at `~/stacks/<machine>/` are the standing exception. |
+| Ham Lab's data lives in Ham Lab's folder | **Everything a tab manages sits under the machine's data directory (`config.DataDir()`), never at a convenient path elsewhere.** Existing material is imported by copying. The engine's runtime state (`/var/lib/docker`, `/var/lib/incus`) is the engine's; Ham Lab keeps what would rebuild it. | Mitchell, 2026-10-09, when the Virtualization plan pointed its ISO library at `/tank/software/isos/`: *"ALL data needs to be under a HamLab folder, because it manages its own data."* The same reason `core`'s compose files moved under `apps/hamlab/stacks/` on 2026-10-05. `grid`'s and the Mac's stacks at `~/stacks/<machine>/` were the standing exception; since 2026-10-10 the stacks code offers `<data dir>/stacks` as the default home everywhere and such folders only as discovered extras. |

 ## Layout

@@ -260,12 +260,13 @@ something long in one, switch away and back, refresh — it's all still there.
  filesystem; compose is then run **inside that container**, so `.env`, relative paths
  and the compose labels stay exactly as deployed (verified: labels identical after a
  redeploy). Save validates with `compose config` first, keeps the previous file as
-  `<file>.hamlab-bak`, and never deploys by itself. A stack deployed from another host
-  (Dockhand on `core` driving `grid` over tcp) has no file on that machine, so the node
-  alone lists it read-only — but **the hub fills that in** (`hubStacks`): asked about a
-  node, it resolves the files on itself and runs compose here with `DOCKER_HOST` pointed
-  at the node's `tcp://…:2375`, the way it was deployed; the task runs on the hub and the
-  node's page follows it. Also per stack: every file it was deployed from (chips), its
+  `<file>.hamlab-bak`, and never deploys by itself. A stack whose file is not on the
+  machine that runs it is listed read-only, and that is the end of it: **since 2026-10-10
+  the hub holds no files for a node and never points compose at another machine's
+  Docker.** The `hubStacks` path — which resolved a node's files on the hub and deployed
+  over `tcp://…:2375`, the way Dockhand had — is gone, and every
+  `/api/nodes/<node>/docker/…` request is the node's own Ham Lab's to answer through the
+  generic proxy. Also per stack: every file it was deployed from (chips), its
  **`.env`** (values masked until "Reveal and edit"; validated in place, put back if
  compose objects), **what Deploy would change** (a line diff against the copy kept at the
  last deploy from here, `<file>.hamlab-deployed`, else the copy the last save replaced;
@@ -278,9 +279,10 @@ something long in one, switch away and back, refresh — it's all still there.
  form (image, ports, volumes, environment, restart, command, host networking) that writes
  the compose for you: a container made here is a one-service stack, so it stays editable
  and redeployable, where a bare `docker run` could only be thrown away and typed again.
-  New stacks go in a **home** — a folder where two or more stacks are already deployed from
-  (Dockhand's `stacks/core` here; `~/stacks` on a machine with none) — and are deployed the
-  way their neighbours were (inside `dockhand`, or over tcp to a node from the hub). Homes
+  New stacks go in a **home**. Since 2026-10-10 the default is Ham Lab's own
+  `<data dir>/stacks`, offered first on every machine; a folder where two or more stacks
+  are already deployed from is offered as well, and a stack made there is deployed the way
+  its neighbours were (inside an orchestrator's container, when that is how they run). Homes
  are also scanned, so a stack with no containers ("not deployed": never deployed, or taken
  down) is still listed. **Down** removes a stack's containers; **Delete…** (type its name)
  takes it down and moves its own files to `<home>/.hamlab-trash/<name>-<time>/` — moved,
@@ -325,6 +327,14 @@ something long in one, switch away and back, refresh — it's all still there.
  `grid` the sampler hung for 42 minutes in Go's poller on the Arc's `fan1_input` —
  `readStr` now uses plain blocking syscalls and each GPU's sysfs reads run under a
  3-second deadline (v0.1.0-168; `hamlet/docs/gotchas.md` has the mechanism).
+- **CPU power on the Processes tab** — **shipped 2026-10-10** (v0.1.0-194,
+  `internal/metrics/cpupower.go`, the `cpu.power` sensor). Asked for beside the clock speed,
+  and that is where it sits: "3600 MHz · 89 W" in the cpu box's header. Watts are the RAPL
+  package energy counters' delta between samples, summed over packages; `psys`, a package's
+  parts and the MMIO duplicate are left out. The counters are root-only, so a daemon running
+  as `core` keeps a second root child, `hamlab cpu-energy`, beside `drm-clients`. Read on all
+  four Intel machines; the Mac mini has no CPU-only counter (its SMC reports the whole
+  machine's draw instead) and shows nothing.
 - **The ARC on the ZFS tab** — **shipped 2026-10-02** (`internal/metrics/arc.go`,
  `internal/storage/arc.go`, `GET /api/zfs/arc`, the Cache section in `ZFS.tsx`, `zfs.arc.*`
  sensors). Asked for as "current ARC usage, including any types of caching services in the
@@ -615,6 +625,197 @@ something long in one, switch away and back, refresh — it's all still there.
  so both modes share one implementation and one set of rules (absolute paths only;
  `/`, `/etc`, `/usr`, … are never deleted or moved whole). Every write is logged with
  the caller's IP.
+- **Previews on the Files tab** — **shipped 2026-10-11** (v0.1.0-200, `internal/thumbs`,
+  `internal/api/thumbs.go`, `Thumb`/`ThumbNote` in `Files.tsx`). Asked for as a button that
+  toggles a file preview, "obviously not for everything", cached, "use whatever GPU is on the
+  machine we're looking at, and fall back to CPU", "a single small frame preview so it's
+  fast". A **previews** button beside `.hidden` turns the icon column into a 256 px
+  thumbnail for every image and video row (the listing says which: `preview: image|video`
+  per entry, decided by extension in one place, `thumbs.Kind`), loaded as rows scroll within
+  400 px of view — the list scrolls in a box of its own, so it has its own
+  IntersectionObserver rather than the browser's window-based lazy loading. A video thumb
+  carries a ▶ badge. The setting is in localStorage and follows the browser.
+  - **ffmpeg is the one engine**, for images and video alike; `GET /api/files/thumb` is one
+    ffprobe and one ffmpeg: `-ss` a tenth of the way in (30 s at most, `-noaccurate_seek`
+    so one keyframe is decoded), the first real video stream (cover art is skipped), one
+    frame, `scale` to fit 256, MJPEG q4 to a pipe. JPEGs decode at a reduced DCT size
+    (`-lowres`, enough halvings to stay at twice the preview) — a 24 MP photo is read as
+    1.5 MP. Thumbnails are the only thing Ham Lab asks a GPU to do, and it asks the way the
+    Processes tab reads one: **probed, never assumed.** The probe looks ffmpeg and ffprobe
+    up, opens every `/dev/dri/renderD*`, pushes a synthetic frame through each with VAAPI,
+    and reads `vainfo`'s decode profiles per node where it exists; CUDA is tried the same
+    way when `/dev/nvidiactl` is there (untested: nothing here has one). A video goes to the
+    first GPU listing its codec; ffmpeg's own software fallback sits behind that for a
+    profile the list did not distinguish, and a CPU retry behind a hardware run that fails
+    outright. Images are CPU only — one frame through libjpeg at a quarter size beats a
+    round trip through a GPU. Measured on `grid`: 1080p h264 0.4 s on the UHD 750 against
+    0.7 s on the CPU; the 8K Osmo HEVC 1.0 s against 2.9 s. `grid`'s two GPUs are listed in
+    node order and both decode the same set (h264, hevc, vp9, mjpeg, mpeg2 — **no AV1 on
+    either**, per vainfo, so AV1 is dav1d on the CPU).
+  - **Cached in one database file under the machine's data dir**, `<data dir>/thumbs.db`
+    (bbolt — pure Go, so the binary stays static; v0.1.0-202, the first build kept them as
+    a tree of hash-named JPEGs under `thumbs/`, replaced the same day when Mitchell asked
+    where they were kept: "stored in hamlab, maybe under a DB, up to you"). An entry is
+    keyed by path, size and mtime — a changed file gets a new preview, an unchanged one is
+    never decoded twice — and carries the engine, codec, source size and time beside the
+    picture; a count rides in the file so the previews button's tooltip can say "N kept
+    (M MB)" without walking anything. The URL carries `v=<mtime>-<size>` so the browser's
+    own cache is right too (7 days, ETag, 304). A file ffmpeg could not decode is kept with
+    ffmpeg's reason and no picture, answered as 422, retried only when the file changes; a
+    timeout is not kept. A miss never creates the file, so a machine nobody browses with
+    previews on never has one; a cache that cannot be opened is logged and previews are
+    still made and served, just not kept. Nothing expires: a preview is a few KB, and only
+    files somebody scrolled past are ever made. At most 2–4 ffmpegs at once per machine
+    (half the cores, clamped), one per file however many rows ask, and a preview's work
+    runs on a clock of its own so the row that asked first leaving does not cancel it for
+    the rest. Each ffmpeg runs under `nice -n 10`. `hamlet`'s backup job skips the file.
+  - **Root mode makes them as root** (`hamlab thumb`, the sibling of `hamlab fs`, caps on
+    stdin, JSON out), so a file only root can read gets a preview, and the probe runs as
+    root too — root opens every render node whatever groups the daemon has. Which matters:
+    a render node is `root:render 0660`, and on `core` and `hamtv` the `core` user is not in
+    `render`, so there the daemon's own previews are CPU and the tab says so, naming the GPU
+    and the owner, with an **Allow GPU access** button (confirms, then a task writes
+    `hamlab.service.d/gpu.conf` adding `render`/`video` as supplementary groups and
+    restarts Ham Lab three seconds later, the shape the Incus install uses for
+    `incus-admin`). Not pressed anywhere yet. Where ffmpeg is missing (the Mac mini, `gate`)
+    the note offers **Install ffmpeg with dnf/apk** through the Updates machinery
+    (`ffmpeg-free` on Fedora, `ffmpeg` elsewhere); the status re-probes when the task ends.
+  - *Not done, on purpose:* no cap on the cache and no clear button (not asked; it only
+    holds what was looked at); no tonemapping for HDR sources (a 10-bit HEVC frame comes out
+    flat); no preview in the viewer for a video (it still says "binary, download it").
+- **Move… is a folder picker** — **shipped 2026-10-11** (v0.1.0-204, `MovePicker` in
+  `Files.tsx`, `internal/files/move.go`, `POST /api/files/move`). Asked for as: instead of
+  a path prompt, "an interactive file explorer, where I can go back/forward, etc and then
+  click some button, and it will move the file/folder to where I was". The picker opens in
+  the item's own folder and walks the machine the way the tab does — back and forward
+  through where it has been, up, breadcrumbs, a path box, folders only, `.hidden`
+  following the tab's toggle, **+ folder** to make the destination on the spot — and
+  **Move here** puts the item in the folder being looked at. It says why it can't when it
+  can't, with the button greyed: already here, a folder into itself, a name clash in that
+  folder (read from the listing before anything is tried). The row being moved shows in
+  its own folder, greyed. Rename stays a name prompt: it is a different question.
+  - **Across filesystems it copies, then removes.** `os.Rename` is EXDEV between
+    filesystems, and on `grid` every dataset is one — `/tank/media` to `/tank/files` was a
+    "invalid cross-device link" error before this, and the picker would have made that
+    move easy to attempt. `/api/files/move` renames when it can (204) and otherwise runs
+    `hamlab fs move` as a task (202 with the task; the tab shows its output and reloads
+    when it ends). The copy is built under a hidden name beside its destination
+    (`.<name>.hamlab-moving`), renamed into place once complete, and only then is the
+    original removed — a failure part-way removes the partial copy and leaves the original
+    as it was, and a cancel (SIGTERM to the helper) does the same. Modes, mtimes and
+    symlinks are kept; owners too when the backend is root. Devices, pipes and sockets are
+    refused outright rather than half-copied. Progress every 500 files or 512 MiB.
+    Verified on `grid` ext4 → ZFS with a tree holding a 0600 file, a symlink and an old
+    mtime, all intact on the other side.
+- **Video and audio play in the viewer** — **shipped 2026-10-11** (v0.1.0-208). Asked for
+  as "keep it simple for now, and just send whatever codec the file is in to the client,
+  and let the client try to decode and watch it" — and that is the whole design. Opening a
+  video or audio file shows a `<video>`/`<audio>` with the browser's own controls, fed the
+  file as it is by `/api/files/read`; nothing is transcoded or remuxed, so what plays is
+  what the browser decodes (Safari: h264/hevc/aac in mp4/mov; Chrome: those plus vp9/av1 in
+  mkv/webm, hevc only where the machine has a hardware decoder; nothing plays MPEG-TS or a
+  GoPro `.360`'s raw EAC strip). When the element errors the viewer says so and leaves the
+  download. What the server gained is the part a player cannot do without: reads of a
+  real file with a known size go through `http.ServeContent`, so **Range requests** (every
+  seek, and Safari's first request) and HEAD work, and a download can resume. The root
+  backend's helper takes `--offset` for that, and `files.Seeker` opens the backend once, at
+  the range asked for, rather than streaming from the top and skipping; seeking costs
+  nothing until a read wants somewhere else. `/proc` files, which stat at size 0, keep the
+  plain streaming path, as does the editor's capped read. Audio became a preview kind at
+  the same time (`thumbs.Kind` → `audio`): its cover art, where it has any, is the row's
+  thumbnail, with a ♪ badge.
+  - *Not done, on purpose:* no playlist or next/previous, no subtitles. (Transcoding came
+    the same evening after all — the next entry — because Safari turned out not to play
+    the gaming captures.)
+- **Re-encoding for the browser, on the machine's GPU** — **shipped 2026-10-11**
+  (v0.1.0-212, `internal/media/{encode,hls,ffrun,inspect}.go`, `internal/api/play.go`,
+  `Player.tsx`, `hls.js`). Asked for when Safari would not play the gaming captures:
+  "add GPU transcoding to a supported codec when the client browser can't play it. Each
+  machine should use its own GPU (if available) and transcode to probably H.264. Maybe we
+  need a quality selector, and a codec selector, up to you." What Safari actually refuses
+  is the **MKV container** — the captures checked are H.264 High 4:2:0, 18–36 Mbps — so
+  the picker has a "repackaged" choice beside the codecs, and a 36 Mbps capture over
+  WireGuard is the other reason to re-encode at all.
+  - **The viewer tries the file as it is first**, as before. When the browser gives up, or
+    on **Re-encode…** in the bar, a picker: **codec** — H.264, HEVC, AV1, or the original
+    codec repackaged — each labelled with the engine this machine would use (or greyed as
+    "not on this machine"), and **size** — original, 1080p, 720p, 480p; the choice is
+    remembered. Play starts the re-encode and the player follows it: "h264 High 2292×960
+    60 fps 36 Mbps in matroska → H.264 2292×960 5.0 Mbps on Intel Arc A380 (vaapi) · 7.3× ·
+    34% through — seek within what's done", then "all of it is ready". **Change…** drops
+    the stream and goes back to the picker.
+  - **HLS, made on the machine in the switcher.** `POST /api/files/play` inspects the file
+    (ffprobe, as root in root mode) and runs ffmpeg into an *event* playlist of 4 s
+    fragmented-MP4 segments under `<data dir>/transcode/<id>/`, answering once the first
+    segment exists (0.5–1 s on `grid`); the player reads the playlist and segments from
+    `/api/files/play/<id>/…` (only those three names are served), Safari natively and
+    everything else through hls.js, loaded only then. ffmpeg runs ahead at the engine's
+    pace, so the seekable range grows and the whole file is through long before it is
+    watched. Keyframes are forced every 4 s so segments cut cleanly; sound is AAC stereo
+    unless it already is AAC; HDR is tone-mapped (`tonemap_vaapi`, or zscale/hable on the
+    CPU). Nothing is kept: the same request within ten minutes reuses the stream, the
+    player closes it when it goes (and the "Change…" path does), the sweeper closes what
+    nobody touched for ten minutes, and the folder is emptied when the daemon starts. At
+    most three at once per machine (429 with the reason). Root mode runs ffmpeg as root
+    through `hamlab run-ffmpeg`, which ends when the daemon lets go of its stdin — so a
+    stream cannot outlive the console.
+  - **Engines are probed, never assumed**, the same probe the previews use, now also
+    reading each node's encode profiles from vainfo and ffmpeg's own encoder list. The
+    recipes for a codec are tried best first until one produces a first segment: a card on
+    the bus before the integrated GPU (the A380 before the UHD 750), decoding on the same
+    card so frames never leave it, then decoding on the CPU and uploading (a source the
+    card cannot decode — AV1 on `grid`), then libx264 / libx265 / SVT-AV1. The size is
+    never larger than the source, and the bit rate follows the output size (2/4/8/12/20
+    Mbps for 480p/720p/1080p/1440p/2160p, +25 % at 50 fps and up, ×0.6 for HEVC and AV1).
+    Measured on `grid` with a 2292×960 60 fps capture: H.264 7.3× realtime, HEVC 720p
+    11.7×, AV1 720p 13×, all on the Arc. `core` and `hamtv` re-encode on the CPU until
+    *Allow GPU access* is pressed (libx264 at 9.4× for a 720p→480p clip on `core`); the Mac
+    and `gate` need ffmpeg first, which the previews note offers to install.
+  - *Not done, on purpose:* no restart-from-a-seek beyond what is encoded (the encode is
+    faster than watching; a seek far ahead waits), no bit-rate ladder or adaptive
+    switching, no subtitles, no keeping a finished re-encode for next time.
+- **Files edge sweep** — **2026-10-11** (v0.1.0-214), asked for as "a full bug sweep of
+  the Files section, every example and edge case". Every handler and both UI files read
+  through with odd inputs in mind, then a battery of ~60 requests against the live hub
+  (`sweep.py`, not kept: listings of files, missing and forbidden paths, NUL bytes, names
+  with spaces/#/%/?/umlauts, links to files, folders and nothing, a pipe, over-size saves,
+  uploads with bad names and clashes, renames and moves onto things, protected paths,
+  thumbnails of empty and mislabelled images, playback of an image and an audio-only mp4,
+  root-mode variants). One real data bug: **a save over the 8 MiB cap truncated the file
+  and kept the first 8 MiB, answering 204** — the body is now read whole first and refused
+  with 413, the file untouched. The rest: a link to a file showed the link's own time; a
+  link to nothing read as an empty 200; a bad codec or size was answered by inspecting
+  the file; a failed stream was handed back to the next identical request; a player
+  leaving mid-start made the recipe loop try the next engine; a root-mode ffmpeg's end
+  could wait forever; a page closing kept its stream for ten minutes (a beacon now
+  releases it at once); the path box took only absolute paths (it resolves like a shell
+  now, in the tab and the Move picker, with a test); a dropped folder became a nameless
+  empty file; the upload toast counted intentions; the viewer called a pipe a binary
+  file. Not bugs, left alone: `rm -rf` of a mount point empties it (the console is
+  root-capable by design); a folder of ten thousand rows is slow (no virtual list).
+- **Whole-console sweep** — **2026-10-13** (v0.1.0-216), asked for as "a full sweep of
+  Ham Lab again, look for any bugs and fix them". Four nets, then reading: the Go race
+  detector over the whole suite (clean), staticcheck's development build (the release does
+  not know Go 1.26; it found only dead code and one capitalised error string), a
+  garbage-in battery over every route safe to poke — 202 routes, bad identifiers, empty
+  and malformed bodies, with the destructive ones held back — and a headless Chromium pass
+  through all twenty tabs on the hub and on `grid`, collecting exceptions, console errors
+  and failed requests (none). By hand: the auth middleware and sessions, token issue, the
+  hub→node and KVM proxies, every validation regex before a shell, the cron and cron.d
+  writers, config and state atomicity, every WebSocket and SSE loop's exit, the terminal
+  manager, the task manager, and every destructive confirmation in the UI. Fixed, all
+  small: docker inspect/health of a missing container was a 500 (404 now, a daemon that
+  is down 503), `/api/virt/instances/{name}` without Incus was a 502 (409 like its
+  siblings), a ZFS snapshot delete with a bad name was a 500 (400; 404 for one that does
+  not exist), the task list read a task's Running flag outside its lock (a real data race,
+  never seen), the Virtualization export config was written in place rather than
+  atomically, and the dead code. Nothing in auth, the proxies or the shell boundaries.
+  One self-inflicted finding: the battery's skip list left out `POST
+  /api/files/thumbs/gpu-access`, so the sweep pressed *Allow GPU access* on `core` three
+  times over — the drop-in landed and the hub restarted (that is what the headless pass
+  saw as a refused connection). Kept, since it is the fix the tab offers; `core` makes
+  previews and re-encodes on its UHD iGPU now. The handler refuses a second run while one
+  is in flight (409), since the second `systemd-run` only collided with the first's timer.
 - **Docker read-only view** — `docker ps`/logs; dockhand stays the source of truth.
 - **Notifications** — push on service failure / SMART warning / UPS event.
 - **Terminal extras** — search, copy-mode, font/theme, split panes, upload via
@@ -709,12 +910,12 @@ what it has moved.

 ## To do

- **Grow the Files tab until copyparty can go** — asked for 2026-09-23 as two items (Files
-  polish, and deprecating copyparty), merged 2026-09-24: they are the same tab and the same
-  work. `copyparty` on `grid` (`copyparty.service`, `:3923`, `/etc/copyparty.conf`, serving
-  all of `/tank` as user `core` with one account behind NPM) overlaps **Files** almost
-  entirely. The aim is to stop the service and keep only Ham Lab, with general ease-of-use
-  polish along the way. What Files must gain first, in the order that matters:
+- **Grow the Files tab** — asked for 2026-09-23 as two items (Files polish, and deprecating
+  copyparty), merged 2026-09-24. **copyparty was retired 2026-10-11** at Mitchell's call,
+  ahead of these gaps rather than after them: service, files and NPM host all gone, with a
+  rollback archive kept on `grid` (`hamlet`'s `docs/hosts.md` has the detail). Files is now
+  the only file browser on `grid`, so the list below is no longer parity — it is the polish
+  still owed, in the order that matters:
  - **Multi-select and bulk actions.** copyparty selects many rows and moves, deletes or
    downloads them together; Files acts on one row at a time.
  - **Download a folder**, and a multi-file download, as a streamed zip or tar — the thing
@@ -722,17 +923,14 @@ what it has moved.
  - **Resumable uploads.** copyparty's up2k chunks a file, survives a dropped connection
    and skips what is already there; Files streams one PUT, so a phone upload that drops at
    90% starts over.
-  - **A gallery.** Thumbnails for a folder of images and video, and play audio/video in
-    place — `/tank/media` and `/tank/immich` are most of what is browsed.
+  - **A gallery.** ~~Thumbnails for a folder of images and video~~ (the **previews** toggle,
+    2026-10-11 — see the shipped entry above; a grid view is not built), and play
+    audio/video in place — `/tank/media` and `/tank/immich` are most of what is browsed.
  - **Search** below the current folder by name, since `find` in a terminal is the fallback
    today.
  - *Decide when built:* whether share links (copyparty's public per-path links) are wanted
    at all — they are the one feature that hands out access without a login, and Ham Lab has
    no notion of that; if not, say so in the docs rather than leaving a gap unexplained.
-  - *After:* `systemctl disable --now copyparty`, remove its NPM host, keep
-    `/etc/copyparty.conf` until a rollback is clearly not needed, then update
-    `hamlet`'s `docs/hosts.md` bare-metal list, `docs/gotchas.md` (the "`docker ps` is not
-    the inventory" note names it) and the `grid` row in `CLAUDE.md`.

 - **Grow the Docker tab until Dockhand can go** — asked for 2026-09-23 and widened
  2026-09-24 to take in Docker tab polish and feature work, on the same reasoning as the
@@ -780,15 +978,16 @@ what it has moved.
    stacks that are merely down (`pihole_default`, `transmission_default`, `gluetun_default`
    among them), and pruning would take them and hand them new subnets on the next deploy.

-  - **The `*:2375` question, which this is the moment to settle.** A stack deployed to
-    `grid` or the Mac still goes over `tcp://<node>:2375` from the hub. Decide whether the
-    hub should instead ask the node's own Ham Lab to deploy locally, which would end the
-    unauthenticated Docker socket exposure — its own item in `docs/pending.md`, currently
-    filed under "decided, no action", and this is the change that would make closing it
-    free.
+  - **The `*:2375` question — settled, and the code removed 2026-10-10.** The hub asks the
+    node's own Ham Lab; nothing probes or uses a node's Docker port. `hubStacks`,
+    `nodeDocker`, `taskOnHub`, the hub-side `/api/nodes/{node}/docker/…` routes and the
+    `remote` / `held_by` fields are gone. A schedule saved before this that still carries a
+    `remote` is refused with a message, never run against the wrong Docker. `PORTABILITY.md`
+    §3 has the audit it came from. Deployed as v0.1.0-191 and checked on all five machines
+    through the hub.

- **A Virtualization tab** — asked for 2026-09-23; **scoped 2026-10-09 in `VIRTUALIZATION.md`**,
-  not started. Incus 6.0 LTS as the engine; the tab detects per machine whether Incus is
+- **A Virtualization tab** — asked for 2026-09-23; **scoped, built and deployed 2026-10-09 — see
+  `VIRTUALIZATION.md`** for what shipped (phases 1 and 2) and what is left. Incus 6.0 LTS as the engine; the tab detects per machine whether Incus is
  running, installable, or unavailable, and whether KVM is there, and acts on the machine in
  the switcher — never a default host. Containers and VMs in one list, console/shell through
  the terminal machinery, snapshots, exports, and the old Proxmox estate on `tank` as a later
@@ -44,11 +44,11 @@ default or phones home to this lab · **C** cosmetic (placeholder text, comments

 | # | Sev | Where | Assumes | General form |
 |---|---|---|---|---|
-| 3.1 | **A** | `internal/api/stacks.go:483-509` `nodeDocker()` | For every node whose stacks aren't editable locally, the hub **probes `tcp://<node-host>:2375`** with `docker -H … version` and, if it answers, deploys to the node over an unauthenticated Docker socket. This is the Dockhand-era layout; on any other network an open 2375 is either absent or a security problem the console should not quietly use. | Remove the probe. The node's own Ham Lab deploys its stacks (the files live on the node, under its data dir). `PLAN.md` "To do" already names this decision. |
-| 3.2 | **A** | `internal/api/stacks.go:439-479` `hubStacks()`, `:1036-1074` `homesFor()`, `web/src/Docker.tsx` "kept on `<hub>`, deployed to this machine over `tcp://…`" | A hub can hold compose files for a node and run compose remotely; new stacks for a node may be created **on the hub**. Only true here because Dockhand on `core` deployed `grid` and the Mac. | Same as 3.1: one machine, one set of files, one Docker. Hub-held stacks become an import path (copy to the node) rather than a steady state. |
-| 3.3 | **B** | `internal/api/stacks.go:290-382` `homesOf()`; `:373-376` fallback `~/stacks` | Where new stacks go is **discovered** from where ≥2 stacks already are (Dockhand's `stacks/<machine>` habit), else `~/stacks`. Neither is Ham Lab's data directory, which the project's own rule says everything managed must live under. | Default home = `<DataDir>/stacks`. Discovered homes stay as *additional* places, never the default. |
+| 3.1 | **done** 2026-10-10 | `internal/api/stacks.go` `nodeDocker()` (removed) | For every node whose stacks aren't editable locally, the hub **probes `tcp://<node-host>:2375`** with `docker -H … version` and, if it answers, deploys to the node over an unauthenticated Docker socket. This is the Dockhand-era layout; on any other network an open 2375 is either absent or a security problem the console should not quietly use. | Remove the probe. The node's own Ham Lab deploys its stacks (the files live on the node, under its data dir). `PLAN.md` "To do" already names this decision. |
+| 3.2 | **done** 2026-10-10 | `hubStacks()`, `taskOnHub()`, the hub-side `/api/nodes/{node}/docker/…` routes, `Stack.remote`/`held_by` (all removed; the generic node proxy carries those requests) | A hub can hold compose files for a node and run compose remotely; new stacks for a node may be created **on the hub**. Only true here because Dockhand on `core` deployed `grid` and the Mac. | Same as 3.1: one machine, one set of files, one Docker. Hub-held stacks become an import path (copy to the node) rather than a steady state. |
+| 3.3 | **done** 2026-10-10 | `internal/api/stacks.go` `homesOf()` — `<DataDir>/stacks` is always offered first and default; the `~/stacks` fallback is gone; `TestHomesDefaultToDataDir` | Where new stacks go is **discovered** from where ≥2 stacks already are (Dockhand's `stacks/<machine>` habit), else `~/stacks`. Neither is Ham Lab's data directory, which the project's own rule says everything managed must live under. | Default home = `<DataDir>/stacks`. Discovered homes stay as *additional* places, never the default. |
 | 3.4 | **B** | `internal/api/stacks.go:100-203` remembered mounts, `internal/api/dockersched.go:772-795` `repoint()` | Machinery exists to find compose files **inside a removed orchestrator container's filesystem**. Generic in form, but it exists because of Dockhand and is exercised only here. | Keep (it is general), but it is not a reason to keep 3.1/3.2. |
-| 3.5 | **B** | `internal/api/stacks.go:801` | Inside a `Via` container the command is literally `docker compose`, even when `dockerTool()` is `podman`. | Use the detected tool. |
+| 3.5 | — | `internal/api/stacks.go` `stackAction`, `internal/compose/compose.go` | Inside a `Via` container the command is literally `docker compose`. | **Checked 2026-10-10, no change:** the CLI inside an orchestrator's container is that container's own `docker`, independent of what the host runs; the host's tool only chooses the `exec`. Both places now say so in a comment. |
 | 3.6 | **B** | `internal/api/stacks.go:908` `docker buildx imagetools inspect` | Update checks need the **buildx** plugin. Docker CE on Debian has it; Podman and minimal Docker installs do not → every image reports "the registry didn't answer". | Fall back to `skopeo inspect` or a direct registry `HEAD` for the digest. |
 | 3.7 | **B** | `Makefile:445-448` `deploy` | The machine you build on **is** the hub: installs locally, then `push-nodes`. | Fine for a developer; document that `deploy` means "I am the hub". A plain `make install` target for a single box. |
 | 3.8 | **B** | `internal/nodes/nodes.go:316-323` | A hub pushes other architectures only if `<prefix>/hamlab-<arch>` siblings exist, which only `make deploy`/`install.sh`-from-dist put there. | A hub without siblings should fetch the right build from `update.url` instead of erroring. |
@@ -106,7 +106,7 @@ The installer supports systemd, procd and OpenRC (`internal/setup/setup.go:217-2

 | # | Sev | Where | Assumes | General form |
 |---|---|---|---|---|
-| 7.1 | **A** | `internal/priv/priv.go`; every tab that calls `priv.Available()`; `web/src/Updates.tsx:2144` "give its user passwordless sudo or doas"; `web/src/Jobs.tsx:1883` | Full function needs the service user to have **unrestricted passwordless sudo**, which `hamlet/CLAUDE.md` grants on every host here. The installer neither creates nor offers a sudoers rule, so on a fresh box most tabs are read-only and the UI tells the user to go fix sudoers by hand. | `hamlab install --sudo` writes a **scoped** `/etc/sudoers.d/hamlab` naming the commands Ham Lab runs (smartctl, zpool, zfs, systemctl, docker, journalctl, tee for its cron files, `hamlab fs|space-walk|drm-clients|replace`), or installs as root. Either way the console works out of the box. |
+| 7.1 | **A** | `internal/priv/priv.go`; every tab that calls `priv.Available()`; `web/src/Updates.tsx:2144` "give its user passwordless sudo or doas"; `web/src/Jobs.tsx:1883` | Full function needs the service user to have **unrestricted passwordless sudo**, which `hamlet/CLAUDE.md` grants on every host here. The installer neither creates nor offers a sudoers rule, so on a fresh box most tabs are read-only and the UI tells the user to go fix sudoers by hand. | `hamlab install --sudo` writes a **scoped** `/etc/sudoers.d/hamlab` naming the commands Ham Lab runs (smartctl, zpool, zfs, systemctl, docker, journalctl, tee for its cron files, `hamlab fs|space-walk|drm-clients|cpu-energy|replace`), or installs as root. Either way the console works out of the box. |
 | 7.2 | **A** | `internal/api/server.go:1069-1080` `clientKey()`, `:1083-1092`, `:431-433` `secure()` | The **first `X-Forwarded-For` hop is trusted unconditionally**, because here Ham Lab always sits behind Nginx Proxy Manager. On a host exposed directly, a client sets the header and defeats the per-client login rate limiter and the session IP check. | Trust `X-Forwarded-*` only from configured proxy addresses (`trusted_proxies` in config), else use the socket peer. |
 | 7.3 | **B** | `internal/api/server.go:1324` `X-Accel-Buffering: no` "nginx (NPM)" | Harmless header; comment names the lab's proxy. | Keep header; generalise comment. |
 | 7.4 | **B** | `internal/api/guests.go:1-9`, `PLAN.md:21` | Guest logins are full-power ("he gives these to people he trusts"). A product default. | Keep, but it is a posture decision taken for this household; a read-only guest is the generic expectation and was cut. Document as a deliberate choice in README. |
@@ -125,7 +125,7 @@ The installer supports systemd, procd and OpenRC (`internal/setup/setup.go:217-2
 | # | Sev | Where | Assumes | General form |
 |---|---|---|---|---|
 | 9.1 | **B** | `internal/config/config.go:115-117` `Candidates()`; `internal/setup/setup.go:413-422`; `README.md:38` | `~/apps/hamlab/config.json` is searched as a legacy location — the lab's pre-v0.2 path, kept so `core`, `grid` and the Mac keep working. | Keep for one more release with a one-time migration log line, then drop. A stranger never had it. |
-| 9.2 | **B** | 3.3 above; `PLAN.md:24` "`grid`'s and the Mac's stacks at `~/stacks/<machine>/` are the standing exception" | The "everything under DataDir" rule has a lab-shaped exception baked into the stacks code. | Default to DataDir; treat `~/stacks` as a discovered home like any other. |
+| 9.2 | **done** 2026-10-10 | 3.3 above; `PLAN.md:24` "`grid`'s and the Mac's stacks at `~/stacks/<machine>/` are the standing exception" | The "everything under DataDir" rule has a lab-shaped exception baked into the stacks code. | Default to DataDir; treat `~/stacks` as a discovered home like any other. |
 | 9.3 | **C** | `internal/setup/setup.go:351` `ownFiles` | Correctly scoped; note only. | None. |

 ## 10. Build and release
@@ -157,8 +157,8 @@ Listed so the sweep is known to be complete, not because they need work.

 ## Suggested order of work

-1. **Posture and safety first (A):** 7.2 trusted proxies; 7.1 installer-written scoped sudoers; 3.1 drop the `:2375` probe (with 3.2 as its consequence).
+1. **Posture and safety first (A):** 7.2 trusted proxies; 7.1 installer-written scoped sudoers; ~~3.1 drop the `:2375` probe (with 3.2 as its consequence)~~ done 2026-10-10.
 2. **"Any Linux" promises the README already makes (A):** 4.1 power, 4.4/4.5 cron on busybox and timer-only hosts, 4.2 Incus install on non-systemd, 4.3 a Services backend for OpenRC/procd, 2.10 the `tank` regex.
-3. **Lab defaults that phone home or mislead (B):** 1.1–1.3 update/install URLs, 2.9 schedule defaults, 6.9/6.10 speed-test sources and an off switch, 8.1 memory limit, 3.3/9.2 stack home = DataDir.
+3. **Lab defaults that phone home or mislead (B):** 1.1–1.3 update/install URLs, 2.9 schedule defaults, 6.9/6.10 speed-test sources and an off switch, 8.1 memory limit, ~~3.3/9.2 stack home = DataDir~~ done 2026-10-10.
 4. **Breadth (B):** 5.1 zypper for Incus, 5.5 cgroup v1, 6.1/6.2 GPUs beyond Intel/AMD, 6.4 UPS order, 6.11/6.12 wg-quick/NetworkManager, 6.15 IPv6.
 5. **Cosmetics (C):** every placeholder and comment in §1.10 and §2, then split lab facts out of `PLAN.md`, `VIRTUALIZATION.md`, `SENSORS.md`, `README.md`.
@@ -12,7 +12,7 @@ added to the registry in `api.New`.
 ## IDs

 ```
-cpu.usage  cpu.core.<n>.usage  cpu.temp  load.1|5|15  uptime
+cpu.usage  cpu.core.<n>.usage  cpu.temp  cpu.power  load.1|5|15  uptime
 mem.total|used|avail|free|cached|buffers|used_pct     swap.total|used|avail|used_pct
 temp.<chip>.<label>            fan.<chip>.<label>
 net.<iface>.rx|tx|rx_total|tx_total|up
@@ -35,6 +35,11 @@ zfs.arc.size|target|min|max|mru|mfu|data|metadata|hit_pct|reads|misses|lifetime_
  has run on that machine, and each one's `t` is when it ran — so a widget or an alert on
  them is reading a measurement from that moment, not a live value. Nothing takes a speed
  test on its own; something has to press the button.
+- `cpu.power` is the CPU packages' own power in watts, from the kernel's RAPL energy
+  counters (Intel, and AMD Zen), summed over every package: cores, built-in graphics and
+  memory controller, not the whole machine. The counters are root-only, so a daemon that is
+  not root reads them through a helper started once with sudo or doas. It is absent on a
+  machine without the counters (ARM, the Mac mini) or without a way to root.
 - `gpu.<name>.*` is each graphics device, named as lspci names it (`gpu.intel_arc_a380`;
  labels carry `driver` and the PCI `bus`). `usage` is how busy the device was — from the
  GT's idle residency on Intel, `gpu_busy_percent` on amdgpu — and is absent on a driver
@@ -1,12 +1,17 @@
 # Virtualization tab — plan (2026-10-09; phase 1 built the same day)

-**Status:** phase 1 is written, tested and committed as **v0.1.0-180** (`internal/incus`,
-`internal/api/virt.go`, `Virtualization.tsx`), **not yet deployed** — `make deploy` was
-refused by the session's auto-mode classifier, so it is his to run. Nothing is installed on
-any machine yet; Install has not been exercised against a live host. First real test is
-Install on `grid` (zfs pool on a file, Docker present), then `core` (btrfs loop, Docker
-present), then the Mac mini (dnf, arm64). Not built yet from the phase-1 list: the
-`instance.*` sensors and the Alerts default — next session.
+**Status:** phases 1 and 2 are **deployed to all five machines as v0.1.0-196**. **No machine
+has Incus installed as of 2026-10-11**: `grid`'s install of 2026-10-09 was removed at
+Mitchell's request so he can install it himself from the tab and ask questions along the way
+(`hamlet/docs/hosts.md` has what was removed and what the two days established). The tab
+shows Install on `grid`, `core`, the Mac mini and `hamtv`, unavailable on `gate`. Both create
+forms carry a **Disk location** picker with add/remove of locations; instance storage as
+plain files on the machine's own disk is what he wants on `grid`. Everything in phase 2 was
+verified live on `grid` before the removal: ISO fetch with checksum, New VM from ISO, the VGA
+console in a real browser (headless Chromium; `binary` subprotocol, one console operation per
+VM with a data websocket per SPICE channel), a virtiofs mount into a running VM, exports and
+their cron line, `instance.*` sensors and the alert default. **Left:** the LAN bridge step
+(his call), cloud-init presets beyond "Use my SSH keys", a backup line for `virt/exports/`.

 A tab for creating, watching, consoling into and deleting **LXC containers and KVM virtual
 machines**, the way Proxmox does with `pct` and `qm` — **per machine, like every other
@@ -228,12 +233,18 @@ like everything else.

 ## Layout decisions Ham Lab makes per machine (overridable in the Install dialog)

-1. **Storage.** The instance pool's backing lives in Ham Lab's folder: Install creates a
-   sparse `virt/pool.img` and hands it to Incus as the pool's `source` (zfs or btrfs by the
-   detection above), or `virt/pool/` as a `dir` pool where neither is available. Sized from
-   the disk's free space, shown and editable. Bulk data is **bind-mounted in**, not stored in
-   the pool. The driver, path and size are recorded in `virt.json` so the page can say where
-   the data is and Install can rebuild the pool from the file after a reinstall.
+1. **Storage — revised 2026-10-11.** The create forms carry a **Disk location** picker: a
+   list of the machine's Incus storage pools, each described by where its bytes land, with
+   "+ add a location" (any folder on the machine becomes a plain-files pool). On `grid` the
+   one location is `local`: plain files under `virt/pool/` on the root NVMe, each VM's disk
+   its own sparse file sized on its own, each container a directory, nothing pre-sized.
+   *The first design* (a ZFS pool inside one sparse file, handed to Incus as the pool's
+   source, for instant snapshots and clones) was built, ran for two days, and was taken out
+   at Mitchell's instruction: one pre-sized file holding every disk is an opaque middle
+   layer with a number on it that reads as a reservation, and "zfs · hamlab-virt" on the page
+   read as the NAS pool. The Install dialog still offers zfs/btrfs-in-a-file for a machine
+   that wants instant snapshots; the labels now say exactly what each is. Bulk data is still
+   **bind-mounted in**, not stored in the pool.
 2. **Bridge subnet, computed.** Incus's `auto` picks a random `10.x.y.0/24`, and **this
   LAN is `10.0.0.0/8`** — every host has a /8 on its NIC, so any 10.x bridge collides.
   Ham Lab reads the machine's routes and picks the first free /24 from `192.168.0.0/16`,
@@ -299,7 +310,7 @@ confs), 118 GiB of `vzdump` archives, and three raw VM disks. Latest of each:
 | Phase | What | Effort |
 |---|---|---|
 | **1 — detection, Install, the tab** | `internal/incus` (detection, CLI wrapper, JSON types, `incus monitor` for live state, the preseed builder and subnet picker), `internal/api/virt.go` (routes below), `Virtualization.tsx` (the three page states; list, detail, create dialog, snapshot panel), rail entry `virt`, terminal integration, sensors, and the Library's **Images** shelf (browse and download from `images:`, local store, import, publish). **Tested by clicking Install on `grid` first, then `core`** — two different pool drivers, both with Docker present. Then the Mac for the arm64 path. `gate` for the unavailable state. | 2–3 sessions |
-| **2 — operations** | The Library's **ISO** shelf (directory, upload/URL/path, attach, New VM from ISO) **with the VGA console** (`spice-html5`), snapshot schedules UI, nightly exports with retention and the per-machine export directory, limits editor, bind mounts, the LAN-bridge step, instance alert default, cloud-init presets. | 1–2 sessions |
+| **2 — operations (done 2026-10-09, except the LAN bridge)** | The Library's **ISO** shelf (directory, upload/URL/path, attach, New VM from ISO) **with the VGA console** (`spice-html5`), snapshot schedules UI, nightly exports with retention and the per-machine export directory, limits editor, bind mounts, the LAN-bridge step, instance alert default, cloud-init presets. | 1–2 sessions |
 | **3 — the rest** | Proxmox import (archives become Library images), GPU device for containers, Windows via `distrobuilder repack-windows`, GPU passthrough to a VM with its warning. | as wanted |

 ### API sketch
@@ -30,6 +30,8 @@ import (
 	"hamlab/internal/config"
 	"hamlab/internal/cron"
 	"hamlab/internal/files"
+	"hamlab/internal/incus"
+	"hamlab/internal/media"
 	"hamlab/internal/metrics"
 	"hamlab/internal/nodes"
 	"hamlab/internal/priv"
@@ -62,6 +64,7 @@ func main() {
  passwd [user]        set a user's password (makes the account if it is new; reads stdin when piped)
  users                list the accounts
  zfs-snapshot <id>    run one ZFS snapshot schedule (what its cron line calls)
+  virt-export [name…]  export Incus instances to the library (what its cron line calls)
  docker-update <id>   run one image-update schedule (what its cron line calls)
  user-rm <user>       remove an account and sign it out everywhere
  check                verify the config and state load, then exit
@@ -80,10 +83,16 @@ func main() {
 	switch cmd { // commands that don't read the config
 	case "fs": // privileged helper for the Files tab (run as root by the daemon)
 		os.Exit(files.Helper(flag.Args()[1:], os.Stdin, os.Stdout, os.Stderr))
+	case "thumb": // privileged helper for the Files tab's previews in root mode (run as root by the daemon)
+		os.Exit(media.Helper(flag.Args()[1:], os.Stdin, os.Stdout, os.Stderr))
+	case "run-ffmpeg": // privileged helper for playback in root mode: ffmpeg as root, ending when stdin closes
+		os.Exit(media.RunFFmpegHelper(flag.Args()[1:], os.Stdin, os.Stderr))
 	case "space-walk": // helper for the Space tab: measure mountpoints, stream the tree back
 		os.Exit(space.Helper(flag.Args()[1:], os.Stdin, os.Stdout, os.Stderr))
 	case "drm-clients": // privileged helper for the GPU readings: who has the GPU open (run as root by the daemon)
 		os.Exit(metrics.DRMClientsHelper(os.Stdin, os.Stdout))
+	case "cpu-energy": // privileged helper for the CPU power reading: the packages' energy counters (run as root by the daemon)
+		os.Exit(metrics.CPUEnergyHelper(os.Stdin, os.Stdout))
 	case "install", "uninstall":
 		var err error
 		if cmd == "install" {
@@ -143,6 +152,10 @@ func main() {
 		if err := zfsSnapshot(cfg, flag.Arg(1)); err != nil {
 			log.Fatal(err)
 		}
+	case "virt-export": // the nightly cron line from the Virtualization tab; optional instance names
+		if err := virtExport(cfg, flag.Args()[1:]); err != nil {
+			log.Fatal(err)
+		}
 	case "users":
 		migrateUsers(cfg)
 		if len(cfg.Users) == 0 {
@@ -293,6 +306,21 @@ func zfsSnapshot(cfg *config.Config, id string) error {
 	return nil
 }

+// virtExport runs the instance exports the Virtualization tab scheduled, as the account Ham
+// Lab runs as (which is in incus-admin), and records the run beside the data.
+func virtExport(cfg *config.Config, names []string) error {
+	who := os.Getenv("USER")
+	if u, err := user.Current(); err == nil && u.Username != "" {
+		who = u.Username
+	}
+	run := incus.New(cfg.DataDir(), who, version).RunExports(context.Background(), names, func(l string) { fmt.Println(l) })
+	fmt.Printf("exported %d, pruned %d, %.0f s\n", len(run.Exported), len(run.Pruned), run.Seconds)
+	if len(run.Errors) > 0 {
+		return errors.New(strings.Join(run.Errors, "; "))
+	}
+	return nil
+}
+
 func migrateUsers(cfg *config.Config) {
 	name := os.Getenv("USER")
 	if u, err := user.Current(); err == nil && u.Username != "" {
@@ -5,6 +5,7 @@ go 1.26.0
 require (
 	github.com/coder/websocket v1.8.15
 	github.com/creack/pty v1.1.24
+	go.etcd.io/bbolt v1.5.0
 	golang.org/x/crypto v0.57.0
 	golang.org/x/term v0.46.0
 )
@@ -2,9 +2,21 @@ github.com/coder/websocket v1.8.15 h1:6B2JPeOGlpff2Uz6vOEH1Vzpi0iUz20A+lPVhPHtNU
 github.com/coder/websocket v1.8.15/go.mod h1:NX3SzP+inril6yawo5CQXx8+fk145lPDC6pumgx0mVg=
 github.com/creack/pty v1.1.24 h1:bJrF4RRfyJnbTJqzRLHzcGaZK1NeM5kTC9jGgovnR1s=
 github.com/creack/pty v1.1.24/go.mod h1:08sCNb52WyoAwi2QDyzUCTgcvVFhUzewun7wtTfvcwE=
+github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
+github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
+github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
+go.etcd.io/bbolt v1.5.0 h1:S7GAl7Fxv12yohbwFfIbQCGDWbQbtDGPET4P/bD4lxU=
+go.etcd.io/bbolt v1.5.0/go.mod h1:mkltfYE5aUHQxUct9N9V+Kp7aSjFqjgrhcXIS70Lrdk=
 golang.org/x/crypto v0.57.0 h1:3ZVCjf8Ggz7zneR/EHRVx68Ctf+2pmIMP2UFhh9cC6M=
 golang.org/x/crypto v0.57.0/go.mod h1:Fdz0i5U6CoizGwLda9DttjSk6qlZo25zYNtR+ycvuZA=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
 golang.org/x/sys v0.48.0 h1:bbX/i/6MgT9BVLM9RT1thmxL04yeTAhbEz4SyadbXoo=
 golang.org/x/sys v0.48.0/go.mod h1:hNLxWAXmnKAxqDtdwIYC4bM9oQPEecfsnNMuSxOs3og=
 golang.org/x/term v0.46.0 h1:3+OXuTbaKDgwk8jTi3aSLHRlmWqHEUDUtxnbFigO4YE=
 golang.org/x/term v0.46.0/go.mod h1:+K02xbkittuwc0Am4abfA3Fc+XRGXkvBXNO88NCXPoc=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
@@ -71,6 +71,9 @@ type alertSaved struct {
 	Channels []AlertChannel `json:"channels"`
 	Events   []AlertEvent   `json:"events"`
 	Seeded   bool           `json:"seeded"`
+	// SawInstanceRule marks that the instance-down default has been offered once; set so that
+	// removing it stays removed.
+	SawInstanceRule bool `json:"saw_instance_rule,omitempty"`
 	// Firing is what was firing when the hub last looked, so a restart (every deploy is one)
 	// carries on where it was and doesn't announce the same alerts all over again.
 	Firing map[string]alertKept `json:"firing,omitempty"`
@@ -102,6 +105,7 @@ var defaultRules = []AlertRule{
 	{ID: "machine-offline", Name: "Machine not answering", Sensor: "hamlab.reachable", Op: "==", Value: false, ForSec: 120, Severity: "crit", Enabled: true},
 	{ID: "container-down", Name: "Container down", Sensor: "container.*.down", Op: "==", Value: true, ForSec: 120, Severity: "crit", Enabled: true},
 	{ID: "container-unhealthy", Name: "Container unhealthy", Sensor: "container.*.health", Op: "==", Value: "unhealthy", ForSec: 180, Severity: "warn", Enabled: true},
+	{ID: "instance-down", Name: "VM or container down", Sensor: "instance.*.down", Op: "==", Value: true, ForSec: 120, Severity: "crit", Enabled: true},
 	{ID: "service-failed", Name: "A service has failed", Sensor: "services.failed", Op: ">", Value: 0.0, ForSec: 300, Severity: "warn", Enabled: true},
 	{ID: "disk-full", Name: "Filesystem nearly full", Sensor: "fs.*.used_pct", Op: ">=", Value: 90.0, ForSec: 300, Severity: "warn", Enabled: true},
 	{ID: "pool-unhealthy", Name: "ZFS pool not healthy", Sensor: "zfs.*.healthy", Op: "==", Value: false, ForSec: 60, Severity: "crit", Enabled: true},
@@ -122,6 +126,23 @@ func newAlertEngine(s *Server) *alertEngine {
 	for key, k := range e.saved.Firing {
 		e.state[key] = &alertState{pending: time.UnixMilli(k.Since), firing: true, since: time.UnixMilli(k.Since), value: k.Value}
 	}
+	// a default added after an install was seeded joins its rules once; removing it afterwards sticks
+	if e.saved.Seeded && !e.saved.SawInstanceRule {
+		has := false
+		for _, r := range e.saved.Rules {
+			if r.ID == "instance-down" {
+				has = true
+			}
+		}
+		if !has {
+			for _, d := range defaultRules {
+				if d.ID == "instance-down" {
+					e.saved.Rules = append(e.saved.Rules, d)
+				}
+			}
+		}
+		e.saved.SawInstanceRule = true
+	}
 	for i, r := range e.saved.Rules { // the first day's default watched "not running", which a container stopped on purpose also is
 		if r.ID == "container-down" && r.Sensor == "container.*.running" {
 			e.saved.Rules[i].Name, e.saved.Rules[i].Sensor, e.saved.Rules[i].Value = "Container down", "container.*.down", true
@@ -343,6 +343,21 @@ func (s *Server) dockerLogs(w http.ResponseWriter, r *http.Request) {
 }

 // dockerInspect is the parts of `docker inspect` worth reading on a phone.
+// dockerErr answers for a docker command that failed: a thing that isn't there is a 404,
+// the daemon being away a 503, anything else a 500.
+func dockerErr(w http.ResponseWriter, err error) {
+	msg := strings.TrimSpace(strings.TrimPrefix(strings.TrimSpace(err.Error()), "error: "))
+	low := strings.ToLower(msg)
+	switch {
+	case strings.Contains(low, "no such object") || strings.Contains(low, "no such container") || strings.Contains(low, "not found"):
+		jsonErr(w, 404, msg)
+	case strings.Contains(low, "cannot connect to the docker daemon") || strings.Contains(low, "is the docker daemon running"):
+		jsonErr(w, 503, msg)
+	default:
+		jsonErr(w, 500, msg)
+	}
+}
+
 func (s *Server) dockerInspect(w http.ResponseWriter, r *http.Request) {
 	id := r.PathValue("id")
 	if !dockerRef.MatchString(id) {
@@ -352,9 +367,13 @@ func (s *Server) dockerInspect(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 15*time.Second)
 	defer cancel()
 	out, err := dockerRun(ctx, "inspect", id)
+	if err != nil {
+		dockerErr(w, err)
+		return
+	}
 	var all []map[string]any
-	if err != nil || json.Unmarshal(out, &all) != nil || len(all) == 0 {
-		jsonErr(w, 500, fmt.Sprint("inspect failed: ", err))
+	if json.Unmarshal(out, &all) != nil || len(all) == 0 {
+		jsonErr(w, 500, "inspect: unreadable answer")
 		return
 	}
 	c := all[0]
@@ -486,7 +505,7 @@ func (s *Server) dockerHealth(w http.ResponseWriter, r *http.Request) {
 	defer cancel()
 	out, err := dockerRun(ctx, "inspect", "--format", "{{json .State}}", id)
 	if err != nil {
-		jsonErr(w, 500, err.Error())
+		dockerErr(w, err)
 		return
 	}
 	var st struct {
@@ -55,11 +55,14 @@ type composeSpec struct {
 	Project string   `json:"project"`
 	Files   []string `json:"files"`
 	Via     string   `json:"via,omitempty"`
+	// Remote is read but never written: schedules made before v0.2 could point compose at
+	// another machine's Docker over tcp. Such a job is refused rather than run against this
+	// machine's Docker, which is where it would land without the variable.
 	Remote string `json:"remote,omitempty"`
 }

 func (c composeSpec) toSpec(tool string) compose.Spec {
-	return compose.Spec{Project: c.Project, Files: c.Files, Via: c.Via, Remote: c.Remote, Tool: tool}
+	return compose.Spec{Project: c.Project, Files: c.Files, Via: c.Via, Tool: tool}
 }

 const dockerCronFile = "/etc/cron.d/hamlab-docker"
@@ -169,6 +172,9 @@ func RunUpdate(ctx context.Context, db *store.Store, j UpdateJob, tool string) (
 	if len(j.Spec.Files) == 0 {
 		return "", errors.New("this schedule has no compose file recorded — open it in the Docker tab and save it again")
 	}
+	if j.Spec.Remote != "" {
+		return "", errors.New("this schedule was made to deploy to another machine over tcp, which this console no longer does — make it again on that machine")
+	}
 	spec := repoint(ctx, db, j.Spec.toSpec(tool))
 	var log strings.Builder
 	run := func(args ...string) error {
@@ -238,7 +244,7 @@ func (s *Server) dsPut(w http.ResponseWriter, r *http.Request) {
 			// seenFiles is the list as compose itself sees it: host paths normally, the
 			// orchestrator container's own paths when compose runs inside one. Getting this
 			// backwards gives a cron line that works from the console and fails at 3am.
-			j.Spec = composeSpec{Project: st.Name, Files: seenFiles(st, -1, ""), Via: st.Via, Remote: st.Remote}
+			j.Spec = composeSpec{Project: st.Name, Files: seenFiles(st, -1, ""), Via: st.Via}
 			if len(j.Spec.Files) == 0 {
 				jsonErr(w, 409, "that stack's compose file isn't anywhere this console can reach")
 				return
@@ -0,0 +1,123 @@
+package api
+
+import (
+	"bytes"
+	"errors"
+	"net/http/httptest"
+	"net/url"
+	"os"
+	"path/filepath"
+	"testing"
+
+	"hamlab/internal/files"
+)
+
+// A file read answers Range requests — what a <video> needs to seek — and HEAD, through
+// the same handler that streams everything else.
+func TestFilesReadRanges(t *testing.T) {
+	dir := t.TempDir()
+	p := filepath.Join(dir, "clip.mp4")
+	data := make([]byte, 10000)
+	for i := range data {
+		data[i] = byte(i % 251)
+	}
+	if err := os.WriteFile(p, data, 0o644); err != nil {
+		t.Fatal(err)
+	}
+	s := &Server{fsLocal: files.Local{}}
+	get := func(method, extra string, hdr map[string]string) *httptest.ResponseRecorder {
+		r := httptest.NewRequest(method, "/api/files/read?path="+url.QueryEscape(p)+extra, nil)
+		for k, v := range hdr {
+			r.Header.Set(k, v)
+		}
+		w := httptest.NewRecorder()
+		s.filesRead(w, r)
+		return w
+	}
+	w := get("GET", "", nil)
+	if w.Code != 200 || w.Body.Len() != 10000 || w.Header().Get("Content-Type") != "video/mp4" || w.Header().Get("Accept-Ranges") != "bytes" {
+		t.Fatalf("whole: %d %d %q %q", w.Code, w.Body.Len(), w.Header().Get("Content-Type"), w.Header().Get("Accept-Ranges"))
+	}
+	w = get("GET", "", map[string]string{"Range": "bytes=100-199"})
+	if w.Code != 206 || w.Header().Get("Content-Range") != "bytes 100-199/10000" || w.Body.Len() != 100 || w.Body.Bytes()[0] != data[100] {
+		t.Fatalf("range: %d %q %d", w.Code, w.Header().Get("Content-Range"), w.Body.Len())
+	}
+	w = get("GET", "", map[string]string{"Range": "bytes=9990-"})
+	if w.Code != 206 || w.Body.Len() != 10 || w.Body.Bytes()[9] != data[9999] {
+		t.Fatalf("tail range: %d %d", w.Code, w.Body.Len())
+	}
+	w = get("HEAD", "", nil)
+	if w.Code != 200 || w.Body.Len() != 0 || w.Header().Get("Content-Length") != "10000" {
+		t.Fatalf("head: %d %d %q", w.Code, w.Body.Len(), w.Header().Get("Content-Length"))
+	}
+	if w := get("GET", "&max=50", nil); w.Code != 413 {
+		t.Fatalf("the editor's cap: %d", w.Code)
+	}
+	if w := get("GET", "", map[string]string{"Range": "bytes=20000-"}); w.Code != 416 {
+		t.Fatalf("a range past the end: %d", w.Code)
+	}
+	if err := os.Chmod(p, 0); err == nil && os.Geteuid() != 0 {
+		if w := get("GET", "", nil); w.Code != 403 {
+			t.Fatalf("unreadable: %d", w.Code)
+		}
+	}
+}
+
+// A write over the cap is refused whole: the file is not truncated first.
+func TestFilesWriteCap(t *testing.T) {
+	p := filepath.Join(t.TempDir(), "f.txt")
+	if err := os.WriteFile(p, []byte("keep me"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	s := &Server{fsLocal: files.Local{}}
+	body := make([]byte, 8<<20+1)
+	r := httptest.NewRequest("PUT", "/api/files/write?path="+url.QueryEscape(p), bytes.NewReader(body))
+	w := httptest.NewRecorder()
+	s.filesWrite(w, r)
+	if w.Code != 413 {
+		t.Fatalf("got %d", w.Code)
+	}
+	if b, _ := os.ReadFile(p); string(b) != "keep me" {
+		t.Fatalf("the file was touched: %q", b)
+	}
+	r = httptest.NewRequest("PUT", "/api/files/write?path="+url.QueryEscape(p), bytes.NewReader([]byte("new")))
+	w = httptest.NewRecorder()
+	s.filesWrite(w, r)
+	if b, _ := os.ReadFile(p); w.Code != 204 || string(b) != "new" {
+		t.Fatalf("a write within the cap: %d %q", w.Code, b)
+	}
+}
+
+// A link to nothing is a 404, not an empty 200.
+func TestFilesReadDanglingLink(t *testing.T) {
+	dir := t.TempDir()
+	l := filepath.Join(dir, "broken")
+	if err := os.Symlink("nowhere", l); err != nil {
+		t.Fatal(err)
+	}
+	s := &Server{fsLocal: files.Local{}}
+	r := httptest.NewRequest("GET", "/api/files/read?path="+url.QueryEscape(l), nil)
+	w := httptest.NewRecorder()
+	s.filesRead(w, r)
+	if w.Code != 404 {
+		t.Fatalf("got %d: %s", w.Code, w.Body.String())
+	}
+}
+
+// dockerErr tells a thing that isn't there from a daemon that isn't up from anything else.
+func TestDockerErr(t *testing.T) {
+	for _, c := range []struct {
+		msg  string
+		want int
+	}{
+		{"error: No such object: zzz", 404}, {"Error response from daemon: No such container: x", 404},
+		{"Cannot connect to the Docker daemon at unix:///var/run/docker.sock. Is the docker daemon running?", 503},
+		{"something else entirely", 500},
+	} {
+		w := httptest.NewRecorder()
+		dockerErr(w, errors.New(c.msg))
+		if w.Code != c.want {
+			t.Errorf("%q → %d, want %d", c.msg, w.Code, c.want)
+		}
+	}
+}
@@ -338,20 +338,6 @@ func (s *Server) listKVMs(w http.ResponseWriter, _ *http.Request) {
 	jsonOK(w, 200, out)
 }

-// kvmForMachine is the KVM attached to a machine, "" being the hub itself.
-func (s *Server) kvmForMachine(machine string) (config.KVM, bool) {
-	var found config.KVM
-	ok := false
-	s.cfg.View(func(c *config.Config) {
-		for _, k := range c.KVMs {
-			if k.Machine == machine {
-				found, ok = k, true
-			}
-		}
-	})
-	return found, ok
-}
-
 func (s *Server) addKVM(w http.ResponseWriter, r *http.Request) {
 	var body struct{ Name, URL, Machine string }
 	if err := json.NewDecoder(io.LimitReader(r.Body, 4096)).Decode(&body); err != nil {
@@ -0,0 +1,169 @@
+package api
+
+// Playing a video the browser cannot play as it is: POST /api/files/play starts an HLS
+// re-encode on this machine (internal/media), GET …/play/{id}/index.m3u8 and the segments
+// feed the player, GET …/play/{id} is its progress, DELETE ends it. /api/files/play-caps
+// says which codecs this machine can make and on what. Root mode (?sudo=1) reads the file
+// and runs ffmpeg as root, through the same sudo the file reads use.
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"io"
+	"log"
+	"net/http"
+	"path/filepath"
+	"strings"
+	"time"
+
+	"hamlab/internal/files"
+	"hamlab/internal/media"
+)
+
+const playLimit = 3 // re-encodes at once on one machine; a GPU does two or three, a CPU one
+
+type playCaps struct {
+	Codecs    []playCodec     `json:"codecs"`
+	Qualities []media.Quality `json:"qualities"`
+	Error     string          `json:"error,omitempty"`
+}
+
+type playCodec struct {
+	media.Codec
+	Engine string `json:"engine,omitempty"` // "" when nothing here encodes it
+}
+
+// playCapsHandler: GET /api/files/play-caps[?sudo=1]
+func (s *Server) playCapsHandler(w http.ResponseWriter, r *http.Request) {
+	root := r.URL.Query().Get("sudo") == "1"
+	if root && s.fsSudo == nil {
+		jsonErr(w, 403, "root access needs passwordless sudo on the host")
+		return
+	}
+	caps, err := s.thumbs.capsFor(r.Context(), root, false)
+	pc := playCaps{Codecs: []playCodec{}, Qualities: media.Qualities}
+	if err != nil {
+		pc.Error = err.Error()
+	} else if caps.Error != "" {
+		pc.Error = caps.Error
+	}
+	for _, c := range media.Codecs {
+		x := playCodec{Codec: c}
+		if pc.Error == "" {
+			x.Engine = media.EngineFor(caps, c.ID)
+		}
+		pc.Codecs = append(pc.Codecs, x)
+	}
+	jsonOK(w, 200, pc)
+}
+
+// playStart: POST /api/files/play[?sudo=1] {path, codec, quality}
+func (s *Server) playStart(w http.ResponseWriter, r *http.Request) {
+	fsys, ok := s.fsFor(w, r)
+	if !ok {
+		return
+	}
+	root := r.URL.Query().Get("sudo") == "1"
+	var body struct{ Path, Codec, Quality string }
+	if err := json.NewDecoder(io.LimitReader(r.Body, 64<<10)).Decode(&body); err != nil {
+		jsonErr(w, 400, "bad request")
+		return
+	}
+	p, err := files.Clean(body.Path)
+	if err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	if media.Kind(p) != "video" {
+		jsonErr(w, 415, "not a video")
+		return
+	}
+	if err := media.ValidChoice(body.Codec, body.Quality); err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	if _, err := fsys.Stat(r.Context(), p); err != nil {
+		fsErr(w, err)
+		return
+	}
+	caps, err := s.thumbs.capsFor(r.Context(), root, false)
+	if err != nil {
+		jsonErr(w, 503, err.Error())
+		return
+	}
+	if caps.Error != "" {
+		jsonErr(w, 503, caps.Error)
+		return
+	}
+	ictx, cancel := context.WithTimeout(r.Context(), 30*time.Second)
+	src, err := media.Inspect(ictx, caps, p, root)
+	cancel()
+	if err != nil {
+		playErr(w, err)
+		return
+	}
+	st, err := s.plays.Open(r.Context(), caps, root, p, body.Codec, body.Quality, src)
+	if err != nil {
+		playErr(w, err)
+		return
+	}
+	log.Printf("files: play %s as %s %s on %s (from %s)", p, st.Codec, st.Quality, st.Engine, clientIP(r))
+	jsonOK(w, 200, map[string]any{"stream": st, "url": "/api/files/play/" + st.ID + "/index.m3u8"})
+}
+
+func playErr(w http.ResponseWriter, err error) {
+	var de *media.DecodeError
+	switch {
+	case errors.As(err, &de):
+		jsonErr(w, 422, de.Msg)
+	case strings.Contains(err.Error(), "already being re-encoded"):
+		jsonErr(w, 429, err.Error())
+	case strings.HasPrefix(err.Error(), "unknown ") || strings.HasPrefix(err.Error(), "nothing on this machine encodes"):
+		jsonErr(w, 400, err.Error())
+	case errors.Is(err, context.DeadlineExceeded):
+		jsonErr(w, 504, "the file took too long to read")
+	default:
+		jsonErr(w, 500, err.Error())
+	}
+}
+
+// playStatus: GET /api/files/play/{id}
+func (s *Server) playStatus(w http.ResponseWriter, r *http.Request) {
+	st, ok := s.plays.Find(r.PathValue("id"))
+	if !ok {
+		jsonErr(w, 404, "no such stream")
+		return
+	}
+	jsonOK(w, 200, st.Status())
+}
+
+// playStop: DELETE /api/files/play/{id}, or POST …/close — the form a page can send on its
+// way out (navigator.sendBeacon), so a phone closing the tab releases the machine at once.
+func (s *Server) playStop(w http.ResponseWriter, r *http.Request) {
+	s.plays.Close(r.PathValue("id"))
+	w.WriteHeader(204)
+}
+
+// playFile: GET /api/files/play/{id}/{file} — the playlist, the init segment, a segment.
+func (s *Server) playFile(w http.ResponseWriter, r *http.Request) {
+	st, ok := s.plays.Find(r.PathValue("id"))
+	if !ok {
+		jsonErr(w, 404, "no such stream")
+		return
+	}
+	p, ok := st.File(r.PathValue("file"))
+	if !ok {
+		jsonErr(w, 404, "not a stream file")
+		return
+	}
+	switch filepath.Ext(p) {
+	case ".m3u8":
+		w.Header().Set("Content-Type", "application/vnd.apple.mpegurl")
+	default:
+		w.Header().Set("Content-Type", "video/mp4")
+	}
+	w.Header().Set("Cache-Control", "no-store")
+	w.Header().Set("X-Content-Type-Options", "nosniff")
+	http.ServeFile(w, r, p)
+}
@@ -35,6 +35,7 @@ import (
 	"hamlab/internal/files"
 	"hamlab/internal/hardware"
 	"hamlab/internal/incus"
+	"hamlab/internal/media"
 	"hamlab/internal/metrics"
 	"hamlab/internal/network"
 	"hamlab/internal/nodes"
@@ -79,6 +80,9 @@ type Server struct {
 	virt        *incus.Manager
 	fsLocal     files.FS
 	fsSudo      files.FS // nil without passwordless sudo
+	thumbs      *thumbSvc
+	plays       *media.Streamer
+	self        string // this binary, for helpers run as tasks
 	nodes       *nodes.Manager
 	fingerprint string
 	version     string
@@ -98,7 +102,10 @@ func New(cfg *config.Config, sessions *auth.Sessions, mgr *term.Manager, col *me
 	if err != nil {
 		self = "hamlab"
 	}
+	s.self = self
 	s.space = space.New(self, filepath.Join(cfg.DataDir(), "space"))
+	s.thumbs = newThumbSvc(cfg.DataDir(), self)
+	s.plays = media.NewStreamer(cfg.DataDir(), self, playLimit)
 	s.hostName() // read it once now so the first request doesn't have to
 	if u, err := user.Current(); err == nil && u.Username != "" {
 		s.user = u.Username
@@ -220,20 +227,8 @@ func (s *Server) routes() *http.ServeMux {
 	m.HandleFunc("PUT /api/docker/schedules", s.auth(s.dsPut))
 	m.HandleFunc("DELETE /api/docker/schedules/{id}", s.auth(s.dsDelete))
 	m.HandleFunc("POST /api/docker/schedules/{id}/run", s.auth(s.dsRun))
-	m.HandleFunc("GET /api/nodes/{node}/docker/updates", s.auth(s.machineUpdates))
-	// The same, asked of a node through this hub: the hub answers for the stacks whose files
-	// it holds (deployed to the node over tcp) and passes everything else to the node.
-	m.HandleFunc("GET /api/nodes/{node}/docker/stacks", s.auth(s.stacksList))
-	m.HandleFunc("POST /api/nodes/{node}/docker/stacks", s.auth(s.stackCreate))
-	m.HandleFunc("GET /api/nodes/{node}/docker/stacks/homes", s.auth(s.stackHomes))
-	m.HandleFunc("POST /api/nodes/{node}/docker/stacks/{name}/delete", s.auth(s.stackDelete))
-	m.HandleFunc("GET /api/nodes/{node}/docker/stacks/{name}", s.auth(s.stackFile))
-	m.HandleFunc("PUT /api/nodes/{node}/docker/stacks/{name}", s.auth(s.stackSave))
-	m.HandleFunc("GET /api/nodes/{node}/docker/stacks/{name}/diff", s.auth(s.stackDiff))
-	m.HandleFunc("GET /api/nodes/{node}/docker/stacks/{name}/updates", s.auth(s.stackUpdates))
-	m.HandleFunc("POST /api/nodes/{node}/docker/stacks/{name}/{action}", s.auth(s.stackAction))
-	m.HandleFunc("GET /api/nodes/{node}/tasks/{id}", s.auth(s.taskOnHub(s.getTask)))
-	m.HandleFunc("GET /api/nodes/{node}/tasks/{id}/stream", s.auth(s.taskOnHub(s.streamTask)))
+	// Asked of a node through this hub, every one of these is the node's to answer: the
+	// generic /api/nodes/{name}/{rest...} proxy above carries them there unchanged.
 	m.HandleFunc("POST /api/docker/containers/{id}/{action}", s.auth(s.dockerAction))
 	m.HandleFunc("GET /api/docker/containers/{id}/logs", s.auth(s.dockerLogs))
 	m.HandleFunc("GET /api/docker/containers/{id}/logs/tail", s.auth(s.dockerTail))
@@ -255,7 +250,24 @@ func (s *Server) routes() *http.ServeMux {
 	m.HandleFunc("PUT /api/virt/instances/{name}/config", s.auth(s.virtConfig))
 	m.HandleFunc("POST /api/virt/instances/{name}/snapshots", s.auth(s.virtSnapshotCreate))
 	m.HandleFunc("POST /api/virt/instances/{name}/snapshots/{snap}/{action}", s.auth(s.virtSnapshotAction))
+	m.HandleFunc("POST /api/virt/instances/from-iso", s.auth(s.virtFromISO))
+	m.HandleFunc("GET /api/virt/instances/{name}/vga", s.auth(s.virtVGA))
+	m.HandleFunc("POST /api/virt/instances/{name}/iso", s.auth(s.virtISOAttach))
+	m.HandleFunc("POST /api/virt/instances/{name}/iso/detach", s.auth(s.virtISODetach))
+	m.HandleFunc("POST /api/virt/instances/{name}/mounts", s.auth(s.virtMountAdd))
+	m.HandleFunc("POST /api/virt/instances/{name}/mounts/remove", s.auth(s.virtMountRemove))
 	m.HandleFunc("POST /api/virt/instances/{name}/{action}", s.auth(s.virtAction))
+	m.HandleFunc("POST /api/virt/isos/fetch", s.auth(s.virtISOFetch))
+	m.HandleFunc("POST /api/virt/isos/import", s.auth(s.virtISOImport))
+	m.HandleFunc("POST /api/virt/isos/delete", s.auth(s.virtISODelete))
+	m.HandleFunc("POST /api/virt/isos/rename", s.auth(s.virtISORename))
+	m.HandleFunc("GET /api/virt/exports", s.auth(s.virtExports))
+	m.HandleFunc("PUT /api/virt/exports", s.auth(s.virtExportsPut))
+	m.HandleFunc("POST /api/virt/exports/run", s.auth(s.virtExportsRun))
+	m.HandleFunc("POST /api/virt/exports/delete", s.auth(s.virtExportDelete))
+	m.HandleFunc("GET /api/virt/sshkeys", s.auth(s.virtSSHKeys))
+	m.HandleFunc("POST /api/virt/pools", s.auth(s.virtPoolCreate))
+	m.HandleFunc("POST /api/virt/pools/delete", s.auth(s.virtPoolDelete))
 	m.HandleFunc("GET /api/alerts", s.auth(s.alertsGet))
 	m.HandleFunc("PUT /api/alerts", s.auth(s.alertsPut))
 	m.HandleFunc("POST /api/alerts/test", s.auth(s.alertsTest))
@@ -294,8 +306,19 @@ func (s *Server) routes() *http.ServeMux {
 	m.HandleFunc("POST /api/files/mkdir", s.auth(s.filesMkdir))
 	m.HandleFunc("POST /api/files/touch", s.auth(s.filesTouch))
 	m.HandleFunc("POST /api/files/rename", s.auth(s.filesRename))
+	m.HandleFunc("POST /api/files/move", s.auth(s.filesMove))
 	m.HandleFunc("POST /api/files/delete", s.auth(s.filesDelete))
 	m.HandleFunc("POST /api/files/chmod", s.auth(s.filesChmod))
+	m.HandleFunc("GET /api/files/thumb", s.auth(s.filesThumb))
+	m.HandleFunc("GET /api/files/thumbs", s.auth(s.thumbsStatus))
+	m.HandleFunc("POST /api/files/thumbs/install", s.auth(s.thumbsInstall))
+	m.HandleFunc("POST /api/files/thumbs/gpu-access", s.auth(s.thumbsGPUAccess))
+	m.HandleFunc("GET /api/files/play-caps", s.auth(s.playCapsHandler))
+	m.HandleFunc("POST /api/files/play", s.auth(s.playStart))
+	m.HandleFunc("GET /api/files/play/{id}", s.auth(s.playStatus))
+	m.HandleFunc("DELETE /api/files/play/{id}", s.auth(s.playStop))
+	m.HandleFunc("POST /api/files/play/{id}/close", s.auth(s.playStop))
+	m.HandleFunc("GET /api/files/play/{id}/{file}", s.auth(s.playFile))
 	m.HandleFunc("GET /api/hardware", s.auth(s.hardwareReport))
 	m.HandleFunc("GET /api/network", s.auth(s.networkOverview))
 	m.HandleFunc("GET /api/vpn", s.auth(s.vpnReport))
@@ -945,11 +968,7 @@ func (s *Server) updateAllMachines(w http.ResponseWriter, r *http.Request) {
 }

 func (s *Server) proxyNode(w http.ResponseWriter, r *http.Request) {
-	node := r.PathValue("node") // routes that also carry a {name} of their own call the machine {node}
-	if node == "" {
-		node = r.PathValue("name")
-	}
-	p, ok := s.nodes.Proxy(node)
+	p, ok := s.nodes.Proxy(r.PathValue("name"))
 	if !ok {
 		jsonErr(w, 404, "no such machine")
 		return
@@ -1913,21 +1932,15 @@ func (s *Server) filesRead(w http.ResponseWriter, r *http.Request) {
 		jsonErr(w, 400, "not a regular file (device, pipe or socket)")
 		return
 	}
+	if in.Broken {
+		jsonErr(w, 404, "a link to nothing: "+in.Target)
+		return
+	}
 	mx, _ := strconv.ParseInt(r.URL.Query().Get("max"), 10, 64)
 	if mx > 0 && in.Size > mx {
 		jsonErr(w, 413, "file too large")
 		return
 	}
-	f, err := fsys.Open(r.Context(), p)
-	if err != nil {
-		fsErr(w, err)
-		return
-	}
-	defer f.Close()
-	var body io.Reader = f
-	if mx > 0 { // stat can lie (size 0 on /proc); the cap must hold on the bytes actually sent
-		body = io.LimitReader(f, mx+1)
-	}
 	name := filepath.Base(p)
 	ct := mime.TypeByExtension(filepath.Ext(name))
 	if ct == "" {
@@ -1946,7 +1959,28 @@ func (s *Server) filesRead(w http.ResponseWriter, r *http.Request) {
 		w.Header().Set("Content-Disposition", "inline; filename*=UTF-8''"+url.PathEscape(name))
 	}
 	if in.Size > 0 && mx == 0 {
-		w.Header().Set("Content-Length", strconv.FormatInt(in.Size, 10))
+		// A real file of known size goes through net/http, which speaks Range: a video player
+		// can seek and a download can resume. /proc files say size 0 and take the plain path.
+		rs := files.NewSeeker(r.Context(), fsys, p, in.Size)
+		defer rs.Close()
+		if _, local := fsys.(files.Local); local { // cheap here, and turns "can't open" into a status rather than a cut-off body
+			if err := rs.Check(); err != nil {
+				fsErr(w, err)
+				return
+			}
+		}
+		http.ServeContent(w, r, name, time.UnixMilli(in.Mtime), rs)
+		return
+	}
+	f, err := fsys.Open(r.Context(), p)
+	if err != nil {
+		fsErr(w, err)
+		return
+	}
+	defer f.Close()
+	var body io.Reader = f
+	if mx > 0 { // stat can lie (size 0 on /proc); the cap must hold on the bytes actually sent
+		body = io.LimitReader(f, mx+1)
 	}
 	_, _ = io.Copy(w, body)
 }
@@ -1960,7 +1994,14 @@ func (s *Server) filesWrite(w http.ResponseWriter, r *http.Request) {
 	if !ok {
 		return
 	}
-	if err := fsys.Write(r.Context(), p, io.LimitReader(r.Body, 8<<20)); err != nil {
+	// Whole in memory first: the write truncates the file, so a body over the cap must be
+	// refused before that, not cut short after it.
+	body, err := io.ReadAll(http.MaxBytesReader(w, r.Body, 8<<20))
+	if err != nil {
+		jsonErr(w, 413, "too large to save here (8 MiB at most)")
+		return
+	}
+	if err := fsys.Write(r.Context(), p, bytes.NewReader(body)); err != nil {
 		fsErr(w, err)
 		return
 	}
@@ -2047,6 +2088,63 @@ func (s *Server) filesRename(w http.ResponseWriter, r *http.Request) {
 	})
 }

+// filesMove: POST {path, to} — to is the full destination path. A rename when the two
+// ends share a filesystem (204); otherwise the copy-and-remove runs as a task (202 with the
+// task), since a folder between datasets can take as long as it takes.
+func (s *Server) filesMove(w http.ResponseWriter, r *http.Request) {
+	fsys, ok := s.fsFor(w, r)
+	if !ok {
+		return
+	}
+	var body struct{ Path, To string }
+	if err := json.NewDecoder(io.LimitReader(r.Body, 64<<10)).Decode(&body); err != nil {
+		jsonErr(w, 400, "bad request")
+		return
+	}
+	from, err := files.Clean(body.Path)
+	if err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	to, err := files.Clean(body.To)
+	if err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	if from == to {
+		jsonErr(w, 400, "it is already there")
+		return
+	}
+	if files.Inside(from, to) {
+		jsonErr(w, 400, "a folder can't be moved into itself")
+		return
+	}
+	// The kernel answers EXDEV for two paths on different filesystems before it looks for
+	// the source, so a missing file would otherwise become a task that fails on arrival.
+	if _, err := fsys.Stat(r.Context(), from); err != nil {
+		fsErr(w, err)
+		return
+	}
+	err = fsys.Rename(r.Context(), from, to)
+	if err == nil {
+		log.Printf("files: move %s -> %s (from %s)", from, to, clientIP(r))
+		w.WriteHeader(204)
+		return
+	}
+	if !files.IsCrossDevice(err) {
+		fsErr(w, err)
+		return
+	}
+	cmd := files.MoveCmd(context.Background(), fsys, s.self, from, to)
+	t, err := s.tasks.Start("files:move", "move "+filepath.Base(from)+" to "+filepath.Dir(to), cmd)
+	if err != nil {
+		jsonErr(w, 500, err.Error())
+		return
+	}
+	log.Printf("files: move %s -> %s across filesystems as task %s (from %s)", from, to, t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
+
 func (s *Server) filesDelete(w http.ResponseWriter, r *http.Request) {
 	s.filesOp(w, r, func(fsys files.FS, body map[string]any, p string) error {
 		rec, _ := body["recursive"].(bool)
@@ -18,11 +18,10 @@ package api
 // machine would become unfindable at once. A remembered mount resolves with no container to
 // run in, which is right: compose runs on the host against the host's copy of the file.
 //
-// A stack can also be deployed *from another machine*: Dockhand on the hub drives a node's
-// Docker over tcp, so the node runs the containers and the hub holds the files. The node
-// alone can only list such a stack read-only. The hub, asked about one of its nodes, fills
-// in what the node couldn't (hubStacks): it resolves the files on itself and runs compose
-// here with DOCKER_HOST pointed at the node.
+// A stack is one machine's affair: its files and the Docker that runs it are on the same
+// box, and that box's Ham Lab is the only thing that touches either. Asked about a node's
+// stacks, a hub passes the request to the node's own Ham Lab and relays the answer; it holds
+// no files for anyone else and never points compose at another machine's Docker.

 import (
 	"bytes"
@@ -35,7 +34,6 @@ import (
 	"io"
 	"log"
 	"net/http"
-	"net/url"
 	"os"
 	"os/exec"
 	"path/filepath"
@@ -60,8 +58,6 @@ type stack struct {
 	Files      []string `json:"files"`      // every file it was deployed from, in order: -f a -f b
 	HostFiles  []string `json:"host_files"` // the same, on the machine that holds them
 	Via        string   `json:"via"`        // container compose runs inside; "" = on the host
-	Remote     string   `json:"remote"`     // DOCKER_HOST compose is pointed at; "" = this machine's Docker
-	HeldBy     string   `json:"held_by"`    // the machine holding the files, when it isn't the one running them
 	Editable   bool     `json:"editable"`
 	Note       string   `json:"note,omitempty"`
 	HasEnv     bool     `json:"has_env"`
@@ -282,7 +278,7 @@ func (s *Server) findStacks(ctx context.Context) ([]stack, error) {
 		st.resolve(maps)
 		stacks = append(stacks, *st)
 	}
-	stacks = append(stacks, scanHomes(ctx, s.homesOf(stacks, true), stacks)...)
+	stacks = append(stacks, scanHomes(ctx, s.homesOf(stacks), stacks)...)
 	sort.Slice(stacks, func(i, j int) bool { return stacks[i].Name < stacks[j].Name })
 	return stacks, nil
 }
@@ -290,19 +286,23 @@ func (s *Server) findStacks(ctx context.Context) ([]stack, error) {
 // ---- where stacks live ----

 // A home is a directory of stacks, one folder each: where new ones are made, and where ones
-// that aren't deployed (never were, or were taken down) are still found. Homes aren't
-// configured; they are wherever this machine's stacks already are. With none at all, ~/stacks.
+// that aren't deployed (never were, or were taken down) are still found. The default is
+// Ham Lab's own: <data dir>/stacks, which is where everything this console manages lives.
+// Any folder this machine already keeps stacks in — two or more deployed from it — is
+// offered as well, so what was deployed before Ham Lab arrived stays editable and gains
+// neighbours where it is, but it is never the default.
 type stackHome struct {
-	Dir     string `json:"dir"`     // on the machine that holds the files
+	Dir     string `json:"dir"`   // on this machine
 	Inner   string `json:"inner"` // the same directory as compose sees it (inside Via); Dir otherwise
 	Via     string `json:"via"`   // container compose runs inside
-	Remote  string `json:"remote"`  // DOCKER_HOST, when the containers run on another machine
-	HeldBy  string `json:"held_by"` // the machine holding the files, when it isn't the one running them
 	Stacks  int    `json:"stacks"`
 	Default bool   `json:"default"`
 }

-func (s *Server) homesOf(stacks []stack, withFallback bool) []stackHome {
+// stacksDir is the home Ham Lab owns.
+func (s *Server) stacksDir() string { return filepath.Join(s.cfg.DataDir(), "stacks") }
+
+func (s *Server) homesOf(stacks []stack) []stackHome {
 	type tally struct {
 		home     stackHome
 		deployed int
@@ -318,11 +318,10 @@ func (s *Server) homesOf(stacks []stack, withFallback bool) []stackHome {
 		if strings.Count(dir, "/") < 2 { // "/" or "/tmp": not somewhere to make folders in
 			continue
 		}
-		key := dir + "|" + st.Remote
-		t := by[key]
+		t := by[dir]
 		if t == nil {
-			t = &tally{home: stackHome{Dir: dir, Remote: st.Remote, HeldBy: st.HeldBy}, byVia: map[string]int{}, inner: map[string]string{}}
-			by[key] = t
+			t = &tally{home: stackHome{Dir: dir}, byVia: map[string]int{}, inner: map[string]string{}}
+			by[dir] = t
 		}
 		t.home.Stacks++
 		if len(st.Containers) > 0 {
@@ -335,11 +334,13 @@ func (s *Server) homesOf(stacks []stack, withFallback bool) []stackHome {
 		}
 	}
 	// A folder is a home when stacks are kept there as a habit: two or more deployed from it.
-	// One stack on its own (Dockhand's own compose file in ~/apps/dockhand) says nothing about
-	// where the next should go, and would have every compose file near it listed as a stack.
-	// New stacks are deployed the way most of their neighbours were.
-	var homes, lone []stackHome
-	for _, t := range by {
+	// One stack on its own (an orchestrator's own compose file in its app folder) says nothing
+	// about where the next should go, and would have every compose file near it listed as a
+	// stack — unless it is already in Ham Lab's folder. New stacks are deployed the way most
+	// of their neighbours were.
+	own := s.stacksDir()
+	var homes []stackHome
+	for dir, t := range by {
 		best, n := "", -1
 		for via, c := range t.byVia {
 			if c > n || (c == n && via > best) {
@@ -355,29 +356,23 @@ func (s *Server) homesOf(stacks []stack, withFallback bool) []stackHome {
 		if t.home.Inner == "" {
 			t.home.Inner = t.home.Dir
 		}
-		if t.deployed >= 2 {
+		if t.deployed >= 2 || dir == own {
 			homes = append(homes, t.home)
-		} else {
-			lone = append(lone, t.home)
 		}
 	}
-	if len(homes) == 0 {
-		homes = lone
-	}
 	sort.Slice(homes, func(i, j int) bool {
+		if (homes[i].Dir == own) != (homes[j].Dir == own) {
+			return homes[i].Dir == own
+		}
 		if homes[i].Stacks != homes[j].Stacks {
 			return homes[i].Stacks > homes[j].Stacks
 		}
 		return homes[i].Dir < homes[j].Dir
 	})
-	if len(homes) == 0 && withFallback {
-		if home, err := os.UserHomeDir(); err == nil {
-			homes = append(homes, stackHome{Dir: filepath.Join(home, "stacks"), Inner: filepath.Join(home, "stacks")})
+	if len(homes) == 0 || homes[0].Dir != own {
+		homes = append([]stackHome{{Dir: own, Inner: own}}, homes...)
 	}
-	}
-	if len(homes) > 0 {
 	homes[0].Default = true
-	}
 	return homes
 }

@@ -394,6 +389,9 @@ func scanHomes(ctx context.Context, homes []stackHome, known []stack) []stack {
 	}
 	var out []stack
 	for _, h := range homes {
+		if _, err := os.Stat(h.Dir); errors.Is(err, os.ErrNotExist) {
+			continue // Ham Lab's own home before its first stack: nothing to find, and no sudo to spend finding it
+		}
 		args := []string{h.Dir, "-mindepth", "2", "-maxdepth", "2", "-type", "f", "("}
 		for i, n := range composeNames {
 			if i > 0 {
@@ -417,7 +415,7 @@ func scanHomes(ctx context.Context, homes []stackHome, known []stack) []stack {
 				continue
 			}
 			have[name], have[dir] = true, true
-			st := stack{Name: name, Containers: []string{}, Images: []string{}, HostFiles: []string{f}, HostFile: f, Via: h.Via, Remote: h.Remote, HeldBy: h.HeldBy, Editable: true, Note: "not deployed"}
+			st := stack{Name: name, Containers: []string{}, Images: []string{}, HostFiles: []string{f}, HostFile: f, Via: h.Via, Editable: true, Note: "not deployed"}
 			st.Files = []string{filepath.Join(h.Inner, filepath.Base(dir), filepath.Base(f))}
 			st.File = st.Files[0]
 			st.HasEnv = readable(st.envPath())
@@ -436,114 +434,23 @@ func contains(list []string, s string) bool {
 	return false
 }

-// hubStacks is a node's stack list with the hub's help: what the node could not find is
-// looked for here, and if it is here — and the node's Docker answers over tcp, which is how
-// it was deployed in the first place — the stack becomes editable from this hub.
-func (s *Server) hubStacks(ctx context.Context, node string) ([]stack, error) {
-	code, b, err := s.nodes.Do(ctx, node, "GET", "/api/docker/stacks", nil, nil)
+// stackFor finds the stack a request means.
+func (s *Server) stackFor(ctx context.Context, r *http.Request) (stack, error) {
+	all, err := s.findStacks(ctx)
 	if err != nil {
-		return nil, err
-	}
-	var res struct{ Stacks []stack }
-	if code != 200 || json.Unmarshal(b, &res) != nil {
-		return nil, fmt.Errorf("%s answered %d", node, code)
-	}
-	remote, maps := "", []mountMap(nil)
-	for i := range res.Stacks {
-		st := &res.Stacks[i]
-		if st.Editable || len(st.Files) == 0 {
-			continue
-		}
-		if remote == "" {
-			remote, maps = s.nodeDocker(ctx, node), mountsFor(ctx, s.store)
-		}
-		if remote == "-" {
-			continue
-		}
-		note := st.Note
-		if st.resolve(maps); !st.Editable {
-			st.Note = note
-			continue
-		}
-		st.Remote, st.HeldBy = remote, s.hostName()
-	}
-	var held []stack
-	for _, st := range res.Stacks {
-		if st.HeldBy != "" {
-			held = append(held, st)
-		}
-	}
-	res.Stacks = append(res.Stacks, scanHomes(ctx, s.homesOf(held, false), res.Stacks)...)
-	sort.Slice(res.Stacks, func(i, j int) bool { return res.Stacks[i].Name < res.Stacks[j].Name })
-	return res.Stacks, nil
-}
-
-var (
-	nodeDockerMu sync.Mutex
-	nodeDockerOK = map[string]string{} // node → "tcp://host:2375", or "-" when it doesn't answer
-)
-
-// nodeDocker is the node's Docker endpoint as Dockhand-style deployments use it, if it answers.
-func (s *Server) nodeDocker(ctx context.Context, node string) string {
-	nodeDockerMu.Lock()
-	defer nodeDockerMu.Unlock()
-	if v, ok := nodeDockerOK[node]; ok && v != "-" {
-		return v
-	}
-	ep := "-"
-	for _, n := range s.nodes.List() {
-		if n.Name != node {
-			continue
-		}
-		if u, err := url.Parse(n.URL); err == nil && u.Hostname() != "" {
-			cand := "tcp://" + u.Hostname() + ":2375"
-			c, cancel := context.WithTimeout(ctx, 5*time.Second)
-			if exec.CommandContext(c, dockerTool(), "-H", cand, "version", "--format", "{{.Server.Version}}").Run() == nil {
-				ep = cand
-			}
-			cancel()
-		}
-	}
-	nodeDockerOK[node] = ep
-	return ep
-}
-
-// stackFor finds the stack a request means: on this machine, or (on a hub route) one of a
-// node's stacks that this hub holds the files for. handled is false when the request should
-// simply be passed on to the node.
-func (s *Server) stackFor(ctx context.Context, r *http.Request) (st stack, handled bool, err error) {
-	var all []stack
-	if node := r.PathValue("node"); node != "" {
-		all, err = s.hubStacks(ctx, node)
-	} else {
-		all, err = s.findStacks(ctx)
-	}
-	if err != nil {
-		return stack{}, true, err
+		return stack{}, err
 	}
 	for _, x := range all {
 		if x.Name == r.PathValue("name") {
-			if r.PathValue("node") != "" && x.Remote == "" {
-				return x, false, nil // the node can serve this one itself
-			}
-			return x, true, nil
+			return x, nil
 		}
 	}
-	return stack{}, true, errors.New("no such stack")
+	return stack{}, errors.New("no such stack")
 }

 func (s *Server) stacksList(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 40*time.Second)
 	defer cancel()
-	if node := r.PathValue("node"); node != "" {
-		stacks, err := s.hubStacks(ctx, node)
-		if err != nil {
-			s.proxyNode(w, r) // let the node's own answer (or failure) through
-			return
-		}
-		jsonOK(w, 200, map[string]any{"stacks": stacks})
-		return
-	}
 	if dockerTool() == "" { // no Docker is an empty answer, not a failure
 		jsonOK(w, 200, map[string]any{"stacks": []stack{}})
 		return
@@ -587,11 +494,7 @@ func target(r *http.Request, st stack) (host string, index int, ok bool) {
 func (s *Server) stackFile(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 40*time.Second)
 	defer cancel()
-	st, handled, err := s.stackFor(ctx, r)
-	if !handled {
-		s.proxyNode(w, r)
-		return
-	}
+	st, err := s.stackFor(ctx, r)
 	if err != nil || !st.Editable {
 		jsonErr(w, 404, "that stack's compose file isn't anywhere this console can reach")
 		return
@@ -610,8 +513,8 @@ func (s *Server) stackFile(w http.ResponseWriter, r *http.Request) {
 	jsonOK(w, 200, map[string]any{"stack": st, "text": string(b), "sum": sumOf(b), "index": i})
 }

-// composeCmd is `docker compose …` for this stack, run where its files make sense and
-// pointed at the Docker that runs its containers. files are given as compose will see them.
+// composeCmd is `docker compose …` for this stack, run where its files make sense. files are
+// given as compose will see them.
 func composeCmd(ctx context.Context, st stack, files []string, args ...string) *exec.Cmd {
 	return compose.Cmd(ctx, specOf(st, files), args...)
 }
@@ -619,7 +522,7 @@ func composeCmd(ctx context.Context, st stack, files []string, args ...string) *
 // specOf is a stack as the compose runner needs it — and as a scheduled update stores it,
 // so the cron job and the console invoke compose identically.
 func specOf(st stack, files []string) compose.Spec {
-	return compose.Spec{Project: st.Name, Files: files, Via: st.Via, Remote: st.Remote, Tool: dockerTool()}
+	return compose.Spec{Project: st.Name, Files: files, Via: st.Via, Tool: dockerTool()}
 }

 // seenFiles is the stack's file list as compose runs it, with file i replaced by a candidate.
@@ -647,11 +550,7 @@ func (s *Server) writeAsOwner(ctx context.Context, path, text string) error {
 func (s *Server) stackSave(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 60*time.Second)
 	defer cancel()
-	st, handled, err := s.stackFor(ctx, r)
-	if !handled {
-		s.proxyNode(w, r)
-		return
-	}
+	st, err := s.stackFor(ctx, r)
 	if err != nil || !st.Editable {
 		jsonErr(w, 404, "that stack's compose file isn't anywhere this console can reach")
 		return
@@ -723,11 +622,7 @@ func (s *Server) stackSave(w http.ResponseWriter, r *http.Request) {
 func (s *Server) stackDiff(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 40*time.Second)
 	defer cancel()
-	st, handled, err := s.stackFor(ctx, r)
-	if !handled {
-		s.proxyNode(w, r)
-		return
-	}
+	st, err := s.stackFor(ctx, r)
 	if err != nil || !st.Editable {
 		jsonErr(w, 404, "that stack's compose file isn't anywhere this console can reach")
 		return
@@ -777,11 +672,7 @@ func maskEnv(text string) string {
 func (s *Server) stackAction(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 40*time.Second)
 	defer cancel()
-	st, handled, err := s.stackFor(ctx, r)
-	if !handled {
-		s.proxyNode(w, r)
-		return
-	}
+	st, err := s.stackFor(ctx, r)
 	if err != nil || !st.Editable {
 		jsonErr(w, 404, "that stack's compose file isn't anywhere this console can reach")
 		return
@@ -794,17 +685,10 @@ func (s *Server) stackAction(w http.ResponseWriter, r *http.Request) {
 	flags := priv.Quote(append([]string{"-p", st.Name}, fl...))
 	base := func(args string) string {
 		if st.Via != "" {
-			env := ""
-			if st.Remote != "" {
-				env = "-e " + priv.Quote([]string{"DOCKER_HOST=" + st.Remote}) + " "
+			// The CLI inside the orchestrator's container is its own `docker`, whatever this host runs.
+			return fmt.Sprintf("%s exec %s docker compose %s %s", dockerTool(), priv.Quote([]string{st.Via}), flags, args)
 		}
-			return fmt.Sprintf("%s exec %s%s docker compose %s %s", dockerTool(), env, priv.Quote([]string{st.Via}), flags, args)
-		}
-		env := ""
-		if st.Remote != "" { // through env(1): a quoted NAME=value in front of a command is a command name to sh, not an assignment
-			env = "env " + priv.Quote([]string{"DOCKER_HOST=" + st.Remote}) + " "
-		}
-		return fmt.Sprintf("cd %s && %s%s compose %s %s", priv.Quote([]string{filepath.Dir(files[0])}), env, dockerTool(), flags, args)
+		return fmt.Sprintf("cd %s && %s compose %s %s", priv.Quote([]string{filepath.Dir(files[0])}), dockerTool(), flags, args)
 	}
 	// After a deploy that worked, keep a copy of exactly what was deployed: the next diff is against it.
 	remember := ""
@@ -860,7 +744,7 @@ func (s *Server) stackAction(w http.ResponseWriter, r *http.Request) {
 			_ = exec.CommandContext(ctx, dockerTool(), "exec", via, "pkill", "-TERM", "-f", pattern).Run()
 		})
 	}
-	stackUpdatesForget(r.PathValue("node") + "/" + st.Name)
+	stackUpdatesForget(st.Name)
 	log.Printf("stack %s: %s started as task %s (from %s)", st.Name, r.PathValue("action"), t.ID, clientIP(r))
 	jsonOK(w, 202, t.Snapshot(false))
 }
@@ -885,20 +769,13 @@ var (

 func stackUpdatesForget(key string) { updMu.Lock(); delete(updCache, key); updMu.Unlock() }

-// checkImages asks the registry whether each image is still the one we hold. remote is a
-// DOCKER_HOST for a machine whose images live elsewhere, "" for this one. Each image is one
-// registry request, which Docker Hub counts — so this is only ever called when asked for.
-func checkImages(ctx context.Context, images []string, remote string) []imageCheck {
-	local := func(args ...string) ([]byte, error) { // the Docker that holds the images
-		if remote != "" {
-			args = append([]string{"-H", remote}, args...)
-		}
-		return dockerRun(ctx, args...)
-	}
+// checkImages asks the registry whether each image is still the one we hold. Each image is
+// one registry request, which Docker Hub counts — so this is only ever called when asked for.
+func checkImages(ctx context.Context, images []string) []imageCheck {
 	res := []imageCheck{}
 	for _, img := range images {
 		ic := imageCheck{Image: img, State: "unknown"}
-		out, err := local("image", "inspect", "-f", "{{json .RepoDigests}}", img)
+		out, err := dockerRun(ctx, "image", "inspect", "-f", "{{json .RepoDigests}}", img)
 		var have []string
 		if err != nil || json.Unmarshal(bytes.TrimSpace(out), &have) != nil || len(have) == 0 {
 			ic.Detail = "built or loaded here, not pulled from a registry"
@@ -930,31 +807,28 @@ func checkImages(ctx context.Context, images []string, remote string) []imageChe
 }

 // machineUpdates checks every image on this machine in one pass, so the container list can
-// be coloured and the fleet can be asked "what is behind?" without walking stack by stack.
+// be coloured and "what is behind?" answered without walking stack by stack.
 func (s *Server) machineUpdates(w http.ResponseWriter, r *http.Request) {
-	node := r.PathValue("node")
+	if dockerTool() == "" { // no Docker is an empty answer, not a failure
+		jsonOK(w, 200, map[string]any{"images": []imageCheck{}, "checked": 0, "stacks": map[string][]string{}})
+		return
+	}
 	ctx, cancel := context.WithTimeout(r.Context(), 10*time.Minute)
 	defer cancel()
 	stacks, err := s.findStacks(ctx)
-	if node != "" {
-		stacks, err = s.hubStacks(ctx, node)
-	}
 	if err != nil {
 		jsonErr(w, 500, err.Error())
 		return
 	}
 	// one entry per image, however many stacks use it
-	type want struct{ remote string }
-	imgs := map[string]want{}
 	byImage := map[string][]string{} // image -> stacks
 	for _, st := range stacks {
 		for _, img := range st.Images {
-			imgs[img] = want{remote: st.Remote}
 			byImage[img] = append(byImage[img], st.Name)
 		}
 	}
 	refresh := r.URL.Query().Get("refresh") == "1"
-	key := "machine:" + node
+	key := "machine"
 	updMu.Lock()
 	c, ok := updCache[key]
 	updMu.Unlock()
@@ -967,15 +841,11 @@ func (s *Server) machineUpdates(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	var list []string
-	remote := ""
-	for img, wnt := range imgs {
+	for img := range byImage {
 		list = append(list, img)
-		if wnt.remote != "" {
-			remote = wnt.remote
-		}
 	}
 	sort.Strings(list)
-	res := checkImages(ctx, list, remote)
+	res := checkImages(ctx, list)
 	updMu.Lock()
 	updCache[key] = updAnswer{time.Now(), res}
 	updMu.Unlock()
@@ -988,16 +858,12 @@ func (s *Server) machineUpdates(w http.ResponseWriter, r *http.Request) {
 func (s *Server) stackUpdates(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 90*time.Second)
 	defer cancel()
-	st, handled, err := s.stackFor(ctx, r)
-	if !handled {
-		s.proxyNode(w, r)
-		return
-	}
+	st, err := s.stackFor(ctx, r)
 	if err != nil {
 		jsonErr(w, 404, err.Error())
 		return
 	}
-	key := r.PathValue("node") + "/" + st.Name
+	key := st.Name
 	updMu.Lock()
 	c, ok := updCache[key]
 	updMu.Unlock()
@@ -1010,84 +876,38 @@ func (s *Server) stackUpdates(w http.ResponseWriter, r *http.Request) {
 		jsonOK(w, 200, map[string]any{"images": []imageCheck{}, "checked": 0})
 		return
 	}
-	res := checkImages(ctx, st.Images, st.Remote)
+	res := checkImages(ctx, st.Images)
 	updMu.Lock()
 	updCache[key] = updAnswer{time.Now(), res}
 	updMu.Unlock()
 	jsonOK(w, 200, map[string]any{"images": res, "checked": time.Now().UnixMilli()})
 }

-// taskOnHub serves a task this hub is running for one of its nodes' stacks; anything else
-// under /api/nodes/<node>/tasks belongs to the node.
-func (s *Server) taskOnHub(local http.HandlerFunc) http.HandlerFunc {
-	return func(w http.ResponseWriter, r *http.Request) {
-		if _, ok := s.tasks.Get(r.PathValue("id")); ok {
-			local(w, r)
-			return
-		}
-		s.proxyNode(w, r)
-	}
-}
-
 // ---- making and unmaking stacks ----

 var stackNameRe = regexp.MustCompile(`^[a-z0-9][a-z0-9_-]{0,62}$`)

-// homesFor is where a new stack could go, seen from this request: this machine's homes, or —
-// on a hub route — the node's own homes plus the ones this hub holds for it.
-func (s *Server) homesFor(ctx context.Context, r *http.Request) ([]stackHome, error) {
-	node := r.PathValue("node")
-	if node == "" {
+// homesFor is where a new stack could go on this machine.
+func (s *Server) homesFor(ctx context.Context) ([]stackHome, error) {
 	stacks, err := s.findStacks(ctx)
 	if err != nil {
 		return nil, err
 	}
-		return s.homesOf(stacks, true), nil
-	}
-	stacks, err := s.hubStacks(ctx, node)
-	if err != nil {
-		return nil, err
-	}
-	var held []stack
-	for _, st := range stacks {
-		if st.HeldBy != "" {
-			held = append(held, st)
-		}
-	}
-	homes := s.homesOf(held, false)
-	if code, b, err := s.nodes.Do(ctx, node, "GET", "/api/docker/stacks/homes", nil, nil); err == nil && code == 200 {
-		var res struct{ Homes []stackHome }
-		if json.Unmarshal(b, &res) == nil {
-			for _, h := range res.Homes {
-				if len(homes) > 0 && h.Stacks == 0 {
-					continue // the node's empty ~/stacks is only worth offering when there is nothing else
-				}
-				h.Default = false
-				homes = append(homes, h)
-			}
-		}
-	}
-	if len(homes) > 0 {
-		homes[0].Default = true
-	}
-	return homes, nil
+	return s.homesOf(stacks), nil
 }

 func (s *Server) stackHomes(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 40*time.Second)
 	defer cancel()
-	if dockerTool() == "" && r.PathValue("node") == "" {
+	if dockerTool() == "" {
 		jsonOK(w, 200, map[string]any{"homes": []stackHome{}})
 		return
 	}
-	homes, err := s.homesFor(ctx, r)
+	homes, err := s.homesFor(ctx)
 	if err != nil {
 		jsonErr(w, 500, err.Error())
 		return
 	}
-	if homes == nil { // a machine with no Docker and nothing held for it: an empty list, never null
-		homes = []stackHome{}
-	}
 	jsonOK(w, 200, map[string]any{"homes": homes})
 }

@@ -1114,7 +934,7 @@ func (s *Server) stackCreate(w http.ResponseWriter, r *http.Request) {
 		jsonErr(w, 400, "the compose file can't be empty")
 		return
 	}
-	homes, err := s.homesFor(ctx, r)
+	homes, err := s.homesFor(ctx)
 	if err != nil {
 		jsonErr(w, 500, err.Error())
 		return
@@ -1129,17 +949,7 @@ func (s *Server) stackCreate(w http.ResponseWriter, r *http.Request) {
 		jsonErr(w, 400, "that isn't one of the places this machine keeps stacks")
 		return
 	}
-	if r.PathValue("node") != "" && home.HeldBy == "" { // the node's own folder: the node makes it
-		r.Body, r.ContentLength = io.NopCloser(bytes.NewReader(raw)), int64(len(raw))
-		s.proxyNode(w, r)
-		return
-	}
-	var all []stack
-	if node := r.PathValue("node"); node != "" {
-		all, _ = s.hubStacks(ctx, node)
-	} else {
-		all, _ = s.findStacks(ctx)
-	}
+	all, _ := s.findStacks(ctx)
 	for _, st := range all {
 		if st.Name == name {
 			jsonErr(w, 409, "there is already a stack called "+name)
@@ -1201,7 +1011,7 @@ func (s *Server) stackCreate(w http.ResponseWriter, r *http.Request) {
 		_ = sudo("chmod", "600", filepath.Join(dir, ".env")) // it is where the secrets go
 	}
 	st := stack{Name: name, Containers: []string{}, Images: []string{}, HostFiles: []string{host}, HostFile: host, Files: []string{filepath.Join(home.Inner, name, "compose.yaml")},
-		Via: home.Via, Remote: home.Remote, HeldBy: home.HeldBy, Editable: true, Note: "not deployed", HasEnv: strings.TrimSpace(body.Env) != ""}
+		Via: home.Via, Editable: true, Note: "not deployed", HasEnv: strings.TrimSpace(body.Env) != ""}
 	st.File = st.Files[0]
 	if msg, err := composeCmd(ctx, st, seenFiles(st, -1, ""), "config", "-q").CombinedOutput(); err != nil {
 		undo()
@@ -1220,12 +1030,7 @@ func (s *Server) stackDelete(w http.ResponseWriter, r *http.Request) {
 	ctx, cancel := context.WithTimeout(r.Context(), 4*time.Minute)
 	defer cancel()
 	raw, _ := io.ReadAll(io.LimitReader(r.Body, 4096))
-	st, handled, err := s.stackFor(ctx, r)
-	if !handled {
-		r.Body, r.ContentLength = io.NopCloser(bytes.NewReader(raw)), int64(len(raw))
-		s.proxyNode(w, r)
-		return
-	}
+	st, err := s.stackFor(ctx, r)
 	if err != nil || !st.Editable {
 		jsonErr(w, 404, "that stack's compose file isn't anywhere this console can reach")
 		return
@@ -1263,7 +1068,7 @@ func (s *Server) stackDelete(w http.ResponseWriter, r *http.Request) {
 		}
 	}
 	_ = run("rmdir", dir) // only if nothing else was in it
-	stackUpdatesForget(r.PathValue("node") + "/" + st.Name)
+	stackUpdatesForget(st.Name)
 	log.Printf("stack %s: taken down and %d file(s) moved to %s (from %s)", st.Name, moved, trash, clientIP(r))
 	jsonOK(w, 200, map[string]any{"trash": trash, "moved": moved})
 }
@@ -7,6 +7,7 @@ import (
 	"testing"

 	"hamlab/internal/compose"
+	"hamlab/internal/config"
 	"hamlab/internal/store"
 )

@@ -119,3 +120,37 @@ func TestRepointSurvivesAMissingContainer(t *testing.T) {
 		t.Errorf("unresolvable spec was changed: %+v", got)
 	}
 }
+
+// Where new stacks go: Ham Lab's own <data dir>/stacks is always offered, first and as the
+// default, whether or not anything is in it yet. A folder this machine already keeps stacks
+// in — two or more deployed from it — is offered too, but never ahead of Ham Lab's own.
+func TestHomesDefaultToDataDir(t *testing.T) {
+	root := t.TempDir()
+	cfg := config.Default(filepath.Join(root, "data", "config.json"))
+	s := &Server{cfg: cfg}
+	own := filepath.Join(root, "data", "stacks")
+	legacy := filepath.Join(root, "home", "stacks", "box")
+	deployed := func(dir, name string) stack {
+		f := filepath.Join(dir, name, "compose.yaml")
+		return stack{Name: name, Containers: []string{name + "-1"}, Files: []string{f}, File: f, HostFiles: []string{f}, HostFile: f, Editable: true}
+	}
+
+	// Nothing deployed anywhere: one home, Ham Lab's own.
+	homes := s.homesOf(nil)
+	if len(homes) != 1 || homes[0].Dir != own || !homes[0].Default {
+		t.Fatalf("empty machine: homes = %+v, want just %s as default", homes, own)
+	}
+
+	// Two stacks deployed from a pre-existing folder: it is offered, after Ham Lab's own.
+	homes = s.homesOf([]stack{deployed(legacy, "a"), deployed(legacy, "b")})
+	if len(homes) != 2 || homes[0].Dir != own || !homes[0].Default || homes[1].Dir != legacy || homes[1].Default || homes[1].Stacks != 2 {
+		t.Fatalf("legacy folder: homes = %+v, want [%s (default), %s]", homes, own, legacy)
+	}
+
+	// One lone stack elsewhere says nothing about where the next should go; one in Ham Lab's
+	// own folder is already home.
+	homes = s.homesOf([]stack{deployed(filepath.Join(root, "home", "apps"), "orchestrator"), deployed(own, "c")})
+	if len(homes) != 1 || homes[0].Dir != own || homes[0].Stacks != 1 || !homes[0].Default {
+		t.Fatalf("lone stacks: homes = %+v, want just %s", homes, own)
+	}
+}
@@ -10,6 +10,7 @@ import (
 	"sync"
 	"time"

+	"hamlab/internal/incus"
 	"hamlab/internal/priv"
 	"hamlab/internal/sensors"
 	"hamlab/internal/storage"
@@ -54,6 +55,7 @@ func newStatusSensors(s *Server) *statusSensors {
 	p := &statusSensors{s: s, by: map[string][]sensors.Sensor{}, hist: map[string]*sensors.Series{}, acc: map[string]*bucket{}}
 	go p.loop("services", servicesEvery, p.services)
 	go p.loop("containers", containersEvery, p.containers)
+	go p.loop("instances", containersEvery, p.instances)
 	go p.loop("updates", updatesEvery, p.updates)
 	go p.loop("zfs", zfsEvery, p.zfs)
 	go p.loop("smart", smartEvery, p.smart)
@@ -320,6 +322,43 @@ type cpuMark struct {
 	t    int64
 }

+// instances are Incus's containers and VMs. "Down" means it should be up and is not: an
+// instance marked to start with the machine that is stopped, or one in Error — a stopped
+// instance with no such mark was stopped on purpose, as with Docker containers.
+func (p *statusSensors) instances(ctx context.Context, t int64) []sensors.Sensor {
+	if !incus.Installed() {
+		return nil
+	}
+	list, err := p.s.virt.InstancesFor(ctx, "sensors")
+	if err != nil {
+		return nil
+	}
+	var res []sensors.Sensor
+	var running, total float64
+	for _, in := range list {
+		total++
+		id := "instance." + sensors.Seg(in.Name)
+		l := map[string]string{"instance": in.Name, "type": in.Type, "image": in.Image}
+		up := in.Status == "Running"
+		if up {
+			running++
+		}
+		down := in.Status == "Error" || (!up && in.Config["boot.autostart"] == "true")
+		res = append(res,
+			sensors.Sensor{ID: id + ".running", Name: in.Name, Kind: "state", Value: up, T: t, Labels: l},
+			sensors.Sensor{ID: id + ".down", Name: in.Name + " down", Kind: "state", Value: down, T: t, Labels: l},
+			sensors.Sensor{ID: id + ".state", Name: in.Name + " state", Kind: "state", Value: strings.ToLower(in.Status), T: t, Labels: l})
+		if up {
+			res = append(res,
+				sensors.Sensor{ID: id + ".cpu", Name: in.Name + " CPU", Kind: "usage", Unit: "%", Value: float64(int(in.CPUPct*10+0.5)) / 10, T: t, Min: sensors.F(0), Labels: l},
+				sensors.Sensor{ID: id + ".mem", Name: in.Name + " memory", Kind: "bytes", Unit: "B", Value: float64(in.MemUsage), T: t, Labels: l})
+		}
+	}
+	return append(res,
+		sensors.Sensor{ID: "instances.total", Name: "Instances", Kind: "count", Value: total, T: t},
+		sensors.Sensor{ID: "instances.running", Name: "Running instances", Kind: "count", Value: running, T: t})
+}
+
 func (p *statusSensors) updates(ctx context.Context, t int64) []sensors.Sensor {
 	st := p.s.updates.Status(ctx)
 	if st.Manager == "" {
@@ -0,0 +1,418 @@
+package api
+
+// Previews for the Files tab: GET /api/files/thumb hands back one small JPEG of an image or
+// a video, made by internal/thumbs and kept in <data dir>/thumbs.db. The work is bounded
+// two ways — a handful of ffmpegs at once, and one per file however many rows ask for it —
+// because a folder of a thousand photos asks for every row the moment previews go on.
+//
+// Root mode (?sudo=1) makes the preview through the same root helper the file reads use,
+// so a file only root can read gets a preview too, and the probe runs as root as well: root
+// opens every render node, whatever groups the daemon's user has.
+
+import (
+	"context"
+	"errors"
+	"log"
+	"net/http"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"runtime"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"hamlab/internal/media"
+	"hamlab/internal/priv"
+)
+
+const thumbSize = 256
+const thumbTimeout = 30 * time.Second
+const capsTTL = 10 * time.Minute // how long a probe is believed; a refresh after an install or a group change does not wait
+
+type thumbSvc struct {
+	cache *media.Cache
+	self  string
+	sem   chan struct{}
+	mu    sync.Mutex
+	caps  map[bool]*capsEntry // keyed by root
+	calls map[string]*thumbCall
+}
+
+type capsEntry struct {
+	mu   sync.Mutex
+	caps media.Caps
+	err  error
+	at   time.Time
+}
+
+type thumbCall struct {
+	done chan struct{}
+	res  media.Result
+	err  error
+}
+
+func newThumbSvc(dataDir, self string) *thumbSvc {
+	n := runtime.NumCPU() / 2 // each ffmpeg is itself threaded; previews must not take the whole machine
+	if n < 2 {
+		n = 2
+	}
+	if n > 4 {
+		n = 4
+	}
+	return &thumbSvc{cache: media.NewCache(filepath.Join(dataDir, "thumbs.db")), self: self, sem: make(chan struct{}, n), caps: map[bool]*capsEntry{}, calls: map[string]*thumbCall{}}
+}
+
+// capsFor is what previews can be made with, probed once and kept for a while.
+func (t *thumbSvc) capsFor(ctx context.Context, root, refresh bool) (media.Caps, error) {
+	t.mu.Lock()
+	e := t.caps[root]
+	if e == nil {
+		e = &capsEntry{}
+		t.caps[root] = e
+	}
+	t.mu.Unlock()
+	e.mu.Lock()
+	defer e.mu.Unlock()
+	if !refresh && !e.at.IsZero() && time.Since(e.at) < capsTTL {
+		return e.caps, e.err
+	}
+	if root {
+		e.caps, e.err = media.ProbeRoot(ctx, t.self)
+	} else {
+		e.caps, e.err = media.Probe(ctx), nil
+	}
+	e.at = time.Now()
+	mode := "as " + map[bool]string{false: "the daemon", true: "root"}[root]
+	switch {
+	case e.err != nil:
+		log.Printf("thumbs: probe %s failed: %v", mode, e.err)
+	case e.caps.Error != "":
+		log.Printf("thumbs: %s: %s", mode, e.caps.Error)
+	default:
+		log.Printf("thumbs: %s: ffmpeg %s, %s", mode, e.caps.Version, describeCaps(e.caps))
+	}
+	return e.caps, e.err
+}
+
+// describeCaps is the one line that says how previews get made here.
+func describeCaps(c media.Caps) string {
+	if len(c.GPUs) == 0 {
+		return "CPU only"
+	}
+	parts := make([]string, 0, len(c.GPUs))
+	for _, g := range c.GPUs {
+		name := g.Name
+		if name == "" {
+			name = g.Device
+		}
+		p := name + " (" + g.API
+		if len(g.Codecs) > 0 {
+			p += ": " + strings.Join(g.Codecs, ", ")
+		}
+		parts = append(parts, p+")")
+	}
+	return "GPU " + strings.Join(parts, ", ")
+}
+
+// make produces a preview, sharing the work when the same file is asked for twice at once.
+func (t *thumbSvc) make(ctx context.Context, root bool, key, path string) (media.Result, error) {
+	t.mu.Lock()
+	if c, ok := t.calls[key]; ok {
+		t.mu.Unlock()
+		select {
+		case <-c.done:
+			return c.res, c.err
+		case <-ctx.Done():
+			return media.Result{}, ctx.Err()
+		}
+	}
+	c := &thumbCall{done: make(chan struct{})}
+	t.calls[key] = c
+	t.mu.Unlock()
+	defer func() {
+		t.mu.Lock()
+		delete(t.calls, key)
+		t.mu.Unlock()
+		close(c.done)
+	}()
+	// The work itself runs on a context of its own: the first requester going away must not
+	// cancel a preview three other rows are waiting for.
+	wctx, cancel := context.WithTimeout(context.Background(), thumbTimeout+5*time.Second)
+	defer cancel()
+	select {
+	case t.sem <- struct{}{}:
+		defer func() { <-t.sem }()
+	case <-ctx.Done():
+		c.err = ctx.Err()
+		return c.res, c.err
+	}
+	caps, err := t.capsFor(wctx, root, false)
+	if err != nil {
+		c.err = err
+		return c.res, c.err
+	}
+	o := media.Opts{Size: thumbSize, Timeout: thumbTimeout}
+	if root {
+		c.res, c.err = media.MakeRoot(wctx, t.self, caps, path, o)
+	} else {
+		c.res, c.err = media.Make(wctx, caps, path, o)
+	}
+	return c.res, c.err
+}
+
+// ---- handlers ----
+
+// filesThumb: GET /api/files/thumb?path=…&v=<mtime>-<size>[&sudo=1]. v is the client's idea of
+// the file, from its listing; it makes a cache hit free of a stat, and a changed file a new URL.
+func (s *Server) filesThumb(w http.ResponseWriter, r *http.Request) {
+	fsys, ok := s.fsFor(w, r)
+	if !ok {
+		return
+	}
+	p, ok := cleanQuery(w, r, "path")
+	if !ok {
+		return
+	}
+	if media.Kind(p) == "" {
+		jsonErr(w, 415, "no preview for this kind of file")
+		return
+	}
+	root := r.URL.Query().Get("sudo") == "1"
+	if mt, sz, ok := parseV(r.URL.Query().Get("v")); ok {
+		key := media.Key(p, sz, mt)
+		if r.Header.Get("If-None-Match") == `"`+key+`"` {
+			w.WriteHeader(304)
+			return
+		}
+		if s.serveCachedThumb(w, key) {
+			return
+		}
+	}
+	in, err := fsys.Stat(r.Context(), p)
+	if err != nil {
+		fsErr(w, err)
+		return
+	}
+	if in.Type == "dir" || in.Type == "other" || in.Broken {
+		jsonErr(w, 400, "not a regular file")
+		return
+	}
+	key := media.Key(p, in.Size, in.Mtime)
+	if s.serveCachedThumb(w, key) {
+		return
+	}
+	res, err := s.thumbs.make(r.Context(), root, key, p)
+	if err != nil {
+		var de *media.DecodeError
+		switch {
+		case errors.As(err, &de):
+			if err := s.thumbs.cache.Put(key, media.Entry{Path: p, Failure: de.Msg}); err != nil {
+				log.Printf("thumbs: cache: %v", err)
+			}
+			log.Printf("thumbs: %s: %s", p, de.Msg)
+			jsonErr(w, 422, de.Msg)
+		case errors.Is(err, context.DeadlineExceeded):
+			log.Printf("thumbs: %s: timed out", p)
+			jsonErr(w, 504, "preview timed out")
+		case errors.Is(err, context.Canceled):
+			jsonErr(w, 499, "cancelled")
+		default:
+			jsonErr(w, 503, err.Error())
+		}
+		return
+	}
+	if err := s.thumbs.cache.Put(key, media.Entry{Path: p, Engine: res.Engine, Codec: res.Codec, Width: res.Width, Height: res.Height, JPEG: res.JPEG}); err != nil {
+		log.Printf("thumbs: cache: %v", err)
+	}
+	writeThumb(w, key, res.JPEG, res.Engine)
+}
+
+// serveCachedThumb answers from the cache when it can. A cache that cannot be read is a
+// miss: the preview is made again rather than refused.
+func (s *Server) serveCachedThumb(w http.ResponseWriter, key string) bool {
+	e, found, err := s.thumbs.cache.Get(key)
+	if err != nil {
+		log.Printf("thumbs: cache: %v", err)
+	}
+	switch {
+	case !found:
+		return false
+	case e.Failure != "":
+		jsonErr(w, 422, e.Failure)
+	default:
+		writeThumb(w, key, e.JPEG, "cache ("+e.Engine+")")
+	}
+	return true
+}
+
+func writeThumb(w http.ResponseWriter, key string, jpeg []byte, engine string) {
+	w.Header().Set("Content-Type", "image/jpeg")
+	w.Header().Set("Content-Length", strconv.Itoa(len(jpeg)))
+	w.Header().Set("Cache-Control", "private, max-age=604800")
+	w.Header().Set("ETag", `"`+key+`"`)
+	w.Header().Set("X-Hamlab-Thumb", engine)
+	w.Header().Set("X-Content-Type-Options", "nosniff")
+	_, _ = w.Write(jpeg)
+}
+
+func parseV(v string) (mtime, size int64, ok bool) {
+	a, b, found := strings.Cut(v, "-")
+	if !found {
+		return 0, 0, false
+	}
+	mtime, err1 := strconv.ParseInt(a, 10, 64)
+	size, err2 := strconv.ParseInt(b, 10, 64)
+	return mtime, size, err1 == nil && err2 == nil
+}
+
+type thumbStatus struct {
+	OK       bool          `json:"ok"`
+	Engine   string        `json:"engine"` // gpu | cpu | ""
+	Summary  string        `json:"summary"`
+	FFmpeg   string        `json:"ffmpeg,omitempty"`
+	GPUs     []media.GPU   `json:"gpus"`
+	Unusable []media.GPU   `json:"unusable,omitempty"`
+	Error    string        `json:"error,omitempty"`
+	Install  *thumbInstall `json:"install,omitempty"` // ffmpeg is missing and this can put it on
+	GPUFix   bool          `json:"gpu_fix,omitempty"` // a render node is there but closed to the daemon's user, and this can open it
+	User     string        `json:"user"`
+	Cache    thumbCache    `json:"cache"`
+}
+
+type thumbCache struct {
+	Path    string `json:"path"`
+	Entries int64  `json:"entries"`
+	Bytes   int64  `json:"bytes"`
+}
+
+type thumbInstall struct {
+	PM      string `json:"pm"`
+	Package string `json:"package"`
+}
+
+// thumbsStatus: GET /api/files/thumbs[?sudo=1][&refresh=1] — how previews get made on this machine.
+func (s *Server) thumbsStatus(w http.ResponseWriter, r *http.Request) {
+	root := r.URL.Query().Get("sudo") == "1"
+	if root && s.fsSudo == nil {
+		jsonErr(w, 403, "root access needs passwordless sudo on the host")
+		return
+	}
+	caps, err := s.thumbs.capsFor(r.Context(), root, r.URL.Query().Get("refresh") == "1")
+	st := thumbStatus{GPUs: []media.GPU{}, User: s.user, Cache: thumbCache{Path: s.thumbs.cache.Path}}
+	st.Cache.Entries, st.Cache.Bytes = s.thumbs.cache.Stats()
+	if root {
+		st.User = "root"
+	}
+	if err != nil {
+		st.Error = err.Error()
+		jsonOK(w, 200, st)
+		return
+	}
+	st.FFmpeg, st.GPUs, st.Unusable, st.Error = caps.Version, caps.GPUs, caps.Unusable, caps.Error
+	if st.GPUs == nil {
+		st.GPUs = []media.GPU{}
+	}
+	st.OK = caps.Error == ""
+	switch {
+	case !st.OK:
+		if pkg := ffmpegPackage(s.updates.PM()); pkg != "" && priv.Available() {
+			st.Install = &thumbInstall{PM: s.updates.PM(), Package: pkg}
+		}
+		st.Summary = st.Error
+	case len(caps.GPUs) > 0:
+		st.Engine = "gpu"
+		st.Summary = describeCaps(caps) + " · images on the CPU"
+	default:
+		st.Engine = "cpu"
+		st.Summary = "CPU only"
+	}
+	if !root {
+		for _, g := range caps.Unusable {
+			if g.Permission && gpuFixPossible() {
+				st.GPUFix = true
+			}
+		}
+	}
+	jsonOK(w, 200, st)
+}
+
+// ffmpegPackage is what to install for ffmpeg on a package manager. Fedora ships it as
+// ffmpeg-free; the others under its own name.
+func ffmpegPackage(pm string) string {
+	switch pm {
+	case "":
+		return ""
+	case "dnf":
+		if b, _ := os.ReadFile("/etc/os-release"); strings.Contains(string(b), "ID=fedora") {
+			return "ffmpeg-free"
+		}
+	}
+	return "ffmpeg"
+}
+
+const hamlabUnit = "/etc/systemd/system/hamlab.service"
+
+// gpuFixPossible: the daemon is an ordinary user under systemd, with root to hand.
+func gpuFixPossible() bool {
+	if os.Geteuid() == 0 || !priv.Available() {
+		return false
+	}
+	_, err := os.Stat(hamlabUnit)
+	return err == nil
+}
+
+// thumbsInstall: POST /api/files/thumbs/install — put ffmpeg on with the machine's package manager.
+func (s *Server) thumbsInstall(w http.ResponseWriter, r *http.Request) {
+	pkg := ffmpegPackage(s.updates.PM())
+	if pkg == "" {
+		jsonErr(w, 400, "no supported package manager on this machine")
+		return
+	}
+	t, err := s.updates.Install([]string{pkg})
+	if err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	log.Printf("thumbs: installing %s as task %s (from %s)", pkg, t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
+
+// gpuAccessScript gives hamlab.service the groups that own the render nodes, by a drop-in,
+// then restarts it: a running process cannot gain a group.
+const gpuAccessScript = `set -e
+unit=` + hamlabUnit + `
+[ -f "$unit" ] || { echo "no $unit: this machine does not run Ham Lab under systemd"; exit 1; }
+groups=""
+for g in render video; do
+  if getent group "$g" >/dev/null 2>&1; then groups="$groups $g"; fi
+done
+[ -n "$groups" ] || { echo "neither a render nor a video group exists here"; exit 1; }
+mkdir -p "$unit.d"
+printf '[Service]\nSupplementaryGroups=%s\n' "${groups# }" > "$unit.d/gpu.conf"
+echo "hamlab.service: supplementary groups${groups} ($unit.d/gpu.conf)"
+systemctl daemon-reload
+echo 'Ham Lab restarts in 3 seconds to pick up its new groups; the page reconnects by itself.'
+systemd-run --quiet --on-active=3 --unit=hamlab-gpu-restart systemctl restart hamlab.service
+`
+
+// thumbsGPUAccess: POST /api/files/thumbs/gpu-access — open the render nodes to the daemon.
+func (s *Server) thumbsGPUAccess(w http.ResponseWriter, r *http.Request) {
+	if !gpuFixPossible() {
+		jsonErr(w, 400, "nothing to do: Ham Lab is root, has no root, or is not under systemd here")
+		return
+	}
+	if t, busy := s.tasks.RunningOf("thumbs:gpu"); busy { // a second run would only collide with the first's restart timer
+		jsonErr(w, 409, "already being done (task "+t.ID+")")
+		return
+	}
+	full := priv.Wrap("sh", "-c", gpuAccessScript)
+	t, err := s.tasks.Start("thumbs:gpu", "give Ham Lab access to the GPU", exec.Command(full[0], full[1:]...))
+	if err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	log.Printf("thumbs: GPU access drop-in as task %s, restart follows (from %s)", t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
@@ -13,12 +13,20 @@ import (
 	"io"
 	"log"
 	"net/http"
+	"net/url"
 	"os"
+	"os/exec"
+	"path"
 	"path/filepath"
+	"regexp"
 	"strings"
 	"time"

+	"github.com/coder/websocket"
+
 	"hamlab/internal/incus"
+	"hamlab/internal/priv"
+	"hamlab/internal/sensors"
 )

 func readBody(r *http.Request, v any, max int64) error {
@@ -40,9 +48,17 @@ func (s *Server) virtOverview(w http.ResponseWriter, r *http.Request) {
 		imgs, _ := s.virt.Images(ctx)
 		out["images"] = imgs
 		out["pools"] = s.virt.Pools(ctx)
+		out["default_pool"] = s.virt.DefaultPool(ctx)
 		out["networks"] = s.virt.Networks(ctx)
 	}
-	out["library"] = map[string]any{"images": s.virt.Library(s.virt.ImagesDir()), "isos": s.virt.Library(s.virt.ISOsDir())}
+	isos := s.virt.Library(s.virt.ISOsDir())
+	if inst, ok := out["instances"].([]incus.Instance); ok {
+		users := s.isoUsers(inst)
+		for i := range isos {
+			isos[i].AttachedTo = users[isos[i].Name]
+		}
+	}
+	out["library"] = map[string]any{"images": s.virt.Library(s.virt.ImagesDir()), "isos": isos}
 	jsonOK(w, 200, out)
 }

@@ -270,6 +286,9 @@ func (s *Server) virtInstance(w http.ResponseWriter, r *http.Request) {
 		jsonErr(w, 400, "bad name")
 		return
 	}
+	if !s.virtReady(w, r) {
+		return
+	}
 	list, err := s.virt.Instances(r.Context())
 	if err != nil {
 		jsonErr(w, 502, err.Error())
@@ -388,6 +407,12 @@ func (s *Server) virtConfig(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	var set, unset []string
+	desc, hasDesc := body["description"]
+	delete(body, "description")
+	if hasDesc && (len(desc) > 200 || strings.ContainsAny(desc, "\n\r")) {
+		jsonErr(w, 400, "bad value for description")
+		return
+	}
 	for k, v := range body {
 		v = strings.TrimSpace(v)
 		ok := false
@@ -400,8 +425,6 @@ func (s *Server) virtConfig(w http.ResponseWriter, r *http.Request) {
 			ok = incus.ValidCron(v)
 		case "snapshots.expiry":
 			ok = incus.ValidExpiry(v)
-		case "description":
-			ok = len(v) <= 200 && !strings.ContainsAny(v, "\n\r")
 		case "boot.autostart":
 			ok = v == "" || v == "true" || v == "false"
 		}
@@ -429,6 +452,14 @@ func (s *Server) virtConfig(w http.ResponseWriter, r *http.Request) {
 	for _, k := range unset {
 		_, _ = s.virt.Cmd(ctx, "config", "unset", name, k).CombinedOutput() // unsetting what isn't set is fine
 	}
+	if hasDesc {
+		// the description is a field of the instance, not a config key, so it goes in through the API
+		patch, _ := json.Marshal(map[string]string{"description": strings.TrimSpace(desc)})
+		if out, err := s.virt.Cmd(ctx, "query", "-X", "PATCH", "-d", string(patch), "/1.0/instances/"+name).CombinedOutput(); err != nil {
+			jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+			return
+		}
+	}
 	log.Printf("virt: config %s set %v unset %v (from %s)", name, set, unset, clientIP(r))
 	w.WriteHeader(204)
 }
@@ -488,3 +519,649 @@ func (s *Server) virtSnapshotAction(w http.ResponseWriter, r *http.Request) {
 	log.Printf("virt: snapshot %s %s/%s (from %s)", action, name, snap, clientIP(r))
 	w.WriteHeader(204)
 }
+
+// ---- the graphical console ----
+
+// virtVGA bridges the browser to the VM's SPICE display: the browser's websocket on one side,
+// Incus's display websocket (dialled over its unix socket) on the other, frames copied both
+// ways. spice-html5 in the page speaks SPICE; Ham Lab only carries it.
+func (s *Server) virtVGA(w http.ResponseWriter, r *http.Request) {
+	name := r.PathValue("name")
+	if !incus.ValidName(name) {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	// spice-html5 asks for the "binary" subprotocol and gives up unless the server agrees to it
+	conn, err := websocket.Accept(w, r, &websocket.AcceptOptions{CompressionMode: websocket.CompressionDisabled, Subprotocols: []string{"binary"}})
+	if err != nil {
+		return
+	}
+	conn.SetReadLimit(64 << 20)
+	ctx, cancel := context.WithCancel(r.Context())
+	defer cancel()
+	display, release, err := s.virt.VGAChannel(ctx, name)
+	if err != nil {
+		log.Printf("virt: vga %s refused: %v (from %s)", name, err, clientIP(r))
+		conn.Close(websocket.StatusInternalError, truncate(err.Error(), 120))
+		return
+	}
+	defer release()
+	defer display.Close(websocket.StatusNormalClosure, "")
+	go func() {
+		defer cancel()
+		for {
+			_, data, err := display.Read(ctx)
+			if err != nil {
+				return
+			}
+			if err := conn.Write(ctx, websocket.MessageBinary, data); err != nil {
+				return
+			}
+		}
+	}()
+	for {
+		_, data, err := conn.Read(ctx)
+		if err != nil {
+			break
+		}
+		if err := display.Write(ctx, websocket.MessageBinary, data); err != nil {
+			break
+		}
+	}
+	cancel()
+	conn.Close(websocket.StatusNormalClosure, "")
+}
+
+func truncate(s string, n int) string {
+	if len(s) > n {
+		return s[:n]
+	}
+	return s
+}
+
+// ---- ISOs ----
+
+func (s *Server) isoPath(name string) (string, bool) {
+	if !incus.ValidISOName(name) {
+		return "", false
+	}
+	return filepath.Join(s.virt.ISOsDir(), name), true
+}
+
+// isoUsers says which instances have each ISO file attached, by its file name.
+func (s *Server) isoUsers(list []incus.Instance) map[string][]string {
+	out := map[string][]string{}
+	dir := s.virt.ISOsDir() + "/"
+	for _, in := range list {
+		for _, d := range in.Devices {
+			if d["type"] == "disk" && strings.HasPrefix(d["source"], dir) {
+				n := strings.TrimPrefix(d["source"], dir)
+				out[n] = append(out[n], in.Name)
+			}
+		}
+	}
+	return out
+}
+
+// userShell runs a small script as the daemon's own account — file work in Ham Lab's folder
+// needs no root — with positional parameters.
+func userShell(script string, params ...string) *exec.Cmd {
+	return exec.Command("sh", append([]string{"-c", script, "hamlab"}, params...)...)
+}
+
+var urlRe = regexp.MustCompile(`^https?://[^\s"'<>]+$`)
+
+func (s *Server) virtISOFetch(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		URL    string `json:"url"`
+		SHA256 string `json:"sha256"`
+		Name   string `json:"name"`
+	}
+	_ = readBody(r, &body, 8192)
+	u := strings.TrimSpace(body.URL)
+	if !urlRe.MatchString(u) {
+		jsonErr(w, 400, "url: http or https")
+		return
+	}
+	name := strings.TrimSpace(body.Name)
+	if name == "" {
+		if pu, err := url.Parse(u); err == nil {
+			name = path.Base(pu.Path)
+		}
+	}
+	dest, ok := s.isoPath(name)
+	if !ok {
+		jsonErr(w, 400, "name: a file name ending in .iso")
+		return
+	}
+	sum := strings.ToLower(strings.TrimSpace(body.SHA256))
+	if sum != "" && !regexp.MustCompile(`^[0-9a-f]{64}$`).MatchString(sum) {
+		jsonErr(w, 400, "sha256: 64 hex digits")
+		return
+	}
+	if _, err := os.Stat(dest); err == nil {
+		jsonErr(w, 409, name+" is already in the library")
+		return
+	}
+	if err := s.virt.EnsureDirs(); err != nil {
+		jsonErr(w, 500, err.Error())
+		return
+	}
+	script := `set -e; echo "fetching $1"; echo "  to $2"; curl -fL --retry 3 -sS -o "$2.part" "$1"; if [ -n "$3" ]; then echo "$3  $2.part" | sha256sum -c - || { rm -f "$2.part"; exit 1; }; fi; mv "$2.part" "$2"; ls -l "$2" | awk '{print "  " $5 " bytes"}'`
+	t, err := s.tasks.Start("virt:iso", "fetch "+name, userShell(script, u, dest, sum))
+	if err != nil {
+		jsonErr(w, 409, err.Error())
+		return
+	}
+	log.Printf("virt: iso fetch %s as task %s (from %s)", u, t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
+
+func (s *Server) virtISOImport(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Path string `json:"path"`
+	}
+	_ = readBody(r, &body, 8192)
+	p := filepath.Clean(body.Path)
+	st, err := os.Stat(p)
+	if !filepath.IsAbs(p) || err != nil || !st.Mode().IsRegular() {
+		jsonErr(w, 400, "path: a file on this machine")
+		return
+	}
+	dest, ok := s.isoPath(filepath.Base(p))
+	if !ok {
+		jsonErr(w, 400, "the file has to be a .iso or .img")
+		return
+	}
+	if _, err := os.Stat(dest); err == nil {
+		jsonErr(w, 409, filepath.Base(p)+" is already in the library")
+		return
+	}
+	if err := s.virt.EnsureDirs(); err != nil {
+		jsonErr(w, 500, err.Error())
+		return
+	}
+	script := `set -e; echo "copying $1"; echo "  to $2"; cp --reflink=auto "$1" "$2.part" && mv "$2.part" "$2"; ls -l "$2" | awk '{print "  " $5 " bytes"}'`
+	cmd := userShell(script, p, dest)
+	if f, err := os.Open(p); err != nil && priv.Available() { // readable only by root: copy as root and hand it over
+		argv := priv.Wrap("sh", "-c", script+`; chown "$3" "$2"`, "hamlab", p, dest, s.user)
+		cmd = exec.Command(argv[0], argv[1:]...)
+	} else if err == nil {
+		f.Close()
+	}
+	t, err := s.tasks.Start("virt:iso", "import "+filepath.Base(p), cmd)
+	if err != nil {
+		jsonErr(w, 409, err.Error())
+		return
+	}
+	log.Printf("virt: iso import %s as task %s (from %s)", p, t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
+
+func (s *Server) virtISODelete(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Name string `json:"name"`
+	}
+	_ = readBody(r, &body, 4096)
+	p, ok := s.isoPath(body.Name)
+	if !ok {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if list, err := s.virt.Instances(r.Context()); err == nil {
+		if users := s.isoUsers(list)[body.Name]; len(users) > 0 {
+			jsonErr(w, 409, "attached to "+strings.Join(users, ", ")+" — detach it first")
+			return
+		}
+	}
+	if err := os.Remove(p); err != nil {
+		jsonErr(w, 404, "no such ISO")
+		return
+	}
+	log.Printf("virt: iso %s deleted (from %s)", body.Name, clientIP(r))
+	w.WriteHeader(204)
+}
+
+func (s *Server) virtISORename(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Name string `json:"name"`
+		To   string `json:"to"`
+	}
+	_ = readBody(r, &body, 4096)
+	from, ok1 := s.isoPath(body.Name)
+	to, ok2 := s.isoPath(body.To)
+	if !ok1 || !ok2 {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if list, err := s.virt.Instances(r.Context()); err == nil {
+		if users := s.isoUsers(list)[body.Name]; len(users) > 0 {
+			jsonErr(w, 409, "attached to "+strings.Join(users, ", ")+" — detach it first")
+			return
+		}
+	}
+	if _, err := os.Stat(to); err == nil {
+		jsonErr(w, 409, body.To+" already exists")
+		return
+	}
+	if err := os.Rename(from, to); err != nil {
+		jsonErr(w, 404, "no such ISO")
+		return
+	}
+	w.WriteHeader(204)
+}
+
+func (s *Server) instanceByName(ctx context.Context, name string) (*incus.Instance, error) {
+	list, err := s.virt.Instances(ctx)
+	if err != nil {
+		return nil, err
+	}
+	for i := range list {
+		if list[i].Name == name {
+			return &list[i], nil
+		}
+	}
+	return nil, fmt.Errorf("no instance called %s", name)
+}
+
+// virtISOAttach puts an ISO in a VM's drive — live or stopped, Incus takes either — as a ROM
+// device, first in the boot order when asked.
+func (s *Server) virtISOAttach(w http.ResponseWriter, r *http.Request) {
+	name := r.PathValue("name")
+	var body struct {
+		ISO       string `json:"iso"`
+		BootFirst bool   `json:"boot_first"`
+	}
+	_ = readBody(r, &body, 4096)
+	p, ok := s.isoPath(body.ISO)
+	if !incus.ValidName(name) || !ok {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if _, err := os.Stat(p); err != nil {
+		jsonErr(w, 404, "no such ISO in the library")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	in, err := s.instanceByName(r.Context(), name)
+	if err != nil {
+		jsonErr(w, 404, err.Error())
+		return
+	}
+	if in.Type != "virtual-machine" {
+		jsonErr(w, 409, "only a virtual machine takes an ISO")
+		return
+	}
+	dev := ""
+	for i := 0; i < 10; i++ {
+		if _, taken := in.Devices[fmt.Sprintf("iso%d", i)]; !taken {
+			dev = fmt.Sprintf("iso%d", i)
+			break
+		}
+	}
+	if dev == "" {
+		jsonErr(w, 409, "ten ISOs are already attached")
+		return
+	}
+	args := []string{"config", "device", "add", name, dev, "disk", "source=" + p}
+	if body.BootFirst {
+		args = append(args, "boot.priority=10")
+	}
+	ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
+	defer cancel()
+	if out, err := s.virt.Cmd(ctx, args...).CombinedOutput(); err != nil {
+		jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+		return
+	}
+	log.Printf("virt: %s attached to %s as %s (from %s)", body.ISO, name, dev, clientIP(r))
+	jsonOK(w, 200, map[string]string{"device": dev})
+}
+
+func (s *Server) virtISODetach(w http.ResponseWriter, r *http.Request) {
+	name := r.PathValue("name")
+	var body struct {
+		Device string `json:"device"`
+	}
+	_ = readBody(r, &body, 4096)
+	if !incus.ValidName(name) || !incus.ValidDevice(body.Device) {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	in, err := s.instanceByName(r.Context(), name)
+	if err != nil {
+		jsonErr(w, 404, err.Error())
+		return
+	}
+	d, ok := in.Devices[body.Device]
+	if !ok || d["type"] != "disk" || !strings.HasPrefix(d["source"], s.virt.ISOsDir()+"/") {
+		jsonErr(w, 409, body.Device+" isn't an ISO from the library")
+		return
+	}
+	ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
+	defer cancel()
+	if out, err := s.virt.Cmd(ctx, "config", "device", "remove", name, body.Device).CombinedOutput(); err != nil {
+		jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+		return
+	}
+	log.Printf("virt: %s detached from %s (from %s)", body.Device, name, clientIP(r))
+	w.WriteHeader(204)
+}
+
+func (s *Server) virtFromISO(w http.ResponseWriter, r *http.Request) {
+	var sp incus.FromISOSpec
+	if err := readBody(r, &sp, 16<<10); err != nil {
+		jsonErr(w, 400, "bad request")
+		return
+	}
+	st := s.virt.Detect(r.Context())
+	if st.State != "ready" {
+		jsonErr(w, 409, "Incus isn't ready on this machine")
+		return
+	}
+	script, params, err := incus.FromISOScript(sp, st.KVM)
+	if err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	p, _ := s.isoPath(sp.ISO)
+	if _, err := os.Stat(p); err != nil {
+		jsonErr(w, 404, "no such ISO in the library")
+		return
+	}
+	params[1] = p
+	if _, err := s.instanceByName(r.Context(), sp.Name); err == nil {
+		jsonErr(w, 409, "there is already an instance called "+sp.Name)
+		return
+	}
+	t, err := s.tasks.Start("virt:create", "create VM "+sp.Name+" from "+sp.ISO, s.virt.ShellCmd(r.Context(), script, params...))
+	if err != nil {
+		jsonErr(w, 409, err.Error())
+		return
+	}
+	log.Printf("virt: VM %s from %s as task %s (from %s)", sp.Name, sp.ISO, t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
+
+// ---- mounts: disk devices other than root ----
+
+func (s *Server) virtMountAdd(w http.ResponseWriter, r *http.Request) {
+	name := r.PathValue("name")
+	var body struct {
+		Device   string `json:"device"`
+		Source   string `json:"source"`
+		Path     string `json:"path"`
+		ReadOnly bool   `json:"readonly"`
+		Shift    bool   `json:"shift"`
+	}
+	_ = readBody(r, &body, 8192)
+	src, dst := filepath.Clean(body.Source), filepath.Clean(body.Path)
+	dev := strings.TrimSpace(body.Device)
+	if dev == "" {
+		dev = "mnt-" + sensors.Seg(filepath.Base(src))
+	}
+	switch {
+	case !incus.ValidName(name):
+		jsonErr(w, 400, "bad name")
+		return
+	case !incus.ValidDevice(dev):
+		jsonErr(w, 400, "device: letters, digits, dashes")
+		return
+	case !filepath.IsAbs(src) || !filepath.IsAbs(dst) || dst == "/":
+		jsonErr(w, 400, "source and path: absolute paths; path not /")
+		return
+	}
+	if _, err := os.Stat(src); err != nil && os.IsNotExist(err) {
+		jsonErr(w, 404, src+" doesn't exist on this machine")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	in, err := s.instanceByName(r.Context(), name)
+	if err != nil {
+		jsonErr(w, 404, err.Error())
+		return
+	}
+	if _, taken := in.Devices[dev]; taken {
+		jsonErr(w, 409, "there is already a device called "+dev)
+		return
+	}
+	args := []string{"config", "device", "add", name, dev, "disk", "source=" + src, "path=" + dst}
+	if body.ReadOnly {
+		args = append(args, "readonly=true")
+	}
+	if body.Shift && in.Type == "container" {
+		args = append(args, "shift=true")
+	}
+	ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
+	defer cancel()
+	if out, err := s.virt.Cmd(ctx, args...).CombinedOutput(); err != nil {
+		jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+		return
+	}
+	log.Printf("virt: %s: mounted %s at %s as %s (from %s)", name, src, dst, dev, clientIP(r))
+	jsonOK(w, 200, map[string]string{"device": dev})
+}
+
+func (s *Server) virtMountRemove(w http.ResponseWriter, r *http.Request) {
+	name := r.PathValue("name")
+	var body struct {
+		Device string `json:"device"`
+	}
+	_ = readBody(r, &body, 4096)
+	if !incus.ValidName(name) || !incus.ValidDevice(body.Device) || body.Device == "root" {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	in, err := s.instanceByName(r.Context(), name)
+	if err != nil {
+		jsonErr(w, 404, err.Error())
+		return
+	}
+	if d, ok := in.Devices[body.Device]; !ok || d["type"] != "disk" {
+		jsonErr(w, 409, body.Device+" isn't a disk device of "+name)
+		return
+	}
+	ctx, cancel := context.WithTimeout(r.Context(), time.Minute)
+	defer cancel()
+	if out, err := s.virt.Cmd(ctx, "config", "device", "remove", name, body.Device).CombinedOutput(); err != nil {
+		jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+		return
+	}
+	log.Printf("virt: %s: device %s removed (from %s)", name, body.Device, clientIP(r))
+	w.WriteHeader(204)
+}
+
+// ---- exports ----
+
+func (s *Server) virtExports(w http.ResponseWriter, r *http.Request) {
+	c := s.virt.ExportConfig()
+	out := map[string]any{"config": c, "cron": c.CronExpr(), "last": s.virt.LastExportRun(), "files": s.virt.ExportFiles(), "dir": s.virt.ExportsDir(), "cron_file": incus.CronFile}
+	if c.Enabled {
+		out["next"] = c.NextRun(time.Now())
+	}
+	jsonOK(w, 200, out)
+}
+
+func (s *Server) virtExportsPut(w http.ResponseWriter, r *http.Request) {
+	var c incus.ExportConfig
+	if err := readBody(r, &c, 16<<10); err != nil {
+		jsonErr(w, 400, "bad request")
+		return
+	}
+	if err := s.virt.SaveExportConfig(c); err != nil {
+		jsonErr(w, 400, err.Error())
+		return
+	}
+	exe, err := os.Executable()
+	if err == nil {
+		exe, _ = filepath.EvalSymlinks(exe)
+	}
+	if c.Enabled {
+		err = s.storage.WriteRootFile(r.Context(), incus.CronFile, c.CronText(s.user, exe, s.cfg.Path()))
+	} else {
+		err = s.storage.RemoveRootFile(r.Context(), incus.CronFile)
+	}
+	if err != nil {
+		jsonErr(w, 500, "schedule saved, but the cron file could not be written: "+err.Error())
+		return
+	}
+	log.Printf("virt: exports %v at %02d:%02d keep %d (from %s)", c.Enabled, c.Hour, c.Minute, c.Keep, clientIP(r))
+	w.WriteHeader(204)
+}
+
+func (s *Server) virtExportsRun(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Instance string `json:"instance"`
+	}
+	_ = readBody(r, &body, 4096)
+	if body.Instance != "" && !incus.ValidName(body.Instance) {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	exe, err := os.Executable()
+	if err != nil {
+		jsonErr(w, 500, err.Error())
+		return
+	}
+	args := []string{"-config", s.cfg.Path(), "virt-export"}
+	title := "export every instance"
+	if body.Instance != "" {
+		args = append(args, body.Instance)
+		title = "export " + body.Instance
+	}
+	t, err := s.tasks.Start("virt:export", title, exec.Command(exe, args...))
+	if err != nil {
+		jsonErr(w, 409, err.Error())
+		return
+	}
+	log.Printf("virt: %s as task %s (from %s)", title, t.ID, clientIP(r))
+	jsonOK(w, 202, t.Snapshot(false))
+}
+
+func (s *Server) virtExportDelete(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Instance string `json:"instance"`
+		Name     string `json:"name"`
+	}
+	_ = readBody(r, &body, 4096)
+	if !incus.ValidName(body.Instance) || body.Name != filepath.Base(body.Name) || !strings.HasSuffix(body.Name, ".tar.gz") {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if err := os.Remove(filepath.Join(s.virt.ExportsDir(), body.Instance, body.Name)); err != nil {
+		jsonErr(w, 404, "no such export")
+		return
+	}
+	log.Printf("virt: export %s/%s deleted (from %s)", body.Instance, body.Name, clientIP(r))
+	w.WriteHeader(204)
+}
+
+// virtSSHKeys is the daemon account's public keys, for a cloud-init that lets him straight in.
+func (s *Server) virtSSHKeys(w http.ResponseWriter, _ *http.Request) {
+	home, _ := os.UserHomeDir()
+	seen := map[string]bool{}
+	keys := []string{}
+	add := func(line string) {
+		f := strings.Fields(line)
+		if len(f) < 2 || !strings.HasPrefix(f[0], "ssh-") && !strings.HasPrefix(f[0], "ecdsa-") && !strings.HasPrefix(f[0], "sk-") {
+			return
+		}
+		k := f[0] + " " + f[1]
+		if seen[k] {
+			return
+		}
+		seen[k] = true
+		keys = append(keys, strings.TrimSpace(line))
+	}
+	if b, err := os.ReadFile(filepath.Join(home, ".ssh", "authorized_keys")); err == nil {
+		for _, l := range strings.Split(string(b), "\n") {
+			add(l)
+		}
+	}
+	pubs, _ := filepath.Glob(filepath.Join(home, ".ssh", "*.pub"))
+	for _, p := range pubs {
+		if b, err := os.ReadFile(p); err == nil {
+			add(string(b))
+		}
+	}
+	jsonOK(w, 200, map[string]any{"keys": keys, "user": s.user})
+}
+
+// ---- locations: storage pools, added as plain-files pools at a path of his choosing ----
+
+func (s *Server) virtPoolCreate(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Name string `json:"name"`
+		Path string `json:"path"`
+	}
+	_ = readBody(r, &body, 8192)
+	p := filepath.Clean(body.Path)
+	name := strings.TrimSpace(body.Name)
+	if name == "" {
+		name = sensors.Seg(filepath.Base(p))
+	}
+	if !incus.ValidName(name) {
+		jsonErr(w, 400, "name: letters, digits and dashes, starting with a letter")
+		return
+	}
+	if !filepath.IsAbs(p) || p == "/" {
+		jsonErr(w, 400, "path: an absolute path to a folder on this machine")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	ctx, cancel := context.WithTimeout(r.Context(), 2*time.Minute)
+	defer cancel()
+	if st, err := os.Stat(p); err == nil && !st.IsDir() {
+		jsonErr(w, 400, p+" is a file, not a folder")
+		return
+	} else if err != nil {
+		mk := priv.Wrap("mkdir", "-p", p) // Incus wants the folder there; it fills it as root
+		if out, err := exec.CommandContext(ctx, mk[0], mk[1:]...).CombinedOutput(); err != nil {
+			jsonErr(w, 500, "could not make "+p+": "+strings.TrimSpace(string(out)))
+			return
+		}
+	}
+	if out, err := s.virt.Cmd(ctx, "storage", "create", name, "dir", "source="+p).CombinedOutput(); err != nil {
+		jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+		return
+	}
+	log.Printf("virt: location %s added at %s (from %s)", name, p, clientIP(r))
+	jsonOK(w, 200, map[string]string{"name": name, "path": p})
+}
+
+func (s *Server) virtPoolDelete(w http.ResponseWriter, r *http.Request) {
+	var body struct {
+		Name string `json:"name"`
+	}
+	_ = readBody(r, &body, 4096)
+	if !incus.ValidName(body.Name) {
+		jsonErr(w, 400, "bad name")
+		return
+	}
+	if !s.virtReady(w, r) {
+		return
+	}
+	ctx, cancel := context.WithTimeout(r.Context(), 2*time.Minute)
+	defer cancel()
+	// Incus refuses a pool anything still uses; that refusal is the answer
+	if out, err := s.virt.Cmd(ctx, "storage", "delete", body.Name).CombinedOutput(); err != nil {
+		jsonErr(w, 409, strings.TrimPrefix(strings.TrimSpace(string(out)), "Error: "))
+		return
+	}
+	log.Printf("virt: location %s removed (from %s)", body.Name, clientIP(r))
+	w.WriteHeader(204)
+}
@@ -265,7 +265,15 @@ func (s *Server) zfsSnapshotDelete(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	if err := s.storage.DestroySnapshot(r.Context(), body.Name, body.Recursive); err != nil {
-		jsonErr(w, 500, err.Error())
+		msg := err.Error()
+		switch {
+		case msg == "bad snapshot name":
+			jsonErr(w, 400, msg)
+		case strings.Contains(msg, "does not exist"):
+			jsonErr(w, 404, msg)
+		default:
+			jsonErr(w, 500, msg)
+		}
 		return
 	}
 	log.Printf("zfs snapshot %s destroyed by %s%s", body.Name, clientIP(r), map[bool]string{true: " (recursive)", false: ""}[body.Recursive])
@@ -1,14 +1,13 @@
 // Package compose runs docker compose the way a stack was deployed — which is not always
 // simply "on this host". A stack deployed by an orchestrator running inside its own
-// container records paths in that container's filesystem, so compose has to run in there;
-// a stack deployed to another machine over tcp needs DOCKER_HOST pointed at it. Both the
-// console and the scheduled updates it writes must invoke it identically, or a redeploy
-// from one would not match the other's labels.
+// container records paths in that container's filesystem, so compose has to run in there.
+// Both the console and the scheduled updates it writes must invoke it identically, or a
+// redeploy from one would not match the other's labels. Compose always drives this
+// machine's own Docker: a stack's files and its containers are on the same box.
 package compose

 import (
 	"context"
-	"os"
 	"os/exec"
 	"path/filepath"
 )
@@ -18,7 +17,6 @@ type Spec struct {
 	Project string   // -p
 	Files   []string // -f, in order
 	Via     string   // a container to run compose inside; "" is this host
-	Remote  string   // a DOCKER_HOST; "" is this machine's Docker
 	Tool    string   // "docker" or "podman"
 }

@@ -33,18 +31,12 @@ func Cmd(ctx context.Context, s Spec, args ...string) *exec.Cmd {
 		base = append(base, "-f", f)
 	}
 	if s.Via != "" {
-		pre := []string{"exec"}
-		if s.Remote != "" {
-			pre = append(pre, "-e", "DOCKER_HOST="+s.Remote)
-		}
-		return exec.CommandContext(ctx, tool, append(append(append(pre, s.Via, "docker"), base...), args...)...)
+		// The CLI inside the orchestrator's container is its own `docker`, whatever this host runs.
+		return exec.CommandContext(ctx, tool, append(append([]string{"exec", s.Via, "docker"}, base...), args...)...)
 	}
 	cmd := exec.CommandContext(ctx, tool, append(base, args...)...)
 	if len(s.Files) > 0 {
 		cmd.Dir = filepath.Dir(s.Files[0])
 	}
-	if s.Remote != "" {
-		cmd.Env = append(os.Environ(), "DOCKER_HOST="+s.Remote)
-	}
 	return cmd
 }
@@ -15,6 +15,7 @@ import (
 	"io"
 	"os"
 	"os/exec"
+	"os/signal"
 	"os/user"
 	"path/filepath"
 	"sort"
@@ -23,6 +24,7 @@ import (
 	"syscall"
 	"time"

+	"hamlab/internal/media"
 	"hamlab/internal/priv"
 )

@@ -37,6 +39,7 @@ type Entry struct {
 	Group   string `json:"group"`
 	Target  string `json:"target,omitempty"`  // link target
 	Broken  bool   `json:"broken,omitempty"`  // dangling link
+	Preview string `json:"preview,omitempty"` // "image" | "video": the Files tab can show a thumbnail of it
 }

 type Listing struct {
@@ -56,10 +59,12 @@ type FS interface {
 	List(ctx context.Context, path string) (Listing, error)
 	Stat(ctx context.Context, path string) (Info, error)
 	Open(ctx context.Context, path string) (io.ReadCloser, error)
+	OpenAt(ctx context.Context, path string, offset int64) (io.ReadCloser, error) // Open from a byte offset: a range request, a player seeking
 	Write(ctx context.Context, path string, r io.Reader) error
 	Mkdir(ctx context.Context, path string) error
 	Touch(ctx context.Context, path string) error
 	Rename(ctx context.Context, from, to string) error
+	Move(ctx context.Context, from, to string, progress io.Writer) error // Rename, or across filesystems a copy and a removal; long, so callers run it as a task
 	Delete(ctx context.Context, path string, recursive bool) error
 	Chmod(ctx context.Context, path string, perm os.FileMode) error
 }
@@ -137,7 +142,7 @@ func entryOf(dir, name string, lst os.FileInfo) Entry {
 		} else if st.IsDir() {
 			e.Type = "dir" // keep dir semantics for navigation; Target says it's a link
 		} else {
-			e.Size = st.Size()
+			e.Size, e.Mtime = st.Size(), st.ModTime().UnixMilli() // the file's, not the link's
 		}
 	case lst.IsDir():
 		e.Type = "dir"
@@ -146,6 +151,9 @@ func entryOf(dir, name string, lst os.FileInfo) Entry {
 	default:
 		e.Type = "other"
 	}
+	if e.Type == "file" || (e.Type == "link" && !e.Broken) {
+		e.Preview = media.Kind(name)
+	}
 	return e
 }

@@ -224,6 +232,20 @@ func (Local) Open(_ context.Context, path string) (io.ReadCloser, error) {
 	return os.Open(path)
 }

+func (l Local) OpenAt(ctx context.Context, path string, offset int64) (io.ReadCloser, error) {
+	f, err := l.Open(ctx, path)
+	if err != nil {
+		return nil, err
+	}
+	if offset > 0 {
+		if _, err := f.(*os.File).Seek(offset, io.SeekStart); err != nil {
+			f.Close()
+			return nil, err
+		}
+	}
+	return f, nil
+}
+
 // Write replaces the file's contents, keeping its mode; new files get 0644 (umask).
 func (Local) Write(_ context.Context, path string, r io.Reader) error {
 	f, err := os.OpenFile(path, os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0o644)
@@ -329,7 +351,15 @@ func (r *cmdReader) Close() error {
 }

 func (s Sudo) Open(ctx context.Context, path string) (io.ReadCloser, error) {
-	c := s.cmd(ctx, "read", path)
+	return s.open(ctx, "read", path)
+}
+
+func (s Sudo) OpenAt(ctx context.Context, path string, offset int64) (io.ReadCloser, error) {
+	return s.open(ctx, "read", "--offset", strconv.FormatInt(offset, 10), path)
+}
+
+func (s Sudo) open(ctx context.Context, args ...string) (io.ReadCloser, error) {
+	c := s.cmd(ctx, args...)
 	errb := &strings.Builder{}
 	c.Stderr = errb
 	out, err := c.StdoutPipe()
@@ -380,6 +410,30 @@ func (s Sudo) Touch(ctx context.Context, path string) error {
 func (s Sudo) Rename(ctx context.Context, from, to string) error {
 	return s.runJSON(ctx, nil, "rename", from, to)
 }
+
+// Move as root: the helper does the copying and talks on stdout.
+func (s Sudo) Move(ctx context.Context, from, to string, progress io.Writer) error {
+	c := s.cmd(ctx, "move", from, to)
+	c.Stdout = progress
+	var errb strings.Builder
+	c.Stderr = &errb
+	if err := c.Run(); err != nil {
+		if msg := strings.TrimSpace(errb.String()); msg != "" {
+			return errors.New(msg)
+		}
+		return err
+	}
+	return nil
+}
+
+// MoveCmd is the command a task runs for a long move: this binary's helper, as root when
+// the backend is.
+func MoveCmd(ctx context.Context, fsys FS, self, from, to string) *exec.Cmd {
+	if s, ok := fsys.(Sudo); ok {
+		return s.cmd(ctx, "move", from, to)
+	}
+	return exec.CommandContext(ctx, self, "fs", "move", from, to)
+}
 func (s Sudo) Delete(ctx context.Context, path string, recursive bool) error {
 	if recursive {
 		return s.runJSON(ctx, nil, "delete", "-r", path)
@@ -394,11 +448,16 @@ func (s Sudo) Chmod(ctx context.Context, path string, perm os.FileMode) error {
 func Helper(args []string, stdin io.Reader, stdout io.Writer, stderr io.Writer) int {
 	fail := func(err error) int { fmt.Fprintln(stderr, err.Error()); return 1 }
 	if len(args) < 2 {
-		return fail(errors.New("usage: hamlab fs <list|stat|read|write|mkdir|touch|rename|delete|chmod> …"))
+		return fail(errors.New("usage: hamlab fs <list|stat|read|write|mkdir|touch|rename|move|delete|chmod> …"))
 	}
 	ctx := context.Background()
 	var l Local
 	op := args[0]
+	var offset int64
+	if op == "read" && len(args) >= 4 && args[1] == "--offset" { // read --offset N <path>
+		offset, _ = strconv.ParseInt(args[2], 10, 64)
+		args = append([]string{"read"}, args[3:]...)
+	}
 	clean := func(i int) (string, error) {
 		if i >= len(args) {
 			return "", errors.New("path required")
@@ -425,7 +484,7 @@ func Helper(args []string, stdin io.Reader, stdout io.Writer, stderr io.Writer)
 			}
 			return emit(stdout, out, stderr)
 		case "read":
-			f, err := l.Open(ctx, p)
+			f, err := l.OpenAt(ctx, p, offset)
 			if err != nil {
 				return fail(err)
 			}
@@ -447,7 +506,7 @@ func Helper(args []string, stdin io.Reader, stdout io.Writer, stderr io.Writer)
 				return fail(err)
 			}
 		}
-	case "rename":
+	case "rename", "move":
 		from, err := clean(1)
 		if err != nil {
 			return fail(err)
@@ -456,6 +515,15 @@ func Helper(args []string, stdin io.Reader, stdout io.Writer, stderr io.Writer)
 		if err != nil {
 			return fail(err)
 		}
+		if op == "move" {
+			// A cancelled task is a SIGTERM: stop copying and take the partial copy away.
+			mctx, stop := signal.NotifyContext(ctx, syscall.SIGTERM, syscall.SIGINT)
+			defer stop()
+			if err := l.Move(mctx, from, to, stdout); err != nil {
+				return fail(err)
+			}
+			return 0
+		}
 		if err := l.Rename(ctx, from, to); err != nil {
 			return fail(err)
 		}
@@ -0,0 +1,197 @@
+package files
+
+import (
+	"context"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+)
+
+// IsCrossDevice reports a rename refused because the two ends are on different
+// filesystems — on a NAS that is every move between datasets. The Sudo backend only has
+// the helper's words for it.
+func IsCrossDevice(err error) bool {
+	return errors.Is(err, syscall.EXDEV) || (err != nil && strings.Contains(err.Error(), "cross-device"))
+}
+
+// Inside reports whether to lies within from — a folder cannot be moved into itself.
+func Inside(from, to string) bool {
+	return to == from || strings.HasPrefix(to, strings.TrimSuffix(from, "/")+"/")
+}
+
+// Move is Rename, and across filesystems a copy and a removal. The copy is built under a
+// hidden temporary name beside where it will land and renamed into place only once it is
+// complete, and the source is removed only after that: a failure part-way, or a cancel,
+// leaves the source exactly as it was. Progress goes to w, a line at a time, for the task
+// output that a long move is watched through.
+func (Local) Move(ctx context.Context, from, to string, w io.Writer) error {
+	if protected[from] {
+		return errors.New("refusing to move " + from)
+	}
+	if Inside(from, to) {
+		return errors.New("a folder can't be moved into itself")
+	}
+	if _, err := os.Lstat(to); err == nil {
+		return errors.New("destination exists")
+	}
+	err := os.Rename(from, to)
+	if err == nil || !IsCrossDevice(err) {
+		return err
+	}
+	return moveByCopy(ctx, from, to, w)
+}
+
+// moveByCopy is the slow path: copy, rename into place, remove the original.
+func moveByCopy(ctx context.Context, from, to string, w io.Writer) error {
+	st, err := os.Lstat(from)
+	if err != nil {
+		return err
+	}
+	tmp := filepath.Join(filepath.Dir(to), "."+filepath.Base(to)+".hamlab-moving")
+	_ = os.RemoveAll(tmp) // a previous attempt that died
+	fmt.Fprintf(w, "%s is on another filesystem: copying, then removing the original\n", filepath.Dir(to))
+	p := &progress{w: w}
+	if err := copyPath(ctx, from, tmp, st, p); err != nil {
+		fmt.Fprintln(w, "copy failed; removing the partial copy, the original is untouched")
+		_ = os.RemoveAll(tmp)
+		return err
+	}
+	if err := os.Rename(tmp, to); err != nil {
+		_ = os.RemoveAll(tmp)
+		return err
+	}
+	fmt.Fprintf(w, "copied %s; removing the original\n", p.String())
+	if err := os.RemoveAll(from); err != nil {
+		return fmt.Errorf("copied to %s, but the original could not be removed: %w", to, err)
+	}
+	fmt.Fprintf(w, "moved %s to %s\n", from, to)
+	return nil
+}
+
+type progress struct {
+	w          io.Writer
+	files      int64
+	bytes      int64
+	shownFiles int64
+	shownBytes int64
+}
+
+func (p *progress) add(files, bytes int64) {
+	p.files += files
+	p.bytes += bytes
+	if p.files-p.shownFiles >= 500 || p.bytes-p.shownBytes >= 512<<20 {
+		fmt.Fprintf(p.w, "copying… %s\n", p.String())
+		p.shownFiles, p.shownBytes = p.files, p.bytes
+	}
+}
+
+func (p *progress) String() string {
+	return fmt.Sprintf("%d files, %s", p.files, fmtSize(p.bytes))
+}
+
+func fmtSize(b int64) string {
+	const unit = 1024
+	if b < unit {
+		return fmt.Sprintf("%d B", b)
+	}
+	div, exp := int64(unit), 0
+	for n := b / unit; n >= unit && exp < 4; n /= unit {
+		div *= unit
+		exp++
+	}
+	return fmt.Sprintf("%.1f %ciB", float64(b)/float64(div), "KMGTP"[exp])
+}
+
+// copyPath copies one entry of any kind, recursively for a directory, keeping mode, times
+// and — when running as root — ownership. Devices, pipes and sockets are refused: a copy
+// of one is not the thing itself.
+func copyPath(ctx context.Context, src, dst string, st os.FileInfo, p *progress) error {
+	if err := ctx.Err(); err != nil {
+		return err
+	}
+	mode := st.Mode()
+	switch {
+	case mode&os.ModeSymlink != 0:
+		target, err := os.Readlink(src)
+		if err != nil {
+			return err
+		}
+		if err := os.Symlink(target, dst); err != nil {
+			return err
+		}
+		chown(dst, st)
+		p.add(1, 0)
+		return nil
+	case mode.IsDir():
+		if err := os.Mkdir(dst, mode.Perm()|0o700); err != nil { // writable while it fills, exact mode after
+			return err
+		}
+		ents, err := os.ReadDir(src)
+		if err != nil {
+			return err
+		}
+		for _, e := range ents {
+			lst, err := e.Info()
+			if err != nil {
+				return err
+			}
+			if err := copyPath(ctx, filepath.Join(src, e.Name()), filepath.Join(dst, e.Name()), lst, p); err != nil {
+				return err
+			}
+		}
+		chown(dst, st)
+		if err := os.Chmod(dst, mode.Perm()); err != nil {
+			return err
+		}
+		return os.Chtimes(dst, st.ModTime(), st.ModTime())
+	case mode.IsRegular():
+		n, err := copyFile(src, dst, st)
+		if err != nil {
+			return err
+		}
+		p.add(1, n)
+		return nil
+	default:
+		return fmt.Errorf("%s: can't copy a device, pipe or socket", src)
+	}
+}
+
+func copyFile(src, dst string, st os.FileInfo) (int64, error) {
+	in, err := os.Open(src)
+	if err != nil {
+		return 0, err
+	}
+	defer in.Close()
+	out, err := os.OpenFile(dst, os.O_WRONLY|os.O_CREATE|os.O_EXCL, st.Mode().Perm())
+	if err != nil {
+		return 0, err
+	}
+	n, err := io.Copy(out, in)
+	if err != nil {
+		out.Close()
+		return n, err
+	}
+	if err := out.Close(); err != nil {
+		return n, err
+	}
+	chown(dst, st)
+	if err := os.Chmod(dst, st.Mode().Perm()); err != nil { // umask has no say
+		return n, err
+	}
+	return n, os.Chtimes(dst, st.ModTime(), st.ModTime())
+}
+
+// chown keeps the owner when this process may set one; an ordinary user's copy is the
+// user's, which is what a rename would have left anyway.
+func chown(dst string, st os.FileInfo) {
+	if os.Geteuid() != 0 {
+		return
+	}
+	if sys, ok := st.Sys().(*syscall.Stat_t); ok {
+		_ = os.Lchown(dst, int(sys.Uid), int(sys.Gid))
+	}
+}
@@ -0,0 +1,195 @@
+package files
+
+import (
+	"context"
+	"errors"
+	"os"
+	"path/filepath"
+	"strings"
+	"syscall"
+	"testing"
+	"time"
+)
+
+func TestInside(t *testing.T) {
+	for _, c := range []struct {
+		from, to string
+		want     bool
+	}{
+		{"/a/b", "/a/b", true}, {"/a/b", "/a/b/c", true}, {"/a/b", "/a/bc", false}, {"/a/b", "/a", false}, {"/", "/x", true},
+	} {
+		if got := Inside(c.from, c.to); got != c.want {
+			t.Errorf("Inside(%q, %q) = %v, want %v", c.from, c.to, got, c.want)
+		}
+	}
+}
+
+func TestIsCrossDevice(t *testing.T) {
+	if !IsCrossDevice(&os.LinkError{Op: "rename", Old: "/a", New: "/b", Err: syscall.EXDEV}) {
+		t.Fatal("the kernel's EXDEV")
+	}
+	if !IsCrossDevice(errors.New("rename /a /b: invalid cross-device link")) {
+		t.Fatal("the helper's words for it")
+	}
+	if IsCrossDevice(errors.New("permission denied")) || IsCrossDevice(nil) {
+		t.Fatal("anything else is not")
+	}
+}
+
+// The copy path, exercised directly: a tree with nested folders, a symlink, an odd mode
+// and old mtimes lands whole under the new name, and the original is gone only then.
+func TestMoveByCopy(t *testing.T) {
+	root := t.TempDir()
+	src := filepath.Join(root, "src", "album")
+	if err := os.MkdirAll(filepath.Join(src, "sub", "deep"), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	old := time.Date(2020, 1, 2, 3, 4, 5, 0, time.UTC)
+	write := func(p, s string, mode os.FileMode) {
+		if err := os.WriteFile(p, []byte(s), mode); err != nil {
+			t.Fatal(err)
+		}
+		_ = os.Chmod(p, mode)
+		_ = os.Chtimes(p, old, old)
+	}
+	write(filepath.Join(src, "a.txt"), "hello", 0o644)
+	write(filepath.Join(src, "sub", "deep", "b.bin"), strings.Repeat("x", 100000), 0o600)
+	write(filepath.Join(src, "run.sh"), "#!/bin/sh\n", 0o755)
+	if err := os.Symlink("a.txt", filepath.Join(src, "link")); err != nil {
+		t.Fatal(err)
+	}
+	_ = os.Chtimes(filepath.Join(src, "sub"), old, old)
+
+	dst := filepath.Join(root, "dst", "moved")
+	if err := os.MkdirAll(filepath.Dir(dst), 0o755); err != nil {
+		t.Fatal(err)
+	}
+	var out strings.Builder
+	if err := moveByCopy(context.Background(), src, dst, &out); err != nil {
+		t.Fatal(err)
+	}
+	if _, err := os.Lstat(src); !os.IsNotExist(err) {
+		t.Fatal("the original is still there")
+	}
+	if b, _ := os.ReadFile(filepath.Join(dst, "a.txt")); string(b) != "hello" {
+		t.Fatal("a.txt")
+	}
+	if st, err := os.Stat(filepath.Join(dst, "sub", "deep", "b.bin")); err != nil || st.Size() != 100000 || st.Mode().Perm() != 0o600 || !st.ModTime().Equal(old) {
+		t.Fatalf("b.bin: %v %v", st, err)
+	}
+	if st, _ := os.Stat(filepath.Join(dst, "run.sh")); st.Mode().Perm() != 0o755 {
+		t.Fatal("mode lost")
+	}
+	if target, err := os.Readlink(filepath.Join(dst, "link")); err != nil || target != "a.txt" {
+		t.Fatal("symlink not copied as a symlink")
+	}
+	if st, _ := os.Stat(filepath.Join(dst, "sub")); !st.ModTime().Equal(old) {
+		t.Fatal("folder mtime lost")
+	}
+	if left, _ := filepath.Glob(filepath.Join(root, "dst", ".*hamlab-moving*")); len(left) != 0 {
+		t.Fatal("temporary copy left behind")
+	}
+	if !strings.Contains(out.String(), "moved ") || !strings.Contains(out.String(), "4 files") {
+		t.Fatalf("progress said: %q", out.String())
+	}
+}
+
+// A failure part-way leaves the original as it was and no partial copy.
+func TestMoveByCopyFailsClean(t *testing.T) {
+	root := t.TempDir()
+	src := filepath.Join(root, "src")
+	if err := os.MkdirAll(src, 0o755); err != nil {
+		t.Fatal(err)
+	}
+	if err := os.WriteFile(filepath.Join(src, "a"), []byte("a"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := syscall.Mkfifo(filepath.Join(src, "pipe"), 0o644); err != nil {
+		t.Skip("no fifos here")
+	}
+	dst := filepath.Join(root, "dst")
+	err := moveByCopy(context.Background(), src, dst, &strings.Builder{})
+	if err == nil || !strings.Contains(err.Error(), "pipe") {
+		t.Fatalf("expected the pipe to be refused, got %v", err)
+	}
+	if _, err := os.Stat(filepath.Join(src, "a")); err != nil {
+		t.Fatal("the original was touched")
+	}
+	if _, err := os.Lstat(dst); !os.IsNotExist(err) {
+		t.Fatal("a partial copy was left")
+	}
+	if left, _ := filepath.Glob(filepath.Join(root, ".*hamlab-moving*")); len(left) != 0 {
+		t.Fatal("temporary copy left behind")
+	}
+	// a cancel is the same story
+	if err := os.Remove(filepath.Join(src, "pipe")); err != nil {
+		t.Fatal(err)
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	cancel()
+	if err := moveByCopy(ctx, src, dst, &strings.Builder{}); err == nil {
+		t.Fatal("a cancelled move must fail")
+	}
+	if _, err := os.Stat(filepath.Join(src, "a")); err != nil {
+		t.Fatal("the original was touched by a cancel")
+	}
+}
+
+// Move on one filesystem is a rename: nothing is copied, and the guards hold.
+func TestMoveSameFilesystem(t *testing.T) {
+	root := t.TempDir()
+	src := filepath.Join(root, "f")
+	if err := os.WriteFile(src, []byte("x"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	var l Local
+	var out strings.Builder
+	if err := l.Move(context.Background(), src, filepath.Join(root, "g"), &out); err != nil {
+		t.Fatal(err)
+	}
+	if out.Len() != 0 {
+		t.Fatal("a rename has nothing to say")
+	}
+	if _, err := os.Stat(filepath.Join(root, "g")); err != nil {
+		t.Fatal("not renamed")
+	}
+	if err := l.Move(context.Background(), root, filepath.Join(root, "inside"), &out); err == nil {
+		t.Fatal("into itself")
+	}
+	if err := l.Move(context.Background(), filepath.Join(root, "g"), filepath.Join(root, "g"), &out); err == nil {
+		t.Fatal("onto itself")
+	}
+	if err := os.WriteFile(filepath.Join(root, "h"), nil, 0o644); err != nil {
+		t.Fatal(err)
+	}
+	if err := l.Move(context.Background(), filepath.Join(root, "g"), filepath.Join(root, "h"), &out); err == nil || !strings.Contains(err.Error(), "exists") {
+		t.Fatalf("onto an existing file: %v", err)
+	}
+}
+
+// A link to a file carries the file's size and time, so the row and the preview key follow
+// the file; a link to a folder is a folder; a link to nothing says so.
+func TestEntryOfLinks(t *testing.T) {
+	dir := t.TempDir()
+	if err := os.WriteFile(filepath.Join(dir, "f"), []byte("12345"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	old := time.Date(2021, 1, 1, 0, 0, 0, 0, time.UTC)
+	_ = os.Chtimes(filepath.Join(dir, "f"), old, old)
+	_ = os.Mkdir(filepath.Join(dir, "d"), 0o755)
+	for _, l := range [][2]string{{"lf", "f"}, {"ld", "d"}, {"lx", "nowhere"}} {
+		if err := os.Symlink(l[1], filepath.Join(dir, l[0])); err != nil {
+			t.Fatal(err)
+		}
+	}
+	ent := func(n string) Entry { st, _ := os.Lstat(filepath.Join(dir, n)); return entryOf(dir, n, st) }
+	if e := ent("lf"); e.Type != "link" || e.Size != 5 || e.Mtime != old.UnixMilli() || e.Target != "f" || e.Broken {
+		t.Fatalf("link to file: %+v", e)
+	}
+	if e := ent("ld"); e.Type != "dir" || e.Target != "d" {
+		t.Fatalf("link to dir: %+v", e)
+	}
+	if e := ent("lx"); e.Type != "link" || !e.Broken || e.Preview != "" {
+		t.Fatalf("dangling: %+v", e)
+	}
+}
@@ -0,0 +1,89 @@
+package files
+
+import (
+	"context"
+	"errors"
+	"io"
+)
+
+// Seeker is an FS file as http.ServeContent wants one — something to seek in — for a file
+// whose size is already known from a stat. ServeContent seeks to the end for the size, to
+// the start of the range asked for, then reads: so the backend is opened once, at that
+// position, and only ever read forward. The Sudo backend's helper is started at the offset
+// rather than streamed from the top and skipped.
+type Seeker struct {
+	ctx  context.Context
+	fsys FS
+	path string
+	size int64
+	pos  int64 // where the next Read reads from
+	at   int64 // where cur is positioned, when open
+	cur  io.ReadCloser
+}
+
+func NewSeeker(ctx context.Context, fsys FS, path string, size int64) *Seeker {
+	return &Seeker{ctx: ctx, fsys: fsys, path: path, size: size}
+}
+
+// Check opens the file now, from the start, so a file that cannot be read is known before
+// any headers go out. Seeking costs nothing; a Read from somewhere else reopens there.
+func (s *Seeker) Check() error {
+	if s.cur != nil {
+		return nil
+	}
+	f, err := s.fsys.OpenAt(s.ctx, s.path, 0)
+	if err != nil {
+		return err
+	}
+	s.cur, s.at = f, 0
+	return nil
+}
+
+func (s *Seeker) Seek(offset int64, whence int) (int64, error) {
+	var pos int64
+	switch whence {
+	case io.SeekStart:
+		pos = offset
+	case io.SeekCurrent:
+		pos = s.pos + offset
+	case io.SeekEnd:
+		pos = s.size + offset
+	default:
+		return 0, errors.New("bad whence")
+	}
+	if pos < 0 {
+		return 0, errors.New("seek before start")
+	}
+	s.pos = pos // the stream, if open, stays where it is until a Read wants somewhere else
+	return pos, nil
+}
+
+func (s *Seeker) Read(p []byte) (int, error) {
+	if s.pos >= s.size {
+		return 0, io.EOF
+	}
+	if s.cur != nil && s.pos != s.at {
+		s.cur.Close()
+		s.cur = nil
+	}
+	if s.cur == nil {
+		f, err := s.fsys.OpenAt(s.ctx, s.path, s.pos)
+		if err != nil {
+			return 0, err
+		}
+		s.cur, s.at = f, s.pos
+	}
+	n, err := s.cur.Read(p)
+	s.pos += int64(n)
+	s.at += int64(n)
+	return n, err
+}
+
+func (s *Seeker) Close() error {
+	if s.cur == nil {
+		return nil
+	}
+	err := s.cur.Close()
+	s.cur = nil
+	return err
+}
@@ -0,0 +1,112 @@
+package files
+
+import (
+	"context"
+	"io"
+	"os"
+	"path/filepath"
+	"testing"
+)
+
+import "strings"
+
+type stringsBuilder = strings.Builder
+
+type countingFS struct {
+	Local
+	opens []int64
+}
+
+func (c *countingFS) OpenAt(ctx context.Context, path string, off int64) (io.ReadCloser, error) {
+	c.opens = append(c.opens, off)
+	return c.Local.OpenAt(ctx, path, off)
+}
+
+// ServeContent's moves — size from the end, seek to the range, read forward — open the
+// backend once, at the range; a seek to where the stream already is costs nothing.
+func TestSeeker(t *testing.T) {
+	p := filepath.Join(t.TempDir(), "f")
+	data := make([]byte, 1000)
+	for i := range data {
+		data[i] = byte(i)
+	}
+	if err := os.WriteFile(p, data, 0o644); err != nil {
+		t.Fatal(err)
+	}
+	fs := &countingFS{}
+	s := NewSeeker(context.Background(), fs, p, int64(len(data)))
+	if n, _ := s.Seek(0, io.SeekEnd); n != 1000 {
+		t.Fatalf("end = %d", n)
+	}
+	if _, err := s.Seek(100, io.SeekStart); err != nil {
+		t.Fatal(err)
+	}
+	buf := make([]byte, 50)
+	if n, err := io.ReadFull(s, buf); err != nil || n != 50 || buf[0] != 100 || buf[49] != 149 {
+		t.Fatalf("read at 100: %d %v %v", n, err, buf[:2])
+	}
+	if _, err := s.Seek(150, io.SeekStart); err != nil { // where it already is
+		t.Fatal(err)
+	}
+	if n, _ := io.ReadFull(s, buf); n != 50 || buf[0] != 150 {
+		t.Fatal("read after a no-op seek")
+	}
+	if len(fs.opens) != 1 || fs.opens[0] != 100 {
+		t.Fatalf("opens = %v, want [100]", fs.opens)
+	}
+	if _, err := s.Seek(0, io.SeekStart); err != nil {
+		t.Fatal(err)
+	}
+	rest, err := io.ReadAll(s)
+	if err != nil || len(rest) != 1000 || rest[999] != data[999] {
+		t.Fatalf("read all from the start: %d %v", len(rest), err)
+	}
+	if len(fs.opens) != 2 || fs.opens[1] != 0 {
+		t.Fatalf("opens = %v, want [100 0]", fs.opens)
+	}
+	if n, err := s.Read(buf); n != 0 || err != io.EOF {
+		t.Fatal("past the end is EOF")
+	}
+	if _, err := s.Seek(-1, io.SeekStart); err == nil {
+		t.Fatal("before the start")
+	}
+	if err := s.Close(); err != nil {
+		t.Fatal(err)
+	}
+	// Check opens at the start and keeps that stream for a read from the start
+	s2 := NewSeeker(context.Background(), fs, p, 1000)
+	if err := s2.Check(); err != nil {
+		t.Fatal(err)
+	}
+	s2.Seek(0, io.SeekEnd)
+	s2.Seek(0, io.SeekStart)
+	if n, _ := io.ReadFull(s2, buf); n != 50 || buf[0] != 0 {
+		t.Fatal("read from the start after Check")
+	}
+	if len(fs.opens) != 3 {
+		t.Fatalf("Check's open was not reused: %v", fs.opens)
+	}
+	s2.Close()
+	if err := NewSeeker(context.Background(), fs, filepath.Join(t.TempDir(), "nope"), 5).Check(); err == nil {
+		t.Fatal("Check must report a file that can't be opened")
+	}
+}
+
+// The helper's read takes an offset, for the Sudo backend.
+func TestHelperReadOffset(t *testing.T) {
+	p := filepath.Join(t.TempDir(), "f")
+	if err := os.WriteFile(p, []byte("0123456789"), 0o644); err != nil {
+		t.Fatal(err)
+	}
+	var out, errb stringsBuilder
+	if rc := Helper([]string{"read", "--offset", "7", p}, nil, &out, &errb); rc != 0 {
+		t.Fatalf("rc %d: %s", rc, errb.String())
+	}
+	if out.String() != "789" {
+		t.Fatalf("got %q", out.String())
+	}
+	out.Reset()
+	if rc := Helper([]string{"read", p}, nil, &out, &errb); rc != 0 || out.String() != "0123456789" {
+		t.Fatalf("plain read: rc %d %q", rc, out.String())
+	}
+}
@@ -0,0 +1,232 @@
+package incus
+
+// Nightly exports: every instance as a tarball in virt/exports/<name>/, kept to a count, as a
+// cron line like the ZFS schedules — `hamlab virt-export` in /etc/cron.d/hamlab-virt — so the
+// backup runs whether or not the console is up. The settings and the last run's record are
+// files beside the data, not state.json, because the cron job is a separate process.
+
+import (
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"hamlab/internal/store"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"sort"
+	"strings"
+	"time"
+)
+
+const CronFile = "/etc/cron.d/hamlab-virt"
+
+type ExportConfig struct {
+	Enabled      bool      `json:"enabled"`
+	Hour         int       `json:"hour"`
+	Minute       int       `json:"minute"`
+	Keep         int       `json:"keep"`                // newest exports kept per instance
+	InstanceOnly bool      `json:"instance_only"`       // leave the snapshots out of the tarball
+	Instances    []string  `json:"instances,omitempty"` // empty: every instance
+	Updated      time.Time `json:"updated,omitempty"`
+}
+
+func DefaultExportConfig() ExportConfig {
+	return ExportConfig{Hour: 2, Minute: 15, Keep: 3, InstanceOnly: true}
+}
+
+func (c ExportConfig) Validate() error {
+	if c.Hour < 0 || c.Hour > 23 || c.Minute < 0 || c.Minute > 59 {
+		return errors.New("time: hour 0–23, minute 0–59")
+	}
+	if c.Keep < 1 || c.Keep > 100 {
+		return errors.New("keep: between 1 and 100")
+	}
+	for _, n := range c.Instances {
+		if !ValidName(n) {
+			return errors.New("instance: " + n)
+		}
+	}
+	return nil
+}
+
+func (c ExportConfig) CronExpr() string { return fmt.Sprintf("%d %d * * *", c.Minute, c.Hour) }
+
+// NextRun is the next time the line fires, for the page.
+func (c ExportConfig) NextRun(now time.Time) time.Time {
+	n := time.Date(now.Year(), now.Month(), now.Day(), c.Hour, c.Minute, 0, 0, now.Location())
+	if !n.After(now) {
+		n = n.Add(24 * time.Hour)
+	}
+	return n
+}
+
+// CronText is the whole file; rewritten on every change, never edited.
+func (c ExportConfig) CronText(user, exe, config string) string {
+	var b strings.Builder
+	b.WriteString("# Ham Lab instance exports — written by the Virtualization tab, rewritten whole on every change.\n")
+	b.WriteString("# Edit it there, not here.\n")
+	b.WriteString("SHELL=/bin/sh\nPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin\n\n")
+	fmt.Fprintf(&b, "# every instance to virt/exports, keep %d each\n", c.Keep)
+	fmt.Fprintf(&b, "%s %s %s -config %s virt-export\n", c.CronExpr(), user, exe, config)
+	return b.String()
+}
+
+func (m *Manager) exportConfigPath() string { return filepath.Join(m.dir, "exports.json") }
+func (m *Manager) exportRunPath() string    { return filepath.Join(m.dir, "export-runs.json") }
+
+func (m *Manager) ExportConfig() ExportConfig {
+	c := DefaultExportConfig()
+	if b, err := os.ReadFile(m.exportConfigPath()); err == nil {
+		_ = json.Unmarshal(b, &c)
+	}
+	return c
+}
+
+func (m *Manager) SaveExportConfig(c ExportConfig) error {
+	if err := c.Validate(); err != nil {
+		return err
+	}
+	if err := m.EnsureDirs(); err != nil {
+		return err
+	}
+	c.Updated = time.Now()
+	b, _ := json.MarshalIndent(c, "", "  ")
+	return store.WriteFileAtomic(m.exportConfigPath(), b, 0o644)
+}
+
+type ExportRun struct {
+	At       time.Time `json:"at"`
+	Exported []string  `json:"exported"`
+	Pruned   []string  `json:"pruned"`
+	Errors   []string  `json:"errors,omitempty"`
+	Seconds  float64   `json:"seconds"`
+}
+
+func (m *Manager) LastExportRun() *ExportRun {
+	b, err := os.ReadFile(m.exportRunPath())
+	if err != nil {
+		return nil
+	}
+	var r ExportRun
+	if json.Unmarshal(b, &r) != nil {
+		return nil
+	}
+	return &r
+}
+
+// ExportFile is one tarball in the exports tree.
+type ExportFile struct {
+	Instance string    `json:"instance"`
+	Name     string    `json:"name"`
+	Size     int64     `json:"size"`
+	Modified time.Time `json:"modified"`
+}
+
+func (m *Manager) ExportFiles() []ExportFile {
+	out := []ExportFile{}
+	dirs, _ := os.ReadDir(m.ExportsDir())
+	for _, d := range dirs {
+		if !d.IsDir() {
+			continue
+		}
+		files, _ := os.ReadDir(filepath.Join(m.ExportsDir(), d.Name()))
+		for _, f := range files {
+			if f.IsDir() || strings.HasSuffix(f.Name(), ".part") {
+				continue
+			}
+			if info, err := f.Info(); err == nil {
+				out = append(out, ExportFile{Instance: d.Name(), Name: f.Name(), Size: info.Size(), Modified: info.ModTime()})
+			}
+		}
+	}
+	sort.Slice(out, func(i, j int) bool {
+		if out[i].Instance != out[j].Instance {
+			return out[i].Instance < out[j].Instance
+		}
+		return out[i].Modified.After(out[j].Modified)
+	})
+	return out
+}
+
+// RunExports exports the named instances (or every one when names is empty) and prunes each
+// instance's folder to the configured count. Output goes to w line by line for a task to show.
+func (m *Manager) RunExports(ctx context.Context, names []string, w func(string)) ExportRun {
+	start := time.Now()
+	c := m.ExportConfig()
+	run := ExportRun{At: start, Exported: []string{}, Pruned: []string{}}
+	if err := m.EnsureDirs(); err != nil {
+		run.Errors = append(run.Errors, err.Error())
+		return run
+	}
+	all, err := m.Instances(ctx)
+	if err != nil {
+		run.Errors = append(run.Errors, "listing instances: "+err.Error())
+		return run
+	}
+	want := map[string]bool{}
+	for _, n := range names {
+		want[n] = true
+	}
+	if len(names) == 0 && len(c.Instances) > 0 {
+		for _, n := range c.Instances {
+			want[n] = true
+		}
+	}
+	for _, in := range all {
+		if len(want) > 0 && !want[in.Name] {
+			continue
+		}
+		dir := filepath.Join(m.ExportsDir(), in.Name)
+		if err := os.MkdirAll(dir, 0o755); err != nil {
+			run.Errors = append(run.Errors, in.Name+": "+err.Error())
+			continue
+		}
+		stamp := start.Format("2006-01-02_15.04")
+		final := filepath.Join(dir, fmt.Sprintf("%s-%s.tar.gz", in.Name, stamp))
+		part := final + ".part"
+		args := []string{"export", in.Name, part}
+		if c.InstanceOnly {
+			args = append(args, "--instance-only")
+		}
+		w(fmt.Sprintf("exporting %s …", in.Name))
+		cctx, cancel := context.WithTimeout(ctx, 2*time.Hour)
+		out, err := exec.CommandContext(cctx, "incus", args...).CombinedOutput()
+		cancel()
+		if err != nil {
+			_ = os.Remove(part)
+			msg := strings.TrimSpace(string(out))
+			if msg == "" {
+				msg = err.Error()
+			}
+			run.Errors = append(run.Errors, in.Name+": "+msg)
+			w("  failed: " + msg)
+			continue
+		}
+		if err := os.Rename(part, final); err != nil {
+			run.Errors = append(run.Errors, in.Name+": "+err.Error())
+			continue
+		}
+		if st, err := os.Stat(final); err == nil {
+			w(fmt.Sprintf("  %s (%.1f MiB)", filepath.Base(final), float64(st.Size())/(1<<20)))
+		}
+		run.Exported = append(run.Exported, filepath.Base(final))
+		// prune: newest first, keep c.Keep
+		var files []ExportFile
+		for _, f := range m.ExportFiles() {
+			if f.Instance == in.Name {
+				files = append(files, f)
+			}
+		}
+		for i := c.Keep; i < len(files); i++ {
+			if err := os.Remove(filepath.Join(dir, files[i].Name)); err == nil {
+				run.Pruned = append(run.Pruned, files[i].Name)
+				w("  pruned " + files[i].Name)
+			}
+		}
+	}
+	run.Seconds = time.Since(start).Seconds()
+	b, _ := json.MarshalIndent(run, "", "  ")
+	_ = store.WriteFileAtomic(m.exportRunPath(), b, 0o644)
+	return run
+}
@@ -28,7 +28,7 @@ import (
 )

 const (
-	PoolName   = "default"
+	PoolName   = "local" // plain files on the machine's own disk, in Ham Lab's folder
 	BridgeName = "incusbr0"
 	ZPoolName  = "hamlab-virt" // the ZFS pool made on the backing file; Incus is handed it by name
 	AdminGroup = "incus-admin"
@@ -57,7 +57,8 @@ type Manager struct {
 	version string

 	mu      sync.Mutex
-	cpuPrev map[string]cpuMark
+	cpuPrev map[string]map[string]cpuMark // caller → instance → last reading, so two readers do not spoil each other's deltas
+	vga     map[string]*vgaSession        // instance → the console operation its browser channels share
 	remote  struct {
 		at   time.Time
 		list []Image
@@ -75,7 +76,7 @@ type cpuMark struct {
 }

 func New(dataDir, user, version string) *Manager {
-	return &Manager{dir: filepath.Join(dataDir, "virt"), user: user, version: version, cpuPrev: map[string]cpuMark{}}
+	return &Manager{dir: filepath.Join(dataDir, "virt"), user: user, version: version, cpuPrev: map[string]map[string]cpuMark{}}
 }

 func (m *Manager) Dir() string       { return m.dir }
@@ -512,6 +513,12 @@ func secretKey(k string) bool {
 }

 func (m *Manager) Instances(ctx context.Context) ([]Instance, error) {
+	return m.InstancesFor(ctx, "api")
+}
+
+// InstancesFor is Instances with its own CPU history per caller: the page and the sensors
+// both read, at different rates, and a shared "previous reading" would give each the other's delta.
+func (m *Manager) InstancesFor(ctx context.Context, caller string) ([]Instance, error) {
 	c, cancel := context.WithTimeout(ctx, 30*time.Second)
 	defer cancel()
 	out, err := m.run(c, "list", "--format", "json")
@@ -525,6 +532,11 @@ func (m *Manager) Instances(ctx context.Context) ([]Instance, error) {
 	now := time.Now()
 	m.mu.Lock()
 	defer m.mu.Unlock()
+	prevs := m.cpuPrev[caller]
+	if prevs == nil {
+		prevs = map[string]cpuMark{}
+		m.cpuPrev[caller] = prevs
+	}
 	seen := map[string]bool{}
 	var list []Instance
 	for _, r := range raw {
@@ -577,18 +589,18 @@ func (m *Manager) Instances(ctx context.Context) ([]Instance, error) {
 				}
 			}
 			if r.Status == "Running" {
-				if prev, ok := m.cpuPrev[r.Name]; ok && now.After(prev.at) && r.State.CPU.Usage >= prev.ns {
+				if prev, ok := prevs[r.Name]; ok && now.After(prev.at) && r.State.CPU.Usage >= prev.ns {
 					in.CPUPct = float64(r.State.CPU.Usage-prev.ns) / float64(now.Sub(prev.at).Nanoseconds()) * 100
 				}
-				m.cpuPrev[r.Name] = cpuMark{ns: r.State.CPU.Usage, at: now}
+				prevs[r.Name] = cpuMark{ns: r.State.CPU.Usage, at: now}
 				seen[r.Name] = true
 			}
 		}
 		list = append(list, in)
 	}
-	for n := range m.cpuPrev {
+	for n := range prevs {
 		if !seen[n] {
-			delete(m.cpuPrev, n)
+			delete(prevs, n)
 		}
 	}
 	if list == nil {
@@ -603,11 +615,38 @@ type Pool struct {
 	Name   string `json:"name"`
 	Driver string `json:"driver"`
 	Source string `json:"source"`
+	Where  string `json:"where"` // in words: what disk this is, so a pool is picked by place, not by driver
 	Used   uint64 `json:"used"`
 	Total  uint64 `json:"total"`
 	UsedBy int    `json:"used_by"`
 }

+// poolWhere describes a pool by where its bytes land.
+func (m *Manager) poolWhere(driver, source string) string {
+	inHam := strings.HasPrefix(source, m.dir+"/") || source == m.dir
+	switch driver {
+	case "dir":
+		if inHam {
+			return "this machine's own disk — plain files, each disk sized on its own"
+		}
+		return "plain files at " + source
+	case "zfs":
+		if strings.HasSuffix(source, ".img") || source == ZPoolName {
+			return "a ZFS pool inside one file on this machine's disk"
+		}
+		if strings.Contains(source, "/") {
+			return "ZFS dataset " + source
+		}
+		return "ZFS pool " + source
+	case "btrfs":
+		if inHam {
+			return "btrfs inside one file on this machine's disk"
+		}
+		return "btrfs at " + source
+	}
+	return driver + " at " + source
+}
+
 type Network struct {
 	Name    string `json:"name"`
 	Type    string `json:"type"`
@@ -635,7 +674,7 @@ func (m *Manager) Pools(ctx context.Context) []Pool {
 	}
 	var out2 []Pool
 	for _, p := range raw {
-		pool := Pool{Name: p.Name, Driver: p.Driver, Source: p.Config["source"], UsedBy: len(p.UsedBy)}
+		pool := Pool{Name: p.Name, Driver: p.Driver, Source: p.Config["source"], Where: m.poolWhere(p.Driver, p.Config["source"]), UsedBy: len(p.UsedBy)}
 		if b, err := m.run(c, "query", "/1.0/storage-pools/"+p.Name+"/resources"); err == nil {
 			var res struct {
 				Space struct {
@@ -652,6 +691,24 @@ func (m *Manager) Pools(ctx context.Context) []Pool {
 	return out2
 }

+// DefaultPool is where a new instance's disk goes unless the form says otherwise: the pool
+// on the default profile's root device.
+func (m *Manager) DefaultPool(ctx context.Context) string {
+	c, cancel := context.WithTimeout(ctx, 10*time.Second)
+	defer cancel()
+	out, err := m.run(c, "query", "/1.0/profiles/default")
+	if err != nil {
+		return ""
+	}
+	var p struct {
+		Devices map[string]map[string]string `json:"devices"`
+	}
+	if json.Unmarshal(out, &p) != nil {
+		return ""
+	}
+	return p.Devices["root"]["pool"]
+}
+
 func (m *Manager) Networks(ctx context.Context) []Network {
 	c, cancel := context.WithTimeout(ctx, 20*time.Second)
 	defer cancel()
@@ -800,8 +857,13 @@ type LibraryFile struct {
 	Name       string    `json:"name"`
 	Size       int64     `json:"size"`
 	Modified   time.Time `json:"modified"`
+	AttachedTo []string  `json:"attached_to,omitempty"`
 }

+// Installed reports whether the incus binary is on this machine at all; the cheap gate the
+// sensors use before asking it anything.
+func Installed() bool { return have("incus") }
+
 func (m *Manager) Library(dir string) []LibraryFile {
 	ents, err := os.ReadDir(dir)
 	if err != nil {
@@ -829,9 +891,13 @@ var (
 	snapRe   = regexp.MustCompile(`^[a-zA-Z0-9][a-zA-Z0-9._-]{0,62}$`)
 	cronRe   = regexp.MustCompile(`^(@(hourly|daily|weekly|monthly|yearly|annually|startup|never)|[0-9*/,-]+( [0-9*/,-]+){4})$`)
 	expRe    = regexp.MustCompile(`^[0-9]+[mHdwMy]( [0-9]+[mHdwMy])*$|^$`)
+	deviceRe = regexp.MustCompile(`^[a-zA-Z][a-zA-Z0-9_-]{0,30}$`)
+	isoRe    = regexp.MustCompile(`^[A-Za-z0-9][A-Za-z0-9._ +-]{0,200}\.(?i:iso|img)$`)
 )

 func ValidName(s string) bool    { return nameRe.MatchString(s) }
+func ValidDevice(s string) bool  { return deviceRe.MatchString(s) }
+func ValidISOName(s string) bool { return isoRe.MatchString(s) && s == filepath.Base(s) }
 func ValidImage(s string) bool   { return imageRe.MatchString(s) }
 func ValidSize(s string) bool    { return s == "" || sizeRe.MatchString(s) }
 func ValidCPU(s string) bool     { return s == "" || cpuRe.MatchString(s) }
@@ -848,6 +914,7 @@ type CreateSpec struct {
 	CPU         string   `json:"cpu"`
 	Memory      string   `json:"memory"`
 	Disk        string   `json:"disk"`
+	Pool        string   `json:"pool"` // where the root disk goes; blank is the default profile's
 	Network     string   `json:"network"`
 	CloudInit   string   `json:"cloud_init"`
 	Profiles    []string `json:"profiles"`
@@ -870,6 +937,8 @@ func CreateArgs(sp CreateSpec, kvm bool) ([]string, error) {
 		return nil, errors.New("memory: a size, like 2GiB")
 	case !ValidSize(sp.Disk):
 		return nil, errors.New("disk: a size, like 20GiB")
+	case sp.Pool != "" && !ValidName(sp.Pool):
+		return nil, errors.New("pool: a storage pool's name")
 	case !ValidNetwork(sp.Network):
 		return nil, errors.New("network: a bridge name")
 	case len(sp.CloudInit) > 256<<10:
@@ -891,8 +960,16 @@ func CreateArgs(sp CreateSpec, kvm bool) ([]string, error) {
 	if sp.Memory != "" {
 		args = append(args, "-c", "limits.memory="+sp.Memory)
 	}
+	// the root disk: the profile's, with the pool and size overridden where given
+	var root []string
+	if sp.Pool != "" {
+		root = append(root, "pool="+sp.Pool)
+	}
 	if sp.Disk != "" {
-		args = append(args, "-d", "root,size="+sp.Disk)
+		root = append(root, "size="+sp.Disk)
+	}
+	if len(root) > 0 {
+		args = append(args, "-d", "root,"+strings.Join(root, ","))
 	}
 	if sp.Network != "" {
 		args = append(args, "-n", sp.Network)
@@ -1075,3 +1152,61 @@ func (m *Manager) InstallScript(st Status, o InstallOpts) (string, Layout, error
 	w("if systemctl is-active --quiet %s; then systemd-run --quiet --on-active=3 --unit=hamlab-virt-restart systemctl restart %s; fi", HamlabUnit, HamlabUnit)
 	return b.String(), lay, nil
 }
+
+// FromISOSpec is the New VM from ISO form: an empty VM with the ISO as its first boot device.
+type FromISOSpec struct {
+	Name       string `json:"name"`
+	ISO        string `json:"iso"` // a file name in virt/isos
+	CPU        string `json:"cpu"`
+	Memory     string `json:"memory"`
+	Disk       string `json:"disk"`
+	Pool       string `json:"pool"`
+	Network    string `json:"network"`
+	SecureBoot bool   `json:"secureboot"`
+	Start      bool   `json:"start"`
+}
+
+// FromISOScript makes the VM in one shell script run through ShellCmd; the parameters carry
+// the values so nothing is spliced into the text.
+func FromISOScript(sp FromISOSpec, kvm bool) (script string, params []string, err error) {
+	switch {
+	case !kvm:
+		return "", nil, errors.New("this machine has no KVM")
+	case !ValidName(sp.Name):
+		return "", nil, errors.New("name: letters, digits and dashes, starting with a letter, up to 63")
+	case !ValidISOName(sp.ISO):
+		return "", nil, errors.New("iso: pick one from the library")
+	case !ValidCPU(sp.CPU) || !ValidSize(sp.Memory) || !ValidSize(sp.Disk) || !ValidNetwork(sp.Network):
+		return "", nil, errors.New("cpu, memory, disk: a count and two sizes, like 2, 2GiB, 20GiB")
+	case sp.Pool != "" && !ValidName(sp.Pool):
+		return "", nil, errors.New("pool: a storage pool's name")
+	}
+	cpu, mem, disk := sp.CPU, sp.Memory, sp.Disk
+	if cpu == "" {
+		cpu = "2"
+	}
+	if mem == "" {
+		mem = "2GiB"
+	}
+	if disk == "" {
+		disk = "20GiB"
+	}
+	sb := "true"
+	if !sp.SecureBoot {
+		sb = "false"
+	}
+	start := "0"
+	if sp.Start {
+		start = "1"
+	}
+	// $1 name $2 iso path $3 cpu $4 memory $5 disk $6 network $7 secureboot $8 start $9 pool
+	script = `set -e
+NET=""; [ -n "$6" ] && NET="-n $6"
+ROOT="root,size=$5"; [ -n "$9" ] && ROOT="root,pool=$9,size=$5"
+incus init --empty --vm "$1" -c limits.cpu="$3" -c limits.memory="$4" -c security.secureboot="$7" -d "$ROOT" $NET
+incus config device add "$1" iso0 disk source="$2" boot.priority=10
+echo "made $1 with $2 as its first boot device"
+[ "$8" = 1 ] && incus start "$1" && echo "started; open the VGA console to run the installer"
+exit 0`
+	return script, []string{sp.Name, sp.ISO, cpu, mem, disk, sp.Network, sb, start, sp.Pool}, nil
+}
@@ -21,13 +21,13 @@ func TestInstallScriptShapes(t *testing.T) {
 	}{
 		{"grid: zfs, apt, docker", Status{State: "installable", PM: "apt", Arch: "x86_64", Drivers: []string{"zfs", "btrfs", "dir"}, Docker: true, ZFSHost: true, DiskFree: 700 << 30, MemTotal: 62 << 30},
 			InstallOpts{Driver: "zfs", PoolSizeGiB: 300, Subnet: "172.16.100.1/24", DockerRules: true, ARCMaxGiB: 16},
-			[]string{"apt-get", "zpool create", "incus storage create default zfs source=hamlab-virt", "ipv4.address='172.16.100.1/24'", "DOCKER-USER", "zfs_arc_max", "usermod -aG incus-admin 'core'", "SupplementaryGroups=incus-admin", "systemd-run"}},
+			[]string{"apt-get", "zpool create", "incus storage create local zfs source=hamlab-virt", "ipv4.address='172.16.100.1/24'", "DOCKER-USER", "zfs_arc_max", "usermod -aG incus-admin 'core'", "SupplementaryGroups=incus-admin", "systemd-run"}},
 		{"core: btrfs, apt, docker, no tools yet", Status{State: "installable", PM: "apt", Arch: "x86_64", Drivers: []string{"btrfs", "dir"}, Docker: true, DiskFree: 170 << 30, MemTotal: 8 << 30},
 			InstallOpts{Driver: "btrfs", PoolSizeGiB: 40, Subnet: "172.16.100.1/24", DockerRules: true},
-			[]string{"btrfs-progs", "mkfs.btrfs", "/etc/fstab", "incus storage create default btrfs source="}},
+			[]string{"btrfs-progs", "mkfs.btrfs", "/etc/fstab", "incus storage create local btrfs source="}},
 		{"mac: dir, dnf, arm64", Status{State: "installable", PM: "dnf", Arch: "aarch64", Drivers: []string{"dir"}, DiskFree: 200 << 30, MemTotal: 15 << 30},
 			InstallOpts{Driver: "dir", Subnet: "172.16.101.1/24"},
-			[]string{"dnf -y install incus qemu-system-aarch64-core edk2-aarch64", "incus storage create default dir source="}},
+			[]string{"dnf -y install incus qemu-system-aarch64-core edk2-aarch64", "incus storage create local dir source="}},
 		{"repair: already installed", Status{State: "repair", PM: "apt", Arch: "x86_64", Drivers: []string{"dir"}, DiskFree: 10 << 30, MemTotal: 4 << 30},
 			InstallOpts{Driver: "dir", Subnet: "172.16.100.1/24"},
 			[]string{"already installed"}},
@@ -75,6 +75,9 @@ func TestCreateArgs(t *testing.T) {
 		t.Fatal(err)
 	}
 	want := "launch images:debian/13 web-1 --vm -c limits.cpu=2 -c limits.memory=2GiB -d root,size=20GiB -n incusbr0"
+	if a, err := CreateArgs(CreateSpec{Name: "x", Image: "images:alpine/3.22", Pool: "local"}, true); err != nil || strings.Join(a, " ") != "init images:alpine/3.22 x -d root,pool=local" {
+		t.Fatalf("pool override: %v %v", a, err)
+	}
 	if got := strings.Join(args, " "); got != want {
 		t.Fatalf("got %q", got)
 	}
@@ -14,7 +14,6 @@ import (
 	"net/netip"
 	"os"
 	"os/exec"
-	"strings"
 	"time"
 )

@@ -125,6 +124,3 @@ func dockerPools() []string {
 	}
 	return []string{"172.17.0.0/12", "192.168.0.0/16"}
 }
-
-// String form used in the layout file and on the page.
-func prefixString(p netip.Prefix) string { return strings.TrimSpace(p.Masked().String()) }
@@ -0,0 +1,192 @@
+package incus
+
+// The graphical console. Incus exposes a VM's SPICE display as a websocket: POST to the
+// instance's console endpoint with type vga and it answers an operation with two secrets,
+// one for the display stream and one for a control channel. Ham Lab dials both over Incus's
+// unix socket and hands the display stream to the browser, where spice-html5 draws it.
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"net"
+	"net/http"
+	"os"
+	"strings"
+	"time"
+
+	"github.com/coder/websocket"
+)
+
+// SocketPath is where Incus's API listens; the daemon's account reaches it by being in
+// incus-admin, which Install arranges.
+func SocketPath() string {
+	if p := os.Getenv("INCUS_SOCKET"); p != "" {
+		return p
+	}
+	for _, p := range []string{"/var/lib/incus/unix.socket", "/run/incus/unix.socket"} {
+		if _, err := os.Stat(p); err == nil {
+			return p
+		}
+	}
+	return "/var/lib/incus/unix.socket"
+}
+
+func (m *Manager) apiClient() *http.Client {
+	sock := SocketPath()
+	return &http.Client{Transport: &http.Transport{
+		DialContext: func(ctx context.Context, _, _ string) (net.Conn, error) {
+			var d net.Dialer
+			return d.DialContext(ctx, "unix", sock)
+		},
+		ForceAttemptHTTP2: false,
+	}}
+}
+
+// A SPICE client opens one connection per channel — main, display, inputs, cursor, playback
+// — and spice-html5 does the same with websockets, all to one URL. Incus allows exactly one
+// console operation per VM at a time, but takes any number of data websockets on it. So a VGA
+// session is one operation, held for as long as any channel is open, and every browser
+// websocket becomes one more data websocket on it.
+type vgaSession struct {
+	op      string
+	secret  string
+	control *websocket.Conn
+	cancel  context.CancelFunc
+	refs    int
+}
+
+// VGAChannel returns a fresh data websocket on the VM's console operation, opening the
+// operation first when none is held. release must be called when the channel is done.
+func (m *Manager) VGAChannel(ctx context.Context, name string) (data *websocket.Conn, release func(), err error) {
+	if !ValidName(name) {
+		return nil, nil, errors.New("bad name")
+	}
+	client := m.apiClient()
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	if m.vga == nil {
+		m.vga = map[string]*vgaSession{}
+	}
+	dial := func(s *vgaSession) (*websocket.Conn, error) {
+		c, cancel := context.WithTimeout(ctx, 20*time.Second)
+		defer cancel()
+		u := fmt.Sprintf("ws://incus/1.0/operations/%s/websocket?secret=%s", s.op, s.secret)
+		ws, _, err := websocket.Dial(c, u, &websocket.DialOptions{HTTPClient: client, CompressionMode: websocket.CompressionDisabled})
+		return ws, err
+	}
+	s := m.vga[name]
+	if s != nil {
+		if ws, err := dial(s); err == nil {
+			s.refs++
+			ws.SetReadLimit(64 << 20)
+			return ws, m.releaser(name, s), nil
+		}
+		// the operation is gone (the VM restarted, or Incus did): start over
+		s.cancel()
+		delete(m.vga, name)
+	}
+	s, err = m.openVGA(ctx, client, name, false)
+	if err != nil && strings.Contains(err.Error(), "already connected") {
+		// a session a previous Ham Lab process held and never let go of; take it over
+		s, err = m.openVGA(ctx, client, name, true)
+	}
+	if err != nil {
+		return nil, nil, err
+	}
+	ws, err := dial(s)
+	if err != nil {
+		s.cancel()
+		return nil, nil, err
+	}
+	ws.SetReadLimit(64 << 20)
+	s.refs = 1
+	m.vga[name] = s
+	return ws, m.releaser(name, s), nil
+}
+
+func (m *Manager) releaser(name string, s *vgaSession) func() {
+	return func() {
+		m.mu.Lock()
+		defer m.mu.Unlock()
+		s.refs--
+		if s.refs <= 0 && m.vga[name] == s {
+			s.cancel()
+			delete(m.vga, name)
+		}
+	}
+}
+
+// openVGA asks Incus for the console operation and holds its control websocket, which is
+// what keeps the operation alive.
+func (m *Manager) openVGA(ctx context.Context, client *http.Client, name string, force bool) (*vgaSession, error) {
+	body, _ := json.Marshal(map[string]any{"type": "vga", "width": 0, "height": 0, "force": force})
+	c, cancel := context.WithTimeout(ctx, 20*time.Second)
+	defer cancel()
+	req, _ := http.NewRequestWithContext(c, "POST", "http://incus/1.0/instances/"+name+"/console", bytes.NewReader(body))
+	req.Header.Set("Content-Type", "application/json")
+	resp, err := client.Do(req)
+	if err != nil {
+		if isPermission(err) {
+			return nil, errors.New("this account can't reach Incus's socket; Finish setup on the Virtualization tab puts Ham Lab in incus-admin")
+		}
+		return nil, err
+	}
+	defer resp.Body.Close()
+	var op struct {
+		Error    string `json:"error"`
+		Metadata struct {
+			ID       string `json:"id"`
+			Metadata struct {
+				FDs map[string]string `json:"fds"`
+			} `json:"metadata"`
+		} `json:"metadata"`
+	}
+	if err := json.NewDecoder(resp.Body).Decode(&op); err != nil {
+		return nil, errors.New("unreadable answer from incus")
+	}
+	if op.Error != "" {
+		return nil, errors.New(op.Error)
+	}
+	secret, controlSecret := op.Metadata.Metadata.FDs["0"], op.Metadata.Metadata.FDs["control"]
+	if op.Metadata.ID == "" || secret == "" {
+		return nil, errors.New("incus gave no console; is the VM running?")
+	}
+	s := &vgaSession{op: op.Metadata.ID, secret: secret}
+	// the control websocket lives outside any one request: it is the session
+	sctx, scancel := context.WithCancel(context.Background())
+	s.cancel = scancel
+	if controlSecret != "" {
+		u := fmt.Sprintf("ws://incus/1.0/operations/%s/websocket?secret=%s", s.op, controlSecret)
+		control, _, err := websocket.Dial(sctx, u, &websocket.DialOptions{HTTPClient: client, CompressionMode: websocket.CompressionDisabled})
+		if err != nil {
+			scancel()
+			return nil, err
+		}
+		s.control = control
+		go func() { // drain it; when it ends, so has the operation
+			for {
+				if _, _, err := control.Read(sctx); err != nil {
+					break
+				}
+			}
+			control.Close(websocket.StatusNormalClosure, "")
+		}()
+		go func() { <-sctx.Done(); control.Close(websocket.StatusNormalClosure, "") }()
+	}
+	return s, nil
+}
+
+func isPermission(err error) bool {
+	var pe *os.PathError
+	if errors.As(err, &pe) {
+		return os.IsPermission(pe)
+	}
+	var oe *net.OpError
+	if errors.As(err, &oe) {
+		return os.IsPermission(oe.Err) || isPermission(oe.Err)
+	}
+	return false
+}
@@ -0,0 +1,218 @@
+package media
+
+import (
+	"crypto/sha256"
+	"encoding/binary"
+	"encoding/hex"
+	"encoding/json"
+	"errors"
+	"os"
+	"strconv"
+	"sync"
+	"time"
+
+	bolt "go.etcd.io/bbolt"
+)
+
+// Cache keeps finished previews in one database file under Ham Lab's own data directory —
+// thumbs.db, a bbolt key/value store: pure Go, so the binary stays static, and one file
+// per machine rather than a tree of hash-named JPEGs. An entry is one file's preview keyed
+// by its path, size and mtime, so a file that changes gets a new preview and an unchanged
+// one is never decoded twice. A file ffmpeg could not decode is kept the same way, with
+// ffmpeg's reason and no picture, so a folder of odd files does not re-run ffmpeg on every
+// visit. Nothing expires: a preview is a few kilobytes, and only files somebody actually
+// scrolled past are ever made. The file is opened the first time something is stored, so a
+// machine nobody browses with previews on never has one.
+type Cache struct {
+	Path string
+	mu   sync.Mutex
+	db   *bolt.DB
+	err  error
+}
+
+// Entry is one cached preview, or the remembered reason there is none.
+type Entry struct {
+	Path    string    `json:"path"`
+	Engine  string    `json:"engine,omitempty"`
+	Codec   string    `json:"codec,omitempty"`
+	Width   int       `json:"width,omitempty"`
+	Height  int       `json:"height,omitempty"`
+	Made    time.Time `json:"made"`
+	Failure string    `json:"failure,omitempty"` // set instead of JPEG when ffmpeg refused the file
+	JPEG    []byte    `json:"-"`
+}
+
+var (
+	bucketThumbs = []byte("thumbs")
+	bucketMeta   = []byte("meta")
+	keyCount     = []byte("count")
+)
+
+// Key identifies one file's preview. "v1" is the preview format: bump it to retire every
+// cached preview at once.
+func Key(path string, size, mtime int64) string {
+	h := sha256.Sum256([]byte("v1\x00" + path + "\x00" + strconv.FormatInt(size, 10) + "\x00" + strconv.FormatInt(mtime, 10)))
+	return hex.EncodeToString(h[:])
+}
+
+func NewCache(path string) *Cache { return &Cache{Path: path} }
+
+// open the database once; an open that failed is not retried, and previews still get made
+// and served — they are simply not kept, and the log says why.
+func (c *Cache) open() (*bolt.DB, error) {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.db != nil || c.err != nil {
+		return c.db, c.err
+	}
+	db, err := bolt.Open(c.Path, 0o600, &bolt.Options{Timeout: 2 * time.Second})
+	if err != nil {
+		c.err = err
+		return nil, err
+	}
+	if err := db.Update(func(tx *bolt.Tx) error {
+		if _, err := tx.CreateBucketIfNotExists(bucketThumbs); err != nil {
+			return err
+		}
+		_, err := tx.CreateBucketIfNotExists(bucketMeta)
+		return err
+	}); err != nil {
+		db.Close()
+		c.err = err
+		return nil, err
+	}
+	c.db = db
+	return db, nil
+}
+
+// Close releases the file. Previews after it are made but not kept.
+func (c *Cache) Close() error {
+	c.mu.Lock()
+	defer c.mu.Unlock()
+	if c.db == nil {
+		return nil
+	}
+	err := c.db.Close()
+	c.db, c.err = nil, errors.New("cache closed")
+	return err
+}
+
+// Get returns the entry for a key. A database that does not exist yet is a miss, not a reason
+// to make one.
+func (c *Cache) Get(key string) (Entry, bool, error) {
+	c.mu.Lock()
+	db := c.db
+	c.mu.Unlock()
+	if db == nil {
+		if _, err := os.Stat(c.Path); err != nil {
+			return Entry{}, false, nil
+		}
+		var err error
+		if db, err = c.open(); err != nil {
+			return Entry{}, false, err
+		}
+	}
+	var e Entry
+	found := false
+	err := db.View(func(tx *bolt.Tx) error {
+		v := tx.Bucket(bucketThumbs).Get([]byte(key))
+		if v == nil {
+			return nil
+		}
+		var err error
+		e, err = decode(v) // copies: a value is only valid inside the transaction
+		found = err == nil
+		return err
+	})
+	return e, found, err
+}
+
+// Put stores an entry, replacing any under the same key.
+func (c *Cache) Put(key string, e Entry) error {
+	if len(e.JPEG) == 0 && e.Failure == "" {
+		return errors.New("empty preview")
+	}
+	if e.Made.IsZero() {
+		e.Made = time.Now()
+	}
+	db, err := c.open()
+	if err != nil {
+		return err
+	}
+	v, err := encode(e)
+	if err != nil {
+		return err
+	}
+	return db.Update(func(tx *bolt.Tx) error {
+		b := tx.Bucket(bucketThumbs)
+		k := []byte(key)
+		fresh := b.Get(k) == nil
+		if err := b.Put(k, v); err != nil {
+			return err
+		}
+		if fresh {
+			m := tx.Bucket(bucketMeta)
+			return m.Put(keyCount, be64(count(m)+1))
+		}
+		return nil
+	})
+}
+
+// Stats is how many previews are kept and how big the file is.
+func (c *Cache) Stats() (entries int64, bytes int64) {
+	st, err := os.Stat(c.Path)
+	if err != nil {
+		return 0, 0
+	}
+	bytes = st.Size()
+	db, err := c.open()
+	if err != nil {
+		return 0, bytes
+	}
+	_ = db.View(func(tx *bolt.Tx) error { entries = count(tx.Bucket(bucketMeta)); return nil })
+	return entries, bytes
+}
+
+func count(m *bolt.Bucket) int64 {
+	if v := m.Get(keyCount); len(v) == 8 {
+		return int64(binary.BigEndian.Uint64(v))
+	}
+	return 0
+}
+
+func be64(n int64) []byte {
+	b := make([]byte, 8)
+	binary.BigEndian.PutUint64(b, uint64(n))
+	return b
+}
+
+// A value is a 4-byte header length, the header as JSON, then the JPEG bytes.
+func encode(e Entry) ([]byte, error) {
+	hdr, err := json.Marshal(e)
+	if err != nil {
+		return nil, err
+	}
+	v := make([]byte, 4+len(hdr)+len(e.JPEG))
+	binary.BigEndian.PutUint32(v, uint32(len(hdr)))
+	copy(v[4:], hdr)
+	copy(v[4+len(hdr):], e.JPEG)
+	return v, nil
+}
+
+func decode(v []byte) (Entry, error) {
+	if len(v) < 4 {
+		return Entry{}, errors.New("short value")
+	}
+	n := int(binary.BigEndian.Uint32(v))
+	if 4+n > len(v) {
+		return Entry{}, errors.New("bad header length")
+	}
+	var e Entry
+	if err := json.Unmarshal(v[4:4+n], &e); err != nil {
+		return Entry{}, err
+	}
+	if rest := v[4+n:]; len(rest) > 0 {
+		e.JPEG = append([]byte(nil), rest...)
+	}
+	return e, nil
+}
@@ -0,0 +1,222 @@
+package media
+
+// What to run when a file is to be re-encoded for a browser that cannot play it as it is:
+// the codecs and sizes on offer, the output size and bit rate a choice comes to for a
+// given source, the ways this machine could do it in the order worth trying, and the
+// ffmpeg argument list for one of them. All decisions, no processes, so it can be tested.
+
+import (
+	"fmt"
+	"math"
+	"sort"
+	"strconv"
+)
+
+// Codec is one target a stream may be re-encoded to. "copy" keeps the codec and only
+// repackages: for a browser that lacks the container, not the decoder.
+type Codec struct {
+	ID    string `json:"id"`
+	Label string `json:"label"`
+}
+
+var Codecs = []Codec{{"h264", "H.264"}, {"hevc", "HEVC"}, {"av1", "AV1"}, {"copy", "Original codec, repackaged"}}
+
+// Quality is a picture height; the bit rate follows from the size the output ends up at.
+type Quality struct {
+	ID     string `json:"id"`
+	Label  string `json:"label"`
+	Height int    `json:"height"` // 0: the source's own
+}
+
+var Qualities = []Quality{{"original", "Original size", 0}, {"1080p", "1080p", 1080}, {"720p", "720p", 720}, {"480p", "480p", 480}}
+
+func qualityByID(id string) (Quality, bool) {
+	for _, q := range Qualities {
+		if q.ID == id {
+			return q, true
+		}
+	}
+	return Quality{}, false
+}
+
+// ValidChoice says whether a codec and quality are ones on offer — checked before any work.
+func ValidChoice(codec, quality string) error {
+	if !codecKnown(codec) {
+		return fmt.Errorf("unknown codec %q", codec)
+	}
+	if _, ok := qualityByID(quality); !ok {
+		return fmt.Errorf("unknown quality %q", quality)
+	}
+	return nil
+}
+
+func codecKnown(id string) bool {
+	for _, c := range Codecs {
+		if c.ID == id {
+			return true
+		}
+	}
+	return false
+}
+
+// fit is the output: never larger than the source, even dimensions, and a bit rate by the
+// size it comes to — a quarter more at 50 fps and up, less for the codecs that need less.
+func fit(q Quality, src Info, codec string) (w, h, kbps int) {
+	w, h = src.Video.Width, src.Video.Height
+	if q.Height > 0 && h > q.Height {
+		w = int(math.Round(float64(w) * float64(q.Height) / float64(h)))
+		h = q.Height
+	}
+	w, h = w&^1, h&^1
+	switch {
+	case h >= 2160:
+		kbps = 20000
+	case h >= 1440:
+		kbps = 12000
+	case h >= 1080:
+		kbps = 8000
+	case h >= 720:
+		kbps = 4000
+	default:
+		kbps = 2000
+	}
+	if src.Video.FPS >= 50 {
+		kbps = kbps * 5 / 4
+	}
+	if codec == "hevc" || codec == "av1" {
+		kbps = kbps * 6 / 10
+	}
+	return w, h, kbps
+}
+
+// Recipe is one way to make the stream: the engine's name for the record, and the ffmpeg
+// arguments that go before the input, the video filter, and the video codec.
+type Recipe struct {
+	Engine string
+	Pre    []string
+	VF     string
+	Video  []string
+}
+
+// recipes are the ways to try, best first: a card on the bus before the integrated GPU;
+// on a GPU, decoding on the same card (frames never leave it) before decoding in software
+// and uploading; the software encoders last. An empty list means nothing here can.
+func recipes(c Caps, codec string, src Info, w, h, kbps int) []Recipe {
+	if codec == "copy" {
+		v := []string{"-c:v", "copy"}
+		if src.Video.Codec == "hevc" {
+			v = append(v, "-tag:v", "hvc1") // Safari reads hvc1, not hev1
+		}
+		return []Recipe{{Engine: "Original codec", Video: v}}
+	}
+	var out []Recipe
+	gpus := append([]GPU(nil), c.GPUs...)
+	sort.SliceStable(gpus, func(i, j int) bool { return !gpus[i].Integrated && gpus[j].Integrated })
+	rate := []string{"-b:v", strconv.Itoa(kbps) + "k", "-maxrate", strconv.Itoa(kbps*5/4) + "k", "-bufsize", strconv.Itoa(kbps*5/2) + "k"}
+	for i := range gpus {
+		g := &gpus[i]
+		if g.API != "vaapi" || !has(g.Encodes, codec) {
+			continue
+		}
+		video := append([]string{"-c:v", codec + "_vaapi"}, rate...)
+		switch codec {
+		case "h264":
+			video = append(video, "-profile:v", "high")
+		case "hevc":
+			video = append(video, "-tag:v", "hvc1")
+		}
+		name := g.Name
+		if name == "" {
+			name = g.Device
+		}
+		scale := fmt.Sprintf("scale_vaapi=w=%d:h=%d:format=nv12", w, h)
+		if has(g.Codecs, src.Video.Codec) {
+			vf := scale
+			if src.HDR() {
+				vf = "tonemap_vaapi=format=nv12:t=bt709:p=bt709:m=bt709," + vf
+			}
+			out = append(out, Recipe{Engine: name + " (vaapi)", Pre: []string{"-hwaccel", "vaapi", "-hwaccel_device", g.Device, "-hwaccel_output_format", "vaapi"}, VF: vf, Video: video})
+		}
+		out = append(out, Recipe{Engine: name + " (vaapi, decoded on the CPU)", Pre: []string{"-init_hw_device", "vaapi=va:" + g.Device, "-filter_hw_device", "va"},
+			VF: fmt.Sprintf("format=nv12,scale=%d:%d,hwupload", w, h), Video: video})
+	}
+	swVF := fmt.Sprintf("scale=%d:%d,format=yuv420p", w, h)
+	if src.HDR() {
+		swVF = fmt.Sprintf("zscale=t=linear:npl=100,format=gbrpf32le,zscale=p=bt709,tonemap=hable,zscale=t=bt709:m=bt709,scale=%d:%d,format=yuv420p", w, h)
+	}
+	cap := []string{"-maxrate", strconv.Itoa(kbps*5/4) + "k", "-bufsize", strconv.Itoa(kbps*5/2) + "k"}
+	switch {
+	case codec == "h264" && has(c.Encoders, "libx264"):
+		out = append(out, Recipe{Engine: "CPU (libx264)", VF: swVF, Video: append([]string{"-c:v", "libx264", "-preset", "veryfast", "-crf", "23", "-profile:v", "high"}, cap...)})
+	case codec == "hevc" && has(c.Encoders, "libx265"):
+		out = append(out, Recipe{Engine: "CPU (libx265)", VF: swVF, Video: append([]string{"-c:v", "libx265", "-preset", "fast", "-crf", "26", "-tag:v", "hvc1"}, cap...)})
+	case codec == "av1" && has(c.Encoders, "libsvtav1"):
+		out = append(out, Recipe{Engine: "CPU (SVT-AV1)", VF: swVF, Video: append([]string{"-c:v", "libsvtav1", "-preset", "8", "-crf", "35"}, cap...)})
+	}
+	return out
+}
+
+// EngineFor is the engine the picker will say a codec runs on, "" when none can.
+func EngineFor(c Caps, codec string) string {
+	if c.Error != "" {
+		return ""
+	}
+	if codec == "copy" {
+		return "Original codec"
+	}
+	r := recipes(c, codec, Info{Video: &Track{Codec: "h264", Width: 1920, Height: 1080}}, 1920, 1080, 8000)
+	if len(r) == 0 {
+		return ""
+	}
+	return r[0].Engine
+}
+
+// hlsArgs is the whole ffmpeg argument list for one recipe: the input, the first video and
+// audio streams, the picture through the recipe, sound as AAC unless it already is, a
+// keyframe every segment, and an event playlist of fragmented-MP4 segments in dir.
+func hlsArgs(dir, in string, src Info, r Recipe, copyCodec bool) []string {
+	a := []string{"-nostdin", "-hide_banner", "-loglevel", "error", "-y"}
+	a = append(a, r.Pre...)
+	a = append(a, "-i", in, "-map", "0:v:0", "-map", "0:a:0?", "-sn", "-dn")
+	if r.VF != "" {
+		a = append(a, "-vf", r.VF)
+	}
+	a = append(a, r.Video...)
+	switch {
+	case src.Audio == nil:
+		a = append(a, "-an")
+	case src.Audio.Codec == "aac":
+		a = append(a, "-c:a", "copy")
+	default:
+		a = append(a, "-c:a", "aac", "-b:a", "160k", "-ac", "2")
+	}
+	if !copyCodec {
+		fps := src.Video.FPS
+		if fps <= 0 {
+			fps = 30
+		}
+		gop := int(math.Round(fps * hlsSeconds))
+		if gop < 24 {
+			gop = 24
+		}
+		if gop > 300 {
+			gop = 300
+		}
+		a = append(a, "-g", strconv.Itoa(gop), "-force_key_frames", fmt.Sprintf("expr:gte(t,n_forced*%d)", hlsSeconds))
+	}
+	a = append(a, "-f", "hls", "-hls_time", strconv.Itoa(hlsSeconds), "-hls_playlist_type", "event", "-hls_segment_type", "fmp4",
+		"-hls_fmp4_init_filename", "init.mp4", "-hls_segment_filename", dir+"/seg%05d.m4s", "-hls_flags", "independent_segments+temp_file",
+		"-progress", dir+"/progress", "-stats_period", "1", dir+"/index.m3u8")
+	return a
+}
+
+const hlsSeconds = 4
+
+func has(list []string, x string) bool {
+	for _, v := range list {
+		if v == x {
+			return true
+		}
+	}
+	return false
+}
@@ -0,0 +1,128 @@
+package media
+
+import (
+	"strings"
+	"testing"
+)
+
+func src(codec string, w, h int, fps float64) Info {
+	return Info{Duration: 100, Video: &Track{Codec: codec, Width: w, Height: h, FPS: fps}, Audio: &Track{Codec: "opus", Channels: 2}}
+}
+
+func TestFit(t *testing.T) {
+	q := func(id string) Quality { x, _ := qualityByID(id); return x }
+	for _, c := range []struct {
+		q         string
+		in        Info
+		codec     string
+		w, h, kbs int
+	}{
+		{"1080p", src("hevc", 3840, 2160, 60), "h264", 1920, 1080, 10000},
+		{"original", src("hevc", 3840, 2160, 30), "h264", 3840, 2160, 20000},
+		{"720p", src("h264", 2292, 960, 60), "h264", 1718, 720, 5000},  // odd width made even
+		{"1080p", src("h264", 1280, 720, 30), "h264", 1280, 720, 4000}, // never upscaled
+		{"480p", src("h264", 1920, 1080, 30), "hevc", 852, 480, 1200},  // 853.3 rounds down, then even
+		{"original", src("av1", 640, 360, 24), "av1", 640, 360, 1200},
+	} {
+		w, h, k := fit(q(c.q), c.in, c.codec)
+		if w != c.w || h != c.h || k != c.kbs {
+			t.Errorf("%s %s %dx%d@%.0f → %dx%d %dk, want %dx%d %dk", c.q, c.codec, c.in.Video.Width, c.in.Video.Height, c.in.Video.FPS, w, h, k, c.w, c.h, c.kbs)
+		}
+	}
+}
+
+func gridCaps() Caps {
+	return Caps{FFmpeg: "ffmpeg", FFprobe: "ffprobe", Encoders: []string{"aac", "libsvtav1", "libx264", "libx265"},
+		GPUs: []GPU{
+			{API: "vaapi", Device: "/dev/dri/renderD128", Name: "Intel UHD Graphics 750", Integrated: true, Codecs: []string{"h264", "hevc", "vp9"}, Encodes: []string{"h264", "hevc"}},
+			{API: "vaapi", Device: "/dev/dri/renderD129", Name: "Intel Arc A380", Codecs: []string{"h264", "hevc", "vp9"}, Encodes: []string{"av1", "h264", "hevc"}},
+		}}
+}
+
+func engineNames(r []Recipe) []string {
+	out := make([]string, len(r))
+	for i := range r {
+		out[i] = r[i].Engine
+	}
+	return out
+}
+
+func TestRecipesOrder(t *testing.T) {
+	c := gridCaps()
+	// h264 from hevc: the card first, decoding on it; then the iGPU the same way; then the CPU
+	got := engineNames(recipes(c, "h264", src("hevc", 3840, 2160, 60), 1920, 1080, 10000))
+	want := []string{"Intel Arc A380 (vaapi)", "Intel Arc A380 (vaapi, decoded on the CPU)", "Intel UHD Graphics 750 (vaapi)", "Intel UHD Graphics 750 (vaapi, decoded on the CPU)", "CPU (libx264)"}
+	if strings.Join(got, "|") != strings.Join(want, "|") {
+		t.Fatalf("got %v", got)
+	}
+	// av1 source: neither card decodes it, so no same-card recipe, and only the Arc encodes av1
+	got = engineNames(recipes(c, "av1", src("av1", 1920, 1080, 30), 1920, 1080, 4800))
+	want = []string{"Intel Arc A380 (vaapi, decoded on the CPU)", "CPU (SVT-AV1)"}
+	if strings.Join(got, "|") != strings.Join(want, "|") {
+		t.Fatalf("av1: got %v", got)
+	}
+	// copy is one recipe, no filter, hvc1 for hevc
+	r := recipes(c, "copy", src("hevc", 1920, 1080, 30), 1920, 1080, 0)
+	if len(r) != 1 || r[0].VF != "" || !has(r[0].Video, "hvc1") || !has(r[0].Video, "copy") {
+		t.Fatalf("copy: %+v", r)
+	}
+	// a machine with no GPU and no x264: nothing for h264, something for av1
+	bare := Caps{FFmpeg: "ffmpeg", FFprobe: "ffprobe", Encoders: []string{"aac", "libsvtav1"}}
+	if len(recipes(bare, "h264", src("h264", 1280, 720, 30), 1280, 720, 4000)) != 0 {
+		t.Fatal("no x264 means no h264")
+	}
+	if EngineFor(bare, "av1") != "CPU (SVT-AV1)" || EngineFor(bare, "h264") != "" || EngineFor(bare, "copy") != "Original codec" {
+		t.Fatal("engineFor")
+	}
+	if EngineFor(c, "hevc") != "Intel Arc A380 (vaapi)" {
+		t.Fatalf("engineFor on grid: %q", EngineFor(c, "hevc"))
+	}
+	// HDR gets tone-mapped on both paths
+	hdr := src("hevc", 3840, 2160, 60)
+	hdr.Video.ColorTransfer = "smpte2084"
+	r = recipes(c, "h264", hdr, 1920, 1080, 10000)
+	if !strings.HasPrefix(r[0].VF, "tonemap_vaapi") || !strings.Contains(r[len(r)-1].VF, "tonemap=hable") {
+		t.Fatalf("hdr: %q … %q", r[0].VF, r[len(r)-1].VF)
+	}
+}
+
+func TestHLSArgs(t *testing.T) {
+	in := src("h264", 1920, 1080, 60)
+	r := recipes(gridCaps(), "h264", in, 1920, 1080, 10000)[0]
+	a := strings.Join(hlsArgs("/d", "/v.mkv", in, r, false), " ")
+	for _, want := range []string{"-hwaccel vaapi -hwaccel_device /dev/dri/renderD129", "-i /v.mkv", "-map 0:v:0 -map 0:a:0?", "-vf scale_vaapi=w=1920:h=1080:format=nv12", "-c:v h264_vaapi -b:v 10000k -maxrate 12500k", "-c:a aac -b:a 160k -ac 2", "-g 240 -force_key_frames expr:gte(t,n_forced*4)", "-hls_segment_type fmp4", "-hls_segment_filename /d/seg%05d.m4s", "/d/index.m3u8"} {
+		if !strings.Contains(a, want) {
+			t.Errorf("missing %q in\n%s", want, a)
+		}
+	}
+	// aac stays as it is; no audio means none; copy sets no keyframes
+	in.Audio.Codec = "aac"
+	if a := strings.Join(hlsArgs("/d", "/v", in, r, false), " "); !strings.Contains(a, "-c:a copy") {
+		t.Error("aac should be copied")
+	}
+	in.Audio = nil
+	if a := strings.Join(hlsArgs("/d", "/v", in, r, false), " "); !strings.Contains(a, " -an ") {
+		t.Error("no audio stream → -an")
+	}
+	cp := recipes(gridCaps(), "copy", in, 1920, 1080, 0)[0]
+	if a := strings.Join(hlsArgs("/d", "/v", in, cp, true), " "); strings.Contains(a, "force_key_frames") || strings.Contains(a, "-vf") {
+		t.Error("copy must not ask for keyframes or filter")
+	}
+}
+
+func TestParseProgress(t *testing.T) {
+	b := []byte("frame=10\nout_time_us=1000000\nspeed=2.5x\nprogress=continue\nframe=20\nout_time_us=2500000\nspeed=3.1x\nprogress=continue\n")
+	s, sp := parseProgress(b)
+	if s != 2.5 || sp != 3.1 {
+		t.Fatalf("got %v %v", s, sp)
+	}
+}
+
+func TestValidChoice(t *testing.T) {
+	if err := ValidChoice("h264", "720p"); err != nil {
+		t.Fatal(err)
+	}
+	if ValidChoice("vp8", "720p") == nil || ValidChoice("h264", "9p") == nil || ValidChoice("", "") == nil {
+		t.Fatal("bad choices must be refused")
+	}
+}
@@ -0,0 +1,188 @@
+package media
+
+// Running one long ffmpeg: as the daemon's user directly, or as root through this binary's
+// run-ffmpeg helper when the file needs root to read. The helper is told to finish by its
+// standard input closing, which also happens by itself if the daemon goes away — so a
+// transcode never outlives the console that asked for it.
+
+import (
+	"bytes"
+	"context"
+	"errors"
+	"io"
+	"os"
+	"os/exec"
+	"strings"
+	"sync"
+	"syscall"
+	"time"
+
+	"hamlab/internal/priv"
+)
+
+type ffproc struct {
+	cmd  *exec.Cmd
+	in   io.WriteCloser // the helper's stdin, root mode only
+	done chan struct{}
+	err  error
+	tail *tailBuf
+}
+
+// startFF launches ffmpeg with args, under nice where there is one.
+func startFF(c Caps, self string, root bool, args []string) (*ffproc, error) {
+	var argv []string
+	if root {
+		argv = priv.Wrap(append([]string{self, "run-ffmpeg"}, args...)...)
+	} else {
+		argv = append([]string{c.FFmpeg}, args...)
+		if c.Nice != "" {
+			argv = append([]string{c.Nice, "-n", "10"}, argv...)
+		}
+	}
+	cmd := exec.Command(argv[0], argv[1:]...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+	p := &ffproc{cmd: cmd, done: make(chan struct{}), tail: &tailBuf{}}
+	cmd.Stderr = p.tail
+	cmd.Stdout = io.Discard
+	if root {
+		in, err := cmd.StdinPipe()
+		if err != nil {
+			return nil, err
+		}
+		p.in = in
+	}
+	if err := cmd.Start(); err != nil {
+		return nil, err
+	}
+	go func() {
+		p.err = cmd.Wait()
+		close(p.done)
+	}()
+	return p, nil
+}
+
+// exited reports whether ffmpeg has finished, and how.
+func (p *ffproc) exited() (bool, error) {
+	select {
+	case <-p.done:
+		return true, p.err
+	default:
+		return false, nil
+	}
+}
+
+// end asks ffmpeg to finish and waits a little for it.
+func (p *ffproc) end() {
+	if done, _ := p.exited(); done {
+		return
+	}
+	if p.in != nil {
+		p.in.Close()
+	} else {
+		_ = syscall.Kill(-p.cmd.Process.Pid, syscall.SIGTERM)
+	}
+	select {
+	case <-p.done:
+	case <-time.After(5 * time.Second):
+		_ = syscall.Kill(-p.cmd.Process.Pid, syscall.SIGKILL) // a root helper ignores this; it ends on its own within its own grace
+		select {
+		case <-p.done:
+		case <-time.After(10 * time.Second):
+		}
+	}
+}
+
+// lastWords is what ffmpeg said last, for the record.
+func (p *ffproc) lastWords() string { return p.tail.last() }
+
+// tailBuf keeps the last few KB written to it.
+type tailBuf struct {
+	mu sync.Mutex
+	b  []byte
+}
+
+const tailKeep = 4096
+
+func (t *tailBuf) Write(b []byte) (int, error) {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	t.b = append(t.b, b...)
+	if len(t.b) > tailKeep {
+		t.b = t.b[len(t.b)-tailKeep:]
+	}
+	return len(b), nil
+}
+
+func (t *tailBuf) last() string {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return lastLine(string(bytes.TrimSpace(t.b)))
+}
+
+// RunFFmpegHelper implements `hamlab run-ffmpeg <args…>`: ffmpeg as this user (root, when
+// the daemon asked through sudo), finishing when stdin closes. Returns ffmpeg's exit code.
+func RunFFmpegHelper(args []string, stdin io.Reader, stderr io.Writer) int {
+	ffmpeg, err := exec.LookPath("ffmpeg")
+	if err != nil {
+		io.WriteString(stderr, "ffmpeg is not installed\n")
+		return 1
+	}
+	argv := []string{ffmpeg}
+	if nice, err := exec.LookPath("nice"); err == nil {
+		argv = []string{nice, "-n", "10", ffmpeg}
+	}
+	cmd := exec.Command(argv[0], append(argv[1:], args...)...)
+	cmd.SysProcAttr = &syscall.SysProcAttr{Setpgid: true}
+	cmd.Stderr = stderr
+	cmd.Stdout = io.Discard
+	if err := cmd.Start(); err != nil {
+		io.WriteString(stderr, err.Error()+"\n")
+		return 1
+	}
+	ctx, cancel := context.WithCancel(context.Background())
+	go func() {
+		_, _ = io.Copy(io.Discard, stdin) // returns when the daemon lets go
+		cancel()
+	}()
+	done := make(chan error, 1)
+	go func() { done <- cmd.Wait() }()
+	var werr error
+	select {
+	case werr = <-done:
+	case <-ctx.Done():
+		_ = syscall.Kill(-cmd.Process.Pid, syscall.SIGTERM)
+		select {
+		case werr = <-done:
+		case <-time.After(5 * time.Second):
+			_ = syscall.Kill(-cmd.Process.Pid, syscall.SIGKILL)
+			werr = <-done
+		}
+	}
+	var ee *exec.ExitError
+	if errors.As(werr, &ee) {
+		return ee.ExitCode()
+	}
+	if werr != nil {
+		return 1
+	}
+	return 0
+}
+
+// clearDir empties a folder without removing it.
+func clearDir(dir string) error {
+	ents, err := os.ReadDir(dir)
+	if err != nil {
+		return err
+	}
+	for _, e := range ents {
+		if err := os.RemoveAll(dir + "/" + e.Name()); err != nil {
+			return err
+		}
+	}
+	return nil
+}
+
+func hasSegments(playlist string) bool {
+	b, err := os.ReadFile(playlist)
+	return err == nil && strings.Contains(string(b), "#EXTINF")
+}
@@ -0,0 +1,344 @@
+package media
+
+// Playing what the browser cannot play as it is: an HLS stream, re-encoded on demand by
+// ffmpeg on the machine's own GPU where it has one it can use, on its CPU otherwise. A
+// stream is one file at one codec and size, in a folder of its own under
+// <data dir>/transcode/: ffmpeg writes an event playlist and fragmented-MP4 segments there
+// as fast as it can, and the player reads them as they land, so the range it can seek in
+// grows until the whole file is through — on a GPU, several times faster than watching.
+// Nothing is kept: a stream nobody has touched for a while is ended and its folder
+// removed, and the folder is emptied when the daemon starts.
+
+import (
+	"bufio"
+	"context"
+	"crypto/rand"
+	"encoding/hex"
+	"errors"
+	"fmt"
+	"log"
+	"os"
+	"path/filepath"
+	"regexp"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+)
+
+// Stream is one re-encode, in progress or finished.
+type Stream struct {
+	ID      string    `json:"id"`
+	Path    string    `json:"path"`
+	Codec   string    `json:"codec"`
+	Quality string    `json:"quality"`
+	Engine  string    `json:"engine"`
+	Width   int       `json:"width"`
+	Height  int       `json:"height"`
+	Kbps    int       `json:"kbps"`
+	Source  Info      `json:"source"`
+	Started time.Time `json:"started"`
+	Root    bool      `json:"root"`
+
+	key      string
+	dir      string
+	mu       sync.Mutex
+	used     time.Time
+	proc     *ffproc
+	finished bool
+	failure  string
+	gone     bool // forgotten by the Streamer
+}
+
+// StreamStatus is what the player asks for while the file is still going through.
+type StreamStatus struct {
+	Running  bool    `json:"running"`
+	Done     bool    `json:"done"`
+	Error    string  `json:"error,omitempty"`
+	Progress float64 `json:"progress"` // seconds of output written
+	Speed    float64 `json:"speed"`    // × realtime
+	Segments int     `json:"segments"`
+}
+
+// Streamer keeps one machine's streams.
+type Streamer struct {
+	dir     string
+	self    string
+	limit   int
+	mu      sync.Mutex
+	streams map[string]*Stream
+}
+
+const streamIdle = 10 * time.Minute
+const firstSegmentWait = 40 * time.Second
+
+var streamFile = regexp.MustCompile(`^(index\.m3u8|init\.mp4|seg\d{5}\.m4s)$`)
+
+// NewStreamer empties the folder — a daemon restart orphans every stream — and starts the
+// sweeper.
+func NewStreamer(dataDir, self string, limit int) *Streamer {
+	m := &Streamer{dir: filepath.Join(dataDir, "transcode"), self: self, limit: limit, streams: map[string]*Stream{}}
+	_ = os.MkdirAll(m.dir, 0o755)
+	_ = clearDir(m.dir)
+	go func() {
+		for range time.Tick(30 * time.Second) {
+			m.Sweep(streamIdle)
+		}
+	}()
+	return m
+}
+
+// Open starts a stream, or hands back the one already serving the same request. It
+// returns once the first segment is on disk, so the player's first fetch is answered.
+func (m *Streamer) Open(ctx context.Context, c Caps, root bool, path, codec, quality string, src Info) (*Stream, error) {
+	if c.Error != "" {
+		return nil, errors.New(c.Error)
+	}
+	if err := ValidChoice(codec, quality); err != nil {
+		return nil, err
+	}
+	q, _ := qualityByID(quality)
+	if src.Video == nil {
+		return nil, &DecodeError{Msg: "no video stream"}
+	}
+	if src.Video.Width <= 0 || src.Video.Height <= 0 {
+		return nil, &DecodeError{Msg: "the picture's size is unknown"}
+	}
+	key := fmt.Sprintf("%s|%d|%.0f|%s|%s|%v", path, src.Size, src.Duration, codec, quality, root)
+	m.mu.Lock()
+	for _, s := range m.streams {
+		if s.key == key {
+			if s.failed() { // not the stream to hand back: let it go and make a fresh one
+				delete(m.streams, s.ID)
+				_ = os.RemoveAll(s.dir)
+				break
+			}
+			m.mu.Unlock()
+			s.touch()
+			return s, nil
+		}
+	}
+	running := 0
+	for _, s := range m.streams {
+		if s.running() {
+			running++
+		}
+	}
+	if running >= m.limit {
+		m.mu.Unlock()
+		return nil, fmt.Errorf("%d videos are already being re-encoded on this machine; one must finish or be closed first", running)
+	}
+	s := &Stream{ID: newID(), Path: path, Codec: codec, Quality: quality, Source: src, Started: time.Now(), Root: root, key: key, used: time.Now()}
+	s.dir = filepath.Join(m.dir, s.ID)
+	m.streams[s.ID] = s
+	m.mu.Unlock()
+
+	s.Width, s.Height, s.Kbps = fit(q, src, codec)
+	if codec == "copy" {
+		s.Width, s.Height, s.Kbps = src.Video.Width, src.Video.Height, int(src.BitRate/1000)
+	}
+	rs := recipes(c, codec, src, s.Width, s.Height, s.Kbps)
+	if len(rs) == 0 {
+		m.forget(s)
+		return nil, errors.New("nothing on this machine encodes " + codec)
+	}
+	var last string
+	for _, r := range rs {
+		if err := os.MkdirAll(s.dir, 0o755); err != nil { // the root helper's ffmpeg writes here too
+			m.forget(s)
+			return nil, err
+		}
+		_ = clearDir(s.dir)
+		args := hlsArgs(s.dir, path, src, r, codec == "copy")
+		p, err := startFF(c, m.self, root, args)
+		if err != nil {
+			last = r.Engine + ": " + err.Error()
+			continue
+		}
+		s.mu.Lock()
+		s.proc, s.Engine = p, r.Engine
+		s.mu.Unlock()
+		msg, ok := s.waitFirstSegment(ctx)
+		if ok {
+			go s.watch()
+			log.Printf("media: stream %s: %s → %s %s %dx%d %dk on %s", s.ID, filepath.Base(path), codec, quality, s.Width, s.Height, s.Kbps, r.Engine)
+			return s, nil
+		}
+		p.end()
+		if ctx.Err() != nil || s.closed() { // the caller left, or somebody closed it meanwhile: not the recipe's fault
+			m.forget(s)
+			return nil, errors.New("cancelled")
+		}
+		last = r.Engine + ": " + msg
+		log.Printf("media: stream %s on %s: %s", filepath.Base(path), r.Engine, msg)
+	}
+	m.forget(s)
+	return nil, &DecodeError{Msg: last}
+}
+
+// waitFirstSegment watches for the playlist's first segment, or ffmpeg giving up.
+func (s *Stream) waitFirstSegment(ctx context.Context) (string, bool) {
+	deadline := time.Now().Add(firstSegmentWait)
+	playlist := filepath.Join(s.dir, "index.m3u8")
+	for {
+		if hasSegments(playlist) {
+			return "", true
+		}
+		if done, err := s.proc.exited(); done {
+			msg := s.proc.lastWords()
+			if msg == "" && err != nil {
+				msg = err.Error()
+			}
+			if msg == "" {
+				msg = "ffmpeg ended before writing a segment"
+			}
+			return msg, false
+		}
+		if time.Now().After(deadline) {
+			return "no segment after " + firstSegmentWait.String(), false
+		}
+		select {
+		case <-ctx.Done():
+			return ctx.Err().Error(), false
+		case <-time.After(250 * time.Millisecond):
+		}
+	}
+}
+
+// watch records how the encode ended.
+func (s *Stream) watch() {
+	<-s.proc.done
+	s.mu.Lock()
+	s.finished = true
+	if s.proc.err != nil {
+		s.failure = s.proc.lastWords()
+		if s.failure == "" {
+			s.failure = s.proc.err.Error()
+		}
+	}
+	s.mu.Unlock()
+	if s.failure != "" {
+		log.Printf("media: stream %s ended early: %s", s.ID, s.failure)
+	}
+}
+
+func (m *Streamer) Find(id string) (*Stream, bool) {
+	m.mu.Lock()
+	defer m.mu.Unlock()
+	s, ok := m.streams[id]
+	return s, ok
+}
+
+// Close ends a stream and removes its folder.
+func (m *Streamer) Close(id string) {
+	m.mu.Lock()
+	s, ok := m.streams[id]
+	m.mu.Unlock()
+	if !ok {
+		return
+	}
+	s.mu.Lock()
+	p := s.proc
+	s.mu.Unlock()
+	if p != nil {
+		p.end()
+	}
+	m.forget(s)
+}
+
+func (m *Streamer) forget(s *Stream) {
+	m.mu.Lock()
+	delete(m.streams, s.ID)
+	m.mu.Unlock()
+	s.mu.Lock()
+	s.gone = true
+	s.mu.Unlock()
+	_ = os.RemoveAll(s.dir)
+}
+
+func (s *Stream) closed() bool { s.mu.Lock(); defer s.mu.Unlock(); return s.gone }
+
+func (s *Stream) failed() bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.finished && s.failure != ""
+}
+
+// Sweep closes what nobody has touched for a while.
+func (m *Streamer) Sweep(idle time.Duration) {
+	m.mu.Lock()
+	var old []string
+	for id, s := range m.streams {
+		s.mu.Lock()
+		if time.Since(s.used) > idle {
+			old = append(old, id)
+		}
+		s.mu.Unlock()
+	}
+	m.mu.Unlock()
+	for _, id := range old {
+		log.Printf("media: stream %s idle, closed", id)
+		m.Close(id)
+	}
+}
+
+// File is the on-disk path of one of the stream's files — the playlist, the init segment
+// or a media segment — and nothing else.
+func (s *Stream) File(name string) (string, bool) {
+	if !streamFile.MatchString(name) {
+		return "", false
+	}
+	s.touch()
+	return filepath.Join(s.dir, name), true
+}
+
+func (s *Stream) touch() { s.mu.Lock(); s.used = time.Now(); s.mu.Unlock() }
+
+func (s *Stream) running() bool {
+	s.mu.Lock()
+	defer s.mu.Unlock()
+	return s.proc != nil && !s.finished
+}
+
+// Status is read from ffmpeg's own progress file and the playlist.
+func (s *Stream) Status() StreamStatus {
+	s.mu.Lock()
+	st := StreamStatus{Running: s.proc != nil && !s.finished, Done: s.finished && s.failure == "", Error: s.failure}
+	s.mu.Unlock()
+	if b, err := os.ReadFile(filepath.Join(s.dir, "progress")); err == nil {
+		st.Progress, st.Speed = parseProgress(b)
+	}
+	if b, err := os.ReadFile(filepath.Join(s.dir, "index.m3u8")); err == nil {
+		st.Segments = strings.Count(string(b), "#EXTINF")
+	}
+	return st
+}
+
+// parseProgress takes the last out_time_us and speed from ffmpeg's -progress output.
+func parseProgress(b []byte) (seconds, speed float64) {
+	sc := bufio.NewScanner(strings.NewReader(string(b)))
+	for sc.Scan() {
+		k, v, ok := strings.Cut(sc.Text(), "=")
+		if !ok {
+			continue
+		}
+		v = strings.TrimSpace(v)
+		switch k {
+		case "out_time_us":
+			if us, err := strconv.ParseInt(v, 10, 64); err == nil && us >= 0 {
+				seconds = float64(us) / 1e6
+			}
+		case "speed":
+			if x, err := strconv.ParseFloat(strings.TrimSuffix(v, "x"), 64); err == nil {
+				speed = x
+			}
+		}
+	}
+	return seconds, speed
+}
+
+func newID() string {
+	b := make([]byte, 8)
+	_, _ = rand.Read(b)
+	return hex.EncodeToString(b)
+}
@@ -0,0 +1,85 @@
+package media
+
+import (
+	"context"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+// The real thing, when ffmpeg is here: a generated clip goes through as H.264 and comes out
+// as a playlist of segments, the status follows it to the end, and closing removes it all.
+func TestStreamWithFFmpeg(t *testing.T) {
+	if _, err := exec.LookPath("ffmpeg"); err != nil {
+		t.Skip("no ffmpeg")
+	}
+	c := Probe(context.Background())
+	if c.Error != "" {
+		t.Skip(c.Error)
+	}
+	if EngineFor(c, "h264") == "" {
+		t.Skip("nothing here encodes h264")
+	}
+	dir := t.TempDir()
+	clip := filepath.Join(dir, "clip.mp4")
+	out, err := exec.Command("ffmpeg", "-nostdin", "-v", "error", "-f", "lavfi", "-i", "testsrc=size=640x360:rate=25:duration=9", "-f", "lavfi", "-i", "sine=frequency=440:duration=9",
+		"-c:v", "mpeg4", "-q:v", "5", "-c:a", "aac", "-shortest", clip).CombinedOutput()
+	if err != nil {
+		t.Skipf("could not make a clip: %s", out)
+	}
+	src, err := Inspect(context.Background(), c, clip, false)
+	if err != nil || src.Video == nil || src.Audio == nil || src.Video.Codec != "mpeg4" || src.Duration < 8 {
+		t.Fatalf("inspect: %+v %v", src, err)
+	}
+	m := NewStreamer(dir, "hamlab", 2)
+	s, err := m.Open(context.Background(), c, false, clip, "h264", "480p", src)
+	if err != nil {
+		t.Fatal(err)
+	}
+	if s.Width != 640 || s.Height != 360 || s.Engine == "" {
+		t.Fatalf("stream: %+v", s)
+	}
+	if p, ok := s.File("index.m3u8"); !ok {
+		t.Fatal("no playlist")
+	} else if !hasSegments(p) {
+		t.Fatal("Open returned before the first segment")
+	}
+	for _, bad := range []string{"../x", "progress", "seg1.m4s", "index.m3u8/", "init.mp4.tmp"} {
+		if _, ok := s.File(bad); ok {
+			t.Fatalf("%q must not be served", bad)
+		}
+	}
+	// the same request is the same stream
+	if again, err := m.Open(context.Background(), c, false, clip, "h264", "480p", src); err != nil || again.ID != s.ID {
+		t.Fatal("not reused")
+	}
+	var st StreamStatus
+	for i := 0; i < 120; i++ {
+		st = s.Status()
+		if st.Done || st.Error != "" {
+			break
+		}
+		time.Sleep(250 * time.Millisecond)
+	}
+	if !st.Done || st.Error != "" || st.Segments < 2 || st.Progress < 8 {
+		t.Fatalf("status at the end: %+v", st)
+	}
+	if init, _ := s.File("init.mp4"); !exists(init) {
+		t.Fatal("no init segment")
+	}
+	m.Close(s.ID)
+	if _, ok := m.Find(s.ID); ok || exists(s.dir) {
+		t.Fatal("close must forget and remove")
+	}
+	// an unplayable source is a DecodeError, and leaves nothing behind
+	bad := filepath.Join(dir, "bad.mkv")
+	_ = os.WriteFile(bad, []byte("not a video"), 0o644)
+	if _, err := Inspect(context.Background(), c, bad, false); err == nil {
+		t.Fatal("inspect of garbage")
+	}
+	if left, _ := os.ReadDir(m.dir); len(left) != 0 {
+		t.Fatalf("left behind: %v", left)
+	}
+}
@@ -0,0 +1,142 @@
+package media
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"os/exec"
+	"strconv"
+	"strings"
+
+	"hamlab/internal/priv"
+)
+
+// Track is one stream of a media file, as ffprobe reports it.
+type Track struct {
+	Index         int     `json:"index"`
+	Type          string  `json:"type"` // video | audio
+	Codec         string  `json:"codec"`
+	Profile       string  `json:"profile,omitempty"`
+	PixFmt        string  `json:"pix_fmt,omitempty"`
+	Width         int     `json:"width,omitempty"`
+	Height        int     `json:"height,omitempty"`
+	FPS           float64 `json:"fps,omitempty"`
+	ColorTransfer string  `json:"color_transfer,omitempty"` // smpte2084 / arib-std-b67 mean HDR
+	Channels      int     `json:"channels,omitempty"`
+	AttachedPic   bool    `json:"attached_pic,omitempty"`
+}
+
+// Info is what a file holds: the picture to take, the sound to go with it, and the whole.
+type Info struct {
+	Container string  `json:"container"` // "matroska,webm", "mov,mp4,m4a,3gp,3g2,mj2"
+	Duration  float64 `json:"duration"`
+	BitRate   int64   `json:"bit_rate,omitempty"` // bits per second, whole file
+	Size      int64   `json:"size,omitempty"`
+	Video     *Track  `json:"video,omitempty"` // the first real picture stream; cover art is not it
+	Audio     *Track  `json:"audio,omitempty"` // the first sound stream
+}
+
+// HDR reports a picture that needs tone mapping to look right on an SDR screen.
+func (i Info) HDR() bool {
+	return i.Video != nil && (i.Video.ColorTransfer == "smpte2084" || i.Video.ColorTransfer == "arib-std-b67")
+}
+
+type probeJSON struct {
+	Streams []struct {
+		Index         int    `json:"index"`
+		CodecType     string `json:"codec_type"`
+		CodecName     string `json:"codec_name"`
+		Profile       string `json:"profile"`
+		PixFmt        string `json:"pix_fmt"`
+		Width         int    `json:"width"`
+		Height        int    `json:"height"`
+		RFrameRate    string `json:"r_frame_rate"`
+		AvgFrameRate  string `json:"avg_frame_rate"`
+		ColorTransfer string `json:"color_transfer"`
+		Channels      int    `json:"channels"`
+		Disposition   struct {
+			AttachedPic int `json:"attached_pic"`
+		} `json:"disposition"`
+	} `json:"streams"`
+	Format struct {
+		FormatName string `json:"format_name"`
+		Duration   string `json:"duration"`
+		BitRate    string `json:"bit_rate"`
+		Size       string `json:"size"`
+	} `json:"format"`
+}
+
+// Inspect asks ffprobe what a file is. As root through sudo when asked, for a file only
+// root may read. An error about the file itself is a DecodeError.
+func Inspect(ctx context.Context, c Caps, path string, root bool) (Info, error) {
+	if c.FFprobe == "" {
+		return Info{}, errors.New("ffprobe is not installed")
+	}
+	argv := []string{c.FFprobe, "-v", "error", "-show_entries",
+		"stream=index,codec_type,codec_name,profile,pix_fmt,width,height,r_frame_rate,avg_frame_rate,color_transfer,channels,disposition:format=format_name,duration,bit_rate,size",
+		"-of", "json", path}
+	if root {
+		argv = priv.Wrap(argv...)
+	}
+	cmd := exec.CommandContext(ctx, argv[0], argv[1:]...)
+	var errb bytes.Buffer
+	cmd.Stderr = &errb
+	out, err := cmd.Output()
+	if err != nil {
+		if ctx.Err() != nil {
+			return Info{}, ctx.Err()
+		}
+		msg := lastLine(errb.String())
+		if msg == "" {
+			msg = "ffprobe: " + err.Error()
+		}
+		return Info{}, &DecodeError{Msg: msg}
+	}
+	var pj probeJSON
+	if err := json.Unmarshal(out, &pj); err != nil {
+		return Info{}, &DecodeError{Msg: "ffprobe: unreadable answer"}
+	}
+	in := Info{Container: pj.Format.FormatName}
+	in.Duration, _ = strconv.ParseFloat(pj.Format.Duration, 64)
+	in.BitRate, _ = strconv.ParseInt(pj.Format.BitRate, 10, 64)
+	in.Size, _ = strconv.ParseInt(pj.Format.Size, 10, 64)
+	var art *Track
+	for _, s := range pj.Streams {
+		st := &Track{Index: s.Index, Type: s.CodecType, Codec: s.CodecName, Profile: s.Profile, PixFmt: s.PixFmt, Width: s.Width, Height: s.Height,
+			ColorTransfer: s.ColorTransfer, Channels: s.Channels, AttachedPic: s.Disposition.AttachedPic != 0}
+		st.FPS = fps(s.AvgFrameRate)
+		if st.FPS == 0 {
+			st.FPS = fps(s.RFrameRate)
+		}
+		switch {
+		case s.CodecType == "video" && st.AttachedPic:
+			if art == nil {
+				art = st
+			}
+		case s.CodecType == "video" && in.Video == nil:
+			in.Video = st
+		case s.CodecType == "audio" && in.Audio == nil:
+			in.Audio = st
+		}
+	}
+	if in.Video == nil {
+		in.Video = art // cover art is the only picture there is
+	}
+	return in, nil
+}
+
+// fps parses ffprobe's "60000/1001".
+func fps(r string) float64 {
+	n, d, ok := strings.Cut(r, "/")
+	if !ok {
+		v, _ := strconv.ParseFloat(r, 64)
+		return v
+	}
+	nf, _ := strconv.ParseFloat(n, 64)
+	df, _ := strconv.ParseFloat(d, 64)
+	if df == 0 {
+		return 0
+	}
+	return nf / df
+}
@@ -0,0 +1,26 @@
+package media
+
+import (
+	"fmt"
+	"os"
+	"os/user"
+	"strconv"
+	"syscall"
+)
+
+// ownerOf is "root:render 0660" for a device node, the thing to say when it cannot be opened.
+func ownerOf(st os.FileInfo) string {
+	sys, ok := st.Sys().(*syscall.Stat_t)
+	if !ok {
+		return ""
+	}
+	u := strconv.Itoa(int(sys.Uid))
+	if x, err := user.LookupId(u); err == nil {
+		u = x.Username
+	}
+	g := strconv.Itoa(int(sys.Gid))
+	if x, err := user.LookupGroupId(g); err == nil {
+		g = x.Name
+	}
+	return fmt.Sprintf("%s:%s %04o", u, g, st.Mode().Perm())
+}
@@ -0,0 +1,656 @@
+// Package thumbs makes the Files tab's previews: one small JPEG for an image or a video,
+// by ffmpeg, decoded on a GPU where the machine has one it can use and on the CPU
+// otherwise.
+//
+// Nothing about the machine is assumed. A probe looks ffmpeg and ffprobe up, opens every
+// /dev/dri/renderD* and exercises it (a VAAPI upload and download of a synthetic frame),
+// so a node the daemon's user cannot open, or a driver that does not speak VAAPI, is
+// reported once rather than tried per file. vainfo, where installed, says which codecs
+// each node decodes, and a video goes to the first node that lists its codec; without
+// vainfo the first working node is tried and ffmpeg falls back to software on its own when
+// the stream turns out unsupported. A hardware run that fails outright is retried on the
+// CPU before the file is called undecodable. Images are always decoded on the CPU: one
+// frame of a JPEG at a reduced DCT size costs less than the trip through a GPU.
+package media
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"errors"
+	"fmt"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+	"time"
+
+	"hamlab/internal/metrics"
+	"hamlab/internal/priv"
+)
+
+// GPU is one hardware decoder as the probe found it.
+type GPU struct {
+	API        string   `json:"api"`                  // vaapi | cuda
+	Device     string   `json:"device"`               // /dev/dri/renderD128; "0" for cuda (its device index)
+	Name       string   `json:"name,omitempty"`       // "Intel Arc A380"
+	Codecs     []string `json:"codecs,omitempty"`     // ffmpeg codec names it decodes; nil when nothing could say
+	Encodes    []string `json:"encodes,omitempty"`    // ffmpeg codec names it encodes, from vainfo
+	Integrated bool     `json:"integrated,omitempty"` // on the CPU die; a card on the bus is preferred for encoding
+	Reason     string   `json:"reason,omitempty"`     // Unusable only: why
+	Permission bool     `json:"permission,omitempty"` // Unusable only: the node exists but this user may not open it
+}
+
+// Caps is what the machine can make previews with, as probed.
+type Caps struct {
+	FFmpeg   string    `json:"ffmpeg,omitempty"`
+	FFprobe  string    `json:"ffprobe,omitempty"`
+	Nice     string    `json:"nice,omitempty"`
+	Version  string    `json:"version,omitempty"`
+	GPUs     []GPU     `json:"gpus"`               // usable, in node order
+	Encoders []string  `json:"encoders,omitempty"` // the encoders ffmpeg itself was built with that matter here
+	Unusable []GPU     `json:"unusable,omitempty"` // render nodes that exist but cannot be used, with the reason
+	Error    string    `json:"error,omitempty"`    // why nothing can be made at all
+	ProbedAt time.Time `json:"probed_at"`
+}
+
+// Opts shapes one preview.
+type Opts struct {
+	Size    int           // the long edge in pixels; 256 when zero
+	Timeout time.Duration // for the whole job, ffprobe and every ffmpeg attempt; 30 s when zero
+}
+
+func (o Opts) defaults() Opts {
+	if o.Size <= 0 {
+		o.Size = 256
+	}
+	if o.Timeout <= 0 {
+		o.Timeout = 30 * time.Second
+	}
+	return o
+}
+
+// Result is a finished preview.
+type Result struct {
+	JPEG   []byte `json:"-"`
+	Engine string `json:"engine"` // "cpu", or "vaapi:/dev/dri/renderD129"
+	Codec  string `json:"codec"`
+	Width  int    `json:"width"`
+	Height int    `json:"height"`
+}
+
+// ErrUnsupported: not an image or a video by its name.
+var ErrUnsupported = errors.New("not an image or video")
+
+// A DecodeError is ffmpeg's verdict on the file itself. It will not change until the
+// file does, so the caller may remember it.
+type DecodeError struct{ Msg string }
+
+func (e *DecodeError) Error() string { return e.Msg }
+
+// ---- what gets a preview ----
+
+var imageExt = set("png jpg jpeg jpe jfif gif webp bmp tif tiff avif heic heif hif jxl svg ico psd tga thm")
+var videoExt = set("mp4 m4v mkv webm mov avi wmv flv mpg mpeg mpe m2v ts m2ts mts 3gp 3g2 ogv ogm mxf vob asf rm rmvb divx f4v mjpeg mjpg 360 osv insv lrf")
+var audioExt = set("mp3 flac m4a m4b aac ogg oga opus wav wma aiff aif alac ape wv mka")
+
+func set(s string) map[string]bool {
+	m := map[string]bool{}
+	for _, w := range strings.Fields(s) {
+		m[w] = true
+	}
+	return m
+}
+
+// Kind is "image", "video", "audio" or "" for a file name. An audio file's preview is its
+// cover art, when it carries any.
+func Kind(name string) string {
+	ext := strings.ToLower(strings.TrimPrefix(filepath.Ext(name), "."))
+	switch {
+	case imageExt[ext]:
+		return "image"
+	case videoExt[ext]:
+		return "video"
+	case audioExt[ext]:
+		return "audio"
+	}
+	return ""
+}
+
+// ---- the probe ----
+
+// Probe finds out what this process can make previews with. It runs ffmpeg against every
+// render node, so it takes a few hundred milliseconds; callers keep the answer.
+func Probe(ctx context.Context) Caps {
+	c := Caps{ProbedAt: time.Now(), GPUs: []GPU{}}
+	c.FFmpeg, _ = exec.LookPath("ffmpeg")
+	c.FFprobe, _ = exec.LookPath("ffprobe")
+	c.Nice, _ = exec.LookPath("nice")
+	switch {
+	case c.FFmpeg == "" && c.FFprobe == "":
+		c.Error = "ffmpeg is not installed"
+	case c.FFmpeg == "":
+		c.Error = "ffmpeg is not installed (ffprobe is)"
+	case c.FFprobe == "":
+		c.Error = "ffprobe is not installed (ffmpeg is)"
+	}
+	if c.Error != "" {
+		return c
+	}
+	c.Version = ffmpegVersion(ctx, c.FFmpeg)
+	c.Encoders = encoders(ctx, c.FFmpeg)
+	accels := hwaccels(ctx, c.FFmpeg)
+	if accels["vaapi"] {
+		nodes, _ := filepath.Glob("/dev/dri/renderD*")
+		sort.Strings(nodes)
+		vainfo, _ := exec.LookPath("vainfo")
+		for _, dev := range nodes {
+			g := GPU{API: "vaapi", Device: dev, Name: metrics.RenderNodeName(dev), Integrated: metrics.RenderNodeIntegrated(dev)}
+			if err := openable(dev); err != nil {
+				g.Reason, g.Permission = err.Error(), errors.Is(err, os.ErrPermission)
+				c.Unusable = append(c.Unusable, g)
+				continue
+			}
+			if msg := hwWorks(ctx, c.FFmpeg, "vaapi=va:"+dev); msg != "" {
+				g.Reason = msg
+				c.Unusable = append(c.Unusable, g)
+				continue
+			}
+			if vainfo != "" {
+				g.Codecs, g.Encodes = vainfoCodecs(ctx, vainfo, dev)
+			}
+			c.GPUs = append(c.GPUs, g)
+		}
+	}
+	if accels["cuda"] && exists("/dev/nvidiactl") {
+		g := GPU{API: "cuda", Device: "0", Name: "NVIDIA GPU"}
+		if msg := hwWorks(ctx, c.FFmpeg, "cuda=cu:0"); msg != "" {
+			g.Reason = msg
+			c.Unusable = append(c.Unusable, g)
+		} else {
+			c.GPUs = append(c.GPUs, g)
+		}
+	}
+	return c
+}
+
+// openable: the node can be opened read-write, which is what a VAAPI driver needs. The
+// usual reason it can't be is the owning group: a render node is root:render 0660 on
+// most distributions, and a daemon running as an ordinary user is not in render.
+func openable(dev string) error {
+	f, err := os.OpenFile(dev, os.O_RDWR, 0)
+	if err != nil {
+		if errors.Is(err, os.ErrPermission) {
+			owner := ""
+			if st, serr := os.Stat(dev); serr == nil {
+				owner = ownerOf(st)
+			}
+			if owner != "" {
+				return fmt.Errorf("%w: %s is %s", os.ErrPermission, dev, owner)
+			}
+			return fmt.Errorf("%w: cannot open %s", os.ErrPermission, dev)
+		}
+		return err
+	}
+	f.Close()
+	return nil
+}
+
+// hwWorks initialises a hardware device in ffmpeg and moves one synthetic frame through
+// it. "" when it works, else the last thing ffmpeg said.
+func hwWorks(ctx context.Context, ffmpeg, device string) string {
+	ctx, cancel := context.WithTimeout(ctx, 15*time.Second)
+	defer cancel()
+	name, rest, _ := strings.Cut(device, "=") // "vaapi", "va:/dev/…"
+	label, _, _ := strings.Cut(rest, ":")     // "va"
+	cmd := exec.CommandContext(ctx, ffmpeg, "-nostdin", "-hide_banner", "-v", "error", "-init_hw_device", device, "-filter_hw_device", label,
+		"-f", "lavfi", "-i", "color=c=black:s=64x64:r=1:d=1", "-vf", "format=nv12,hwupload,hwdownload,format=nv12", "-frames:v", "1", "-f", "null", "-")
+	var errb bytes.Buffer
+	cmd.Stderr = &errb
+	if err := cmd.Run(); err != nil {
+		msg := lastLine(errb.String())
+		if msg == "" {
+			msg = err.Error()
+		}
+		return name + ": " + msg
+	}
+	return ""
+}
+
+func ffmpegVersion(ctx context.Context, ffmpeg string) string {
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	out, _ := exec.CommandContext(ctx, ffmpeg, "-version").Output()
+	f := strings.Fields(string(out)) // "ffmpeg version 7.1.5-0+deb13u1 Copyright …"
+	if len(f) >= 3 && f[1] == "version" {
+		v := f[2]
+		if i := strings.IndexAny(v, "-+~"); i > 0 {
+			v = v[:i]
+		}
+		return v
+	}
+	return ""
+}
+
+func hwaccels(ctx context.Context, ffmpeg string) map[string]bool {
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	out, _ := exec.CommandContext(ctx, ffmpeg, "-hide_banner", "-hwaccels").Output()
+	m := map[string]bool{}
+	for _, l := range strings.Split(string(out), "\n") {
+		l = strings.TrimSpace(l)
+		if l != "" && !strings.HasPrefix(l, "Hardware acceleration methods") {
+			m[l] = true
+		}
+	}
+	return m
+}
+
+var vaProfileRe = regexp.MustCompile(`VAProfile([A-Za-z0-9]+?)(?:Simple|Main|High|Profile|Baseline|Constrained|Scc|Advanced|Version|Stereo|Multiview)\w*\s*:\s*VAEntrypoint(VLD|EncSlice|EncSliceLP)\b`)
+
+// wantedEncoders are the encoders this package may ask ffmpeg for.
+var wantedEncoders = set("libx264 libx265 libsvtav1 libaom-av1 libopenh264 h264_vaapi hevc_vaapi av1_vaapi aac")
+
+// encoders lists the wanted encoders this ffmpeg was built with.
+func encoders(ctx context.Context, ffmpeg string) []string {
+	ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
+	defer cancel()
+	out, _ := exec.CommandContext(ctx, ffmpeg, "-hide_banner", "-encoders").Output()
+	var found []string
+	for _, l := range strings.Split(string(out), "\n") {
+		f := strings.Fields(l)
+		if len(f) >= 2 && wantedEncoders[f[1]] {
+			found = append(found, f[1])
+		}
+	}
+	sort.Strings(found)
+	return found
+}
+
+// vaCodec maps a VAProfile family to the ffmpeg codec it decodes.
+var vaCodec = map[string]string{"H264": "h264", "HEVC": "hevc", "VP9": "vp9", "AV1": "av1", "MPEG2": "mpeg2video", "VC1": "vc1", "VP8": "vp8", "JPEG": "mjpeg", "MPEG4": "mpeg4", "H263": "h263"}
+
+func vainfoCodecs(ctx context.Context, vainfo, dev string) (decodes, encodes []string) {
+	ctx, cancel := context.WithTimeout(ctx, 10*time.Second)
+	defer cancel()
+	out, _ := exec.CommandContext(ctx, vainfo, "--display", "drm", "--device", dev).Output()
+	return parseVainfo(string(out))
+}
+
+// parseVainfo names the codecs the decode (VLD) and encode (EncSlice) profiles cover,
+// the way ffmpeg names them.
+func parseVainfo(text string) (decodes, encodes []string) {
+	dec, enc := map[string]bool{}, map[string]bool{}
+	for _, m := range vaProfileRe.FindAllStringSubmatch(text, -1) {
+		c, ok := vaCodec[m[1]]
+		if !ok {
+			continue
+		}
+		if m[2] == "VLD" {
+			dec[c] = true
+		} else {
+			enc[c] = true
+		}
+	}
+	return keys(dec), keys(enc)
+}
+
+func keys(m map[string]bool) []string {
+	if len(m) == 0 {
+		return nil
+	}
+	out := make([]string, 0, len(m))
+	for c := range m {
+		out = append(out, c)
+	}
+	sort.Strings(out)
+	return out
+}
+
+// pick is the GPU for a codec: the first that lists it, else the first that could not
+// say (ffmpeg will fall back to software by itself if that guess is wrong), else none.
+func (c Caps) pick(codec string) *GPU {
+	var unknown *GPU
+	for i := range c.GPUs {
+		g := &c.GPUs[i]
+		if g.Codecs == nil {
+			if unknown == nil {
+				unknown = g
+			}
+			continue
+		}
+		for _, x := range g.Codecs {
+			if x == codec {
+				return g
+			}
+		}
+	}
+	return unknown
+}
+
+// ---- making one ----
+
+type fileInfo struct {
+	index    string // the stream to take
+	codec    string
+	w, h     int
+	duration float64
+}
+
+type attempt struct {
+	gpu    *GPU
+	lowres int
+	seek   float64
+}
+
+func (a attempt) engine() string {
+	if a.gpu == nil {
+		return "cpu"
+	}
+	return a.gpu.API + ":" + a.gpu.Device
+}
+
+// Make produces the preview of one file.
+func Make(ctx context.Context, c Caps, path string, o Opts) (Result, error) {
+	kind := Kind(path)
+	if kind == "" {
+		return Result{}, ErrUnsupported
+	}
+	if c.Error != "" {
+		return Result{}, errors.New(c.Error)
+	}
+	o = o.defaults()
+	ctx, cancel := context.WithTimeout(ctx, o.Timeout)
+	defer cancel()
+	fi, err := probeFile(ctx, c, path)
+	if err != nil {
+		return Result{}, err
+	}
+	var last string
+	for _, eng := range engines(c, kind, fi) {
+		for _, a := range attempts(eng, kind, fi, o.Size) {
+			data, msg, err := run(ctx, c, a, path, fi, o.Size)
+			if err == nil && len(data) > 0 {
+				return Result{JPEG: data, Engine: a.engine(), Codec: fi.codec, Width: fi.w, Height: fi.h}, nil
+			}
+			if ctx.Err() != nil {
+				return Result{}, ctx.Err() // the clock ran out: not the file's fault
+			}
+			if err != nil { // the decoder refused: try the next engine, not another seek
+				last = msg
+				break
+			}
+			last = "no frame at " + strconv.FormatFloat(a.seek, 'f', 1, 64) + " s"
+		}
+	}
+	if last == "" {
+		last = "could not decode"
+	}
+	return Result{}, &DecodeError{Msg: last}
+}
+
+// engines is the order to try: the fitting GPU first for a video, then the CPU.
+func engines(c Caps, kind string, fi fileInfo) []*GPU {
+	if kind == "video" {
+		if g := c.pick(fi.codec); g != nil {
+			return []*GPU{g, nil}
+		}
+	}
+	return []*GPU{nil}
+}
+
+// attempts for one engine: a seek into a video, then from its start if that found no
+// frame (a wrong duration in the header); a reduced-size decode of a JPEG, then full size.
+func attempts(gpu *GPU, kind string, fi fileInfo, size int) []attempt {
+	if kind == "video" {
+		s := seekFor(fi.duration)
+		if s > 0 {
+			return []attempt{{gpu: gpu, seek: s}, {gpu: gpu}}
+		}
+		return []attempt{{gpu: gpu}}
+	}
+	if fi.codec == "mjpeg" && gpu == nil {
+		if l := lowresFor(fi.w, fi.h, size); l > 0 {
+			return []attempt{{lowres: l}, {}}
+		}
+	}
+	return []attempt{{gpu: gpu}}
+}
+
+// seekFor: a tenth of the way in, never more than 30 s, so a title card or a black lead-in
+// is skipped and a long file still seeks to a keyframe near its start.
+func seekFor(duration float64) float64 {
+	if duration <= 0 {
+		return 0
+	}
+	s := duration / 10
+	if s > 30 {
+		s = 30
+	}
+	if s < 0.5 {
+		return 0
+	}
+	return s
+}
+
+// lowresFor: how many halvings a JPEG decoder may take while the picture stays at least
+// twice the preview size. libjpeg does this in the DCT, so a 24 MP photo decodes at 1.5 MP.
+func lowresFor(w, h, size int) int {
+	m := w
+	if h < m {
+		m = h
+	}
+	l := 0
+	for l < 3 && m>>(l+1) >= size*2 {
+		l++
+	}
+	return l
+}
+
+type probeOut struct {
+	Streams []struct {
+		Index       int    `json:"index"`
+		Codec       string `json:"codec_name"`
+		Width       int    `json:"width"`
+		Height      int    `json:"height"`
+		Disposition struct {
+			AttachedPic int `json:"attached_pic"`
+		} `json:"disposition"`
+	} `json:"streams"`
+	Format struct {
+		Duration string `json:"duration"`
+	} `json:"format"`
+}
+
+// probeFile asks ffprobe which stream to take and what is in it.
+func probeFile(ctx context.Context, c Caps, path string) (fileInfo, error) {
+	cmd := exec.CommandContext(ctx, c.FFprobe, "-v", "error", "-select_streams", "v", "-show_entries", "stream=index,codec_name,width,height,disposition:format=duration", "-of", "json", path)
+	var errb bytes.Buffer
+	cmd.Stderr = &errb
+	out, err := cmd.Output()
+	if err != nil {
+		if ctx.Err() != nil {
+			return fileInfo{}, ctx.Err()
+		}
+		msg := lastLine(errb.String())
+		if msg == "" {
+			msg = "ffprobe: " + err.Error()
+		}
+		return fileInfo{}, &DecodeError{Msg: msg}
+	}
+	var po probeOut
+	if err := json.Unmarshal(out, &po); err != nil {
+		return fileInfo{}, &DecodeError{Msg: "ffprobe: unreadable answer"}
+	}
+	if len(po.Streams) == 0 {
+		return fileInfo{}, &DecodeError{Msg: "no video stream"}
+	}
+	s := po.Streams[0]
+	for _, x := range po.Streams { // cover art rides along as a video stream; the picture is not the film
+		if x.Disposition.AttachedPic == 0 {
+			s = x
+			break
+		}
+	}
+	fi := fileInfo{index: strconv.Itoa(s.Index), codec: s.Codec, w: s.Width, h: s.Height}
+	fi.duration, _ = strconv.ParseFloat(po.Format.Duration, 64)
+	return fi, nil
+}
+
+// run is one ffmpeg: the JPEG on success; on failure what ffmpeg said and the error.
+// Empty output with a clean exit means the seek found nothing.
+func run(ctx context.Context, c Caps, a attempt, path string, fi fileInfo, size int) ([]byte, string, error) {
+	args := []string{"-nostdin", "-hide_banner", "-loglevel", "error", "-y"}
+	if a.gpu != nil {
+		args = append(args, "-hwaccel", a.gpu.API, "-hwaccel_device", a.gpu.Device)
+	}
+	if a.lowres > 0 {
+		args = append(args, "-lowres", strconv.Itoa(a.lowres))
+	}
+	if a.seek > 0 {
+		args = append(args, "-noaccurate_seek", "-ss", strconv.FormatFloat(a.seek, 'f', 3, 64))
+	}
+	args = append(args, "-i", path, "-map", "0:"+fi.index, "-frames:v", "1",
+		"-vf", fmt.Sprintf("scale=w=%d:h=%d:force_original_aspect_ratio=decrease:flags=bicubic", size, size),
+		"-f", "image2pipe", "-c:v", "mjpeg", "-q:v", "4", "pipe:1")
+	name, argv := c.FFmpeg, args
+	if c.Nice != "" { // a burst of previews must not crowd out what the machine is for
+		name, argv = c.Nice, append([]string{"-n", "10", c.FFmpeg}, args...)
+	}
+	cmd := exec.CommandContext(ctx, name, argv...)
+	var out, errb bytes.Buffer
+	cmd.Stdout, cmd.Stderr = &out, &errb
+	if err := cmd.Run(); err != nil {
+		msg := lastLine(errb.String())
+		if msg == "" {
+			msg = err.Error()
+		}
+		return nil, msg, err
+	}
+	return out.Bytes(), "", nil
+}
+
+// ---- the same, as root ----
+
+// ProbeRoot is Probe run as root through this binary, for the Files tab's root mode: root
+// opens every render node, whatever group the daemon's user is in.
+func ProbeRoot(ctx context.Context, self string) (Caps, error) {
+	full := priv.Wrap(self, "thumb", "--probe")
+	cmd := exec.CommandContext(ctx, full[0], full[1:]...)
+	var errb bytes.Buffer
+	cmd.Stderr = &errb
+	out, err := cmd.Output()
+	if err != nil {
+		if msg := lastLine(errb.String()); msg != "" {
+			return Caps{}, errors.New(msg)
+		}
+		return Caps{}, err
+	}
+	var c Caps
+	if err := json.Unmarshal(out, &c); err != nil {
+		return Caps{}, err
+	}
+	return c, nil
+}
+
+type helperOut struct {
+	Engine    string `json:"engine,omitempty"`
+	Codec     string `json:"codec,omitempty"`
+	Width     int    `json:"width,omitempty"`
+	Height    int    `json:"height,omitempty"`
+	JPEG      []byte `json:"jpeg,omitempty"`
+	Error     string `json:"error,omitempty"`
+	Permanent bool   `json:"permanent,omitempty"` // a DecodeError: the file, not the moment
+}
+
+// MakeRoot is Make run as root through this binary, with the caps ProbeRoot found.
+func MakeRoot(ctx context.Context, self string, c Caps, path string, o Opts) (Result, error) {
+	o = o.defaults()
+	caps, _ := json.Marshal(c)
+	full := priv.Wrap(self, "thumb", "--size", strconv.Itoa(o.Size), "--timeout", o.Timeout.String(), path)
+	cmd := exec.CommandContext(ctx, full[0], full[1:]...)
+	cmd.Stdin = bytes.NewReader(caps)
+	var errb bytes.Buffer
+	cmd.Stderr = &errb
+	out, err := cmd.Output()
+	if err != nil {
+		if ctx.Err() != nil {
+			return Result{}, ctx.Err()
+		}
+		if msg := lastLine(errb.String()); msg != "" {
+			return Result{}, errors.New(msg)
+		}
+		return Result{}, err
+	}
+	var h helperOut
+	if err := json.Unmarshal(out, &h); err != nil {
+		return Result{}, err
+	}
+	if h.Error != "" {
+		if h.Permanent {
+			return Result{}, &DecodeError{Msg: h.Error}
+		}
+		return Result{}, errors.New(h.Error)
+	}
+	return Result{JPEG: h.JPEG, Engine: h.Engine, Codec: h.Codec, Width: h.Width, Height: h.Height}, nil
+}
+
+// Helper implements `hamlab thumb …`, the root side of the above. `--probe` prints Caps;
+// `[--size N] [--timeout D] <path>` reads Caps from stdin and prints the preview as JSON.
+// Returns the exit code.
+func Helper(args []string, stdin io.Reader, stdout, stderr io.Writer) int {
+	fail := func(err error) int { fmt.Fprintln(stderr, err.Error()); return 1 }
+	ctx := context.Background()
+	o := Opts{}
+	path := ""
+	for i := 0; i < len(args); i++ {
+		switch a := args[i]; {
+		case a == "--probe":
+			return emit(stdout, Probe(ctx), stderr)
+		case a == "--size" && i+1 < len(args):
+			o.Size, _ = strconv.Atoi(args[i+1])
+			i++
+		case a == "--timeout" && i+1 < len(args):
+			o.Timeout, _ = time.ParseDuration(args[i+1])
+			i++
+		case strings.HasPrefix(a, "-"):
+			return fail(errors.New("usage: hamlab thumb --probe | [--size N] [--timeout D] <path>"))
+		default:
+			path = a
+		}
+	}
+	if path == "" || !filepath.IsAbs(path) {
+		return fail(errors.New("usage: hamlab thumb --probe | [--size N] [--timeout D] <absolute path>"))
+	}
+	var c Caps
+	if err := json.NewDecoder(io.LimitReader(stdin, 1<<20)).Decode(&c); err != nil {
+		return fail(fmt.Errorf("caps on stdin: %w", err))
+	}
+	res, err := Make(ctx, c, path, o)
+	if err != nil {
+		var de *DecodeError
+		return emit(stdout, helperOut{Error: err.Error(), Permanent: errors.As(err, &de)}, stderr)
+	}
+	return emit(stdout, helperOut{Engine: res.Engine, Codec: res.Codec, Width: res.Width, Height: res.Height, JPEG: res.JPEG}, stderr)
+}
+
+func emit(w io.Writer, v any, stderr io.Writer) int {
+	if err := json.NewEncoder(w).Encode(v); err != nil {
+		fmt.Fprintln(stderr, err.Error())
+		return 1
+	}
+	return 0
+}
+
+// ---- small helpers ----
+
+func lastLine(s string) string {
+	lines := strings.Split(strings.TrimSpace(s), "\n")
+	return strings.TrimSpace(lines[len(lines)-1])
+}
+
+func exists(p string) bool { _, err := os.Stat(p); return err == nil }
@@ -0,0 +1,253 @@
+package media
+
+import (
+	"bytes"
+	"context"
+	"image"
+	"image/color"
+	"image/jpeg"
+	"image/png"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"testing"
+	"time"
+)
+
+func TestKind(t *testing.T) {
+	for name, want := range map[string]string{"a.JPG": "image", "b.heic": "image", "c.mkv": "video", "GH010098.MP4": "video", "x.OSV": "video", "d.txt": "", "e": "", ".jpg": "image"} {
+		if got := Kind(name); got != want {
+			t.Errorf("Kind(%q) = %q, want %q", name, got, want)
+		}
+	}
+}
+
+func TestKeyFollowsTheFile(t *testing.T) {
+	a := Key("/x/a.jpg", 10, 20)
+	if a != Key("/x/a.jpg", 10, 20) || len(a) != 64 {
+		t.Fatal("key is not stable")
+	}
+	for _, b := range []string{Key("/x/b.jpg", 10, 20), Key("/x/a.jpg", 11, 20), Key("/x/a.jpg", 10, 21)} {
+		if b == a {
+			t.Fatal("key ignores part of the file's identity")
+		}
+	}
+}
+
+func TestParseVainfo(t *testing.T) {
+	text := `vainfo: Driver version: Intel iHD driver for Intel(R) Gen Graphics - 25.2.3 ()
+      VAProfileMPEG2Simple            :	VAEntrypointVLD
+      VAProfileH264Main               :	VAEntrypointVLD
+      VAProfileH264High               :	VAEntrypointEncSliceLP
+      VAProfileJPEGBaseline           :	VAEntrypointVLD
+      VAProfileHEVCMain10             :	VAEntrypointVLD
+      VAProfileHEVCMain10             :	VAEntrypointEncSlice
+      VAProfileHEVCMain444_12         :	VAEntrypointVLD
+      VAProfileVP9Profile2            :	VAEntrypointVLD
+      VAProfileAV1Profile0            :	VAEntrypointEncSliceLP
+`
+	dec, enc := parseVainfo(text)
+	same := func(got, want []string) bool {
+		if len(got) != len(want) {
+			return false
+		}
+		for i := range want {
+			if got[i] != want[i] {
+				return false
+			}
+		}
+		return true
+	}
+	if !same(dec, []string{"h264", "hevc", "mjpeg", "mpeg2video", "vp9"}) {
+		t.Fatalf("decodes = %v", dec)
+	}
+	if !same(enc, []string{"av1", "h264", "hevc"}) {
+		t.Fatalf("encodes = %v", enc)
+	}
+	if d, e := parseVainfo(""); d != nil || e != nil {
+		t.Fatal("nothing from nothing")
+	}
+}
+
+func TestPickAndEngines(t *testing.T) {
+	igpu := GPU{API: "vaapi", Device: "/dev/dri/renderD128", Codecs: []string{"h264", "hevc"}}
+	arc := GPU{API: "vaapi", Device: "/dev/dri/renderD129", Codecs: []string{"av1", "h264", "hevc"}}
+	c := Caps{FFmpeg: "ffmpeg", FFprobe: "ffprobe", GPUs: []GPU{igpu, arc}}
+	if g := c.pick("av1"); g == nil || g.Device != arc.Device {
+		t.Fatal("av1 should go to the card that lists it")
+	}
+	if g := c.pick("h264"); g == nil || g.Device != igpu.Device {
+		t.Fatal("h264 should go to the first card that lists it")
+	}
+	if g := c.pick("vc1"); g != nil {
+		t.Fatal("a codec nobody lists is software")
+	}
+	// a card nothing could describe is tried, after the ones that answered
+	c.GPUs = append(c.GPUs, GPU{API: "cuda", Device: "0"})
+	if g := c.pick("vc1"); g == nil || g.API != "cuda" {
+		t.Fatal("an undescribed card is the guess of last resort")
+	}
+	// videos: GPU then CPU; images: CPU only
+	if e := engines(c, "video", fileInfo{codec: "hevc"}); len(e) != 2 || e[0] == nil || e[1] != nil {
+		t.Fatal("a video tries the GPU, then the CPU")
+	}
+	if e := engines(c, "image", fileInfo{codec: "mjpeg"}); len(e) != 1 || e[0] != nil {
+		t.Fatal("an image is CPU only")
+	}
+}
+
+func TestAttempts(t *testing.T) {
+	a := attempts(nil, "video", fileInfo{duration: 120}, 256)
+	if len(a) != 2 || a[0].seek != 12 || a[1].seek != 0 {
+		t.Fatalf("video attempts = %+v", a)
+	}
+	if a := attempts(nil, "video", fileInfo{duration: 7200}, 256); a[0].seek != 30 {
+		t.Fatalf("seek capped at 30 s, got %v", a[0].seek)
+	}
+	if a := attempts(nil, "video", fileInfo{duration: 2}, 256); len(a) != 1 || a[0].seek != 0 {
+		t.Fatalf("a short clip is taken from its start, got %+v", a)
+	}
+	if a := attempts(nil, "image", fileInfo{codec: "mjpeg", w: 6000, h: 4000}, 256); len(a) != 2 || a[0].lowres != 2 || a[1].lowres != 0 {
+		t.Fatalf("jpeg attempts = %+v", a)
+	}
+	if a := attempts(nil, "image", fileInfo{codec: "mjpeg", w: 800, h: 600}, 256); len(a) != 1 || a[0].lowres != 0 {
+		t.Fatalf("a small jpeg decodes whole, got %+v", a)
+	}
+	if a := attempts(nil, "image", fileInfo{codec: "png", w: 6000, h: 4000}, 256); len(a) != 1 || a[0].lowres != 0 {
+		t.Fatalf("only jpeg has lowres, got %+v", a)
+	}
+}
+
+func TestCache(t *testing.T) {
+	c := NewCache(filepath.Join(t.TempDir(), "thumbs.db"))
+	k := Key("/a", 1, 2)
+	if _, found, err := c.Get(k); found || err != nil {
+		t.Fatal("an empty cache found something, or complained")
+	}
+	if _, err := os.Stat(c.Path); err == nil {
+		t.Fatal("a miss must not create the database")
+	}
+	if n, b := c.Stats(); n != 0 || b != 0 {
+		t.Fatal("stats of nothing")
+	}
+	if err := c.Put(k, Entry{Path: "/a", Engine: "cpu", Codec: "png", Width: 640, Height: 360, JPEG: []byte("jpeg")}); err != nil {
+		t.Fatal(err)
+	}
+	e, found, err := c.Get(k)
+	if err != nil || !found || string(e.JPEG) != "jpeg" || e.Engine != "cpu" || e.Width != 640 || e.Path != "/a" || e.Made.IsZero() {
+		t.Fatalf("put then get: %+v %v %v", e, found, err)
+	}
+	k2 := Key("/b", 1, 2)
+	if err := c.Put(k2, Entry{Path: "/b", Failure: "no video stream"}); err != nil {
+		t.Fatal(err)
+	}
+	if e, found, _ := c.Get(k2); !found || e.JPEG != nil || e.Failure != "no video stream" {
+		t.Fatal("a failure is remembered with its reason")
+	}
+	if err := c.Put(k, Entry{}); err == nil {
+		t.Fatal("an empty preview must not be kept")
+	}
+	// replacing an entry does not count it twice
+	if err := c.Put(k, Entry{Path: "/a", JPEG: []byte("jpeg2")}); err != nil {
+		t.Fatal(err)
+	}
+	n, b := c.Stats()
+	if n != 2 || b == 0 {
+		t.Fatalf("stats = %d entries, %d bytes", n, b)
+	}
+	// survives a reopen
+	if err := c.Close(); err != nil {
+		t.Fatal(err)
+	}
+	c2 := NewCache(c.Path)
+	if e, found, _ := c2.Get(k); !found || string(e.JPEG) != "jpeg2" {
+		t.Fatal("not there after reopening")
+	}
+	if n, _ := c2.Stats(); n != 2 {
+		t.Fatal("count lost on reopen")
+	}
+	c2.Close()
+}
+
+// The real thing, when ffmpeg is here: a PNG and a generated video each come back as a
+// JPEG no larger than the asked size, with the aspect kept.
+func TestMakeWithFFmpeg(t *testing.T) {
+	if _, err := exec.LookPath("ffmpeg"); err != nil {
+		t.Skip("no ffmpeg")
+	}
+	c := Probe(context.Background())
+	if c.Error != "" {
+		t.Skip(c.Error)
+	}
+	dir := t.TempDir()
+	img := image.NewRGBA(image.Rect(0, 0, 640, 360))
+	for y := 0; y < 360; y++ {
+		for x := 0; x < 640; x++ {
+			img.Set(x, y, color.RGBA{uint8(x / 3), uint8(y), 90, 255})
+		}
+	}
+	pngPath := filepath.Join(dir, "a.png")
+	f, _ := os.Create(pngPath)
+	_ = png.Encode(f, img)
+	f.Close()
+	res, err := Make(context.Background(), c, pngPath, Opts{Size: 200})
+	if err != nil {
+		t.Fatal(err)
+	}
+	check(t, res, 200, 112, "cpu")
+
+	// a two-second test pattern, with the always-built-in mpeg4 encoder
+	vid := filepath.Join(dir, "v.mp4")
+	out, err := exec.Command("ffmpeg", "-nostdin", "-v", "error", "-f", "lavfi", "-i", "testsrc=size=320x180:rate=10:duration=2", "-c:v", "mpeg4", "-q:v", "5", vid).CombinedOutput()
+	if err != nil {
+		t.Skipf("could not make a test video: %s", out)
+	}
+	res, err = Make(context.Background(), c, vid, Opts{Size: 100})
+	if err != nil {
+		t.Fatal(err)
+	}
+	check(t, res, 100, 56, "")
+	if res.Codec != "mpeg4" || res.Width != 320 {
+		t.Fatalf("probe said %s %dx%d", res.Codec, res.Width, res.Height)
+	}
+
+	// not media, and media that isn't
+	if _, err := Make(context.Background(), c, filepath.Join(dir, "x.txt"), Opts{}); err != ErrUnsupported {
+		t.Fatalf("a .txt is unsupported, got %v", err)
+	}
+	bad := filepath.Join(dir, "bad.mp4")
+	_ = os.WriteFile(bad, []byte("not a video at all"), 0o644)
+	_, err = Make(context.Background(), c, bad, Opts{})
+	var de *DecodeError
+	if err == nil || !isDecodeErr(err, &de) {
+		t.Fatalf("garbage should be a DecodeError, got %v", err)
+	}
+	// the clock: a cancelled context is not the file's fault
+	ctx, cancel := context.WithTimeout(context.Background(), time.Nanosecond)
+	defer cancel()
+	if _, err := Make(ctx, c, pngPath, Opts{}); err == nil || isDecodeErr(err, &de) {
+		t.Fatalf("a timeout must not read as a decode failure, got %v", err)
+	}
+}
+
+func check(t *testing.T, res Result, w, h int, engine string) {
+	t.Helper()
+	im, err := jpeg.Decode(bytes.NewReader(res.JPEG))
+	if err != nil {
+		t.Fatalf("not a jpeg: %v", err)
+	}
+	if b := im.Bounds(); b.Dx() != w || b.Dy() < h-1 || b.Dy() > h+1 { // the short side rounds either way
+		t.Fatalf("got %dx%d, want %dx%d", b.Dx(), b.Dy(), w, h)
+	}
+	if engine != "" && res.Engine != engine {
+		t.Fatalf("engine %q, want %q", res.Engine, engine)
+	}
+}
+
+func isDecodeErr(err error, de **DecodeError) bool {
+	x, ok := err.(*DecodeError)
+	if ok {
+		*de = x
+	}
+	return ok
+}
@@ -0,0 +1,259 @@
+package metrics
+
+// CPU power, from the RAPL energy counters the kernel keeps under /sys/class/powercap: Intel
+// since Sandy Bridge, and AMD Zen through the same driver. Each counter is a running total in
+// µJ, so power is the difference between two readings over the time between them. Every
+// package is summed (`package-0`, and `package-1` on a two-socket board). The other top-level
+// domains are left out. `psys` claims the whole platform but is only as good as the firmware's
+// calibration, and on one machine here it reads lower than the package inside it. The MMIO
+// copy of a package (`intel-rapl-mmio:0`) measures the same thing again. This is the CPU's own
+// figure, shown beside its clock: cores, built-in graphics and memory controller, not disks,
+// fans or the power supply.
+//
+// The counters are root-only since the PLATYPUS side channel (2020). So, like the GPU client
+// walk, they are read in-process when the daemon is root, and otherwise by a root helper,
+// `hamlab cpu-energy`, started once through sudo or doas and asked over a pipe at every
+// sample: one privilege escalation per daemon, not one a second in the auth log. The helper
+// takes nothing from the daemon but the newline that asks; it finds and reads the counters
+// itself. Without root there is no reading, and nothing is shown.
+
+import (
+	"bufio"
+	"encoding/json"
+	"io"
+	"os"
+	"os/exec"
+	"path/filepath"
+	"regexp"
+	"sort"
+	"strconv"
+	"strings"
+	"sync"
+	"time"
+
+	"hamlab/internal/priv"
+)
+
+const raplRoot = "/sys/class/powercap"
+
+var raplPkgRe = regexp.MustCompile(`^package-\d+$`)
+
+// raplCount is one package's counter at one moment.
+type raplCount struct {
+	Dir string `json:"d"`
+	UJ  uint64 `json:"uj"`
+}
+
+type cpuPowerState struct {
+	probed    bool
+	dirs      []string          // the package domains, found at the first sample
+	max       map[string]uint64 // each counter's range: where it wraps to zero
+	useHelper bool              // the counters are not readable in-process
+	helper    *energyHelper
+	prev      []raplCount
+	prevAt    time.Time
+}
+
+// raplPackages lists the package domains under root, sorted. intel-rapl:0 is a package;
+// intel-rapl:0:0 is a part of one (core, uncore, dram).
+func raplPackages(root string) []string {
+	ents, err := os.ReadDir(root)
+	if err != nil {
+		return nil
+	}
+	var out []string
+	for _, e := range ents {
+		n := e.Name()
+		if !strings.HasPrefix(n, "intel-rapl:") || strings.Count(n, ":") != 1 {
+			continue
+		}
+		if raplPkgRe.MatchString(strings.TrimSpace(readStr(filepath.Join(root, n, "name")))) {
+			out = append(out, n)
+		}
+	}
+	sort.Strings(out)
+	return out
+}
+
+func readRAPL(root string, dirs []string) ([]raplCount, bool) {
+	out := make([]raplCount, 0, len(dirs))
+	for _, d := range dirs {
+		b, err := os.ReadFile(filepath.Join(root, d, "energy_uj"))
+		if err != nil {
+			return nil, false
+		}
+		v, err := strconv.ParseUint(strings.TrimSpace(string(b)), 10, 64)
+		if err != nil {
+			return nil, false
+		}
+		out = append(out, raplCount{d, v})
+	}
+	return out, len(out) > 0
+}
+
+// raplWatts is the power between two readings of the same counters. A counter that wrapped
+// is carried across its range. One that went backwards with no known range, or a set of
+// counters that changed between readings, gives no answer rather than a wrong one.
+func raplWatts(prev, cur []raplCount, max map[string]uint64, dt float64) (float64, bool) {
+	if dt <= 0 || len(prev) == 0 || len(prev) != len(cur) {
+		return 0, false
+	}
+	var uj float64
+	for i := range cur {
+		if cur[i].Dir != prev[i].Dir {
+			return 0, false
+		}
+		if cur[i].UJ >= prev[i].UJ {
+			uj += float64(cur[i].UJ - prev[i].UJ)
+			continue
+		}
+		m := max[cur[i].Dir]
+		if m == 0 || prev[i].UJ > m {
+			return 0, false
+		}
+		uj += float64(m - prev[i].UJ + cur[i].UJ)
+	}
+	return uj / 1e6 / dt, true
+}
+
+// cpuPower is the CPU packages' power since the previous sample, in watts; 0 when this
+// machine has no counters or no way to read them.
+func (c *Collector) cpuPower(now time.Time) float64 {
+	p := &c.power
+	if !p.probed {
+		p.probed = true
+		p.dirs = raplPackages(raplRoot)
+		p.max = map[string]uint64{}
+		for _, d := range p.dirs {
+			if v, ok := readInt(filepath.Join(raplRoot, d, "max_energy_range_uj")); ok && v > 0 {
+				p.max[d] = uint64(v)
+			}
+		}
+	}
+	if len(p.dirs) == 0 {
+		return 0
+	}
+	var cur []raplCount
+	ok := false
+	if !p.useHelper {
+		if cur, ok = readRAPL(raplRoot, p.dirs); !ok && priv.Mode() != "root" && priv.Available() {
+			p.useHelper = true
+		}
+	}
+	if p.useHelper {
+		if p.helper == nil {
+			p.helper = &energyHelper{}
+		}
+		cur, ok = p.helper.read()
+	}
+	if !ok {
+		p.prev = nil
+		return 0
+	}
+	w, good := raplWatts(p.prev, cur, p.max, now.Sub(p.prevAt).Seconds())
+	p.prev, p.prevAt = cur, now
+	if !good {
+		return 0
+	}
+	return round1(w)
+}
+
+// energyHelper is the root child that answers each newline with the package counters, one
+// JSON line. The same shape as the GPU client walk's helper, kept separate from it.
+type energyHelper struct {
+	mu       sync.Mutex
+	cmd      *exec.Cmd
+	in       io.WriteCloser
+	out      *bufio.Reader
+	failedAt time.Time
+}
+
+func (h *energyHelper) read() ([]raplCount, bool) {
+	h.mu.Lock()
+	defer h.mu.Unlock()
+	if h.cmd == nil {
+		if !h.failedAt.IsZero() && time.Since(h.failedAt) < helperRetry {
+			return nil, false
+		}
+		if !h.start() {
+			h.failedAt = time.Now()
+			return nil, false
+		}
+	}
+	// a stuck child must not stall the sampler: it is killed, and tried again later
+	cmd := h.cmd
+	stop := time.AfterFunc(5*time.Second, func() { cmd.Process.Kill() })
+	defer stop.Stop()
+	if _, err := io.WriteString(h.in, "\n"); err != nil {
+		h.fail()
+		return nil, false
+	}
+	line, err := h.out.ReadBytes('\n')
+	if err != nil {
+		h.fail()
+		return nil, false
+	}
+	var cs []raplCount
+	if json.Unmarshal(line, &cs) != nil {
+		h.fail()
+		return nil, false
+	}
+	return cs, len(cs) > 0
+}
+
+func (h *energyHelper) start() bool {
+	self, err := os.Executable()
+	if err != nil {
+		return false
+	}
+	full := priv.Wrap(self, "cpu-energy")
+	cmd := exec.Command(full[0], full[1:]...)
+	in, err := cmd.StdinPipe()
+	if err != nil {
+		return false
+	}
+	out, err := cmd.StdoutPipe()
+	if err != nil {
+		return false
+	}
+	if err := cmd.Start(); err != nil {
+		return false
+	}
+	h.cmd, h.in, h.out = cmd, in, bufio.NewReader(out)
+	return true
+}
+
+func (h *energyHelper) fail() {
+	if h.cmd != nil {
+		h.in.Close()
+		h.cmd.Process.Kill()
+		go h.cmd.Wait()
+	}
+	h.cmd, h.in, h.out = nil, nil, nil
+	h.failedAt = time.Now()
+}
+
+// CPUEnergyHelper is `hamlab cpu-energy`: for every line read on stdin, one JSON line of the
+// package counters on stdout. Ends when stdin does — when the daemon that started it has gone.
+func CPUEnergyHelper(stdin io.Reader, stdout io.Writer) int {
+	return cpuEnergyHelper(raplRoot, stdin, stdout)
+}
+
+func cpuEnergyHelper(root string, stdin io.Reader, stdout io.Writer) int {
+	dirs := raplPackages(root)
+	sc := bufio.NewScanner(stdin)
+	w := bufio.NewWriter(stdout)
+	for sc.Scan() {
+		cs, ok := readRAPL(root, dirs)
+		if !ok {
+			cs = []raplCount{}
+		}
+		b, _ := json.Marshal(cs)
+		w.Write(b)
+		w.WriteByte('\n')
+		if w.Flush() != nil {
+			return 1
+		}
+	}
+	return 0
+}
@@ -0,0 +1,106 @@
+package metrics
+
+import (
+	"bytes"
+	"encoding/json"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+)
+
+// A fake /sys/class/powercap: a package with its parts, the platform domain, and the MMIO
+// copy of the same package. Only the package counts.
+func fakeRAPL(t *testing.T, domains map[string][2]string) string {
+	t.Helper()
+	root := t.TempDir()
+	for dir, v := range domains {
+		d := filepath.Join(root, dir)
+		if err := os.MkdirAll(d, 0o755); err != nil {
+			t.Fatal(err)
+		}
+		os.WriteFile(filepath.Join(d, "name"), []byte(v[0]+"\n"), 0o644)
+		os.WriteFile(filepath.Join(d, "energy_uj"), []byte(v[1]+"\n"), 0o644)
+	}
+	return root
+}
+
+func TestRAPLPackagesOnlyCountsPackages(t *testing.T) {
+	root := fakeRAPL(t, map[string][2]string{
+		"intel-rapl:0":      {"package-0", "1000"},
+		"intel-rapl:0:0":    {"core", "600"},
+		"intel-rapl:0:1":    {"uncore", "10"},
+		"intel-rapl:1":      {"psys", "300"},
+		"intel-rapl-mmio:0": {"package-0", "1000"},
+	})
+	if got := raplPackages(root); len(got) != 1 || got[0] != "intel-rapl:0" {
+		t.Fatalf("packages = %v, want [intel-rapl:0]", got)
+	}
+
+	two := fakeRAPL(t, map[string][2]string{"intel-rapl:0": {"package-0", "5"}, "intel-rapl:1": {"package-1", "7"}})
+	got := raplPackages(two)
+	if strings.Join(got, ",") != "intel-rapl:0,intel-rapl:1" {
+		t.Fatalf("two sockets: packages = %v", got)
+	}
+	cs, ok := readRAPL(two, got)
+	if !ok || len(cs) != 2 || cs[0].UJ != 5 || cs[1].UJ != 7 {
+		t.Fatalf("readRAPL = %+v, %v", cs, ok)
+	}
+	if got := raplPackages(filepath.Join(two, "nope")); len(got) != 0 {
+		t.Fatalf("no powercap: packages = %v, want none", got)
+	}
+}
+
+func TestRAPLWatts(t *testing.T) {
+	c := func(d string, uj uint64) raplCount { return raplCount{d, uj} }
+	max := map[string]uint64{"intel-rapl:0": 1_000_000_000}
+	cases := []struct {
+		name      string
+		prev, cur []raplCount
+		dt        float64
+		want      float64
+		ok        bool
+	}{
+		{"steady", []raplCount{c("intel-rapl:0", 0)}, []raplCount{c("intel-rapl:0", 10_000_000)}, 2, 5, true},
+		{"two packages add", []raplCount{c("intel-rapl:0", 0), c("intel-rapl:1", 0)}, []raplCount{c("intel-rapl:0", 4_000_000), c("intel-rapl:1", 6_000_000)}, 1, 10, true},
+		{"wrapped", []raplCount{c("intel-rapl:0", 999_000_000)}, []raplCount{c("intel-rapl:0", 1_000_000)}, 1, 2, true},
+		{"backwards, range unknown", []raplCount{c("intel-rapl:1", 5_000_000)}, []raplCount{c("intel-rapl:1", 1)}, 1, 0, false},
+		{"counters changed", []raplCount{c("intel-rapl:0", 0)}, []raplCount{c("intel-rapl:1", 9)}, 1, 0, false},
+		{"first reading", nil, []raplCount{c("intel-rapl:0", 9)}, 1, 0, false},
+		{"no time passed", []raplCount{c("intel-rapl:0", 0)}, []raplCount{c("intel-rapl:0", 9)}, 0, 0, false},
+	}
+	for _, tc := range cases {
+		got, ok := raplWatts(tc.prev, tc.cur, max, tc.dt)
+		if ok != tc.ok || (ok && (got < tc.want-1e-9 || got > tc.want+1e-9)) {
+			t.Errorf("%s: got %v, %v; want %v, %v", tc.name, got, ok, tc.want, tc.ok)
+		}
+	}
+}
+
+// The helper answers every newline with the counters it found itself, and stops at EOF.
+func TestCPUEnergyHelper(t *testing.T) {
+	root := fakeRAPL(t, map[string][2]string{"intel-rapl:0": {"package-0", "42"}, "intel-rapl:0:0": {"core", "7"}})
+	var out bytes.Buffer
+	if code := cpuEnergyHelper(root, strings.NewReader("\n\n"), &out); code != 0 {
+		t.Fatalf("exit %d", code)
+	}
+	lines := strings.Split(strings.TrimSpace(out.String()), "\n")
+	if len(lines) != 2 {
+		t.Fatalf("got %d lines, want 2: %q", len(lines), out.String())
+	}
+	var cs []raplCount
+	if err := json.Unmarshal([]byte(lines[1]), &cs); err != nil || len(cs) != 1 || cs[0] != (raplCount{"intel-rapl:0", 42}) {
+		t.Fatalf("line = %s (%v)", lines[1], err)
+	}
+}
+
+// History keeps the average of the samples that had a reading.
+func TestFoldCPUPower(t *testing.T) {
+	b := []Sample{{T: 1, CPUPower: 4}, {T: 2}, {T: 3, CPUPower: 8}}
+	if got := fold(b).CPUPower; got != 6 {
+		t.Fatalf("folded CPU power = %v, want 6", got)
+	}
+	if got := fold([]Sample{{T: 1}, {T: 2}}).CPUPower; got != 0 {
+		t.Fatalf("no readings folded to %v, want 0", got)
+	}
+}
@@ -32,6 +32,17 @@ func fold(b []Sample) Sample {
 		return t / uint64(len(b))
 	}
 	out.CPU = sum(func(s Sample) float64 { return s.CPU })
+	// CPU power: over the samples that have a reading, so a helper restart is not a dip to zero
+	var pw, pn float64
+	for _, s := range b {
+		if s.CPUPower > 0 {
+			pw, pn = pw+s.CPUPower, pn+1
+		}
+	}
+	out.CPUPower = 0
+	if pn > 0 {
+		out.CPUPower = round1(pw / pn)
+	}
 	out.Load[0] = sum(func(s Sample) float64 { return s.Load[0] })
 	out.Load[1] = sum(func(s Sample) float64 { return s.Load[1] })
 	out.Load[2] = sum(func(s Sample) float64 { return s.Load[2] })
@@ -250,6 +250,31 @@ func listGPUs(known []*gpuDev) []*gpuDev {
 	return out
 }

+// RenderNodeName is the GPU behind a render node ("/dev/dri/renderD128" → "Intel Arc A380"),
+// named the same way the Processes tab names it; "" when sysfs has nothing for it.
+func RenderNodeName(node string) string {
+	dev, err := filepath.EvalSymlinks("/sys/class/drm/" + filepath.Base(node) + "/device")
+	if err != nil {
+		return ""
+	}
+	driver := ueventValue(dev+"/uevent", "DRIVER")
+	if driver == "" {
+		driver = filepath.Base(readLink(dev + "/driver"))
+	}
+	return gpuName(dev, ueventValue(dev+"/uevent", "PCI_SLOT_NAME"), driver)
+}
+
+// RenderNodeIntegrated reports a render node whose GPU sits on the CPU die (PCI root bus 0,
+// or no PCI bus at all), as opposed to a card on the bus.
+func RenderNodeIntegrated(node string) bool {
+	dev, err := filepath.EvalSymlinks("/sys/class/drm/" + filepath.Base(node) + "/device")
+	if err != nil {
+		return true
+	}
+	pci := ueventValue(dev+"/uevent", "PCI_SLOT_NAME")
+	return pci == "" || strings.HasPrefix(pci, "0000:00:")
+}
+
 var gpuVendors = map[string]string{"0x8086": "Intel", "0x1002": "AMD", "0x10de": "NVIDIA", "0x1af4": "Virtio", "0x106b": "Apple"}

 var (
@@ -6,7 +6,9 @@
 // lm-sensors, smartmontools or root. Sections whose source is absent (no fans, no
 // UPS daemon, no hwmon at all on a VM) simply come back empty rather than failing.
 // The only external commands are optional UPS daemons: pwrstat (CyberPower), upsc
-// (NUT) and apcaccess (apcupsd), tried in that order.
+// (NUT) and apcaccess (apcupsd), tried in that order. Two readings are root-only, the GPU
+// client walk and the CPU energy counters; without root they come from small helpers of
+// this binary started once through sudo or doas (gpu.go, cpupower.go), or not at all.
 package metrics

 import (
@@ -137,6 +139,7 @@ type Sample struct {
 	Interval int64      `json:"interval_ms"` // sampling interval in effect
 	CPU      float64    `json:"cpu"`
 	Cores    []float64  `json:"cores"`
+	CPUPower float64    `json:"cpu_power_w,omitempty"` // the CPU packages' own energy counters; 0 = no reading
 	Load     [3]float64 `json:"load"`
 	Mem      Mem        `json:"mem"`
 	Swap     Mem        `json:"swap"`
@@ -177,6 +180,7 @@ type Collector struct {
 	lastTable *ProcTable
 	upsProbe  func() *UPS // nil when no UPS daemon is installed
 	gpu       gpuState
+	power     cpuPowerState
 	prevARC   arcPrev

 	subMu sync.Mutex
@@ -343,6 +347,7 @@ func (c *Collector) sample() {

 	s := Sample{T: now.UnixMilli(), Interval: c.Interval().Milliseconds(), Temps: []Temp{}, Fans: []Fan{}, Net: []Net{}, Disks: []Disk{}}
 	s.CPU, s.Cores = c.cpu()
+	s.CPUPower = c.cpuPower(now)
 	s.Load = loadavg()
 	s.Mem, s.Swap = meminfo()
 	s.Uptime = uptime()
@@ -1113,6 +1118,7 @@ type ProcTable struct {
 	CPUModel  string     `json:"cpu_model,omitempty"`
 	CPUMHz    float64    `json:"cpu_mhz,omitempty"`
 	CPUMaxMHz float64    `json:"cpu_max_mhz,omitempty"`
+	CPUPowerW float64    `json:"cpu_power_w,omitempty"`
 	CPUTemp   float64    `json:"cpu_temp,omitempty"`
 	CoreIDs   []int      `json:"core_ids,omitempty"` // for each logical CPU, the physical core it is a thread of (what the temperature sensors are named by)
 	Load      [3]float64 `json:"load"`
@@ -1312,7 +1318,7 @@ func (c *Collector) Processes() ProcTable {
 	t.Mem, t.Swap = meminfo()
 	if n := len(c.ring); n > 0 {
 		last := c.ring[n-1]
-		t.CPU, t.Cores, t.Net, t.CPUTemp = last.CPU, last.Cores, last.Net, cpuTemp(last.Temps)
+		t.CPU, t.Cores, t.Net, t.CPUTemp, t.CPUPowerW = last.CPU, last.Cores, last.Net, cpuTemp(last.Temps), last.CPUPower
 		t.CoreIDs = coreIDs(len(last.Cores))
 		from := n - 90
 		if from < 0 {
@@ -62,6 +62,9 @@ func flatten(s Sample, want func(id string) bool) []sensors.Sensor {
 	if c := cpuTemp(s.Temps); c > 0 {
 		f.add("cpu.temp", "CPU temperature", "temperature", "°C", c, t, none)
 	}
+	if s.CPUPower > 0 {
+		f.add("cpu.power", "CPU power", "power", "W", s.CPUPower, t, none)
+	}
 	for i, w := range []string{"1", "5", "15"} {
 		f.add("load."+w, "Load "+w+" min", "load", "", s.Load[i], t, none)
 	}
@@ -66,7 +66,6 @@ type Policy struct {
 	KeepMin int    `json:"keep_min"`
 	Prefix  string `json:"prefix"`
 	Enabled bool   `json:"enabled"`
-
 }

 func (p *Policy) prefix() string { return strings.TrimSpace(p.Prefix) }
@@ -146,7 +146,7 @@ func (m *Manager) prune() {
 	}
 	var finished []*Task
 	for _, t := range m.tasks {
-		if !t.Running {
+		if !t.running() {
 			finished = append(finished, t)
 		}
 	}
@@ -184,13 +184,20 @@ func (m *Manager) RunningOf(kind string) (*Task, bool) {
 	m.mu.Lock()
 	defer m.mu.Unlock()
 	for _, t := range m.tasks {
-		if t.Kind == kind && t.Running {
+		if t.Kind == kind && t.running() {
 			return t, true
 		}
 	}
 	return nil, false
 }

+// running reads the flag the waiter goroutine clears, under the task's own lock.
+func (t *Task) running() bool {
+	t.mu.Lock()
+	defer t.mu.Unlock()
+	return t.Running
+}
+
 func (t *Task) Snapshot(withOutput bool) Snapshot {
 	t.mu.Lock()
 	defer t.mu.Unlock()
@@ -64,6 +64,9 @@ func New(sudo bool, tm *tasks.Manager) *Manager {
 	return m
 }

+// PM is the package manager found: apt | dnf | zypper | pacman | apk, or "".
+func (m *Manager) PM() string { return m.pm }
+
 func (m *Manager) sudoArgs(args ...string) []string {
 	if m.sudo {
 		return priv.Wrap(args...)
@@ -11,6 +11,7 @@
        "@xterm/addon-fit": "^0.10.0",
        "@xterm/addon-web-links": "^0.11.0",
        "@xterm/xterm": "^5.5.0",
+        "hls.js": "^1.7.3",
        "qrcode-generator": "^2.0.4",
        "react": "^18.3.1",
        "react-dom": "^18.3.1"
@@ -1426,6 +1427,12 @@
        "node": ">=6.9.0"
      }
    },
+    "node_modules/hls.js": {
+      "version": "1.7.3",
+      "resolved": "https://registry.npmjs.org/hls.js/-/hls.js-1.7.3.tgz",
+      "integrity": "sha512-MsPlx6yVW4Qv4C7mEVou4/gk/5cN2dVxOTnrNjPSmyH2f0Ln+/UkG10Ax1PE6OvrmTVPKgQYozTtBaPOuCzq7A==",
+      "license": "Apache-2.0"
+    },
    "node_modules/js-tokens": {
      "version": "4.0.0",
      "resolved": "https://registry.npmjs.org/js-tokens/-/js-tokens-4.0.0.tgz",
@@ -7,12 +7,13 @@
    "dev": "vite",
    "build": "tsc --noEmit && vite build",
    "icons": "node scripts/icons.mjs",
-    "test": "node scripts/test-graphcols.mjs"
+    "test": "node scripts/test-graphcols.mjs && node scripts/test-css-imports.mjs && node scripts/test-resolve-path.mjs"
  },
  "dependencies": {
    "@xterm/addon-fit": "^0.10.0",
    "@xterm/addon-web-links": "^0.11.0",
    "@xterm/xterm": "^5.5.0",
+    "hls.js": "^1.7.3",
    "qrcode-generator": "^2.0.4",
    "react": "^18.3.1",
    "react-dom": "^18.3.1"
@@ -0,0 +1,20 @@
+// node scripts/test-css-imports.mjs — every stylesheet the UI imports is one somebody has read.
+// A third-party stylesheet usually carries its demo page's global rules (body, *, button); on
+// 2026-10-09 one restyled every button in the app. Add a file here only once its rules are
+// known to touch nothing but its own component.
+import { readdirSync, readFileSync, statSync } from 'node:fs'
+import { join, relative } from 'node:path'
+
+const allowed = new Set(['./styles.css', '@xterm/xterm/css/xterm.css'])
+const src = new URL('../src', import.meta.url).pathname
+const files = []
+const walk = (d) => { for (const n of readdirSync(d)) { const p = join(d, n); if (statSync(p).isDirectory()) { if (n !== 'vendor') walk(p) } else if (/\.(ts|tsx)$/.test(n)) files.push(p) } }
+walk(src)
+const fails = []
+for (const f of files) {
+  for (const m of readFileSync(f, 'utf8').matchAll(/import\s+(?:[^'"]*from\s+)?['"]([^'"]+\.css)['"]/g)) {
+    if (!allowed.has(m[1])) fails.push(`${relative(src, f)} imports ${m[1]}`)
+  }
+}
+if (fails.length) { console.error('css imports: not allowed:\n  ' + fails.join('\n  ')); process.exit(1) }
+console.log(`css imports: ok (${files.length} files)`)
@@ -0,0 +1,16 @@
+// node scripts/test-resolve-path.mjs — the path box resolves like a shell: relative to here,
+// . and .. applied, trailing slashes dropped, never anything but an absolute path.
+import { readFileSync } from 'node:fs'
+const src = readFileSync(new URL('../src/Files.tsx', import.meta.url), 'utf8')
+const m = src.match(/export function resolvePath[\s\S]*?\n}\n/)
+if (!m) { console.error('resolvePath not found'); process.exit(1) }
+const resolvePath = new Function(m[0].replace('export function', 'return function').replace(/: string\[\]/g, '').replace(/: string/g, '') + ' ')()
+const cases = [
+  ['/tank/media', '/x', '/tank/media'], ['/tank/media/', '/x', '/tank/media'], ['', '/here', '/here'], ['   ', '/here', '/here'],
+  ['sub', '/here', '/here/sub'], ['./sub/', '/here', '/here/sub'], ['..', '/a/b', '/a'], ['../..', '/a/b', '/'], ['../../..', '/a', '/'],
+  ['/', '/a', '/'], ['a//b', '/', '/a/b'], ['/tank/./x/../y', '/', '/tank/y'], ['sp ace #1', '/d', '/d/sp ace #1'],
+]
+let bad = 0
+for (const [input, here, want] of cases) { const got = resolvePath(input, here); if (got !== want) { bad++; console.error(`resolvePath(${JSON.stringify(input)}, ${here}) = ${got}, want ${want}`) } }
+if (bad) process.exit(1)
+console.log(`resolve path: ok (${cases.length} cases)`)
@@ -355,7 +355,7 @@ function StackDetail({ name, startTask, onBack, onChanged, onDuplicate }: { name
    <div className="svc-detail">
      <CloseBtn onClick={onBack} />
      <div className="svc-head"><button className="btn back" onClick={onBack}>‹ Back</button><span className={'sdot ' + (st.containers.length === 0 ? '' : st.running === st.containers.length ? 'ok' : st.running ? 'warn' : 'bad')} /><span className="dname">{st.name}</span><span className="muted small">{st.running}/{st.containers.length} running</span></div>
-      <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{file === 'env' ? (st.host_file.replace(/[^/]+$/, '') + '.env') : (st.host_files?.[file] ?? st.host_file)}{st.held_by && <span className="muted"> · kept on <b>{st.held_by}</b>, deployed to this machine over {st.remote}</span>}{st.via && <span className="muted"> · compose runs inside <b>{st.via}</b>, as it was deployed</span>}{st.has_env && ' · has a .env beside it'}</div>
+      <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{file === 'env' ? (st.host_file.replace(/[^/]+$/, '') + '.env') : (st.host_files?.[file] ?? st.host_file)}{st.via && <span className="muted"> · compose runs inside <b>{st.via}</b>, as it was deployed</span>}{st.has_env && ' · has a .env beside it'}</div>
      {((st.host_files?.length ?? 0) > 1 || st.has_env) && <div className="chips" title="this stack is deployed from several files, in this order; Deploy uses all of them">{st.host_files!.map((f, i) => <button key={f} className={'chip' + (i === file ? ' on' : '')} onClick={async () => { if (dirty && !(await askYes('Discard unsaved changes to this file?', 'Discard'))) return; setFile(i) }}>{f.split('/').pop()}</button>)}{st.has_env && <button className={'chip' + (file === 'env' ? ' on' : '')} title="the .env beside the compose file: variables compose substitutes" onClick={async () => { if (dirty && !(await askYes('Discard unsaved changes to this file?', 'Discard'))) return; setFile('env') }}>.env</button>}</div>}
      {file === 'env' && !reveal ? <div className="env-masked"><pre className="editor stack-editor">{maskEnv(text)}</pre><button className="btn" onClick={() => setReveal(true)}>Reveal and edit</button></div> :
      <CodeEditor className="stack-editor" language={file === 'env' ? 'env' : 'yaml'} value={text} onChange={setText} />}
@@ -447,7 +447,7 @@ export default function Docker() {
          {shownTab === 'stacks' && (stacks ?? []).map((st) => (
            <div key={st.name} className={'svc-row' + (st.name === selStack ? ' active' : '')} onClick={() => st.editable ? setSel('stack:' + st.name) : toast(st.note ?? 'not editable here', 'info')}>
              <span className={'sdot ' + (st.containers.length === 0 ? '' : st.running === st.containers.length ? 'ok' : st.running ? 'warn' : 'bad')} />
-              <div className="svc-name"><div className="n">{st.name}</div><div className="d">{st.editable ? (st.held_by ? `on ${st.held_by}: ` : '') + st.host_file : st.note}</div></div>
+              <div className="svc-name"><div className="n">{st.name}</div><div className="d">{st.editable ? st.host_file : st.note}</div></div>
              <div className="svc-state">{st.containers.length === 0 ? 'not deployed' : `${st.running}/${st.containers.length}`}{!st.editable && <><br />read-only</>}</div>
            </div>
          ))}
@@ -1,10 +1,25 @@
-import { DragEvent, useCallback, useEffect, useRef, useState } from 'react'
-import { api, FileEntry, FileInfo } from './api'
+import { DragEvent, useCallback, useEffect, useMemo, useRef, useState } from 'react'
+import { api, FileEntry, FileInfo, TaskInfo, ThumbStatus } from './api'
 import { fmtBytes } from './fmt'
 import { Btn, Loading, Spinner, askText, askYes, setUnsaved, toast, useEscape } from './ui'
 import { useHashSel } from './hashsel'
+import TaskOutput from './TaskOutput'
+import Player from './Player'

 const join = (dir: string, name: string) => (dir === '/' ? '/' + name : dir + '/' + name)
+// A typed path, made absolute: relative to the folder being looked at, "." and ".." applied,
+// trailing slashes dropped — what a shell would make of it.
+export function resolvePath(input: string, here: string): string {
+  const raw = input.trim()
+  if (!raw) return here
+  const parts = (raw.startsWith('/') ? [] : here.split('/')).concat(raw.split('/'))
+  const out: string[] = []
+  for (const p of parts) {
+    if (p === '' || p === '.') continue
+    if (p === '..') out.pop(); else out.push(p)
+  }
+  return '/' + out.join('/')
+}
 const fmtTime = (ms: number) => { const d = new Date(ms); const now = new Date(); return d.toDateString() === now.toDateString() ? d.toLocaleTimeString([], { hour: '2-digit', minute: '2-digit' }) : d.toLocaleDateString(undefined, { year: d.getFullYear() === now.getFullYear() ? undefined : 'numeric', month: 'short', day: '2-digit' }) }
 const isImage = (n: string) => /\.(png|jpe?g|gif|webp|svg|bmp|ico|avif)$/i.test(n)
 const shellQuote = (s: string) => "'" + s.replace(/'/g, "'\\''") + "'"
@@ -14,7 +29,9 @@ function icon(e: FileEntry): string {
  if (e.type === 'dir') return e.target ? '🔗' : '📁'
  if (e.type === 'link') return e.broken ? '⛓️‍💥' : '🔗'
  if (e.type === 'other') return '⚙️'
-  if (isImage(e.name)) return '🖼️'
+  if (e.preview === 'image' || isImage(e.name)) return '🖼️'
+  if (e.preview === 'video') return '🎞️'
+  if (e.preview === 'audio') return '🎵'
  if (/\.(zip|gz|bz2|xz|zst|tar|tgz|7z|rar)$/i.test(e.name)) return '🗜️'
  if (/\.(sh|bash|zsh|py|go|js|ts|tsx|rb|pl|php|rs|c|h|cpp|java|lua)$/i.test(e.name) || e.mode.includes('x')) return '📜'
  if (/\.(log|txt|md|json|ya?ml|toml|ini|conf|cfg|env|service|timer)$/i.test(e.name)) return '📄'
@@ -22,6 +39,163 @@ function icon(e: FileEntry): string {
 }

 type Sort = 'name' | 'size' | 'mtime'
+const PREVIEWS_KEY = 'hamlab.files.previews'
+const byName = (a: FileEntry, b: FileEntry) => a.name.localeCompare(b.name, undefined, { numeric: true, sensitivity: 'base' })
+// A name is one path segment. ("../x" and "a/b" would quietly act somewhere else.)
+const okName = (n?: string | null): n is string => { const t = n?.trim(); if (!t) return false; if (t.includes('/') || t === '.' || t === '..') { toast('a name can\'t contain / or be . or .. — use Move… to put it elsewhere', 'err'); return false } return true }
+
+// ---- move: walk to the destination, then "Move here" ----
+function MovePicker({ item, from, sudo, hidden, onClose, onMoved }: { item: FileEntry; from: string; sudo: boolean; hidden: boolean; onClose: () => void; onMoved: (task?: TaskInfo) => void }) {
+  const src = join(from, item.name)
+  const isFolder = item.type === 'dir' && !item.target
+  const [hist, setHist] = useState<string[]>([from]) // where the picker has been, for back and forward
+  const [at, setAt] = useState(0)
+  const dir = hist[at]
+  const [entries, setEntries] = useState<FileEntry[] | null>(null)
+  const [err, setErr] = useState('')
+  const [pathInput, setPathInput] = useState(from)
+  const [busy, setBusy] = useState(false)
+  const load = useCallback(async (p: string) => {
+    setEntries(null); setErr('')
+    try { const l = await api.files(p, sudo); setEntries(l.entries) } catch (e) { setErr(e instanceof Error ? e.message : 'failed'); setEntries([]) }
+  }, [sudo])
+  useEffect(() => { setPathInput(dir); load(dir) }, [dir, load])
+  useEscape(onClose)
+  const go = (input: string) => {
+    const p = resolvePath(input, dir)
+    if (p === dir) return
+    setHist((h) => [...h.slice(0, at + 1), p]); setAt(at + 1)
+  }
+  const up = () => { if (dir !== '/') go(dir.slice(0, dir.lastIndexOf('/')) || '/') }
+  const folders = (entries ?? []).filter((e) => e.type === 'dir' && (hidden || !e.name.startsWith('.'))).sort(byName)
+  const crumbs = dir === '/' ? [] : dir.slice(1).split('/')
+  const dest = join(dir, item.name)
+  const why = dir === from ? 'it is already here'
+    : isFolder && (dir === src || dir.startsWith(src + '/')) ? 'a folder can\'t move into itself'
+    : (entries ?? []).some((e) => e.name === item.name) ? `something called ${item.name} is already there` : ''
+  const move = async () => {
+    setBusy(true)
+    try {
+      const t = await api.fileMove(src, dest, sudo)
+      if (t) toast(`${dir} is on another filesystem — copying ${item.name} there, then removing it here`, 'info')
+      else toast(`moved ${item.name} to ${dir}`)
+      onMoved(t)
+    } catch (e) { toast(`move — ${e instanceof Error ? e.message : 'failed'}`, 'err'); setBusy(false) }
+  }
+  const mkdir = async () => {
+    const n = await askText('New folder name')
+    if (!okName(n)) return
+    try { await api.fileMkdir(join(dir, n.trim()), sudo); go(join(dir, n.trim())) } catch (e) { toast(`create folder — ${e instanceof Error ? e.message : 'failed'}`, 'err') }
+  }
+  return (
+    <div className="modal-back" onClick={onClose}>
+      <div className="modal mover" onClick={(e) => e.stopPropagation()}>
+        <h3>Move {isFolder ? 'folder ' : ''}<span className="mono">{item.name}</span></h3>
+        <div className="mover-nav">
+          <button className="icon-btn" title="back" disabled={at === 0} onClick={() => setAt(at - 1)}>‹</button>
+          <button className="icon-btn" title="forward" disabled={at >= hist.length - 1} onClick={() => setAt(at + 1)}>›</button>
+          <button className="icon-btn" title="up one level" disabled={dir === '/'} onClick={up}>↑</button>
+          <form className="crumbs" onSubmit={(e) => { e.preventDefault(); go(pathInput) }}>
+            <button type="button" className="crumb" onClick={() => go('/')}>/</button>
+            {crumbs.map((c, i) => <button type="button" key={i} className="crumb" onClick={() => go('/' + crumbs.slice(0, i + 1).join('/'))}>{c}</button>)}
+            <input className="path-input" value={pathInput} onChange={(e) => setPathInput(e.target.value)} onBlur={() => setPathInput(dir)} spellCheck={false} autoCapitalize="off" autoCorrect="off" />
+          </form>
+        </div>
+        <div className="mover-list">
+          {entries === null && <Loading label="Listing…" />}
+          {err && <div className="error" style={{ margin: 10 }}>{err}</div>}
+          {folders.map((e) => {
+            const self = dir === from && e.name === item.name
+            return (
+              <div key={e.name} className={'mover-row' + (self ? ' self' : '')} onClick={() => { if (!self) go(join(dir, e.name)) }}>
+                <span className="ficon">{e.target ? '🔗' : '📁'}</span>
+                <span className="fname">{e.name}</span>
+                {self && <span className="muted small">this is what's moving</span>}
+              </div>
+            )
+          })}
+          {entries !== null && folders.length === 0 && !err && <div className="muted small" style={{ padding: 12 }}>No folders here — “Move here” puts it in this one.</div>}
+        </div>
+        <div className="modal-foot">
+          <div className="svc-actions">
+            <button className="btn" onClick={mkdir}>+ folder</button>
+            <span className="spacer" />
+            <button className="btn" onClick={onClose}>Cancel</button>
+            <Btn className="btn on" disabled={!!why || entries === null} busy={busy} onClick={move}>Move here</Btn>
+          </div>
+          <div className="muted small mono mover-dest">{why || `→ ${dest}`}</div>
+        </div>
+      </div>
+    </div>
+  )
+}
+
+// ---- previews ----
+
+// Rows ask for their thumbnail only as they scroll near: a browser's own lazy loading
+// watches the window, and this list scrolls inside a box of its own. One observer for the
+// list, a callback per row, each fired once.
+class Near {
+  private obs: IntersectionObserver
+  private cbs = new Map<Element, () => void>()
+  constructor(root: Element) {
+    this.obs = new IntersectionObserver((ents) => {
+      for (const e of ents) if (e.isIntersecting) { const cb = this.cbs.get(e.target); if (cb) { this.forget(e.target); cb() } }
+    }, { root, rootMargin: '400px 0px' })
+  }
+  watch(el: Element, cb: () => void) { this.cbs.set(el, cb); this.obs.observe(el); return () => this.forget(el) }
+  private forget(el: Element) { this.cbs.delete(el); this.obs.unobserve(el) }
+}
+
+function Thumb({ url, kind, near, fallback }: { url: string; kind: 'image' | 'video' | 'audio'; near: Near | null; fallback: string }) {
+  const ref = useRef<HTMLSpanElement>(null)
+  const [show, setShow] = useState(false)
+  const [failed, setFailed] = useState('')
+  useEffect(() => { const el = ref.current; if (!el || !near || show) return; return near.watch(el, () => setShow(true)) }, [near, show])
+  useEffect(() => { setFailed('') }, [url]) // a changed file is a new URL, and worth another try
+  const broken = failed === url
+  return (
+    <span ref={ref} className={'fthumb ' + kind} title={broken ? 'no preview for this file' : undefined}>
+      {show && !broken && <img src={url} alt="" decoding="async" onError={() => setFailed(url)} />}
+      {(!show || broken) && <span className="ficon">{fallback}</span>}
+    </span>
+  )
+}
+
+// What the previews button says about how they get made here, and the one-tap fixes.
+function ThumbNote({ st, sudo, onChanged }: { st: ThumbStatus | null; sudo: boolean; onChanged: () => void }) {
+  const [task, setTask] = useState<{ id: string; restart: boolean } | null>(null)
+  const [waiting, setWaiting] = useState(false)
+  // the GPU fix ends by restarting Ham Lab: poll until it answers again, then re-read the status
+  useEffect(() => {
+    if (!waiting) return
+    const t = setInterval(async () => { try { await api.thumbStatus(sudo, true); setWaiting(false); onChanged() } catch { /* restarting */ } }, 3000)
+    return () => clearInterval(t)
+  }, [waiting, sudo, onChanged])
+  if (!st) return null
+  const blocked = (st.unusable ?? []).filter((g) => g.permission)
+  const start = async (label: string, fn: () => Promise<{ id: string }>, restart: boolean) => {
+    try { const t = await fn(); setTask({ id: t.id, restart }) } catch (e) { toast(`${label} — ${e instanceof Error ? e.message : 'failed'}`, 'err') }
+  }
+  return (
+    <>
+      {!st.ok && (
+        <div className="thumb-note notice">
+          <span>Previews need ffmpeg: {st.error || 'it is not installed on this machine'}.</span>
+          {st.install && !task && <Btn className="btn on" onClick={() => start('install', api.thumbInstall, false)}>Install ffmpeg with {st.install.pm}</Btn>}
+        </div>
+      )}
+      {st.ok && blocked.length > 0 && (
+        <div className="thumb-note notice">
+          <span>{blocked.map((g) => g.name || g.device).join(', ')} is here, but Ham Lab runs as {st.user} and can't open {blocked.length > 1 ? 'them' : 'it'} ({blocked[0].reason}). Previews of videos are on the CPU until it can.</span>
+          {st.gpu_fix && !task && !waiting && <Btn className="btn on" confirm="Ham Lab adds itself to the GPU's group and restarts. Open terminals are interrupted. Continue?" onClick={() => start('GPU access', api.thumbGPUAccess, true)}>Allow GPU access</Btn>}
+          {waiting && <span className="muted small"><Spinner /> Ham Lab is restarting; the page reconnects by itself.</span>}
+        </div>
+      )}
+      {task && <TaskOutput id={task.id} onDone={(t) => { const ok = t.exit_code === 0 && !t.error; if (ok && task.restart) setWaiting(true); else if (ok) onChanged(); else toast('failed — the output says where', 'err'); setTask(null) }} />}
+    </>
+  )
+}

 // ---- editor / viewer ----
 function Viewer({ path, sudo, onClose, onChanged }: { path: string; sudo: boolean; onClose: () => void; onChanged: () => void }) {
@@ -30,11 +204,12 @@ function Viewer({ path, sudo, onClose, onChanged }: { path: string; sudo: boolea
  const [orig, setOrig] = useState('')
  const [err, setErr] = useState('')
  const [saving, setSaving] = useState(false)
+  const [cantPlay, setCantPlay] = useState(false) // the browser tried the file as it is and gave up
  const name = path.split('/').pop() ?? path
  const dirty = text !== null && text !== orig

  useEffect(() => {
-    setInfo(null); setText(null); setErr('')
+    setInfo(null); setText(null); setErr(''); setCantPlay(false)
    let stop = false
    ;(async () => {
      try {
@@ -92,8 +267,16 @@ function Viewer({ path, sudo, onClose, onChanged }: { path: string; sudo: boolea
        <textarea className="editor file-editor" value={text} spellCheck={false} onChange={(e) => setText(e.target.value)} />
      )}
      {info && text === null && isImage(name) && <div className="preview"><img src={api.fileReadURL(path, sudo)} alt={name} /></div>}
-      {info && text === null && !isImage(name) && !err && (
-        <div className="notice">{info.type === 'dir' ? 'This is a directory.' : info.size > MAX_EDIT ? `Too large to edit here (${fmtBytes(info.size)}). Download it instead.` : 'Binary file. Download it instead.'}</div>
+      {/* Video: the browser's own decoder first, and a re-encode on the machine when that fails. Audio as it is. */}
+      {info && text === null && !isImage(name) && info.preview === 'video' && <Player path={path} sudo={sudo} name={name} />}
+      {info && text === null && !isImage(name) && info.preview === 'audio' && !cantPlay && (
+        <div className="preview audio"><div className="audio-box"><div className="ficon">🎵</div><div className="mono small">{name}</div><audio controls preload="metadata" src={api.fileReadURL(path, sudo)} onError={() => setCantPlay(true)} /></div></div>
+      )}
+      {info && text === null && !isImage(name) && info.preview === 'audio' && cantPlay && (
+        <div className="notice">This browser can't play {name} as it is — the codec isn't one it decodes. Download it instead.</div>
+      )}
+      {info && text === null && !isImage(name) && !info.preview && !err && (
+        <div className="notice">{info.type === 'dir' ? 'This is a directory.' : info.type === 'other' ? 'This is a device, pipe or socket — nothing to show.' : info.broken ? `This link points at nothing (${info.target}).` : info.size > MAX_EDIT ? `Too large to edit here (${fmtBytes(info.size)}). Download it instead.` : 'Binary file. Download it instead.'}</div>
      )}
    </div>
  )
@@ -114,10 +297,19 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
  const [pathInput, setPathInput] = useState(path)
  const [open, setOpen] = useState<string | null>(null)
  const [menu, setMenu] = useState<string | null>(null)
+  const [moving, setMoving] = useState<FileEntry | null>(null)
+  const [moveTask, setMoveTask] = useState<TaskInfo | null>(null)
  const [upload, setUpload] = useState<{ name: string; pct: number; n: number; of: number } | null>(null)
  const [drag, setDrag] = useState(false)
  const fileInput = useRef<HTMLInputElement>(null)
  const canSudo = useRef(true)
+  const [previews, setPreviews] = useState<boolean>(() => { try { return localStorage.getItem(PREVIEWS_KEY) === '1' } catch { return false } })
+  const [thumbs, setThumbs] = useState<ThumbStatus | null>(null)
+  const [listEl, setListEl] = useState<HTMLDivElement | null>(null)
+  const near = useMemo(() => (listEl && previews ? new Near(listEl) : null), [listEl, previews])
+  const readThumbs = useCallback((refresh = false) => { api.thumbStatus(sudo, refresh).then(setThumbs).catch((e) => setThumbs({ ok: false, engine: '', summary: '', gpus: [], error: e instanceof Error ? e.message : 'failed', user: '', cache: { path: '', entries: 0, bytes: 0 } })) }, [sudo])
+  useEffect(() => { try { localStorage.setItem(PREVIEWS_KEY, previews ? '1' : '0') } catch { /* private mode */ } }, [previews])
+  useEffect(() => { if (previews) readThumbs(); else setThumbs(null) }, [previews, readThumbs])

  const load = useCallback(async (p = path, s = sudo) => {
    try {
@@ -127,15 +319,22 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
      sessionStorage.setItem('hamlab.files.path', p) // only a folder that opened is worth coming back to
    } catch (e) {
      const msg = e instanceof Error ? e.message : 'failed'
+      if (/not a directory/i.test(msg) && p !== '/') { // a file was typed: open it, from its folder
+        setPath(p.slice(0, p.lastIndexOf('/')) || '/'); setOpen(p); return
+      }
+      if (/no such file/i.test(msg) && p !== '/' && !sessionStorage.getItem('hamlab.files.lost')) { // gone since last time (another machine, a deleted folder)
+        sessionStorage.setItem('hamlab.files.lost', '1'); toast(`${p} isn't here — showing /`, 'info'); setPath('/'); return
+      }
      setErr(msg); setEntries([])
    }
+    sessionStorage.removeItem('hamlab.files.lost')
  }, [path, sudo])

  useEffect(() => { setEntries(null); setPathInput(path); setMenu(null); load(path, sudo); sessionStorage.setItem('hamlab.files.sudo', sudo ? '1' : '0') }, [path, sudo, load])
  useEffect(() => { const h = () => setMenu(null); window.addEventListener('click', h); return () => window.removeEventListener('click', h) }, [])
  useEscape(() => setMenu(null), menu !== null)

-  const go = (p: string) => { setOpen(null); setPath(p || '/') }
+  const go = (p: string) => { setOpen(null); setPath(resolvePath(p, path)) }
  const crumbs = path === '/' ? [] : path.slice(1).split('/')

  const shown = (entries ?? []).filter((e) => (hidden || !e.name.startsWith('.')) && (!q || e.name.toLowerCase().includes(q.toLowerCase())))
@@ -150,12 +349,10 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
  const act = async (label: string, fn: () => Promise<unknown>): Promise<boolean> => {
    try { await fn(); toast(label); await load(); return true } catch (e) { toast(`${label} — ${e instanceof Error ? e.message : 'failed'}`, 'err'); return false }
  }
-  // A name is one path segment. ("../x" and "a/b" would quietly act somewhere else.)
-  const okName = (n?: string | null): n is string => { const t = n?.trim(); if (!t) return false; if (t.includes('/') || t === '.' || t === '..') { toast('a name can\'t contain / or be . or .. — use Move… to put it elsewhere', 'err'); return false } return true }
  const mkdir = async () => { const n = await askText('New folder name'); if (okName(n)) act(`created ${n.trim()}`, () => api.fileMkdir(join(path, n.trim()), sudo)) }
  const touch = async () => { const n = await askText('New file name'); if (okName(n) && await act(`created ${n.trim()}`, () => api.fileTouch(join(path, n.trim()), sudo))) setOpen(join(path, n.trim())) } // opened only once it exists
  const rename = async (e: FileEntry) => { const n = await askText('Rename to', e.name); if (okName(n) && n.trim() !== e.name) act(`renamed to ${n.trim()}`, () => api.fileRename(join(path, e.name), join(path, n.trim()), sudo)) }
-  const move = async (e: FileEntry) => { const n = await askText('Move to (absolute path)', join(path, e.name)); if (n?.trim() && n.trim() !== join(path, e.name)) act(`moved to ${n.trim()}`, () => api.fileRename(join(path, e.name), n.trim(), sudo)) }
+  const move = (e: FileEntry) => setMoving(e)
  const chmod = async (e: FileEntry) => { const n = await askText(`Permissions for ${e.name} (octal)`, e.perm); if (n?.trim() && n.trim() !== e.perm) act(`chmod ${n.trim()} ${e.name}`, () => api.fileChmod(join(path, e.name), n.trim(), sudo)) }
  const del = async (e: FileEntry) => {
    const full = join(path, e.name)
@@ -171,6 +368,7 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
  // ---- upload ----
  const uploadFiles = async (files: FileList | File[]) => {
    const list = Array.from(files)
+    let done = 0
    for (let i = 0; i < list.length; i++) {
      const f = list[i]
      let overwrite = false
@@ -181,13 +379,22 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
      setUpload({ name: f.name, pct: 0, n: i + 1, of: list.length })
      try {
        await api.fileUpload(path, f, sudo, (pct) => setUpload({ name: f.name, pct, n: i + 1, of: list.length }), overwrite)
+        done++
      } catch (e) { toast(`upload ${f.name} — ${e instanceof Error ? e.message : 'failed'}`, 'err'); break }
    }
    setUpload(null)
-    toast(list.length === 1 ? `uploaded ${list[0].name}` : `uploaded ${list.length} files`)
-    load()
+    if (done === 1) toast(`uploaded ${list.length === 1 ? list[0].name : '1 file'}`)
+    else if (done > 1) toast(`uploaded ${done} files`)
+    if (done > 0) load()
+  }
+  // A dropped folder arrives as a nameless 0-byte "file"; the browser gives no way to read it here.
+  const onDrop = (e: DragEvent) => {
+    e.preventDefault(); setDrag(false)
+    const items = Array.from(e.dataTransfer.items ?? [])
+    const files = Array.from(e.dataTransfer.files).filter((_, i) => !(items[i]?.webkitGetAsEntry?.()?.isDirectory))
+    if (files.length < e.dataTransfer.files.length) toast('folders can\'t be dropped — drop the files inside, or upload a zip', 'err')
+    if (files.length) uploadFiles(files)
  }
-  const onDrop = (e: DragEvent) => { e.preventDefault(); setDrag(false); if (e.dataTransfer.files.length) uploadFiles(e.dataTransfer.files) }

  if (open) return <div className="files"><Viewer path={open} sudo={sudo} onClose={() => setOpen(null)} onChanged={() => load()} /></div>

@@ -202,6 +409,7 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
        <div className="files-tools">
          <button className={'btn' + (sudo ? ' on' : '')} title="browse as root" onClick={() => setSudo(!sudo)}>{sudo ? 'root' : 'sudo'}</button>
          <button className={'btn' + (hidden ? ' on' : '')} title="show hidden files" onClick={() => setHidden(!hidden)}>.hidden</button>
+          <button className={'btn' + (previews ? ' on' : '')} title={'thumbnails for images and videos' + (thumbs ? ` — ${thumbs.summary}` + (thumbs.cache.entries ? ` · ${thumbs.cache.entries} kept (${fmtBytes(thumbs.cache.bytes)})` : '') : '')} onClick={() => setPreviews(!previews)}>previews</button>
          <select className="btn" value={sort} onChange={(e) => setSort(e.target.value as Sort)}><option value="name">name</option><option value="size">size</option><option value="mtime">modified</option></select>
          <input className="filter" placeholder="filter" value={q} onChange={(e) => setQ(e.target.value)} />
          <button className="btn" onClick={mkdir}>+ folder</button>
@@ -213,10 +421,13 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
        </div>
      </div>

+      {previews && <ThumbNote st={thumbs} sudo={sudo} onChanged={() => readThumbs(true)} />}
+      {moveTask && <TaskOutput id={moveTask.id} onDone={(t) => { load(); if (t.exit_code === 0 && !t.error) toast(`${moveTask.title}: done`); else toast(`${moveTask.title}: failed`, 'err') }} />}
+      {moveTask && <div className="thumb-note"><button className="btn" onClick={() => setMoveTask(null)}>Hide output</button></div>}
      {upload && <div className="upload-bar"><Spinner /> {upload.of > 1 ? `${upload.n}/${upload.of} · ` : ''}{upload.name} · {upload.pct}%<div className="meter"><div className="fill" style={{ width: `${upload.pct}%` }} /></div></div>}
      {err && <div className="error" style={{ padding: '6px 12px' }}>{err}{/permission denied/i.test(err) && !sudo && <> · <button className="link" onClick={() => setSudo(true)}>retry as root</button></>}</div>}

-      <div className="file-list">
+      <div className={'file-list' + (previews ? ' thumbs' : '')} ref={setListEl}>
        {entries === null && <Loading label="Listing…" />}
        {path !== '/' && entries !== null && (
          <div className="file-row up" onClick={() => go(path.slice(0, path.lastIndexOf('/')) || '/')}><span className="ficon">↩</span><span className="fname">..</span></div>
@@ -226,7 +437,9 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
          const isDir = e.type === 'dir'
          return (
            <div key={e.name} className={'file-row' + (e.broken ? ' broken' : '')} onClick={() => (isDir ? go(full) : setOpen(full))}>
-              <span className="ficon">{icon(e)}</span>
+              {previews && e.preview && thumbs?.ok
+                ? <Thumb url={api.fileThumbURL(full, sudo, e.mtime, e.size)} kind={e.preview} near={near} fallback={icon(e)} />
+                : <span className="ficon">{icon(e)}</span>}
              <span className="fname" title={e.target ? `→ ${e.target}` : e.name}>{e.name}{e.target && <span className="muted"> → {e.target}</span>}</span>
              <span className="fmeta num">{isDir ? '' : fmtBytes(e.size)}</span>
              <span className="fmeta num">{fmtTime(e.mtime)}</span>
@@ -249,6 +462,7 @@ export default function Files({ onOpenInTerminal }: { onOpenInTerminal?: (cmd: s
        {entries !== null && shown.length === 0 && !err && <div className="muted" style={{ padding: 12 }}>{q ? 'Nothing matches.' : 'Empty folder.'}{!hidden && entries.some((e) => e.name.startsWith('.')) ? ' (hidden files not shown)' : ''}</div>}
      </div>
      {drag && <div className="drop-hint">Drop to upload into {path}</div>}
+      {moving && <MovePicker item={moving} from={path} sudo={sudo} hidden={hidden} onClose={() => setMoving(null)} onMoved={(t) => { setMoving(null); if (t) setMoveTask(t); load() }} />}
    </div>
  )
 }
@@ -0,0 +1,147 @@
+// A video in the Files viewer. First the file as it is, handed to the browser's own
+// decoder; when that fails — Safari and an MKV, HEVC without a hardware decoder — a
+// picker: codec and size, and the machine re-encodes it to HLS on its own GPU (or CPU),
+// which plays natively on Safari and through hls.js everywhere else. The same picker is
+// one tap away even when the file plays, for a 36 Mbps capture over a slow link.
+import { useCallback, useEffect, useRef, useState } from 'react'
+import { api, apiPath, PlayCaps, PlayStatus, PlayStream } from './api'
+import { Btn, Spinner } from './ui'
+
+type Mode = 'native' | 'pick' | 'hls'
+const CODEC_KEY = 'hamlab.play.codec'
+const QUALITY_KEY = 'hamlab.play.quality'
+const remember = (k: string, v: string) => { try { localStorage.setItem(k, v) } catch { /* private mode */ } }
+const recall = (k: string, d: string) => { try { return localStorage.getItem(k) || d } catch { return d } }
+
+const fmtMbps = (bps?: number) => (bps ? `${(bps / 1e6).toFixed(bps >= 10e6 ? 0 : 1)} Mbps` : '')
+const describe = (s: PlayStream) => {
+  const v = s.source.video
+  const src = v ? `${v.codec}${v.profile ? ' ' + v.profile : ''} ${v.width}×${v.height}${v.fps ? ` ${Math.round(v.fps)} fps` : ''}${s.source.bit_rate ? ` ${fmtMbps(s.source.bit_rate)}` : ''} in ${s.source.container.split(',')[0]}` : s.source.container
+  const out = s.codec === 'copy' ? 'repackaged' : `${s.codec === 'h264' ? 'H.264' : s.codec.toUpperCase()} ${s.width}×${s.height} ${(s.kbps / 1000).toFixed(s.kbps >= 10000 ? 0 : 1)} Mbps`
+  return `${src} → ${out} on ${s.engine}`
+}
+
+export default function Player({ path, sudo, name }: { path: string; sudo: boolean; name: string }) {
+  const [mode, setMode] = useState<Mode>('native')
+  const [why, setWhy] = useState('') // what brought the picker up
+  const [caps, setCaps] = useState<PlayCaps | null>(null)
+  const [codec, setCodec] = useState(() => recall(CODEC_KEY, 'h264'))
+  const [quality, setQuality] = useState(() => recall(QUALITY_KEY, '1080p'))
+  const [stream, setStream] = useState<{ s: PlayStream; url: string } | null>(null)
+  const [status, setStatus] = useState<PlayStatus | null>(null)
+  const [err, setErr] = useState('')
+  const video = useRef<HTMLVideoElement>(null)
+  const streamRef = useRef(stream)
+  streamRef.current = stream
+
+  useEffect(() => { setMode('native'); setWhy(''); setStream(null); setStatus(null); setErr('') }, [path, sudo])
+  useEffect(() => { remember(CODEC_KEY, codec) }, [codec])
+  useEffect(() => { remember(QUALITY_KEY, quality) }, [quality])
+  useEffect(() => { if (mode === 'pick' && !caps) api.playCaps(sudo).then(setCaps).catch((e) => setCaps({ codecs: [], qualities: [], error: e instanceof Error ? e.message : 'failed' })) }, [mode, caps, sudo])
+
+  // a stream is the machine's work: let go of it when this player does — and when the page
+  // itself goes, by a beacon, the one request a browser still sends on its way out
+  const stop = useCallback(() => { const s = streamRef.current; if (s) { api.playStop(s.s.id).catch(() => { /* gone already */ }); setStream(null); setStatus(null) } }, [])
+  useEffect(() => () => stop(), [stop])
+  useEffect(() => {
+    const h = () => { const s = streamRef.current; if (s) navigator.sendBeacon(apiPath(`/api/files/play/${s.s.id}/close`)) }
+    window.addEventListener('pagehide', h)
+    return () => window.removeEventListener('pagehide', h)
+  }, [])
+
+  const start = async () => {
+    setErr('')
+    try {
+      stop()
+      const r = await api.playStart(path, codec, quality, sudo)
+      setStream({ s: r.stream, url: r.url }); setMode('hls')
+    } catch (e) { setErr(e instanceof Error ? e.message : 'failed') }
+  }
+
+  // feed the stream to the element: Safari plays HLS itself, the rest through hls.js
+  useEffect(() => {
+    const v = video.current
+    if (mode !== 'hls' || !stream || !v) return
+    const url = apiPath(stream.url)
+    let hls: { destroy: () => void } | null = null
+    let gone = false
+    ;(async () => {
+      if (v.canPlayType('application/vnd.apple.mpegurl')) {
+        v.src = url
+      } else {
+        const { default: Hls } = await import('hls.js')
+        if (gone) return
+        if (!Hls.isSupported()) { setErr('this browser has neither HLS nor MediaSource — nothing can play here'); return }
+        const h = new Hls({ maxBufferLength: 60, backBufferLength: 30 })
+        hls = h
+        h.on(Hls.Events.ERROR, (_e, d) => { if (d.fatal) setErr(`playback failed: ${d.details}`) })
+        h.loadSource(url)
+        h.attachMedia(v)
+      }
+      v.play().catch(() => { /* needs a tap on some phones */ })
+    })()
+    return () => { gone = true; hls?.destroy() }
+  }, [mode, stream])
+
+  // follow the re-encode while it runs
+  useEffect(() => {
+    if (mode !== 'hls' || !stream) return
+    let stopPolling = false
+    const tick = async () => { try { const st = await api.playStatus(stream.s.id); if (!stopPolling) { setStatus(st); if (st.running) setTimeout(tick, 2000) } } catch { /* ended */ } }
+    tick()
+    return () => { stopPolling = true }
+  }, [mode, stream])
+
+  const pick = (reason: string) => { setWhy(reason); setMode('pick') }
+  const codecs = caps?.codecs ?? []
+
+  return (
+    <div className="player">
+      {mode === 'native' && (
+        <>
+          <div className="play-bar"><span>as it is</span><span className="spacer" /><button className="btn" onClick={() => pick('')}>Re-encode…</button></div>
+          <div className="preview"><video controls playsInline preload="metadata" src={api.fileReadURL(path, sudo)} onError={() => pick(`This browser can't play ${name} as it is — the container or codec isn't one it decodes.`)} /></div>
+        </>
+      )}
+      {mode === 'pick' && (
+        <div className="play-pick notice">
+          <div>{why || `Re-encode ${name} on this machine and play that instead.`}</div>
+          {caps?.error && <div className="error" style={{ marginTop: 8 }}>{caps.error}</div>}
+          {!caps && !err && <div className="muted small" style={{ marginTop: 8 }}><Spinner /> asking the machine what it can encode…</div>}
+          {caps && !caps.error && (
+            <div className="row">
+              <label>codec
+                <select value={codec} onChange={(e) => setCodec(e.target.value)}>
+                  {codecs.map((c) => <option key={c.id} value={c.id} disabled={!c.engine}>{c.label}{c.engine ? ` — ${c.engine}` : ' — not on this machine'}</option>)}
+                </select>
+              </label>
+              <label>size
+                <select value={quality} onChange={(e) => setQuality(e.target.value)} disabled={codec === 'copy'}>
+                  {caps.qualities.map((q) => <option key={q.id} value={q.id}>{q.label}</option>)}
+                </select>
+              </label>
+              <Btn className="btn on" disabled={!codecs.find((c) => c.id === codec)?.engine} onClick={start}>Play</Btn>
+              <a className="btn" href={api.fileDownloadURL(path, sudo)} download={name}>Download instead</a>
+            </div>
+          )}
+          {err && <div className="error" style={{ marginTop: 8 }}>{err}</div>}
+        </div>
+      )}
+      {mode === 'hls' && stream && (
+        <>
+          <div className="play-bar">
+            <span title={describe(stream.s)}>{describe(stream.s)}</span>
+            {status && status.running && <span>· {status.speed ? `${status.speed.toFixed(1)}×` : ''} {stream.s.source.duration ? `${Math.min(100, Math.round(status.progress / stream.s.source.duration * 100))}% through` : `${Math.round(status.progress)} s done`} — seek within what's done</span>}
+            {status?.done && <span>· all of it is ready</span>}
+            {status?.error && <span className="error">· stopped early: {status.error}</span>}
+            <span className="spacer" />
+            <button className="btn" onClick={() => { stop(); setMode('pick'); setWhy('') }}>Change…</button>
+          </div>
+          <div className="preview"><video ref={video} controls autoPlay playsInline /></div>
+          {err && <div className="error" style={{ margin: 12 }}>{err}</div>}
+        </>
+      )}
+    </div>
+  )
+}
+
@@ -101,7 +101,7 @@ export default function StackNew({ mode, from, networks = [], taken, onClose, on
          {homes.length > 1 && <label className="muted">Where
            <select value={home} onChange={(e) => setHome(e.target.value)}>{homes.map((h) => <option key={h.dir + h.via} value={h.dir}>{sameTail(h) ? h.dir : tail(h.dir)} · {h.stacks} stack{h.stacks === 1 ? '' : 's'}</option>)}</select>
          </label>}
-          {picked && <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{picked.dir}/{name || '…'}/compose.yaml{picked.held_by && ` — kept on ${picked.held_by}, deployed here over ${picked.remote}`}{picked.via && ` — compose runs inside ${picked.via}, like its neighbours`}</div>}
+          {picked && <div className="muted small mono" style={{ overflowWrap: 'anywhere' }}>{picked.dir}/{name || '…'}/compose.yaml{picked.via && ` — compose runs inside ${picked.via}, like its neighbours`}</div>}
          {!from && <div className="tabs"><button className={how === 'form' ? 'on' : ''} onClick={() => setHow('form')}>Form</button><button className={how === 'compose' ? 'on' : ''} onClick={toCompose}>Compose</button></div>}
          {how === 'form' ? <>
            <label className="muted">Image<input className="mono" value={form.image} onChange={set('image')} placeholder="traefik/whoami:latest" spellCheck={false} autoCapitalize="off" autoCorrect="off" /></label>
@@ -369,7 +369,8 @@ export default function Top() {
            <div className="t-up">up {upfor(uptime)}</div>
          </div>
          <div className="t-cores">
-            <div className="t-cores-head"><b>{model || 'cpu'}</b><span className="spacer" />{pt?.cpu_mhz ? `${Math.round(pt.cpu_mhz)} MHz` : ''}</div>
+            <div className="t-cores-head"><b>{model || 'cpu'}</b><span className="spacer" />{pt?.cpu_mhz ? `${Math.round(pt.cpu_mhz)} MHz` : ''}
+              {pt?.cpu_power_w ? <span title="the CPU's own power reading: cores, built-in graphics and memory controller, not the whole machine">{pt.cpu_mhz ? ' · ' : ''}{pt.cpu_power_w < 10 ? pt.cpu_power_w.toFixed(1) : Math.round(pt.cpu_power_w)} W</span> : null}</div>
            <div className="t-core">
              <span className="t-core-n">CPU</span>
              <Meter pct={cpu} grad="cpu" />
@@ -0,0 +1,86 @@
+// The graphical console of a VM: spice-html5 (vendored, loaded on demand) drawing the SPICE
+// stream that Ham Lab bridges from Incus into a canvas. Used for installers from an ISO, and
+// anything else with a screen rather than a serial line.
+import { useEffect, useRef, useState } from 'react'
+import { wsURLPath } from './api'
+import { Btn, useEscape } from './ui'
+// No spice.css: upstream's stylesheet is for its own demo page and sets body, *, button and
+// canvas for the whole document. Imported here it restyled every button in Ham Lab. The
+// console is styled by the .vga rules in styles.css.
+
+type Spice = typeof import('./vendor/spice-html5/src/main.js')
+
+export default function VgaConsole({ name, onClose }: { name: string; onClose: () => void }) {
+  const [state, setState] = useState<'loading' | 'connecting' | 'connected' | 'error'>('loading')
+  const [err, setErr] = useState('')
+  const [fit, setFit] = useState(true)
+  const [size, setSize] = useState('')
+  const conn = useRef<InstanceType<Spice['SpiceMainConn']> | null>(null)
+  const mod = useRef<Spice | null>(null)
+  const area = useRef<HTMLDivElement>(null)
+  const screen = useRef<HTMLDivElement>(null)
+  useEscape(onClose)
+
+  useEffect(() => {
+    let dead = false
+    import('./vendor/spice-html5/src/main.js').then((m) => {
+      if (dead) return
+      mod.current = m
+      setState('connecting')
+      try {
+        conn.current = new m.SpiceMainConn({
+          uri: wsURLPath(`/api/virt/instances/${encodeURIComponent(name)}/vga`),
+          screen_id: 'spice-screen', message_id: 'spice-message',
+          onerror: (e) => { setState('error'); setErr(e instanceof Error ? e.message : (e as Event & { reason?: string })?.reason || 'the console closed') },
+          onsuccess: () => setState('connected'),
+          onagent: () => { try { m.handle_resize() } catch { /* no agent in the guest yet */ } },
+        })
+      } catch (e) { setState('error'); setErr(String(e)) }
+    }).catch((e) => { setState('error'); setErr('could not load the SPICE viewer: ' + String(e)) })
+    return () => { dead = true; try { conn.current?.stop() } catch { /* already gone */ } conn.current = null }
+  }, [name])
+
+  // The guest draws at its own resolution; scale the canvas to the pane unless asked not to.
+  useEffect(() => {
+    const a = area.current, s = screen.current
+    if (!a || !s) return
+    const apply = () => {
+      const c = s.querySelector('canvas')
+      if (!c) return
+      setSize(`${c.width}×${c.height}`)
+      c.tabIndex = 1
+      if (!fit) { s.style.transform = ''; s.style.width = ''; s.style.height = ''; return }
+      const k = Math.min(1, (a.clientWidth - 8) / c.width, (a.clientHeight - 8) / c.height)
+      s.style.transformOrigin = 'top left'
+      s.style.transform = `scale(${k})`
+      s.style.width = `${c.width}px`; s.style.height = `${c.height}px`
+    }
+    apply()
+    const ro = new ResizeObserver(apply); ro.observe(a)
+    const mo = new MutationObserver(apply); mo.observe(s, { childList: true, attributes: true, subtree: true, attributeFilter: ['width', 'height'] })
+    return () => { ro.disconnect(); mo.disconnect() }
+  }, [fit, state])
+
+  const cad = () => { if (conn.current && mod.current) mod.current.sendCtrlAltDel(conn.current) }
+  const focus = () => screen.current?.querySelector('canvas')?.focus()
+  return (
+    <div className="modal-back vga-back" onClick={onClose}>
+      <div className="vga" onClick={(e) => e.stopPropagation()}>
+        <div className="logs-bar vga-bar">
+          <span className={'dot ' + (state === 'connected' ? 'ok' : state === 'error' ? 'bad' : 'warn')} />
+          <span className="dname">{name}</span>
+          <span className="muted small">{state === 'connected' ? `VGA · ${size || 'waiting for the first frame'}` : state === 'error' ? err : state === 'loading' ? 'loading the viewer…' : 'connecting…'}</span>
+          <span className="spacer" />
+          <Btn className="btn" disabled={state !== 'connected'} onClick={cad} title="send Ctrl+Alt+Del to the guest">Ctrl+Alt+Del</Btn>
+          <button className={'btn' + (fit ? ' on' : '')} onClick={() => setFit(!fit)} title="scale the screen to this window, or show it pixel for pixel">Fit</button>
+          <button className="btn" onClick={onClose}>Close</button>
+        </div>
+        <div className="vga-area" ref={area} onClick={focus}>
+          <div id="spice-area"><div id="spice-screen" ref={screen} /></div>
+          <div id="spice-message" className="spice-message vga-msg" />
+        </div>
+        <div className="muted small vga-hint">Click the screen to type into it. Keys go to the guest while it has focus; Escape with focus elsewhere closes this.</div>
+      </div>
+    </div>
+  )
+}
@@ -3,7 +3,8 @@
 // selected machine can do, never by a rule about what should run where. Everything the
 // tab makes lives under Ham Lab's own folder on that machine.
 import { FormEvent, Fragment, useCallback, useEffect, useMemo, useState } from 'react'
-import { api, LibraryFile, TaskInfo, VirtImage, VirtInstance, VirtOverview, VirtStatus } from './api'
+import { api, ExportsView, LibraryFile, TaskInfo, VirtImage, VirtInstance, VirtOverview, VirtStatus } from './api'
+import VgaConsole from './VgaConsole'
 import TaskOutput from './TaskOutput'
 import { useHashSel } from './hashsel'
 import { useRefreshMs } from './prefs'
@@ -24,6 +25,7 @@ export default function Virtualization() {
  const [tab, setTab] = useState<Tab>('instances')
  const [sel, setSel] = useHashSel('virt')
  const [making, setMaking] = useState<null | { image?: string; vm?: boolean }>(null)
+  const [fromIso, setFromIso] = useState<string | null>(null)
  const [task, setTask] = useState<{ id: string; title: string } | null>(null)
  const [filter, setFilter] = useState('')
  const rate = useRefreshMs()
@@ -77,10 +79,11 @@ export default function Virtualization() {
          </div>
        )}
        {tab === 'images' && <Images st={st} images={images} instances={instances} onTask={startTask} onNew={(image, vm) => { setTab('instances'); setMaking({ image, vm }) }} onChanged={load} />}
-        {tab === 'library' && <Library lib={ov.library} dir={st.dir} />}
+        {tab === 'library' && <Library st={st} ov={ov} onTask={startTask} onChanged={load} onNewVM={(iso) => setFromIso(iso)} />}
      </div>
-      {tab === 'instances' && (cur ? <Detail i={cur} st={st} onBack={() => setSel('')} onChanged={load} onTask={startTask} /> : <Summary ov={ov} />)}
+      {tab === 'instances' && (cur ? <Detail i={cur} st={st} onBack={() => setSel('')} onChanged={load} onTask={startTask} /> : <Summary ov={ov} onChanged={load} />)}
      {making && <NewInstance st={st} ov={ov} preset={making} onClose={() => setMaking(null)} onStarted={(t) => { setMaking(null); startTask(t) }} />}
+      {fromIso !== null && <NewVMFromISO st={st} ov={ov} iso={fromIso} onClose={() => setFromIso(null)} onStarted={(t) => { setFromIso(null); startTask(t); setTab('instances') }} />}
    </div>
  )
 }
@@ -148,11 +151,11 @@ function InstallDialog({ st, onClose, onStarted }: { st: VirtStatus; onClose: ()
        <div className="notice">Everything goes under <span className="mono">{st.dir}</span>: the pool's backing file, ISOs, images, exports. Where is not a choice; how big is.</div>
        <label className="muted">Pool driver
          <select value={driver} onChange={(e) => setDriver(e.target.value)}>
-            {st.drivers.map((d) => <option key={d} value={d}>{d}{d === 'zfs' ? ' — snapshots and clones are instant' : d === 'btrfs' ? ' — snapshots, on a loop file' : ' — plain files, no snapshots to speak of'}</option>)}
+            {st.drivers.map((d) => <option key={d} value={d}>{d === 'dir' ? 'plain files on this disk — each VM\u2019s disk is its own file, sized on its own; snapshots are copies' : d === 'zfs' ? 'zfs — one pre-sized file holding every disk; snapshots and clones are instant' : 'btrfs — one pre-sized file holding every disk; snapshots are instant'}</option>)}
          </select>
        </label>
        {driver !== 'dir' && (
-          <label className="muted">Pool size, GiB — a sparse file, grows as used · {fmtBytes(st.disk_free)} free
+          <label className="muted">Ceiling of that file, GiB — sparse, it grows only as disks fill it · {fmtBytes(st.disk_free)} free
            <input type="number" min={5} max={Math.floor(st.disk_free / GiB)} value={size} onChange={(e) => setSize(e.target.value)} required />
          </label>
        )}
@@ -184,7 +187,17 @@ function InstallDialog({ st, onClose, onStarted }: { st: VirtStatus; onClose: ()

 // ---- the right-hand pane when nothing is selected: what this machine's Incus is ----

-function Summary({ ov }: { ov: VirtOverview }) {
+// A location is a plain-files storage pool at a folder of his choosing.
+async function addLocation(onDone: (name: string) => void) {
+  const path = await askText('Folder on this machine for instance disks', '/', 'Next')
+  if (!path) return
+  const base = path.split('/').filter(Boolean).pop() ?? 'disks'
+  const name = await askText(`A name for ${path}`, base.toLowerCase().replace(/[^a-z0-9-]+/g, '-').replace(/^-|-$/g, ''), 'Add')
+  if (!name) return
+  try { const r = await api.virtPoolCreate(name, path); toast(`${r.name} added at ${r.path}`); onDone(r.name) } catch (e) { toast(errMsg(e), 'err') }
+}
+
+function Summary({ ov, onChanged }: { ov: VirtOverview; onChanged: () => void }) {
  const st = ov.status
  return (
    <div className="svc-detail">
@@ -195,9 +208,11 @@ function Summary({ ov }: { ov: VirtOverview }) {
        {st.layout && <div><span className="k">Installed</span><span>{when(st.layout.attempted)} by Ham Lab {st.layout.hamlab_version ?? ''}</span></div>}
        {!st.layout && <div><span className="k">Installed</span><span>outside Ham Lab — pools and networks below are as found</span></div>}
      </div>
-      <h3 className="stack-head">Storage pools</h3>
-      <table className="virt-table"><thead><tr><th>Pool</th><th>Driver</th><th>Source</th><th className="num">Used</th><th className="num">Of</th><th className="num">Users</th></tr></thead>
-        <tbody>{(ov.pools ?? []).map((p) => <tr key={p.name}><td>{p.name}</td><td>{p.driver}</td><td className="mono small">{p.source}</td><td className="num">{p.total ? fmtBytes(p.used) : '—'}</td><td className="num">{p.total ? fmtBytes(p.total) : '—'}</td><td className="num">{p.used_by}</td></tr>)}</tbody></table>
+      <h3 className="stack-head">Disk locations <span className="muted">· where an instance\u2019s disk can go</span></h3>
+      <table className="virt-table"><thead><tr><th>Location</th><th>Where</th><th className="num">Used</th><th className="num">Free</th><th className="num">Disks</th><th /></tr></thead>
+        <tbody>{(ov.pools ?? []).map((p) => <tr key={p.name}><td>{p.name}{p.name === ov.default_pool && <span className="badge">default</span>}</td><td>{p.where}<div className="muted small mono">{p.driver} · {p.source}</div></td><td className="num">{p.total ? fmtBytes(p.used) : '—'}</td><td className="num">{p.total ? fmtBytes(p.total - p.used) : '—'}</td><td className="num">{p.used_by}</td>
+          <td className="num">{p.used_by === 0 && p.name !== ov.default_pool && <Btn className="btn danger" confirm={`Remove the location ${p.name}? Nothing uses it; the folder itself is left alone.`} onClick={async () => { try { await api.virtPoolDelete(p.name); toast('removed'); onChanged() } catch (e) { toast(errMsg(e), 'err') } }}>Remove</Btn>}</td></tr>)}</tbody></table>
+      <div className="svc-actions"><Btn className="btn" onClick={() => addLocation(onChanged)}>+ Add a location…</Btn><span className="muted small">a folder on this machine; VM disks become files in it, containers folders</span></div>
      <h3 className="stack-head">Networks</h3>
      <table className="virt-table"><thead><tr><th>Network</th><th>Type</th><th>Address</th><th>NAT</th><th className="num">Users</th></tr></thead>
        <tbody>{(ov.networks ?? []).filter((n) => n.managed).map((n) => <tr key={n.name}><td>{n.name}</td><td>{n.type}</td><td className="mono small">{n.address ?? '—'}</td><td>{n.nat ? 'yes' : 'no'}</td><td className="num">{n.used_by}</td></tr>)}</tbody></table>
@@ -209,8 +224,10 @@ function Summary({ ov }: { ov: VirtOverview }) {
 // ---- one instance ----

 function Detail({ i, st, onBack, onChanged, onTask }: { i: VirtInstance; st: VirtStatus; onBack: () => void; onChanged: () => void; onTask: (t: TaskInfo) => void }) {
-  const [tab, setTab] = useState<'overview' | 'snapshots' | 'config'>('overview')
+  const [tab, setTab] = useState<'overview' | 'snapshots' | 'mounts' | 'config'>('overview')
+  const [vga, setVga] = useState(false)
  const running = i.status === 'Running'
+  const isVM = i.type === 'virtual-machine'
  const stopped = i.status === 'Stopped'
  const act = (a: 'start' | 'stop' | 'restart' | 'kill') => async () => { try { await api.virtAction(i.name, a); toast(`${i.name}: ${a} ok`); onChanged() } catch (e) { toast(`${i.name}: ${errMsg(e)}`, 'err') } }
  const term = (k: 'console' | 'exec') => async () => {
@@ -239,11 +256,11 @@ function Detail({ i, st, onBack, onChanged, onTask }: { i: VirtInstance; st: Vir
      <CloseBtn onClick={onBack} />
      <div className="svc-head"><button className="btn back" onClick={onBack}>‹ Back</button><span className={'sdot ' + dot(i)} /><span className="dname">{i.name}</span><span className="badge">{kind(i)}</span><span className={'badge' + (i.status === 'Error' ? ' bad' : '')}>{i.status.toLowerCase()}</span></div>
      <div className="props">
-        <div><span className="k">Image</span><span>{i.image || '—'}{i.arch ? <span className="muted"> · {i.arch}</span> : ''}</span></div>
+        <div><span className="k">Image</span><span>{i.image || (Object.keys(i.devices).some((d) => d.startsWith('iso')) ? 'none — installed from an ISO' : 'none')}{i.arch ? <span className="muted"> · {i.arch}</span> : ''}</span></div>
        {i.description && <div><span className="k">About</span><span>{i.description}</span></div>}
-        {running && <div><span className="k">Using</span><span>{i.cpu_pct.toFixed(0)}% of a core · {fmtBytes(i.mem_usage)}{i.mem_peak ? ` (peak ${fmtBytes(i.mem_peak)})` : ''}{i.processes ? ` · ${i.processes} processes` : ''}</span></div>}
+        {running && <div><span className="k">Using</span><span>{i.cpu_pct.toFixed(0)}% of a core · {fmtBytes(i.mem_usage)}{i.mem_peak ? ` (peak ${fmtBytes(i.mem_peak)})` : ''}{i.processes > 0 ? ` · ${i.processes} processes` : ''}</span></div>}
        <div><span className="k">Limits</span><span>{i.cpu ? `${i.cpu} CPU` : 'all CPUs'} · {i.memory || 'unlimited memory'}</span></div>
-        {i.disk_total > 0 && <div><span className="k">Disk</span><span>{fmtBytes(i.disk_usage)} of {fmtBytes(i.disk_total)}</span></div>}
+        <div><span className="k">Disk</span><span>{i.disk_total > 0 ? `${fmtBytes(i.disk_usage)} of ${fmtBytes(i.disk_total)}` : i.disk_usage > 0 ? fmtBytes(i.disk_usage) : 'no limit'}{i.devices.root?.pool ? <span className="muted"> · on {i.devices.root.pool}</span> : ''}</span></div>
        <div><span className="k">Network</span><span className="mono small">{i.ipv4.length ? i.ipv4.join('  ') : running ? 'no address yet' : '—'}</span></div>
        <div><span className="k">Created</span><span>{when(i.created)}</span></div>
      </div>
@@ -251,10 +268,12 @@ function Detail({ i, st, onBack, onChanged, onTask }: { i: VirtInstance; st: Vir
        {!running && <Btn className="btn on" onClick={act('start')}>Start</Btn>}
        {running && <Btn className="btn" onClick={term('exec')}>Shell</Btn>}
        <Btn className="btn" onClick={term('console')} title="the serial console: boot output, and a login prompt where the guest has one on it">Console</Btn>
+        {isVM && running && <Btn className="btn" onClick={() => setVga(true)} title="the VM's screen, keyboard and mouse — what an installer needs">VGA</Btn>}
        {running && <Btn className="btn" confirm={`Restart ${i.name}?`} onClick={act('restart')}>Restart</Btn>}
        {running && <Btn className="btn danger" confirm={`Stop ${i.name}? It is asked to shut down cleanly.`} onClick={act('stop')}>Stop</Btn>}
        {running && <Btn className="btn danger" confirm={`Force stop ${i.name}? Like pulling the plug — anything unsaved inside is lost.`} onClick={act('kill')}>Force stop</Btn>}
        <Btn className="btn" onClick={snap}>Snapshot</Btn>
+        <Btn className="btn" onClick={async () => { try { onTask(await api.virtExportsRun(i.name)) } catch (e) { toast(errMsg(e), 'err') } }} title="a tarball of it in the library's exports folder">Export</Btn>
        {stopped && <Btn className="btn" onClick={rename}>Rename</Btn>}
        {stopped && <Btn className="btn" onClick={publish} title="make an image of it, to launch more like it">Publish</Btn>}
        <Btn className="btn danger" onClick={del}>Delete…</Btn>
@@ -262,8 +281,11 @@ function Detail({ i, st, onBack, onChanged, onTask }: { i: VirtInstance; st: Vir
      <div className="tabs">
        <button className={tab === 'overview' ? 'on' : ''} onClick={() => setTab('overview')}>Limits</button>
        <button className={tab === 'snapshots' ? 'on' : ''} onClick={() => setTab('snapshots')}>Snapshots · {i.snapshots.length}</button>
+        <button className={tab === 'mounts' ? 'on' : ''} onClick={() => setTab('mounts')}>Disks · {Object.values(i.devices).filter((d) => d.type === 'disk').length}</button>
        <button className={tab === 'config' ? 'on' : ''} onClick={() => setTab('config')}>Config</button>
      </div>
+      {tab === 'mounts' && <Mounts i={i} st={st} onChanged={onChanged} />}
+      {vga && <VgaConsole name={i.name} onClose={() => setVga(false)} />}
      {tab === 'overview' && <Limits i={i} st={st} onChanged={onChanged} />}
      {tab === 'snapshots' && <Snapshots i={i} onChanged={onChanged} />}
      {tab === 'config' && (
@@ -338,6 +360,20 @@ function Snapshots({ i, onChanged }: { i: VirtInstance; onChanged: () => void })

 // ---- making one ----

+// Where an instance's disk goes. One entry is still a choice shown; a new one can be added here.
+function PoolPick({ ov, value, onChange }: { ov: VirtOverview; value: string; onChange: (v: string) => void }) {
+  const [extra, setExtra] = useState<{ name: string; where: string }[]>([])
+  const pools = [...(ov.pools ?? []).map((p) => ({ name: p.name, where: p.where + (p.total ? ` · ${fmtBytes(p.total - p.used)} free` : '') })), ...extra.filter((e) => !(ov.pools ?? []).some((p) => p.name === e.name))]
+  return (
+    <label className="muted">Disk location
+      <select value={value} onChange={(e) => { if (e.target.value === '+') addLocation((n) => { setExtra((x) => [...x, { name: n, where: 'just added' }]); onChange(n) }); else onChange(e.target.value) }}>
+        {pools.map((p) => <option key={p.name} value={p.name}>{p.name} — {p.where}</option>)}
+        <option value="+">+ add a location…</option>
+      </select>
+    </label>
+  )
+}
+
 function NewInstance({ st, ov, preset, onClose, onStarted }: { st: VirtStatus; ov: VirtOverview; preset: { image?: string; vm?: boolean }; onClose: () => void; onStarted: (t: TaskInfo) => void }) {
  const [vm, setVm] = useState(!!preset.vm && st.kvm)
  const [image, setImage] = useState(preset.image ?? '')
@@ -345,6 +381,7 @@ function NewInstance({ st, ov, preset, onClose, onStarted }: { st: VirtStatus; o
  const [cpu, setCpu] = useState('')
  const [mem, setMem] = useState('')
  const [disk, setDisk] = useState('')
+  const [pool, setPool] = useState(ov.default_pool || ov.pools?.[0]?.name || '')
  const nets = (ov.networks ?? []).filter((n) => n.managed || n.type === 'bridge')
  const [net, setNet] = useState(nets.find((n) => n.name === 'incusbr0')?.name ?? nets[0]?.name ?? '')
  const [cloud, setCloud] = useState('')
@@ -377,7 +414,7 @@ function NewInstance({ st, ov, preset, onClose, onStarted }: { st: VirtStatus; o
  }, [q, local, remote])
  const submit = async (e: FormEvent) => {
    e.preventDefault(); setErr(''); setBusy(true)
-    try { onStarted(await api.virtCreate({ name: name.trim(), image: image.trim(), vm, cpu: cpu.trim(), memory: mem.trim(), disk: disk.trim(), network: net, cloud_init: showCloud ? cloud : '', profiles: [], description: desc.trim(), start })) }
+    try { onStarted(await api.virtCreate({ name: name.trim(), image: image.trim(), vm, cpu: cpu.trim(), memory: mem.trim(), disk: disk.trim(), pool, network: net, cloud_init: showCloud ? cloud : '', profiles: [], description: desc.trim(), start })) }
    catch (e) { setErr(errMsg(e)); setBusy(false) }
  }
  return (
@@ -408,13 +445,15 @@ function NewInstance({ st, ov, preset, onClose, onStarted }: { st: VirtStatus; o
        <div className="virt-form-row">
          <label className="muted">CPUs<input className="mono" value={cpu} onChange={(e) => setCpu(e.target.value)} placeholder={vm ? '2' : 'all'} /></label>
          <label className="muted">Memory<input className="mono" value={mem} onChange={(e) => setMem(e.target.value)} placeholder={vm ? '2GiB' : 'unlimited'} /></label>
-          <label className="muted">Root disk<input className="mono" value={disk} onChange={(e) => setDisk(e.target.value)} placeholder={vm ? '20GiB' : 'pool default'} /></label>
+          <label className="muted">Root disk<input className="mono" value={disk} onChange={(e) => setDisk(e.target.value)} placeholder={vm ? '20GiB' : 'no limit'} /></label>
        </div>
+        <PoolPick ov={ov} value={pool} onChange={setPool} />
        <div className="muted small">{fmtBytes(st.mem_avail)} free on this machine.{vm ? ' A VM’s memory is a reservation.' : ''}</div>
        <label className="muted">Description — optional<input value={desc} onChange={(e) => setDesc(e.target.value)} maxLength={200} /></label>
        <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }}>
          <input type="checkbox" checked={showCloud} onChange={(e) => setShowCloud(e.target.checked)} style={{ width: 'auto' }} />cloud-init user-data (an SSH key, packages, a first command — needs a /cloud image)
        </label>
+        {showCloud && <div className="svc-actions"><Btn className="btn" onClick={async () => { try { const k = await api.virtSSHKeys(); if (!k.keys.length) { toast('no public keys found for ' + k.user, 'info'); return } setCloud(`#cloud-config\nusers:\n  - name: ${k.user}\n    groups: [sudo]\n    shell: /bin/bash\n    sudo: ALL=(ALL) NOPASSWD:ALL\n    ssh_authorized_keys:\n${k.keys.map((x) => '      - ' + x).join('\n')}\npackage_update: true\npackages: [curl, vim]\n`) } catch (e) { toast(errMsg(e), 'err') } }} title="a cloud-config that makes your account inside, with the public keys this machine's Ham Lab account holds">Use my SSH keys</Btn></div>}
        {showCloud && <textarea className="mono" rows={6} value={cloud} onChange={(e) => setCloud(e.target.value)} placeholder={'#cloud-config\nusers:\n  - name: core\n    ssh_authorized_keys:\n      - ssh-ed25519 AAAA…\n    sudo: ALL=(ALL) NOPASSWD:ALL\npackages: [curl]'} spellCheck={false} />}
        <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }}>
          <input type="checkbox" checked={start} onChange={(e) => setStart(e.target.checked)} style={{ width: 'auto' }} />Start it once made
@@ -493,17 +532,184 @@ function Images({ st, images, instances, onTask, onNew, onChanged }: { st: VirtS
  )
 }

-function Library({ lib, dir }: { lib: { images: LibraryFile[]; isos: LibraryFile[] }; dir: string }) {
+function Mounts({ i, st, onChanged }: { i: VirtInstance; st: VirtStatus; onChanged: () => void }) {
+  const [src, setSrc] = useState('')
+  const [dst, setDst] = useState('')
+  const [dev, setDev] = useState('')
+  const [ro, setRo] = useState(false)
+  const [shift, setShift] = useState(true)
+  const isos = st.dir + '/isos/'
+  const disks = Object.entries(i.devices).filter(([, d]) => d.type === 'disk').sort()
+  const add = async (e: FormEvent) => {
+    e.preventDefault()
+    try { const r = await api.virtMountAdd(i.name, { device: dev.trim(), source: src.trim(), path: dst.trim(), readonly: ro, shift }); toast(`mounted as ${r.device}`); setSrc(''); setDst(''); setDev(''); onChanged() } catch (er) { toast(errMsg(er), 'err') }
+  }
+  const remove = async (d: string, iso: boolean) => {
+    if (!(await askYes(iso ? `Eject ${d} from ${i.name}?` : `Remove the mount ${d} from ${i.name}? Nothing on the host is touched.`, iso ? 'Eject' : 'Remove'))) return
+    try { if (iso) await api.virtISODetach(i.name, d); else await api.virtMountRemove(i.name, d); toast('done'); onChanged() } catch (e) { toast(errMsg(e), 'err') }
+  }
+  return (
+    <>
+      <table className="virt-table"><thead><tr><th>Device</th><th>Source</th><th>Inside</th><th /></tr></thead>
+        <tbody>{disks.map(([name, d]) => { const iso = (d.source ?? '').startsWith(isos); return (
+          <tr key={name}><td className="mono">{name}{iso && <span className="badge">ISO</span>}{d['boot.priority'] && <span className="badge">boots first</span>}</td>
+            <td className="mono small">{name === 'root' ? `pool ${d.pool}${d.size ? ` · ${d.size}` : ''}` : iso ? (d.source ?? '').slice(isos.length) : d.source}</td>
+            <td className="mono small">{iso ? 'CD-ROM' : d.path}{d.readonly === 'true' ? ' · read only' : ''}{d.shift === 'true' ? ' · shifted' : ''}</td>
+            <td className="num">{name !== 'root' && <Btn className="btn danger" onClick={() => remove(name, iso)}>{iso ? 'Eject' : 'Remove'}</Btn>}</td></tr>) })}</tbody></table>
+      <section className="card">
+        <div className="sub-head"><span className="dname">Mount a folder from this machine</span></div>
+        <form onSubmit={add}>
+          <div className="virt-form-row">
+            <label className="muted">Host path<input className="mono" value={src} onChange={(e) => setSrc(e.target.value)} placeholder="/tank/media" spellCheck={false} required /></label>
+            <label className="muted">Path inside<input className="mono" value={dst} onChange={(e) => setDst(e.target.value)} placeholder="/mnt/media" spellCheck={false} required /></label>
+            <label className="muted">Device name — optional<input className="mono" value={dev} onChange={(e) => setDev(e.target.value)} placeholder="mnt-media" spellCheck={false} /></label>
+          </div>
+          <div className="virt-form-row" style={{ alignItems: 'center' }}>
+            <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }}><input type="checkbox" checked={ro} onChange={(e) => setRo(e.target.checked)} style={{ width: 'auto' }} />read only</label>
+            {i.type === 'container' && <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }} title="map the host's file ownership into the container's user range, so files look owned by the same names inside"><input type="checkbox" checked={shift} onChange={(e) => setShift(e.target.checked)} style={{ width: 'auto' }} />shift ownership</label>}
+            <span className="spacer" />
+            <button className="btn on" disabled={!src.trim() || !dst.trim()}>Mount</button>
+          </div>
+        </form>
+        <div className="muted small">{i.type === 'container' ? 'A bind mount; it appears at once, running or not.' : 'Shared into the VM over virtiofs; its agent mounts it. Appears at once on a running VM with the agent, otherwise at the next start.'} The data stays where it is — this is the instance’s device, not a copy.</div>
+      </section>
+    </>
+  )
+}
+
+function NewVMFromISO({ st, ov, iso, onClose, onStarted }: { st: VirtStatus; ov: VirtOverview; iso: string; onClose: () => void; onStarted: (t: TaskInfo) => void }) {
+  const isos = ov.library.isos
+  const [pick, setPick] = useState(iso || isos[0]?.name || '')
+  const [name, setName] = useState('')
+  const [cpu, setCpu] = useState('2')
+  const [mem, setMem] = useState('2GiB')
+  const [disk, setDisk] = useState('20GiB')
+  const [pool, setPool] = useState(ov.default_pool || ov.pools?.[0]?.name || '')
+  const nets = (ov.networks ?? []).filter((n) => n.managed || n.type === 'bridge')
+  const [net, setNet] = useState(nets.find((n) => n.name === 'incusbr0')?.name ?? nets[0]?.name ?? '')
+  const [sb, setSb] = useState(true)
+  const [err, setErr] = useState('')
+  const [busy, setBusy] = useState(false)
+  useEscape(onClose)
+  const submit = async (e: FormEvent) => {
+    e.preventDefault(); setErr(''); setBusy(true)
+    try { onStarted(await api.virtFromISO({ name: name.trim(), iso: pick, cpu: cpu.trim(), memory: mem.trim(), disk: disk.trim(), pool, network: net, secureboot: sb, start: true })) }
+    catch (e) { setErr(errMsg(e)); setBusy(false) }
+  }
+  return (
+    <div className="modal-back" onClick={onClose}>
+      <form className="modal" onClick={(e) => e.stopPropagation()} onSubmit={submit}>
+        <h3>New VM from an ISO</h3>
+        <label className="muted">ISO<select value={pick} onChange={(e) => setPick(e.target.value)}>{isos.map((f) => <option key={f.name} value={f.name}>{f.name} · {fmtBytes(f.size)}</option>)}</select></label>
+        <div className="virt-form-row">
+          <label className="muted">Name<input value={name} onChange={(e) => setName(e.target.value)} pattern="[a-zA-Z][a-zA-Z0-9\-]{0,62}" placeholder="win11" spellCheck={false} autoCapitalize="off" autoCorrect="off" required /></label>
+          <label className="muted">Network<select value={net} onChange={(e) => setNet(e.target.value)}>{nets.map((n) => <option key={n.name} value={n.name}>{n.name}{n.address ? ` · ${n.address}` : ''}</option>)}</select></label>
+        </div>
+        <div className="virt-form-row">
+          <label className="muted">CPUs<input className="mono" value={cpu} onChange={(e) => setCpu(e.target.value)} /></label>
+          <label className="muted">Memory<input className="mono" value={mem} onChange={(e) => setMem(e.target.value)} /></label>
+          <label className="muted">Disk<input className="mono" value={disk} onChange={(e) => setDisk(e.target.value)} /></label>
+        </div>
+        <PoolPick ov={ov} value={pool} onChange={setPool} />
+        <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8 }}>
+          <input type="checkbox" checked={sb} onChange={(e) => setSb(e.target.checked)} style={{ width: 'auto' }} />Secure Boot — Windows, Debian, Ubuntu and Fedora boot with it; Alpine, Arch, TrueNAS and most others need it off
+        </label>
+        <div className="muted small">An empty VM with the ISO as its first boot device, started, so the installer is on the VGA console. {fmtBytes(st.mem_avail)} free here; a VM’s memory is a reservation. Windows also wants the virtio drivers ISO attached as a second drive — add it from the VM’s Disks tab.</div>
+        {err && <div className="error">{err}</div>}
+        <div className="svc-actions">
+          <button type="submit" className="btn on" disabled={busy || !pick || !name.trim()}>{busy ? 'Starting…' : 'Create and boot the ISO'}</button>
+          <span className="spacer" />
+          <button type="button" className="btn" onClick={onClose}>Cancel</button>
+        </div>
+      </form>
+    </div>
+  )
+}
+
+function Library({ st, ov, onTask, onChanged, onNewVM }: { st: VirtStatus; ov: VirtOverview; onTask: (t: TaskInfo) => void; onChanged: () => void; onNewVM: (iso: string) => void }) {
+  const lib = ov.library
+  const vms = (ov.instances ?? []).filter((i) => i.type === 'virtual-machine')
+  const [url, setUrl] = useState(''); const [sha, setSha] = useState(''); const [path, setPath] = useState('')
+  const [upload, setUpload] = useState<{ name: string; pct: number } | null>(null)
+  const [exp, setExp] = useState<ExportsView | null>(null)
+  const [cfg, setCfg] = useState<ExportsView['config'] | null>(null)
+  const loadExports = useCallback(() => api.virtExports().then((v) => { setExp(v); setCfg(v.config) }).catch(() => setExp(null)), [])
+  useEffect(() => { loadExports() }, [loadExports])
+  const uploadFiles = async (files: FileList | null) => {
+    if (!files?.length) return
+    for (const f of Array.from(files)) {
+      if (!/\.(iso|img)$/i.test(f.name)) { toast(`${f.name}: only .iso or .img files`, 'err'); continue }
+      setUpload({ name: f.name, pct: 0 })
+      try { await api.fileUpload(st.dir + '/isos', f, false, (pct) => setUpload({ name: f.name, pct })); toast(`uploaded ${f.name}`) } catch (e) { toast(`${f.name}: ${errMsg(e)}`, 'err') }
+    }
+    setUpload(null); onChanged()
+  }
+  const fetchISO = async (e: FormEvent) => { e.preventDefault(); try { onTask(await api.virtISOFetch(url.trim(), sha.trim(), '')); setUrl(''); setSha('') } catch (er) { toast(errMsg(er), 'err') } }
+  const importISO = async (e: FormEvent) => { e.preventDefault(); try { onTask(await api.virtISOImport(path.trim())); setPath('') } catch (er) { toast(errMsg(er), 'err') } }
+  const attach = async (f: LibraryFile) => {
+    if (vms.length === 0) { toast('no VM to attach it to — make one first, or use New VM from ISO', 'info'); return }
+    const vm = vms.length === 1 ? vms[0].name : await askText(`Attach ${f.name} to which VM? (${vms.map((v) => v.name).join(', ')})`, vms[0].name, 'Attach')
+    if (!vm) return
+    const first = await askYes(`Boot ${vm} from ${f.name} first, ahead of its disk? Say no to just make it available as a CD-ROM.`, 'Boot first')
+    try { const r = await api.virtISOAttach(vm, f.name, first); toast(`${f.name} in ${vm} as ${r.device}`); onChanged() } catch (e) { toast(errMsg(e), 'err') }
+  }
+  const del = async (f: LibraryFile) => { if (!(await askYes(`Delete ${f.name} from the library?`, 'Delete'))) return; try { await api.virtISODelete(f.name); toast('deleted'); onChanged() } catch (e) { toast(errMsg(e), 'err') } }
+  const rename = async (f: LibraryFile) => { const to = await askText(`Rename ${f.name} to`, f.name, 'Rename'); if (!to || to === f.name) return; try { await api.virtISORename(f.name, to); toast('renamed'); onChanged() } catch (e) { toast(errMsg(e), 'err') } }
+  const saveExports = async () => { if (!cfg) return; try { await api.virtExportsPut(cfg); toast(cfg.enabled ? 'exports scheduled' : 'exports paused'); loadExports() } catch (e) { toast(errMsg(e), 'err') } }
+  const delExport = async (inst: string, name: string) => { if (!(await askYes(`Delete the export ${name}?`, 'Delete'))) return; try { await api.virtExportDelete(inst, name); loadExports() } catch (e) { toast(errMsg(e), 'err') } }
  const table = (files: LibraryFile[]) => files.length === 0 ? <div className="muted small">empty</div> : (
    <table className="virt-table"><thead><tr><th>File</th><th className="num">Size</th><th>Changed</th></tr></thead>
      <tbody>{files.map((f) => <tr key={f.name}><td className="mono">{f.name}</td><td className="num">{fmtBytes(f.size)}</td><td>{when(f.modified)}</td></tr>)}</tbody></table>
  )
  return (
    <div className="svc-rows" style={{ padding: 12, display: 'flex', flexDirection: 'column', gap: 14 }}>
-      <section className="card"><div className="sub-head"><span className="dname">Images</span><span className="spacer" /><span className="muted small mono">{dir}/images</span></div>{table(lib.images)}
+      <section className="card">
+        <div className="sub-head"><span className="dname">ISOs</span><span className="spacer" /><span className="muted small mono">{st.dir}/isos</span></div>
+        {lib.isos.length === 0 && <div className="muted small">No ISOs yet. Upload one, fetch one by URL, or import a file already on this machine.</div>}
+        {lib.isos.length > 0 && (
+          <table className="virt-table"><thead><tr><th>File</th><th className="num">Size</th><th>In</th><th /></tr></thead>
+            <tbody>{lib.isos.map((f) => (
+              <tr key={f.name}><td className="mono">{f.name}</td><td className="num">{fmtBytes(f.size)}</td><td className="small">{f.attached_to?.join(' ') || '—'}</td>
+                <td className="num" style={{ whiteSpace: 'normal' }}>
+                  {st.kvm && <Btn className="btn on" onClick={() => onNewVM(f.name)}>New VM</Btn>} {st.kvm && <Btn className="btn" onClick={() => attach(f)}>Attach…</Btn>} <Btn className="btn" onClick={() => rename(f)}>Rename</Btn> <Btn className="btn danger" disabled={!!f.attached_to?.length} title={f.attached_to?.length ? 'attached — eject it first' : ''} onClick={() => del(f)}>Delete</Btn>
+                </td></tr>
+            ))}</tbody></table>
+        )}
+        <div className="virt-form-row" style={{ flexWrap: 'wrap', marginTop: 8 }}>
+          <label className="btn" style={{ alignSelf: 'flex-end' }}>{upload ? `${upload.name} · ${upload.pct}%` : 'Upload…'}<input type="file" accept=".iso,.img" multiple style={{ display: 'none' }} onChange={(e) => uploadFiles(e.target.files)} /></label>
+          <form onSubmit={fetchISO} className="virt-form-row" style={{ flex: '2 1 320px' }}>
+            <label className="muted" style={{ flex: 3 }}>Fetch from a URL<input className="mono" value={url} onChange={(e) => setUrl(e.target.value)} placeholder="https://…/something.iso" spellCheck={false} /></label>
+            <label className="muted" style={{ flex: 2 }}>sha256 — optional<input className="mono" value={sha} onChange={(e) => setSha(e.target.value)} spellCheck={false} /></label>
+            <button className="btn" style={{ alignSelf: 'flex-end' }} disabled={!url.trim()}>Fetch</button>
+          </form>
+          <form onSubmit={importISO} className="virt-form-row" style={{ flex: '1 1 260px' }}>
+            <label className="muted" style={{ flex: 1 }}>Import a file on this machine — copied in<input className="mono" value={path} onChange={(e) => setPath(e.target.value)} placeholder="/tank/software/isos/…/x.iso" spellCheck={false} /></label>
+            <button className="btn" style={{ alignSelf: 'flex-end' }} disabled={!path.trim()}>Import</button>
+          </form>
+        </div>
+        <div className="muted small">{st.kvm ? 'An ISO attaches to a VM as a CD-ROM, live or stopped; “New VM” makes an empty VM that boots it, for an installer on the VGA console.' : 'This machine has no KVM, so there is nothing here to boot an ISO.'}</div>
+      </section>
+      <section className="card">
+        <div className="sub-head"><span className="dname">Exports</span><span className="spacer" /><span className="muted small mono">{st.dir}/exports</span></div>
+        {cfg && (
+          <div className="virt-form-row" style={{ flexWrap: 'wrap', alignItems: 'flex-end' }}>
+            <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8, flex: '0 0 auto' }}><input type="checkbox" checked={cfg.enabled} onChange={(e) => setCfg({ ...cfg, enabled: e.target.checked })} style={{ width: 'auto' }} />nightly</label>
+            <label className="muted" style={{ flex: '0 0 90px' }}>at<input className="mono" type="time" value={`${String(cfg.hour).padStart(2, '0')}:${String(cfg.minute).padStart(2, '0')}`} onChange={(e) => { const [h, m] = e.target.value.split(':').map(Number); if (!isNaN(h) && !isNaN(m)) setCfg({ ...cfg, hour: h, minute: m }) }} /></label>
+            <label className="muted" style={{ flex: '0 0 110px' }}>keep per instance<input className="mono" type="number" min={1} max={100} value={cfg.keep} onChange={(e) => setCfg({ ...cfg, keep: Number(e.target.value) || 1 })} /></label>
+            <label className="muted" style={{ flexDirection: 'row', alignItems: 'center', gap: 8, flex: '0 0 auto' }}><input type="checkbox" checked={!cfg.instance_only} onChange={(e) => setCfg({ ...cfg, instance_only: !e.target.checked })} style={{ width: 'auto' }} />include snapshots</label>
+            <span className="spacer" />
+            <Btn className="btn on" disabled={JSON.stringify(cfg) === JSON.stringify(exp?.config)} onClick={saveExports}>Save</Btn>
+            <Btn className="btn" onClick={async () => { try { onTask(await api.virtExportsRun()) } catch (e) { toast(errMsg(e), 'err') } }}>Export all now</Btn>
+          </div>
+        )}
+        {exp && <div className="muted small" style={{ marginTop: 6 }}>{exp.config.enabled ? <>Cron line in <span className="mono">{exp.cron_file}</span>, next {exp.next ? new Date(exp.next).toLocaleString() : '—'}.</> : 'Not scheduled.'} {exp.last ? <>Last run {when(exp.last.at)}: {exp.last.exported.length} exported, {exp.last.pruned.length} pruned{exp.last.errors?.length ? <span className="warn-text">, {exp.last.errors.length} failed: {exp.last.errors.join('; ')}</span> : ''}.</> : 'Never run.'} Every instance as a tarball Incus can import again; the folder is backed up with the rest of Ham Lab’s data.</div>}
+        {exp && exp.files.length > 0 && (
+          <table className="virt-table" style={{ marginTop: 8 }}><thead><tr><th>Instance</th><th>Export</th><th className="num">Size</th><th>Taken</th><th /></tr></thead>
+            <tbody>{exp.files.map((f) => <tr key={f.instance + f.name}><td>{f.instance}</td><td className="mono small">{f.name}</td><td className="num">{fmtBytes(f.size)}</td><td>{when(f.modified)}</td><td className="num"><Btn className="btn danger" onClick={() => delExport(f.instance, f.name)}>Delete</Btn></td></tr>)}</tbody></table>
+        )}
+      </section>
+      <section className="card"><div className="sub-head"><span className="dname">Images</span><span className="spacer" /><span className="muted small mono">{st.dir}/images</span></div>{table(lib.images)}
        <div className="muted small">Every image downloaded, imported or published lands here as a file, so the library is whole without Incus and can be reloaded into a fresh install.</div></section>
-      <section className="card"><div className="sub-head"><span className="dname">ISOs</span><span className="spacer" /><span className="muted small mono">{dir}/isos</span></div>{table(lib.isos)}
-        <div className="muted small">ISO installs for VMs — upload, fetch by URL, attach, and the graphical console they need — are the next phase. Files put here now will be listed when it lands.</div></section>
    </div>
  )
 }
@@ -85,7 +85,7 @@ export interface GPU {
  mhz?: number; req_mhz?: number; max_mhz?: number; mem_used?: number; mem_total?: number
  clients: GPUClient[]; clients_ok: boolean; stalled?: boolean
 }
-export interface ProcTable { t: number; cpu: number; cores: number[]; cpu_hist: number[]; cpu_model?: string; cpu_mhz?: number; cpu_max_mhz?: number; cpu_temp?: number; core_ids?: number[]; load: [number, number, number]; mem: MemInfo; swap: MemInfo; net: NetIf[]; gpus?: GPU[]; uptime: number; procs: Proc[]; total: number; running: number }
+export interface ProcTable { t: number; cpu: number; cores: number[]; cpu_hist: number[]; cpu_model?: string; cpu_mhz?: number; cpu_max_mhz?: number; cpu_power_w?: number; cpu_temp?: number; core_ids?: number[]; load: [number, number, number]; mem: MemInfo; swap: MemInfo; net: NetIf[]; gpus?: GPU[]; uptime: number; procs: Proc[]; total: number; running: number }
 export interface Sample {
  t: number; interval_ms: number; cpu: number; cores: number[]; load: [number, number, number]
  mem: { total: number; used: number; avail: number }; swap: { total: number; used: number; avail: number }
@@ -154,8 +154,8 @@ export interface Hardware { at: string; system: HWSystem; board: HWBoard; cpu: H

 export interface DockerLogLine { t: string; m: string; err?: boolean }
 export interface DockerInfo { available: boolean; message?: string; tool?: string; containers: DockerContainer[]; images: Record<string, unknown>[]; volumes: Record<string, unknown>[]; networks: Record<string, unknown>[] }
-export interface Stack { name: string; containers: string[]; running: number; file: string; host_file: string; files: string[]; host_files: string[] | null; images: string[] | null; via: string; remote: string; held_by: string; editable: boolean; note?: string; has_env: boolean }
-export interface StackHome { dir: string; inner: string; via: string; remote: string; held_by: string; stacks: number; default: boolean }
+export interface Stack { name: string; containers: string[]; running: number; file: string; host_file: string; files: string[]; host_files: string[] | null; images: string[] | null; via: string; editable: boolean; note?: string; has_env: boolean }
+export interface StackHome { dir: string; inner: string; via: string; stacks: number; default: boolean }
 export interface ImageCheck { image: string; state: 'current' | 'update' | 'unknown'; detail?: string }
 export interface StackDiff { name: string; base: '' | 'deployed' | 'saved'; old: string; new: string }
 export interface AlertRule { id: string; name: string; sensor: string; op: string; value: number | boolean | string; for_sec: number; severity: 'info' | 'warn' | 'crit'; enabled: boolean; machines: string }
@@ -249,7 +249,14 @@ export interface ARCDetail {
 }
 export interface ARCView { detail: ARCDetail; live: ARCLive | null }

-export interface FileEntry { name: string; type: 'dir' | 'file' | 'link' | 'other'; size: number; mode: string; perm: string; mtime: number; user: string; group: string; target?: string; broken?: boolean }
+export interface FileEntry { name: string; type: 'dir' | 'file' | 'link' | 'other'; size: number; mode: string; perm: string; mtime: number; user: string; group: string; target?: string; broken?: boolean; preview?: 'image' | 'video' | 'audio' }
+export interface PlayCaps { codecs: { id: string; label: string; engine?: string }[]; qualities: { id: string; label: string; height: number }[]; error?: string }
+export interface PlayTrack { codec: string; profile?: string; pix_fmt?: string; width?: number; height?: number; fps?: number; channels?: number }
+export interface PlayStream { id: string; codec: string; quality: string; engine: string; width: number; height: number; kbps: number; source: { container: string; duration: number; bit_rate?: number; video?: PlayTrack; audio?: PlayTrack } }
+export interface PlayStatus { running: boolean; done: boolean; error?: string; progress: number; speed: number; segments: number }
+export interface ThumbGPU { api: string; device: string; name?: string; codecs?: string[]; reason?: string; permission?: boolean }
+// How previews get made on the machine: ok with an engine, or why not and what would fix it.
+export interface ThumbStatus { ok: boolean; engine: 'gpu' | 'cpu' | ''; summary: string; ffmpeg?: string; gpus: ThumbGPU[]; unusable?: ThumbGPU[]; error?: string; install?: { pm: string; package: string }; gpu_fix?: boolean; user: string; cache: { path: string; entries: number; bytes: number } }
 export interface FileInfo extends FileEntry { path: string; text: boolean }

 const q = (path: string, sudo: boolean, extra = '') => `path=${encodeURIComponent(path)}${sudo ? '&sudo=1' : ''}${extra}`
@@ -260,12 +267,17 @@ export interface VirtStatus { state: 'ready' | 'repair' | 'installable' | 'unava
 export interface VirtSnapshot { name: string; created: string; expires?: string; size?: number }
 export interface VirtInstance { name: string; type: 'container' | 'virtual-machine'; status: string; arch: string; description?: string; image: string; os?: string; release?: string; cpu?: string; memory?: string; created: string; last_used: string; ipv4: string[]; snapshots: VirtSnapshot[]; profiles: string[]; ephemeral: boolean; cpu_pct: number; mem_usage: number; mem_peak: number; disk_usage: number; disk_total: number; pid: number; processes: number; config: Record<string, string>; devices: Record<string, Record<string, string>>; schedule?: string; expiry?: string }
 export interface VirtImage { fingerprint: string; aliases: string[]; arch: string; type: string; size: number; created: string; last_used: string; description: string; os?: string; release?: string; variant?: string; cached: boolean; source?: string; public: boolean }
-export interface VirtPool { name: string; driver: string; source: string; used: number; total: number; used_by: number }
+export interface VirtPool { name: string; driver: string; source: string; where: string; used: number; total: number; used_by: number }
 export interface VirtNetwork { name: string; type: string; managed: boolean; address?: string; nat: boolean; used_by: number }
-export interface LibraryFile { name: string; size: number; modified: string }
-export interface VirtOverview { status: VirtStatus; error?: string; instances?: VirtInstance[]; images?: VirtImage[]; pools?: VirtPool[]; networks?: VirtNetwork[]; library: { images: LibraryFile[]; isos: LibraryFile[] } }
+export interface LibraryFile { name: string; size: number; modified: string; attached_to?: string[] }
+export interface ExportConfig { enabled: boolean; hour: number; minute: number; keep: number; instance_only: boolean; instances?: string[]; updated?: string }
+export interface ExportRun { at: string; exported: string[]; pruned: string[]; errors?: string[]; seconds: number }
+export interface ExportFile { instance: string; name: string; size: number; modified: string }
+export interface ExportsView { config: ExportConfig; cron: string; next?: string; last: ExportRun | null; files: ExportFile[]; dir: string; cron_file: string }
+export interface FromISO { name: string; iso: string; cpu: string; memory: string; disk: string; pool: string; network: string; secureboot: boolean; start: boolean }
+export interface VirtOverview { status: VirtStatus; error?: string; instances?: VirtInstance[]; images?: VirtImage[]; pools?: VirtPool[]; default_pool?: string; networks?: VirtNetwork[]; library: { images: LibraryFile[]; isos: LibraryFile[] } }
 export interface VirtInstallOpts { driver: string; pool_size_gib: number; subnet: string; docker_rules: boolean; arc_max_gib: number }
-export interface VirtCreate { name: string; image: string; vm: boolean; cpu: string; memory: string; disk: string; network: string; cloud_init: string; profiles: string[]; description: string; start: boolean }
+export interface VirtCreate { name: string; image: string; vm: boolean; cpu: string; memory: string; disk: string; pool: string; network: string; cloud_init: string; profiles: string[]; description: string; start: boolean }

 export const api = {
  procs: () => req<ProcTable>('GET', '/api/procs'),
@@ -287,6 +299,16 @@ export const api = {
  },
  fileReadURL: (path: string, sudo: boolean) => apiPath(`/api/files/read?${q(path, sudo)}`),
  fileDownloadURL: (path: string, sudo: boolean) => apiPath(`/api/files/download?${q(path, sudo)}`),
+  // v carries the file's mtime and size, so a changed file is a new URL and an unchanged one a cached one
+  fileThumbURL: (path: string, sudo: boolean, mtime: number, size: number) => apiPath(`/api/files/thumb?${q(path, sudo, `&v=${mtime}-${size}`)}`),
+  thumbStatus: (sudo: boolean, refresh = false) => req<ThumbStatus>('GET', `/api/files/thumbs?${sudo ? 'sudo=1&' : ''}${refresh ? 'refresh=1' : ''}`),
+  thumbInstall: () => req<TaskInfo>('POST', '/api/files/thumbs/install'),
+  thumbGPUAccess: () => req<TaskInfo>('POST', '/api/files/thumbs/gpu-access'),
+  // playback of what the browser can't play as it is: an HLS re-encode on the machine
+  playCaps: (sudo: boolean) => req<PlayCaps>('GET', `/api/files/play-caps${sudo ? '?sudo=1' : ''}`),
+  playStart: (path: string, codec: string, quality: string, sudo: boolean) => req<{ stream: PlayStream; url: string }>('POST', `/api/files/play${sudo ? '?sudo=1' : ''}`, { path, codec, quality }),
+  playStatus: (id: string) => req<PlayStatus>('GET', `/api/files/play/${id}`),
+  playStop: (id: string) => req<void>('DELETE', `/api/files/play/${id}`),
  fileWrite: async (path: string, text: string, sudo: boolean) => {
    const r = await fetch(apiPath(`/api/files/write?${q(path, sudo)}`), { method: 'PUT', credentials: 'same-origin', body: text, headers: { 'Content-Type': 'application/octet-stream' } })
    if (r.status === 401) throw new Unauthenticated()
@@ -303,6 +325,8 @@ export const api = {
  fileMkdir: (path: string, sudo: boolean) => req<void>('POST', `/api/files/mkdir${sudo ? '?sudo=1' : ''}`, { path }),
  fileTouch: (path: string, sudo: boolean) => req<void>('POST', `/api/files/touch${sudo ? '?sudo=1' : ''}`, { path }),
  fileRename: (path: string, to: string, sudo: boolean) => req<void>('POST', `/api/files/rename${sudo ? '?sudo=1' : ''}`, { path, to }),
+  // a rename when the ends share a filesystem (nothing back), otherwise the copy-and-remove runs as a task (the task back)
+  fileMove: (path: string, to: string, sudo: boolean) => req<TaskInfo | undefined>('POST', `/api/files/move${sudo ? '?sudo=1' : ''}`, { path, to }),
  fileDelete: (path: string, recursive: boolean, sudo: boolean) => req<void>('POST', `/api/files/delete${sudo ? '?sudo=1' : ''}`, { path, recursive }),
  fileChmod: (path: string, mode: string, sudo: boolean) => req<void>('POST', `/api/files/chmod${sudo ? '?sudo=1' : ''}`, { path, mode }),
  storage: () => req<{ devices: StorageDevice[]; zfs: ZFSInfo; smartctl: boolean }>('GET', '/api/storage'),
@@ -437,6 +461,22 @@ export const api = {
  virtConfig: (name: string, cfg: Record<string, string>) => req<void>('PUT', `/api/virt/instances/${encodeURIComponent(name)}/config`, cfg),
  virtSnapshot: (name: string, snap: string) => req<{ name: string }>('POST', `/api/virt/instances/${encodeURIComponent(name)}/snapshots`, { name: snap }),
  virtSnapshotAction: (name: string, snap: string, action: 'restore' | 'delete') => req<void>('POST', `/api/virt/instances/${encodeURIComponent(name)}/snapshots/${encodeURIComponent(snap)}/${action}`),
+  virtISOFetch: (url: string, sha256: string, name: string) => req<TaskInfo>('POST', '/api/virt/isos/fetch', { url, sha256, name }),
+  virtISOImport: (path: string) => req<TaskInfo>('POST', '/api/virt/isos/import', { path }),
+  virtISODelete: (name: string) => req<void>('POST', '/api/virt/isos/delete', { name }),
+  virtISORename: (name: string, to: string) => req<void>('POST', '/api/virt/isos/rename', { name, to }),
+  virtISOAttach: (inst: string, iso: string, bootFirst: boolean) => req<{ device: string }>('POST', `/api/virt/instances/${encodeURIComponent(inst)}/iso`, { iso, boot_first: bootFirst }),
+  virtISODetach: (inst: string, device: string) => req<void>('POST', `/api/virt/instances/${encodeURIComponent(inst)}/iso/detach`, { device }),
+  virtFromISO: (f: FromISO) => req<TaskInfo>('POST', '/api/virt/instances/from-iso', f),
+  virtMountAdd: (inst: string, m: { device: string; source: string; path: string; readonly: boolean; shift: boolean }) => req<{ device: string }>('POST', `/api/virt/instances/${encodeURIComponent(inst)}/mounts`, m),
+  virtMountRemove: (inst: string, device: string) => req<void>('POST', `/api/virt/instances/${encodeURIComponent(inst)}/mounts/remove`, { device }),
+  virtExports: () => req<ExportsView>('GET', '/api/virt/exports'),
+  virtExportsPut: (c: ExportConfig) => req<void>('PUT', '/api/virt/exports', c),
+  virtExportsRun: (instance = '') => req<TaskInfo>('POST', '/api/virt/exports/run', { instance }),
+  virtExportDelete: (instance: string, name: string) => req<void>('POST', '/api/virt/exports/delete', { instance, name }),
+  virtSSHKeys: () => req<{ keys: string[]; user: string }>('GET', '/api/virt/sshkeys'),
+  virtPoolCreate: (name: string, path: string) => req<{ name: string; path: string }>('POST', '/api/virt/pools', { name, path }),
+  virtPoolDelete: (name: string) => req<void>('POST', '/api/virt/pools/delete', { name }),
 }

 export function wsURLPath(path: string): string {
@@ -364,8 +364,44 @@ h2.section { margin: 0; font-size: 13px; font-weight: 600; color: var(--muted);
 .file-editor { flex: 1; min-height: 0; border: 0; border-radius: 0; resize: none; font-size: 13px; }
 .preview { flex: 1; display: flex; align-items: center; justify-content: center; overflow: auto; padding: 12px; }
 .preview img { max-width: 100%; max-height: 100%; object-fit: contain; }
+.preview video { max-width: 100%; max-height: 100%; background: #000; border-radius: 4px; outline: none; }
+.player { flex: 1; min-height: 0; display: flex; flex-direction: column; }
+.player .preview { flex: 1; min-height: 0; }
+.play-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; padding: 6px 12px; font-size: 12px; color: var(--muted); border-bottom: 1px solid var(--border); }
+.play-bar select { padding: 4px 8px; background: var(--bg); border: 1px solid var(--border); border-radius: 5px; color: var(--fg); font-size: 12px; }
+.play-pick { margin: 12px; }
+.play-pick .row { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin-top: 10px; }
+.play-pick label { display: flex; align-items: center; gap: 6px; font-size: 12px; color: var(--muted); }
+.preview.audio { align-items: flex-start; }
+.audio-box { display: flex; flex-direction: column; align-items: center; gap: 10px; width: min(560px, 100%); margin-top: 8vh; }
+.audio-box .ficon { font-size: 48px; }
+.audio-box audio { width: 100%; }
+/* previews: the icon column becomes a thumbnail box for images and videos */
+.file-list.thumbs .file-row { grid-template-columns: 72px 1fr 80px 80px 130px 32px; padding-top: 4px; padding-bottom: 4px; min-height: 52px; }
+.fthumb { position: relative; width: 72px; height: 44px; display: flex; align-items: center; justify-content: center; background: var(--bg3); border-radius: 4px; overflow: hidden; }
+.fthumb img { max-width: 100%; max-height: 100%; object-fit: contain; display: block; }
+.fthumb.video::after, .fthumb.audio::after { content: '▶'; position: absolute; right: 2px; bottom: 2px; font-size: 9px; line-height: 1; padding: 2px 3px; border-radius: 3px; background: rgba(0,0,0,.6); color: #fff; }
+.fthumb.audio::after { content: '♪'; }
+.fthumb .ficon { font-size: 18px; }
+.thumb-note { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; margin: 6px 10px 0; }
+/* move: the folder picker */
+.modal.mover { width: min(560px, 100%); height: min(76vh, 100%); overflow: hidden; }
+.mover-nav { display: flex; align-items: center; gap: 2px; }
+.mover-nav .icon-btn { font-size: 18px; min-width: 30px; line-height: 1; }
+.mover-nav .icon-btn:disabled { opacity: .3; }
+.mover-nav .crumbs { flex: 1; min-width: 0; margin-left: 4px; }
+.modal.mover > .mover-list { flex: 1 1 auto; min-height: 80px; overflow-y: auto; margin: 0 -16px; border-top: 1px solid var(--border); }
+.mover-row { display: flex; align-items: center; gap: 8px; padding: 9px 16px; cursor: pointer; border-bottom: 1px solid var(--border); min-height: 38px; }
+.mover-row:hover { background: var(--bg3); }
+.mover-row.self { opacity: .5; cursor: default; }
+.mover-row .fname { flex: 1; }
+.mover-dest { overflow-wrap: anywhere; }
+.thumb-note .btn { padding-top: 3px; padding-bottom: 3px; }
+.files-bar .task-out { margin: 6px 10px 0; max-height: 160px; }
@media (max-width: 800px) {
  .file-row { grid-template-columns: 24px 1fr 70px 32px; } .file-row .fmeta:nth-child(4), .file-row .perm { display: none; }
+  .file-list.thumbs .file-row { grid-template-columns: 60px 1fr 70px 32px; min-height: 46px; }
+  .fthumb { width: 60px; height: 38px; }
  .path-input { width: 100%; margin: 4px 0 0; }
  .files-tools .filter { width: 80px; }
 }
@@ -900,5 +936,15 @@ pre.diff .add { color: var(--ok); background: color-mix(in srgb, var(--ok) 12%,
 .virt-pick .svc-row { padding: 6px 10px; }
 .virt-kv { display: grid; grid-template-columns: max-content 1fr; gap: 2px 12px; font-size: 12px; word-break: break-all; }
 .virt-form-row { display: flex; gap: 8px; }
-.virt-form-row > label { flex: 1; min-width: 0; }
+.virt-form-row > label { flex: 1; min-width: 0; display: flex; flex-direction: column; gap: 4px; }
+.virt-form-row > label > input, .virt-form-row > label > select { width: 100%; box-sizing: border-box; }
 .virt .modal { max-width: 640px; }
+.vga-back { align-items: stretch; padding: 10px; }
+.vga { display: flex; flex-direction: column; gap: 6px; width: 100%; height: 100%; max-width: none; max-height: none; background: var(--bg); border: 1px solid var(--border); border-radius: 8px; padding: 8px; }
+.vga-bar { flex-shrink: 0; }
+.vga-area { flex: 1; min-height: 0; overflow: auto; background: #000; border-radius: 6px; display: flex; align-items: flex-start; justify-content: flex-start; padding: 4px; }
+.vga-area #spice-area { display: inline-block; }
+.vga-area #spice-screen { display: inline-block; line-height: 0; }
+.vga-area canvas { outline: none; }
+.vga-msg { display: none; }
+.vga-hint { flex-shrink: 0; }
@@ -0,0 +1,674 @@
+                    GNU GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
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+WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
+THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
+GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
+USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
+DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
+PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
+EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
+SUCH DAMAGES.
+
+  17. Interpretation of Sections 15 and 16.
+
+  If the disclaimer of warranty and limitation of liability provided
+above cannot be given local legal effect according to their terms,
+reviewing courts shall apply local law that most closely approximates
+an absolute waiver of all civil liability in connection with the
+Program, unless a warranty or assumption of liability accompanies a
+copy of the Program in return for a fee.
+
+                     END OF TERMS AND CONDITIONS
+
+            How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+state the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+Also add information on how to contact you by electronic and paper mail.
+
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
+
+    <program>  Copyright (C) <year>  <name of author>
+    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
+The hypothetical commands `show w' and `show c' should show the appropriate
+parts of the General Public License.  Of course, your program's commands
+might be different; for a GUI interface, you would use an "about box".
+
+  You should also get your employer (if you work as a programmer) or school,
+if any, to sign a "copyright disclaimer" for the program, if necessary.
+For more information on this, and how to apply and follow the GNU GPL, see
+<http://www.gnu.org/licenses/>.
+
+  The GNU General Public License does not permit incorporating your program
+into proprietary programs.  If your program is a subroutine library, you
+may consider it more useful to permit linking proprietary applications with
+the library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.  But first, please read
+<http://www.gnu.org/philosophy/why-not-lgpl.html>.
@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <http://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
+
+  "The Library" refers to a covered work governed by this License,
+other than an Application or a Combined Work as defined below.
+
+  An "Application" is any work that makes use of an interface provided
+by the Library, but which is not otherwise based on the Library.
+Defining a subclass of a class defined by the Library is deemed a mode
+of using an interface provided by the Library.
+
+  A "Combined Work" is a work produced by combining or linking an
+Application with the Library.  The particular version of the Library
+with which the Combined Work was made is also called the "Linked
+Version".
+
+  The "Minimal Corresponding Source" for a Combined Work means the
+Corresponding Source for the Combined Work, excluding any source code
+for portions of the Combined Work that, considered in isolation, are
+based on the Application, and not on the Linked Version.
+
+  The "Corresponding Application Code" for a Combined Work means the
+object code and/or source code for the Application, including any data
+and utility programs needed for reproducing the Combined Work from the
+Application, but excluding the System Libraries of the Combined Work.
+
+  1. Exception to Section 3 of the GNU GPL.
+
+  You may convey a covered work under sections 3 and 4 of this License
+without being bound by section 3 of the GNU GPL.
+
+  2. Conveying Modified Versions.
+
+  If you modify a copy of the Library, and, in your modifications, a
+facility refers to a function or data to be supplied by an Application
+that uses the facility (other than as an argument passed when the
+facility is invoked), then you may convey a copy of the modified
+version:
+
+   a) under this License, provided that you make a good faith effort to
+   ensure that, in the event an Application does not supply the
+   function or data, the facility still operates, and performs
+   whatever part of its purpose remains meaningful, or
+
+   b) under the GNU GPL, with none of the additional permissions of
+   this License applicable to that copy.
+
+  3. Object Code Incorporating Material from Library Header Files.
+
+  The object code form of an Application may incorporate material from
+a header file that is part of the Library.  You may convey such object
+code under terms of your choice, provided that, if the incorporated
+material is not limited to numerical parameters, data structure
+layouts and accessors, or small macros, inline functions and templates
+(ten or fewer lines in length), you do both of the following:
+
+   a) Give prominent notice with each copy of the object code that the
+   Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the object code with a copy of the GNU GPL and this license
+   document.
+
+  4. Combined Works.
+
+  You may convey a Combined Work under terms of your choice that,
+taken together, effectively do not restrict modification of the
+portions of the Library contained in the Combined Work and reverse
+engineering for debugging such modifications, if you also do each of
+the following:
+
+   a) Give prominent notice with each copy of the Combined Work that
+   the Library is used in it and that the Library and its use are
+   covered by this License.
+
+   b) Accompany the Combined Work with a copy of the GNU GPL and this license
+   document.
+
+   c) For a Combined Work that displays copyright notices during
+   execution, include the copyright notice for the Library among
+   these notices, as well as a reference directing the user to the
+   copies of the GNU GPL and this license document.
+
+   d) Do one of the following:
+
+       0) Convey the Minimal Corresponding Source under the terms of this
+       License, and the Corresponding Application Code in a form
+       suitable for, and under terms that permit, the user to
+       recombine or relink the Application with a modified version of
+       the Linked Version to produce a modified Combined Work, in the
+       manner specified by section 6 of the GNU GPL for conveying
+       Corresponding Source.
+
+       1) Use a suitable shared library mechanism for linking with the
+       Library.  A suitable mechanism is one that (a) uses at run time
+       a copy of the Library already present on the user's computer
+       system, and (b) will operate properly with a modified version
+       of the Library that is interface-compatible with the Linked
+       Version.
+
+   e) Provide Installation Information, but only if you would otherwise
+   be required to provide such information under section 6 of the
+   GNU GPL, and only to the extent that such information is
+   necessary to install and execute a modified version of the
+   Combined Work produced by recombining or relinking the
+   Application with a modified version of the Linked Version. (If
+   you use option 4d0, the Installation Information must accompany
+   the Minimal Corresponding Source and Corresponding Application
+   Code. If you use option 4d1, you must provide the Installation
+   Information in the manner specified by section 6 of the GNU GPL
+   for conveying Corresponding Source.)
+
+  5. Combined Libraries.
+
+  You may place library facilities that are a work based on the
+Library side by side in a single library together with other library
+facilities that are not Applications and are not covered by this
+License, and convey such a combined library under terms of your
+choice, if you do both of the following:
+
+   a) Accompany the combined library with a copy of the same work based
+   on the Library, uncombined with any other library facilities,
+   conveyed under the terms of this License.
+
+   b) Give prominent notice with the combined library that part of it
+   is a work based on the Library, and explaining where to find the
+   accompanying uncombined form of the same work.
+
+  6. Revised Versions of the GNU Lesser General Public License.
+
+  The Free Software Foundation may publish revised and/or new versions
+of the GNU Lesser General Public License from time to time. Such new
+versions will be similar in spirit to the present version, but may
+differ in detail to address new problems or concerns.
+
+  Each version is given a distinguishing version number. If the
+Library as you received it specifies that a certain numbered version
+of the GNU Lesser General Public License "or any later version"
+applies to it, you have the option of following the terms and
+conditions either of that published version or of any later version
+published by the Free Software Foundation. If the Library as you
+received it does not specify a version number of the GNU Lesser
+General Public License, you may choose any version of the GNU Lesser
+General Public License ever published by the Free Software Foundation.
+
+  If the Library as you received it specifies that a proxy can decide
+whether future versions of the GNU Lesser General Public License shall
+apply, that proxy's public statement of acceptance of any version is
+permanent authorization for you to choose that version for the
+Library.
@@ -0,0 +1,16 @@
+# spice-html5, vendored
+
+Upstream: https://gitlab.freedesktop.org/spice/spice-html5 — commit b372aab (2026-09-21),
+copied unchanged on 2026-10-09 (`src/`, `thirdparty/`). LGPL-3.0-or-later; the
+licence text is beside this file. It draws a VM's SPICE display into a canvas from a websocket
+carrying the raw SPICE stream — which is what Incus's VGA console websocket is — so Ham Lab's
+daemon bridges the two and this does the rest. Loaded lazily by `VgaConsole.tsx`, so the main
+bundle does not carry it. Not on npm in a current form (the `@spice-project/spice-html5`
+package stopped at 0.2.1 in 2019), hence the copy.
+
+Upstream's `spice.css` is deliberately **not** here. It is the stylesheet of spice-html5's
+demo page, with rules for `body`, `*`, `button` and `canvas` that apply to the whole
+document. It was copied and imported on 2026-10-09 and turned every button in Ham Lab into
+a gradient pill shifted off its place (v0.1.0-188 to -191). The console is styled by the
+`.vga` rules in `src/styles.css`; `scripts/test-css-imports.mjs` fails on any new
+stylesheet import that has not been looked at.
@@ -0,0 +1,189 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Aric Stewart <aric@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+/*
+ * Copyright 1990,91 by Thomas Roell, Dinkelscherben, Germany.
+ *
+ * Permission to use, copy, modify, distribute, and sell this software and its
+ * documentation for any purpose is hereby granted without fee, provided that
+ * the above copyright notice appear in all copies and that both that
+ * copyright notice and this permission notice appear in supporting
+ * documentation, and that the name of Thomas Roell not be used in
+ * advertising or publicity pertaining to distribution of the software without
+ * specific, written prior permission.  Thomas Roell makes no representations
+ * about the suitability of this software for any purpose.  It is provided
+ * "as is" without express or implied warranty.
+ *
+ * THOMAS ROELL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
+ * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
+ * EVENT SHALL THOMAS ROELL BE LIABLE FOR ANY SPECIAL, INDIRECT OR
+ * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
+ * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
+ * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
+ * PERFORMANCE OF THIS SOFTWARE.
+ *
+ */
+/*
+ * Copyright (c) 1994-2003 by The XFree86 Project, Inc.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
+ * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
+ * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of the copyright holder(s)
+ * and author(s) shall not be used in advertising or otherwise to promote
+ * the sale, use or other dealings in this Software without prior written
+ * authorization from the copyright holder(s) and author(s).
+ */
+
+/*
+ * NOTE: The AT/MF keyboards can generate (via the 8042) two (MF: three)
+ *       sets of scancodes. Set3 can only be generated by a MF keyboard.
+ *       Set2 sends a makecode for keypress, and the same code prefixed by a
+ *       F0 for keyrelease. This is a little bit ugly to handle. Thus we use
+ *       here for X386 the PC/XT compatible Set1. This set uses 8bit scancodes.
+ *       Bit 7 ist set if the key is released. The code E0 switches to a
+ *       different meaning to add the new MF cursorkeys, while not breaking old
+ *       applications. E1 is another special prefix. Since I assume that there
+ *       will be further versions of PC/XT scancode compatible keyboards, we
+ *       may be in trouble one day.
+ *
+ * IDEA: 1) Use Set2 on AT84 keyboards and translate it to MF Set3.
+ *       2) Use the keyboards native set and translate it to common keysyms.
+ */
+
+
+var KeyNames = {
+/*
+ * definition of the AT84/MF101/MF102 Keyboard:
+ * ============================================================
+ *       Defined             Key Cap Glyphs       Pressed value
+ *      Key Name            Main       Also       (hex)    (dec)
+ *      ----------------   ---------- -------    ------    ------
+ */
+  KEY_Escape      :/* Escape                0x01  */    1,
+  KEY_1           :/* 1           !         0x02  */    2,
+  KEY_2           :/* 2           @         0x03  */    3,
+  KEY_3           :/* 3           #         0x04  */    4,
+  KEY_4           :/* 4           $         0x05  */    5,
+  KEY_5           :/* 5           %         0x06  */    6,
+  KEY_6           :/* 6           ^         0x07  */    7,
+  KEY_7           :/* 7           &         0x08  */    8,
+  KEY_8           :/* 8           *         0x09  */    9,
+  KEY_9           :/* 9           (         0x0a  */   10,
+  KEY_0           :/* 0           )         0x0b  */   11,
+  KEY_Minus       :/* - (Minus)   _ (Under) 0x0c  */   12,
+  KEY_Equal       :/* = (Equal)   +         0x0d  */   13,
+  KEY_BackSpace   :/* Back Space            0x0e  */   14,
+  KEY_Tab         :/* Tab                   0x0f  */   15,
+  KEY_Q           :/* Q                     0x10  */   16,
+  KEY_W           :/* W                     0x11  */   17,
+  KEY_E           :/* E                     0x12  */   18,
+  KEY_R           :/* R                     0x13  */   19,
+  KEY_T           :/* T                     0x14  */   20,
+  KEY_Y           :/* Y                     0x15  */   21,
+  KEY_U           :/* U                     0x16  */   22,
+  KEY_I           :/* I                     0x17  */   23,
+  KEY_O           :/* O                     0x18  */   24,
+  KEY_P           :/* P                     0x19  */   25,
+  KEY_LBrace      :/* [           {         0x1a  */   26,
+  KEY_RBrace      :/* ]           }         0x1b  */   27,
+  KEY_Enter       :/* Enter                 0x1c  */   28,
+  KEY_LCtrl       :/* Ctrl(left)            0x1d  */   29,
+  KEY_A           :/* A                     0x1e  */   30,
+  KEY_S           :/* S                     0x1f  */   31,
+  KEY_D           :/* D                     0x20  */   32,
+  KEY_F           :/* F                     0x21  */   33,
+  KEY_G           :/* G                     0x22  */   34,
+  KEY_H           :/* H                     0x23  */   35,
+  KEY_J           :/* J                     0x24  */   36,
+  KEY_K           :/* K                     0x25  */   37,
+  KEY_L           :/* L                     0x26  */   38,
+  KEY_SemiColon   :/* ;(SemiColon) :(Colon) 0x27  */   39,
+  KEY_Quote       :/* ' (Apostr)  " (Quote) 0x28  */   40,
+  KEY_Tilde       :/* ` (Accent)  ~ (Tilde) 0x29  */   41,
+  KEY_ShiftL      :/* Shift(left)           0x2a  */   42,
+  KEY_BSlash      :/* \(BckSlash) |(VertBar)0x2b  */   43,
+  KEY_Z           :/* Z                     0x2c  */   44,
+  KEY_X           :/* X                     0x2d  */   45,
+  KEY_C           :/* C                     0x2e  */   46,
+  KEY_V           :/* V                     0x2f  */   47,
+  KEY_B           :/* B                     0x30  */   48,
+  KEY_N           :/* N                     0x31  */   49,
+  KEY_M           :/* M                     0x32  */   50,
+  KEY_Comma       :/* , (Comma)   < (Less)  0x33  */   51,
+  KEY_Period      :/* . (Period)  >(Greater)0x34  */   52,
+  KEY_Slash       :/* / (Slash)   ?         0x35  */   53,
+  KEY_ShiftR      :/* Shift(right)          0x36  */   54,
+  KEY_KP_Multiply :/* *                     0x37  */   55,
+  KEY_Alt         :/* Alt(left)             0x38  */   56,
+  KEY_Space       :/*   (SpaceBar)          0x39  */   57,
+  KEY_CapsLock    :/* CapsLock              0x3a  */   58,
+  KEY_F1          :/* F1                    0x3b  */   59,
+  KEY_F2          :/* F2                    0x3c  */   60,
+  KEY_F3          :/* F3                    0x3d  */   61,
+  KEY_F4          :/* F4                    0x3e  */   62,
+  KEY_F5          :/* F5                    0x3f  */   63,
+  KEY_F6          :/* F6                    0x40  */   64,
+  KEY_F7          :/* F7                    0x41  */   65,
+  KEY_F8          :/* F8                    0x42  */   66,
+  KEY_F9          :/* F9                    0x43  */   67,
+  KEY_F10         :/* F10                   0x44  */   68,
+  KEY_NumLock     :/* NumLock               0x45  */   69,
+  KEY_ScrollLock  :/* ScrollLock            0x46  */   70,
+  KEY_KP_7        :/* 7           Home      0x47  */   71,
+  KEY_KP_8        :/* 8           Up        0x48  */   72,
+  KEY_KP_9        :/* 9           PgUp      0x49  */   73,
+  KEY_KP_Minus    :/* - (Minus)             0x4a  */   74,
+  KEY_KP_4        :/* 4           Left      0x4b  */   75,
+  KEY_KP_5        :/* 5                     0x4c  */   76,
+  KEY_KP_6        :/* 6           Right     0x4d  */   77,
+  KEY_KP_Plus     :/* + (Plus)              0x4e  */   78,
+  KEY_KP_1        :/* 1           End       0x4f  */   79,
+  KEY_KP_2        :/* 2           Down      0x50  */   80,
+  KEY_KP_3        :/* 3           PgDown    0x51  */   81,
+  KEY_KP_0        :/* 0           Insert    0x52  */   82,
+  KEY_KP_Decimal  :/* . (Decimal) Delete    0x53  */   83,
+  KEY_SysRequest  :/* SysRequest            0x54  */   84,
+                   /* NOTUSED               0x55  */
+  KEY_Less        :/* < (Less)   >(Greater) 0x56  */   86,
+  KEY_F11         :/* F11                   0x57  */   87,
+  KEY_F12         :/* F12                   0x58  */   88,
+
+  KEY_Prefix0     :/* special               0x60  */   96,
+  KEY_Prefix1     :/* specail               0x61  */   97,
+};
+
+export {
+  KeyNames,
+};
@@ -0,0 +1,64 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+/*----------------------------------------------------------------------------
+**  bitmap.js
+**      Handle SPICE_IMAGE_TYPE_BITMAP
+**--------------------------------------------------------------------------*/
+
+import { Constants } from './enums.js';
+
+/* A 32-bit source pixel is B, G, R, A in memory. Read it as a little-endian
+   word, A R G B, rotate it left by eight to R G B A and store that word
+   big-endian, so the bytes land in the R, G, B, A order ImageData wants: one
+   load, one store and two shifts per pixel. A DataView takes either host
+   byte order and any alignment. Only 32BIT and RGBA are handled; 32BIT
+   ignores the source's high byte and is fully opaque. */
+function convert_spice_bitmap_to_web(context, spice_bitmap)
+{
+    if (spice_bitmap.format != Constants.SPICE_BITMAP_FMT_32BIT &&
+        spice_bitmap.format != Constants.SPICE_BITMAP_FMT_RGBA)
+        return undefined;
+
+    const w = spice_bitmap.x;
+    const h = spice_bitmap.y;
+    const stride = spice_bitmap.stride;
+    const ret = context.createImageData(w, h);
+    const opaque = spice_bitmap.format == Constants.SPICE_BITMAP_FMT_32BIT;
+    const top_down = spice_bitmap.flags & Constants.SPICE_BITMAP_FLAGS_TOP_DOWN;
+    const src = new DataView(spice_bitmap.data);
+    const dest = new DataView(ret.data.buffer);
+    let d = 0;
+    for (let y = 0; y < h; y++)
+    {
+        let s = (top_down ? y : h - 1 - y) * stride;
+        for (let x = 0; x < w; x++, d += 4, s += 4)
+        {
+            const v = src.getUint32(s, true);
+            dest.setUint32(d, (v << 8) | (opaque ? 0xff : v >>> 24), false);
+        }
+    }
+    return ret;
+}
+
+export {
+  convert_spice_bitmap_to_web,
+};
@@ -0,0 +1,149 @@
+/*
+ * @see https://developer.mozilla.org/en-US/docs/Web/API/UI_Events/Keyboard_event_code_values
+ */
+export const code_to_scancode = [];
+code_to_scancode["Escape"]                    = 0x01;
+code_to_scancode["Digit1"]                    = 0x02;
+code_to_scancode["Digit2"]                    = 0x03;
+code_to_scancode["Digit3"]                    = 0x04;
+code_to_scancode["Digit4"]                    = 0x05;
+code_to_scancode["Digit5"]                    = 0x06;
+code_to_scancode["Digit6"]                    = 0x07;
+code_to_scancode["Digit7"]                    = 0x08;
+code_to_scancode["Digit8"]                    = 0x09;
+code_to_scancode["Digit9"]                    = 0x0A;
+code_to_scancode["Digit0"]                    = 0x0B;
+code_to_scancode["Minus"]                     = 0x0C;
+code_to_scancode["Equal"]                     = 0x0D;
+code_to_scancode["Backspace"]                 = 0x0E;
+code_to_scancode["Tab"]                       = 0x0F;
+code_to_scancode["KeyQ"]                      = 0x10;
+code_to_scancode["KeyW"]                      = 0x11;
+code_to_scancode["KeyE"]                      = 0x12;
+code_to_scancode["KeyR"]                      = 0x13;
+code_to_scancode["KeyT"]                      = 0x14;
+code_to_scancode["KeyY"]                      = 0x15;
+code_to_scancode["KeyU"]                      = 0x16;
+code_to_scancode["KeyI"]                      = 0x17;
+code_to_scancode["KeyO"]                      = 0x18;
+code_to_scancode["KeyP"]                      = 0x19;
+code_to_scancode["BracketLeft"]               = 0x1A;
+code_to_scancode["BracketRight"]              = 0x1B;
+code_to_scancode["Enter"]                     = 0x1C;
+code_to_scancode["ControlLeft"]               = 0x1D;
+code_to_scancode["KeyA"]                      = 0x1E;
+code_to_scancode["KeyS"]                      = 0x1F;
+code_to_scancode["KeyD"]                      = 0x20;
+code_to_scancode["KeyF"]                      = 0x21;
+code_to_scancode["KeyG"]                      = 0x22;
+code_to_scancode["KeyH"]                      = 0x23;
+code_to_scancode["KeyJ"]                      = 0x24;
+code_to_scancode["KeyK"]                      = 0x25;
+code_to_scancode["KeyL"]                      = 0x26;
+code_to_scancode["Semicolon"]                 = 0x27;
+code_to_scancode["Quote"]                     = 0x28;
+code_to_scancode["Backquote"]                 = 0x29;
+code_to_scancode["ShiftLeft"]                 = 0x2A;
+code_to_scancode["Backslash"]                 = 0x2B;
+code_to_scancode["KeyZ"]                      = 0x2C;
+code_to_scancode["KeyX"]                      = 0x2D;
+code_to_scancode["KeyC"]                      = 0x2E;
+code_to_scancode["KeyV"]                      = 0x2F;
+code_to_scancode["KeyB"]                      = 0x30;
+code_to_scancode["KeyN"]                      = 0x31;
+code_to_scancode["KeyM"]                      = 0x32;
+code_to_scancode["Comma"]                     = 0x33;
+code_to_scancode["Period"]                    = 0x34;
+code_to_scancode["Slash"]                     = 0x35;
+code_to_scancode["ShiftRight"]                = 0x36;
+code_to_scancode["NumpadMultiply"]            = 0x37;
+code_to_scancode["AltLeft"]                   = 0x38;
+code_to_scancode["Space"]                     = 0x39;
+code_to_scancode["CapsLock"]                  = 0x3A;
+code_to_scancode["F1"]                        = 0x3B;
+code_to_scancode["F2"]                        = 0x3C;
+code_to_scancode["F3"]                        = 0x3D;
+code_to_scancode["F4"]                        = 0x3E;
+code_to_scancode["F5"]                        = 0x3F;
+code_to_scancode["F6"]                        = 0x40;
+code_to_scancode["F7"]                        = 0x41;
+code_to_scancode["F8"]                        = 0x42;
+code_to_scancode["F9"]                        = 0x43;
+code_to_scancode["F10"]                       = 0x44;
+code_to_scancode["Pause"]                     = 0x45;
+code_to_scancode["ScrollLock"]                = 0x46;
+code_to_scancode["Numpad7"]                   = 0x47;
+code_to_scancode["Numpad8"]                   = 0x48;
+code_to_scancode["Numpad9"]                   = 0x49;
+code_to_scancode["NumpadSubtract"]            = 0x4A;
+code_to_scancode["Numpad4"]                   = 0x4B;
+code_to_scancode["Numpad5"]                   = 0x4C;
+code_to_scancode["Numpad6"]                   = 0x4D;
+code_to_scancode["NumpadAdd"]                 = 0x4E;
+code_to_scancode["Numpad1"]                   = 0x4F;
+code_to_scancode["Numpad2"]                   = 0x50;
+code_to_scancode["Numpad3"]                   = 0x51;
+code_to_scancode["Numpad0"]                   = 0x52;
+code_to_scancode["NumpadDecimal"]             = 0x53;
+code_to_scancode["PrintScreen"]               = 0x54;
+code_to_scancode["IntlBackslash"]             = 0x56;
+code_to_scancode["F11"]                       = 0x57;
+code_to_scancode["F12"]                       = 0x58;
+code_to_scancode["NumpadEqual"]               = 0x59;
+code_to_scancode["F13"]                       = 0x64;
+code_to_scancode["F14"]                       = 0x65;
+code_to_scancode["F15"]                       = 0x66;
+code_to_scancode["F16"]                       = 0x67;
+code_to_scancode["F17"]                       = 0x68;
+code_to_scancode["F18"]                       = 0x69;
+code_to_scancode["F19"]                       = 0x6A;
+code_to_scancode["F20"]                       = 0x6B;
+code_to_scancode["F21"]                       = 0x6C;
+code_to_scancode["F22"]                       = 0x6D;
+code_to_scancode["F23"]                       = 0x6E;
+code_to_scancode["KanaMode"]                  = 0x70;
+code_to_scancode["IntlRo"]                    = 0x73;
+code_to_scancode["F24"]                       = 0x76;
+code_to_scancode["Convert"]                   = 0x79;
+code_to_scancode["NonConvert"]                = 0x7B;
+code_to_scancode["IntlYen"]                   = 0x7D;
+code_to_scancode["NumpadComma"]               = 0x7E;
+code_to_scancode["MediaTrackPrevious"]        = 0xE0 | (0x10 << 8);
+code_to_scancode["MediaTrackNext"]            = 0xE0 | (0x19 << 8);
+code_to_scancode["NumpadEnter"]               = 0xE0 | (0x1C << 8);
+code_to_scancode["ControlRight"]              = 0xE0 | (0x1D << 8);
+code_to_scancode["AudioVolumeMute"]           = 0xE0 | (0x20 << 8);
+code_to_scancode["LaunchApp2"]                = 0xE0 | (0x21 << 8);
+code_to_scancode["MediaPlayPause"]            = 0xE0 | (0x22 << 8);
+code_to_scancode["MediaStop"]                 = 0xE0 | (0x24 << 8);
+code_to_scancode["VolumeDown"]                = 0xE0 | (0x2E << 8);
+code_to_scancode["VolumeUp"]                  = 0xE0 | (0x30 << 8);
+code_to_scancode["BrowserHome"]               = 0xE0 | (0x32 << 8);
+code_to_scancode["NumpadDivide"]              = 0xE0 | (0x35 << 8);
+code_to_scancode["PrintScreen"]               = 0xE0 | (0x37 << 8);
+code_to_scancode["AltRight"]                  = 0xE0 | (0x38 << 8);
+code_to_scancode["NumLock"]                   = 0xE0 | (0x45 << 8);
+code_to_scancode["Pause"]                     = 0xE0 | (0x46 << 8);
+code_to_scancode["Home"]                      = 0xE0 | (0x47 << 8);
+code_to_scancode["ArrowUp"]                   = 0xE0 | (0x48 << 8);
+code_to_scancode["PageUp"]                    = 0xE0 | (0x49 << 8);
+code_to_scancode["ArrowLeft"]                 = 0xE0 | (0x4B << 8);
+code_to_scancode["ArrowRight"]                = 0xE0 | (0x4D << 8);
+code_to_scancode["End"]                       = 0xE0 | (0x4F << 8);
+code_to_scancode["ArrowDown"]                 = 0xE0 | (0x50 << 8);
+code_to_scancode["PageDown"]                  = 0xE0 | (0x51 << 8);
+code_to_scancode["Insert"]                    = 0xE0 | (0x52 << 8);
+code_to_scancode["Delete"]                    = 0xE0 | (0x53 << 8);
+code_to_scancode["MetaLeft"]                  = 0xE0 | (0x5B << 8);
+code_to_scancode["MetaRight"]                 = 0xE0 | (0x5C << 8);
+code_to_scancode["ContextMenu"]               = 0xE0 | (0x5D << 8);
+code_to_scancode["Power"]                     = 0xE0 | (0x5E << 8);
+code_to_scancode["BrowserSearch"]             = 0xE0 | (0x65 << 8);
+code_to_scancode["BrowserFavorites"]          = 0xE0 | (0x66 << 8);
+code_to_scancode["BrowserRefresh"]            = 0xE0 | (0x67 << 8);
+code_to_scancode["BrowserStop"]               = 0xE0 | (0x68 << 8);
+code_to_scancode["BrowserForward"]            = 0xE0 | (0x69 << 8);
+code_to_scancode["BrowserBack"]               = 0xE0 | (0x6A << 8);
+code_to_scancode["LaunchApp1"]                = 0xE0 | (0x6B << 8);
+code_to_scancode["LaunchMail"]                = 0xE0 | (0x6C << 8);
+code_to_scancode["MediaSelect"]               = 0xE0 | (0x6D << 8);
@@ -0,0 +1,317 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import { create_rgba_png } from './png.js';
+import { Constants } from './enums.js';
+import { DEBUG } from './utils.js';
+import {
+  SpiceMsgCursorInit,
+  SpiceMsgCursorMove,
+  SpiceMsgCursorSet,
+} from './spicemsg.js';
+import { SpiceSimulateCursor } from './simulatecursor.js';
+import { SpiceConn } from './spiceconn.js';
+
+/*----------------------------------------------------------------------------
+**  SpiceCursorConn
+**      Drive the Spice Cursor Channel
+**--------------------------------------------------------------------------*/
+function SpiceCursorConn()
+{
+    SpiceConn.apply(this, arguments);
+}
+
+/* The largest cursor image Chromium and Firefox will show. */
+var MAX_CSS_CURSOR = 128;
+
+SpiceCursorConn.prototype = Object.create(SpiceConn.prototype);
+SpiceCursorConn.prototype.process_channel_message = function(msg)
+{
+    if (msg.type == Constants.SPICE_MSG_CURSOR_INIT)
+    {
+        var cursor_init = new SpiceMsgCursorInit(msg.data);
+        DEBUG > 1 && console.log("SpiceMsgCursorInit");
+        if (this.parent && this.parent.inputs &&
+            this.parent.inputs.mouse_mode == Constants.SPICE_MOUSE_MODE_SERVER)
+        {
+            // FIXME - this imagines that the server actually
+            //          provides the current cursor position,
+            //          instead of 0,0.  As of May 11, 2012,
+            //          that assumption was false :-(.
+            this.parent.inputs.mousex = cursor_init.position.x;
+            this.parent.inputs.mousey = cursor_init.position.y;
+        }
+        // FIXME - We don't handle most of the parameters here...
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_SET)
+    {
+        var cursor_set = new SpiceMsgCursorSet(msg.data);
+        DEBUG > 1 && console.log("SpiceMsgCursorSet");
+        if (cursor_set.cursor.flags & Constants.SPICE_CURSOR_FLAGS_NONE)
+        {
+            this.hide_cursor();
+            return true;
+        }
+
+        if (cursor_set.cursor.flags > 0)
+            this.log_warn("FIXME: No support for cursor flags " + cursor_set.cursor.flags);
+
+        /* An unconvertible shape is not an unhandled message: returning
+           false here made the base class log a second, misleading
+           "Unknown message type 103" for every one of these. */
+        if (! this.set_cursor(cursor_set.cursor))
+            this.warn_once_per_cursor_type(cursor_set.cursor.header.type);
+
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_MOVE)
+    {
+        /* Only meaningful under server mouse mode, where the server owns
+           the pointer position and we track it for inputs. Under client
+           mode the browser draws the pointer and already knows where it
+           is, so there is nothing to do -- but it is handled either way,
+           rather than reported as unimplemented on every move. */
+        var cursor_move = new SpiceMsgCursorMove(msg.data);
+        if (this.parent && this.parent.inputs &&
+            this.parent.inputs.mouse_mode == Constants.SPICE_MOUSE_MODE_SERVER)
+        {
+            this.parent.inputs.mousex = cursor_move.position.x;
+            this.parent.inputs.mousey = cursor_move.position.y;
+        }
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_HIDE)
+    {
+        DEBUG > 1 && console.log("SpiceMsgCursorHide");
+        this.hide_cursor();
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_TRAIL)
+    {
+        this.known_unimplemented(msg.type, "Cursor Trail");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_RESET)
+    {
+        DEBUG > 1 && console.log("SpiceMsgCursorReset");
+        document.getElementById(this.parent.screen_id).style.cursor = "auto";
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_INVAL_ONE)
+    {
+        this.known_unimplemented(msg.type, "Cursor Inval One");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_CURSOR_INVAL_ALL)
+    {
+        DEBUG > 1 && console.log("SpiceMsgCursorInvalAll");
+        // FIXME - There may be something useful to do here...
+        return true;
+    }
+
+    return false;
+}
+
+/* One warning per shape type per connection. Windows sends a cursor on
+   nearly every hover, so an unconvertible type used to produce an
+   unbounded stream of identical warnings. */
+SpiceCursorConn.prototype.warn_once_per_cursor_type = function(type)
+{
+    if (! this.warned_cursor_types)
+        this.warned_cursor_types = {};
+    if (this.warned_cursor_types[type])
+        return;
+    this.warned_cursor_types[type] = true;
+    this.log_warn("No support for cursor type " + type + "; leaving the cursor as it was.");
+}
+
+/* SPICE cursor shapes to the RGBA the PNG writer expects.
+   Returns null for a type we cannot convert.
+   Layouts follow spice-gtk's set_cursor() (src/channel-cursor.c). */
+function cursor_to_rgba(header, data)
+{
+    var width = header.width;
+    var height = header.height;
+    var pixels = width * height;
+    var u8 = new Uint8Array(data);
+    var rgba = new Uint8Array(pixels * 4);
+    var i, at;
+
+    /* SPICE ships 32bpp shapes as native-endian ARGB, which on every
+       platform we run on is B,G,R,A in memory; PNG wants R,G,B,A. The
+       swap is invisible on the black/white/transparent cursors that
+       dominate, which is why it went unnoticed, but colour cursors came
+       out with red and blue exchanged. */
+    if (header.type == Constants.SPICE_CURSOR_TYPE_ALPHA)
+    {
+        if (u8.length < pixels * 4)
+            return null;
+        for (i = 0, at = 0; i < pixels; i++, at += 4)
+        {
+            rgba[at]     = u8[at + 2];
+            rgba[at + 1] = u8[at + 1];
+            rgba[at + 2] = u8[at];
+            rgba[at + 3] = u8[at + 3];
+        }
+        return rgba;
+    }
+
+    /* Two 1bpp masks, AND then XOR, each row padded to a byte. The four
+       combinations are the classic ones:
+         AND=1 XOR=0  transparent
+         AND=1 XOR=1  invert the screen
+         AND=0 XOR=0  black
+         AND=0 XOR=1  white
+       A CSS cursor cannot invert what is under it, so those pixels are
+       drawn black -- the same choice every other HTML SPICE/VNC client
+       makes. It is what Windows' I-beam and resize cursors use, and
+       black-on-transparent reads correctly against the light backgrounds
+       those appear over. */
+    if (header.type == Constants.SPICE_CURSOR_TYPE_MONO)
+    {
+        var bpl = (width + 7) >> 3;
+        if (u8.length < bpl * height * 2)
+            return null;
+        for (var y = 0; y < height; y++)
+        {
+            for (var x = 0; x < width; x++)
+            {
+                var byte_at = y * bpl + (x >> 3);
+                var bit = 0x80 >> (x & 7);
+                var and_bit = (u8[byte_at] & bit) != 0;
+                var xor_bit = (u8[bpl * height + byte_at] & bit) != 0;
+
+                at = (y * width + x) * 4;
+                if (and_bit && ! xor_bit)
+                    continue;               /* transparent; rgba is zeroed */
+
+                var lum = xor_bit && ! and_bit ? 255 : 0;
+                rgba[at] = rgba[at + 1] = rgba[at + 2] = lum;
+                rgba[at + 3] = 255;
+            }
+        }
+        return rgba;
+    }
+
+    /* 32bpp BGRA followed by a 1bpp AND mask: mask set means the pixel
+       is transparent. spice-gtk renders the "white pixel that is also
+       masked" case as a dim checkerboard rather than a hole, because
+       that combination is how shapes encode invert; do the same. */
+    if (header.type == Constants.SPICE_CURSOR_TYPE_COLOR32)
+    {
+        var mask_at = pixels * 4;
+        if (u8.length < mask_at + ((width + 7) >> 3) * height)
+            return null;
+        for (i = 0, at = 0; i < pixels; i++, at += 4)
+        {
+            var masked = (u8[mask_at + (i >> 3)] & (0x80 >> (i & 7))) != 0;
+            var white = u8[at] == 0xff && u8[at + 1] == 0xff && u8[at + 2] == 0xff;
+            if (masked && white)
+            {
+                var dark = (((i % width) ^ ((i / width) | 0)) & 1) != 0;
+                rgba[at] = rgba[at + 1] = rgba[at + 2] = dark ? 0x30 : 0x50;
+                rgba[at + 3] = dark ? 0xc0 : 0x30;
+                continue;
+            }
+            rgba[at]     = u8[at + 2];
+            rgba[at + 1] = u8[at + 1];
+            rgba[at + 2] = u8[at];
+            rgba[at + 3] = masked ? 0 : 255;
+        }
+        return rgba;
+    }
+
+    return null;
+}
+
+/* True if the shape was converted and applied. */
+SpiceCursorConn.prototype.set_cursor = function(cursor)
+{
+    var rgba = cursor_to_rgba(cursor.header, cursor.data);
+    if (! rgba)
+        return false;
+
+    var pngstr = create_rgba_png(cursor.header.width, cursor.header.height, rgba);
+    var curstr = 'url(data:image/png,' + pngstr + ') ' +
+        cursor.header.hot_spot_x + ' ' + cursor.header.hot_spot_y + ", default";
+    var screen = document.getElementById(this.parent.screen_id);
+    screen.style.cursor = 'auto';
+    screen.style.cursor = curstr;
+    /* Chromium and Firefox drop a cursor image over 128 px on a side
+       without saying so: the computed style still reads as the url,
+       and the pointer is the plain arrow, with the arrow's hot spot,
+       so it points somewhere other than the guest's cursor does.  A
+       shape that size is drawn under the pointer instead. */
+    var too_large = cursor.header.width > MAX_CSS_CURSOR || cursor.header.height > MAX_CSS_CURSOR;
+    if (too_large || window.getComputedStyle(screen, null).cursor == 'auto')
+        SpiceSimulateCursor.simulate_cursor(this, cursor, screen, pngstr, too_large);
+    else
+    {
+        /* This cursor took effect natively, so drop the simulated one
+           left by an earlier browser-rejected cursor; the mousemove
+           handler would otherwise keep painting it alongside the real
+           cursor forever. */
+        this.remove_simulated_cursor();
+    }
+    return true;
+}
+
+/* A hidden pointer is hidden whichever way the last shape was shown:
+   the CSS cursor goes to none, and a simulated cursor image is removed,
+   or the mousemove handler would keep painting it. */
+SpiceCursorConn.prototype.hide_cursor = function()
+{
+    document.getElementById(this.parent.screen_id).style.cursor = "none";
+    this.remove_simulated_cursor();
+}
+
+SpiceCursorConn.prototype.remove_simulated_cursor = function()
+{
+    if (! this.spice_simulated_cursor)
+        return;
+    if (this.spice_simulated_cursor.parentNode)
+        this.spice_simulated_cursor.parentNode.removeChild(this.spice_simulated_cursor);
+    delete this.spice_simulated_cursor;
+}
+
+SpiceCursorConn.prototype.cleanup = function()
+{
+    /* The screen div outlives the connection: a simulated cursor left in
+       it would sit frozen over the next session, and a guest that ended
+       with its pointer hidden (or a custom shape) would leave the next
+       one without a visible pointer until it sends a shape of its own. */
+    this.remove_simulated_cursor();
+    var screen = document.getElementById(this.parent.screen_id);
+    if (screen)
+        screen.style.cursor = "auto";
+    SpiceConn.prototype.cleanup.call(this);
+}
+
+export {
+  SpiceCursorConn,
+};
@@ -0,0 +1,384 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+/*----------------------------------------------------------------------------
+**  enums.js
+**      'constants' for Spice
+**--------------------------------------------------------------------------*/
+export var Constants = {
+  SPICE_MAGIC         : "REDQ",
+  SPICE_VERSION_MAJOR : 2,
+  SPICE_VERSION_MINOR : 2,
+
+  SPICE_CONNECT_TIMEOUT : (30 * 1000),
+
+  SPICE_COMMON_CAP_PROTOCOL_AUTH_SELECTION : 0,
+  SPICE_COMMON_CAP_AUTH_SPICE              : 1,
+  SPICE_COMMON_CAP_AUTH_SASL               : 2,
+  SPICE_COMMON_CAP_MINI_HEADER             : 3,
+
+  SPICE_TICKET_KEY_PAIR_LENGTH             : 1024,
+  SPICE_TICKET_PUBKEY_BYTES                : (1024 / 8 +34), // (SPICE_TICKET_KEY_PAIR_LENGTH / 8 + 34)
+
+  SPICE_LINK_ERR_OK                        : 0,
+  SPICE_LINK_ERR_ERROR                     : 1,
+  SPICE_LINK_ERR_INVALID_MAGIC             : 2,
+  SPICE_LINK_ERR_INVALID_DATA              : 3,
+  SPICE_LINK_ERR_VERSION_MISMATCH          : 4,
+  SPICE_LINK_ERR_NEED_SECURED              : 5,
+  SPICE_LINK_ERR_NEED_UNSECURED            : 6,
+  SPICE_LINK_ERR_PERMISSION_DENIED         : 7,
+  SPICE_LINK_ERR_BAD_CONNECTION_ID         : 8,
+  SPICE_LINK_ERR_CHANNEL_NOT_AVAILABLE     : 9,
+
+  SPICE_MSG_MIGRATE                   : 1,
+  SPICE_MSG_MIGRATE_DATA              : 2,
+  SPICE_MSG_SET_ACK                   : 3,
+  SPICE_MSG_PING                      : 4,
+  SPICE_MSG_WAIT_FOR_CHANNELS         : 5,
+  SPICE_MSG_DISCONNECTING             : 6,
+  SPICE_MSG_NOTIFY                    : 7,
+  SPICE_MSG_LIST                      : 8,
+
+  SPICE_MSG_MAIN_MIGRATE_BEGIN        : 101,
+  SPICE_MSG_MAIN_MIGRATE_CANCEL       : 102,
+  SPICE_MSG_MAIN_INIT                 : 103,
+  SPICE_MSG_MAIN_CHANNELS_LIST        : 104,
+  SPICE_MSG_MAIN_MOUSE_MODE           : 105,
+  SPICE_MSG_MAIN_MULTI_MEDIA_TIME     : 106,
+  SPICE_MSG_MAIN_AGENT_CONNECTED      : 107,
+  SPICE_MSG_MAIN_AGENT_DISCONNECTED   : 108,
+  SPICE_MSG_MAIN_AGENT_DATA           : 109,
+  SPICE_MSG_MAIN_AGENT_TOKEN          : 110,
+  SPICE_MSG_MAIN_MIGRATE_SWITCH_HOST  : 111,
+  SPICE_MSG_MAIN_MIGRATE_END          : 112,
+  SPICE_MSG_MAIN_NAME                 : 113,
+  SPICE_MSG_MAIN_UUID                 : 114,
+  SPICE_MSG_MAIN_AGENT_CONNECTED_TOKENS : 115,
+  SPICE_MSG_MAIN_MIGRATE_BEGIN_SEAMLESS : 116,
+  SPICE_MSG_MAIN_MIGRATE_DST_SEAMLESS_ACK : 117,
+  SPICE_MSG_MAIN_MIGRATE_DST_SEAMLESS_NACK : 118,
+  SPICE_MSG_END_MAIN                  : 119,
+
+
+
+  SPICE_MSGC_ACK_SYNC                 : 1,
+  SPICE_MSGC_ACK                      : 2,
+  SPICE_MSGC_PONG                     : 3,
+  SPICE_MSGC_MIGRATE_FLUSH_MARK       : 4,
+  SPICE_MSGC_MIGRATE_DATA             : 5,
+  SPICE_MSGC_DISCONNECTING            : 6,
+
+
+  SPICE_MSGC_MAIN_CLIENT_INFO         : 101,
+  SPICE_MSGC_MAIN_MIGRATE_CONNECTED   : 102,
+  SPICE_MSGC_MAIN_MIGRATE_CONNECT_ERROR : 103,
+  SPICE_MSGC_MAIN_ATTACH_CHANNELS     : 104,
+  SPICE_MSGC_MAIN_MOUSE_MODE_REQUEST  : 105,
+  SPICE_MSGC_MAIN_AGENT_START         : 106,
+  SPICE_MSGC_MAIN_AGENT_DATA          : 107,
+  SPICE_MSGC_MAIN_AGENT_TOKEN         : 108,
+  SPICE_MSGC_MAIN_MIGRATE_END         : 109,
+  SPICE_MSGC_END_MAIN                 : 110,
+
+  SPICE_MSG_DISPLAY_MODE              : 101,
+  SPICE_MSG_DISPLAY_MARK              : 102,
+  SPICE_MSG_DISPLAY_RESET             : 103,
+  SPICE_MSG_DISPLAY_COPY_BITS         : 104,
+  SPICE_MSG_DISPLAY_INVAL_LIST        : 105,
+  SPICE_MSG_DISPLAY_INVAL_ALL_PIXMAPS : 106,
+  SPICE_MSG_DISPLAY_INVAL_PALETTE     : 107,
+  SPICE_MSG_DISPLAY_INVAL_ALL_PALETTES: 108,
+
+  SPICE_MSG_DISPLAY_STREAM_CREATE     : 122,
+  SPICE_MSG_DISPLAY_STREAM_DATA       : 123,
+  SPICE_MSG_DISPLAY_STREAM_CLIP       : 124,
+  SPICE_MSG_DISPLAY_STREAM_DESTROY    : 125,
+  SPICE_MSG_DISPLAY_STREAM_DESTROY_ALL: 126,
+
+  SPICE_MSG_DISPLAY_DRAW_FILL         : 302,
+  SPICE_MSG_DISPLAY_DRAW_OPAQUE       : 303,
+  SPICE_MSG_DISPLAY_DRAW_COPY         : 304,
+  SPICE_MSG_DISPLAY_DRAW_BLEND        : 305,
+  SPICE_MSG_DISPLAY_DRAW_BLACKNESS    : 306,
+  SPICE_MSG_DISPLAY_DRAW_WHITENESS    : 307,
+  SPICE_MSG_DISPLAY_DRAW_INVERS       : 308,
+  SPICE_MSG_DISPLAY_DRAW_ROP3         : 309,
+  SPICE_MSG_DISPLAY_DRAW_STROKE       : 310,
+  SPICE_MSG_DISPLAY_DRAW_TEXT         : 311,
+  SPICE_MSG_DISPLAY_DRAW_TRANSPARENT  : 312,
+  SPICE_MSG_DISPLAY_DRAW_ALPHA_BLEND  : 313,
+  SPICE_MSG_DISPLAY_SURFACE_CREATE    : 314,
+  SPICE_MSG_DISPLAY_SURFACE_DESTROY   : 315,
+  SPICE_MSG_DISPLAY_STREAM_DATA_SIZED : 316,
+  SPICE_MSG_DISPLAY_MONITORS_CONFIG   : 317,
+  SPICE_MSG_DISPLAY_DRAW_COMPOSITE    : 318,
+  SPICE_MSG_DISPLAY_STREAM_ACTIVATE_REPORT : 319,
+
+  SPICE_MSGC_DISPLAY_INIT             : 101,
+  SPICE_MSGC_DISPLAY_STREAM_REPORT    : 102,
+
+  SPICE_MSG_INPUTS_INIT               : 101,
+  SPICE_MSG_INPUTS_KEY_MODIFIERS      : 102,
+
+  SPICE_MSG_INPUTS_MOUSE_MOTION_ACK   : 111,
+
+  SPICE_MSGC_INPUTS_KEY_DOWN          : 101,
+  SPICE_MSGC_INPUTS_KEY_UP            : 102,
+  SPICE_MSGC_INPUTS_KEY_MODIFIERS     : 103,
+
+  SPICE_MSGC_INPUTS_MOUSE_MOTION      : 111,
+  SPICE_MSGC_INPUTS_MOUSE_POSITION    : 112,
+  SPICE_MSGC_INPUTS_MOUSE_PRESS       : 113,
+  SPICE_MSGC_INPUTS_MOUSE_RELEASE     : 114,
+
+  SPICE_MSG_CURSOR_INIT               : 101,
+  SPICE_MSG_CURSOR_RESET              : 102,
+  SPICE_MSG_CURSOR_SET                : 103,
+  SPICE_MSG_CURSOR_MOVE               : 104,
+  SPICE_MSG_CURSOR_HIDE               : 105,
+  SPICE_MSG_CURSOR_TRAIL              : 106,
+  SPICE_MSG_CURSOR_INVAL_ONE          : 107,
+  SPICE_MSG_CURSOR_INVAL_ALL          : 108,
+
+  SPICE_MSG_PLAYBACK_DATA             : 101,
+  SPICE_MSG_PLAYBACK_MODE             : 102,
+  SPICE_MSG_PLAYBACK_START            : 103,
+  SPICE_MSG_PLAYBACK_STOP             : 104,
+  SPICE_MSG_PLAYBACK_VOLUME           : 105,
+  SPICE_MSG_PLAYBACK_MUTE             : 106,
+  SPICE_MSG_PLAYBACK_LATENCY          : 107,
+
+  SPICE_MSG_SPICEVMC_DATA             : 101,
+  SPICE_MSG_PORT_INIT                 : 201,
+  SPICE_MSG_PORT_EVENT                : 202,
+  SPICE_MSG_END_PORT                  : 203,
+
+  SPICE_MSGC_SPICEVMC_DATA            : 101,
+  SPICE_MSGC_PORT_EVENT               : 201,
+  SPICE_MSGC_END_PORT                 : 202,
+
+  SPICE_PLAYBACK_CAP_CELT_0_5_1       : 0,
+  SPICE_PLAYBACK_CAP_VOLUME           : 1,
+  SPICE_PLAYBACK_CAP_LATENCY          : 2,
+  SPICE_PLAYBACK_CAP_OPUS             : 3,
+
+  SPICE_MAIN_CAP_SEMI_SEAMLESS_MIGRATE  : 0,
+  SPICE_MAIN_CAP_NAME_AND_UUID          : 1,
+  SPICE_MAIN_CAP_AGENT_CONNECTED_TOKENS : 2,
+  SPICE_MAIN_CAP_SEAMLESS_MIGRATE       : 3,
+
+  SPICE_DISPLAY_CAP_SIZED_STREAM        : 0,
+  SPICE_DISPLAY_CAP_MONITORS_CONFIG     : 1,
+  SPICE_DISPLAY_CAP_COMPOSITE           : 2,
+  SPICE_DISPLAY_CAP_A8_SURFACE          : 3,
+  SPICE_DISPLAY_CAP_STREAM_REPORT       : 4,
+  SPICE_DISPLAY_CAP_LZ4_COMPRESSION     : 5,
+  SPICE_DISPLAY_CAP_PREF_COMPRESSION    : 6,
+  SPICE_DISPLAY_CAP_GL_SCANOUT          : 7,
+  SPICE_DISPLAY_CAP_MULTI_CODEC         : 8,
+  SPICE_DISPLAY_CAP_CODEC_MJPEG         : 9,
+  SPICE_DISPLAY_CAP_CODEC_VP8           : 10,
+
+  SPICE_AUDIO_DATA_MODE_INVALID       : 0,
+  SPICE_AUDIO_DATA_MODE_RAW           : 1,
+  SPICE_AUDIO_DATA_MODE_CELT_0_5_1    : 2,
+  SPICE_AUDIO_DATA_MODE_OPUS          : 3,
+
+  SPICE_AUDIO_FMT_INVALID             : 0,
+  SPICE_AUDIO_FMT_S16                 : 1,
+
+  SPICE_CHANNEL_MAIN                  : 1,
+  SPICE_CHANNEL_DISPLAY               : 2,
+  SPICE_CHANNEL_INPUTS                : 3,
+  SPICE_CHANNEL_CURSOR                : 4,
+  SPICE_CHANNEL_PLAYBACK              : 5,
+  SPICE_CHANNEL_RECORD                : 6,
+  SPICE_CHANNEL_TUNNEL                : 7,
+  SPICE_CHANNEL_SMARTCARD             : 8,
+  SPICE_CHANNEL_USBREDIR              : 9,
+  SPICE_CHANNEL_PORT                  : 10,
+  SPICE_CHANNEL_WEBDAV                : 11,
+
+  SPICE_SURFACE_FLAGS_PRIMARY : (1 << 0),
+
+  SPICE_NOTIFY_SEVERITY_INFO  : 0,
+  SPICE_NOTIFY_SEVERITY_WARN  : 1,
+  SPICE_NOTIFY_SEVERITY_ERROR : 2,
+
+  SPICE_MOUSE_MODE_SERVER : (1 << 0),
+  SPICE_MOUSE_MODE_CLIENT : (1 << 1),
+  SPICE_MOUSE_MODE_MASK : 0x3,
+
+  SPICE_CLIP_TYPE_NONE            : 0,
+  SPICE_CLIP_TYPE_RECTS           : 1,
+
+  SPICE_IMAGE_SCALE_MODE_INTERPOLATE : 0,
+  SPICE_IMAGE_SCALE_MODE_NEAREST     : 1,
+
+  SPICE_IMAGE_TYPE_BITMAP         : 0,
+  SPICE_IMAGE_TYPE_QUIC           : 1,
+  SPICE_IMAGE_TYPE_RESERVED       : 2,
+  SPICE_IMAGE_TYPE_LZ_PLT         : 100,
+  SPICE_IMAGE_TYPE_LZ_RGB         : 101,
+  SPICE_IMAGE_TYPE_GLZ_RGB        : 102,
+  SPICE_IMAGE_TYPE_FROM_CACHE     : 103,
+  SPICE_IMAGE_TYPE_SURFACE        : 104,
+  SPICE_IMAGE_TYPE_JPEG           : 105,
+  SPICE_IMAGE_TYPE_FROM_CACHE_LOSSLESS : 106,
+  SPICE_IMAGE_TYPE_ZLIB_GLZ_RGB   : 107,
+  SPICE_IMAGE_TYPE_JPEG_ALPHA     : 108,
+
+  SPICE_IMAGE_FLAGS_CACHE_ME : (1 << 0),
+  SPICE_IMAGE_FLAGS_HIGH_BITS_SET : (1 << 1),
+  SPICE_IMAGE_FLAGS_CACHE_REPLACE_ME : (1 << 2),
+
+  SPICE_BITMAP_FLAGS_PAL_CACHE_ME : (1 << 0),
+  SPICE_BITMAP_FLAGS_PAL_FROM_CACHE : (1 << 1),
+  SPICE_BITMAP_FLAGS_TOP_DOWN : (1 << 2),
+  SPICE_BITMAP_FLAGS_MASK : 0x7,
+
+  SPICE_BITMAP_FMT_INVALID        : 0,
+  SPICE_BITMAP_FMT_1BIT_LE        : 1,
+  SPICE_BITMAP_FMT_1BIT_BE        : 2,
+  SPICE_BITMAP_FMT_4BIT_LE        : 3,
+  SPICE_BITMAP_FMT_4BIT_BE        : 4,
+  SPICE_BITMAP_FMT_8BIT           : 5,
+  SPICE_BITMAP_FMT_16BIT          : 6,
+  SPICE_BITMAP_FMT_24BIT          : 7,
+  SPICE_BITMAP_FMT_32BIT          : 8,
+  SPICE_BITMAP_FMT_RGBA           : 9,
+
+
+  SPICE_CURSOR_FLAGS_NONE : (1 << 0),
+  SPICE_CURSOR_FLAGS_CACHE_ME : (1 << 1),
+  SPICE_CURSOR_FLAGS_FROM_CACHE : (1 << 2),
+  SPICE_CURSOR_FLAGS_MASK : 0x7,
+
+  SPICE_MOUSE_BUTTON_MASK_LEFT : (1 << 0),
+  SPICE_MOUSE_BUTTON_MASK_MIDDLE : (1 << 1),
+  SPICE_MOUSE_BUTTON_MASK_RIGHT : (1 << 2),
+  SPICE_MOUSE_BUTTON_MASK_MASK : 0x7,
+
+  SPICE_MOUSE_BUTTON_INVALID  : 0,
+  SPICE_MOUSE_BUTTON_LEFT     : 1,
+  SPICE_MOUSE_BUTTON_MIDDLE   : 2,
+  SPICE_MOUSE_BUTTON_RIGHT    : 3,
+  SPICE_MOUSE_BUTTON_UP       : 4,
+  SPICE_MOUSE_BUTTON_DOWN     : 5,
+
+  SPICE_BRUSH_TYPE_NONE : 0,
+  SPICE_BRUSH_TYPE_SOLID : 1,
+  SPICE_BRUSH_TYPE_PATTERN : 2,
+
+  SPICE_SURFACE_FMT_INVALID : 0,
+  SPICE_SURFACE_FMT_1_A : 1,
+  SPICE_SURFACE_FMT_8_A : 8,
+  SPICE_SURFACE_FMT_16_555 : 16,
+  SPICE_SURFACE_FMT_32_xRGB : 32,
+  SPICE_SURFACE_FMT_16_565 : 80,
+  SPICE_SURFACE_FMT_32_ARGB : 96,
+
+  SPICE_ROPD_INVERS_SRC : (1 << 0),
+  SPICE_ROPD_INVERS_BRUSH : (1 << 1),
+  SPICE_ROPD_INVERS_DEST : (1 << 2),
+  SPICE_ROPD_OP_PUT : (1 << 3),
+  SPICE_ROPD_OP_OR : (1 << 4),
+  SPICE_ROPD_OP_AND : (1 << 5),
+  SPICE_ROPD_OP_XOR : (1 << 6),
+  SPICE_ROPD_OP_BLACKNESS : (1 << 7),
+  SPICE_ROPD_OP_WHITENESS : (1 << 8),
+  SPICE_ROPD_OP_INVERS : (1 << 9),
+  SPICE_ROPD_INVERS_RES : (1 << 10),
+  SPICE_ROPD_MASK : 0x7ff,
+
+  LZ_IMAGE_TYPE_INVALID : 0,
+  LZ_IMAGE_TYPE_PLT1_LE : 1,
+  LZ_IMAGE_TYPE_PLT1_BE : 2,      // PLT stands for palette
+  LZ_IMAGE_TYPE_PLT4_LE : 3,
+  LZ_IMAGE_TYPE_PLT4_BE : 4,
+  LZ_IMAGE_TYPE_PLT8    : 5,
+  LZ_IMAGE_TYPE_RGB16   : 6,
+  LZ_IMAGE_TYPE_RGB24   : 7,
+  LZ_IMAGE_TYPE_RGB32   : 8,
+  LZ_IMAGE_TYPE_RGBA    : 9,
+  LZ_IMAGE_TYPE_XXXA    : 10,
+
+
+  SPICE_INPUT_MOTION_ACK_BUNCH : 4,
+
+
+  SPICE_CURSOR_TYPE_ALPHA     : 0,
+  SPICE_CURSOR_TYPE_MONO      : 1,
+  SPICE_CURSOR_TYPE_COLOR4    : 2,
+  SPICE_CURSOR_TYPE_COLOR8    : 3,
+  SPICE_CURSOR_TYPE_COLOR16   : 4,
+  SPICE_CURSOR_TYPE_COLOR24   : 5,
+  SPICE_CURSOR_TYPE_COLOR32   : 6,
+
+  SPICE_VIDEO_CODEC_TYPE_MJPEG : 1,
+  SPICE_VIDEO_CODEC_TYPE_VP8   : 2,
+
+  SPICE_STREAM_FLAGS_TOP_DOWN : (1 << 0),
+
+  VD_AGENT_PROTOCOL : 1,
+  VD_AGENT_MAX_DATA_SIZE : 2048,
+
+  VD_AGENT_MOUSE_STATE            : 1,
+  VD_AGENT_MONITORS_CONFIG        : 2,
+  VD_AGENT_REPLY                  : 3,
+  VD_AGENT_CLIPBOARD              : 4,
+  VD_AGENT_DISPLAY_CONFIG         : 5,
+  VD_AGENT_ANNOUNCE_CAPABILITIES  : 6,
+  VD_AGENT_CLIPBOARD_GRAB         : 7,
+  VD_AGENT_CLIPBOARD_REQUEST      : 8,
+  VD_AGENT_CLIPBOARD_RELEASE      : 9,
+  VD_AGENT_FILE_XFER_START        :10,
+  VD_AGENT_FILE_XFER_STATUS       :11,
+  VD_AGENT_FILE_XFER_DATA         :12,
+  VD_AGENT_CLIENT_DISCONNECTED    :13,
+  VD_AGENT_MAX_CLIPBOARD          :14,
+
+  VD_AGENT_CAP_MOUSE_STATE            : 0,
+  VD_AGENT_CAP_MONITORS_CONFIG        : 1,
+  VD_AGENT_CAP_REPLY                  : 2,
+  VD_AGENT_CAP_CLIPBOARD              : 3,
+  VD_AGENT_CAP_DISPLAY_CONFIG         : 4,
+  VD_AGENT_CAP_CLIPBOARD_BY_DEMAND    : 5,
+  VD_AGENT_CAP_CLIPBOARD_SELECTION    : 6,
+  VD_AGENT_CAP_SPARSE_MONITORS_CONFIG : 7,
+  VD_AGENT_CAP_GUEST_LINEEND_LF       : 8,
+  VD_AGENT_CAP_GUEST_LINEEND_CRLF     : 9,
+  VD_AGENT_CAP_MAX_CLIPBOARD          : 10,
+  VD_AGENT_END_CAP                    : 11,
+
+  VD_AGENT_FILE_XFER_STATUS_CAN_SEND_DATA : 0,
+  VD_AGENT_FILE_XFER_STATUS_CANCELLED     : 1,
+  VD_AGENT_FILE_XFER_STATUS_ERROR         : 2,
+  VD_AGENT_FILE_XFER_STATUS_SUCCESS       : 3,
+
+  VD_AGENT_CLIPBOARD_NONE       : 0,
+  VD_AGENT_CLIPBOARD_UTF8_TEXT  : 1,
+  VD_AGENT_CLIPBOARD_IMAGE_PNG  : 2,
+  VD_AGENT_CLIPBOARD_IMAGE_BMP  : 3,
+  VD_AGENT_CLIPBOARD_IMAGE_TIFF : 4,
+  VD_AGENT_CLIPBOARD_IMAGE_JPG  : 5,
+};
@@ -0,0 +1,94 @@
+"use strict";
+/*
+   Copyright (C) 2014 Red Hat, Inc.
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+function SpiceFileXferTask(id, file)
+{
+    this.id = id;
+    this.file = file;
+}
+
+SpiceFileXferTask.prototype.create_progressbar = function()
+{
+    var _this = this;
+    var cancel = document.createElement("input");
+    this.progressbar_container = document.createElement("div");
+    this.progressbar = document.createElement("progress");
+
+    cancel.type = 'button';
+    cancel.value = 'Cancel';
+    cancel.style.float = 'right';
+    cancel.onclick = function()
+    {
+        _this.cancelled = true;
+        _this.remove_progressbar();
+    };
+
+    this.progressbar.setAttribute('max', this.file.size);
+    this.progressbar.setAttribute('value', 0);
+    this.progressbar.style.width = '100%';
+    this.progressbar.style.margin = '4px auto';
+    this.progressbar.style.display = 'inline-block';
+    this.progressbar_container.style.width = '90%';
+    this.progressbar_container.style.margin = 'auto';
+    this.progressbar_container.style.padding = '4px';
+    this.progressbar_container.textContent = this.file.name;
+    this.progressbar_container.appendChild(cancel);
+    this.progressbar_container.appendChild(this.progressbar);
+    document.getElementById('spice-xfer-area').appendChild(this.progressbar_container);
+}
+
+SpiceFileXferTask.prototype.update_progressbar = function(value)
+{
+    this.progressbar.setAttribute('value', value);
+}
+
+SpiceFileXferTask.prototype.remove_progressbar = function()
+{
+    if (this.progressbar_container && this.progressbar_container.parentNode)
+        this.progressbar_container.parentNode.removeChild(this.progressbar_container);
+}
+
+function handle_file_dragover(e)
+{
+    e.stopPropagation();
+    e.preventDefault();
+    e.dataTransfer.dropEffect = 'copy';
+}
+
+function handle_file_drop(e)
+{
+    var sc = window.spice_connection;
+    var files = e.dataTransfer.files;
+
+    e.stopPropagation();
+    e.preventDefault();
+    for (var i = files.length - 1; i >= 0; i--)
+    {
+        if (files[i].type) // do not copy a directory
+            sc.file_xfer_start(files[i]);
+    }
+
+}
+
+export {
+  SpiceFileXferTask,
+  handle_file_dragover,
+  handle_file_drop,
+};
@@ -0,0 +1,504 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import * as Messages from './spicemsg.js';
+import { Constants } from './enums.js';
+import { KeyNames } from './atKeynames.js';
+import { SpiceConn } from './spiceconn.js';
+import { DEBUG } from './utils.js';
+import { code_to_scancode } from './code_to_scancode.js';
+
+/*----------------------------------------------------------------------------
+ ** Modifier Keystates
+ **     These need to be tracked because focus in and out can get the keyboard
+ **     out of sync.
+ **------------------------------------------------------------------------*/
+var Shift_state = -1;
+var Ctrl_state = -1;
+var Alt_state = -1;
+var Meta_state = -1;
+
+/* Extended (0xE0-prefixed) scancodes for the Meta/Super keys, matching
+   the values in the scancode maps (utils.js / code_to_scancode.js). */
+var META_L_SCAN = 0xE0 | (0x5B << 8);
+var META_R_SCAN = 0xE0 | (0x5C << 8);
+
+/*----------------------------------------------------------------------------
+**  SpiceInputsConn
+**      Drive the Spice Inputs channel (e.g. mouse + keyboard)
+**--------------------------------------------------------------------------*/
+function SpiceInputsConn()
+{
+    SpiceConn.apply(this, arguments);
+
+    this.mousex = undefined;
+    this.mousey = undefined;
+    this.button_state = 0;
+    this.waiting_for_ack = 0;
+
+    /* Modifier tracking is module state; a page that tears down one
+       connection and creates another must not inherit the previous
+       session's held keys. */
+    Shift_state = Ctrl_state = Alt_state = Meta_state = -1;
+}
+
+SpiceInputsConn.prototype = Object.create(SpiceConn.prototype);
+SpiceInputsConn.prototype.process_channel_message = function(msg)
+{
+    if (msg.type == Constants.SPICE_MSG_INPUTS_INIT)
+    {
+        var inputs_init = new Messages.SpiceMsgInputsInit(msg.data);
+        this.keyboard_modifiers = inputs_init.keyboard_modifiers;
+        DEBUG > 1 && console.log("MsgInputsInit - modifier " + this.keyboard_modifiers);
+        // FIXME - We don't do anything with the keyboard modifiers...
+        return true;
+    }
+    if (msg.type == Constants.SPICE_MSG_INPUTS_KEY_MODIFIERS)
+    {
+        var key = new Messages.SpiceMsgInputsKeyModifiers(msg.data);
+        this.keyboard_modifiers = key.keyboard_modifiers;
+        DEBUG > 1 && console.log("MsgInputsKeyModifiers - modifier " + this.keyboard_modifiers);
+        // FIXME - We don't do anything with the keyboard modifiers...
+        return true;
+    }
+    if (msg.type == Constants.SPICE_MSG_INPUTS_MOUSE_MOTION_ACK)
+    {
+        DEBUG > 1 && console.log("mouse motion ack");
+        this.waiting_for_ack -= Constants.SPICE_INPUT_MOTION_ACK_BUNCH;
+        return true;
+    }
+    return false;
+}
+
+
+
+function handle_mousemove(e)
+{
+    /* Only build the message once we know it will be sent; mousemove can
+       fire hundreds of times a second and the discarded-motion path was
+       paying for two allocations and a serialize per event. */
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+    {
+        if (this.sc.inputs.waiting_for_ack < (2 * Constants.SPICE_INPUT_MOTION_ACK_BUNCH))
+        {
+            var msg = new Messages.SpiceMiniData();
+            var move;
+            if (this.sc.mouse_mode == Constants.SPICE_MOUSE_MODE_CLIENT)
+            {
+                move = new Messages.SpiceMsgcMousePosition(this.sc, e)
+                msg.build_msg(Constants.SPICE_MSGC_INPUTS_MOUSE_POSITION, move);
+            }
+            else
+            {
+                move = new Messages.SpiceMsgcMouseMotion(this.sc, e)
+                msg.build_msg(Constants.SPICE_MSGC_INPUTS_MOUSE_MOTION, move);
+            }
+            this.sc.inputs.send_msg(msg);
+            this.sc.inputs.waiting_for_ack++;
+        }
+        else
+        {
+            DEBUG > 0 && this.sc.log_info("Discarding mouse motion");
+        }
+    }
+
+    if (this.sc && this.sc.cursor && this.sc.cursor.spice_simulated_cursor)
+    {
+        /* The image sits inside the screen element, so it is placed in
+           that element's own coordinates: the pointer's position within
+           its box, undone for any CSS scale on it.  Page coordinates put
+           it off by the screen's offset, and by the scale, on any page
+           that does not draw the screen at the top-left corner. */
+        var sim = this.sc.cursor.spice_simulated_cursor;
+        var screen = sim.spice_screen;
+        var rect = screen.getBoundingClientRect();
+        var scale_x = screen.offsetWidth ? rect.width / screen.offsetWidth : 1;
+        var scale_y = screen.offsetHeight ? rect.height / screen.offsetHeight : 1;
+        sim.style.display = 'block';
+        sim.style.left = (e.clientX - rect.left) / scale_x - sim.spice_hot_x + 'px';
+        sim.style.top = (e.clientY - rect.top) / scale_y - sim.spice_hot_y + 'px';
+        e.preventDefault();
+    }
+
+}
+
+function handle_mousedown(e)
+{
+    var press = new Messages.SpiceMsgcMousePress(this.sc, e)
+    var msg = new Messages.SpiceMiniData();
+    msg.build_msg(Constants.SPICE_MSGC_INPUTS_MOUSE_PRESS, press);
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+        this.sc.inputs.send_msg(msg);
+
+    e.preventDefault();
+}
+
+function handle_contextmenu(e)
+{
+    e.preventDefault();
+    return false;
+}
+
+function handle_mouseup(e)
+{
+    var release = new Messages.SpiceMsgcMouseRelease(this.sc, e)
+    var msg = new Messages.SpiceMiniData();
+    msg.build_msg(Constants.SPICE_MSGC_INPUTS_MOUSE_RELEASE, release);
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+        this.sc.inputs.send_msg(msg);
+
+    e.preventDefault();
+}
+
+function handle_mousewheel(e)
+{
+    var press = new Messages.SpiceMsgcMousePress;
+    var release = new Messages.SpiceMsgcMouseRelease;
+    if (e.deltaY < 0)
+        press.button = release.button = Constants.SPICE_MOUSE_BUTTON_UP;
+    else
+        press.button = release.button = Constants.SPICE_MOUSE_BUTTON_DOWN;
+    press.buttons_state = 0;
+    release.buttons_state = 0;
+
+    var msg = new Messages.SpiceMiniData();
+    msg.build_msg(Constants.SPICE_MSGC_INPUTS_MOUSE_PRESS, press);
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+        this.sc.inputs.send_msg(msg);
+
+    msg.build_msg(Constants.SPICE_MSGC_INPUTS_MOUSE_RELEASE, release);
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+        this.sc.inputs.send_msg(msg);
+
+    e.preventDefault();
+}
+
+function handle_keydown(e)
+{
+    var key = new Messages.SpiceMsgcKeyDown(e)
+    var msg = new Messages.SpiceMiniData();
+    check_and_update_modifiers(e, key.code, this.sc);
+    msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_DOWN, key);
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+        this.sc.inputs.send_msg(msg);
+
+    e.preventDefault();
+}
+
+function handle_keyup(e)
+{
+    var key = new Messages.SpiceMsgcKeyUp(e)
+    var msg = new Messages.SpiceMiniData();
+    check_and_update_modifiers(e, key.code, this.sc);
+    msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_UP, key);
+    if (this.sc && this.sc.inputs && this.sc.inputs.state === "ready")
+        this.sc.inputs.send_msg(msg);
+
+    e.preventDefault();
+}
+
+function sendCtrlAltDel(sc)
+{
+    if (sc && sc.inputs && sc.inputs.state === "ready"){
+        var key = new Messages.SpiceMsgcKeyDown();
+        var msg = new Messages.SpiceMiniData();
+
+        update_modifier(true, KeyNames.KEY_LCtrl, sc);
+        update_modifier(true, KeyNames.KEY_Alt, sc);
+
+        key.code = KeyNames.KEY_KP_Decimal;
+        msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_DOWN, key);
+        sc.inputs.send_msg(msg);
+        /* The server forwards scancode bytes verbatim, so the release must
+           carry the break bit itself, as keycode_to_end_scan does. */
+        key.code = 0x80 | KeyNames.KEY_KP_Decimal;
+        msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_UP, key);
+        sc.inputs.send_msg(msg);
+
+        /* Release unless the key is positively known to be held: the state
+           starts as the -1 sentinel (no key seen yet), and -1 == false is
+           false, so testing against false left the synthetic Ctrl+Alt held
+           in the guest whenever this ran before the first real keydown. */
+        if(Ctrl_state !== true) update_modifier(false, KeyNames.KEY_LCtrl, sc);
+        if(Alt_state !== true) update_modifier(false, KeyNames.KEY_Alt, sc);
+    }
+}
+
+function update_modifier(state, code, sc)
+{
+    var msg = new Messages.SpiceMiniData();
+    if (!state)
+    {
+        var key = new Messages.SpiceMsgcKeyUp()
+        /* Extended (two-byte) scancodes carry the break bit in their second
+           byte, as keycode_to_end_scan does; 0x80 would land in the 0xE0
+           prefix and corrupt it. */
+        key.code = code < 0x100 ? (0x80|code) : (0x8000|code);
+        msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_UP, key);
+    }
+    else
+    {
+        var key = new Messages.SpiceMsgcKeyDown()
+        key.code = code;
+        msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_DOWN, key);
+    }
+
+    sc.inputs.send_msg(msg);
+}
+
+function check_and_update_modifiers(e, code, sc)
+{
+    if (Shift_state === -1)
+    {
+        Shift_state = e.shiftKey;
+        Ctrl_state = e.ctrlKey;
+        Alt_state = e.altKey;
+        Meta_state = e.metaKey;
+    }
+
+    if (code === KeyNames.KEY_ShiftL)
+        Shift_state = true;
+    else if (code === KeyNames.KEY_Alt)
+        Alt_state = true;
+    else if (code === KeyNames.KEY_LCtrl)
+        Ctrl_state = true;
+    else if (code === META_L_SCAN || code === META_R_SCAN)
+        Meta_state = true;
+    else if (code === (0x80|KeyNames.KEY_ShiftL))
+        Shift_state = false;
+    else if (code === (0x80|KeyNames.KEY_Alt))
+        Alt_state = false;
+    else if (code === (0x80|KeyNames.KEY_LCtrl))
+        Ctrl_state = false;
+    else if (code === (0x8000|META_L_SCAN) || code === (0x8000|META_R_SCAN))
+        Meta_state = false;
+
+    if (sc && sc.inputs && sc.inputs.state === "ready")
+    {
+        if (Shift_state != e.shiftKey)
+        {
+            console.log("Shift state out of sync");
+            update_modifier(e.shiftKey, KeyNames.KEY_ShiftL, sc);
+            Shift_state = e.shiftKey;
+        }
+        if (Alt_state != e.altKey)
+        {
+            console.log("Alt state out of sync");
+            update_modifier(e.altKey, KeyNames.KEY_Alt, sc);
+            Alt_state = e.altKey;
+        }
+        if (Ctrl_state != e.ctrlKey)
+        {
+            console.log("Ctrl state out of sync");
+            update_modifier(e.ctrlKey, KeyNames.KEY_LCtrl, sc);
+            Ctrl_state = e.ctrlKey;
+        }
+        if (Meta_state != e.metaKey)
+        {
+            console.log("Meta state out of sync");
+            update_modifier(e.metaKey, META_L_SCAN, sc);
+            Meta_state = e.metaKey;
+        }
+    }
+}
+
+/*----------------------------------------------------------------------------
+**  typeText
+**      Deliver a string to the guest as synthetic keystrokes on the inputs
+**  channel. The inputs channel speaks PC scancodes — positions on a physical
+**  keyboard, not characters — so this maps each character to the key that
+**  produces it on a US layout. A guest configured for another keymap will
+**  type different characters, and anything a US layout cannot produce with
+**  at most Shift (AltGr combinations, dead keys, non-ASCII) cannot be
+**  expressed at all; such characters are skipped and reported back.
+**--------------------------------------------------------------------------*/
+
+/* character → [KeyboardEvent.code, needs-shift] on a US layout. */
+var US_TYPEABLE = (function ()
+{
+    var map = {};
+    var i;
+
+    var letters = "abcdefghijklmnopqrstuvwxyz";
+    for (i = 0; i < letters.length; i++)
+    {
+        var code = "Key" + letters[i].toUpperCase();
+        map[letters[i]] = [code, false];
+        map[letters[i].toUpperCase()] = [code, true];
+    }
+
+    var digits = "1234567890";
+    var shifted_digits = "!@#$%^&*()";
+    for (i = 0; i < digits.length; i++)
+    {
+        map[digits[i]] = ["Digit" + digits[i], false];
+        map[shifted_digits[i]] = ["Digit" + digits[i], true];
+    }
+
+    var punctuation = [
+        ["-", "_", "Minus"],
+        ["=", "+", "Equal"],
+        ["[", "{", "BracketLeft"],
+        ["]", "}", "BracketRight"],
+        ["\\", "|", "Backslash"],
+        [";", ":", "Semicolon"],
+        ["'", "\"", "Quote"],
+        [",", "<", "Comma"],
+        [".", ">", "Period"],
+        ["/", "?", "Slash"],
+        ["`", "~", "Backquote"],
+    ];
+    for (i = 0; i < punctuation.length; i++)
+    {
+        map[punctuation[i][0]] = [punctuation[i][2], false];
+        map[punctuation[i][1]] = [punctuation[i][2], true];
+    }
+
+    map[" "] = ["Space", false];
+    map["\n"] = ["Enter", false];
+    map["\t"] = ["Tab", false];
+    return map;
+})();
+
+function send_scancode(sc, scancode, down)
+{
+    var msg = new Messages.SpiceMiniData();
+    var key;
+    if (down)
+    {
+        key = new Messages.SpiceMsgcKeyDown();
+        key.code = scancode;
+        msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_DOWN, key);
+    }
+    else
+    {
+        key = new Messages.SpiceMsgcKeyUp();
+        /* Break code; every key this file types is a one-byte scancode. */
+        key.code = 0x80 | scancode;
+        msg.build_msg(Constants.SPICE_MSGC_INPUTS_KEY_UP, key);
+    }
+    sc.inputs.send_msg(msg);
+}
+
+/* A keystroke is a press and a release separated by time.  Sending both in
+   the same tick, as this once did, makes a guest drop characters: Windows in
+   particular discards a key whose break code arrives in the same instant as
+   its make code, and the loss is silent and intermittent — a pasted URL or
+   password arrives subtly wrong.  So hold each key down, and give Shift its
+   own settle time either side, before moving on. */
+var KEY_HOLD_MS = 12;
+var SHIFT_SETTLE_MS = 12;
+
+/* A server-side close leaves the channel's state at "ready", since the
+   close handler only reports; the socket itself says whether keystrokes
+   can still reach the guest. */
+function inputs_live(sc)
+{
+    return sc && sc.inputs && sc.inputs.state === "ready" &&
+           sc.inputs.ws && sc.inputs.ws.readyState === WebSocket.OPEN;
+}
+
+/* Resolves to { typed, skipped, aborted }: how many characters went out,
+   which distinct characters had no US-layout key, and whether the inputs
+   channel died mid-string. delay_ms is the gap between characters, which
+   paces a large paste so a guest's keyboard buffer is not flooded. */
+function typeText(sc, text, delay_ms)
+{
+    var delay = typeof delay_ms === 'number' ? delay_ms : 25;
+    /* A CRLF must land as a single Enter, not Enter twice. */
+    var chars = text.replace(/\r\n/g, "\n").replace(/\r/g, "\n");
+    var skipped = [];
+    var typed = 0;
+    var at = 0;
+
+    return new Promise(function (resolve)
+    {
+        function step()
+        {
+            if (! inputs_live(sc))
+            {
+                resolve({ typed: typed, skipped: skipped, aborted: at < chars.length });
+                return;
+            }
+            if (at >= chars.length)
+            {
+                resolve({ typed: typed, skipped: skipped, aborted: false });
+                return;
+            }
+
+            var ch = chars[at++];
+            var entry = US_TYPEABLE[ch];
+            var scancode = entry && code_to_scancode[entry[0]];
+            if (!scancode)
+            {
+                if (skipped.indexOf(ch) === -1)
+                    skipped.push(ch);
+                step();
+                return;
+            }
+
+            /* Each phase is [what to send, how long to wait after it], run in
+               order; the guest sees a press, a hold, and a release. */
+            var shifted = entry[1];
+            var phases = [];
+            if (shifted)
+                phases.push([function () { send_scancode(sc, KeyNames.KEY_ShiftL, true); }, SHIFT_SETTLE_MS]);
+            phases.push([function () { send_scancode(sc, scancode, true); }, KEY_HOLD_MS]);
+            phases.push([function () { send_scancode(sc, scancode, false); }, shifted ? SHIFT_SETTLE_MS : delay]);
+            if (shifted)
+                phases.push([function () { send_scancode(sc, KeyNames.KEY_ShiftL, false); }, delay]);
+            typed++;
+
+            var phase = 0;
+            (function run()
+            {
+                if (phase >= phases.length)
+                {
+                    step();
+                    return;
+                }
+                /* The channel can die mid-character; stop rather than send a
+                   press whose release will never follow. */
+                if (!(sc && sc.inputs && sc.inputs.state === "ready"))
+                {
+                    resolve({ typed: typed - 1, skipped: skipped, aborted: true });
+                    return;
+                }
+                var current = phases[phase++];
+                current[0]();
+                window.setTimeout(run, current[1]);
+            })();
+        }
+        step();
+    });
+}
+
+export {
+  SpiceInputsConn,
+  handle_mousemove,
+  handle_mousedown,
+  handle_contextmenu,
+  handle_mouseup,
+  handle_mousewheel,
+  handle_keydown,
+  handle_keyup,
+  sendCtrlAltDel,
+  typeText,
+};
@@ -0,0 +1,181 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import { Constants } from './enums.js';
+
+/*----------------------------------------------------------------------------
+**  lz.js
+**      Functions for handling SPICE_IMAGE_TYPE_LZ_RGB
+**  Adapted from lz.c .
+**--------------------------------------------------------------------------*/
+function lz_rgb32_decompress(in_buf, at, out_buf, type, default_alpha)
+{
+    var encoder = at;
+    var op = 0;
+    var ctrl;
+    var i = 0;
+
+    for (ctrl = in_buf[encoder++]; (op * 4) < out_buf.length; ctrl = in_buf[encoder++])
+    {
+        var ref = op;
+        var len = ctrl >> 5;
+        var ofs = (ctrl & 31) << 8;
+
+        if (ctrl >= 32) {
+
+            var code;
+            len--;
+
+            if (len == 7 - 1) {
+                do {
+                    code = in_buf[encoder++];
+                    len += code;
+                } while (code == 255);
+            }
+            code = in_buf[encoder++];
+            ofs += code;
+
+
+            if (code == 255) {
+                if ((ofs - code) == (31 << 8)) {
+                    ofs = in_buf[encoder++] << 8;
+                    ofs += in_buf[encoder++];
+                    ofs += 8191;
+                }
+            }
+            len += 1;
+            if (type == Constants.LZ_IMAGE_TYPE_RGBA)
+                len += 2;
+
+            ofs += 1;
+
+            ref -= ofs;
+            if (ref == (op - 1)) {
+                var b = ref;
+                for (; len; --len) {
+                    if (type == Constants.LZ_IMAGE_TYPE_RGBA)
+                    {
+                        out_buf[(op*4) + 3] = out_buf[(b*4)+3];
+                    }
+                    else
+                    {
+                        for (i = 0; i < 4; i++)
+                            out_buf[(op*4) + i] = out_buf[(b*4)+i];
+                    }
+                    op++;
+                }
+            } else {
+                for (; len; --len) {
+                    if (type == Constants.LZ_IMAGE_TYPE_RGBA)
+                    {
+                        out_buf[(op*4) + 3] = out_buf[(ref*4)+3];
+                    }
+                    else
+                    {
+                        for (i = 0; i < 4; i++)
+                            out_buf[(op*4) + i] = out_buf[(ref*4)+i];
+                    }
+                    op++; ref++;
+                }
+            }
+        } else {
+            ctrl++;
+
+            if (type == Constants.LZ_IMAGE_TYPE_RGBA)
+            {
+                out_buf[(op*4) + 3] = in_buf[encoder++];
+            }
+            else
+            {
+                out_buf[(op*4) + 0] = in_buf[encoder + 2];
+                out_buf[(op*4) + 1] = in_buf[encoder + 1];
+                out_buf[(op*4) + 2] = in_buf[encoder + 0];
+                if (default_alpha)
+                    out_buf[(op*4) + 3] = 255;
+                encoder += 3;
+            }
+            op++;
+
+
+            for (--ctrl; ctrl; ctrl--) {
+                if (type == Constants.LZ_IMAGE_TYPE_RGBA)
+                {
+                    out_buf[(op*4) + 3] = in_buf[encoder++];
+                }
+                else
+                {
+                    out_buf[(op*4) + 0] = in_buf[encoder + 2];
+                    out_buf[(op*4) + 1] = in_buf[encoder + 1];
+                    out_buf[(op*4) + 2] = in_buf[encoder + 0];
+                    if (default_alpha)
+                        out_buf[(op*4) + 3] = 255;
+                    encoder += 3;
+                }
+                op++;
+            }
+        }
+
+    }
+    return encoder - 1;
+}
+
+function flip_image_data(img)
+{
+    var wb = img.width * 4;
+    var h = img.height;
+    var temp_h = h;
+    var buff = new Uint8Array(img.width * img.height * 4);
+    while (temp_h--)
+    {
+        buff.set(img.data.subarray(temp_h * wb, (temp_h + 1) * wb), (h - temp_h - 1) * wb);
+    }
+    img.data.set(buff);
+}
+
+function convert_spice_lz_to_web(context, lz_image)
+{
+    var at;
+    if (lz_image.type === Constants.LZ_IMAGE_TYPE_RGB32 || lz_image.type === Constants.LZ_IMAGE_TYPE_RGBA)
+    {
+        var u8 = new Uint8Array(lz_image.data);
+        var ret = context.createImageData(lz_image.width, lz_image.height);
+
+        at = lz_rgb32_decompress(u8, 0, ret.data, Constants.LZ_IMAGE_TYPE_RGB32, lz_image.type != Constants.LZ_IMAGE_TYPE_RGBA);
+        if (!lz_image.top_down)
+            flip_image_data(ret);
+
+        if (lz_image.type == Constants.LZ_IMAGE_TYPE_RGBA)
+            lz_rgb32_decompress(u8, at, ret.data, Constants.LZ_IMAGE_TYPE_RGBA, false);
+    }
+    else if (lz_image.type === Constants.LZ_IMAGE_TYPE_XXXA)
+    {
+        var u8 = new Uint8Array(lz_image.data);
+        var ret = context.createImageData(lz_image.width, lz_image.height);
+        lz_rgb32_decompress(u8, 0, ret.data, Constants.LZ_IMAGE_TYPE_RGBA, false);
+    }
+    else
+        return undefined;
+
+    return ret;
+}
+
+export {
+  convert_spice_lz_to_web,
+};
@@ -0,0 +1,9 @@
+// Types for what Ham Lab uses of the vendored spice-html5 (plain JavaScript beside this file).
+export class SpiceMainConn {
+  constructor(opts: { uri: string; screen_id: string; password?: string; message_id?: string; dump_id?: string; onerror?: (e: Event | Error) => void; onsuccess?: () => void; onagent?: (sc: SpiceMainConn) => void })
+  stop(msg?: string): void
+  agent_connected?: boolean
+}
+export function resize_helper(sc: SpiceMainConn): void
+export function handle_resize(e?: Event): void
+export function sendCtrlAltDel(sc: SpiceMainConn): void
@@ -0,0 +1,669 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import * as Messages from './spicemsg.js';
+import { Constants } from './enums.js';
+import { SpiceCursorConn } from './cursor.js';
+import { SpiceConn } from './spiceconn.js';
+import { DEBUG } from './utils.js';
+import { SpiceFileXferTask } from './filexfer.js';
+import { SpiceInputsConn, sendCtrlAltDel, typeText } from './inputs.js';
+import { SpiceDisplayConn } from './display.js';
+import { SpicePlaybackConn } from './playback.js';
+import { SpicePortConn } from './port.js';
+import { handle_file_dragover, handle_file_drop } from './filexfer.js';
+import { resize_helper, handle_resize } from './resize.js';
+
+/*----------------------------------------------------------------------------
+**  SpiceMainConn
+**      This is the master Javascript class for establishing and
+**  managing a connection to a Spice Server.
+**
+**      Invocation:  You must pass an object with properties as follows:
+**          uri         (required)  Uri of a WebSocket listener that is
+**                                  connected to a spice server.
+**          password    (required)  Password to send to the spice server
+**          message_id  (optional)  Identifier of an element in the DOM
+**                                  where SpiceConn will write messages.
+**                                  It will use classes spice-messages-x,
+**                                  where x is one of info, warning, or error.
+**          screen_id   (optional)  Identifier of an element in the DOM
+**                                  where SpiceConn will create any new
+**                                  client screens.  This is the main UI.
+**          dump_id     (optional)  If given, an element to use for
+**                                  dumping every single image + canvas drawn.
+**                                  Sometimes useful for debugging.
+**          onerror     (optional)  If given, a function to receive async
+**                                  errors.  Note that you should also catch
+**                                  errors for ones that occur inline
+**          onagent     (optional)  If given, a function to be called when
+**                                  a VD agent is connected; a good opportunity
+**                                  to request a resize
+**          onsuccess   (optional)  If given, a function to be called when the
+**                                  session is successfully connected
+**
+**  Throws error if there are troubles.  Requires a modern (by 2012 standards)
+**      browser, including WebSocket and WebSocket.binaryType == arraybuffer
+**
+**--------------------------------------------------------------------------*/
+function SpiceMainConn()
+{
+    if (typeof WebSocket === "undefined")
+        throw new Error("WebSocket unavailable.  You need to use a different browser.");
+
+    SpiceConn.apply(this, arguments);
+
+    this.agent_msg_queue = [];
+    this.file_xfer_tasks = {};
+    this.file_xfer_task_id = 0;
+    this.file_xfer_read_queue = [];
+    this.ports = [];
+    this.agent_caps = [0]
+}
+
+SpiceMainConn.prototype = Object.create(SpiceConn.prototype);
+SpiceMainConn.prototype.process_channel_message = function(msg)
+{
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_BEGIN)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate Begin");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_CANCEL)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate Cancel");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_INIT)
+    {
+        this.log_info("Connected to " + this.ws.url);
+        this.report_success("Connected")
+        this.main_init = new Messages.SpiceMsgMainInit(msg.data);
+        this.connection_id = this.main_init.session_id;
+        this.agent_tokens = this.main_init.agent_tokens;
+
+        if (DEBUG > 0)
+        {
+            // FIXME - there is a lot here we don't handle; mouse modes, agent,
+            //          ram_hint, multi_media_time
+            this.log_info("session id "                 + this.main_init.session_id +
+                          " ; display_channels_hint "   + this.main_init.display_channels_hint +
+                          " ; supported_mouse_modes "   + this.main_init.supported_mouse_modes +
+                          " ; current_mouse_mode "      + this.main_init.current_mouse_mode +
+                          " ; agent_connected "         + this.main_init.agent_connected +
+                          " ; agent_tokens "            + this.main_init.agent_tokens +
+                          " ; multi_media_time "        + this.main_init.multi_media_time +
+                          " ; ram_hint "                + this.main_init.ram_hint);
+        }
+
+        this.our_mm_time = Date.now();
+        this.mm_time = this.main_init.multi_media_time;
+
+        this.handle_mouse_mode(this.main_init.current_mouse_mode,
+                               this.main_init.supported_mouse_modes);
+
+        if (this.main_init.agent_connected)
+            this.connect_agent();
+
+        var attach = new Messages.SpiceMiniData;
+        attach.type = Constants.SPICE_MSGC_MAIN_ATTACH_CHANNELS;
+        attach.size = attach.buffer_size();
+        this.send_msg(attach);
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MOUSE_MODE)
+    {
+        var mode = new Messages.SpiceMsgMainMouseMode(msg.data);
+        DEBUG > 0 && this.log_info("Mouse supported modes " + mode.supported_modes + "; current " + mode.current_mode);
+        this.handle_mouse_mode(mode.current_mode, mode.supported_modes);
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MULTI_MEDIA_TIME)
+    {
+        /* The server's multimedia clock. relative_now() estimates it from
+           the value seeded at INIT plus elapsed wall time, which drifts as
+           the two clocks diverge, and stream frames are scheduled and
+           reported against that estimate. This message is the server
+           resynchronising it. */
+        var mm = new Messages.SpiceMsgMainMultiMediaTime(msg.data);
+        this.our_mm_time = Date.now();
+        this.mm_time = mm.time;
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_CHANNELS_LIST)
+    {
+        var i;
+        var chans;
+        DEBUG > 0 && console.log("channels");
+        chans = new Messages.SpiceMsgChannels(msg.data);
+        for (i = 0; i < chans.channels.length; i++)
+        {
+            var conn = {
+                        uri: this.ws.url,
+                        parent: this,
+                        connection_id : this.connection_id,
+                        type : chans.channels[i].type,
+                        chan_id : chans.channels[i].id
+                    };
+            if (chans.channels[i].type == Constants.SPICE_CHANNEL_DISPLAY)
+            {
+                if (chans.channels[i].id == 0) {
+                    this.display = new SpiceDisplayConn(conn);
+                } else {
+                    this.log_warn("The spice-html5 client does not handle multiple heads.");
+                }
+            }
+            else if (chans.channels[i].type == Constants.SPICE_CHANNEL_INPUTS)
+            {
+                this.inputs = new SpiceInputsConn(conn);
+                this.inputs.mouse_mode = this.mouse_mode;
+            }
+            else if (chans.channels[i].type == Constants.SPICE_CHANNEL_CURSOR)
+                this.cursor = new SpiceCursorConn(conn);
+            else if (chans.channels[i].type == Constants.SPICE_CHANNEL_PLAYBACK)
+                this.playback = new SpicePlaybackConn(conn);
+            else if (chans.channels[i].type == Constants.SPICE_CHANNEL_PORT)
+                this.ports.push(new SpicePortConn(conn));
+            else
+            {
+                if (! ("extra_channels" in this))
+                    this.extra_channels = [];
+                this.extra_channels[i] = new SpiceConn(conn);
+                this.log_err("Channel type " + this.extra_channels[i].channel_type() + " not implemented");
+            }
+
+        }
+
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_AGENT_CONNECTED)
+    {
+        this.connect_agent();
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_AGENT_CONNECTED_TOKENS)
+    {
+        var connected_tokens = new Messages.SpiceMsgMainAgentTokens(msg.data);
+        this.agent_tokens = connected_tokens.num_tokens;
+        this.connect_agent();
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_AGENT_TOKEN)
+    {
+        var remaining_tokens, tokens = new Messages.SpiceMsgMainAgentTokens(msg.data);
+        this.agent_tokens += tokens.num_tokens;
+        this.send_agent_message_queue();
+
+        remaining_tokens = this.agent_tokens;
+        while (remaining_tokens > 0 && this.file_xfer_read_queue.length > 0)
+        {
+            var xfer_task = this.file_xfer_read_queue.shift();
+            this.file_xfer_read(xfer_task, xfer_task.read_bytes);
+            remaining_tokens--;
+        }
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_AGENT_DISCONNECTED)
+    {
+        this.agent_connected = false;
+
+        /* Fail transfers in flight rather than strand them: with the
+           agent gone their chunks are silently dropped, so they would
+           never complete, never error, and their progress bars would sit
+           on screen forever. */
+        this.agent_msg_queue = [];
+        this.file_xfer_read_queue = [];
+        for (var task_id in this.file_xfer_tasks)
+            this.file_xfer_completed(this.file_xfer_tasks[task_id],
+                new Error("Agent disconnected; file transfer aborted."));
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_AGENT_DATA)
+    {
+        var agent_data = new Messages.SpiceMsgMainAgentData(msg.data);
+        if (agent_data.type == Constants.VD_AGENT_ANNOUNCE_CAPABILITIES)
+        {
+            var agent_caps = new Messages.VDAgentAnnounceCapabilities(agent_data.data);
+            this.agent_caps = [agent_caps.caps];
+            if (agent_caps.request)
+                this.announce_agent_capabilities(0);
+            return true;
+        }
+        else if (agent_data.type == Constants.VD_AGENT_FILE_XFER_STATUS)
+        {
+            this.handle_file_xfer_status(new Messages.VDAgentFileXferStatusMessage(agent_data.data));
+            return true;
+        }
+        else if (agent_data.type == Constants.VD_AGENT_CLIPBOARD_GRAB)
+        {
+            this.handle_clipboard_grab();
+            return true;
+        }
+        else if (agent_data.type == Constants.VD_AGENT_CLIPBOARD)
+        {
+            this.handle_clipboard_receive(agent_data);
+            return true;
+        }
+        else if (agent_data.type == Constants.VD_AGENT_CLIPBOARD_REQUEST)
+        {
+            this.handle_clipboard_send();
+            return true;
+        }
+        else if (agent_data.type == Constants.VD_AGENT_CLIPBOARD_RELEASE)
+        {
+            // Currently we don't need to do anything when the agent releases the clipboard
+            return true;
+        }
+
+        /* An agent message we do not act on is still an agent message.
+           Returning false sent it back as an unhandled main-channel
+           message, so the console reported "Unknown message type 109"
+           -- naming the agent-data envelope rather than the thing
+           inside it, which is the part worth knowing. Name that once
+           per type instead. */
+        this.report_unhandled_agent_message(agent_data.type);
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_SWITCH_HOST)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate Switch Host");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_END)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate End");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_NAME)
+    {
+        this.known_unimplemented(msg.type, "Main Name");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_UUID)
+    {
+        this.known_unimplemented(msg.type, "Main UUID");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_BEGIN_SEAMLESS)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate Begin Seamless");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_DST_SEAMLESS_ACK)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate Dst Seamless ACK");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_MAIN_MIGRATE_DST_SEAMLESS_NACK)
+    {
+        this.known_unimplemented(msg.type, "Main Migrate Dst Seamless NACK");
+        return true;
+    }
+
+    return false;
+}
+
+SpiceMainConn.prototype.stop = function(msg)
+{
+    this.state = "closing";
+
+    if (this.inputs)
+    {
+        this.inputs.cleanup();
+        this.inputs = undefined;
+    }
+
+    if (this.cursor)
+    {
+        this.cursor.cleanup();
+        this.cursor = undefined;
+    }
+
+    if (this.playback)
+    {
+        this.playback.cleanup();
+        this.playback = undefined;
+    }
+
+    for (var p = 0; p < this.ports.length; p++)
+        this.ports[p].cleanup();
+    this.ports = [];
+
+    if (this.display)
+    {
+        this.display.cleanup();
+        this.display.destroy_surfaces();
+        this.display = undefined;
+    }
+
+    this.cleanup();
+
+    if ("extra_channels" in this)
+        for (var e in this.extra_channels)
+            this.extra_channels[e].cleanup();
+    this.extra_channels = undefined;
+}
+
+SpiceMainConn.prototype.send_agent_message_queue = function(message)
+{
+    if (!this.agent_connected)
+        return;
+
+    if (message)
+        this.agent_msg_queue.push(message);
+
+    while (this.agent_tokens > 0 && this.agent_msg_queue.length > 0)
+    {
+        var mr = this.agent_msg_queue.shift();
+        this.send_msg(mr);
+        this.agent_tokens--;
+    }
+}
+
+SpiceMainConn.prototype.send_agent_message = function(type, message)
+{
+    var agent_data = new Messages.SpiceMsgcMainAgentData(type, message);
+    var sb = 0, maxsize = Constants.VD_AGENT_MAX_DATA_SIZE - Messages.SpiceMiniData.prototype.buffer_size();
+    var data = new ArrayBuffer(agent_data.buffer_size());
+    agent_data.to_buffer(data);
+    while (sb < agent_data.buffer_size())
+    {
+        var eb = Math.min(sb + maxsize, agent_data.buffer_size());
+        var mr = new Messages.SpiceMiniData();
+        mr.type = Constants.SPICE_MSGC_MAIN_AGENT_DATA;
+        mr.size = eb - sb;
+        mr.data = data.slice(sb, eb);
+        this.send_agent_message_queue(mr);
+        sb = eb;
+    }
+}
+
+SpiceMainConn.prototype.announce_agent_capabilities = function(request)
+{
+    var caps = new Messages.VDAgentAnnounceCapabilities(request, (1 << Constants.VD_AGENT_CAP_MOUSE_STATE) |
+                                                        (1 << Constants.VD_AGENT_CAP_MONITORS_CONFIG) |
+                                                        (1 << Constants.VD_AGENT_CAP_REPLY) |
+                                                        (1 << Constants.VD_AGENT_CAP_CLIPBOARD_SELECTION) |
+                                                        (1 << Constants.VD_AGENT_CAP_CLIPBOARD_BY_DEMAND));
+    this.send_agent_message(Constants.VD_AGENT_ANNOUNCE_CAPABILITIES, caps);
+}
+
+SpiceMainConn.prototype.resize_window = function(flags, width, height, depth, x, y)
+{
+    var monitors_config = new Messages.VDAgentMonitorsConfig(flags, width, height, depth, x, y);
+    this.send_agent_message(Constants.VD_AGENT_MONITORS_CONFIG, monitors_config);
+}
+
+SpiceMainConn.prototype.file_xfer_start = function(file)
+{
+    var task_id, xfer_start, task;
+
+    task_id = this.file_xfer_task_id++;
+    task = new SpiceFileXferTask(task_id, file);
+    task.create_progressbar();
+    this.file_xfer_tasks[task_id] = task;
+    xfer_start = new Messages.VDAgentFileXferStartMessage(task_id, file.name, file.size);
+    this.send_agent_message(Constants.VD_AGENT_FILE_XFER_START, xfer_start);
+}
+
+SpiceMainConn.prototype.handle_file_xfer_status = function(file_xfer_status)
+{
+    var xfer_error, xfer_task;
+    if (!this.file_xfer_tasks[file_xfer_status.id])
+    {
+        return;
+    }
+    xfer_task = this.file_xfer_tasks[file_xfer_status.id];
+    switch (file_xfer_status.result)
+    {
+        case Constants.VD_AGENT_FILE_XFER_STATUS_CAN_SEND_DATA:
+            this.file_xfer_read(xfer_task);
+            return;
+        case Constants.VD_AGENT_FILE_XFER_STATUS_CANCELLED:
+            xfer_error = "transfer is cancelled by spice agent";
+            break;
+        case Constants.VD_AGENT_FILE_XFER_STATUS_ERROR:
+            xfer_error = "some errors occurred in the spice agent";
+            break;
+        case Constants.VD_AGENT_FILE_XFER_STATUS_SUCCESS:
+            break;
+        default:
+            xfer_error = "unhandled status type: " + file_xfer_status.result;
+            break;
+    }
+
+    this.file_xfer_completed(xfer_task, xfer_error)
+}
+
+SpiceMainConn.prototype.file_xfer_read = function(file_xfer_task, start_byte)
+{
+    var FILE_XFER_CHUNK_SIZE = 32 * Constants.VD_AGENT_MAX_DATA_SIZE;
+    var _this = this;
+    var sb, eb;
+    var slice, reader;
+
+    if (!file_xfer_task ||
+        !this.file_xfer_tasks[file_xfer_task.id] ||
+        (start_byte > 0 && start_byte == file_xfer_task.file.size))
+    {
+        return;
+    }
+
+    if (file_xfer_task.cancelled)
+    {
+        var xfer_status = new Messages.VDAgentFileXferStatusMessage(file_xfer_task.id,
+                                                           Constants.VD_AGENT_FILE_XFER_STATUS_CANCELLED);
+        this.send_agent_message(Constants.VD_AGENT_FILE_XFER_STATUS, xfer_status);
+        delete this.file_xfer_tasks[file_xfer_task.id];
+        return;
+    }
+
+    sb = start_byte || 0,
+    eb = Math.min(sb + FILE_XFER_CHUNK_SIZE, file_xfer_task.file.size);
+
+    if (!this.agent_tokens)
+    {
+        file_xfer_task.read_bytes = sb;
+        this.file_xfer_read_queue.push(file_xfer_task);
+        return;
+    }
+
+    reader = new FileReader();
+    reader.onload = function(e)
+    {
+        var xfer_data = new Messages.VDAgentFileXferDataMessage(file_xfer_task.id,
+                                                       e.target.result.byteLength,
+                                                       e.target.result);
+        _this.send_agent_message(Constants.VD_AGENT_FILE_XFER_DATA, xfer_data);
+        /* Only recurse while bytes remain.  The old code always recursed
+           and relied on the start_byte > 0 guard above to terminate, which
+           a zero-byte file never satisfies — it looped forever, burning an
+           agent token per iteration. */
+        if (eb < file_xfer_task.file.size)
+            _this.file_xfer_read(file_xfer_task, eb);
+        file_xfer_task.update_progressbar(eb);
+    };
+
+    slice = file_xfer_task.file.slice(sb, eb);
+    reader.readAsArrayBuffer(slice);
+}
+
+SpiceMainConn.prototype.file_xfer_completed = function(file_xfer_task, error)
+{
+    if (error)
+        this.log_err(error);
+    else
+        this.log_info("transfer of '" + file_xfer_task.file.name +"' was successful");
+
+    file_xfer_task.remove_progressbar();
+
+    delete this.file_xfer_tasks[file_xfer_task.id];
+}
+
+/* The guest agent sends more than this client acts on -- a reply
+   acknowledging our capabilities, mouse state under server mouse mode,
+   monitor and display configuration. None need handling, but each was
+   arriving as an anonymous "unknown message" on the main channel. */
+SpiceMainConn.prototype.report_unhandled_agent_message = function(type)
+{
+    var names = {};
+    names[Constants.VD_AGENT_MOUSE_STATE] = "Mouse State";
+    names[Constants.VD_AGENT_MONITORS_CONFIG] = "Monitors Config";
+    names[Constants.VD_AGENT_REPLY] = "Reply";
+    names[Constants.VD_AGENT_DISPLAY_CONFIG] = "Display Config";
+    names[Constants.VD_AGENT_FILE_XFER_START] = "File Xfer Start";
+    names[Constants.VD_AGENT_FILE_XFER_DATA] = "File Xfer Data";
+    names[Constants.VD_AGENT_CLIENT_DISCONNECTED] = "Client Disconnected";
+    names[Constants.VD_AGENT_MAX_CLIPBOARD] = "Max Clipboard";
+
+    if (! this.reported_agent_types)
+        this.reported_agent_types = {};
+    if (this.reported_agent_types[type])
+        return;
+    this.reported_agent_types[type] = true;
+
+    this.log_warn("Agent message not handled: " + (names[type] || "type " + type) +
+                  " [ further notices suppressed ]");
+}
+
+SpiceMainConn.prototype.handle_clipboard_grab = function()
+{
+    DEBUG > 1 && console.log("handling clipboard grab from agent");
+
+    // agent is requesting clipboard grab, so we send a message to request clipboard contents
+    const type = Constants.VD_AGENT_CLIPBOARD_UTF8_TEXT;
+    const clipboard_request = new Messages.SpiceMsgClipboardRequest(type, this.agent_caps);
+    this.send_agent_message(Constants.VD_AGENT_CLIPBOARD_REQUEST, clipboard_request);
+}
+
+SpiceMainConn.prototype.handle_clipboard_receive = function(agent_data)
+{
+    DEBUG > 1 && console.log("received clipboard data from agent");
+
+    // received clipboard data from agent, copy it to browser clipboard
+    const received_clipboard = new Messages.SpiceMsgClipboardReceive(agent_data, this.agent_caps);
+    if (received_clipboard.type === Constants.VD_AGENT_CLIPBOARD_UTF8_TEXT)
+    {
+        // write it to the browser clipboard
+        if (navigator.clipboard && navigator.clipboard.writeText)
+        {
+            const text = received_clipboard.get_text();
+            navigator.clipboard.writeText(text).catch(err => {
+                console.warn("Failed to write to navigator clipboard:", err);
+            });
+        }
+    }
+    else
+    {
+        console.log("Unsupported clipboard type:", received_clipboard.type);
+    }
+}
+
+SpiceMainConn.prototype.handle_clipboard_send = function()
+{
+    DEBUG > 1 && console.log("sending clipboard data to agent");
+
+    // agent is requesting clipboard data, read it from browser clipboard and send it.
+    if (navigator.clipboard && navigator.clipboard.readText)
+    {
+        navigator.clipboard.readText().then(text => {
+            const type = Constants.VD_AGENT_CLIPBOARD_UTF8_TEXT;
+            const clipboard_msg = new Messages.SpiceMsgClipboardSend(type, text, this.agent_caps);
+            this.send_agent_message(Constants.VD_AGENT_CLIPBOARD, clipboard_msg);
+        }).catch(err => {
+            console.log("Failed to read clipboard:", err);
+        });
+    }
+}
+
+SpiceMainConn.prototype.send_clipboard_grab = function()
+{
+    DEBUG > 1 && console.log("browser is asking agent to grab clipboard");
+
+    // Send clipboard grab to agent. Agent will then ask for the host os clipboard contents in a dedicated message.
+    const type = Constants.VD_AGENT_CLIPBOARD_UTF8_TEXT;
+    const grab_message = new Messages.SpiceMsgClipboardGrab(type, this.agent_caps);
+    this.send_agent_message(Constants.VD_AGENT_CLIPBOARD_GRAB, grab_message)
+}
+
+SpiceMainConn.prototype.connect_agent = function()
+{
+    this.agent_connected = true;
+
+    var agent_start = new Messages.SpiceMsgcMainAgentStart(~0);
+    var mr = new Messages.SpiceMiniData();
+    mr.build_msg(Constants.SPICE_MSGC_MAIN_AGENT_START, agent_start);
+    this.send_msg(mr);
+
+    this.announce_agent_capabilities(1);
+
+    if (this.onagent !== undefined)
+        this.onagent(this);
+
+}
+
+SpiceMainConn.prototype.handle_mouse_mode = function(current, supported)
+{
+    this.mouse_mode = current;
+    if (current != Constants.SPICE_MOUSE_MODE_CLIENT && (supported & Constants.SPICE_MOUSE_MODE_CLIENT))
+    {
+        var mode_request = new Messages.SpiceMsgcMainMouseModeRequest(Constants.SPICE_MOUSE_MODE_CLIENT);
+        var mr = new Messages.SpiceMiniData();
+        mr.build_msg(Constants.SPICE_MSGC_MAIN_MOUSE_MODE_REQUEST, mode_request);
+        this.send_msg(mr);
+    }
+
+    if (this.inputs)
+        this.inputs.mouse_mode = current;
+}
+
+/* Shift current time to attempt to get a time matching that of the server */
+SpiceMainConn.prototype.relative_now = function()
+{
+    var ret = (Date.now() - this.our_mm_time) + this.mm_time;
+    return ret;
+}
+
+export {
+  SpiceMainConn,
+  handle_file_dragover,
+  handle_file_drop,
+  resize_helper,
+  handle_resize,
+  sendCtrlAltDel,
+  typeText,
+};
@@ -0,0 +1,432 @@
+"use strict";
+/*
+   Copyright (C) 2014 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  SpicePlaybackConn
+**      Drive the Spice Playback channel (sound out)
+**--------------------------------------------------------------------------*/
+
+import * as Utils from './utils.js';
+import * as Webm from './webm.js';
+import * as Messages from './spicemsg.js';
+import { Constants } from './enums.js';
+import { SpiceConn } from './spiceconn.js';
+
+function SpicePlaybackConn()
+{
+    SpiceConn.apply(this, arguments);
+
+    this.queue = new Array();
+    this.append_okay = false;
+    this.start_time = 0;
+}
+
+SpicePlaybackConn.prototype = Object.create(SpiceConn.prototype);
+SpicePlaybackConn.prototype.process_channel_message = function(msg)
+{
+    if (!window.MediaSource)
+    {
+        this.log_err('MediaSource API is not available');
+        return false;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_START)
+    {
+        var start = new Messages.SpiceMsgPlaybackStart(msg.data);
+
+        Utils.PLAYBACK_DEBUG > 0 && console.log("PlaybackStart; frequency " + start.frequency);
+
+        if (start.frequency != Webm.Constants.OPUS_FREQUENCY)
+        {
+            this.log_err('This player cannot handle frequency ' + start.frequency);
+            return false;
+        }
+
+        if (start.channels != Webm.Constants.OPUS_CHANNELS)
+        {
+            this.log_err('This player cannot handle ' + start.channels + ' channels');
+            return false;
+        }
+
+        if (start.format != Constants.SPICE_AUDIO_FMT_S16)
+        {
+            this.log_err('This player cannot format ' + start.format);
+            return false;
+        }
+
+        /* Keyed on the audio element, not source_buffer: source_buffer is
+           only set asynchronously in handle_source_open, so a second START
+           arriving before sourceopen would stack a second audio element. */
+        if (! this.audio)
+        {
+            this.media_source = new MediaSource();
+            this.media_source.spiceconn = this;
+
+            this.audio = document.createElement("audio");
+            this.audio.spiceconn = this;
+            this.audio.setAttribute('autoplay', true);
+            this.audio.src = window.URL.createObjectURL(this.media_source);
+            document.getElementById(this.parent.screen_id).appendChild(this.audio);
+
+            this.media_source.addEventListener('sourceopen', handle_source_open, false);
+            this.media_source.addEventListener('sourceended', handle_source_ended, false);
+            this.media_source.addEventListener('sourceclosed', handle_source_closed, false);
+
+            this.bytes_written = 0;
+
+            return true;
+        }
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_DATA)
+    {
+        var data = new Messages.SpiceMsgPlaybackData(msg.data);
+
+        if (! this.source_buffer)
+            return true;
+
+        if (this.audio.readyState >= 3 && this.audio.buffered.length > 1 &&
+            this.audio.currentTime == this.audio.buffered.end(0) &&
+            this.audio.currentTime < this.audio.buffered.start(this.audio.buffered.length - 1))
+        {
+            console.log("Audio underrun: we appear to have fallen behind; advancing to " +
+                this.audio.buffered.start(this.audio.buffered.length - 1));
+            this.audio.currentTime = this.audio.buffered.start(this.audio.buffered.length - 1);
+        }
+
+        /* Around version 45, Firefox started being very particular about the
+           time stamps put into the Opus stream.  The time stamps from the Spice server are
+           somewhat irregular.  They mostly arrive every 10 ms, but sometimes it is 11, or sometimes
+           with two time stamps the same in a row.  The previous logic resulted in fuzzy and/or
+           distorted audio streams in Firefox in a row.
+
+           In theory, the sequence mode should be appropriate for us, but as of 09/27/2016,
+           I was unable to make sequence mode work with Firefox.
+
+           Thus, we end up with an inelegant hack.  Essentially, we force every packet to have
+           a 10ms time delta, unless there is an obvious gap in time stream, in which case we
+           will resync.
+        */
+
+        if (this.start_time != 0 && data.time != (this.last_data_time + Webm.Constants.EXPECTED_PACKET_DURATION))
+        {
+            if (Math.abs(data.time - (Webm.Constants.EXPECTED_PACKET_DURATION + this.last_data_time)) < Webm.Constants.MAX_CLUSTER_TIME)
+            {
+                Utils.PLAYBACK_DEBUG > 1 && console.log("Hacking time of " + data.time + " to " +
+                                      (this.last_data_time + Webm.Constants.EXPECTED_PACKET_DURATION));
+                data.time = this.last_data_time + Webm.Constants.EXPECTED_PACKET_DURATION;
+            }
+            else
+            {
+                Utils.PLAYBACK_DEBUG > 1 && console.log("Apparent gap in audio time; now is " + data.time + " last was " + this.last_data_time);
+            }
+        }
+
+        this.last_data_time = data.time;
+
+        Utils.PLAYBACK_DEBUG > 1 && console.log("PlaybackData; time " + data.time + "; length " + data.data.byteLength);
+
+        if (this.start_time == 0)
+            this.start_playback(data);
+
+        else if (data.time - this.cluster_time >= Webm.Constants.MAX_CLUSTER_TIME)
+            this.new_cluster(data);
+
+        else
+            this.simple_block(data, false);
+
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_MODE)
+    {
+        var mode = new Messages.SpiceMsgPlaybackMode(msg.data);
+        if (mode.mode != Constants.SPICE_AUDIO_DATA_MODE_OPUS)
+        {
+            this.log_err('This player cannot handle mode ' + mode.mode);
+            /* Deleting just source_buffer left the audio element and its
+               object URL orphaned with no guard left to reclaim them. */
+            this.destroy_audio();
+        }
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_STOP)
+    {
+        Utils.PLAYBACK_DEBUG > 0 && console.log("PlaybackStop");
+        if (this.audio)
+        {
+            this.destroy_audio();
+            return true;
+        }
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_VOLUME)
+    {
+        this.known_unimplemented(msg.type, "Playback Volume");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_MUTE)
+    {
+        this.known_unimplemented(msg.type, "Playback Mute");
+        return true;
+    }
+
+    if (msg.type == Constants.SPICE_MSG_PLAYBACK_LATENCY)
+    {
+        this.known_unimplemented(msg.type, "Playback Latency");
+        return true;
+    }
+
+    return false;
+}
+
+SpicePlaybackConn.prototype.destroy_audio = function()
+{
+    if (! this.audio)
+        return;
+
+    if (this.audio.parentNode)
+        this.audio.parentNode.removeChild(this.audio);
+    window.URL.revokeObjectURL(this.audio.src);
+
+    delete this.source_buffer;
+    delete this.media_source;
+    delete this.audio;
+
+    this.append_okay = false;
+    this.queue = new Array();
+    this.start_time = 0;
+}
+
+/* A client-side stop must reclaim the audio element, its object URL and
+   the MediaSource; without this they were only freed by a server STOP,
+   and an application that stops and recreates connections leaked one
+   set per cycle. */
+SpicePlaybackConn.prototype.cleanup = function()
+{
+    this.destroy_audio();
+    SpiceConn.prototype.cleanup.call(this);
+}
+
+SpicePlaybackConn.prototype.start_playback = function(data)
+{
+    this.start_time = data.time;
+
+    var h = new Webm.Header();
+    var te = new Webm.AudioTrackEntry;
+    var t = new Webm.Tracks(te);
+
+    var mb = new ArrayBuffer(h.buffer_size() + t.buffer_size())
+
+    this.bytes_written = h.to_buffer(mb);
+    this.bytes_written = t.to_buffer(mb, this.bytes_written);
+
+    this.source_buffer.addEventListener('error', handle_sourcebuffer_error, false);
+    this.source_buffer.addEventListener('updateend', handle_append_buffer_done, false);
+    playback_append_buffer(this, mb);
+
+    this.new_cluster(data);
+}
+
+SpicePlaybackConn.prototype.new_cluster = function(data)
+{
+    this.cluster_time = data.time;
+
+    var c = new Webm.Cluster(data.time - this.start_time);
+
+    var mb = new ArrayBuffer(c.buffer_size());
+    this.bytes_written += c.to_buffer(mb);
+
+    if (this.append_okay)
+        playback_append_buffer(this, mb);
+    else
+        this.queue.push(mb);
+
+    this.simple_block(data, true);
+}
+
+SpicePlaybackConn.prototype.simple_block = function(data, keyframe)
+{
+    var sb = new Webm.SimpleBlock(data.time - this.cluster_time, data.data, keyframe);
+    var mb = new ArrayBuffer(sb.buffer_size());
+
+    this.bytes_written += sb.to_buffer(mb);
+
+    if (this.append_okay)
+        playback_append_buffer(this, mb);
+    else
+        this.queue.push(mb);
+}
+
+function handle_source_open(e)
+{
+    var p = this.spiceconn;
+
+    if (p.source_buffer)
+        return;
+
+    p.source_buffer = this.addSourceBuffer(Webm.Constants.SPICE_PLAYBACK_CODEC);
+    if (! p.source_buffer)
+    {
+        p.log_err('Codec ' + Webm.Constants.SPICE_PLAYBACK_CODEC + ' not available.');
+        return;
+    }
+
+    if (Utils.PLAYBACK_DEBUG > 0)
+        playback_handle_event_debug.call(this, e);
+
+    listen_for_audio_events(p);
+
+    p.source_buffer.spiceconn = p;
+    p.source_buffer.mode = "segments";
+
+    // FIXME - Experimentation with segments and sequences was unsatisfying.
+    //         Switching to sequence did not solve our gap problem,
+    //         but the browsers didn't fully support the time seek capability
+    //         we would expect to gain from 'segments'.
+    //         Segments worked at the time of this patch, so segments it is for now.
+
+}
+
+function handle_source_ended(e)
+{
+    var p = this.spiceconn;
+    p.log_err('Audio source unexpectedly ended.');
+}
+
+function handle_source_closed(e)
+{
+    var p = this.spiceconn;
+    p.log_err('Audio source unexpectedly closed.');
+}
+
+function condense_playback_queue(queue)
+{
+    if (queue.length == 1)
+        return queue.shift();
+
+    var len = 0;
+    var i = 0;
+    for (i = 0; i < queue.length; i++)
+        len += queue[i].byteLength;
+
+    var mb = new ArrayBuffer(len);
+    var tmp = new Uint8Array(mb);
+    len = 0;
+    for (i = 0; i < queue.length; i++)
+    {
+        tmp.set(new Uint8Array(queue[i]), len);
+        len += queue[i].byteLength;
+    }
+    queue.length = 0;
+    return mb;
+}
+
+function handle_append_buffer_done(e)
+{
+    var p = this.spiceconn;
+
+    if (Utils.PLAYBACK_DEBUG > 1)
+        playback_handle_event_debug.call(this, e);
+
+    if (p.queue.length > 0)
+    {
+        var mb = condense_playback_queue(p.queue);
+        playback_append_buffer(p, mb);
+    }
+    else
+        p.append_okay = true;
+
+}
+
+function handle_sourcebuffer_error(e)
+{
+    var p = this.spiceconn;
+    p.log_err('source_buffer error ' + e.message);
+}
+
+function playback_append_buffer(p, b)
+{
+    try
+    {
+        p.source_buffer.appendBuffer(b);
+        p.append_okay = false;
+    }
+    catch (e)
+    {
+        p.log_err("Error invoking appendBuffer: " + e.message);
+    }
+}
+
+function playback_handle_event_debug(e)
+{
+    var p = this.spiceconn;
+    if (p.audio)
+    {
+        if (Utils.PLAYBACK_DEBUG > 0 || p.audio.buffered.len > 1)
+            console.log(p.audio.currentTime + ": event " + e.type +
+                Utils.dump_media_element(p.audio));
+    }
+
+    if (Utils.PLAYBACK_DEBUG > 1 && p.media_source)
+        console.log("  media_source " + Utils.dump_media_source(p.media_source));
+
+    if (Utils.PLAYBACK_DEBUG > 1 && p.source_buffer)
+        console.log("  source_buffer " + Utils.dump_source_buffer(p.source_buffer));
+
+    if (Utils.PLAYBACK_DEBUG > 0 || p.queue.length > 1)
+        console.log('  queue len ' + p.queue.length + '; append_okay: ' + p.append_okay);
+}
+
+function playback_debug_listen_for_one_event(name)
+{
+    this.addEventListener(name, playback_handle_event_debug);
+}
+
+function listen_for_audio_events(spiceconn)
+{
+    var audio_0_events = [
+        "abort", "error"
+    ];
+
+    var audio_1_events = [
+        "loadstart", "suspend", "emptied", "stalled", "loadedmetadata", "loadeddata", "canplay",
+        "canplaythrough", "playing", "waiting", "seeking", "seeked", "ended", "durationchange",
+        "timeupdate", "play", "pause", "ratechange"
+    ];
+
+    var audio_2_events = [
+        "progress",
+        "resize",
+        "volumechange"
+    ];
+
+    audio_0_events.forEach(playback_debug_listen_for_one_event, spiceconn.audio);
+    if (Utils.PLAYBACK_DEBUG > 0)
+        audio_1_events.forEach(playback_debug_listen_for_one_event, spiceconn.audio);
+    if (Utils.PLAYBACK_DEBUG > 1)
+        audio_2_events.forEach(playback_debug_listen_for_one_event, spiceconn.audio);
+}
+
+export {
+  SpicePlaybackConn,
+};
@@ -0,0 +1,271 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  crc logic from rfc2083 ported to Javascript
+**--------------------------------------------------------------------------*/
+
+var rfc2083_crc_table = Array(256);
+var rfc2083_crc_table_computed = 0;
+/* Make the table for a fast CRC. */
+function rfc2083_make_crc_table()
+{
+    var c;
+    var n, k;
+    for (n = 0; n < 256; n++)
+    {
+        c = n;
+        for (k = 0; k < 8; k++)
+        {
+            if (c & 1)
+                c = ((0xedb88320 ^ (c >>> 1)) >>> 0) & 0xffffffff;
+            else
+                c = c >>> 1;
+        }
+        rfc2083_crc_table[n] = c;
+    }
+
+    rfc2083_crc_table_computed = 1;
+}
+
+/* Update a running CRC with the bytes buf[0..len-1]--the CRC
+     should be initialized to all 1's, and the transmitted value
+     is the 1's complement of the final running CRC (see the
+     crc() routine below)). */
+
+function rfc2083_update_crc(crc, u8buf, at, len)
+{
+    var c = crc;
+    var n;
+
+    if (!rfc2083_crc_table_computed)
+        rfc2083_make_crc_table();
+
+    for (n = 0; n < len; n++)
+    {
+        c = rfc2083_crc_table[(c ^ u8buf[at + n]) & 0xff] ^ (c >>> 8);
+    }
+
+    return c;
+}
+
+function rfc2083_crc(u8buf, at, len)
+{
+    return rfc2083_update_crc(0xffffffff, u8buf, at, len) ^ 0xffffffff;
+}
+
+function crc32(mb, at, len)
+{
+    var u8 = new Uint8Array(mb);
+    return rfc2083_crc(u8, at, len);
+}
+
+function PngIHDR(width, height)
+{
+    this.width = width;
+    this.height = height;
+    this.depth = 8;
+    this.type = 6;
+    this.compression = 0;
+    this.filter = 0;
+    this.interlace = 0;
+}
+
+PngIHDR.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var orig = at;
+        var dv = new DataView(a);
+        dv.setUint32(at, this.buffer_size() - 12); at += 4;
+        dv.setUint8(at, 'I'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'H'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'D'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'R'.charCodeAt(0)); at++;
+        dv.setUint32(at, this.width); at += 4;
+        dv.setUint32(at, this.height); at += 4;
+        dv.setUint8(at, this.depth); at++;
+        dv.setUint8(at, this.type); at++;
+        dv.setUint8(at, this.compression); at++;
+        dv.setUint8(at, this.filter); at++;
+        dv.setUint8(at, this.interlace); at++;
+        dv.setUint32(at, crc32(a, orig + 4, this.buffer_size() - 8)); at += 4;
+        return at;
+    },
+    buffer_size: function()
+    {
+        return 12 + 13;
+    }
+}
+
+
+function adler()
+{
+    this.s1 = 1;
+    this.s2 = 0;
+}
+
+adler.prototype.update = function(b)
+{
+    this.s1 += b;
+    this.s1 %= 65521;
+    this.s2 += this.s1;
+    this.s2 %= 65521;
+}
+
+/* The image as one IDAT chunk: a zlib stream of stored (uncompressed)
+   deflate blocks.  A stored block holds at most 65535 bytes, so the
+   scanlines are cut into as many as it takes; a cursor larger than about
+   128 pixels square used to be refused here. */
+var STORED_BLOCK_MAX = 65535;
+
+function PngIDAT(width, height, bytes)
+{
+    this.data = bytes;
+    this.width = width;
+    this.height = height;
+    /* Every scanline is filter type 0 followed by its pixels. */
+    this.raw_size = this.height * (1 + this.width * 4);
+    this.blocks = Math.max(1, Math.ceil(this.raw_size / STORED_BLOCK_MAX));
+}
+
+PngIDAT.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var orig = at;
+        var x, y, i;
+        var dv = new DataView(a);
+        var zsum = new adler();
+        dv.setUint32(at, this.buffer_size() - 12); at += 4;
+        dv.setUint8(at, 'I'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'D'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'A'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'T'.charCodeAt(0)); at++;
+
+        /* zlib header: deflate, 32K window, no preset dictionary. */
+        dv.setUint8(at, 0x78); at++;
+        dv.setUint8(at, 0x01); at++;
+
+        var u8 = new Uint8Array(this.data);
+        var out = new Uint8Array(a);
+        var left = this.raw_size;
+        var block_left = 0;
+        var put = function(b)
+        {
+            if (block_left == 0)
+            {
+                /* Stored block: BFINAL in bit 0, BTYPE 00, then LEN and
+                   its one's complement, little-endian. */
+                block_left = Math.min(left, STORED_BLOCK_MAX);
+                out[at++] = left <= STORED_BLOCK_MAX ? 1 : 0;
+                out[at++] = block_left & 0xff;
+                out[at++] = block_left >> 8;
+                out[at++] = ~block_left & 0xff;
+                out[at++] = (~block_left >> 8) & 0xff;
+            }
+            out[at++] = b;
+            zsum.update(b);
+            block_left--;
+            left--;
+        };
+        for (i = 0, y = 0; y < this.height; y++)
+        {
+            put(0);
+            for (x = 0; x < this.width; x++)
+            {
+                put(u8[i] || 0); i++;
+                put(u8[i] || 0); i++;
+                put(u8[i] || 0); i++;
+                put(u8[i] || 0); i++;
+            }
+        }
+
+        /* zlib checksum, big-endian. */
+        dv.setUint16(at, zsum.s2); at += 2;
+        dv.setUint16(at, zsum.s1); at += 2;
+
+        dv.setUint32(at, crc32(a, orig + 4, this.buffer_size() - 8)); at += 4;
+        return at;
+    },
+    buffer_size: function()
+    {
+        return 12 + 2 + this.blocks * 5 + this.raw_size + 4;
+    }
+}
+
+
+function PngIEND()
+{
+}
+
+PngIEND.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var orig = at;
+        var dv = new DataView(a);
+        dv.setUint32(at, this.buffer_size() - 12); at += 4;
+        dv.setUint8(at, 'I'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'E'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'N'.charCodeAt(0)); at++;
+        dv.setUint8(at, 'D'.charCodeAt(0)); at++;
+        dv.setUint32(at, crc32(a, orig + 4, this.buffer_size() - 8)); at += 4;
+        return at;
+    },
+    buffer_size: function()
+    {
+        return 12;
+    }
+}
+
+
+function create_rgba_png(width, height, bytes)
+{
+    var i;
+    var ihdr = new PngIHDR(width, height);
+    var idat = new PngIDAT(width, height, bytes);
+    var iend = new PngIEND;
+
+    var mb = new ArrayBuffer(ihdr.buffer_size() + idat.buffer_size() + iend.buffer_size());
+    var at = ihdr.to_buffer(mb);
+    at = idat.to_buffer(mb, at);
+    at = iend.to_buffer(mb, at);
+
+    var u8 = new Uint8Array(mb);
+    var str = "";
+    for (i = 0; i < at; i++)
+    {
+        str += "%";
+        if (u8[i] < 16)
+            str += "0";
+        str += u8[i].toString(16);
+    }
+
+
+    return "%89PNG%0D%0A%1A%0A" + str;
+}
+
+export {
+  create_rgba_png,
+};
@@ -0,0 +1,94 @@
+"use strict";
+/*
+   Copyright (C) 2016 by Oliver Gutierrez <ogutsua@gmail.com>
+                         Miroslav Chodil <mchodil@redhat.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import { Constants } from './enums.js';
+import { DEBUG, arraybuffer_to_str } from './utils.js';
+import { SpiceConn } from './spiceconn.js';
+import { SpiceMsgPortInit } from './spicemsg.js';
+
+/*----------------------------------------------------------------------------
+**  SpicePortConn
+**      Drive the Spice Port Channel
+**--------------------------------------------------------------------------*/
+function SpicePortConn()
+{
+    DEBUG > 0 && console.log('SPICE port: created SPICE port channel. Args:', arguments);
+    SpiceConn.apply(this, arguments);
+    this.portName = null;
+}
+
+SpicePortConn.prototype = Object.create(SpiceConn.prototype);
+
+SpicePortConn.prototype.process_channel_message = function(msg)
+{
+    if (msg.type == Constants.SPICE_MSG_PORT_INIT)
+    {
+        if (this.portName === null)
+        {
+            var m = new SpiceMsgPortInit(msg.data);
+            this.portName = arraybuffer_to_str(new Uint8Array(m.name));
+            this.portOpened = m.opened
+            DEBUG > 0 && console.log('SPICE port: Port', this.portName, 'initialized');
+            return true;
+        }
+
+        DEBUG > 0 && console.log('SPICE port: Port', this.portName, 'is already initialized.');
+    }
+    else if (msg.type == Constants.SPICE_MSG_PORT_EVENT)
+    {
+        DEBUG > 0 && console.log('SPICE port: Port event received for', this.portName, msg);
+        var event = new CustomEvent('spice-port-event', {
+            detail: {
+                channel: this,
+                spiceEvent: new Uint8Array(msg.data)
+            },
+            bubbles: true,
+            cancelable: true
+        });
+
+        window.dispatchEvent(event);
+        return true;
+    }
+    else if (msg.type == Constants.SPICE_MSG_SPICEVMC_DATA)
+    {
+        DEBUG > 0 && console.log('SPICE port: Data received in port', this.portName, msg);
+        var event = new CustomEvent('spice-port-data', {
+            detail: {
+                channel: this,
+                data: msg.data
+            },
+            bubbles: true,
+            cancelable: true
+        });
+        window.dispatchEvent(event);
+        return true;
+    }
+    else
+    {
+        DEBUG > 0 && console.log('SPICE port: SPICE message type not recognized:', msg)
+    }
+
+    return false;
+};
+
+export {
+  SpicePortConn,
+};
@@ -0,0 +1,87 @@
+"use strict";
+/*
+   Copyright (C) 2014 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  resize.js
+**      This bit of Javascript is a set of logic to help with window
+**  resizing, using the agent channel to request screen resizes.
+**
+**  It's a bit tricky, as we want to wait for resizing to settle down
+**  before sending a size.  Further, while horizontal resizing to use the whole
+**  browser width is fairly easy to arrange with css, resizing an element to use
+**  the whole vertical space (or to force a middle div to consume the bulk of the browser
+**  window size) is tricky, and the consensus seems to be that Javascript is
+**  the only right way to do it.
+**--------------------------------------------------------------------------*/
+function resize_helper(sc)
+{
+    var w = document.getElementById(sc.screen_id).clientWidth;
+    var m = document.getElementById(sc.message_id);
+
+    /* Resize vertically; basically we leave a 20 pixel margin
+         at the bottom, and use the position of the message window
+         to figure out how to resize */
+
+    var h = window.innerHeight - 20;
+
+    /* Screen height based on message console visibility.  A hidden console
+       occupies no space, so only a visible one reduces the screen; its
+       offsetHeight already includes the client area, so subtract it once. */
+    if (m != null &&
+        window.getComputedStyle(m).getPropertyValue("display") != 'none')
+    {
+        h = h - m.offsetHeight;
+    }
+
+
+    /* Xorg requires height be a multiple of 8; round down */
+    if (h % 8 > 0)
+        h -= (h % 8);
+
+    /* Xorg requires width be a multiple of 8; round down */
+    if (w % 8 > 0)
+        w -= (w % 8);
+
+
+    sc.resize_window(0, w, h, 32, 0, 0);
+    sc.spice_resize_timer = undefined;
+}
+
+function handle_resize(e)
+{
+    var sc = window.spice_connection;
+
+    /* The listener can outlive the connection it was registered for. */
+    if (!sc)
+        return;
+
+    if (sc.spice_resize_timer)
+    {
+        window.clearTimeout(sc.spice_resize_timer);
+        sc.spice_resize_timer = undefined;
+    }
+
+    sc.spice_resize_timer = window.setTimeout(resize_helper, 200, sc);
+}
+
+export {
+  resize_helper,
+  handle_resize,
+};
@@ -0,0 +1,206 @@
+"use strict";
+/*
+   Copyright (C) 2013 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  SpiceSimulateCursor
+**      Internet Explorer 10 does not support data uri's in cursor assignment.
+**  This file provides a number of gimmicks to compensate.  First, if there
+**  is a preloaded cursor available, we will use that.  Failing that, we will
+**  simulate a cursor using an image that is moved around the screen.
+**--------------------------------------------------------------------------*/
+
+import { hex_sha1 } from './thirdparty/sha1.js';
+
+var SpiceSimulateCursor = {
+
+cursors : new Array(),
+unknown_cursors : new Array(),
+warned: false,
+
+add_cursor: function(sha1, value)
+{
+    SpiceSimulateCursor.cursors[sha1] = value;
+},
+
+unknown_cursor: function(sha1, curdata)
+{
+    if (! SpiceSimulateCursor.warned)
+    {
+        SpiceSimulateCursor.warned = true;
+        /* Once a modal alert; a console does not stop the session for it. */
+        console.warn("This browser does not take dynamic cursors; cursors will be " +
+                     "simulated with images.  See the console for how to supply static cursor files.");
+    }
+
+    if (! SpiceSimulateCursor.unknown_cursors[sha1])
+    {
+        SpiceSimulateCursor.unknown_cursors[sha1] = curdata;
+        console.log('Unknown cursor.  Simulation required.  To avoid simulation for this cursor, create and include a custom javascript file, and add the following line:');
+        console.log('SpiceSimulateCursor.add_cursor("' + sha1 + '", "<your filename here>.cur");');
+        console.log('And then run following command, redirecting output into <your filename here>.cur:');
+        console.log('php -r "echo urldecode(\'' + curdata + '\');"');
+    }
+},
+
+/* force: the browser cannot show this shape as a CSS cursor (too large),
+   so it is drawn under the pointer without consulting the computed style. */
+simulate_cursor: function (spicecursor, cursor, screen, pngstr, force)
+{
+    var cursor_sha = hex_sha1(pngstr + ' ' + cursor.header.hot_spot_x + ' ' + cursor.header.hot_spot_y);
+    if (! force && typeof SpiceSimulateCursor.cursors != 'undefined')
+        if (typeof SpiceSimulateCursor.cursors[cursor_sha] != 'undefined')
+        {
+            var curstr = 'url(' + SpiceSimulateCursor.cursors[cursor_sha] + '), default';
+            screen.style.cursor = curstr;
+        }
+
+    if (force || window.getComputedStyle(screen, null).cursor == 'auto')
+    {
+        if (! force)
+            SpiceSimulateCursor.unknown_cursor(cursor_sha,
+                SpiceSimulateCursor.create_icondir(cursor.header.width, cursor.header.height,
+                cursor.data.byteLength, cursor.header.hot_spot_x, cursor.header.hot_spot_y) + pngstr);
+
+        document.getElementById(spicecursor.parent.screen_id).style.cursor = 'none';
+        if (! spicecursor.spice_simulated_cursor)
+        {
+            spicecursor.spice_simulated_cursor = document.createElement('img');
+
+            spicecursor.spice_simulated_cursor.style.position = 'absolute';
+            spicecursor.spice_simulated_cursor.style.display = 'none';
+            spicecursor.spice_simulated_cursor.style.overflow = 'hidden';
+
+            spicecursor.spice_simulated_cursor.spice_screen = document.getElementById(spicecursor.parent.screen_id);
+
+            spicecursor.spice_simulated_cursor.addEventListener('mousemove', SpiceSimulateCursor.handle_sim_mousemove);
+
+            spicecursor.spice_simulated_cursor.spice_screen.appendChild(spicecursor.spice_simulated_cursor);
+        }
+
+        spicecursor.spice_simulated_cursor.src = 'data:image/png,' + pngstr;
+
+        spicecursor.spice_simulated_cursor.spice_hot_x = cursor.header.hot_spot_x;
+        spicecursor.spice_simulated_cursor.spice_hot_y = cursor.header.hot_spot_y;
+
+        spicecursor.spice_simulated_cursor.style.pointerEvents = "none";
+    }
+    else
+    {
+        if (spicecursor.spice_simulated_cursor)
+        {
+            spicecursor.spice_simulated_cursor.spice_screen.removeChild(spicecursor.spice_simulated_cursor);
+            delete spicecursor.spice_simulated_cursor;
+        }
+    }
+},
+
+handle_sim_mousemove: function(e)
+{
+    var f = SpiceSimulateCursor.duplicate_mouse_event(e, this.spice_screen);
+    return this.spice_screen.dispatchEvent(f);
+},
+
+duplicate_mouse_event: function(e, target)
+{
+    var evt = document.createEvent("mouseevent");
+    evt.initMouseEvent(e.type, true, true, e.view, e.detail,
+        e.screenX, e.screenY, e.clientX, e.clientY,
+        e.ctrlKey, e.altKey, e.shiftKey, e.metaKey, e.button, e.relatedTarget);
+    return evt;
+},
+
+ICONDIR: function ()
+{
+},
+
+ICONDIRENTRY: function(width, height, bytes, hot_x, hot_y)
+{
+    this.width = width;
+    this.height = height;
+    this.bytes = bytes;
+    this.hot_x = hot_x;
+    this.hot_y = hot_y;
+},
+
+
+create_icondir: function (width, height, bytes, hot_x, hot_y)
+{
+    var i;
+    var header = new SpiceSimulateCursor.ICONDIR();
+    var entry = new SpiceSimulateCursor.ICONDIRENTRY(width, height, bytes, hot_x, hot_y);
+
+    var mb = new ArrayBuffer(header.buffer_size() + entry.buffer_size());
+    var at = header.to_buffer(mb);
+    at = entry.to_buffer(mb, at);
+
+    var u8 = new Uint8Array(mb);
+    var str = "";
+    for (i = 0; i < at; i++)
+    {
+        str += "%";
+        if (u8[i] < 16)
+            str += "0";
+        str += u8[i].toString(16);
+    }
+    return str;
+},
+
+};
+
+SpiceSimulateCursor.ICONDIR.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        dv.setUint16(at, 0, true); at += 2;
+        dv.setUint16(at, 2, true); at += 2;
+        dv.setUint16(at, 1, true); at += 2;
+        return at;
+    },
+    buffer_size: function()
+    {
+        return 6;
+    }
+};
+
+SpiceSimulateCursor.ICONDIRENTRY.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        dv.setUint8(at, this.width); at++;
+        dv.setUint8(at, this.height); at++;
+        dv.setUint8(at, 0); at++;  /* color palette count, unused */
+        dv.setUint8(at, 0); at++;  /* reserved */
+        dv.setUint16(at, this.hot_x, true); at += 2;
+        dv.setUint16(at, this.hot_y, true); at += 2;
+        dv.setUint32(at, this.bytes, true); at += 4;
+        dv.setUint32(at, at + 4, true); at += 4;  /* Offset to bytes */
+        return at;
+    },
+    buffer_size: function()
+    {
+        return 16;
+    }
+};
+
+export { SpiceSimulateCursor };
@@ -0,0 +1,58 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  SpiceArrayBufferSlice
+**    This function is a work around for IE 10, which has no slice()
+**    method in it's subclass.
+**--------------------------------------------------------------------------*/
+function SpiceArrayBufferSlice(start, end)
+{
+    start = start || 0;
+    end = end || this.byteLength;
+    if (end < 0)
+        end = this.byteLength + end;
+    if (start < 0)
+        start = this.byteLength + start;
+    if (start < 0)
+        start = 0;
+    if (end < 0)
+        end = 0;
+    if (end > this.byteLength)
+        end = this.byteLength;
+    if (start > end)
+        start = end;
+
+    var ret = new ArrayBuffer(end - start);
+    var in1 = new Uint8Array(this, start, end - start);
+    var out = new Uint8Array(ret);
+    var i;
+
+    for (i = 0; i < end - start; i++)
+        out[i] = in1[i];
+
+    return ret;
+}
+
+if (! ArrayBuffer.prototype.slice)
+{
+    ArrayBuffer.prototype.slice = SpiceArrayBufferSlice;
+    console.log("WARNING:  ArrayBuffer.slice() is missing; we are extending ArrayBuffer to compensate");
+}
@@ -0,0 +1,557 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  SpiceConn
+**      This is the base Javascript class for establishing and
+**  managing a connection to a Spice Server.
+**  It is used to provide core functionality to the Spice main,
+**  display, inputs, and cursor channels.  See main.js for
+**  usage.
+**--------------------------------------------------------------------------*/
+
+import { Constants } from './enums.js';
+import { SpiceWireReader } from './wire.js';
+import {
+  SpiceLinkHeader,
+  SpiceLinkMess,
+  SpiceLinkReply,
+  SpiceLinkAuthTicket,
+  SpiceLinkAuthReply,
+  SpiceMiniData,
+  SpiceMsgcDisplayInit,
+  SpiceMsgSetAck,
+  SpiceMsgcAckSync,
+  SpiceMsgNotify,
+} from './spicemsg.js';
+import { DEBUG, hexdump_buffer } from './utils.js';
+import * as Webm from './webm.js';
+import { rsa_encrypt } from './ticket.js';
+
+function SpiceConn(o)
+{
+    if (o === undefined || o.uri === undefined || ! o.uri)
+        throw new Error("You must specify a uri");
+
+    this.ws = new WebSocket(o.uri, 'binary');
+
+    if (! this.ws.binaryType)
+        throw new Error("WebSocket doesn't support binaryType.  Try a different browser.");
+
+    this.connection_id = o.connection_id !== undefined ? o.connection_id : 0;
+    this.type = o.type !== undefined ? o.type : Constants.SPICE_CHANNEL_MAIN;
+    this.chan_id = o.chan_id !== undefined ? o.chan_id : 0;
+    if (o.parent !== undefined)
+    {
+        this.parent = o.parent;
+        this.message_id = o.parent.message_id;
+        this.password = o.parent.password;
+        /* Without this a child channel that dies mid-session (display,
+           inputs, cursor...) reports nothing: the close handler requires
+           an onerror, and report_error without one throws uncaught inside
+           a WebSocket event handler.  The application only ever hears
+           about the main channel. */
+        this.onerror = o.parent.onerror;
+    }
+    if (o.screen_id !== undefined)
+        this.screen_id = o.screen_id;
+    if (o.dump_id !== undefined)
+        this.dump_id = o.dump_id;
+    if (o.message_id !== undefined)
+        this.message_id = o.message_id;
+    if (o.password !== undefined)
+        this.password = o.password;
+    if (o.onerror !== undefined)
+        this.onerror = o.onerror;
+    if (o.onsuccess !== undefined)
+        this.onsuccess = o.onsuccess;
+    if (o.onagent !== undefined)
+        this.onagent = o.onagent;
+
+    this.state = "connecting";
+    this.ws.parent = this;
+    this.wire_reader = new SpiceWireReader(this, this.process_inbound);
+    this.messages_sent = 0;
+    this.warnings = [];
+
+    this.ws.addEventListener('open', function(e) {
+        DEBUG > 0 && console.log(">> WebSockets.onopen");
+        DEBUG > 0 && console.log("id " + this.parent.connection_id +"; type " + this.parent.type);
+
+        /***********************************************************************
+        **          WHERE IT ALL REALLY BEGINS
+        ***********************************************************************/
+        this.parent.send_hdr();
+        this.parent.wire_reader.request(SpiceLinkHeader.prototype.buffer_size());
+        this.parent.state = "start";
+    });
+    this.ws.addEventListener('error', function(e) {
+        if ('url' in e.target) {
+            this.parent.log_err("WebSocket error: Can't connect to websocket on URL: " + e.target.url);
+        }
+        this.parent.report_error(e);
+    });
+    this.ws.addEventListener('close', function(e) {
+        DEBUG > 0 && console.log(">> WebSockets.onclose");
+        DEBUG > 0 && console.log("id " + this.parent.connection_id +"; type " + this.parent.type);
+        DEBUG > 0 && console.log(e);
+        if (this.parent.state != "closing" && this.parent.state != "error" && this.parent.onerror !== undefined)
+        {
+            var e;
+            if (this.parent.state == "connecting")
+                e = new Error("Connection refused.");
+            else if (this.parent.state == "start" || this.parent.state == "link")
+                e = new Error("Unexpected protocol mismatch.");
+            else if (this.parent.state == "ticket")
+                e = new Error("Bad password.");
+            else
+                e = new Error("Unexpected close while " + this.parent.state);
+
+            this.parent.onerror(e);
+            this.parent.log_err(e.toString());
+        }
+    });
+
+    if (this.ws.readyState == 2 || this.ws.readyState == 3)
+        throw new Error("Unable to connect to " + o.uri);
+
+    this.timeout = window.setTimeout(spiceconn_timeout, Constants.SPICE_CONNECT_TIMEOUT, this);
+}
+
+SpiceConn.prototype =
+{
+    send_hdr : function ()
+    {
+        var hdr = new SpiceLinkHeader;
+        var msg = new SpiceLinkMess;
+
+        msg.connection_id = this.connection_id;
+        msg.channel_type = this.type;
+        msg.channel_id = this.chan_id;
+
+        msg.common_caps.push(
+            (1 << Constants.SPICE_COMMON_CAP_PROTOCOL_AUTH_SELECTION) |
+            (1 << Constants.SPICE_COMMON_CAP_MINI_HEADER)
+            );
+
+        if (msg.channel_type == Constants.SPICE_CHANNEL_PLAYBACK)
+        {
+            var caps = 0;
+            if ('MediaSource' in window && MediaSource.isTypeSupported(Webm.Constants.SPICE_PLAYBACK_CODEC))
+                caps |= (1 << Constants.SPICE_PLAYBACK_CAP_OPUS);
+            msg.channel_caps.push(caps);
+        }
+        else if (msg.channel_type == Constants.SPICE_CHANNEL_MAIN)
+        {
+            msg.channel_caps.push(
+                (1 << Constants.SPICE_MAIN_CAP_AGENT_CONNECTED_TOKENS)
+            );
+        }
+        else if (msg.channel_type == Constants.SPICE_CHANNEL_DISPLAY)
+        {
+            var caps =  (1 << Constants.SPICE_DISPLAY_CAP_SIZED_STREAM) |
+                        (1 << Constants.SPICE_DISPLAY_CAP_STREAM_REPORT) |
+                        (1 << Constants.SPICE_DISPLAY_CAP_MULTI_CODEC) |
+                        (1 << Constants.SPICE_DISPLAY_CAP_CODEC_MJPEG);
+            if ('MediaSource' in window && MediaSource.isTypeSupported(Webm.Constants.SPICE_VP8_CODEC))
+                caps |= (1 << Constants.SPICE_DISPLAY_CAP_CODEC_VP8);
+            msg.channel_caps.push(caps);
+        }
+
+        hdr.size = msg.buffer_size();
+
+        var mb = new ArrayBuffer(hdr.buffer_size() + msg.buffer_size());
+        hdr.to_buffer(mb);
+        msg.to_buffer(mb, hdr.buffer_size());
+
+        DEBUG > 1 && console.log("Sending header:");
+        DEBUG > 2 && hexdump_buffer(mb);
+        this.ws.send(mb);
+    },
+
+    send_ticket: function(ticket)
+    {
+        var hdr = new SpiceLinkAuthTicket();
+        hdr.auth_mechanism = Constants.SPICE_COMMON_CAP_AUTH_SPICE;
+        // FIXME - we need to implement RSA to make this work right
+        hdr.encrypted_data = ticket;
+        var mb = new ArrayBuffer(hdr.buffer_size());
+
+        hdr.to_buffer(mb);
+        DEBUG > 1 && console.log("Sending ticket:");
+        DEBUG > 2 && hexdump_buffer(mb);
+        this.ws.send(mb);
+    },
+
+    send_msg: function(msg)
+    {
+        var mb = new ArrayBuffer(msg.buffer_size());
+        msg.to_buffer(mb);
+        this.messages_sent++;
+        DEBUG > 0 && console.log(">> hdr " + this.channel_type() + " type " + msg.type + " size " + mb.byteLength);
+        DEBUG > 2 && hexdump_buffer(mb);
+        this.ws.send(mb);
+    },
+
+    process_inbound: function(mb, saved_header)
+    {
+        DEBUG > 2 && console.log(this.type + ": processing message of size " + mb.byteLength + "; state is " + this.state);
+        if (this.state == "ready")
+        {
+            if (saved_header == undefined)
+            {
+                var msg = new SpiceMiniData(mb);
+
+                if (msg.type > 500)
+                {
+                    if (DEBUG > 0)
+                    {
+                        alert("Something has gone very wrong; we think we have message of type " + msg.type);
+                        debugger;
+                    }
+                }
+
+                if (msg.size == 0)
+                {
+                    this.process_message(msg);
+                    this.wire_reader.request(SpiceMiniData.prototype.buffer_size());
+                }
+                else
+                {
+                    this.wire_reader.request(msg.size);
+                    this.wire_reader.save_header(msg);
+                }
+            }
+            else
+            {
+                saved_header.data = mb;
+                this.process_message(saved_header);
+                this.wire_reader.request(SpiceMiniData.prototype.buffer_size());
+                this.wire_reader.save_header(undefined);
+            }
+        }
+
+        else if (this.state == "start")
+        {
+            this.reply_hdr = new SpiceLinkHeader(mb);
+            if (this.reply_hdr.magic != Constants.SPICE_MAGIC)
+            {
+                this.state = "error";
+                var e = new Error('Error: magic mismatch: ' + this.reply_hdr.magic);
+                this.report_error(e);
+            }
+            else
+            {
+                // FIXME - Determine major/minor version requirements
+                this.wire_reader.request(this.reply_hdr.size);
+                this.state = "link";
+            }
+        }
+
+        else if (this.state == "link")
+        {
+            this.reply_link = new SpiceLinkReply(mb);
+             // FIXME - Screen the caps - require minihdr at least, right?
+            if (this.reply_link.error)
+            {
+                this.state = "error";
+                var e = new Error('Error: reply link error ' + this.reply_link.error);
+                this.report_error(e);
+            }
+            else
+            {
+                this.send_ticket(rsa_encrypt(this.reply_link.pub_key, this.password + String.fromCharCode(0)));
+                this.state = "ticket";
+                this.wire_reader.request(SpiceLinkAuthReply.prototype.buffer_size());
+            }
+        }
+
+        else if (this.state == "ticket")
+        {
+            this.auth_reply = new SpiceLinkAuthReply(mb);
+            if (this.auth_reply.auth_code == Constants.SPICE_LINK_ERR_OK)
+            {
+                DEBUG > 0 && console.log(this.type + ': Connected');
+
+                if (this.type == Constants.SPICE_CHANNEL_DISPLAY)
+                {
+                    // FIXME - pixmap and glz dictionary config info?
+                    var dinit = new SpiceMsgcDisplayInit();
+                    var reply = new SpiceMiniData();
+                    reply.build_msg(Constants.SPICE_MSGC_DISPLAY_INIT, dinit);
+                    DEBUG > 0 && console.log("Request display init");
+                    this.send_msg(reply);
+                }
+                this.state = "ready";
+                this.wire_reader.request(SpiceMiniData.prototype.buffer_size());
+                if (this.timeout)
+                {
+                    window.clearTimeout(this.timeout);
+                    delete this.timeout;
+                }
+            }
+            else
+            {
+                this.state = "error";
+                if (this.auth_reply.auth_code == Constants.SPICE_LINK_ERR_PERMISSION_DENIED)
+                {
+                    var e = new Error("Permission denied.");
+                }
+                else
+                {
+                    var e = new Error("Unexpected link error " + this.auth_reply.auth_code);
+                }
+                this.report_error(e);
+            }
+        }
+    },
+
+    process_common_messages : function(msg)
+    {
+        if (msg.type == Constants.SPICE_MSG_SET_ACK)
+        {
+            var ack = new SpiceMsgSetAck(msg.data);
+            // FIXME - what to do with generation?
+            this.ack_window = ack.window;
+            DEBUG > 1 && console.log(this.type + ": set ack to " + ack.window);
+            this.msgs_until_ack = this.ack_window;
+            var ackack = new SpiceMsgcAckSync(ack);
+            var reply = new SpiceMiniData();
+            reply.build_msg(Constants.SPICE_MSGC_ACK_SYNC, ackack);
+            this.send_msg(reply);
+            return true;
+        }
+
+        if (msg.type == Constants.SPICE_MSG_PING)
+        {
+            DEBUG > 1 && console.log("ping!");
+            var pong = new SpiceMiniData;
+            pong.type = Constants.SPICE_MSGC_PONG;
+            if (msg.data)
+            {
+                pong.data = msg.data.slice(0, 12);
+            }
+            pong.size = pong.buffer_size();
+            this.send_msg(pong);
+            return true;
+        }
+
+        if (msg.type == Constants.SPICE_MSG_NOTIFY)
+        {
+            // FIXME - Visibility + what
+            var notify = new SpiceMsgNotify(msg.data);
+            if (notify.severity == Constants.SPICE_NOTIFY_SEVERITY_ERROR)
+                this.log_err(notify.message);
+            else if (notify.severity == Constants.SPICE_NOTIFY_SEVERITY_WARN )
+                this.log_warn(notify.message);
+            else
+                this.log_info(notify.message);
+            return true;
+        }
+
+        return false;
+
+    },
+
+    process_message: function(msg)
+    {
+        var rc;
+        var start = Date.now();
+        DEBUG > 0 && console.log("<< hdr " + this.channel_type() + " type " + msg.type + " size " + (msg.data && msg.data.byteLength));
+        /* A handler that throws must not take the channel with it: the
+           caller re-arms the wire reader only after this returns, so an
+           escaped exception left every later byte read as a header and
+           the channel decoding garbage until it closed. Report it and
+           carry on with the next message. */
+        try
+        {
+            rc = this.process_common_messages(msg);
+            if (! rc)
+            {
+                if (this.process_channel_message)
+                {
+                    rc = this.process_channel_message(msg);
+                    if (! rc)
+                        this.log_warn(this.channel_type() + ": Unknown message type " + msg.type + "!");
+                }
+                else
+                    this.log_err(this.channel_type() + ": No message handlers for this channel; message " + msg.type);
+            }
+        }
+        catch (e)
+        {
+            this.log_err(this.channel_type() + ": exception handling message type " + msg.type + ": " + e.message);
+            DEBUG > 0 && console.error(e);
+        }
+
+        if (this.msgs_until_ack !== undefined && this.ack_window)
+        {
+            this.msgs_until_ack--;
+            if (this.msgs_until_ack <= 0)
+            {
+                this.msgs_until_ack = this.ack_window;
+                var ack = new SpiceMiniData();
+                ack.type = Constants.SPICE_MSGC_ACK;
+                this.send_msg(ack);
+                DEBUG > 1 && console.log(this.type + ": sent ack");
+            }
+        }
+
+        var delta = Date.now() - start;
+        if (DEBUG > 0 || delta > Webm.Constants.GAP_DETECTION_THRESHOLD)
+            console.log("delta " + this.channel_type() + ":" + msg.type + " " + delta);
+        return rc;
+    },
+
+    channel_type: function()
+    {
+        if (this.type == Constants.SPICE_CHANNEL_MAIN)
+            return "main";
+        else if (this.type == Constants.SPICE_CHANNEL_DISPLAY)
+            return "display";
+        else if (this.type == Constants.SPICE_CHANNEL_INPUTS)
+            return "inputs";
+        else if (this.type == Constants.SPICE_CHANNEL_CURSOR)
+            return "cursor";
+        else if (this.type == Constants.SPICE_CHANNEL_PLAYBACK)
+            return "playback";
+        else if (this.type == Constants.SPICE_CHANNEL_RECORD)
+            return "record";
+        else if (this.type == Constants.SPICE_CHANNEL_TUNNEL)
+            return "tunnel";
+        else if (this.type == Constants.SPICE_CHANNEL_SMARTCARD)
+            return "smartcard";
+        else if (this.type == Constants.SPICE_CHANNEL_USBREDIR)
+            return "usbredir";
+        else if (this.type == Constants.SPICE_CHANNEL_PORT)
+            return "port";
+        else if (this.type == Constants.SPICE_CHANNEL_WEBDAV)
+            return "webdav";
+        return "unknown-" + this.type;
+
+    },
+
+    log_info: function()
+    {
+        var msg = Array.prototype.join.call(arguments, " ");
+        console.log(msg);
+        if (this.message_id)
+        {
+            var p = document.createElement("p");
+            p.appendChild(document.createTextNode(msg));
+            p.className += "spice-message-info";
+            document.getElementById(this.message_id).appendChild(p);
+        }
+    },
+
+    log_warn: function()
+    {
+        var msg = Array.prototype.join.call(arguments, " ");
+        console.log("WARNING: " + msg);
+        if (this.message_id)
+        {
+            var p = document.createElement("p");
+            p.appendChild(document.createTextNode(msg));
+            p.className += "spice-message-warning";
+            document.getElementById(this.message_id).appendChild(p);
+        }
+    },
+
+    log_err: function()
+    {
+        var msg = Array.prototype.join.call(arguments, " ");
+        console.log("ERROR: " + msg);
+        if (this.message_id)
+        {
+            var p = document.createElement("p");
+            p.appendChild(document.createTextNode(msg));
+            p.className += "spice-message-error";
+            document.getElementById(this.message_id).appendChild(p);
+        }
+    },
+
+    known_unimplemented: function(type, msg)
+    {
+        if ( (!this.warnings[type]) || DEBUG > 1)
+        {
+            var str = "";
+            if (DEBUG <= 1)
+                str = " [ further notices suppressed ]";
+            this.log_warn("Unimplemented function " + type + "(" + msg + ")" + str);
+            this.warnings[type] = true;
+        }
+    },
+
+    report_error: function(e)
+    {
+        this.log_err(e.toString());
+        if (this.onerror != undefined)
+            this.onerror(e);
+        else
+            throw(e);
+    },
+
+    report_success: function(m)
+    {
+        if (this.onsuccess != undefined)
+            this.onsuccess(m);
+    },
+
+    cleanup: function()
+    {
+        /* Deliberate teardown: without this the ws close event arrives
+           with a live state and reports "Unexpected close" through
+           onerror. */
+        this.state = "closing";
+        if (this.timeout)
+        {
+            window.clearTimeout(this.timeout);
+            delete this.timeout;
+        }
+        if (this.ws)
+        {
+            this.ws.close();
+            this.ws = undefined;
+        }
+    },
+
+    handle_timeout: function()
+    {
+        var e = new Error("Connection timed out.");
+        /* Actually shut the connection down.  Reporting alone left the
+           socket open, and a slow handshake could still complete after
+           the application had already given up on it — a zombie session
+           with its own inputs and display channels.  Cleanup before
+           report so the socket dies even if report_error throws; the
+           error state also keeps the close event from double-reporting. */
+        this.cleanup();
+        this.state = "error";
+        this.report_error(e);
+    },
+}
+
+function spiceconn_timeout(sc)
+{
+    SpiceConn.prototype.handle_timeout.call(sc);
+}
+
+export {
+  SpiceConn,
+};
@@ -0,0 +1,497 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*----------------------------------------------------------------------------
+**  Spice types
+**      This file contains classes for common spice types.
+**  Generally, they are used as helpers in reading and writing messages
+**  to and from the server.
+**--------------------------------------------------------------------------*/
+
+import { Constants } from './enums.js';
+import { SpiceQuic } from './quic.js';
+
+function SpiceChannelId()
+{
+}
+SpiceChannelId.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.type = dv.getUint8(at, true); at ++;
+        this.id = dv.getUint8(at, true); at ++;
+        return at;
+    },
+}
+
+function SpiceRect()
+{
+}
+
+SpiceRect.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.top = dv.getUint32(at, true); at += 4;
+        this.left = dv.getUint32(at, true); at += 4;
+        this.bottom = dv.getUint32(at, true); at += 4;
+        this.right = dv.getUint32(at, true); at += 4;
+        return at;
+    },
+    is_same_size : function(r)
+    {
+        if ((this.bottom - this.top) == (r.bottom - r.top) &&
+            (this.right - this.left) == (r.right - r.left) )
+            return true;
+
+        return false;
+    },
+}
+
+function SpiceClipRects()
+{
+}
+
+SpiceClipRects.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        var i;
+        this.num_rects = dv.getUint32(at, true); at += 4;
+        if (this.num_rects > 0)
+            this.rects = [];
+        for (i = 0; i < this.num_rects; i++)
+        {
+            this.rects[i] = new SpiceRect();
+            at = this.rects[i].from_dv(dv, at, mb);
+        }
+        return at;
+    },
+}
+
+function SpiceClip()
+{
+}
+
+SpiceClip.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.type = dv.getUint8(at, true); at ++;
+        if (this.type == Constants.SPICE_CLIP_TYPE_RECTS)
+        {
+            this.rects = new SpiceClipRects();
+            at = this.rects.from_dv(dv, at, mb);
+        }
+        return at;
+    },
+}
+
+function SpiceImageDescriptor()
+{
+}
+
+SpiceImageDescriptor.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.id = dv.getBigUint64(at, true); at += 8;
+        this.type  = dv.getUint8(at, true); at ++;
+        this.flags = dv.getUint8(at, true); at ++;
+        this.width = dv.getUint32(at, true); at += 4;
+        this.height= dv.getUint32(at, true); at += 4;
+        return at;
+    },
+}
+
+function SpicePalette()
+{
+}
+
+SpicePalette.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        var i;
+        this.unique = dv.getBigUint64(at, true); at += 8;
+        this.num_ents = dv.getUint16(at, true); at += 2;
+        this.ents = [];
+        for (i = 0; i < this.num_ents; i++)
+        {
+            this.ents[i] = dv.getUint32(at, true); at += 4;
+        }
+        return at;
+    },
+}
+
+function SpiceBitmap()
+{
+}
+
+SpiceBitmap.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.format = dv.getUint8(at, true); at++;
+        this.flags  = dv.getUint8(at, true); at++;
+        this.x = dv.getUint32(at, true); at += 4;
+        this.y = dv.getUint32(at, true); at += 4;
+        this.stride = dv.getUint32(at, true); at += 4;
+        if (this.flags & Constants.SPICE_BITMAP_FLAGS_PAL_FROM_CACHE)
+        {
+            this.palette_id = dv.getBigUint64(at, true); at += 8;
+        }
+        else
+        {
+            var offset = dv.getUint32(at, true); at += 4;
+            if (offset == 0)
+                this.palette = null;
+            else
+            {
+                this.palette = new SpicePalette;
+                this.palette.from_dv(dv, offset, mb);
+            }
+        }
+        // FIXME - should probably constrain this to the offset
+        //          of palette, if non zero
+        this.data   = mb.slice(at);
+        at += this.data.byteLength;
+        return at;
+    },
+}
+
+function SpiceImage()
+{
+}
+
+SpiceImage.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.descriptor = new SpiceImageDescriptor;
+        at = this.descriptor.from_dv(dv, at, mb);
+
+        if (this.descriptor.type == Constants.SPICE_IMAGE_TYPE_LZ_RGB)
+        {
+            this.lz_rgb = new Object();
+            this.lz_rgb.length = dv.getUint32(at, true); at += 4;
+            var initial_at = at;
+            this.lz_rgb.magic = "";
+            for (var i = 3; i >= 0; i--)
+                this.lz_rgb.magic += String.fromCharCode(dv.getUint8(at + i));
+            at += 4;
+
+            // NOTE:  The endian change is *correct*
+            this.lz_rgb.version = dv.getUint32(at); at += 4;
+            this.lz_rgb.type = dv.getUint32(at); at += 4;
+            this.lz_rgb.width = dv.getUint32(at); at += 4;
+            this.lz_rgb.height = dv.getUint32(at); at += 4;
+            this.lz_rgb.stride = dv.getUint32(at); at += 4;
+            this.lz_rgb.top_down = dv.getUint32(at); at += 4;
+
+            var header_size = at - initial_at;
+
+            this.lz_rgb.data   = mb.slice(at, this.lz_rgb.length + at - header_size);
+            at += this.lz_rgb.data.byteLength;
+
+        }
+
+        if (this.descriptor.type == Constants.SPICE_IMAGE_TYPE_BITMAP)
+        {
+            this.bitmap = new SpiceBitmap;
+            at = this.bitmap.from_dv(dv, at, mb);
+        }
+
+        if (this.descriptor.type == Constants.SPICE_IMAGE_TYPE_SURFACE)
+        {
+            this.surface_id = dv.getUint32(at, true); at += 4;
+        }
+
+        if (this.descriptor.type == Constants.SPICE_IMAGE_TYPE_JPEG)
+        {
+            this.jpeg = new Object;
+            this.jpeg.data_size = dv.getUint32(at, true); at += 4;
+            this.jpeg.data = mb.slice(at);
+            at += this.jpeg.data.byteLength;
+        }
+
+        if (this.descriptor.type == Constants.SPICE_IMAGE_TYPE_JPEG_ALPHA)
+        {
+            this.jpeg_alpha = new Object;
+            this.jpeg_alpha.flags = dv.getUint8(at, true); at += 1;
+            this.jpeg_alpha.jpeg_size = dv.getUint32(at, true); at += 4;
+            this.jpeg_alpha.data_size = dv.getUint32(at, true); at += 4;
+            this.jpeg_alpha.data = mb.slice(at, this.jpeg_alpha.jpeg_size + at);
+            at += this.jpeg_alpha.data.byteLength;
+            // Alpha channel is an LZ image
+            this.jpeg_alpha.alpha = new Object();
+            this.jpeg_alpha.alpha.length = this.jpeg_alpha.data_size - this.jpeg_alpha.jpeg_size;
+            var initial_at = at;
+            this.jpeg_alpha.alpha.magic = "";
+            for (var i = 3; i >= 0; i--)
+                this.jpeg_alpha.alpha.magic += String.fromCharCode(dv.getUint8(at + i));
+            at += 4;
+
+            // NOTE:  The endian change is *correct*
+            this.jpeg_alpha.alpha.version = dv.getUint32(at); at += 4;
+            this.jpeg_alpha.alpha.type = dv.getUint32(at); at += 4;
+            this.jpeg_alpha.alpha.width = dv.getUint32(at); at += 4;
+            this.jpeg_alpha.alpha.height = dv.getUint32(at); at += 4;
+            this.jpeg_alpha.alpha.stride = dv.getUint32(at); at += 4;
+            this.jpeg_alpha.alpha.top_down = dv.getUint32(at); at += 4;
+
+            var header_size = at - initial_at;
+
+            this.jpeg_alpha.alpha.data   = mb.slice(at, this.jpeg_alpha.alpha.length + at - header_size);
+            at += this.jpeg_alpha.alpha.data.byteLength;
+        }
+
+        if (this.descriptor.type == Constants.SPICE_IMAGE_TYPE_QUIC)
+        {
+            this.quic = new SpiceQuic;
+            at = this.quic.from_dv(dv, at, mb);
+        }
+        return at;
+    },
+}
+
+
+function SpiceQMask()
+{
+}
+
+SpiceQMask.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.flags  = dv.getUint8(at, true); at++;
+        this.pos = new SpicePoint;
+        at = this.pos.from_dv(dv, at, mb);
+        var offset = dv.getUint32(at, true); at += 4;
+        if (offset == 0)
+        {
+            this.bitmap = null;
+            return at;
+        }
+
+        this.bitmap = new SpiceImage;
+        return this.bitmap.from_dv(dv, offset, mb);
+    },
+}
+
+
+function SpicePattern()
+{
+}
+
+SpicePattern.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        var offset = dv.getUint32(at, true); at += 4;
+        if (offset == 0)
+        {
+            this.pat = null;
+        }
+        else
+        {
+            this.pat = new SpiceImage;
+            this.pat.from_dv(dv, offset, mb);
+        }
+
+        this.pos = new SpicePoint;
+        return this.pos.from_dv(dv, at, mb);
+    }
+}
+
+function SpiceBrush()
+{
+}
+
+SpiceBrush.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.type = dv.getUint8(at, true); at ++;
+        if (this.type == Constants.SPICE_BRUSH_TYPE_SOLID)
+        {
+            this.color = dv.getUint32(at, true); at += 4;
+        }
+        else if (this.type == Constants.SPICE_BRUSH_TYPE_PATTERN)
+        {
+            this.pattern = new SpicePattern;
+            at = this.pattern.from_dv(dv, at, mb);
+        }
+        return at;
+    },
+}
+
+function SpiceFill()
+{
+}
+
+SpiceFill.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.brush = new SpiceBrush;
+        at = this.brush.from_dv(dv, at, mb);
+        this.rop_descriptor = dv.getUint16(at, true); at += 2;
+        this.mask = new SpiceQMask;
+        return this.mask.from_dv(dv, at, mb);
+    },
+}
+
+
+function SpiceCopy()
+{
+}
+
+SpiceCopy.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        var offset = dv.getUint32(at, true); at += 4;
+        if (offset == 0)
+        {
+            this.src_bitmap = null;
+        }
+        else
+        {
+            this.src_bitmap = new SpiceImage;
+            this.src_bitmap.from_dv(dv, offset, mb);
+        }
+        this.src_area = new SpiceRect;
+        at = this.src_area.from_dv(dv, at, mb);
+        this.rop_descriptor = dv.getUint16(at, true); at += 2;
+        this.scale_mode = dv.getUint8(at, true); at ++;
+        this.mask = new SpiceQMask;
+        return this.mask.from_dv(dv, at, mb);
+    },
+}
+
+function SpicePoint16()
+{
+}
+
+SpicePoint16.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.x = dv.getUint16(at, true); at += 2;
+        this.y = dv.getUint16(at, true); at += 2;
+        return at;
+    },
+}
+
+function SpicePoint()
+{
+}
+
+SpicePoint.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.x = dv.getUint32(at, true); at += 4;
+        this.y = dv.getUint32(at, true); at += 4;
+        return at;
+    },
+}
+
+function SpiceCursorHeader()
+{
+}
+
+SpiceCursorHeader.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.unique = dv.getBigUint64(at, true); at += 8;
+        this.type = dv.getUint8(at, true); at ++;
+        this.width = dv.getUint16(at, true); at += 2;
+        this.height = dv.getUint16(at, true); at += 2;
+        this.hot_spot_x = dv.getUint16(at, true); at += 2;
+        this.hot_spot_y = dv.getUint16(at, true); at += 2;
+        return at;
+    },
+}
+
+function SpiceCursor()
+{
+}
+
+SpiceCursor.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.flags = dv.getUint16(at, true); at += 2;
+        if (this.flags & Constants.SPICE_CURSOR_FLAGS_NONE)
+            this.header = null;
+        else
+        {
+            this.header = new SpiceCursorHeader;
+            at = this.header.from_dv(dv, at, mb);
+            this.data   = mb.slice(at);
+            at += this.data.byteLength;
+        }
+        return at;
+    },
+}
+
+function SpiceSurface()
+{
+}
+
+SpiceSurface.prototype =
+{
+    from_dv: function(dv, at, mb)
+    {
+        this.surface_id = dv.getUint32(at, true); at += 4;
+        this.width = dv.getUint32(at, true); at += 4;
+        this.height = dv.getUint32(at, true); at += 4;
+        this.format = dv.getUint32(at, true); at += 4;
+        this.flags = dv.getUint32(at, true); at += 4;
+        return at;
+    },
+}
+
+/* FIXME - SpiceImage  types lz_plt, jpeg, zlib_glz, and jpeg_alpha are
+           completely unimplemented */
+
+export {
+  SpiceChannelId,
+  SpiceRect,
+  SpiceClipRects,
+  SpiceClip,
+  SpiceImageDescriptor,
+  SpicePalette,
+  SpiceBitmap,
+  SpiceImage,
+  SpiceQMask,
+  SpicePattern,
+  SpiceBrush,
+  SpiceFill,
+  SpiceCopy,
+  SpicePoint16,
+  SpicePoint,
+  SpiceCursorHeader,
+  SpiceCursor,
+  SpiceSurface,
+};
@@ -0,0 +1,593 @@
+// Downloaded from http://www-cs-students.stanford.edu/~tjw/jsbn/ by Jeremy White on 6/1/2012
+
+/*
+ * Copyright (c) 2003-2005  Tom Wu
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
+ * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * In addition, the following condition applies:
+ *
+ * All redistributions must retain an intact copy of this copyright notice
+ * and disclaimer.
+ */
+
+
+// Basic JavaScript BN library - subset useful for RSA encryption.
+
+// Bits per digit
+var dbits;
+
+// JavaScript engine analysis
+var canary = 0xdeadbeefcafe;
+var j_lm = ((canary&0xffffff)==0xefcafe);
+
+// (public) Constructor
+function BigInteger(a,b,c) {
+  if(a != null)
+    if("number" == typeof a) this.fromNumber(a,b,c);
+    else if(b == null && "string" != typeof a) this.fromString(a,256);
+    else this.fromString(a,b);
+}
+
+// return new, unset BigInteger
+function nbi() { return new BigInteger(null); }
+
+// am: Compute w_j += (x*this_i), propagate carries,
+// c is initial carry, returns final carry.
+// c < 3*dvalue, x < 2*dvalue, this_i < dvalue
+// We need to select the fastest one that works in this environment.
+
+// am1: use a single mult and divide to get the high bits,
+// max digit bits should be 26 because
+// max internal value = 2*dvalue^2-2*dvalue (< 2^53)
+function am1(i,x,w,j,c,n) {
+  while(--n >= 0) {
+    var v = x*this[i++]+w[j]+c;
+    c = Math.floor(v/0x4000000);
+    w[j++] = v&0x3ffffff;
+  }
+  return c;
+}
+// am2 avoids a big mult-and-extract completely.
+// Max digit bits should be <= 30 because we do bitwise ops
+// on values up to 2*hdvalue^2-hdvalue-1 (< 2^31)
+function am2(i,x,w,j,c,n) {
+  var xl = x&0x7fff, xh = x>>15;
+  while(--n >= 0) {
+    var l = this[i]&0x7fff;
+    var h = this[i++]>>15;
+    var m = xh*l+h*xl;
+    l = xl*l+((m&0x7fff)<<15)+w[j]+(c&0x3fffffff);
+    c = (l>>>30)+(m>>>15)+xh*h+(c>>>30);
+    w[j++] = l&0x3fffffff;
+  }
+  return c;
+}
+// Alternately, set max digit bits to 28 since some
+// browsers slow down when dealing with 32-bit numbers.
+function am3(i,x,w,j,c,n) {
+  var xl = x&0x3fff, xh = x>>14;
+  while(--n >= 0) {
+    var l = this[i]&0x3fff;
+    var h = this[i++]>>14;
+    var m = xh*l+h*xl;
+    l = xl*l+((m&0x3fff)<<14)+w[j]+c;
+    c = (l>>28)+(m>>14)+xh*h;
+    w[j++] = l&0xfffffff;
+  }
+  return c;
+}
+if(j_lm && (navigator.appName == "Microsoft Internet Explorer")) {
+  BigInteger.prototype.am = am2;
+  dbits = 30;
+}
+else if(j_lm && (navigator.appName != "Netscape")) {
+  BigInteger.prototype.am = am1;
+  dbits = 26;
+}
+else { // Mozilla/Netscape seems to prefer am3
+  BigInteger.prototype.am = am3;
+  dbits = 28;
+}
+
+BigInteger.prototype.DB = dbits;
+BigInteger.prototype.DM = ((1<<dbits)-1);
+BigInteger.prototype.DV = (1<<dbits);
+
+var BI_FP = 52;
+BigInteger.prototype.FV = Math.pow(2,BI_FP);
+BigInteger.prototype.F1 = BI_FP-dbits;
+BigInteger.prototype.F2 = 2*dbits-BI_FP;
+
+// Digit conversions
+var BI_RM = "0123456789abcdefghijklmnopqrstuvwxyz";
+var BI_RC = new Array();
+var rr,vv;
+rr = "0".charCodeAt(0);
+for(vv = 0; vv <= 9; ++vv) BI_RC[rr++] = vv;
+rr = "a".charCodeAt(0);
+for(vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv;
+rr = "A".charCodeAt(0);
+for(vv = 10; vv < 36; ++vv) BI_RC[rr++] = vv;
+
+function int2char(n) { return BI_RM.charAt(n); }
+function intAt(s,i) {
+  var c = BI_RC[s.charCodeAt(i)];
+  return (c==null)?-1:c;
+}
+
+// (protected) copy this to r
+function bnpCopyTo(r) {
+  for(var i = this.t-1; i >= 0; --i) r[i] = this[i];
+  r.t = this.t;
+  r.s = this.s;
+}
+
+// (protected) set from integer value x, -DV <= x < DV
+function bnpFromInt(x) {
+  this.t = 1;
+  this.s = (x<0)?-1:0;
+  if(x > 0) this[0] = x;
+  else if(x < -1) this[0] = x+DV;
+  else this.t = 0;
+}
+
+// return bigint initialized to value
+function nbv(i) { var r = nbi(); r.fromInt(i); return r; }
+
+// (protected) set from string and radix
+function bnpFromString(s,b) {
+  var k;
+  if(b == 16) k = 4;
+  else if(b == 8) k = 3;
+  else if(b == 256) k = 8; // byte array
+  else if(b == 2) k = 1;
+  else if(b == 32) k = 5;
+  else if(b == 4) k = 2;
+  else { this.fromRadix(s,b); return; }
+  this.t = 0;
+  this.s = 0;
+  var i = s.length, mi = false, sh = 0;
+  while(--i >= 0) {
+    var x = (k==8)?s[i]&0xff:intAt(s,i);
+    if(x < 0) {
+      if(s.charAt(i) == "-") mi = true;
+      continue;
+    }
+    mi = false;
+    if(sh == 0)
+      this[this.t++] = x;
+    else if(sh+k > this.DB) {
+      this[this.t-1] |= (x&((1<<(this.DB-sh))-1))<<sh;
+      this[this.t++] = (x>>(this.DB-sh));
+    }
+    else
+      this[this.t-1] |= x<<sh;
+    sh += k;
+    if(sh >= this.DB) sh -= this.DB;
+  }
+  if(k == 8 && (s[0]&0x80) != 0) {
+    this.s = -1;
+    if(sh > 0) this[this.t-1] |= ((1<<(this.DB-sh))-1)<<sh;
+  }
+  this.clamp();
+  if(mi) BigInteger.ZERO.subTo(this,this);
+}
+
+// (protected) clamp off excess high words
+function bnpClamp() {
+  var c = this.s&this.DM;
+  while(this.t > 0 && this[this.t-1] == c) --this.t;
+}
+
+// (public) return string representation in given radix
+function bnToString(b) {
+  if(this.s < 0) return "-"+this.negate().toString(b);
+  var k;
+  if(b == 16) k = 4;
+  else if(b == 8) k = 3;
+  else if(b == 2) k = 1;
+  else if(b == 32) k = 5;
+  else if(b == 4) k = 2;
+  else return this.toRadix(b);
+  var km = (1<<k)-1, d, m = false, r = "", i = this.t;
+  var p = this.DB-(i*this.DB)%k;
+  if(i-- > 0) {
+    if(p < this.DB && (d = this[i]>>p) > 0) { m = true; r = int2char(d); }
+    while(i >= 0) {
+      if(p < k) {
+        d = (this[i]&((1<<p)-1))<<(k-p);
+        d |= this[--i]>>(p+=this.DB-k);
+      }
+      else {
+        d = (this[i]>>(p-=k))&km;
+        if(p <= 0) { p += this.DB; --i; }
+      }
+      if(d > 0) m = true;
+      if(m) r += int2char(d);
+    }
+  }
+  return m?r:"0";
+}
+
+// (public) -this
+function bnNegate() { var r = nbi(); BigInteger.ZERO.subTo(this,r); return r; }
+
+// (public) |this|
+function bnAbs() { return (this.s<0)?this.negate():this; }
+
+// (public) return + if this > a, - if this < a, 0 if equal
+function bnCompareTo(a) {
+  var r = this.s-a.s;
+  if(r != 0) return r;
+  var i = this.t;
+  r = i-a.t;
+  if(r != 0) return r;
+  while(--i >= 0) if((r=this[i]-a[i]) != 0) return r;
+  return 0;
+}
+
+// returns bit length of the integer x
+function nbits(x) {
+  var r = 1, t;
+  if((t=x>>>16) != 0) { x = t; r += 16; }
+  if((t=x>>8) != 0) { x = t; r += 8; }
+  if((t=x>>4) != 0) { x = t; r += 4; }
+  if((t=x>>2) != 0) { x = t; r += 2; }
+  if((t=x>>1) != 0) { x = t; r += 1; }
+  return r;
+}
+
+// (public) return the number of bits in "this"
+function bnBitLength() {
+  if(this.t <= 0) return 0;
+  return this.DB*(this.t-1)+nbits(this[this.t-1]^(this.s&this.DM));
+}
+
+// (protected) r = this << n*DB
+function bnpDLShiftTo(n,r) {
+  var i;
+  for(i = this.t-1; i >= 0; --i) r[i+n] = this[i];
+  for(i = n-1; i >= 0; --i) r[i] = 0;
+  r.t = this.t+n;
+  r.s = this.s;
+}
+
+// (protected) r = this >> n*DB
+function bnpDRShiftTo(n,r) {
+  for(var i = n; i < this.t; ++i) r[i-n] = this[i];
+  r.t = Math.max(this.t-n,0);
+  r.s = this.s;
+}
+
+// (protected) r = this << n
+function bnpLShiftTo(n,r) {
+  var bs = n%this.DB;
+  var cbs = this.DB-bs;
+  var bm = (1<<cbs)-1;
+  var ds = Math.floor(n/this.DB), c = (this.s<<bs)&this.DM, i;
+  for(i = this.t-1; i >= 0; --i) {
+    r[i+ds+1] = (this[i]>>cbs)|c;
+    c = (this[i]&bm)<<bs;
+  }
+  for(i = ds-1; i >= 0; --i) r[i] = 0;
+  r[ds] = c;
+  r.t = this.t+ds+1;
+  r.s = this.s;
+  r.clamp();
+}
+
+// (protected) r = this >> n
+function bnpRShiftTo(n,r) {
+  r.s = this.s;
+  var ds = Math.floor(n/this.DB);
+  if(ds >= this.t) { r.t = 0; return; }
+  var bs = n%this.DB;
+  var cbs = this.DB-bs;
+  var bm = (1<<bs)-1;
+  r[0] = this[ds]>>bs;
+  for(var i = ds+1; i < this.t; ++i) {
+    r[i-ds-1] |= (this[i]&bm)<<cbs;
+    r[i-ds] = this[i]>>bs;
+  }
+  if(bs > 0) r[this.t-ds-1] |= (this.s&bm)<<cbs;
+  r.t = this.t-ds;
+  r.clamp();
+}
+
+// (protected) r = this - a
+function bnpSubTo(a,r) {
+  var i = 0, c = 0, m = Math.min(a.t,this.t);
+  while(i < m) {
+    c += this[i]-a[i];
+    r[i++] = c&this.DM;
+    c >>= this.DB;
+  }
+  if(a.t < this.t) {
+    c -= a.s;
+    while(i < this.t) {
+      c += this[i];
+      r[i++] = c&this.DM;
+      c >>= this.DB;
+    }
+    c += this.s;
+  }
+  else {
+    c += this.s;
+    while(i < a.t) {
+      c -= a[i];
+      r[i++] = c&this.DM;
+      c >>= this.DB;
+    }
+    c -= a.s;
+  }
+  r.s = (c<0)?-1:0;
+  if(c < -1) r[i++] = this.DV+c;
+  else if(c > 0) r[i++] = c;
+  r.t = i;
+  r.clamp();
+}
+
+// (protected) r = this * a, r != this,a (HAC 14.12)
+// "this" should be the larger one if appropriate.
+function bnpMultiplyTo(a,r) {
+  var x = this.abs(), y = a.abs();
+  var i = x.t;
+  r.t = i+y.t;
+  while(--i >= 0) r[i] = 0;
+  for(i = 0; i < y.t; ++i) r[i+x.t] = x.am(0,y[i],r,i,0,x.t);
+  r.s = 0;
+  r.clamp();
+  if(this.s != a.s) BigInteger.ZERO.subTo(r,r);
+}
+
+// (protected) r = this^2, r != this (HAC 14.16)
+function bnpSquareTo(r) {
+  var x = this.abs();
+  var i = r.t = 2*x.t;
+  while(--i >= 0) r[i] = 0;
+  for(i = 0; i < x.t-1; ++i) {
+    var c = x.am(i,x[i],r,2*i,0,1);
+    if((r[i+x.t]+=x.am(i+1,2*x[i],r,2*i+1,c,x.t-i-1)) >= x.DV) {
+      r[i+x.t] -= x.DV;
+      r[i+x.t+1] = 1;
+    }
+  }
+  if(r.t > 0) r[r.t-1] += x.am(i,x[i],r,2*i,0,1);
+  r.s = 0;
+  r.clamp();
+}
+
+// (protected) divide this by m, quotient and remainder to q, r (HAC 14.20)
+// r != q, this != m.  q or r may be null.
+function bnpDivRemTo(m,q,r) {
+  var pm = m.abs();
+  if(pm.t <= 0) return;
+  var pt = this.abs();
+  if(pt.t < pm.t) {
+    if(q != null) q.fromInt(0);
+    if(r != null) this.copyTo(r);
+    return;
+  }
+  if(r == null) r = nbi();
+  var y = nbi(), ts = this.s, ms = m.s;
+  var nsh = this.DB-nbits(pm[pm.t-1]);	// normalize modulus
+  if(nsh > 0) { pm.lShiftTo(nsh,y); pt.lShiftTo(nsh,r); }
+  else { pm.copyTo(y); pt.copyTo(r); }
+  var ys = y.t;
+  var y0 = y[ys-1];
+  if(y0 == 0) return;
+  var yt = y0*(1<<this.F1)+((ys>1)?y[ys-2]>>this.F2:0);
+  var d1 = this.FV/yt, d2 = (1<<this.F1)/yt, e = 1<<this.F2;
+  var i = r.t, j = i-ys, t = (q==null)?nbi():q;
+  y.dlShiftTo(j,t);
+  if(r.compareTo(t) >= 0) {
+    r[r.t++] = 1;
+    r.subTo(t,r);
+  }
+  BigInteger.ONE.dlShiftTo(ys,t);
+  t.subTo(y,y);	// "negative" y so we can replace sub with am later
+  while(y.t < ys) y[y.t++] = 0;
+  while(--j >= 0) {
+    // Estimate quotient digit
+    var qd = (r[--i]==y0)?this.DM:Math.floor(r[i]*d1+(r[i-1]+e)*d2);
+    if((r[i]+=y.am(0,qd,r,j,0,ys)) < qd) {	// Try it out
+      y.dlShiftTo(j,t);
+      r.subTo(t,r);
+      while(r[i] < --qd) r.subTo(t,r);
+    }
+  }
+  if(q != null) {
+    r.drShiftTo(ys,q);
+    if(ts != ms) BigInteger.ZERO.subTo(q,q);
+  }
+  r.t = ys;
+  r.clamp();
+  if(nsh > 0) r.rShiftTo(nsh,r);	// Denormalize remainder
+  if(ts < 0) BigInteger.ZERO.subTo(r,r);
+}
+
+// (public) this mod a
+function bnMod(a) {
+  var r = nbi();
+  this.abs().divRemTo(a,null,r);
+  if(this.s < 0 && r.compareTo(BigInteger.ZERO) > 0) a.subTo(r,r);
+  return r;
+}
+
+// Modular reduction using "classic" algorithm
+function Classic(m) { this.m = m; }
+function cConvert(x) {
+  if(x.s < 0 || x.compareTo(this.m) >= 0) return x.mod(this.m);
+  else return x;
+}
+function cRevert(x) { return x; }
+function cReduce(x) { x.divRemTo(this.m,null,x); }
+function cMulTo(x,y,r) { x.multiplyTo(y,r); this.reduce(r); }
+function cSqrTo(x,r) { x.squareTo(r); this.reduce(r); }
+
+Classic.prototype.convert = cConvert;
+Classic.prototype.revert = cRevert;
+Classic.prototype.reduce = cReduce;
+Classic.prototype.mulTo = cMulTo;
+Classic.prototype.sqrTo = cSqrTo;
+
+// (protected) return "-1/this % 2^DB"; useful for Mont. reduction
+// justification:
+//         xy == 1 (mod m)
+//         xy =  1+km
+//   xy(2-xy) = (1+km)(1-km)
+// x[y(2-xy)] = 1-k^2m^2
+// x[y(2-xy)] == 1 (mod m^2)
+// if y is 1/x mod m, then y(2-xy) is 1/x mod m^2
+// should reduce x and y(2-xy) by m^2 at each step to keep size bounded.
+// JS multiply "overflows" differently from C/C++, so care is needed here.
+function bnpInvDigit() {
+  if(this.t < 1) return 0;
+  var x = this[0];
+  if((x&1) == 0) return 0;
+  var y = x&3;		// y == 1/x mod 2^2
+  y = (y*(2-(x&0xf)*y))&0xf;	// y == 1/x mod 2^4
+  y = (y*(2-(x&0xff)*y))&0xff;	// y == 1/x mod 2^8
+  y = (y*(2-(((x&0xffff)*y)&0xffff)))&0xffff;	// y == 1/x mod 2^16
+  // last step - calculate inverse mod DV directly;
+  // assumes 16 < DB <= 32 and assumes ability to handle 48-bit ints
+  y = (y*(2-x*y%this.DV))%this.DV;		// y == 1/x mod 2^dbits
+  // we really want the negative inverse, and -DV < y < DV
+  return (y>0)?this.DV-y:-y;
+}
+
+// Montgomery reduction
+function Montgomery(m) {
+  this.m = m;
+  this.mp = m.invDigit();
+  this.mpl = this.mp&0x7fff;
+  this.mph = this.mp>>15;
+  this.um = (1<<(m.DB-15))-1;
+  this.mt2 = 2*m.t;
+}
+
+// xR mod m
+function montConvert(x) {
+  var r = nbi();
+  x.abs().dlShiftTo(this.m.t,r);
+  r.divRemTo(this.m,null,r);
+  if(x.s < 0 && r.compareTo(BigInteger.ZERO) > 0) this.m.subTo(r,r);
+  return r;
+}
+
+// x/R mod m
+function montRevert(x) {
+  var r = nbi();
+  x.copyTo(r);
+  this.reduce(r);
+  return r;
+}
+
+// x = x/R mod m (HAC 14.32)
+function montReduce(x) {
+  while(x.t <= this.mt2)	// pad x so am has enough room later
+    x[x.t++] = 0;
+  for(var i = 0; i < this.m.t; ++i) {
+    // faster way of calculating u0 = x[i]*mp mod DV
+    var j = x[i]&0x7fff;
+    var u0 = (j*this.mpl+(((j*this.mph+(x[i]>>15)*this.mpl)&this.um)<<15))&x.DM;
+    // use am to combine the multiply-shift-add into one call
+    j = i+this.m.t;
+    x[j] += this.m.am(0,u0,x,i,0,this.m.t);
+    // propagate carry
+    while(x[j] >= x.DV) { x[j] -= x.DV; x[++j]++; }
+  }
+  x.clamp();
+  x.drShiftTo(this.m.t,x);
+  if(x.compareTo(this.m) >= 0) x.subTo(this.m,x);
+}
+
+// r = "x^2/R mod m"; x != r
+function montSqrTo(x,r) { x.squareTo(r); this.reduce(r); }
+
+// r = "xy/R mod m"; x,y != r
+function montMulTo(x,y,r) { x.multiplyTo(y,r); this.reduce(r); }
+
+Montgomery.prototype.convert = montConvert;
+Montgomery.prototype.revert = montRevert;
+Montgomery.prototype.reduce = montReduce;
+Montgomery.prototype.mulTo = montMulTo;
+Montgomery.prototype.sqrTo = montSqrTo;
+
+// (protected) true iff this is even
+function bnpIsEven() { return ((this.t>0)?(this[0]&1):this.s) == 0; }
+
+// (protected) this^e, e < 2^32, doing sqr and mul with "r" (HAC 14.79)
+function bnpExp(e,z) {
+  if(e > 0xffffffff || e < 1) return BigInteger.ONE;
+  var r = nbi(), r2 = nbi(), g = z.convert(this), i = nbits(e)-1;
+  g.copyTo(r);
+  while(--i >= 0) {
+    z.sqrTo(r,r2);
+    if((e&(1<<i)) > 0) z.mulTo(r2,g,r);
+    else { var t = r; r = r2; r2 = t; }
+  }
+  return z.revert(r);
+}
+
+// (public) this^e % m, 0 <= e < 2^32
+function bnModPowInt(e,m) {
+  var z;
+  if(e < 256 || m.isEven()) z = new Classic(m); else z = new Montgomery(m);
+  return this.exp(e,z);
+}
+
+// protected
+BigInteger.prototype.copyTo = bnpCopyTo;
+BigInteger.prototype.fromInt = bnpFromInt;
+BigInteger.prototype.fromString = bnpFromString;
+BigInteger.prototype.clamp = bnpClamp;
+BigInteger.prototype.dlShiftTo = bnpDLShiftTo;
+BigInteger.prototype.drShiftTo = bnpDRShiftTo;
+BigInteger.prototype.lShiftTo = bnpLShiftTo;
+BigInteger.prototype.rShiftTo = bnpRShiftTo;
+BigInteger.prototype.subTo = bnpSubTo;
+BigInteger.prototype.multiplyTo = bnpMultiplyTo;
+BigInteger.prototype.squareTo = bnpSquareTo;
+BigInteger.prototype.divRemTo = bnpDivRemTo;
+BigInteger.prototype.invDigit = bnpInvDigit;
+BigInteger.prototype.isEven = bnpIsEven;
+BigInteger.prototype.exp = bnpExp;
+
+// public
+BigInteger.prototype.toString = bnToString;
+BigInteger.prototype.negate = bnNegate;
+BigInteger.prototype.abs = bnAbs;
+BigInteger.prototype.compareTo = bnCompareTo;
+BigInteger.prototype.bitLength = bnBitLength;
+BigInteger.prototype.mod = bnMod;
+BigInteger.prototype.modPowInt = bnModPowInt;
+
+// "constants"
+BigInteger.ZERO = nbv(0);
+BigInteger.ONE = nbv(1);
+
+export {
+  BigInteger,
+};
@@ -0,0 +1,84 @@
+// Downloaded from http://www-cs-students.stanford.edu/~tjw/jsbn/ by Jeremy White on 6/1/2012
+
+/*
+ * Copyright (c) 2003-2005  Tom Wu
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
+ * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * In addition, the following condition applies:
+ *
+ * All redistributions must retain an intact copy of this copyright notice
+ * and disclaimer.
+ */
+
+
+// prng4.js - uses Arcfour as a PRNG
+
+function Arcfour() {
+  this.i = 0;
+  this.j = 0;
+  this.S = new Array();
+}
+
+// Initialize arcfour context from key, an array of ints, each from [0..255]
+function ARC4init(key) {
+  var i, j, t;
+  for(i = 0; i < 256; ++i)
+    this.S[i] = i;
+  j = 0;
+  for(i = 0; i < 256; ++i) {
+    j = (j + this.S[i] + key[i % key.length]) & 255;
+    t = this.S[i];
+    this.S[i] = this.S[j];
+    this.S[j] = t;
+  }
+  this.i = 0;
+  this.j = 0;
+}
+
+function ARC4next() {
+  var t;
+  this.i = (this.i + 1) & 255;
+  this.j = (this.j + this.S[this.i]) & 255;
+  t = this.S[this.i];
+  this.S[this.i] = this.S[this.j];
+  this.S[this.j] = t;
+  return this.S[(t + this.S[this.i]) & 255];
+}
+
+Arcfour.prototype.init = ARC4init;
+Arcfour.prototype.next = ARC4next;
+
+// Plug in your RNG constructor here
+function prng_newstate() {
+  return new Arcfour();
+}
+
+// Pool size must be a multiple of 4 and greater than 32.
+// An array of bytes the size of the pool will be passed to init()
+var rng_psize = 256;
+
+export {
+  prng_newstate,
+  rng_psize,
+};
@@ -0,0 +1,107 @@
+// Downloaded from http://www-cs-students.stanford.edu/~tjw/jsbn/ by Jeremy White on 6/1/2012
+
+/*
+ * Copyright (c) 2003-2005  Tom Wu
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
+ * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * In addition, the following condition applies:
+ *
+ * All redistributions must retain an intact copy of this copyright notice
+ * and disclaimer.
+ */
+
+
+// Random number generator - requires a PRNG backend, e.g. prng4.js
+import { prng_newstate, rng_psize } from './prng4.js';
+
+// For best results, put code like
+// <body onClick='rng_seed_time();' onKeyPress='rng_seed_time();'>
+// in your main HTML document.
+
+var rng_state;
+var rng_pool;
+var rng_pptr;
+
+// Mix in a 32-bit integer into the pool
+function rng_seed_int(x) {
+  rng_pool[rng_pptr++] ^= x & 255;
+  rng_pool[rng_pptr++] ^= (x >> 8) & 255;
+  rng_pool[rng_pptr++] ^= (x >> 16) & 255;
+  rng_pool[rng_pptr++] ^= (x >> 24) & 255;
+  if(rng_pptr >= rng_psize) rng_pptr -= rng_psize;
+}
+
+// Mix in the current time (w/milliseconds) into the pool
+function rng_seed_time() {
+  rng_seed_int(new Date().getTime());
+}
+
+// Initialize the pool with junk if needed.
+if(rng_pool == null) {
+  rng_pool = new Array();
+  rng_pptr = 0;
+  var t;
+  if(navigator.appName == "Netscape" && navigator.appVersion < "5" && window.crypto) {
+    // Extract entropy (256 bits) from NS4 RNG if available
+    var z = window.crypto.random(32);
+    for(t = 0; t < z.length; ++t)
+      rng_pool[rng_pptr++] = z.charCodeAt(t) & 255;
+  }
+  while(rng_pptr < rng_psize) {  // extract some randomness from Math.random()
+    t = Math.floor(65536 * Math.random());
+    rng_pool[rng_pptr++] = t >>> 8;
+    rng_pool[rng_pptr++] = t & 255;
+  }
+  rng_pptr = 0;
+  rng_seed_time();
+  //rng_seed_int(window.screenX);
+  //rng_seed_int(window.screenY);
+}
+
+function rng_get_byte() {
+  if(rng_state == null) {
+    rng_seed_time();
+    rng_state = prng_newstate();
+    rng_state.init(rng_pool);
+    for(rng_pptr = 0; rng_pptr < rng_pool.length; ++rng_pptr)
+      rng_pool[rng_pptr] = 0;
+    rng_pptr = 0;
+    //rng_pool = null;
+  }
+  // TODO: allow reseeding after first request
+  return rng_state.next();
+}
+
+function rng_get_bytes(ba) {
+  var i;
+  for(i = 0; i < ba.length; ++i) ba[i] = rng_get_byte();
+}
+
+function SecureRandom() {}
+
+SecureRandom.prototype.nextBytes = rng_get_bytes;
+
+export {
+  SecureRandom,
+};
@@ -0,0 +1,153 @@
+// Downloaded from http://www-cs-students.stanford.edu/~tjw/jsbn/ by Jeremy White on 6/1/2012
+// Converted into an ES6 module
+
+/*
+ * Copyright (c) 2003-2005  Tom Wu
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS-IS" AND WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS, IMPLIED OR OTHERWISE, INCLUDING WITHOUT LIMITATION, ANY
+ * WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * IN NO EVENT SHALL TOM WU BE LIABLE FOR ANY SPECIAL, INCIDENTAL,
+ * INDIRECT OR CONSEQUENTIAL DAMAGES OF ANY KIND, OR ANY DAMAGES WHATSOEVER
+ * RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER OR NOT ADVISED OF
+ * THE POSSIBILITY OF DAMAGE, AND ON ANY THEORY OF LIABILITY, ARISING OUT
+ * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ *
+ * In addition, the following condition applies:
+ *
+ * All redistributions must retain an intact copy of this copyright notice
+ * and disclaimer.
+ */
+
+
+// Depends on jsbn.js and rng.js
+import { BigInteger } from './jsbn.js';
+import { SecureRandom } from './rng.js';
+
+// Version 1.1: support utf-8 encoding in pkcs1pad2
+
+// convert a (hex) string to a bignum object
+function parseBigInt(str,r) {
+  return new BigInteger(str,r);
+}
+
+function linebrk(s,n) {
+  var ret = "";
+  var i = 0;
+  while(i + n < s.length) {
+    ret += s.substring(i,i+n) + "\n";
+    i += n;
+  }
+  return ret + s.substring(i,s.length);
+}
+
+function byte2Hex(b) {
+  if(b < 0x10)
+    return "0" + b.toString(16);
+  else
+    return b.toString(16);
+}
+
+// PKCS#1 (type 2, random) pad input string s to n bytes, and return a bigint
+function pkcs1pad2(s,n) {
+  if(n < s.length + 11) { // TODO: fix for utf-8
+    alert("Message too long for RSA");
+    return null;
+  }
+  var ba = new Array();
+  var i = s.length - 1;
+  while(i >= 0 && n > 0) {
+    var c = s.charCodeAt(i--);
+    if(c < 128) { // encode using utf-8
+      ba[--n] = c;
+    }
+    else if((c > 127) && (c < 2048)) {
+      ba[--n] = (c & 63) | 128;
+      ba[--n] = (c >> 6) | 192;
+    }
+    else {
+      ba[--n] = (c & 63) | 128;
+      ba[--n] = ((c >> 6) & 63) | 128;
+      ba[--n] = (c >> 12) | 224;
+    }
+  }
+  ba[--n] = 0;
+  var rng = new SecureRandom();
+  var x = new Array();
+  while(n > 2) { // random non-zero pad
+    x[0] = 0;
+    while(x[0] == 0) rng.nextBytes(x);
+    ba[--n] = x[0];
+  }
+  ba[--n] = 2;
+  ba[--n] = 0;
+  return new BigInteger(ba);
+}
+
+// "empty" RSA key constructor
+function RSAKey() {
+  this.n = null;
+  this.e = 0;
+  this.d = null;
+  this.p = null;
+  this.q = null;
+  this.dmp1 = null;
+  this.dmq1 = null;
+  this.coeff = null;
+}
+
+// Set the public key fields N and e from hex strings
+function RSASetPublic(N,E) {
+  if(N != null && E != null && N.length > 0 && E.length > 0) {
+    this.n = parseBigInt(N,16);
+    this.e = parseInt(E,16);
+  }
+  else
+    alert("Invalid RSA public key");
+}
+
+// Perform raw public operation on "x": return x^e (mod n)
+function RSADoPublic(x) {
+  return x.modPowInt(this.e, this.n);
+}
+
+// Return the PKCS#1 RSA encryption of "text" as an even-length hex string
+function RSAEncrypt(text) {
+  var m = pkcs1pad2(text,(this.n.bitLength()+7)>>3);
+  if(m == null) return null;
+  var c = this.doPublic(m);
+  if(c == null) return null;
+  var h = c.toString(16);
+  if((h.length & 1) == 0) return h; else return "0" + h;
+}
+
+// Return the PKCS#1 RSA encryption of "text" as a Base64-encoded string
+//function RSAEncryptB64(text) {
+//  var h = this.encrypt(text);
+//  if(h) return hex2b64(h); else return null;
+//}
+
+// protected
+RSAKey.prototype.doPublic = RSADoPublic;
+
+// public
+RSAKey.prototype.setPublic = RSASetPublic;
+RSAKey.prototype.encrypt = RSAEncrypt;
+//RSAKey.prototype.encrypt_b64 = RSAEncryptB64;
+
+export {
+  RSAKey,
+};
@@ -0,0 +1,351 @@
+/*
+ * A JavaScript implementation of the Secure Hash Algorithm, SHA-1, as defined
+ * in FIPS 180-1
+ * Version 2.2 Copyright Paul Johnston 2000 - 2009.
+ * Other contributors: Greg Holt, Andrew Kepert, Ydnar, Lostinet
+ * Distributed under the BSD License
+ * See http://pajhome.org.uk/crypt/md5 for details.
+ */
+
+ /* Downloaded 6/1/2012 from the above address by Jeremy White.
+    License reproduce here for completeness:
+
+Copyright (c) 1998 - 2009, Paul Johnston & Contributors
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met:
+
+Redistributions of source code must retain the above copyright notice, this list of conditions and the following disclaimer. Redistributions in binary form must reproduce the above copyright notice, this list of conditions and the following disclaimer in the documentation and/or other materials provided with the distribution.
+
+Neither the name of the author nor the names of its contributors may be used to endorse or promote products derived from this software without specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+ */
+
+/*
+ * Configurable variables. You may need to tweak these to be compatible with
+ * the server-side, but the defaults work in most cases.
+ */
+var hexcase = 0;  /* hex output format. 0 - lowercase; 1 - uppercase        */
+var b64pad  = ""; /* base-64 pad character. "=" for strict RFC compliance   */
+
+/*
+ * These are the functions you'll usually want to call
+ * They take string arguments and return either hex or base-64 encoded strings
+ */
+function hex_sha1(s)    { return rstr2hex(rstr_sha1(str2rstr_utf8(s))); }
+function b64_sha1(s)    { return rstr2b64(rstr_sha1(str2rstr_utf8(s))); }
+function any_sha1(s, e) { return rstr2any(rstr_sha1(str2rstr_utf8(s)), e); }
+function hex_hmac_sha1(k, d)
+  { return rstr2hex(rstr_hmac_sha1(str2rstr_utf8(k), str2rstr_utf8(d))); }
+function b64_hmac_sha1(k, d)
+  { return rstr2b64(rstr_hmac_sha1(str2rstr_utf8(k), str2rstr_utf8(d))); }
+function any_hmac_sha1(k, d, e)
+  { return rstr2any(rstr_hmac_sha1(str2rstr_utf8(k), str2rstr_utf8(d)), e); }
+
+/*
+ * Perform a simple self-test to see if the VM is working
+ */
+function sha1_vm_test()
+{
+  return hex_sha1("abc").toLowerCase() == "a9993e364706816aba3e25717850c26c9cd0d89d";
+}
+
+/*
+ * Calculate the SHA1 of a raw string
+ */
+function rstr_sha1(s)
+{
+  return binb2rstr(binb_sha1(rstr2binb(s), s.length * 8));
+}
+
+/*
+ * Calculate the HMAC-SHA1 of a key and some data (raw strings)
+ */
+function rstr_hmac_sha1(key, data)
+{
+  var bkey = rstr2binb(key);
+  if(bkey.length > 16) bkey = binb_sha1(bkey, key.length * 8);
+
+  var ipad = Array(16), opad = Array(16);
+  for(var i = 0; i < 16; i++)
+  {
+    ipad[i] = bkey[i] ^ 0x36363636;
+    opad[i] = bkey[i] ^ 0x5C5C5C5C;
+  }
+
+  var hash = binb_sha1(ipad.concat(rstr2binb(data)), 512 + data.length * 8);
+  return binb2rstr(binb_sha1(opad.concat(hash), 512 + 160));
+}
+
+/*
+ * Convert a raw string to a hex string
+ */
+function rstr2hex(input)
+{
+  try { hexcase } catch(e) { hexcase=0; }
+  var hex_tab = hexcase ? "0123456789ABCDEF" : "0123456789abcdef";
+  var output = "";
+  var x;
+  for(var i = 0; i < input.length; i++)
+  {
+    x = input.charCodeAt(i);
+    output += hex_tab.charAt((x >>> 4) & 0x0F)
+           +  hex_tab.charAt( x        & 0x0F);
+  }
+  return output;
+}
+
+/*
+ * Convert a raw string to a base-64 string
+ */
+function rstr2b64(input)
+{
+  try { b64pad } catch(e) { b64pad=''; }
+  var tab = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+  var output = "";
+  var len = input.length;
+  for(var i = 0; i < len; i += 3)
+  {
+    var triplet = (input.charCodeAt(i) << 16)
+                | (i + 1 < len ? input.charCodeAt(i+1) << 8 : 0)
+                | (i + 2 < len ? input.charCodeAt(i+2)      : 0);
+    for(var j = 0; j < 4; j++)
+    {
+      if(i * 8 + j * 6 > input.length * 8) output += b64pad;
+      else output += tab.charAt((triplet >>> 6*(3-j)) & 0x3F);
+    }
+  }
+  return output;
+}
+
+/*
+ * Convert a raw string to an arbitrary string encoding
+ */
+function rstr2any(input, encoding)
+{
+  var divisor = encoding.length;
+  var remainders = Array();
+  var i, q, x, quotient;
+
+  /* Convert to an array of 16-bit big-endian values, forming the dividend */
+  var dividend = Array(Math.ceil(input.length / 2));
+  for(i = 0; i < dividend.length; i++)
+  {
+    dividend[i] = (input.charCodeAt(i * 2) << 8) | input.charCodeAt(i * 2 + 1);
+  }
+
+  /*
+   * Repeatedly perform a long division. The binary array forms the dividend,
+   * the length of the encoding is the divisor. Once computed, the quotient
+   * forms the dividend for the next step. We stop when the dividend is zero.
+   * All remainders are stored for later use.
+   */
+  while(dividend.length > 0)
+  {
+    quotient = Array();
+    x = 0;
+    for(i = 0; i < dividend.length; i++)
+    {
+      x = (x << 16) + dividend[i];
+      q = Math.floor(x / divisor);
+      x -= q * divisor;
+      if(quotient.length > 0 || q > 0)
+        quotient[quotient.length] = q;
+    }
+    remainders[remainders.length] = x;
+    dividend = quotient;
+  }
+
+  /* Convert the remainders to the output string */
+  var output = "";
+  for(i = remainders.length - 1; i >= 0; i--)
+    output += encoding.charAt(remainders[i]);
+
+  /* Append leading zero equivalents */
+  var full_length = Math.ceil(input.length * 8 /
+                                    (Math.log(encoding.length) / Math.log(2)))
+  for(i = output.length; i < full_length; i++)
+    output = encoding[0] + output;
+
+  return output;
+}
+
+/*
+ * Encode a string as utf-8.
+ * For efficiency, this assumes the input is valid utf-16.
+ */
+function str2rstr_utf8(input)
+{
+  var output = "";
+  var i = -1;
+  var x, y;
+
+  while(++i < input.length)
+  {
+    /* Decode utf-16 surrogate pairs */
+    x = input.charCodeAt(i);
+    y = i + 1 < input.length ? input.charCodeAt(i + 1) : 0;
+    if(0xD800 <= x && x <= 0xDBFF && 0xDC00 <= y && y <= 0xDFFF)
+    {
+      x = 0x10000 + ((x & 0x03FF) << 10) + (y & 0x03FF);
+      i++;
+    }
+
+    /* Encode output as utf-8 */
+    if(x <= 0x7F)
+      output += String.fromCharCode(x);
+    else if(x <= 0x7FF)
+      output += String.fromCharCode(0xC0 | ((x >>> 6 ) & 0x1F),
+                                    0x80 | ( x         & 0x3F));
+    else if(x <= 0xFFFF)
+      output += String.fromCharCode(0xE0 | ((x >>> 12) & 0x0F),
+                                    0x80 | ((x >>> 6 ) & 0x3F),
+                                    0x80 | ( x         & 0x3F));
+    else if(x <= 0x1FFFFF)
+      output += String.fromCharCode(0xF0 | ((x >>> 18) & 0x07),
+                                    0x80 | ((x >>> 12) & 0x3F),
+                                    0x80 | ((x >>> 6 ) & 0x3F),
+                                    0x80 | ( x         & 0x3F));
+  }
+  return output;
+}
+
+/*
+ * Encode a string as utf-16
+ */
+function str2rstr_utf16le(input)
+{
+  var output = "";
+  for(var i = 0; i < input.length; i++)
+    output += String.fromCharCode( input.charCodeAt(i)        & 0xFF,
+                                  (input.charCodeAt(i) >>> 8) & 0xFF);
+  return output;
+}
+
+function str2rstr_utf16be(input)
+{
+  var output = "";
+  for(var i = 0; i < input.length; i++)
+    output += String.fromCharCode((input.charCodeAt(i) >>> 8) & 0xFF,
+                                   input.charCodeAt(i)        & 0xFF);
+  return output;
+}
+
+/*
+ * Convert a raw string to an array of big-endian words
+ * Characters >255 have their high-byte silently ignored.
+ */
+function rstr2binb(input)
+{
+  var output = Array(input.length >> 2);
+  for(var i = 0; i < output.length; i++)
+    output[i] = 0;
+  for(var i = 0; i < input.length * 8; i += 8)
+    output[i>>5] |= (input.charCodeAt(i / 8) & 0xFF) << (24 - i % 32);
+  return output;
+}
+
+/*
+ * Convert an array of big-endian words to a string
+ */
+function binb2rstr(input)
+{
+  var output = "";
+  for(var i = 0; i < input.length * 32; i += 8)
+    output += String.fromCharCode((input[i>>5] >>> (24 - i % 32)) & 0xFF);
+  return output;
+}
+
+/*
+ * Calculate the SHA-1 of an array of big-endian words, and a bit length
+ */
+function binb_sha1(x, len)
+{
+  /* append padding */
+  x[len >> 5] |= 0x80 << (24 - len % 32);
+  x[((len + 64 >> 9) << 4) + 15] = len;
+
+  var w = Array(80);
+  var a =  1732584193;
+  var b = -271733879;
+  var c = -1732584194;
+  var d =  271733878;
+  var e = -1009589776;
+
+  for(var i = 0; i < x.length; i += 16)
+  {
+    var olda = a;
+    var oldb = b;
+    var oldc = c;
+    var oldd = d;
+    var olde = e;
+
+    for(var j = 0; j < 80; j++)
+    {
+      if(j < 16) w[j] = x[i + j];
+      else w[j] = bit_rol(w[j-3] ^ w[j-8] ^ w[j-14] ^ w[j-16], 1);
+      var t = safe_add(safe_add(bit_rol(a, 5), sha1_ft(j, b, c, d)),
+                       safe_add(safe_add(e, w[j]), sha1_kt(j)));
+      e = d;
+      d = c;
+      c = bit_rol(b, 30);
+      b = a;
+      a = t;
+    }
+
+    a = safe_add(a, olda);
+    b = safe_add(b, oldb);
+    c = safe_add(c, oldc);
+    d = safe_add(d, oldd);
+    e = safe_add(e, olde);
+  }
+  return Array(a, b, c, d, e);
+
+}
+
+/*
+ * Perform the appropriate triplet combination function for the current
+ * iteration
+ */
+function sha1_ft(t, b, c, d)
+{
+  if(t < 20) return (b & c) | ((~b) & d);
+  if(t < 40) return b ^ c ^ d;
+  if(t < 60) return (b & c) | (b & d) | (c & d);
+  return b ^ c ^ d;
+}
+
+/*
+ * Determine the appropriate additive constant for the current iteration
+ */
+function sha1_kt(t)
+{
+  return (t < 20) ?  1518500249 : (t < 40) ?  1859775393 :
+         (t < 60) ? -1894007588 : -899497514;
+}
+
+/*
+ * Add integers, wrapping at 2^32. This uses 16-bit operations internally
+ * to work around bugs in some JS interpreters.
+ */
+function safe_add(x, y)
+{
+  var lsw = (x & 0xFFFF) + (y & 0xFFFF);
+  var msw = (x >> 16) + (y >> 16) + (lsw >> 16);
+  return (msw << 16) | (lsw & 0xFFFF);
+}
+
+/*
+ * Bitwise rotate a 32-bit number to the left.
+ */
+function bit_rol(num, cnt)
+{
+  return (num << cnt) | (num >>> (32 - cnt));
+}
+
+export {
+  hex_sha1,
+  rstr_sha1,
+};
@@ -0,0 +1,268 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import { RSAKey } from './thirdparty/rsa.js';
+import { BigInteger } from './thirdparty/jsbn.js';
+import { SecureRandom } from './thirdparty/rng.js';
+import { rstr_sha1 } from './thirdparty/sha1.js';
+
+var SHA_DIGEST_LENGTH = 20;
+
+/*----------------------------------------------------------------------------
+**  General ticket RSA encryption functions - just good enough to
+**      support what we need to send back an encrypted ticket.
+**--------------------------------------------------------------------------*/
+
+
+/*----------------------------------------------------------------------------
+**  OAEP padding functions.  Inspired by the OpenSSL implementation.
+**--------------------------------------------------------------------------*/
+function MGF1(mask, seed)
+{
+    var i, j, outlen;
+    for (i = 0, outlen = 0; outlen < mask.length; i++)
+    {
+        var combo_buf = new String;
+
+        for (j = 0; j < seed.length; j++)
+            combo_buf += String.fromCharCode(seed[j]);
+        combo_buf += String.fromCharCode((i >> 24) & 255);
+        combo_buf += String.fromCharCode((i >> 16) & 255);
+        combo_buf += String.fromCharCode((i >> 8)  & 255);
+        combo_buf += String.fromCharCode((i)       & 255);
+
+        var combo_hash = rstr_sha1(combo_buf);
+        for (j = 0; j < combo_hash.length && outlen < mask.length; j++, outlen++)
+        {
+            mask[outlen] = combo_hash.charCodeAt(j);
+        }
+    }
+}
+
+
+function RSA_padding_add_PKCS1_OAEP(tolen, from, param)
+{
+    var seed = new Array(SHA_DIGEST_LENGTH);
+    var rand = new SecureRandom();
+    rand.nextBytes(seed);
+
+    var dblen = tolen - 1 - seed.length;
+    var db = new Array(dblen);
+    var padlen = dblen - from.length - 1;
+    var i;
+
+    if (param === undefined)
+        param = "";
+
+    if (padlen < SHA_DIGEST_LENGTH)
+    {
+        console.log("Error - data too large for key size.");
+        return null;
+    }
+
+    for (i = 0; i < padlen; i++)
+        db[i] = 0;
+
+    var param_hash = rstr_sha1(param);
+    for (i = 0; i < param_hash.length; i++)
+        db[i] = param_hash.charCodeAt(i);
+
+    db[padlen] = 1;
+    for (i = 0; i < from.length; i++)
+        db[i + padlen + 1] = from.charCodeAt(i);
+
+    var dbmask = new Array(dblen);
+    if (MGF1(dbmask, seed) < 0)
+            return null;
+
+    for (i = 0; i < dbmask.length; i++)
+        db[i] ^= dbmask[i];
+
+
+    var seedmask = Array(SHA_DIGEST_LENGTH);
+    if (MGF1(seedmask, db) < 0)
+            return null;
+
+    for (i = 0; i < seedmask.length; i++)
+        seed[i] ^= seedmask[i];
+
+    var ret = new String;
+    ret += String.fromCharCode(0);
+    for (i = 0; i < seed.length; i++)
+        ret += String.fromCharCode(seed[i]);
+    for (i = 0; i < db.length; i++)
+        ret += String.fromCharCode(db[i]);
+    return ret;
+}
+
+
+function asn_get_length(u8, at)
+{
+    var len = u8[at++];
+    if (len > 0x80)
+    {
+        if (len != 0x81)
+        {
+            console.log("Error:  we lazily don't support keys bigger than 255 bytes.  It'd be easy to fix.");
+            return null;
+        }
+        len = u8[at++];
+    }
+
+    return [ at, len];
+}
+
+function find_sequence(u8, at)
+{
+    var lenblock;
+    at = at || 0;
+    if (u8[at++] != 0x30)
+    {
+        console.log("Error:  public key should start with a sequence flag.");
+        return null;
+    }
+
+    lenblock = asn_get_length(u8, at);
+    if (! lenblock)
+        return null;
+    return lenblock;
+}
+
+/*----------------------------------------------------------------------------
+**  Extract an RSA key from a memory buffer
+**--------------------------------------------------------------------------*/
+function create_rsa_from_mb(mb, at)
+{
+    var u8 = new Uint8Array(mb);
+    var lenblock;
+    var seq;
+    var ba;
+    var i;
+    var ret;
+
+    /* We have a sequence which contains a sequence followed by a bit string */
+    seq = find_sequence(u8, at);
+    if (! seq)
+        return null;
+
+    at = seq[0];
+    seq = find_sequence(u8, at);
+    if (! seq)
+        return null;
+
+    /* Skip over the contained sequence */
+    at = seq[0] + seq[1];
+    if (u8[at++] != 0x3)
+    {
+        console.log("Error: expecting bit string next.");
+        return null;
+    }
+
+    /* Get the bit string, which is *itself* a sequence.  Having fun yet? */
+    lenblock = asn_get_length(u8, at);
+    if (! lenblock)
+        return null;
+
+    at = lenblock[0];
+    /* Or, not and: the bit string is malformed if EITHER the unused-bits
+       byte is nonzero or the sequence tag is missing.  Requiring both to
+       be wrong let malformed keys through to be garbage-parsed. */
+    if (u8[at] != 0 || u8[at + 1] != 0x30)
+    {
+        console.log("Error: unexpected values in bit string.");
+        return null;
+    }
+
+    /* Okay, now we have a sequence of two binary values, we hope. */
+    seq = find_sequence(u8, at + 1);
+    if (! seq)
+        return null;
+
+    at = seq[0];
+    if (u8[at++] != 0x02)
+    {
+        console.log("Error: expecting integer n next.");
+        return null;
+    }
+    lenblock = asn_get_length(u8, at);
+    if (! lenblock)
+        return null;
+    at = lenblock[0];
+
+    ba = new Array(lenblock[1]);
+    for (i = 0; i < lenblock[1]; i++)
+        ba[i] = u8[at + i];
+
+    ret = new RSAKey();
+    ret.n = new BigInteger(ba);
+
+    at += lenblock[1];
+
+    if (u8[at++] != 0x02)
+    {
+        console.log("Error: expecting integer e next.");
+        return null;
+    }
+    lenblock = asn_get_length(u8, at);
+    if (! lenblock)
+        return null;
+    at = lenblock[0];
+
+    ret.e = u8[at++];
+    for (i = 1; i < lenblock[1]; i++)
+    {
+        ret.e <<= 8;
+        ret.e |= u8[at++];
+    }
+
+    return ret;
+}
+
+function rsa_encrypt(rsa, str)
+{
+    var i;
+    var ret = [];
+    var oaep = RSA_padding_add_PKCS1_OAEP((rsa.n.bitLength()+7)>>3, str);
+    if (! oaep)
+        return null;
+
+    var ba = new Array(oaep.length);
+
+    for (i = 0; i < oaep.length; i++)
+        ba[i] = oaep.charCodeAt(i);
+    var bigint = new BigInteger(ba);
+    var enc = rsa.doPublic(bigint);
+    var h = enc.toString(16);
+
+    /* BigInteger.toString() drops leading zeros, and the ticket field the
+       caller writes this into is padded at the tail, so a short result
+       would shift the whole ciphertext.  Pad back to the modulus width. */
+    var hexlen = ((rsa.n.bitLength() + 7) >> 3) * 2;
+    while (h.length < hexlen)
+        h = "0" + h;
+    for (i = 0; i < h.length; i += 2)
+        ret[i / 2] = parseInt(h.substring(i, i + 2), 16);
+    return ret;
+}
+
+export {
+  create_rsa_from_mb,
+  rsa_encrypt,
+};
@@ -0,0 +1,368 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+import { KeyNames } from './atKeynames.js';
+import { code_to_scancode } from './code_to_scancode.js';
+
+/*----------------------------------------------------------------------------
+**  Utility settings and functions for Spice
+**--------------------------------------------------------------------------*/
+var DEBUG = 0;
+var PLAYBACK_DEBUG = 0;
+var STREAM_DEBUG = 0;
+var DUMP_DRAWS = false;
+var DUMP_CANVASES = false;
+
+/*----------------------------------------------------------------------------
+**  We use an Image temporarily, and the image/src does not get garbage
+**   collected as quickly as we might like.  This blank image helps with that.
+**--------------------------------------------------------------------------*/
+var EMPTY_GIF_IMAGE = "data:image/gif;base64,R0lGODlhAQABAAD/ACwAAAAAAQABAAACADs=";
+
+/*----------------------------------------------------------------------------
+**  combine_array_buffers
+**      Combine two array buffers.
+**      FIXME - this can't be optimal.  See wire.js about eliminating the need.
+**--------------------------------------------------------------------------*/
+function combine_array_buffers(a1, a2)
+{
+    var in1 = new Uint8Array(a1);
+    var in2 = new Uint8Array(a2);
+    var ret = new ArrayBuffer(a1.byteLength + a2.byteLength);
+    var out = new Uint8Array(ret);
+    var o = 0;
+    var i;
+    for (i = 0; i < in1.length; i++)
+        out[o++] = in1[i];
+    for (i = 0; i < in2.length; i++)
+        out[o++] = in2[i];
+
+    return ret;
+}
+
+/*----------------------------------------------------------------------------
+**  hexdump_buffer
+**--------------------------------------------------------------------------*/
+function hexdump_buffer(a)
+{
+    var mg = new Uint8Array(a);
+    var hex = "";
+    var str = "";
+    var last_zeros = 0;
+    for (var i = 0; i < mg.length; i++)
+    {
+        var h = Number(mg[i]).toString(16);
+        if (h.length == 1)
+            hex += "0";
+        hex += h + " ";
+
+        if (mg[i] == 10 || mg[i] == 13 || mg[i] == 8)
+            str += ".";
+        else
+            str += String.fromCharCode(mg[i]);
+
+        if ((i % 16 == 15) || (i == (mg.length - 1)))
+        {
+            while (i % 16 != 15)
+            {
+                hex += "   ";
+                i++;
+            }
+
+            if (last_zeros == 0)
+                console.log(hex + " | " + str);
+
+            if (hex == "00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ")
+            {
+                if (last_zeros == 1)
+                {
+                    console.log(".");
+                    last_zeros++;
+                }
+                else if (last_zeros == 0)
+                    last_zeros++;
+            }
+            else
+                last_zeros = 0;
+
+            hex = str = "";
+        }
+    }
+}
+
+/*----------------------------------------------------------------------------
+**  Convert arraybuffer to string
+**--------------------------------------------------------------------------*/
+function arraybuffer_to_str(buf) {
+  return String.fromCharCode.apply(null, new Uint16Array(buf));
+}
+
+/*----------------------------------------------------------------------------
+** Converting browser keycodes to AT scancodes is very hard.
+**  Spice transmits keys using the original AT scan codes, often
+**   described as 'Scan Code Set 1'.
+**  There is a confusion of other scan codes; Xorg synthesizes it's
+**   own in the same atKeynames.c file that has the XT codes.
+**  Scan code set 2 and 3 are more common, and use different values.
+** Further, there is no formal specification for keycodes
+**  returned by browsers, so we have done our mapping largely with
+**  empirical testing.
+** There has been little rigorous testing with International keyboards,
+**  and this would be an easy area for non English speakers to contribute.
+**--------------------------------------------------------------------------*/
+var common_scanmap = [];
+
+/* The following appear to be keycodes that work in most browsers */
+common_scanmap['1'.charCodeAt(0)]  = KeyNames.KEY_1;
+common_scanmap['2'.charCodeAt(0)]  = KeyNames.KEY_2;
+common_scanmap['3'.charCodeAt(0)]  = KeyNames.KEY_3;
+common_scanmap['4'.charCodeAt(0)]  = KeyNames.KEY_4;
+common_scanmap['5'.charCodeAt(0)]  = KeyNames.KEY_5;
+common_scanmap['6'.charCodeAt(0)]  = KeyNames.KEY_6;
+common_scanmap['7'.charCodeAt(0)]  = KeyNames.KEY_7;
+common_scanmap['8'.charCodeAt(0)]  = KeyNames.KEY_8;
+common_scanmap['9'.charCodeAt(0)]  = KeyNames.KEY_9;
+common_scanmap['0'.charCodeAt(0)]  = KeyNames.KEY_0;
+common_scanmap[145]                = KeyNames.KEY_ScrollLock;
+common_scanmap[103]                = KeyNames.KEY_KP_7;
+common_scanmap[104]                = KeyNames.KEY_KP_8;
+common_scanmap[105]                = KeyNames.KEY_KP_9;
+common_scanmap[100]                = KeyNames.KEY_KP_4;
+common_scanmap[101]                = KeyNames.KEY_KP_5;
+common_scanmap[102]                = KeyNames.KEY_KP_6;
+common_scanmap[107]                = KeyNames.KEY_KP_Plus;
+common_scanmap[97]                 = KeyNames.KEY_KP_1;
+common_scanmap[98]                 = KeyNames.KEY_KP_2;
+common_scanmap[99]                 = KeyNames.KEY_KP_3;
+common_scanmap[96]                 = KeyNames.KEY_KP_0;
+common_scanmap[109]                = KeyNames.KEY_Minus;
+common_scanmap[110]                = KeyNames.KEY_KP_Decimal;
+common_scanmap[191]                = KeyNames.KEY_Slash;
+common_scanmap[190]                = KeyNames.KEY_Period;
+common_scanmap[188]                = KeyNames.KEY_Comma;
+common_scanmap[220]                = KeyNames.KEY_BSlash;
+common_scanmap[192]                = KeyNames.KEY_Tilde;
+common_scanmap[222]                = KeyNames.KEY_Quote;
+common_scanmap[219]                = KeyNames.KEY_LBrace;
+common_scanmap[221]                = KeyNames.KEY_RBrace;
+
+common_scanmap['Q'.charCodeAt(0)]  = KeyNames.KEY_Q;
+common_scanmap['W'.charCodeAt(0)]  = KeyNames.KEY_W;
+common_scanmap['E'.charCodeAt(0)]  = KeyNames.KEY_E;
+common_scanmap['R'.charCodeAt(0)]  = KeyNames.KEY_R;
+common_scanmap['T'.charCodeAt(0)]  = KeyNames.KEY_T;
+common_scanmap['Y'.charCodeAt(0)]  = KeyNames.KEY_Y;
+common_scanmap['U'.charCodeAt(0)]  = KeyNames.KEY_U;
+common_scanmap['I'.charCodeAt(0)]  = KeyNames.KEY_I;
+common_scanmap['O'.charCodeAt(0)]  = KeyNames.KEY_O;
+common_scanmap['P'.charCodeAt(0)]  = KeyNames.KEY_P;
+common_scanmap['A'.charCodeAt(0)]  = KeyNames.KEY_A;
+common_scanmap['S'.charCodeAt(0)]  = KeyNames.KEY_S;
+common_scanmap['D'.charCodeAt(0)]  = KeyNames.KEY_D;
+common_scanmap['F'.charCodeAt(0)]  = KeyNames.KEY_F;
+common_scanmap['G'.charCodeAt(0)]  = KeyNames.KEY_G;
+common_scanmap['H'.charCodeAt(0)]  = KeyNames.KEY_H;
+common_scanmap['J'.charCodeAt(0)]  = KeyNames.KEY_J;
+common_scanmap['K'.charCodeAt(0)]  = KeyNames.KEY_K;
+common_scanmap['L'.charCodeAt(0)]  = KeyNames.KEY_L;
+common_scanmap['Z'.charCodeAt(0)]  = KeyNames.KEY_Z;
+common_scanmap['X'.charCodeAt(0)]  = KeyNames.KEY_X;
+common_scanmap['C'.charCodeAt(0)]  = KeyNames.KEY_C;
+common_scanmap['V'.charCodeAt(0)]  = KeyNames.KEY_V;
+common_scanmap['B'.charCodeAt(0)]  = KeyNames.KEY_B;
+common_scanmap['N'.charCodeAt(0)]  = KeyNames.KEY_N;
+common_scanmap['M'.charCodeAt(0)]  = KeyNames.KEY_M;
+common_scanmap[' '.charCodeAt(0)]  = KeyNames.KEY_Space;
+common_scanmap[13]                 = KeyNames.KEY_Enter;
+common_scanmap[27]                 = KeyNames.KEY_Escape;
+common_scanmap[8]                  = KeyNames.KEY_BackSpace;
+common_scanmap[9]                  = KeyNames.KEY_Tab;
+common_scanmap[16]                 = KeyNames.KEY_ShiftL;
+common_scanmap[17]                 = KeyNames.KEY_LCtrl;
+common_scanmap[18]                 = KeyNames.KEY_Alt;
+common_scanmap[20]                 = KeyNames.KEY_CapsLock;
+common_scanmap[44]                 = KeyNames.KEY_SysReqest;
+common_scanmap[144]                = KeyNames.KEY_NumLock;
+common_scanmap[112]                = KeyNames.KEY_F1;
+common_scanmap[113]                = KeyNames.KEY_F2;
+common_scanmap[114]                = KeyNames.KEY_F3;
+common_scanmap[115]                = KeyNames.KEY_F4;
+common_scanmap[116]                = KeyNames.KEY_F5;
+common_scanmap[117]                = KeyNames.KEY_F6;
+common_scanmap[118]                = KeyNames.KEY_F7;
+common_scanmap[119]                = KeyNames.KEY_F8;
+common_scanmap[120]                = KeyNames.KEY_F9;
+common_scanmap[121]                = KeyNames.KEY_F10;
+common_scanmap[122]                = KeyNames.KEY_F11;
+common_scanmap[123]                = KeyNames.KEY_F12;
+
+/* TODO:  Break and Print are complex scan codes.  XSpice cheats and
+   uses Xorg synthesized codes to simplify them.  Fixing this will
+   require XSpice to handle the scan codes correctly, and then
+   fix spice-html5 to send the complex scan codes. */
+common_scanmap[42]                 = 99; // Print, XSpice only
+common_scanmap[19]                 = 101;// Break, XSpice only
+
+/* Handle the so called 'GREY' keys, for the extended keys that
+   were grey on the original AT keyboard.  These are
+   prefixed, as they were on the PS/2 controller, with an
+   0xE0 byte to indicate that they are extended */
+common_scanmap[111]                = 0xE0 | (KeyNames.KEY_Slash << 8);// KP_Divide
+common_scanmap[106]                = 0xE0 | (KeyNames.KEY_KP_Multiply << 8); // KP_Multiply
+common_scanmap[36]                 = 0xE0 | (KeyNames.KEY_KP_7 << 8); // Home
+common_scanmap[38]                 = 0xE0 | (KeyNames.KEY_KP_8 << 8); // Up
+common_scanmap[33]                 = 0xE0 | (KeyNames.KEY_KP_9 << 8); // PgUp
+common_scanmap[37]                 = 0xE0 | (KeyNames.KEY_KP_4 << 8); // Left
+common_scanmap[39]                 = 0xE0 | (KeyNames.KEY_KP_6 << 8); // Right
+common_scanmap[35]                 = 0xE0 | (KeyNames.KEY_KP_1 << 8); // End
+common_scanmap[40]                 = 0xE0 | (KeyNames.KEY_KP_2 << 8); // Down
+common_scanmap[34]                 = 0xE0 | (KeyNames.KEY_KP_3 << 8); // PgDown
+common_scanmap[45]                 = 0xE0 | (KeyNames.KEY_KP_0 << 8); // Insert
+common_scanmap[46]                 = 0xE0 | (KeyNames.KEY_KP_Decimal << 8); // Delete
+common_scanmap[91]                 = 0xE0 | (0x5B << 8); //KeyNames.KEY_LMeta
+common_scanmap[92]                 = 0xE0 | (0x5C << 8); //KeyNames.KEY_RMeta
+common_scanmap[93]                 = 0xE0 | (0x5D << 8); //KeyNames.KEY_Menu
+
+/* Firefox/Mozilla codes */
+var firefox_scanmap = [];
+firefox_scanmap[173]                = KeyNames.KEY_Minus;
+firefox_scanmap[61]                 = KeyNames.KEY_Equal;
+firefox_scanmap[59]                 = KeyNames.KEY_SemiColon;
+
+/* DOM3 codes */
+var DOM_scanmap = [];
+DOM_scanmap[189]                = KeyNames.KEY_Minus;
+DOM_scanmap[187]                = KeyNames.KEY_Equal;
+DOM_scanmap[186]                = KeyNames.KEY_SemiColon;
+
+function get_scancode(keyCode, code)
+{
+    if (code_to_scancode[code] !== undefined) {
+        return code_to_scancode[code];
+    }
+
+    if (common_scanmap[keyCode] === undefined)
+    {
+        if (navigator.userAgent.indexOf("Firefox") != -1)
+            return firefox_scanmap[keyCode];
+        else
+            return DOM_scanmap[keyCode];
+    }
+    else
+        return common_scanmap[keyCode];
+}
+
+function keycode_to_start_scan(keyCode, code)
+{
+    var scancode = get_scancode(keyCode, code);
+    if (scancode === undefined)
+    {
+        /* Not an alert: a modal steals the keyboard mid-typing, and an
+           unmapped key (e.g. Firefox reports keyCode 224 for Meta) is
+           an ordinary event, not an emergency. */
+        console.warn('no map for ' + keyCode);
+        return 0;
+    }
+
+    return scancode;
+}
+
+function keycode_to_end_scan(keyCode, code)
+{
+    var scancode = get_scancode(keyCode, code);
+    if (scancode === undefined)
+        return 0;
+
+    if (scancode < 0x100) {
+        return scancode | 0x80;
+    } else {
+        return scancode | 0x8000;
+    }
+}
+
+function dump_media_element(m)
+{
+    var ret =
+            "[networkState " + m.networkState +
+            "|readyState " + m.readyState +
+            "|error " + m.error +
+            "|seeking " + m.seeking +
+            "|duration " + m.duration +
+            "|paused " + m.paused +
+            "|ended " + m.error +
+            "|buffered " + dump_timerange(m.buffered) +
+            "]";
+    return ret;
+}
+
+function dump_media_source(ms)
+{
+    var ret =
+            "[duration " + ms.duration +
+            "|readyState " + ms.readyState + "]";
+    return ret;
+}
+
+function dump_source_buffer(sb)
+{
+    var ret =
+            "[appendWindowStart " + sb.appendWindowStart +
+            "|appendWindowEnd " + sb.appendWindowEnd +
+            "|buffered " + dump_timerange(sb.buffered) +
+            "|timeStampOffset " + sb.timeStampOffset +
+            "|updating " + sb.updating +
+            "]";
+    return ret;
+}
+
+function dump_timerange(tr)
+{
+    var ret;
+
+    if (tr)
+    {
+        var i = tr.length;
+        ret = "{len " + i;
+        if (i > 0)
+            ret += "; start " + tr.start(0) + "; end " + tr.end(i - 1);
+        ret += "}";
+    }
+    else
+        ret = "N/A";
+
+    return ret;
+}
+
+export {
+  DEBUG,
+  PLAYBACK_DEBUG,
+  STREAM_DEBUG,
+  DUMP_DRAWS,
+  DUMP_CANVASES,
+  EMPTY_GIF_IMAGE,
+  combine_array_buffers,
+  hexdump_buffer,
+  arraybuffer_to_str,
+  keycode_to_start_scan,
+  keycode_to_end_scan,
+  dump_media_element,
+  dump_media_source,
+  dump_source_buffer,
+};
@@ -0,0 +1,673 @@
+"use strict";
+/*
+   Copyright (C) 2014 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+
+/*----------------------------------------------------------------------------
+**  EBML identifiers
+**--------------------------------------------------------------------------*/
+var EBML_HEADER =                           [ 0x1a, 0x45, 0xdf, 0xa3 ];
+var EBML_HEADER_VERSION =                   [ 0x42, 0x86 ];
+var EBML_HEADER_READ_VERSION =              [ 0x42, 0xf7 ];
+var EBML_HEADER_MAX_ID_LENGTH =             [ 0x42, 0xf2 ];
+var EBML_HEADER_MAX_SIZE_LENGTH =           [ 0x42, 0xf3 ];
+var EBML_HEADER_DOC_TYPE =                  [ 0x42, 0x82 ];
+var EBML_HEADER_DOC_TYPE_VERSION =          [ 0x42, 0x87 ];
+var EBML_HEADER_DOC_TYPE_READ_VERSION =     [ 0x42, 0x85 ];
+
+var WEBM_SEGMENT_HEADER =                   [ 0x18, 0x53, 0x80, 0x67 ];
+var WEBM_SEGMENT_INFORMATION =              [ 0x15, 0x49, 0xA9, 0x66 ];
+
+var WEBM_TIMECODE_SCALE =                   [ 0x2A, 0xD7, 0xB1 ];
+var WEBM_MUXING_APP =                       [ 0x4D, 0x80 ];
+var WEBM_WRITING_APP =                      [ 0x57, 0x41 ];
+
+var WEBM_SEEK_HEAD =                        [ 0x11, 0x4D, 0x9B, 0x74 ];
+var WEBM_SEEK =                             [ 0x4D, 0xBB ];
+var WEBM_SEEK_ID =                          [ 0x53, 0xAB ];
+var WEBM_SEEK_POSITION =                    [ 0x53, 0xAC ];
+
+var WEBM_TRACKS =                           [ 0x16, 0x54, 0xAE, 0x6B ];
+var WEBM_TRACK_ENTRY =                      [ 0xAE ];
+var WEBM_TRACK_NUMBER =                     [ 0xD7 ];
+var WEBM_TRACK_UID =                        [ 0x73, 0xC5 ];
+var WEBM_TRACK_TYPE =                       [ 0x83 ];
+var WEBM_FLAG_ENABLED =                     [ 0xB9 ];
+var WEBM_FLAG_DEFAULT =                     [ 0x88 ];
+var WEBM_FLAG_FORCED =                      [ 0x55, 0xAA ];
+var WEBM_FLAG_LACING =                      [ 0x9C ];
+var WEBM_MIN_CACHE =                        [ 0x6D, 0xE7 ];
+
+var WEBM_MAX_BLOCK_ADDITION_ID =            [ 0x55, 0xEE ];
+var WEBM_CODEC_DECODE_ALL =                 [ 0xAA ];
+var WEBM_SEEK_PRE_ROLL =                    [ 0x56, 0xBB ];
+var WEBM_CODEC_DELAY =                      [ 0x56, 0xAA ];
+var WEBM_CODEC_PRIVATE =                    [ 0x63, 0xA2 ];
+var WEBM_CODEC_ID =                         [ 0x86 ];
+
+var WEBM_VIDEO =                            [ 0xE0 ] ;
+var WEBM_FLAG_INTERLACED =                  [ 0x9A ] ;
+var WEBM_PIXEL_WIDTH =                      [ 0xB0 ] ;
+var WEBM_PIXEL_HEIGHT =                     [ 0xBA ] ;
+
+var WEBM_AUDIO =                            [ 0xE1 ] ;
+var WEBM_SAMPLING_FREQUENCY =               [ 0xB5 ] ;
+var WEBM_CHANNELS =                         [ 0x9F ] ;
+
+var WEBM_CLUSTER =                          [ 0x1F, 0x43, 0xB6, 0x75 ];
+var WEBM_TIME_CODE =                        [ 0xE7 ] ;
+var WEBM_SIMPLE_BLOCK =                     [ 0xA3 ] ;
+
+/*----------------------------------------------------------------------------
+**  Various OPUS / Webm constants
+**--------------------------------------------------------------------------*/
+var Constants = {
+  CLUSTER_SIMPLEBLOCK_FLAG_KEYFRAME       : 1 << 7,
+
+  OPUS_FREQUENCY                          : 48000,
+  OPUS_CHANNELS                           : 2,
+
+  SPICE_PLAYBACK_CODEC                    : 'audio/webm; codecs="opus"',
+  MAX_CLUSTER_TIME                        : 1000,
+
+  EXPECTED_PACKET_DURATION                : 10,
+  GAP_DETECTION_THRESHOLD                 : 50,
+
+  SPICE_VP8_CODEC                         : 'video/webm; codecs="vp8"',
+};
+
+/*----------------------------------------------------------------------------
+**  EBML utility functions
+**      These classes can create the binary representation of a webm file
+**--------------------------------------------------------------------------*/
+function EBML_write_u1_data_len(len, dv, at)
+{
+    var b = 0x80 | len;
+    dv.setUint8(at, b);
+    return at + 1;
+}
+
+function EBML_write_u8_value(id, val, dv, at)
+{
+    at = EBML_write_array(id, dv, at);
+    at = EBML_write_u1_data_len(1, dv, at);
+    dv.setUint8(at, val);
+    return at + 1;
+}
+
+function EBML_write_u32_value(id, val, dv, at)
+{
+    at = EBML_write_array(id, dv, at);
+    at = EBML_write_u1_data_len(4, dv, at);
+    dv.setUint32(at, val);
+    return at + 4;
+}
+
+function EBML_write_u16_value(id, val, dv, at)
+{
+    at = EBML_write_array(id, dv, at);
+    at = EBML_write_u1_data_len(2, dv, at);
+    dv.setUint16(at, val);
+    return at + 2;
+}
+
+function EBML_write_float_value(id, val, dv, at)
+{
+    at = EBML_write_array(id, dv, at);
+    at = EBML_write_u1_data_len(4, dv, at);
+    dv.setFloat32(at, val);
+    return at + 4;
+}
+
+
+
+function EBML_write_u64_data_len(len, dv, at)
+{
+    /* Javascript doesn't do 64 bit ints, so this cheats and
+        just has a max of 32 bits.  Fine for our purposes */
+    dv.setUint8(at++, 0x01);
+    dv.setUint8(at++, 0x00);
+    dv.setUint8(at++, 0x00);
+    dv.setUint8(at++, 0x00);
+    var val = len & 0xFFFFFFFF;
+    for (var shift = 24; shift >= 0; shift -= 8)
+        dv.setUint8(at++, val >> shift);
+    return at;
+}
+
+function EBML_write_array(arr, dv, at)
+{
+    for (var i = 0; i < arr.length; i++)
+        dv.setUint8(at + i, arr[i]);
+    return at + arr.length;
+}
+
+function EBML_write_string(str, dv, at)
+{
+    for (var i = 0; i < str.length; i++)
+        dv.setUint8(at + i, str.charCodeAt(i));
+    return at + str.length;
+}
+
+function EBML_write_data(id, data, dv, at)
+{
+    at = EBML_write_array(id, dv, at);
+    if (data.length < 127)
+        at = EBML_write_u1_data_len(data.length, dv, at);
+    else
+        at = EBML_write_u64_data_len(data.length, dv, at);
+    if ((typeof data) == "string")
+        at = EBML_write_string(data, dv, at);
+    else
+        at = EBML_write_array(data, dv, at);
+    return at;
+}
+
+/*----------------------------------------------------------------------------
+**  Webm objects
+**      These classes can create the binary representation of a webm file
+**--------------------------------------------------------------------------*/
+function EBMLHeader()
+{
+    this.id = EBML_HEADER;
+    this.Version = 1;
+    this.ReadVersion = 1;
+    this.MaxIDLength = 4;
+    this.MaxSizeLength = 8;
+    this.DocType = "webm";
+    this.DocTypeVersion = 2;  /* Not well specified by the WebM guys, but functionally required for Firefox */
+    this.DocTypeReadVersion = 2;
+}
+
+EBMLHeader.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(0x1f, dv, at);
+        at = EBML_write_u8_value(EBML_HEADER_VERSION, this.Version, dv, at);
+        at = EBML_write_u8_value(EBML_HEADER_READ_VERSION, this.ReadVersion, dv, at);
+        at = EBML_write_u8_value(EBML_HEADER_MAX_ID_LENGTH, this.MaxIDLength, dv, at);
+        at = EBML_write_u8_value(EBML_HEADER_MAX_SIZE_LENGTH, this.MaxSizeLength, dv, at);
+        at = EBML_write_data(EBML_HEADER_DOC_TYPE, this.DocType, dv, at);
+        at = EBML_write_u8_value(EBML_HEADER_DOC_TYPE_VERSION, this.DocTypeVersion, dv, at);
+        at = EBML_write_u8_value(EBML_HEADER_DOC_TYPE_READ_VERSION, this.DocTypeReadVersion, dv, at);
+
+        return at;
+    },
+    buffer_size: function()
+    {
+        return 0x1f + 8 + this.id.length;
+    },
+}
+
+function webm_Segment()
+{
+    this.id = WEBM_SEGMENT_HEADER;
+}
+
+webm_Segment.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+
+        at = EBML_write_array(this.id, dv, at);
+        dv.setUint8(at++, 0xff);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 1;
+    },
+}
+
+function webm_SegmentInformation()
+{
+    this.id = WEBM_SEGMENT_INFORMATION;
+    this.timecode_scale = 1000000; /* 1 ms */
+    this.muxing_app = "spice";
+    this.writing_app = "spice-html5";
+
+}
+
+webm_SegmentInformation.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+        at = EBML_write_u32_value(WEBM_TIMECODE_SCALE, this.timecode_scale, dv, at);
+        at = EBML_write_data(WEBM_MUXING_APP, this.muxing_app, dv, at);
+        at = EBML_write_data(WEBM_WRITING_APP, this.writing_app, dv, at);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+                 WEBM_TIMECODE_SCALE.length + 1 + 4 +
+                 WEBM_MUXING_APP.length + 1 + this.muxing_app.length +
+                 WEBM_WRITING_APP.length + 1 + this.writing_app.length;
+    },
+}
+
+function webm_Audio(frequency)
+{
+    this.id = WEBM_AUDIO;
+    this.sampling_frequency = frequency;
+    this.channels = Constants.OPUS_CHANNELS;
+}
+
+webm_Audio.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+        at = EBML_write_u8_value(WEBM_CHANNELS, this.channels, dv, at);
+        at = EBML_write_float_value(WEBM_SAMPLING_FREQUENCY, this.sampling_frequency, dv, at);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+            WEBM_SAMPLING_FREQUENCY.length + 1 + 4 +
+            WEBM_CHANNELS.length + 1 + 1;
+    },
+}
+
+function webm_Video(width, height)
+{
+    this.id = WEBM_VIDEO;
+    this.flag_interlaced = 0;
+    this.width = width;
+    this.height = height;
+}
+
+webm_Video.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_INTERLACED, this.flag_interlaced, dv, at);
+        at = EBML_write_u16_value(WEBM_PIXEL_WIDTH, this.width, dv, at)
+        at = EBML_write_u16_value(WEBM_PIXEL_HEIGHT, this.height, dv, at)
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+            WEBM_FLAG_INTERLACED.length + 1 + 1 +
+            WEBM_PIXEL_WIDTH.length + 1 + 2 +
+            WEBM_PIXEL_HEIGHT.length + 1 + 2;
+    },
+}
+
+
+
+/* ---------------------------
+   SeekHead not currently used.  Hopefully not needed.
+*/
+function webm_Seek(seekid, pos)
+{
+    this.id = WEBM_SEEK;
+    this.pos = pos;
+    this.seekid = seekid;
+}
+
+webm_Seek.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u1_data_len(this.buffer_size() - 1 - this.id.length, dv, at);
+
+        at = EBML_write_data(WEBM_SEEK_ID, this.seekid, dv, at)
+        at = EBML_write_u16_value(WEBM_SEEK_POSITION, this.pos, dv, at)
+
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 1 +
+                WEBM_SEEK_ID.length + 1 + this.seekid.length +
+                WEBM_SEEK_POSITION.length + 1 + 2;
+    },
+}
+function webm_SeekHead(info_pos, track_pos)
+{
+    this.id = WEBM_SEEK_HEAD;
+    this.info = new webm_Seek(WEBM_SEGMENT_INFORMATION, info_pos);
+    this.track = new webm_Seek(WEBM_TRACKS, track_pos);
+}
+
+webm_SeekHead.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+
+        at = this.info.to_buffer(a, at);
+        at = this.track.to_buffer(a, at);
+
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+                this.info.buffer_size() +
+                this.track.buffer_size();
+    },
+}
+
+/* -------------------------------
+   End of Seek Head
+*/
+
+function webm_AudioTrackEntry()
+{
+    this.id = WEBM_TRACK_ENTRY;
+    this.number = 1;
+    this.uid = 2;  // Arbitrary id; most likely makes no difference
+    this.type = 2; // Audio
+    this.flag_enabled = 1;
+    this.flag_default = 1;
+    this.flag_forced = 1;
+    this.flag_lacing = 0;
+    this.min_cache = 0; // fixme - check
+    this.max_block_addition_id = 0;
+    this.codec_decode_all = 0; // fixme - check
+    this.seek_pre_roll = 0; // 80000000; // fixme - check
+    this.codec_delay =   80000000; // Must match codec_private.preskip
+    this.codec_id = "A_OPUS";
+    this.audio = new webm_Audio(Constants.OPUS_FREQUENCY);
+
+    // See:  http://tools.ietf.org/html/draft-terriberry-oggopus-01
+    this.codec_private = [ 0x4f, 0x70, 0x75, 0x73, 0x48, 0x65, 0x61, 0x64,  // OpusHead
+                           0x01, // Version
+                           Constants.OPUS_CHANNELS,
+                           0x00, 0x0F, // Preskip - 3840 samples - should be 8ms at 48kHz
+                           0x80, 0xbb, 0x00, 0x00,  // 48000
+                           0x00, 0x00, // Output gain
+                           0x00  // Channel mapping family
+                           ];
+}
+
+webm_AudioTrackEntry.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+        at = EBML_write_u8_value(WEBM_TRACK_NUMBER, this.number, dv, at);
+        at = EBML_write_u8_value(WEBM_TRACK_UID, this.uid, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_ENABLED, this.flag_enabled, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_DEFAULT, this.flag_default, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_FORCED, this.flag_forced, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_LACING, this.flag_lacing, dv, at);
+        at = EBML_write_data(WEBM_CODEC_ID, this.codec_id, dv, at);
+        at = EBML_write_u8_value(WEBM_MIN_CACHE, this.min_cache, dv, at);
+        at = EBML_write_u8_value(WEBM_MAX_BLOCK_ADDITION_ID, this.max_block_addition_id, dv, at);
+        at = EBML_write_u8_value(WEBM_CODEC_DECODE_ALL, this.codec_decode_all, dv, at);
+        at = EBML_write_u32_value(WEBM_CODEC_DELAY, this.codec_delay, dv, at);
+        at = EBML_write_u32_value(WEBM_SEEK_PRE_ROLL, this.seek_pre_roll, dv, at);
+        at = EBML_write_u8_value(WEBM_TRACK_TYPE, this.type, dv, at);
+        at = EBML_write_data(WEBM_CODEC_PRIVATE, this.codec_private, dv, at);
+
+        at = this.audio.to_buffer(a, at);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+            WEBM_TRACK_NUMBER.length + 1 + 1 +
+            WEBM_TRACK_UID.length + 1 + 1 +
+            WEBM_TRACK_TYPE.length + 1 + 1 +
+            WEBM_FLAG_ENABLED.length + 1 + 1 +
+            WEBM_FLAG_DEFAULT.length + 1 + 1 +
+            WEBM_FLAG_FORCED.length + 1 + 1 +
+            WEBM_FLAG_LACING.length + 1 + 1 +
+            WEBM_MIN_CACHE.length + 1 + 1 +
+            WEBM_MAX_BLOCK_ADDITION_ID.length + 1 + 1 +
+            WEBM_CODEC_DECODE_ALL.length + 1 + 1 +
+            WEBM_SEEK_PRE_ROLL.length + 1 + 4 +
+            WEBM_CODEC_DELAY.length + 1 + 4 +
+            WEBM_CODEC_ID.length + this.codec_id.length + 1 +
+            WEBM_CODEC_PRIVATE.length + 1 + this.codec_private.length +
+            this.audio.buffer_size();
+    },
+}
+
+function webm_VideoTrackEntry(width, height)
+{
+    /*
+    ** In general, we follow specifications found by looking here:
+    **   https://www.webmproject.org/docs/container/
+    ** which points here:
+    **   https://www.matroska.org/technical/specs/index.html
+    ** and here:
+    **   https://datatracker.ietf.org/doc/draft-ietf-cellar-matroska/
+    ** Our goal is to supply mandatory values, and note where we differ
+    ** from the default.
+    */
+    this.id = WEBM_TRACK_ENTRY;
+    this.number = 1;
+    this.uid = 1;
+    this.type = 1; // Video
+    this.flag_enabled = 1;
+    this.flag_default = 1;
+    this.flag_forced = 1;  // Different than default; we wish to force
+    this.flag_lacing = 1;
+    this.min_cache = 0;
+    this.max_block_addition_id = 0;
+    this.codec_id = "V_VP8";
+    this.codec_decode_all = 1;
+    this.seek_pre_roll = 0;
+
+    this.video = new webm_Video(width, height);
+}
+
+webm_VideoTrackEntry.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+        at = EBML_write_u8_value(WEBM_TRACK_NUMBER, this.number, dv, at);
+        at = EBML_write_u8_value(WEBM_TRACK_UID, this.uid, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_ENABLED, this.flag_enabled, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_DEFAULT, this.flag_default, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_FORCED, this.flag_forced, dv, at);
+        at = EBML_write_u8_value(WEBM_FLAG_LACING, this.flag_lacing, dv, at);
+        at = EBML_write_data(WEBM_CODEC_ID, this.codec_id, dv, at);
+        at = EBML_write_u8_value(WEBM_MIN_CACHE, this.min_cache, dv, at);
+        at = EBML_write_u8_value(WEBM_MAX_BLOCK_ADDITION_ID, this.max_block_addition_id, dv, at);
+        at = EBML_write_u8_value(WEBM_CODEC_DECODE_ALL, this.codec_decode_all, dv, at);
+        at = EBML_write_u32_value(WEBM_SEEK_PRE_ROLL, this.seek_pre_roll, dv, at);
+        at = EBML_write_u8_value(WEBM_TRACK_TYPE, this.type, dv, at);
+        at = this.video.to_buffer(a, at);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+            WEBM_TRACK_NUMBER.length + 1 + 1 +
+            WEBM_TRACK_UID.length + 1 + 1 +
+            WEBM_FLAG_ENABLED.length + 1 + 1 +
+            WEBM_FLAG_DEFAULT.length + 1 + 1 +
+            WEBM_FLAG_FORCED.length + 1 + 1 +
+            WEBM_FLAG_LACING.length + 1 + 1 +
+            WEBM_CODEC_ID.length + this.codec_id.length + 1 +
+            WEBM_MIN_CACHE.length + 1 + 1 +
+            WEBM_MAX_BLOCK_ADDITION_ID.length + 1 + 1 +
+            WEBM_CODEC_DECODE_ALL.length + 1 + 1 +
+            WEBM_SEEK_PRE_ROLL.length + 1 + 4 +
+            WEBM_TRACK_TYPE.length + 1 + 1 +
+            this.video.buffer_size();
+    },
+}
+
+function webm_Tracks(entry)
+{
+    this.id = WEBM_TRACKS;
+    this.track_entry = entry;
+}
+
+webm_Tracks.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.buffer_size() - 8 - this.id.length, dv, at);
+        at = this.track_entry.to_buffer(a, at);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+                 this.track_entry.buffer_size();
+    },
+}
+
+function webm_Cluster(timecode, data)
+{
+    this.id = WEBM_CLUSTER;
+    this.timecode = timecode;
+    this.data = data;
+}
+
+webm_Cluster.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        dv.setUint8(at++, 0xff);
+        at = EBML_write_u32_value(WEBM_TIME_CODE, this.timecode, dv, at);
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 1 +
+                 WEBM_TIME_CODE.length + 1 + 4;
+    },
+}
+
+function webm_SimpleBlock(timecode, data, keyframe)
+{
+    this.id = WEBM_SIMPLE_BLOCK;
+    this.timecode = timecode;
+    this.data = data;
+    this.keyframe = keyframe;
+}
+
+webm_SimpleBlock.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        var dv = new DataView(a);
+        at = EBML_write_array(this.id, dv, at);
+        at = EBML_write_u64_data_len(this.data.byteLength + 4, dv, at);
+        at = EBML_write_u1_data_len(1, dv, at); // Track #
+        dv.setUint16(at, this.timecode); at += 2; // timecode - relative to cluster
+        dv.setUint8(at, this.keyframe ? Constants.CLUSTER_SIMPLEBLOCK_FLAG_KEYFRAME : 0); at += 1;  // flags
+
+        // FIXME - There should be a better way to copy
+        var u8 = new Uint8Array(this.data);
+        for (var i = 0; i < this.data.byteLength; i++)
+            dv.setUint8(at++, u8[i]);
+
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.id.length + 8 +
+                 1 + 2 + 1 +
+                 this.data.byteLength;
+    },
+}
+
+function webm_Header()
+{
+    this.ebml = new EBMLHeader;
+    this.segment = new webm_Segment;
+    this.seek_head = new webm_SeekHead(0, 0);
+
+    this.seek_head.info.pos = this.segment.buffer_size() + this.seek_head.buffer_size();
+
+    this.info = new webm_SegmentInformation;
+
+    this.seek_head.track.pos = this.seek_head.info.pos + this.info.buffer_size();
+}
+
+webm_Header.prototype =
+{
+    to_buffer: function(a, at)
+    {
+        at = at || 0;
+        at = this.ebml.to_buffer(a, at);
+        at = this.segment.to_buffer(a, at);
+        at = this.info.to_buffer(a, at);
+
+        return at;
+    },
+    buffer_size: function()
+    {
+        return this.ebml.buffer_size() +
+               this.segment.buffer_size() +
+               this.info.buffer_size();
+    },
+}
+
+export {
+  Constants,
+  webm_Audio as Audio,
+  webm_Video as Video,
+  webm_AudioTrackEntry as AudioTrackEntry,
+  webm_VideoTrackEntry as VideoTrackEntry,
+  webm_Tracks as Tracks,
+  webm_Cluster as Cluster,
+  webm_SimpleBlock as SimpleBlock,
+  webm_Header as Header,
+};
@@ -0,0 +1,140 @@
+"use strict";
+/*
+   Copyright (C) 2012 by Jeremy P. White <jwhite@codeweavers.com>
+
+   This file is part of spice-html5.
+
+   spice-html5 is free software: you can redistribute it and/or modify
+   it under the terms of the GNU Lesser General Public License as published by
+   the Free Software Foundation, either version 3 of the License, or
+   (at your option) any later version.
+
+   spice-html5 is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public License
+   along with spice-html5.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*--------------------------------------------------------------------------------------
+**  SpiceWireReader
+**      This class will receive messages from a WebSocket and relay it to a given
+**  callback.  It will optionally save and pass along a header, useful in processing
+**  the mini message format.
+**--------------------------------------------------------------------------------------*/
+
+import { DEBUG } from './utils.js';
+import { combine_array_buffers } from './utils.js';
+
+function SpiceWireReader(sc, callback)
+{
+    this.sc = sc;
+    this.callback = callback;
+    this.needed = 0;
+    this.size = 0;
+
+    this.buffers = [];
+
+    this.sc.ws.wire_reader = this;
+    this.sc.ws.binaryType = "arraybuffer";
+    this.sc.ws.addEventListener('message', wire_blob_catcher);
+}
+
+SpiceWireReader.prototype =
+{
+
+    /*------------------------------------------------------------------------
+    **  Process messages coming in from our WebSocket
+    **----------------------------------------------------------------------*/
+    inbound: function (mb)
+    {
+        /* Just buffer if we don't need anything yet */
+        if (this.needed == 0)
+        {
+            this.buffers.push(mb);
+            this.size += mb.byteLength;
+            return;
+        }
+
+        /* Optimization - if we have just one inbound block, and it's
+            suitable for our needs, just use it.  */
+        if (this.buffers.length == 0 && mb.byteLength >= this.needed)
+        {
+            if (mb.byteLength > this.needed)
+            {
+                this.size = mb.byteLength - this.needed;
+                this.buffers.push(mb.slice(this.needed));
+                mb = mb.slice(0, this.needed);
+            }
+            this.callback.call(this.sc, mb,
+                        this.saved_msg_header || undefined);
+        }
+        else
+        {
+            this.buffers.push(mb);
+            this.size += mb.byteLength;
+        }
+
+
+        /* Optimization - All it takes is one combine  */
+        while (this.size >= this.needed) {
+            var count = 0;
+            var frame = new ArrayBuffer(this.needed);
+            var view = new Uint8Array(frame);
+
+            while (count < frame.byteLength && this.buffers.length > 0) {
+                var buf = this.buffers.shift();
+                if (!buf) {
+                    return;
+                }
+                var uint8 = new Uint8Array(buf);
+                var step = frame.byteLength - count;
+
+                /* Optimization - use dataview.set() instead of combine_array_buffers() */
+                if (uint8.length <= step) {
+                    view.set(uint8, count);
+                    count += uint8.length;
+                    this.size -= uint8.length;
+                } else {
+                    var temp = uint8.slice(0, step);
+                    view.set(temp, count);
+                    count += temp.length;
+                    this.size -= temp.length;
+            
+                    this.buffers.unshift(uint8.slice(step));
+                }
+            }
+
+            this.callback.call(this.sc, frame, this.saved_msg_header || undefined);
+        }
+
+    },
+
+    request: function(n)
+    {
+        this.needed = n;
+    },
+
+    save_header: function(h)
+    {
+        this.saved_msg_header = h;
+    },
+
+    clear_header: function()
+    {
+        this.saved_msg_header = undefined;
+    },
+}
+
+function wire_blob_catcher(e)
+{
+    DEBUG > 1 && console.log(">> WebSockets.onmessage");
+    DEBUG > 1 && console.log("id " + this.wire_reader.sc.connection_id +"; type " + this.wire_reader.sc.type);
+    SpiceWireReader.prototype.inbound.call(this.wire_reader, e.data);
+}
+
+export {
+  SpiceWireReader,
+};
Author	SHA1	Message	Date
Mitchell-JohnsonandClaude Fable 5.1	a2674bea6a	thumbs: a GPU-access run already in flight refuses a second (409) The sweep's battery hit the route three times; the second and third runs only collided with the first's restart timer. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-13 18:00:39 -07:00
Mitchell-JohnsonandClaude Fable 5.1	134bbc991e	PLAN.md: the whole-console sweep Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-13 17:56:16 -07:00
Mitchell-JohnsonandClaude Fable 5.1	285278abdb	A sweep of the whole console: status codes, a data race, atomic writes, dead code From the race detector, staticcheck, a garbage-in battery over every safe route and a headless pass through every tab on two machines. Fixed: - docker inspect/health of a container that isn't there answered 500; now 404, and a daemon that is down 503 (dockerErr, with a test). - /api/virt/instances/{name} on a machine without Incus answered 502 "incus not found"; it now says Incus isn't ready, like its siblings. - Deleting a ZFS snapshot with a bad name answered 500; a bad name is 400, a snapshot that doesn't exist 404. - The task list read a task's Running flag without the task's lock while the waiter goroutine cleared it: a data race, now read under the lock. - The Virtualization export config and run record were written in place; a crash mid-write would have left a half file. Atomic now, like the config and state files. - An unused function in kvm.go, one in incus/subnet.go, an unused field in files/move.go and a capitalised error string, from staticcheck. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-13 17:52:18 -07:00
Mitchell-JohnsonandClaude Fable 5.1	05161bf7ef	PLAN.md: the Files edge sweep Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 20:32:34 -07:00
Mitchell-JohnsonandClaude Fable 5.1	1038c010fa	Files: a sweep of the edges Found by walking every handler and the UI with odd inputs, then a battery of requests against the live hub. Fixed: - A save over the 8 MiB cap was cut short in place: the file was truncated, then the first 8 MiB written, and the caller told 204. Now the body is read whole first and a body over the cap is a 413 with the file untouched. - A link to a file showed the link's own time; now the file's, so the row reads right and the preview key follows the file. - Reading a link to nothing answered 200 with an empty body (the open failed after the headers in root mode); now a 404 that names the target. - A play request with an unknown codec or size was answered by inspecting the file first, so an audio-only file said "no video stream" instead of what was wrong; the choice is checked before any work, and is a 400. - A stream that ended in failure was handed back to the next identical request for ten minutes; a failed one is now dropped and a fresh one made. - A player that left while its stream was still finding a first segment made the loop try the next recipe; it stops. A stream closed mid-start is not started again. - Ending a root-mode ffmpeg could wait forever: the daemon cannot signal root's processes, so the wait is bounded and the helper's own grace does the rest. - A page going away (a phone closing the tab) releases its stream by a beacon, rather than ten minutes later by the sweeper. - The path box resolves like a shell — relative to the folder shown, . and .. applied, trailing slashes dropped — in the tab and in the Move picker, with a test. A typed path that is a file opens it; a remembered folder that is gone falls back to / once. - A dropped folder arrived as a nameless empty file; it is refused with a word. The upload toast counts what was actually uploaded. - The viewer names a device, pipe or socket, and a dangling link, instead of calling them binary files. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 20:31:10 -07:00
Mitchell-JohnsonandClaude Fable 5.1	d200e5dc2e	PLAN.md: re-encoding for the browser, on the machine's GPU Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 17:46:35 -07:00
Mitchell-JohnsonandClaude Fable 5.1	f3c547adfa	Files: re-encode a video the browser can't play, on the machine's own GPU, and play that The viewer tries the file as it is first. When the browser gives up — Safari and an MKV, HEVC without a hardware decoder — or on a tap, a picker: codec (H.264, HEVC, AV1, or the original codec repackaged) and size (original, 1080p, 720p, 480p), each codec labelled with the engine this machine would use. POST /api/files/play runs ffmpeg into an HLS event playlist of fragmented-MP4 segments under <data dir>/transcode/<id>/; Safari plays HLS itself and everything else goes through hls.js, loaded only then. The recipes are tried best first: a card on the bus before the integrated GPU, decoding on the same card before decoding on the CPU and uploading, the software encoders last; a recipe that produces no first segment is dropped for the next. The seekable range grows as ffmpeg gets ahead; status says how far. Streams are reused for the same request, closed when the player goes, swept after ten idle minutes, and the folder is emptied at start. Root mode runs ffmpeg as root through a helper that ends when the daemon lets go of it. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 17:42:25 -07:00
Mitchell-JohnsonandClaude Fable 5.1	aa4ae57c22	gofmt after the rename Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:54:52 -07:00
Mitchell-JohnsonandClaude Fable 5.1	af189b1fa1	internal/thumbs is internal/media, with Inspect: what a file holds, from ffprobe The package was named for its first job; it now also decides what a file is for the Files tab (image, video, audio) and reads its streams, which the viewer will need. Inspect is the richer probe — codec, profile, pixel format, size, frame rate, HDR transfer, the audio beside it, container and duration — run as root through sudo when asked. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:54:15 -07:00
Mitchell-JohnsonandClaude Fable 5.1	beec9269fe	PLAN.md: video and audio playback in the Files viewer, as the file is Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:43:03 -07:00
Mitchell-JohnsonandClaude Fable 5.1	d7f56ee0b3	Files: a seek costs nothing; the backend reopens only when a read wants somewhere else ServeContent seeks to the end for the size before it seeks to the range, which was throwing away the stream Check had just opened. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:41:54 -07:00
Mitchell-JohnsonandClaude Fable 5.1	a9bcb88212	Files: play video and audio in the viewer, as the file is; reads answer Range requests The viewer hands a video or audio file to the browser untouched — container, codec and all — and the browser plays what it can; when it can't, the viewer says so and offers the download. What the server adds is the part a player needs: /api/files/read now goes through http.ServeContent for a real file of known size, so Range requests (seeking) and HEAD work, and a download can resume. The root backend's helper takes an offset for that, and a Seeker opens the backend once, at the range asked for, instead of streaming from the top. Audio files are a preview kind too: their cover art is the thumbnail. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:40:42 -07:00
Mitchell-JohnsonandClaude Fable 5.1	c24f6f5cde	Files: a move of something that isn't there is a 404, not a task that fails on arrival The kernel answers EXDEV for two paths on different filesystems before it looks for the source, so the cross-filesystem path was taken for a missing file. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:30:04 -07:00
Mitchell-JohnsonandClaude Fable 5.1	b6d72cce9f	PLAN.md: Move… is a folder picker; moves across filesystems copy then remove Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:29:27 -07:00
Mitchell-JohnsonandClaude Fable 5.1	fb3b8e4b4c	Files: Move… opens a folder picker, and a move across filesystems copies then removes The picker walks the machine like the tab does — back, forward, up, breadcrumbs, a path box, a new folder — and "Move here" puts the file or folder in the folder being looked at; it says why it can't when it can't (already here, into itself, a name clash). POST /api/files/move is a rename when the two ends share a filesystem and otherwise a task: on a NAS every move between datasets is a different filesystem, and a rename there is EXDEV. The copy is built under a hidden temporary name beside its destination, renamed into place once complete, and only then is the original removed, so a failure or a cancel leaves the original as it was. Modes, times, symlinks and, as root, owners are kept. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:27:55 -07:00
Mitchell-JohnsonandClaude Fable 5.1	e5d3fb2afd	PLAN.md: previews are cached in thumbs.db Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:05:17 -07:00
Mitchell-JohnsonandClaude Fable 5.1	e198471f8c	Files previews: the cache is one database file, <data dir>/thumbs.db bbolt instead of a tree of hash-named JPEGs: pure Go, so the binary stays static; one file per machine; an entry carries where the preview came from (engine, codec, size, when) beside the picture, and a count rides along so the tab can say what it holds without walking anything. A miss never creates the file, so a machine nobody browses with previews on never has one; a cache that cannot be opened is logged and previews are still made and served, just not kept. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 16:04:12 -07:00
Mitchell-JohnsonandClaude Fable 5.1	51c718e8e3	PLAN.md: previews on the Files tab, shipped as v0.1.0-200 Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 15:25:55 -07:00
Mitchell-JohnsonandClaude Fable 5.1	f8c9479e93	Files: previews — a toggle that shows a thumbnail per image and video, made by ffmpeg on the machine's GPU where it has one, cached under the data dir A previews button on the Files tab turns the icon column into a 256 px thumbnail for every image and video row, loaded as rows scroll near. internal/thumbs probes what the machine can do rather than assuming it: ffmpeg and ffprobe, every /dev/dri/renderD* opened and exercised, vainfo's decode profiles per node where it exists. A video goes to the first GPU that lists its codec, with ffmpeg's own software fallback behind it and a CPU retry behind that; images decode on the CPU, JPEGs at a reduced DCT size. Previews are kept under <data dir>/thumbs/ keyed by path, size and mtime, with undecodable files remembered too. Root mode makes them through the same root helper the file reads use. Where ffmpeg is missing the tab offers to install it; where a render node exists but is closed to the daemon's user, it offers a drop-in adding the group and a restart. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 15:20:27 -07:00
Mitchell-JohnsonandClaude Fable 5.1	e7034cd478	VIRTUALIZATION.md: grid's Incus removed for a fresh start; status Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 15:02:52 -07:00
Mitchell-JohnsonandClaude Opus 5.5	e068fbdb2f	PLAN.md: copyparty retired ahead of the Files gaps; they stay as Files polish Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-11 14:54:27 -07:00
Mitchell-JohnsonandClaude Fable 5.1	faf444d8ce	VIRTUALIZATION.md: storage decision revised — a Disk location picker, plain files on grid's root disk Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 14:36:06 -07:00
Mitchell-JohnsonandClaude Fable 5.1	ae72e45bf5	Virtualization: a disk-location picker on both create forms, locations by place, add or remove a location Pools are shown by where their bytes land (plain files on this disk, a ZFS pool inside one file, a dataset…) rather than by driver name, which read as the NAS pool. A location can be added as a plain-files pool at any folder on the machine, and removed while nothing uses it. The driver order at Install is as it was; the labels say what each one really is. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-11 14:33:10 -07:00
Mitchell-JohnsonandClaude Opus 5.5	a9b4d7969e	PLAN.md: CPU power on the Processes tab, shipped as v0.1.0-194 Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-11 00:00:05 -07:00
Mitchell-JohnsonandClaude Opus 5.5	bfedf622be	Processes: CPU power beside the clock, from the packages' energy counters New sensor cpu.power: watts from the RAPL energy counters (Intel, and AMD Zen through the same driver), summed over every package and averaged into history. Parts of a package, psys and the MMIO duplicate are left out. The counters are root-only, so a daemon that isn't root reads them through `hamlab cpu-energy`, a root helper started once with sudo or doas and asked over a pipe each sample, the same shape as the GPU client walk's helper. It reads only the counters it finds itself. No counters or no root means no reading, and the CPU box shows nothing extra. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-10 23:58:35 -07:00
Mitchell-JohnsonandClaude Opus 5.5	d5680e8e41	VGA console: stop importing spice-html5's demo stylesheet, which restyled every button spice.css sets body, *, button and canvas for the whole document. Bundled into the App chunk since `43ebacd` (deployed as v0.1.0-188), it turned every button into a gradient pill, shifted 15% right and 8% up with a 150px minimum width, broke the rail and header layout, and bordered every graph canvas. The console is already styled by the .vga rules in styles.css. The file is removed from the vendored copy, and a new web test fails on any stylesheet import outside an allow-list. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-10 15:19:20 -07:00
Mitchell-JohnsonandClaude Opus 5.5	ea84ee40c7	PLAN.md: the 2375 item deployed as v0.1.0-191 and checked on every machine Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-10 15:00:19 -07:00
Mitchell-JohnsonandClaude Opus 5.5	24a9979432	Docker updates: a machine without Docker answers empty, not 500 The hub used to answer this for its nodes and hid the node's 500. Now the node answers itself, so it needs the same guard the stack list has. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-10 14:58:13 -07:00
Mitchell-JohnsonandClaude Opus 5.5	c27d9f0ada	Stacks: one machine, one set of files; default home is <data dir>/stacks The hub no longer probes a node's Docker on tcp :2375, holds compose files for a node, or runs compose against another machine's Docker. hubStacks, nodeDocker, taskOnHub and the hub-side /api/nodes/{node}/docker/... routes are gone; the generic node proxy hands those requests to the node's own Ham Lab. Stack.remote / held_by and compose.Spec.Remote are removed. New stacks default to <data dir>/stacks on every machine. Folders with two or more deployed stacks are still offered, after it, never as default. The ~/stacks fallback is gone. A missing home is skipped without a sudo find. A schedule saved earlier with a tcp target is refused with a message instead of being run against this machine's Docker. PORTABILITY.md 3.1, 3.2, 3.3 and 9.2 done; 3.5 checked, no change needed. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>	2026-10-10 14:53:10 -07:00
Mitchell-JohnsonandClaude Fable 5.1	a0ce3e5eb9	VIRTUALIZATION.md: phase 2 deployed as v0.1.0-188 and verified live; what is left Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-09 22:34:05 -07:00
Mitchell-JohnsonandClaude Fable 5.1	80a5b4b464	VGA console: one console operation per VM, a data websocket per SPICE channel spice-html5 opens a websocket per channel (main, display, inputs, cursor, playback), and each one was making Ham Lab open a new console operation, which Incus refuses as already connected. Now the first channel opens the operation and holds its control websocket; every further channel is one more data websocket on the same operation, which Incus allows; the operation is let go when the last channel closes. A stale operation from a previous Ham Lab process is taken over with force. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-09 22:32:08 -07:00
Mitchell-JohnsonandClaude Fable 5.1	a5ebfdc9ce	VGA console: agree to spice-html5's binary subprotocol; label layout and two labels in the detail pane Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-09 22:28:00 -07:00
Mitchell-JohnsonandClaude Fable 5.1	43ebacdd92	Virtualization phase 2: ISOs, New VM from ISO, the VGA console in the browser, nightly exports, mounts, instance sensors - Library: an ISO shelf in virt/isos: upload (the Files uploader), fetch by URL with an optional sha256, import a file from the machine by copying it in, rename, delete (refused while attached), attach to a VM as a CD-ROM live or stopped with boot-first, eject, and New VM from ISO: an empty VM with the ISO as first boot device, Secure Boot on or off. - The VGA console: Ham Lab asks Incus for the VM's SPICE console over its unix socket and bridges the display websocket to the browser, where spice-html5 (vendored from upstream b372aab, LGPL, loaded on demand) draws it; Ctrl+Alt+Del, fit-to-window. - Exports: every instance as a tarball in virt/exports/<name>/, kept to a count, as a cron line in /etc/cron.d/hamlab-virt calling hamlab virt-export, settings and the last run as files beside the data; Export now per instance or for all. - Disks tab per instance: the root disk, attached ISOs with Eject, bind mounts in and out (shift for containers, virtiofs for VMs). - instance.* sensors (running, down, state, cpu, mem) and the VM-or-container-down alert default, offered once to installs seeded before it existed. - cloud-init: Use my SSH keys writes a cloud-config from the account's public keys. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-09 22:21:57 -07:00
Mitchell-JohnsonandClaude Fable 5.1	66498a58c5	VIRTUALIZATION.md: phase 1 deployed as v0.1.0-184, Install verified live on grid Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-09 15:31:06 -07:00
Mitchell-JohnsonandClaude Fable 5.1	b790b0c31c	virt: the description is an instance field, not a config key — set it with a PATCH Found on the first live test on grid: incus config set refused 'description' and the whole limits save with it. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com>	2026-10-09 15:30:10 -07:00