diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..23d18e7 --- /dev/null +++ b/.gitignore @@ -0,0 +1,4 @@ +bin/ +internal/web/dist/ +web/node_modules/ +web/dist/ diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..1f19e1b --- /dev/null +++ b/Makefile @@ -0,0 +1,26 @@ +VERSION ?= $(shell git describe --tags --always --dirty 2>/dev/null || echo dev) +GO ?= go +PREFIX ?= /usr/local/bin + +.PHONY: all web build dev deploy clean + +all: build + +web: + cd web && npm ci --no-audit --no-fund && npm run build + +build: web + $(GO) build -trimpath -ldflags "-s -w -X main.version=$(VERSION)" -o bin/hamlet ./cmd/hamlet + +# backend only (assumes web/dist already built) +go: + $(GO) build -ldflags "-X main.version=$(VERSION)" -o bin/hamlet ./cmd/hamlet + +dev: + cd web && npm run dev + +deploy: build + ./deploy/install.sh + +clean: + rm -rf bin internal/web/dist web/dist diff --git a/cmd/hamlet/main.go b/cmd/hamlet/main.go new file mode 100644 index 0000000..e6359d1 --- /dev/null +++ b/cmd/hamlet/main.go @@ -0,0 +1,160 @@ +// Hamlet — Proxmox-style web console for a bare-metal Debian host. +package main + +import ( + "context" + "errors" + "flag" + "fmt" + "log" + "net/http" + "os" + "os/signal" + "os/user" + "path/filepath" + "syscall" + "time" + + "golang.org/x/term" + + "hamlet/internal/api" + "hamlet/internal/auth" + "hamlet/internal/config" + "hamlet/internal/store" + hterm "hamlet/internal/term" + "hamlet/internal/web" +) + +var version = "dev" + +func main() { + defaultCfg := os.Getenv("HAMLET_CONFIG") + if defaultCfg == "" { + home, _ := os.UserHomeDir() + defaultCfg = filepath.Join(home, "apps", "hamlet", "config.json") + } + cfgPath := flag.String("config", defaultCfg, "path to config.json") + flag.Usage = func() { + fmt.Fprintf(os.Stderr, "usage: hamlet [-config path] [serve|passwd|version]\n") + flag.PrintDefaults() + } + flag.Parse() + + cmd := "serve" + if flag.NArg() > 0 { + cmd = flag.Arg(0) + } + cfg, err := config.Load(*cfgPath) + if err != nil { + log.Fatal(err) + } + switch cmd { + case "version": + fmt.Println("hamlet", version) + case "passwd": + if err := passwd(cfg); err != nil { + log.Fatal(err) + } + case "serve": + if err := serve(cfg); err != nil { + log.Fatal(err) + } + default: + flag.Usage() + os.Exit(2) + } +} + +func passwd(cfg *config.Config) error { + fmt.Fprint(os.Stderr, "New password: ") + p1, err := term.ReadPassword(int(os.Stdin.Fd())) + fmt.Fprintln(os.Stderr) + if err != nil { + return err + } + fmt.Fprint(os.Stderr, "Again: ") + p2, err := term.ReadPassword(int(os.Stdin.Fd())) + fmt.Fprintln(os.Stderr) + if err != nil { + return err + } + if string(p1) != string(p2) { + return errors.New("passwords do not match") + } + if len(p1) < 12 { + return errors.New("password must be at least 12 characters") + } + h, err := auth.HashPassword(string(p1)) + if err != nil { + return err + } + cfg.PasswordHash = h + if err := cfg.Save(); err != nil { + return err + } + fmt.Fprintln(os.Stderr, "password set in", cfg.Path()) + return nil +} + +func serve(cfg *config.Config) error { + if cfg.PasswordHash == "" { + return fmt.Errorf("no password set — run: hamlet -config %s passwd", cfg.Path()) + } + if err := os.MkdirAll(cfg.DataDir(), 0o700); err != nil { + return err + } + st, err := store.Open(filepath.Join(cfg.DataDir(), "state.json")) + if err != nil { + return err + } + sessions := auth.NewSessions(st) + + u, err := user.Current() + if err != nil { + return err + } + shell := os.Getenv("SHELL") + if shell == "" { + shell = "/bin/bash" + } + mgr := hterm.NewManager(shell, u.HomeDir) + mgr.OnChange = func(list []hterm.Info) { + _ = st.Update(func(s *store.State) { + s.Terminals = s.Terminals[:0] + for _, t := range list { + s.Terminals = append(s.Terminals, store.Terminal{ID: t.ID, Name: t.Name}) + } + }) + } + // Re-open the shells that existed before the last restart (fresh processes, + // same names/order) so the sidebar comes back as it was. + var saved []store.Terminal + st.View(func(s *store.State) { saved = append(saved, s.Terminals...) }) + for _, t := range saved { + if _, err := mgr.Create(t.ID, t.Name); err != nil { + log.Printf("restore terminal %q: %v", t.Name, err) + } + } + + srv := api.New(cfg, sessions, mgr, web.FS(), version) + hs := &http.Server{ + Addr: cfg.Listen, + Handler: srv.Handler(), + ReadHeaderTimeout: 10 * time.Second, + } + go func() { + sig := make(chan os.Signal, 1) + signal.Notify(sig, syscall.SIGINT, syscall.SIGTERM) + <-sig + log.Print("shutting down") + ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second) + defer cancel() + _ = hs.Shutdown(ctx) + mgr.Shutdown() + }() + log.Printf("hamlet %s listening on %s as %s (shell %s)", version, cfg.Listen, u.Username, shell) + if err := hs.ListenAndServe(); !errors.Is(err, http.ErrServerClosed) { + return err + } + return nil +} diff --git a/deploy/hamlet.service b/deploy/hamlet.service new file mode 100644 index 0000000..069cfff --- /dev/null +++ b/deploy/hamlet.service @@ -0,0 +1,18 @@ +[Unit] +Description=Hamlet web console +After=network.target + +[Service] +Type=simple +User=core +Group=core +WorkingDirectory=/home/core +Environment=HAMLET_CONFIG=/home/core/apps/hamlet/config.json +ExecStart=/usr/local/bin/hamlet serve +Restart=always +RestartSec=3 +KillMode=control-group +TimeoutStopSec=10 + +[Install] +WantedBy=multi-user.target diff --git a/deploy/install.sh b/deploy/install.sh new file mode 100755 index 0000000..575edb8 --- /dev/null +++ b/deploy/install.sh @@ -0,0 +1,11 @@ +#!/bin/sh +# Install the built binary and unit on this host, then (re)start the service. +set -eu +cd "$(dirname "$0")/.." +sudo install -m 0755 bin/hamlet /usr/local/bin/hamlet +sudo install -m 0644 deploy/hamlet.service /etc/systemd/system/hamlet.service +sudo systemctl daemon-reload +sudo systemctl enable --now hamlet.service >/dev/null +sudo systemctl restart hamlet.service +sleep 1 +systemctl is-active hamlet.service && /usr/local/bin/hamlet version diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..26fb4e9 --- /dev/null +++ b/go.mod @@ -0,0 +1,12 @@ +module hamlet + +go 1.26.0 + +require ( + github.com/coder/websocket v1.8.15 + github.com/creack/pty v1.1.24 + golang.org/x/crypto v0.57.0 + golang.org/x/term v0.46.0 +) + +require golang.org/x/sys v0.48.0 // indirect diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..f1c4538 --- /dev/null +++ b/go.sum @@ -0,0 +1,10 @@ +github.com/coder/websocket v1.8.15 h1:6B2JPeOGlpff2Uz6vOEH1Vzpi0iUz20A+lPVhPHtNUA= +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= +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/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= diff --git a/internal/api/server.go b/internal/api/server.go new file mode 100644 index 0000000..cd21fa6 --- /dev/null +++ b/internal/api/server.go @@ -0,0 +1,326 @@ +// Package api is the HTTP/WebSocket surface: auth, terminal CRUD, attach, static UI. +package api + +import ( + "context" + "encoding/json" + "errors" + "io" + "io/fs" + "log" + "net/http" + "os" + "strings" + "time" + + "github.com/coder/websocket" + + "hamlet/internal/auth" + "hamlet/internal/config" + "hamlet/internal/term" +) + +const cookieName = "hamlet_session" + +type Server struct { + cfg *config.Config + sessions *auth.Sessions + limiter auth.Limiter + mgr *term.Manager + version string + started time.Time + user string + host string + ui fs.FS + mux *http.ServeMux +} + +func New(cfg *config.Config, sessions *auth.Sessions, mgr *term.Manager, ui fs.FS, version string) *Server { + host, _ := os.Hostname() + s := &Server{cfg: cfg, sessions: sessions, mgr: mgr, ui: ui, version: version, + started: time.Now(), host: host, user: os.Getenv("USER")} + if s.user == "" { + s.user = "core" + } + m := http.NewServeMux() + m.HandleFunc("GET /healthz", func(w http.ResponseWriter, _ *http.Request) { w.WriteHeader(204) }) + m.HandleFunc("POST /api/login", s.login) + m.HandleFunc("POST /api/logout", s.auth(s.logout)) + m.HandleFunc("GET /api/me", s.auth(s.me)) + m.HandleFunc("GET /api/terminals", s.auth(s.listTerminals)) + m.HandleFunc("POST /api/terminals", s.auth(s.createTerminal)) + m.HandleFunc("PATCH /api/terminals/{id}", s.auth(s.renameTerminal)) + m.HandleFunc("DELETE /api/terminals/{id}", s.auth(s.deleteTerminal)) + m.HandleFunc("GET /api/terminals/{id}/attach", s.auth(s.attach)) + m.HandleFunc("/api/", func(w http.ResponseWriter, _ *http.Request) { jsonErr(w, 404, "not found") }) + m.HandleFunc("/", s.static) + s.mux = m + return s +} + +func (s *Server) Handler() http.Handler { return s.mux } + +// ---- helpers ---- + +func jsonOK(w http.ResponseWriter, code int, v any) { + w.Header().Set("Content-Type", "application/json") + w.WriteHeader(code) + _ = json.NewEncoder(w).Encode(v) +} + +func jsonErr(w http.ResponseWriter, code int, msg string) { + jsonOK(w, code, map[string]string{"error": msg}) +} + +func secure(r *http.Request) bool { + return r.TLS != nil || strings.EqualFold(r.Header.Get("X-Forwarded-Proto"), "https") +} + +func (s *Server) setCookie(w http.ResponseWriter, r *http.Request, tok string, maxAge int) { + http.SetCookie(w, &http.Cookie{ + Name: cookieName, Value: tok, Path: "/", MaxAge: maxAge, + HttpOnly: true, Secure: secure(r), SameSite: http.SameSiteStrictMode, + }) +} + +func (s *Server) auth(next http.HandlerFunc) http.HandlerFunc { + return func(w http.ResponseWriter, r *http.Request) { + c, err := r.Cookie(cookieName) + if err != nil || !s.sessions.Valid(c.Value) { + jsonErr(w, 401, "unauthenticated") + return + } + next(w, r) + } +} + +// ---- auth ---- + +func (s *Server) login(w http.ResponseWriter, r *http.Request) { + if err := s.limiter.Allow(); err != nil { + jsonErr(w, 429, "too many attempts, try again later") + return + } + var body struct { + Password string `json:"password"` + } + if err := json.NewDecoder(io.LimitReader(r.Body, 4096)).Decode(&body); err != nil { + jsonErr(w, 400, "bad request") + return + } + if !auth.VerifyPassword(s.cfg.PasswordHash, body.Password) { + s.limiter.Fail() + log.Printf("login failed from %s", clientIP(r)) + jsonErr(w, 401, "wrong password") + return + } + s.limiter.Reset() + tok, err := s.sessions.Create() + if err != nil { + jsonErr(w, 500, "session error") + return + } + s.setCookie(w, r, tok, int(auth.SessionTTL.Seconds())) + log.Printf("login ok from %s", clientIP(r)) + w.WriteHeader(204) +} + +func (s *Server) logout(w http.ResponseWriter, r *http.Request) { + if c, err := r.Cookie(cookieName); err == nil { + s.sessions.Delete(c.Value) + } + s.setCookie(w, r, "", -1) + w.WriteHeader(204) +} + +func clientIP(r *http.Request) string { + if xff := r.Header.Get("X-Forwarded-For"); xff != "" { + return strings.TrimSpace(strings.Split(xff, ",")[0]) + " via " + r.RemoteAddr + } + return r.RemoteAddr +} + +// ---- me ---- + +func (s *Server) me(w http.ResponseWriter, _ *http.Request) { + load := "" + if b, err := os.ReadFile("/proc/loadavg"); err == nil { + f := strings.Fields(string(b)) + if len(f) >= 3 { + load = strings.Join(f[:3], " ") + } + } + uptime := 0.0 + if b, err := os.ReadFile("/proc/uptime"); err == nil { + if f := strings.Fields(string(b)); len(f) > 0 { + uptime, _ = json.Number(f[0]).Float64() + } + } + jsonOK(w, 200, map[string]any{ + "host": s.host, "user": s.user, "version": s.version, + "load": load, "uptime": uptime, "service_started": s.started, + }) +} + +// ---- terminals ---- + +func (s *Server) listTerminals(w http.ResponseWriter, _ *http.Request) { + jsonOK(w, 200, s.mgr.List()) +} + +func (s *Server) createTerminal(w http.ResponseWriter, r *http.Request) { + var body struct { + Name string `json:"name"` + } + _ = json.NewDecoder(io.LimitReader(r.Body, 4096)).Decode(&body) + name := strings.TrimSpace(body.Name) + if name == "" { + name = "shell " + time.Now().Format("15:04") + } + sess, err := s.mgr.Create("", name) + if err != nil { + log.Printf("create terminal: %v", err) + jsonErr(w, 500, err.Error()) + return + } + jsonOK(w, 201, map[string]string{"id": sess.ID, "name": sess.Name}) +} + +func (s *Server) renameTerminal(w http.ResponseWriter, r *http.Request) { + var body struct { + Name string `json:"name"` + } + if err := json.NewDecoder(io.LimitReader(r.Body, 4096)).Decode(&body); err != nil || strings.TrimSpace(body.Name) == "" { + jsonErr(w, 400, "name required") + return + } + if err := s.mgr.Rename(r.PathValue("id"), strings.TrimSpace(body.Name)); err != nil { + jsonErr(w, 404, err.Error()) + return + } + w.WriteHeader(204) +} + +func (s *Server) deleteTerminal(w http.ResponseWriter, r *http.Request) { + if err := s.mgr.Close(r.PathValue("id")); err != nil { + jsonErr(w, 404, err.Error()) + return + } + w.WriteHeader(204) +} + +type resizeMsg struct { + Type string `json:"type"` + Cols uint16 `json:"cols"` + Rows uint16 `json:"rows"` +} + +func (s *Server) attach(w http.ResponseWriter, r *http.Request) { + id := r.PathValue("id") + client, snapshot, running, err := s.mgr.Attach(id) + if err != nil { + jsonErr(w, 404, err.Error()) + return + } + // Origin must match Host (coder/websocket default) — blocks cross-site attaches. + conn, err := websocket.Accept(w, r, &websocket.AcceptOptions{CompressionMode: websocket.CompressionDisabled}) + if err != nil { + s.mgr.Detach(client) + return + } + defer s.mgr.Detach(client) + defer conn.Close(websocket.StatusNormalClosure, "") + conn.SetReadLimit(1 << 20) + + ctx, cancel := context.WithCancel(r.Context()) + defer cancel() + + if len(snapshot) > 0 { + if err := conn.Write(ctx, websocket.MessageBinary, snapshot); err != nil { + return + } + } + if !running { + _ = conn.Write(ctx, websocket.MessageText, []byte(`{"type":"exit"}`)) + } + + // writer: PTY → socket, plus keepalive pings so idle proxies don't cut us. + go func() { + defer cancel() + ping := time.NewTicker(25 * time.Second) + defer ping.Stop() + for { + select { + case <-ctx.Done(): + return + case <-ping.C: + pctx, pc := context.WithTimeout(ctx, 10*time.Second) + err := conn.Ping(pctx) + pc() + if err != nil { + return + } + case msg, ok := <-client.Ch: + if !ok { + _ = conn.Write(ctx, websocket.MessageText, []byte(`{"type":"closed"}`)) + return + } + if msg.Data != nil { + if err := conn.Write(ctx, websocket.MessageBinary, msg.Data); err != nil { + return + } + continue + } + if msg.Event == "exit" { + b, _ := json.Marshal(map[string]any{"type": "exit", "code": msg.Code}) + _ = conn.Write(ctx, websocket.MessageText, b) + } + } + } + }() + + // reader: socket → PTY (binary) or control (text JSON). + for { + typ, data, err := conn.Read(ctx) + if err != nil { + return + } + switch typ { + case websocket.MessageBinary: + if err := s.mgr.Write(id, data); err != nil && !errors.Is(err, term.ErrNotFound) { + log.Printf("pty write %s: %v", id, err) + } + case websocket.MessageText: + var m resizeMsg + if json.Unmarshal(data, &m) == nil && m.Type == "resize" { + _ = s.mgr.Resize(id, m.Cols, m.Rows) + } + } + } +} + +// ---- static UI with SPA fallback ---- + +func (s *Server) static(w http.ResponseWriter, r *http.Request) { + p := strings.TrimPrefix(r.URL.Path, "/") + if p == "" { + p = "index.html" + } + f, err := s.ui.Open(p) + if err == nil { + st, _ := f.Stat() + f.Close() + if st != nil && !st.IsDir() { + if strings.HasPrefix(p, "assets/") { + w.Header().Set("Cache-Control", "public, max-age=31536000, immutable") + } else { + w.Header().Set("Cache-Control", "no-cache") + } + http.ServeFileFS(w, r, s.ui, p) + return + } + } + // SPA fallback + w.Header().Set("Cache-Control", "no-cache") + http.ServeFileFS(w, r, s.ui, "index.html") +} diff --git a/internal/auth/auth.go b/internal/auth/auth.go new file mode 100644 index 0000000..316b907 --- /dev/null +++ b/internal/auth/auth.go @@ -0,0 +1,160 @@ +// Package auth: argon2id password hashing, cookie sessions, login rate limiting. +package auth + +import ( + "crypto/rand" + "crypto/subtle" + "encoding/base64" + "encoding/hex" + "errors" + "fmt" + "strings" + "sync" + "time" + + "golang.org/x/crypto/argon2" + + "hamlet/internal/store" +) + +const ( + argonTime = 3 + argonMemory = 64 * 1024 + argonThreads = 2 + argonKeyLen = 32 + + SessionTTL = 30 * 24 * time.Hour +) + +func HashPassword(pw string) (string, error) { + salt := make([]byte, 16) + if _, err := rand.Read(salt); err != nil { + return "", err + } + key := argon2.IDKey([]byte(pw), salt, argonTime, argonMemory, argonThreads, argonKeyLen) + enc := base64.RawStdEncoding.EncodeToString + return fmt.Sprintf("$argon2id$v=19$m=%d,t=%d,p=%d$%s$%s", + argonMemory, argonTime, argonThreads, enc(salt), enc(key)), nil +} + +func VerifyPassword(hash, pw string) bool { + parts := strings.Split(hash, "$") + if len(parts) != 6 || parts[1] != "argon2id" { + return false + } + var m, t uint32 + var p uint8 + if _, err := fmt.Sscanf(parts[3], "m=%d,t=%d,p=%d", &m, &t, &p); err != nil { + return false + } + salt, err := base64.RawStdEncoding.DecodeString(parts[4]) + if err != nil { + return false + } + want, err := base64.RawStdEncoding.DecodeString(parts[5]) + if err != nil { + return false + } + got := argon2.IDKey([]byte(pw), salt, t, m, p, uint32(len(want))) + return subtle.ConstantTimeCompare(got, want) == 1 +} + +// Sessions is a token store backed by the state file. Expiry is sliding. +type Sessions struct { + st *store.Store +} + +func NewSessions(st *store.Store) *Sessions { + s := &Sessions{st: st} + _ = st.Update(func(state *store.State) { pruneExpired(state) }) + return s +} + +func pruneExpired(state *store.State) { + now := time.Now() + for tok, exp := range state.Sessions { + if exp.Before(now) { + delete(state.Sessions, tok) + } + } +} + +func (s *Sessions) Create() (string, error) { + b := make([]byte, 32) + if _, err := rand.Read(b); err != nil { + return "", err + } + tok := hex.EncodeToString(b) + err := s.st.Update(func(state *store.State) { + pruneExpired(state) + state.Sessions[tok] = time.Now().Add(SessionTTL) + }) + return tok, err +} + +// Valid reports whether tok is live, sliding its expiry (persisted at most hourly). +func (s *Sessions) Valid(tok string) bool { + if tok == "" { + return false + } + ok := false + extend := false + s.st.View(func(state *store.State) { + exp, found := state.Sessions[tok] + if found && exp.After(time.Now()) { + ok = true + extend = time.Until(exp) < SessionTTL-time.Hour + } + }) + if ok && extend { + _ = s.st.Update(func(state *store.State) { + if _, found := state.Sessions[tok]; found { + state.Sessions[tok] = time.Now().Add(SessionTTL) + } + }) + } + return ok +} + +func (s *Sessions) Delete(tok string) { + _ = s.st.Update(func(state *store.State) { delete(state.Sessions, tok) }) +} + +// Limiter is a single global backoff: after 5 failures, each further failure +// doubles a lockout starting at 30s, capped at 10 minutes. Single-user box. +type Limiter struct { + mu sync.Mutex + failures int + lockUntil time.Time +} + +var ErrLocked = errors.New("too many failed logins") + +func (l *Limiter) Allow() error { + l.mu.Lock() + defer l.mu.Unlock() + if time.Now().Before(l.lockUntil) { + return ErrLocked + } + return nil +} + +func (l *Limiter) Fail() { + l.mu.Lock() + defer l.mu.Unlock() + l.failures++ + if l.failures >= 5 { + d := 30 * time.Second << uint(l.failures-5) + if d > 10*time.Minute { + d = 10 * time.Minute + } + l.lockUntil = time.Now().Add(d) + } +} + +func (l *Limiter) Reset() { + l.mu.Lock() + defer l.mu.Unlock() + l.failures = 0 + l.lockUntil = time.Time{} +} diff --git a/internal/config/config.go b/internal/config/config.go new file mode 100644 index 0000000..3a72f21 --- /dev/null +++ b/internal/config/config.go @@ -0,0 +1,55 @@ +// Package config loads and saves hamlet's JSON config file. +package config + +import ( + "encoding/json" + "errors" + "fmt" + "os" + "path/filepath" +) + +type Config struct { + Listen string `json:"listen"` + PasswordHash string `json:"password_hash"` + + path string +} + +func Default(path string) *Config { + return &Config{Listen: "127.0.0.1:8100", path: path} +} + +// Load reads the config at path. A missing file yields the defaults. +func Load(path string) (*Config, error) { + c := Default(path) + b, err := os.ReadFile(path) + if errors.Is(err, os.ErrNotExist) { + return c, nil + } + if err != nil { + return nil, err + } + if err := json.Unmarshal(b, c); err != nil { + return nil, fmt.Errorf("parse %s: %w", path, err) + } + return c, nil +} + +func (c *Config) Path() string { return c.path } +func (c *Config) DataDir() string { return filepath.Dir(c.path) } + +func (c *Config) Save() error { + if err := os.MkdirAll(c.DataDir(), 0o700); err != nil { + return err + } + b, err := json.MarshalIndent(c, "", " ") + if err != nil { + return err + } + tmp := c.path + ".tmp" + if err := os.WriteFile(tmp, append(b, '\n'), 0o600); err != nil { + return err + } + return os.Rename(tmp, c.path) +} diff --git a/internal/store/store.go b/internal/store/store.go new file mode 100644 index 0000000..c905722 --- /dev/null +++ b/internal/store/store.go @@ -0,0 +1,71 @@ +// Package store persists small runtime state (terminal names, login sessions) +// to a JSON file with atomic writes. +package store + +import ( + "encoding/json" + "errors" + "os" + "sync" + "time" +) + +type Terminal struct { + ID string `json:"id"` + Name string `json:"name"` +} + +type State struct { + Terminals []Terminal `json:"terminals"` + Sessions map[string]time.Time `json:"sessions"` // token -> expiry +} + +type Store struct { + mu sync.Mutex + path string + state State +} + +func Open(path string) (*Store, error) { + s := &Store{path: path} + b, err := os.ReadFile(path) + if err != nil && !errors.Is(err, os.ErrNotExist) { + return nil, err + } + if err == nil { + if err := json.Unmarshal(b, &s.state); err != nil { + return nil, err + } + } + if s.state.Sessions == nil { + s.state.Sessions = map[string]time.Time{} + } + return s, nil +} + +// Update applies fn under the lock and writes the result to disk. +func (s *Store) Update(fn func(*State)) error { + s.mu.Lock() + defer s.mu.Unlock() + fn(&s.state) + return s.save() +} + +// View reads state under the lock. +func (s *Store) View(fn func(*State)) { + s.mu.Lock() + defer s.mu.Unlock() + fn(&s.state) +} + +func (s *Store) save() error { + b, err := json.MarshalIndent(&s.state, "", " ") + if err != nil { + return err + } + tmp := s.path + ".tmp" + if err := os.WriteFile(tmp, b, 0o600); err != nil { + return err + } + return os.Rename(tmp, s.path) +} diff --git a/internal/term/manager.go b/internal/term/manager.go new file mode 100644 index 0000000..5d284a5 --- /dev/null +++ b/internal/term/manager.go @@ -0,0 +1,287 @@ +// Package term owns PTY-backed shell sessions that outlive any one browser tab. +package term + +import ( + "crypto/rand" + "encoding/hex" + "errors" + "os" + "os/exec" + "sort" + "sync" + "syscall" + "time" + + "github.com/creack/pty" +) + +const ( + ringSize = 256 * 1024 + clientBuf = 512 + killGrace = 3 * time.Second + readChunk = 32 * 1024 + defaultCol = 120 + defaultRow = 30 +) + +var ErrNotFound = errors.New("terminal not found") + +// Msg is one unit of output to a client: raw PTY bytes, or a control event. +type Msg struct { + Data []byte // non-nil for PTY output + Event string // "exit" when the shell has ended + Code int +} + +type Client struct { + Ch chan Msg + session *Session + dropped bool +} + +type Info struct { + ID string `json:"id"` + Name string `json:"name"` + Running bool `json:"running"` + ExitCode int `json:"exit_code"` + Created time.Time `json:"created"` + Clients int `json:"clients"` +} + +type Session struct { + ID string + Name string + Created time.Time + + mu sync.Mutex + ptmx *os.File + cmd *exec.Cmd + ring *Ring + clients map[*Client]struct{} + running bool + exitCode int +} + +type Manager struct { + mu sync.RWMutex + sessions map[string]*Session + shell string + home string + OnChange func([]Info) // called (without locks held) when the list changes +} + +func NewManager(shell, home string) *Manager { + return &Manager{sessions: map[string]*Session{}, shell: shell, home: home} +} + +func newID() string { + b := make([]byte, 4) + _, _ = rand.Read(b) + return hex.EncodeToString(b) +} + +// Create starts a new login shell. id may be empty. +func (m *Manager) Create(id, name string) (*Session, error) { + if id == "" { + id = newID() + } + cmd := exec.Command(m.shell, "-l") + cmd.Dir = m.home + cmd.Env = append(os.Environ(), "TERM=xterm-256color", "COLORTERM=truecolor", "HAMLET=1") + ptmx, err := pty.StartWithSize(cmd, &pty.Winsize{Cols: defaultCol, Rows: defaultRow}) + if err != nil { + return nil, err + } + s := &Session{ + ID: id, Name: name, Created: time.Now(), + ptmx: ptmx, cmd: cmd, ring: NewRing(ringSize), + clients: map[*Client]struct{}{}, running: true, + } + m.mu.Lock() + m.sessions[id] = s + m.mu.Unlock() + go m.pump(s) + m.changed() + return s, nil +} + +func (m *Manager) pump(s *Session) { + buf := make([]byte, readChunk) + for { + n, err := s.ptmx.Read(buf) + if n > 0 { + chunk := make([]byte, n) + copy(chunk, buf[:n]) + s.mu.Lock() + s.ring.Write(chunk) + s.broadcast(Msg{Data: chunk}) + s.mu.Unlock() + } + if err != nil { + break // EIO when the slave side closes + } + } + _ = s.cmd.Wait() + code := s.cmd.ProcessState.ExitCode() + s.mu.Lock() + s.running = false + s.exitCode = code + s.broadcast(Msg{Event: "exit", Code: code}) + s.mu.Unlock() + _ = s.ptmx.Close() + m.changed() +} + +// broadcast requires s.mu. Slow clients are dropped rather than blocking the PTY. +func (s *Session) broadcast(msg Msg) { + for c := range s.clients { + select { + case c.Ch <- msg: + default: + if !c.dropped { + c.dropped = true + close(c.Ch) + } + delete(s.clients, c) + } + } +} + +func (m *Manager) get(id string) (*Session, error) { + m.mu.RLock() + defer m.mu.RUnlock() + s, ok := m.sessions[id] + if !ok { + return nil, ErrNotFound + } + return s, nil +} + +func (m *Manager) List() []Info { + m.mu.RLock() + out := make([]Info, 0, len(m.sessions)) + for _, s := range m.sessions { + s.mu.Lock() + out = append(out, Info{ID: s.ID, Name: s.Name, Running: s.running, ExitCode: s.exitCode, + Created: s.Created, Clients: len(s.clients)}) + s.mu.Unlock() + } + m.mu.RUnlock() + sort.Slice(out, func(i, j int) bool { return out[i].Created.Before(out[j].Created) }) + return out +} + +func (m *Manager) Rename(id, name string) error { + s, err := m.get(id) + if err != nil { + return err + } + s.mu.Lock() + s.Name = name + s.mu.Unlock() + m.changed() + return nil +} + +// Attach subscribes a client and returns the scrollback snapshot to replay first. +func (m *Manager) Attach(id string) (*Client, []byte, bool, error) { + s, err := m.get(id) + if err != nil { + return nil, nil, false, err + } + c := &Client{Ch: make(chan Msg, clientBuf), session: s} + s.mu.Lock() + snap := s.ring.Bytes() + running := s.running + s.clients[c] = struct{}{} + s.mu.Unlock() + m.changed() + return c, snap, running, nil +} + +func (m *Manager) Detach(c *Client) { + s := c.session + s.mu.Lock() + if _, ok := s.clients[c]; ok { + delete(s.clients, c) + if !c.dropped { + c.dropped = true + close(c.Ch) + } + } + s.mu.Unlock() + m.changed() +} + +func (m *Manager) Write(id string, p []byte) error { + s, err := m.get(id) + if err != nil { + return err + } + s.mu.Lock() + running := s.running + s.mu.Unlock() + if !running { + return nil + } + _, err = s.ptmx.Write(p) + return err +} + +func (m *Manager) Resize(id string, cols, rows uint16) error { + s, err := m.get(id) + if err != nil { + return err + } + if cols == 0 || rows == 0 { + return nil + } + return pty.Setsize(s.ptmx, &pty.Winsize{Cols: cols, Rows: rows}) +} + +// Close ends the shell (SIGHUP to its process group, SIGKILL after a grace +// period) and forgets the session. +func (m *Manager) Close(id string) error { + m.mu.Lock() + s, ok := m.sessions[id] + if ok { + delete(m.sessions, id) + } + m.mu.Unlock() + if !ok { + return ErrNotFound + } + s.mu.Lock() + running := s.running + for c := range s.clients { + if !c.dropped { + c.dropped = true + close(c.Ch) + } + delete(s.clients, c) + } + s.mu.Unlock() + if running && s.cmd.Process != nil { + pid := s.cmd.Process.Pid + _ = syscall.Kill(-pid, syscall.SIGHUP) + go func() { + time.Sleep(killGrace) + _ = syscall.Kill(-pid, syscall.SIGKILL) + }() + } + m.changed() + return nil +} + +func (m *Manager) changed() { + if m.OnChange != nil { + m.OnChange(m.List()) + } +} + +// Shutdown hangs up every shell. Called on daemon exit. +func (m *Manager) Shutdown() { + for _, s := range m.List() { + _ = m.Close(s.ID) + } +} diff --git a/internal/term/ring.go b/internal/term/ring.go new file mode 100644 index 0000000..dbf37e3 --- /dev/null +++ b/internal/term/ring.go @@ -0,0 +1,37 @@ +package term + +// Ring is a fixed-size byte ring buffer holding the most recent output. +type Ring struct { + buf []byte + start int + n int +} + +func NewRing(size int) *Ring { return &Ring{buf: make([]byte, size)} } + +func (r *Ring) Write(p []byte) { + size := len(r.buf) + if len(p) >= size { + copy(r.buf, p[len(p)-size:]) + r.start, r.n = 0, size + return + } + end := (r.start + r.n) % size + first := copy(r.buf[end:], p) + copy(r.buf, p[first:]) + if r.n+len(p) > size { + r.start = (end + len(p)) % size + r.n = size + } else { + r.n += len(p) + } +} + +func (r *Ring) Bytes() []byte { + out := make([]byte, r.n) + first := copy(out, r.buf[r.start:]) + if first < r.n { + copy(out[first:], r.buf[:r.n-first]) + } + return out +} diff --git a/internal/web/embed.go b/internal/web/embed.go new file mode 100644 index 0000000..583c901 --- /dev/null +++ b/internal/web/embed.go @@ -0,0 +1,18 @@ +// Package web embeds the built frontend (web/dist, produced by `make web`). +package web + +import ( + "embed" + "io/fs" +) + +//go:embed all:dist +var dist embed.FS + +func FS() fs.FS { + sub, err := fs.Sub(dist, "dist") + if err != nil { + panic(err) + } + return sub +} diff --git a/web/index.html b/web/index.html new file mode 100644 index 0000000..8660e4f --- /dev/null +++ b/web/index.html @@ -0,0 +1,20 @@ + + + + + + + + + + + + + + Hamlet + + +
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"node scripts/icons.mjs" + }, + "dependencies": { + "@xterm/addon-fit": "^0.10.0", + "@xterm/addon-web-links": "^0.11.0", + "@xterm/xterm": "^5.5.0", + "react": "^18.3.1", + "react-dom": "^18.3.1" + }, + "devDependencies": { + "@types/react": "^18.3.12", + "@types/react-dom": "^18.3.1", + "@vitejs/plugin-react": "^4.3.4", + "typescript": "^5.6.3", + "vite": "^5.4.11" + } +} diff --git a/web/public/icons/apple-touch-icon.png b/web/public/icons/apple-touch-icon.png new file mode 100644 index 0000000..156229a Binary files /dev/null and b/web/public/icons/apple-touch-icon.png differ diff --git a/web/public/icons/icon-192.png b/web/public/icons/icon-192.png new file mode 100644 index 0000000..43a0df8 Binary files /dev/null and b/web/public/icons/icon-192.png differ diff --git a/web/public/icons/icon-512-maskable.png b/web/public/icons/icon-512-maskable.png new file mode 100644 index 0000000..fb5cbb9 Binary files /dev/null and b/web/public/icons/icon-512-maskable.png differ diff --git a/web/public/icons/icon-512.png b/web/public/icons/icon-512.png new file mode 100644 index 0000000..0896b99 Binary files /dev/null and b/web/public/icons/icon-512.png differ diff --git a/web/public/manifest.webmanifest b/web/public/manifest.webmanifest new file mode 100644 index 0000000..c24d929 --- /dev/null +++ b/web/public/manifest.webmanifest @@ -0,0 +1,16 @@ +{ + "name": "Hamlet", + "short_name": "Hamlet", + "description": "Linux management console", + "start_url": "/", + "scope": "/", + "display": "standalone", + "orientation": "any", + "background_color": "#111418", + "theme_color": "#111418", + "icons": [ + { "src": "/icons/icon-192.png", "sizes": "192x192", "type": "image/png" }, + { "src": "/icons/icon-512.png", "sizes": "512x512", "type": "image/png" }, + { "src": "/icons/icon-512-maskable.png", "sizes": "512x512", "type": "image/png", "purpose": "maskable" } + ] +} diff --git a/web/public/sw.js b/web/public/sw.js new file mode 100644 index 0000000..af261a6 --- /dev/null +++ b/web/public/sw.js @@ -0,0 +1,17 @@ +// Hamlet service worker: cache hashed assets, never the API, network-first for the shell. +const CACHE = 'hamlet-v1'; +self.addEventListener('install', () => self.skipWaiting()); +self.addEventListener('activate', (e) => { + e.waitUntil(caches.keys().then((ks) => Promise.all(ks.filter((k) => k !== CACHE).map((k) => caches.delete(k)))).then(() => self.clients.claim())); +}); +self.addEventListener('fetch', (e) => { + const url = new URL(e.request.url); + if (e.request.method !== 'GET' || url.origin !== location.origin || url.pathname.startsWith('/api/')) return; + if (url.pathname.startsWith('/assets/') || url.pathname.startsWith('/icons/')) { + e.respondWith(caches.open(CACHE).then(async (c) => (await c.match(e.request)) || fetch(e.request).then((r) => { if (r.ok) c.put(e.request, r.clone()); return r; }))); + return; + } + // navigations + everything else: network first, fall back to cached index + e.respondWith(fetch(e.request).then((r) => { if (r.ok && e.request.mode === 'navigate') caches.open(CACHE).then((c) => c.put('/', r.clone())); return r; }) + .catch(() => caches.match(e.request.mode === 'navigate' ? '/' : e.request))); +}); diff --git a/web/scripts/icons.mjs b/web/scripts/icons.mjs new file mode 100644 index 0000000..9f102f7 --- /dev/null +++ b/web/scripts/icons.mjs @@ -0,0 +1,26 @@ +// Renders the PWA icons with node-canvas (borrowed from ../../calorie-counter/node_modules). +import { createRequire } from 'node:module' +import { writeFileSync } from 'node:fs' +const require = createRequire(import.meta.url) +const { createCanvas } = require('/home/core/projects/calorie-counter/node_modules/canvas') + +function draw(size, { pad = 0, radius = 0 }) { + const c = createCanvas(size, size), g = c.getContext('2d') + g.fillStyle = '#111418' + if (radius) { g.beginPath(); g.roundRect(0, 0, size, size, radius); g.fill() } else g.fillRect(0, 0, size, size) + const inner = size - pad * 2 + g.fillStyle = '#e3a33b' + g.font = `bold ${inner * 0.62}px "DejaVu Serif", serif` + g.textAlign = 'center'; g.textBaseline = 'middle' + g.fillText('H', size / 2, size / 2 + inner * 0.03) + // prompt caret + g.fillStyle = '#58a6ff' + g.font = `bold ${inner * 0.22}px "DejaVu Sans Mono", monospace` + g.fillText('>_', size / 2 + inner * 0.27, size / 2 + inner * 0.27) + return c.toBuffer('image/png') +} +writeFileSync('public/icons/icon-192.png', draw(192, {})) +writeFileSync('public/icons/icon-512.png', draw(512, {})) +writeFileSync('public/icons/icon-512-maskable.png', draw(512, { pad: 80 })) +writeFileSync('public/icons/apple-touch-icon.png', draw(180, {})) +console.log('icons written') diff --git a/web/src/App.tsx b/web/src/App.tsx new file mode 100644 index 0000000..6dfe9eb --- /dev/null +++ b/web/src/App.tsx @@ -0,0 +1,23 @@ +import { useCallback, useEffect, useState } from 'react' +import { api, Me, Unauthenticated } from './api' +import Login from './Login' +import Shell from './Shell' + +export default function App() { + const [me, setMe] = useState(undefined) + + const refresh = useCallback(async () => { + try { setMe(await api.me()) } catch (e) { if (e instanceof Unauthenticated) setMe(null) } + }, []) + + useEffect(() => { refresh() }, [refresh]) + useEffect(() => { + if (!me) return + const t = setInterval(refresh, 30000) + return () => clearInterval(t) + }, [me, refresh]) + + if (me === undefined) return
…
+ if (me === null) return + return setMe(null)} /> +} diff --git a/web/src/KeyBar.tsx b/web/src/KeyBar.tsx new file mode 100644 index 0000000..ba45f83 --- /dev/null +++ b/web/src/KeyBar.tsx @@ -0,0 +1,18 @@ +import { useState } from 'react' + +const KEYS: [string, string][] = [ + ['Esc', '\x1b'], ['Tab', '\t'], ['↑', '\x1b[A'], ['↓', '\x1b[B'], ['←', '\x1b[D'], ['→', '\x1b[C'], + ['Home', '\x1b[H'], ['End', '\x1b[F'], ['|', '|'], ['~', '~'], ['-', '-'], ['/', '/'], ['^C', '\x03'], ['^D', '\x04'], +] + +export default function KeyBar({ send, setCtrl }: { send: (s: string) => void; setCtrl: (v: boolean) => void }) { + const [ctrl, setCtrlState] = useState(false) + const toggle = () => { const v = !ctrl; setCtrlState(v); setCtrl(v) } + const press = (s: string) => { send(s); if (ctrl) { setCtrlState(false); setCtrl(false) } } + return ( +
e.preventDefault()}> + + {KEYS.map(([label, seq]) => )} +
+ ) +} diff --git a/web/src/Login.tsx b/web/src/Login.tsx new file mode 100644 index 0000000..a05e8b9 --- /dev/null +++ b/web/src/Login.tsx @@ -0,0 +1,28 @@ +import { FormEvent, useState } from 'react' +import { api } from './api' + +export default function Login({ onLogin }: { onLogin: () => void }) { + const [pw, setPw] = useState('') + const [err, setErr] = useState('') + const [busy, setBusy] = useState(false) + + async function submit(e: FormEvent) { + e.preventDefault() + setBusy(true); setErr('') + try { await api.login(pw); onLogin() } + catch (e) { setErr(e instanceof Error ? e.message : 'login failed') } + finally { setBusy(false) } + } + + return ( +
+
+

Hamlet

+ setPw(e.target.value)} /> + + {err &&
{err}
} +
+
+ ) +} diff --git a/web/src/Rail.tsx b/web/src/Rail.tsx new file mode 100644 index 0000000..1d555fa --- /dev/null +++ b/web/src/Rail.tsx @@ -0,0 +1,49 @@ +import { useState } from 'react' +import { Term } from './api' + +export interface Group { id: string; label: string; icon: string; soon?: boolean } + +interface Props { + groups: Group[]; terms: Term[]; active: string | null + onSelect: (id: string) => void; onNew: () => void + onRename: (t: Term) => void; onClose: (t: Term) => void +} + +export default function Rail({ groups, terms, active, onSelect, onNew, onRename, onClose }: Props) { + const [open, setOpen] = useState('terminal') + return ( + + ) +} diff --git a/web/src/Shell.tsx b/web/src/Shell.tsx new file mode 100644 index 0000000..fb2b358 --- /dev/null +++ b/web/src/Shell.tsx @@ -0,0 +1,100 @@ +import { useCallback, useEffect, useRef, useState } from 'react' +import { api, Me, Term } from './api' +import Rail, { Group } from './Rail' +import TerminalPane, { TermHandle } from './TerminalPane' +import KeyBar from './KeyBar' + +const GROUPS: Group[] = [ + { id: 'terminal', label: 'Terminal', icon: '>_' }, + { id: 'services', label: 'Services', icon: '⚙', soon: true }, + { id: 'cron', label: 'Cron', icon: '⏱', soon: true }, + { id: 'zfs', label: 'ZFS', icon: '▤', soon: true }, + { id: 'dashboard', label: 'Dashboard', icon: '◔', soon: true }, +] + +function fmtUptime(s: number): string { + const d = Math.floor(s / 86400), h = Math.floor((s % 86400) / 3600), m = Math.floor((s % 3600) / 60) + return d > 0 ? `${d}d ${h}h` : h > 0 ? `${h}h ${m}m` : `${m}m` +} + +export default function Shell({ me, onLoggedOut }: { me: Me; onLoggedOut: () => void }) { + const [terms, setTerms] = useState([]) + const [active, setActive] = useState(null) + const [drawer, setDrawer] = useState(false) + const [online, setOnline] = useState(true) + const handles = useRef>({}) + + const reload = useCallback(async () => { + const list = await api.terminals() + setTerms(list) + setActive((a) => (a && list.some((t) => t.id === a) ? a : list[0]?.id ?? null)) + }, []) + + useEffect(() => { reload() }, [reload]) + + async function create() { + const t = await api.createTerminal() + await reload() + setActive(t.id) + setDrawer(false) + } + async function rename(t: Term) { + const name = window.prompt('Rename terminal', t.name) + if (name && name.trim() && name !== t.name) { await api.renameTerminal(t.id, name.trim()); await reload() } + } + async function close(t: Term) { + if (t.running && !window.confirm(`Close "${t.name}"? The shell will be hung up.`)) return + await api.deleteTerminal(t.id) + delete handles.current[t.id] + await reload() + } + async function logout() { await api.logout(); onLoggedOut() } + + const activeTerm = terms.find((t) => t.id === active) + + return ( +
+
+ + Hamlet + {me.user}@{me.host} + + {me.load} + + +
+ +
+ { setActive(id); setDrawer(false) }} + onNew={create} onRename={rename} onClose={close} /> +
setDrawer(false)} /> + +
+ {terms.length === 0 && ( +
+
No terminals.
+ +
+ )} + {terms.map((t) => ( + { if (h) handles.current[t.id] = h; else delete handles.current[t.id] }} + onStatus={(ok) => { if (t.id === active) setOnline(ok) }} + onExit={reload} /> + ))} +
+
+ + {activeTerm && handles.current[activeTerm.id]?.input(s)} + setCtrl={(v) => handles.current[activeTerm.id]?.armCtrl(v)} />} + +
+ v{me.version} + up {fmtUptime(me.uptime)} + + {activeTerm ? activeTerm.name : ''} +
+
+ ) +} diff --git a/web/src/TerminalPane.tsx b/web/src/TerminalPane.tsx new file mode 100644 index 0000000..eeb5155 --- /dev/null +++ b/web/src/TerminalPane.tsx @@ -0,0 +1,128 @@ +import { useEffect, useRef } from 'react' +import { Terminal } from '@xterm/xterm' +import { FitAddon } from '@xterm/addon-fit' +import { WebLinksAddon } from '@xterm/addon-web-links' +import { wsURL } from './api' + +export interface TermHandle { input: (s: string) => void; armCtrl: (v: boolean) => void } + +interface Props { + id: string; active: boolean + register: (h: TermHandle | null) => void + onStatus: (ok: boolean) => void + onExit: () => void +} + +const THEME = { + background: '#0d1117', foreground: '#d0d7de', cursor: '#d0d7de', selectionBackground: '#264f78', + black: '#0d1117', red: '#ff7b72', green: '#3fb950', yellow: '#d29922', blue: '#58a6ff', + magenta: '#bc8cff', cyan: '#39c5cf', white: '#b1bac4', brightBlack: '#6e7681', brightRed: '#ffa198', + brightGreen: '#56d364', brightYellow: '#e3b341', brightBlue: '#79c0ff', brightMagenta: '#d2a8ff', + brightCyan: '#56d4dd', brightWhite: '#f0f6fc', +} + +export default function TerminalPane({ id, active, register, onStatus, onExit }: Props) { + const box = useRef(null) + const activeRef = useRef(active) + activeRef.current = active + const cbs = useRef({ onStatus, onExit }) + cbs.current = { onStatus, onExit } + const fitRef = useRef<() => void>(() => {}) + + useEffect(() => { + const el = box.current! + const term = new Terminal({ + theme: THEME, fontFamily: 'ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace', + fontSize: window.matchMedia('(pointer: coarse)').matches ? 13 : 14, + cursorBlink: true, scrollback: 5000, allowProposedApi: true, + }) + const fit = new FitAddon() + term.loadAddon(fit) + term.loadAddon(new WebLinksAddon()) + term.open(el) + + let ws: WebSocket | null = null + let closed = false + let ctrlArmed = false + let retry = 0 + let retryTimer: number | undefined + let lastSize = '' + const enc = new TextEncoder() + + const send = (s: string) => { if (ws && ws.readyState === WebSocket.OPEN) ws.send(enc.encode(s)) } + const sendResize = () => { + const key = `${term.cols}x${term.rows}` + if (key === lastSize) return + lastSize = key + if (ws && ws.readyState === WebSocket.OPEN) ws.send(JSON.stringify({ type: 'resize', cols: term.cols, rows: term.rows })) + } + const doFit = () => { + if (!activeRef.current || el.clientWidth === 0 || el.clientHeight === 0) return + fit.fit() + sendResize() + } + + const connect = () => { + if (closed) return + const sock = new WebSocket(wsURL(id)) + sock.binaryType = 'arraybuffer' + ws = sock + sock.onopen = () => { retry = 0; cbs.current.onStatus(true); lastSize = ''; doFit() } + sock.onmessage = (ev) => { + if (ev.data instanceof ArrayBuffer) { term.write(new Uint8Array(ev.data)); return } + try { + const m = JSON.parse(ev.data) + if (m.type === 'exit') { term.write('\r\n\x1b[90m[process exited' + (m.code !== undefined ? ` (${m.code})` : '') + ']\x1b[0m\r\n'); closed = true; cbs.current.onExit() } + if (m.type === 'closed') closed = true + } catch { /* ignore */ } + } + sock.onclose = () => { + if (ws !== sock) return + cbs.current.onStatus(false) + if (closed) return + retryTimer = window.setTimeout(connect, Math.min(1000 * 2 ** retry++, 15000)) + } + sock.onerror = () => sock.close() + } + connect() + + term.onData((d) => { + if (ctrlArmed && d.length === 1) { + ctrlArmed = false + const c = d.toUpperCase().charCodeAt(0) + if (c >= 64 && c <= 95) { send(String.fromCharCode(c & 0x1f)); return } + } + send(d) + }) + term.onBinary((d) => send(d)) + term.onResize(sendResize) + + fitRef.current = () => { doFit(); term.focus() } + const ro = new ResizeObserver(() => doFit()) + ro.observe(el) + const onVis = () => { if (document.visibilityState === 'visible' && ws && ws.readyState !== WebSocket.OPEN && !closed) { clearTimeout(retryTimer); connect() } } + document.addEventListener('visibilitychange', onVis) + + register({ input: send, armCtrl: (v) => { ctrlArmed = v; term.focus() } }) + + return () => { + register(null) + closed = true + clearTimeout(retryTimer) + document.removeEventListener('visibilitychange', onVis) + ro.disconnect() + ws?.close() + term.dispose() + } + // eslint-disable-next-line react-hooks/exhaustive-deps + }, [id]) + + // Refit + focus whenever this pane becomes the visible one (after the display change applies). + useEffect(() => { + if (!active) return + const t = window.setTimeout(() => fitRef.current(), 0) + return () => clearTimeout(t) + }, [active]) + + return
+} diff --git a/web/src/api.ts b/web/src/api.ts new file mode 100644 index 0000000..2fd9430 --- /dev/null +++ b/web/src/api.ts @@ -0,0 +1,36 @@ +export class Unauthenticated extends Error {} + +async function req(method: string, path: string, body?: unknown): Promise { + const r = await fetch(path, { + method, + credentials: 'same-origin', + headers: body !== undefined ? { 'Content-Type': 'application/json' } : undefined, + body: body !== undefined ? JSON.stringify(body) : undefined, + }) + if (r.status === 401) throw new Unauthenticated() + if (!r.ok) { + let msg = r.statusText + try { msg = (await r.json()).error ?? msg } catch { /* ignore */ } + throw new Error(msg) + } + if (r.status === 204) return undefined as T + return r.json() +} + +export interface Me { host: string; user: string; version: string; load: string; uptime: number } +export interface Term { id: string; name: string; running: boolean; exit_code: number; created: string; clients: number } + +export const api = { + login: (password: string) => req('POST', '/api/login', { password }), + logout: () => req('POST', '/api/logout'), + me: () => req('GET', '/api/me'), + terminals: () => req('GET', '/api/terminals'), + createTerminal: (name?: string) => req<{ id: string; name: string }>('POST', '/api/terminals', { name }), + renameTerminal: (id: string, name: string) => req('PATCH', `/api/terminals/${id}`, { name }), + deleteTerminal: (id: string) => req('DELETE', `/api/terminals/${id}`), +} + +export function wsURL(id: string): string { + const proto = location.protocol === 'https:' ? 'wss:' : 'ws:' + return `${proto}//${location.host}/api/terminals/${id}/attach` +} diff --git a/web/src/main.tsx b/web/src/main.tsx new file mode 100644 index 0000000..5d18c6e --- /dev/null +++ b/web/src/main.tsx @@ -0,0 +1,15 @@ +import React from 'react' +import { createRoot } from 'react-dom/client' +import App from './App' +import '@xterm/xterm/css/xterm.css' +import './styles.css' + +createRoot(document.getElementById('root')!).render( + + + , +) + +if ('serviceWorker' in navigator && location.protocol === 'https:') { + window.addEventListener('load', () => { navigator.serviceWorker.register('/sw.js').catch(() => {}) }) +} diff --git a/web/src/styles.css b/web/src/styles.css new file mode 100644 index 0000000..658796e --- /dev/null +++ b/web/src/styles.css @@ -0,0 +1,78 @@ +:root { + --bg: #111418; --bg2: #171b21; --bg3: #1e242c; --border: #2a313b; + --fg: #d0d7de; --muted: #7d8590; --accent: #e3a33b; --accent2: #58a6ff; + --ok: #3fb950; --bad: #ff7b72; + --header-h: 44px; --footer-h: 28px; --rail-w: 220px; +} +* { box-sizing: border-box; } +html, body, #root { height: 100%; margin: 0; } +body { background: var(--bg); color: var(--fg); font: 14px/1.4 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; overscroll-behavior: none; } +button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; } +.spacer { flex: 1; } +.muted { color: var(--muted); } +.center { height: 100%; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px; } + +/* login */ +.login { display: flex; flex-direction: column; gap: 10px; width: min(320px, 90vw); } +.login h1 { margin: 0 0 8px; font-weight: 600; color: var(--accent); letter-spacing: .5px; } +.login input { padding: 10px 12px; background: var(--bg2); border: 1px solid var(--border); border-radius: 6px; color: var(--fg); font-size: 16px; } +.login button, .primary { padding: 10px 12px; background: var(--accent); color: #111; border-radius: 6px; font-weight: 600; } +.login button:disabled { opacity: .5; } +.error { color: var(--bad); font-size: 13px; } + +/* layout */ +.app { height: 100%; display: flex; flex-direction: column; padding-top: env(safe-area-inset-top); } +.header { height: var(--header-h); display: flex; align-items: center; gap: 12px; padding: 0 12px; background: var(--bg2); border-bottom: 1px solid var(--border); } +.brand { font-weight: 700; color: var(--accent); letter-spacing: .5px; } +.host { color: var(--muted); font-family: ui-monospace, monospace; font-size: 13px; } +.stat { font-family: ui-monospace, monospace; font-size: 12px; color: var(--muted); } +.dot { width: 8px; height: 8px; border-radius: 50%; background: var(--muted); } +.dot.ok { background: var(--ok); } .dot.bad { background: var(--bad); } +.link { color: var(--muted); } .link:hover { color: var(--fg); } +.icon-btn { padding: 2px 6px; color: var(--muted); border-radius: 4px; } .icon-btn:hover { color: var(--fg); background: var(--bg3); } +.menu { display: none; font-size: 18px; } +.body { flex: 1; display: flex; min-height: 0; position: relative; } +.footer { height: var(--footer-h); display: flex; align-items: center; gap: 16px; padding: 0 12px; background: var(--bg2); border-top: 1px solid var(--border); font-size: 12px; color: var(--muted); padding-bottom: env(safe-area-inset-bottom); box-sizing: content-box; } + +/* rail */ +.rail { width: var(--rail-w); background: var(--bg2); border-right: 1px solid var(--border); overflow-y: auto; padding: 6px 0; flex-shrink: 0; } +.group-head { width: 100%; display: flex; align-items: center; gap: 8px; padding: 8px 12px; text-align: left; } +.group-head:hover { background: var(--bg3); } +.group.soon .group-head { color: var(--muted); cursor: default; } +.group.soon .group-head:hover { background: none; } +.chev { width: 10px; color: var(--muted); font-size: 11px; } +.gicon { width: 18px; text-align: center; color: var(--accent2); font-family: ui-monospace, monospace; font-size: 12px; } +.badge { margin-left: auto; font-size: 10px; text-transform: uppercase; border: 1px solid var(--border); border-radius: 3px; padding: 0 4px; } +.leaves { padding: 2px 0 6px; } +.leaf { display: flex; align-items: center; gap: 8px; padding: 7px 12px 7px 30px; cursor: pointer; width: 100%; text-align: left; } +.leaf:hover { background: var(--bg3); } +.leaf.active { background: var(--bg3); box-shadow: inset 3px 0 0 var(--accent); } +.leaf.exited .lname { color: var(--muted); text-decoration: line-through; } +.leaf.new { color: var(--accent2); } +.lname { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; } +.leaf-actions { display: flex; gap: 2px; } +.sdot { width: 7px; height: 7px; border-radius: 50%; background: var(--muted); flex-shrink: 0; } +.sdot.run { background: var(--ok); } + +/* main + terminal */ +.main { flex: 1; min-width: 0; position: relative; background: #0d1117; } +.term { position: absolute; inset: 0; padding: 6px 0 0 6px; } +.term .xterm { height: 100%; } +.xterm-viewport::-webkit-scrollbar { width: 8px; } .xterm-viewport::-webkit-scrollbar-thumb { background: var(--border); } + +/* key bar (touch devices / narrow screens) */ +.keybar { display: none; gap: 4px; padding: 4px 6px; background: var(--bg2); border-top: 1px solid var(--border); overflow-x: auto; white-space: nowrap; -webkit-overflow-scrolling: touch; } +.keybar button { flex: 0 0 auto; padding: 8px 10px; min-width: 40px; background: var(--bg3); border: 1px solid var(--border); border-radius: 5px; font-family: ui-monospace, monospace; font-size: 13px; } +.keybar button.on { background: var(--accent); color: #111; border-color: var(--accent); } +@media (pointer: coarse), (max-width: 800px) { .keybar { display: flex; } } + +/* mobile: rail becomes a drawer */ +.backdrop { display: none; } +@media (max-width: 800px) { + .menu { display: inline-block; } + .host, .stat { display: none; } + .rail { position: absolute; top: 0; bottom: 0; left: 0; z-index: 10; transform: translateX(-100%); transition: transform .15s ease; box-shadow: 4px 0 16px rgba(0,0,0,.5); } + .drawer-open .rail { transform: none; } + .drawer-open .backdrop { display: block; position: absolute; inset: 0; z-index: 9; background: rgba(0,0,0,.5); } + .footer { font-size: 11px; } +} diff --git a/web/tsconfig.json b/web/tsconfig.json new file mode 100644 index 0000000..61b917c --- /dev/null +++ b/web/tsconfig.json @@ -0,0 +1,15 @@ +{ + "compilerOptions": { + "target": "ES2020", + "lib": ["ES2020", "DOM", "DOM.Iterable"], + "module": "ESNext", + "moduleResolution": "bundler", + "jsx": "react-jsx", + "strict": true, + "skipLibCheck": true, + "noEmit": true, + "isolatedModules": true, + "resolveJsonModule": true + }, + "include": ["src"] +} diff --git a/web/vite.config.ts b/web/vite.config.ts new file mode 100644 index 0000000..a34d20b --- /dev/null +++ b/web/vite.config.ts @@ -0,0 +1,10 @@ +import { defineConfig } from 'vite' +import react from '@vitejs/plugin-react' + +export default defineConfig({ + plugins: [react()], + build: { outDir: '../internal/web/dist', emptyOutDir: true }, + server: { + proxy: { '/api': { target: 'http://127.0.0.1:8100', ws: true } }, + }, +})