| 1 | package main |
| 2 | |
| 3 | import ( |
| 4 | "context" |
| 5 | "crypto/ed25519" |
| 6 | "crypto/rand" |
| 7 | "crypto/sha256" |
| 8 | "database/sql" |
| 9 | "embed" |
| 10 | "encoding/base64" |
| 11 | "encoding/hex" |
| 12 | "encoding/json" |
| 13 | "errors" |
| 14 | "flag" |
| 15 | "fmt" |
| 16 | "html" |
| 17 | "io" |
| 18 | "io/fs" |
| 19 | "log" |
| 20 | "net" |
| 21 | "net/http" |
| 22 | "net/url" |
| 23 | "os" |
| 24 | "os/signal" |
| 25 | "strconv" |
| 26 | "strings" |
| 27 | "sync" |
| 28 | "syscall" |
| 29 | "time" |
| 30 | "unicode/utf8" |
| 31 | |
| 32 | "lchat/internal/apns" |
| 33 | ) |
| 34 | |
| 35 | // defaultMaxUploadBytes caps an encrypted attachment upload when |
| 36 | // LCHAT_MAX_UPLOAD_BYTES is unset: ~50 MB, enough for a short Signal-style video |
| 37 | // clip plus AES-GCM overhead. The blob is opaque ciphertext — the server can't |
| 38 | // tell a video from a document. |
| 39 | const defaultMaxUploadBytes = 50 << 20 |
| 40 | |
| 41 | // defaultBlobQuotaBytes caps total stored blob bytes per instance when |
| 42 | // LCHAT_BLOB_QUOTA_BYTES is unset — the disk backstop. Uploads past it are |
| 43 | // refused (507). Blobs are GC'd on message/thread delete, so this bounds |
| 44 | // worst-case media growth rather than being a hard forever-ceiling. |
| 45 | const defaultBlobQuotaBytes = 2 << 30 |
| 46 | |
| 47 | // maxServerAvatarBytes caps the admin-set instance branding photo. It's tiny by |
| 48 | // design (the admin console downscales it to ~400px first), so a small cap is |
| 49 | // plenty and keeps this plaintext asset from being abused as bulk storage. |
| 50 | const maxServerAvatarBytes = 1 << 20 |
| 51 | |
| 52 | //go:embed web/pages/*.html web/static/* |
| 53 | var webFS embed.FS |
| 54 | |
| 55 | // The changelog ships inside the binary: one short, user-facing entry per file, |
| 56 | // named <date>-<slug>.md so filename order is announcement order. The deploy |
| 57 | // announcer bot (agent/announcer.mjs) polls /api/changelog and posts entries it |
| 58 | // hasn't seen — "what just shipped" needs no external service, no repo |
| 59 | // credential, and no operator machine: it travels with the deploy itself. |
| 60 | // |
| 61 | //go:embed changelog/*.md |
| 62 | var changelogFS embed.FS |
| 63 | |
| 64 | // The mini-app authoring guide also ships inside the binary, served as plain |
| 65 | // markdown at /api/app-guide — so a member can point any LLM at that URL and |
| 66 | // have it learn how to build an app for this instance, with no repo checkout. |
| 67 | // The static checker the guide's delivery step points at rides along the same |
| 68 | // way (GET /api/check-app.mjs), so an author without the repo can still run it. |
| 69 | // |
| 70 | //go:embed docs/building-apps.md docs/building-member-apps.md tools/check-app.mjs |
| 71 | var appGuideFS embed.FS |
| 72 | |
| 73 | type Server struct { |
| 74 | db *DB |
| 75 | hub *Hub |
| 76 | pages map[string][]byte |
| 77 | changelog []ChangelogEntry |
| 78 | version string // frontend build hash; clients reload when it changes (see frontendVersion) |
| 79 | // Where the welcome page's "Get the app" button points (TestFlight / App |
| 80 | // Store link). Empty hides the button — set LCHAT_APP_STORE_URL per instance. |
| 81 | appStoreURL string |
| 82 | // The home server that hosts passkey backup enrolment. The chat page opens |
| 83 | // <homeOrigin>/enroll as a user-initiated popup to back this instance up (see |
| 84 | // the enrolment cross-origin contract); set LCHAT_HOME_ORIGIN per deployment. |
| 85 | homeOrigin string |
| 86 | // The public-web fetch service this instance's clients should prefer for |
| 87 | // unfurls (docs/fetch.md) — an origin like https://fetch.example, set via |
| 88 | // LCHAT_FETCH_URL. Empty (the default, and the self-host default on |
| 89 | // purpose) keeps unfurling on this instance's own /api/unfurl. |
| 90 | fetchURL string |
| 91 | // The cloud ledger's plan flag, mirrored into this instance's env by the |
| 92 | // provisioner (LCHAT_ENTITLEMENT, "free"/"paid"/"demo"). Gates the space |
| 93 | // menu's Upgrade entry (free) and the demo countdown band (demo); empty on |
| 94 | // self-hosted/operator instances, which have no billing surface and show |
| 95 | // nothing. Display only — a claim flips the ledger without restarting this |
| 96 | // process, so the band verifies against home's live status before showing. |
| 97 | entitlement string |
| 98 | // Where this instance's webhook-ingest sidecar is reachable from outside |
| 99 | // (LCHAT_HOOKS_BASE, e.g. "http://127.0.0.1:8090" in dev). Empty — the |
| 100 | // production default — lets clients derive https://in.<host>; set only |
| 101 | // where that derivation is wrong (local dev, unusual fronting). Served as |
| 102 | // ingest_base on GET /api/hooks/service; see hooks.go / docs/webhooks.md. |
| 103 | hooksBase string |
| 104 | vapidPub string |
| 105 | vapidPriv string |
| 106 | apns apnsSender // nil unless APNs (direct p8 or relay) is configured |
| 107 | maxUpload int64 // per-upload attachment cap (LCHAT_MAX_UPLOAD_BYTES) |
| 108 | blobQuota int64 // per-instance total blob-bytes ceiling (LCHAT_BLOB_QUOTA_BYTES) |
| 109 | // blobMirrorKick nudges the blob mirror sweep after an upload |
| 110 | // (blobmirror.go, #992). Nil unless the store is mirrored. |
| 111 | blobMirrorKick chan struct{} |
| 112 | // The usage-pipe relay (usage.go, #857): where sidecar usage reports go |
| 113 | // and the per-space meter token that authenticates them. Pushed into the |
| 114 | // env by the provisioner; empty = unmetered (self-hosted / BYO key). |
| 115 | meterURL string // LCHAT_METER_URL |
| 116 | meterToken string // LCHAT_METER_TOKEN |
| 117 | // Directory of sideloaded mini-app modules served at /static/apps-custom/ |
| 118 | // (LCHAT_APPS_DIR); empty disables the feature. See customapps.go. |
| 119 | appsDir string |
| 120 | // brakes are the content-blind moderation rate limits (ratelimit.go); |
| 121 | // lazily nil-safe via s.brake() so tests constructing Server{} literals |
| 122 | // keep working. |
| 123 | brakes *modBrakes |
| 124 | // The report-notification throttle (issue #578): one push per quiet |
| 125 | // window however many reports land. In-memory on purpose — a restart at |
| 126 | // worst re-notifies once, and the queue itself is the durable record. |
| 127 | reportPushMu sync.Mutex |
| 128 | lastReportPush time.Time |
| 129 | // inflight coalesces concurrent unfurls of the same URL+language: one |
| 130 | // fetch runs, the rest wait on its *previewFlight for the shared result. |
| 131 | inflight sync.Map |
| 132 | // active tracks the last time each device token reported being open + focused |
| 133 | // (token -> unix seconds); activeUsers rolls that up per owner (user id -> unix |
| 134 | // seconds) so a new message skips push to ALL of a person's devices when they're |
| 135 | // reading on any one of them — not just the exact device they're on. |
| 136 | active sync.Map |
| 137 | activeUsers sync.Map |
| 138 | // presence tracks open sockets + last broadcast state per user, so members |
| 139 | // see who's online/away/offline (presence.go). |
| 140 | presence presenceTracker |
| 141 | // upd caches the last verified release-manifest fetch, so the admin console |
| 142 | // can say whether the tracked channel has something newer (updatecheck.go). |
| 143 | upd updateState |
| 144 | // pay is the payment provider for paid access levels (subscriptions.go). |
| 145 | // noPay unless Stripe Connect is configured — the feature is dormant then. |
| 146 | pay PayProvider |
| 147 | // subFold serializes subscription-event folds: the ordering decision |
| 148 | // (read the watermark, then write the row) spans separate statements, |
| 149 | // and webhooks arrive concurrently. |
| 150 | subFold sync.Mutex |
| 151 | // Tamper evidence (checkpoint.go): the per-instance checkpoint signing key. |
| 152 | // Empty ckptKeyPath (the default) stores the seed in the DB config so it |
| 153 | // rides restores; LCHAT_CHECKPOINT_KEY_FILE overrides to a file. ckptMu |
| 154 | // guards lazy loading (success-only caching); ckptSweepMu serializes the |
| 155 | // checkpoint sweep so the chain can't fork. |
| 156 | ckptKeyPath string |
| 157 | ckptMu sync.Mutex |
| 158 | ckptKey ed25519.PrivateKey |
| 159 | ckptSweepMu sync.Mutex |
| 160 | } |
| 161 | |
| 162 | func main() { |
| 163 | // Subcommands: `lchat router` runs the multi-instance front door and the |
| 164 | // add-instance/instances/admin-link commands manage it; anything else (bare |
| 165 | // `lchat` plus all existing flags) runs a single instance, so existing |
| 166 | // invocations are unchanged. See docs/instance-router.md. |
| 167 | if len(os.Args) > 1 { |
| 168 | switch os.Args[1] { |
| 169 | case "router": |
| 170 | runRouter(os.Args[2:]) |
| 171 | return |
| 172 | case "bootstrap": |
| 173 | runBootstrap(os.Args[2:]) |
| 174 | return |
| 175 | case "add-instance": |
| 176 | runAddInstance(os.Args[2:]) |
| 177 | return |
| 178 | case "mesh-seed": |
| 179 | runMeshSeed(os.Args[2:]) |
| 180 | return |
| 181 | case "deploy": |
| 182 | runDeploy(os.Args[2:]) |
| 183 | return |
| 184 | case "add-service": |
| 185 | runAddService(os.Args[2:]) |
| 186 | return |
| 187 | case "add-bot": |
| 188 | runAddBot(os.Args[2:]) |
| 189 | return |
| 190 | case "bot": |
| 191 | runBotCmd(os.Args[2:]) |
| 192 | return |
| 193 | case "add-hooks": |
| 194 | runAddHooks(os.Args[2:]) |
| 195 | return |
| 196 | case "hooks": |
| 197 | runHooksCmd(os.Args[2:]) |
| 198 | return |
| 199 | case "links": |
| 200 | runLinksCmd(os.Args[2:]) |
| 201 | return |
| 202 | case "fetch": |
| 203 | runFetchCmd(os.Args[2:]) |
| 204 | return |
| 205 | case "remove": |
| 206 | runRemove(os.Args[2:]) |
| 207 | return |
| 208 | case "instances": |
| 209 | runInstances(os.Args[2:]) |
| 210 | return |
| 211 | case "env": |
| 212 | runEnvCmd(os.Args[2:]) |
| 213 | return |
| 214 | case "hibernate": |
| 215 | runHibernate(os.Args[2:]) |
| 216 | return |
| 217 | case "canary": |
| 218 | runCanary(os.Args[2:]) |
| 219 | return |
| 220 | case "reset": |
| 221 | runReset(os.Args[2:]) |
| 222 | return |
| 223 | case "replication": |
| 224 | runReplication(os.Args[2:]) |
| 225 | return |
| 226 | case "relocate": |
| 227 | runRelocate(os.Args[2:]) |
| 228 | return |
| 229 | case "admin-link": |
| 230 | runAdminLink(os.Args[2:]) |
| 231 | return |
| 232 | case "setup-invite": |
| 233 | runSetupInvite(os.Args[2:]) |
| 234 | return |
| 235 | case "version": |
| 236 | // The build id compiled in via -ldflags "-X main.buildVersion=<id>". |
| 237 | // `stage` reads it from a built binary; the running instance reports it |
| 238 | // at /api/version so a deploy can confirm the swap actually took. |
| 239 | fmt.Println(buildVersion) |
| 240 | return |
| 241 | case "stage": |
| 242 | runStage(os.Args[2:]) |
| 243 | return |
| 244 | case "install": |
| 245 | runInstall(os.Args[2:]) |
| 246 | return |
| 247 | case "rollback": |
| 248 | runRollback(os.Args[2:]) |
| 249 | return |
| 250 | case "init-versions": |
| 251 | runInitVersions(os.Args[2:]) |
| 252 | return |
| 253 | case "release": |
| 254 | runRelease(os.Args[2:]) |
| 255 | return |
| 256 | case "update": |
| 257 | runUpdate(os.Args[2:]) |
| 258 | return |
| 259 | case "controld": |
| 260 | runControld(os.Args[2:]) |
| 261 | return |
| 262 | case "cloud": |
| 263 | runCloud(os.Args[2:]) |
| 264 | return |
| 265 | case "try": |
| 266 | runTryCmd(os.Args[2:]) |
| 267 | return |
| 268 | case "relay": |
| 269 | runRelayCmd(os.Args[2:]) |
| 270 | return |
| 271 | case "tunnel": |
| 272 | runTunnelCmd(os.Args[2:]) |
| 273 | return |
| 274 | } |
| 275 | // No case matched. A flag falls through to the single-instance form |
| 276 | // below (unchanged); a word does not — it is a typo, and starting a |
| 277 | // server for it is how a stray `lchat help` ran for days on a live |
| 278 | // box. See subcommands.go. |
| 279 | checkSubcommand(os.Args[1]) |
| 280 | } |
| 281 | |
| 282 | addr := flag.String("addr", envOr("ADDR", ":1747"), "listen address (env: ADDR)") |
| 283 | socket := flag.String("socket", envOr("LCHAT_SOCKET", ""), "unix socket to serve on instead of -addr (env: LCHAT_SOCKET); how the router fronts an instance") |
| 284 | dbPath := flag.String("db", envOr("LCHAT_DB", "lchat.db"), "path to SQLite database file (env: LCHAT_DB)") |
| 285 | resetAdmin := flag.Bool("reset-admin", false, "generate a new admin token and print its link") |
| 286 | resetDB := flag.Bool("reset-db", false, "delete and recreate the database") |
| 287 | flag.Parse() |
| 288 | |
| 289 | if *resetDB { |
| 290 | _ = os.Remove(*dbPath) |
| 291 | log.Printf("database reset: %s deleted", *dbPath) |
| 292 | } |
| 293 | |
| 294 | db, err := openDB(*dbPath) |
| 295 | if err != nil { |
| 296 | log.Fatalf("open db: %v", err) |
| 297 | } |
| 298 | |
| 299 | // Admin token: LCHAT_ADMIN_TOKEN env wins; otherwise generate one on first run. |
| 300 | // NB: LCHAT_-prefixed on purpose — some platforms (e.g. Miren) auto-provision |
| 301 | // a secret for a bare "ADMIN_TOKEN" and silently override your value. |
| 302 | // TrimSpace guards against env-injection paths that add surrounding whitespace. |
| 303 | if tok, err := db.ensureAdminToken(strings.TrimSpace(os.Getenv("LCHAT_ADMIN_TOKEN"))); err != nil { |
| 304 | log.Fatalf("admin token: %v", err) |
| 305 | } else if tok != "" { |
| 306 | printAdminLink(*addr, tok) |
| 307 | } |
| 308 | if *resetAdmin { |
| 309 | tok, err := db.resetAdminToken() |
| 310 | if err != nil { |
| 311 | log.Fatalf("reset admin token: %v", err) |
| 312 | } |
| 313 | printAdminLink(*addr, tok) |
| 314 | } |
| 315 | if err := applySeededName(db); err != nil { |
| 316 | log.Fatalf("seeded name: %v", err) |
| 317 | } |
| 318 | if err := applySkipSetup(db); err != nil { |
| 319 | log.Fatalf("skip-setup defaults: %v", err) |
| 320 | } |
| 321 | |
| 322 | pages, err := loadPages() |
| 323 | if err != nil { |
| 324 | log.Fatalf("load pages: %v", err) |
| 325 | } |
| 326 | hub := newHub() |
| 327 | go hub.run() |
| 328 | // TrimSpace guards against env-injection paths that add surrounding whitespace; |
| 329 | // fall back to the shared home server when unset. |
| 330 | homeOrigin := strings.TrimSpace(os.Getenv("LCHAT_HOME_ORIGIN")) |
| 331 | if homeOrigin == "" { |
| 332 | homeOrigin = defaultHomeOrigin |
| 333 | } |
| 334 | s := &Server{db: db, hub: hub, pages: pages, changelog: loadChangelog(), version: frontendVersion(), |
| 335 | appStoreURL: strings.TrimSpace(os.Getenv("LCHAT_APP_STORE_URL")), homeOrigin: homeOrigin, |
| 336 | fetchURL: strings.TrimRight(strings.TrimSpace(os.Getenv("LCHAT_FETCH_URL")), "/"), |
| 337 | entitlement: strings.TrimSpace(os.Getenv("LCHAT_ENTITLEMENT")), |
| 338 | maxUpload: envBytes("LCHAT_MAX_UPLOAD_BYTES", defaultMaxUploadBytes), |
| 339 | blobQuota: envBytes("LCHAT_BLOB_QUOTA_BYTES", defaultBlobQuotaBytes), |
| 340 | meterURL: strings.TrimSpace(os.Getenv("LCHAT_METER_URL")), |
| 341 | meterToken: strings.TrimSpace(os.Getenv("LCHAT_METER_TOKEN")), |
| 342 | hooksBase: strings.TrimRight(strings.TrimSpace(os.Getenv("LCHAT_HOOKS_BASE")), "/"), |
| 343 | appsDir: strings.TrimSpace(os.Getenv("LCHAT_APPS_DIR"))} |
| 344 | s.brakes = newModBrakes() |
| 345 | |
| 346 | // Tamper evidence (checkpoint.go): by default the signing seed lives in |
| 347 | // the DB config so it survives hibernation wakes and migrations; set |
| 348 | // LCHAT_CHECKPOINT_KEY_FILE to keep it in a file outside the DB instead. |
| 349 | s.ckptKeyPath = strings.TrimSpace(os.Getenv("LCHAT_CHECKPOINT_KEY_FILE")) |
| 350 | |
| 351 | // Web Push: self-generated VAPID keypair (no third-party account). |
| 352 | if pub, priv, err := db.ensureVAPID(); err != nil { |
| 353 | log.Fatalf("vapid: %v", err) |
| 354 | } else { |
| 355 | s.vapidPub, s.vapidPriv = pub, priv |
| 356 | } |
| 357 | s.apns = newAPNsClient() |
| 358 | |
| 359 | // Paid access levels (subscriptions.go): the Stripe Connect provider, or |
| 360 | // noPay (dormant) when unconfigured. The grace→revoke sweep only matters |
| 361 | // once entitlements exist; harmless to always run. |
| 362 | s.pay = newPayProvider(db) |
| 363 | s.startBillingSweep() |
| 364 | |
| 365 | // Mini-app scheduling: deliver due "future messages" (miniapps.go). Tests |
| 366 | // call sweepDueScheduled directly, so only the real server runs the ticker. |
| 367 | go s.runScheduler() |
| 368 | go s.runUpdateChecker() |
| 369 | // Presence idle sweep (presence.go). Tests call sweepPresence directly. |
| 370 | go s.runPresenceSweeper() |
| 371 | // Blob mirror + audit sweeps (blobmirror.go, #992). No-op unless the |
| 372 | // store is mirrored; tests call mirrorOnce/auditBlobsOnce directly. |
| 373 | s.startBlobMirror() |
| 374 | // Tamper evidence: fold new journal rows into signed checkpoints |
| 375 | // (checkpoint.go). Tests call sweepCheckpoint directly. |
| 376 | go s.runCheckpointer() |
| 377 | // Push release notes new in THIS binary to the admins (announce.go). Tests |
| 378 | // call announceChangelog directly. |
| 379 | go s.announceChangelog() |
| 380 | |
| 381 | ln, where, err := listen(*addr, *socket) |
| 382 | if err != nil { |
| 383 | log.Fatalf("listen: %v", err) |
| 384 | } |
| 385 | log.Printf("lchat listening on %s (db: %s)", where, *dbPath) |
| 386 | |
| 387 | // ReadHeaderTimeout caps how long a client may dribble request headers |
| 388 | // (Slowloris): standalone self-hosts bind this listener straight to public |
| 389 | // TCP. Same 10s the router/cloud/controld listeners use. |
| 390 | srv := &http.Server{Handler: s.handler(), ReadHeaderTimeout: 10 * time.Second} |
| 391 | go func() { |
| 392 | if err := srv.Serve(ln); err != nil && err != http.ErrServerClosed { |
| 393 | log.Fatalf("serve: %v", err) |
| 394 | } |
| 395 | }() |
| 396 | |
| 397 | // Graceful shutdown on SIGTERM/SIGINT (systemd stop/restart during a deploy): |
| 398 | // stop accepting + drain in-flight HTTP, then close WebSockets so clients |
| 399 | // reconnect to the new process. The router retries dials across the brief gap, |
| 400 | // so no request is dropped. See docs/instance-router.md. |
| 401 | sigCh := make(chan os.Signal, 1) |
| 402 | signal.Notify(sigCh, syscall.SIGTERM, syscall.SIGINT) |
| 403 | <-sigCh |
| 404 | log.Printf("lchat: draining and shutting down") |
| 405 | // Drain in-flight HTTP (e.g. a large upload) before exiting. Kept below the |
| 406 | // router's dial-retry window so the socket-absent gap during a deploy stays |
| 407 | // within what the router masks. |
| 408 | ctx, cancel := context.WithTimeout(context.Background(), 10*time.Second) |
| 409 | defer cancel() |
| 410 | _ = srv.Shutdown(ctx) |
| 411 | hub.shutdown() |
| 412 | } |
| 413 | |
| 414 | // listen returns the instance's listener. With -socket set it serves on a unix |
| 415 | // domain socket (how the router fronts an instance — see docs/instance-router.md); |
| 416 | // otherwise it's a TCP listener on addr (the standalone default, unchanged). A |
| 417 | // stale socket left by a crashed process is removed first (but a socket another |
| 418 | // process is still serving on refuses to start), and the socket is chmod 0600 so |
| 419 | // only the router (same user) can dial it. |
| 420 | func listen(addr, socketPath string) (net.Listener, string, error) { |
| 421 | if socketPath == "" { |
| 422 | ln, err := net.Listen("tcp", addr) |
| 423 | return ln, addr, err |
| 424 | } |
| 425 | // Don't clobber a live socket: only a stale one (nothing listening) is removed. |
| 426 | if c, err := net.DialTimeout("unix", socketPath, 200*time.Millisecond); err == nil { |
| 427 | c.Close() |
| 428 | return nil, "", fmt.Errorf("socket %s is already in use by another process", socketPath) |
| 429 | } |
| 430 | if err := os.Remove(socketPath); err != nil && !os.IsNotExist(err) { |
| 431 | return nil, "", fmt.Errorf("remove stale socket %s: %w", socketPath, err) |
| 432 | } |
| 433 | ln, err := net.Listen("unix", socketPath) |
| 434 | if err != nil { |
| 435 | return nil, "", err |
| 436 | } |
| 437 | if err := os.Chmod(socketPath, 0o600); err != nil { |
| 438 | ln.Close() |
| 439 | return nil, "", fmt.Errorf("chmod socket %s: %w", socketPath, err) |
| 440 | } |
| 441 | return ln, "unix:" + socketPath, nil |
| 442 | } |
| 443 | |
| 444 | // handler wires up all routes. It's a method so tests can exercise the full |
| 445 | // router via httptest without starting a real listener. |
| 446 | func (s *Server) handler() http.Handler { |
| 447 | // The moderation brakes (ratelimit.go) exist before the first request — |
| 448 | // handler() is the one door every construction path (main, tests) passes |
| 449 | // through, so the lazy s.brake() fallback never races concurrent handlers. |
| 450 | if s.brakes == nil { |
| 451 | s.brakes = newModBrakes() |
| 452 | } |
| 453 | staticFS, err := fs.Sub(webFS, "web/static") |
| 454 | if err != nil { |
| 455 | log.Fatalf("static fs: %v", err) |
| 456 | } |
| 457 | |
| 458 | mux := http.NewServeMux() |
| 459 | // Pages |
| 460 | mux.HandleFunc("GET /", s.servePage("index.html")) |
| 461 | mux.HandleFunc("GET /admin", s.servePage("admin.html")) |
| 462 | mux.HandleFunc("GET /join/{token}", s.servePage("join.html")) |
| 463 | mux.Handle("GET /static/", noCache(http.StripPrefix("/static/", http.FileServer(http.FS(staticFS))))) |
| 464 | // Custom (sideloaded) mini-apps. Deliberately one segment below /static/ so a |
| 465 | // custom app's relative `import "../apps.js"` resolves to /static/apps.js — |
| 466 | // same imports as a compiled-in app. See customapps.go for the trust model. |
| 467 | mux.Handle("GET /static/apps-custom/{name}", noCache(http.HandlerFunc(s.serveCustomApp))) |
| 468 | mux.HandleFunc("GET /api/apps", s.getCustomApps) |
| 469 | // The integrations registry (public, like /api/apps): which services can |
| 470 | // be connected and exactly what each op may do. See integrations_api.go. |
| 471 | mux.HandleFunc("GET /api/integrations", s.getIntegrations) |
| 472 | // Installing/removing custom apps is admin-only, like the rest of /api/admin. |
| 473 | mux.HandleFunc("GET /api/admin/apps", s.listCustomAppsHandler) |
| 474 | mux.HandleFunc("PUT /api/admin/apps/{name}", s.putCustomAppHandler) |
| 475 | mux.HandleFunc("DELETE /api/admin/apps/{name}", s.deleteCustomAppHandler) |
| 476 | // Member-built apps (memberapps.go): instance-key-encrypted blobs the client |
| 477 | // runs only inside the sandbox frame below. Deploying is member-gated. |
| 478 | mux.HandleFunc("GET /api/member-apps", s.listMemberAppsHandler) |
| 479 | mux.HandleFunc("GET /api/member-apps/{id}/versions", s.memberAppVersionsHandler) |
| 480 | mux.HandleFunc("PUT /api/member-apps/{id}", s.putMemberAppHandler) |
| 481 | mux.HandleFunc("DELETE /api/member-apps/{id}", s.deleteMemberAppHandler) |
| 482 | // Member bots (memberbots.go): opaque charter blobs, stored like member |
| 483 | // apps; the sidecar decrypts and runs them (docs/member-bots.md). |
| 484 | mux.HandleFunc("GET /api/member-bots", s.listMemberBotsHandler) |
| 485 | mux.HandleFunc("PUT /api/member-bots/{id}", s.putMemberBotHandler) |
| 486 | mux.HandleFunc("DELETE /api/member-bots/{id}", s.deleteMemberBotHandler) |
| 487 | // The charter host's wake-time report (bot-token-gated; folded into |
| 488 | // GET /api/next-due so hibernated charters still fire on time). |
| 489 | mux.HandleFunc("POST /api/charter-next-due", s.postCharterNextDue) |
| 490 | mux.HandleFunc("POST /api/bot-usage", s.postBotUsage) |
| 491 | // Incoming webhooks (hooks.go, docs/webhooks.md): admin-managed registry of |
| 492 | // opaque definition blobs the hooks sidecar polls; deployed is the sidecar's |
| 493 | // plaintext go-live ack. |
| 494 | mux.HandleFunc("GET /api/hooks/service", s.getHooksService) |
| 495 | mux.HandleFunc("POST /api/hooks", s.createWebhookHandler) |
| 496 | mux.HandleFunc("PUT /api/hooks/{id}/blobs", s.putWebhookBlobsHandler) |
| 497 | mux.HandleFunc("GET /api/hooks", s.listWebhooksHandler) |
| 498 | mux.HandleFunc("GET /api/hooks/defs", s.listWebhookDefsHandler) |
| 499 | mux.HandleFunc("POST /api/hooks/{id}/deployed", s.webhookDeployedHandler) |
| 500 | mux.HandleFunc("DELETE /api/hooks/{id}", s.deleteWebhookHandler) |
| 501 | // The sandbox frame document: an opaque-origin cage for member-app code. |
| 502 | mux.HandleFunc("GET /app-sandbox", s.serveAppSandbox) |
| 503 | |
| 504 | // Chat API (transport auth via invite token; never sees plaintext) |
| 505 | mux.HandleFunc("GET /api/messages", s.getMessages) |
| 506 | // Tamper evidence: the signed checkpoint chain over the event journal |
| 507 | // (checkpoint.go; docs/tamper-evidence.md). Member-gated like messages. |
| 508 | mux.HandleFunc("GET /api/checkpoints", s.getCheckpoints) |
| 509 | // Merkle inclusion proof that a held message is committed to the chain |
| 510 | // (checkpoint.go; docs/tamper-evidence.md client sampling). Member-gated. |
| 511 | mux.HandleFunc("GET /api/checkpoint-proof", s.getCheckpointProof) |
| 512 | mux.HandleFunc("POST /api/messages", s.postMessage) |
| 513 | // Message permalinks ("Copy link", issue #893): mint an opaque, server- |
| 514 | // sealed token for a message; resolve turns it back into ids only for a |
| 515 | // caller who is currently a thread member (links.go). |
| 516 | mux.HandleFunc("POST /api/messages/{id}/link", s.mintMessageLink) |
| 517 | mux.HandleFunc("POST /api/resolve-link", s.resolveMessageLink) |
| 518 | mux.HandleFunc("GET /ws", s.handleWS) |
| 519 | |
| 520 | // Threads & roster (see docs/threads-and-dms.md). The roster is the open |
| 521 | // directory; threads (DMs/groups) carry server-blind, per-member wrapped keys. |
| 522 | mux.HandleFunc("POST /api/pubkey", s.setPubkey) |
| 523 | mux.HandleFunc("GET /api/roster", s.getRoster) |
| 524 | mux.HandleFunc("GET /api/bot-config", s.getBotConfig) |
| 525 | mux.HandleFunc("POST /api/bot-config", s.declareBotKind) |
| 526 | mux.HandleFunc("GET /api/me", s.getMe) |
| 527 | mux.HandleFunc("POST /api/device/signout", s.signout) |
| 528 | mux.HandleFunc("POST /api/apns/subscribe", s.apnsSubscribe) |
| 529 | mux.HandleFunc("POST /api/apns/unsubscribe", s.apnsUnsubscribe) |
| 530 | // Instance key + profile photos: a shared key for all-members content (avatars). |
| 531 | mux.HandleFunc("GET /api/instance-key", s.getInstanceKey) |
| 532 | mux.HandleFunc("POST /api/instance-key", s.postInstanceKey) |
| 533 | |
| 534 | // The space thread — the hidden all-members thread backing space-wide apps |
| 535 | // (spacethread.go, docs/space-apps.md). |
| 536 | mux.HandleFunc("GET /api/space-thread", s.getSpaceThread) |
| 537 | mux.HandleFunc("POST /api/space-thread", s.postSpaceThread) |
| 538 | mux.HandleFunc("POST /api/admin/space-thread/reset", s.resetSpaceThreadHandler) |
| 539 | mux.HandleFunc("POST /api/instance-key/nudge", s.nudgeInstanceKey) |
| 540 | mux.HandleFunc("POST /api/admin/instance-key/reset", s.resetInstanceKeyHandler) |
| 541 | // Tiers: admin-curated member sets with their own keys (docs/community-and-tiers.md). |
| 542 | mux.HandleFunc("GET /api/tiers", s.getTiers) |
| 543 | mux.HandleFunc("POST /api/tiers", s.postTier) |
| 544 | mux.HandleFunc("DELETE /api/tiers/{id}", s.deleteTierHandler) |
| 545 | mux.HandleFunc("POST /api/tiers/{id}/members", s.postTierMember) |
| 546 | mux.HandleFunc("POST /api/tiers/{id}/remove", s.postTierRemove) |
| 547 | mux.HandleFunc("POST /api/tiers/{id}/keys", s.postTierKeys) |
| 548 | mux.HandleFunc("POST /api/tiers/{id}/nudge", s.nudgeTierKey) |
| 549 | mux.HandleFunc("POST /api/tiers/{id}/policy", s.postTierPolicy) |
| 550 | mux.HandleFunc("POST /api/tiers/{id}/show", s.postTierShow) |
| 551 | // Paid access levels (subscriptions.go): admin price + account, member |
| 552 | // subscribe/change/cancel/portal, and the provider webhook (public — its |
| 553 | // signature is the auth). Dormant when no provider is configured. |
| 554 | mux.HandleFunc("POST /api/tiers/{id}/price", s.postTierPrice) |
| 555 | mux.HandleFunc("POST /api/tiers/{id}/subscribe", s.postTierSubscribe) |
| 556 | mux.HandleFunc("POST /api/tiers/{id}/change", s.postTierChange) |
| 557 | mux.HandleFunc("POST /api/tiers/{id}/cancel-subscription", s.postTierCancelSub) |
| 558 | mux.HandleFunc("POST /api/tiers/{id}/resume", s.postTierResume) |
| 559 | mux.HandleFunc("POST /api/tiers/{id}/portal", s.postTierPortal) |
| 560 | mux.HandleFunc("POST /api/admin/billing/account", s.postBillingAccount) |
| 561 | mux.HandleFunc("GET /api/admin/billing", s.getBillingStatus) |
| 562 | mux.HandleFunc("POST /api/billing/webhook", s.stripeConnectWebhook) |
| 563 | mux.HandleFunc("POST /api/label", s.postLabel) |
| 564 | mux.HandleFunc("POST /api/label/backfill", s.postLabelBackfill) |
| 565 | mux.HandleFunc("POST /api/presence", s.postPresence) |
| 566 | mux.HandleFunc("POST /api/avatar", s.postAvatar) |
| 567 | mux.HandleFunc("POST /api/description", s.postDescription) |
| 568 | mux.HandleFunc("GET /api/nicknames", s.getNicknames) |
| 569 | mux.HandleFunc("POST /api/nicknames", s.postNicknames) |
| 570 | mux.HandleFunc("GET /api/prefs", s.getPrefs) |
| 571 | mux.HandleFunc("POST /api/prefs", s.postPrefs) |
| 572 | mux.HandleFunc("POST /api/dm-privacy", s.postDMPrivacy) |
| 573 | mux.HandleFunc("GET /api/blocks", s.getBlocks) |
| 574 | mux.HandleFunc("POST /api/blocks", s.postBlock) |
| 575 | mux.HandleFunc("DELETE /api/blocks/{id}", s.deleteBlock) |
| 576 | mux.HandleFunc("POST /api/reports", s.postReport) |
| 577 | mux.HandleFunc("GET /api/admin/reports", s.adminReports) |
| 578 | mux.HandleFunc("POST /api/admin/reports/{id}/resolve", s.resolveReportHandler) |
| 579 | mux.HandleFunc("POST /api/admin/warn", s.adminWarn) |
| 580 | mux.HandleFunc("GET /api/admin/audit", s.adminAudit) |
| 581 | mux.HandleFunc("POST /api/admin/users/{id}/ban", s.banUser) |
| 582 | mux.HandleFunc("POST /api/group-description", s.postGroupDescription) |
| 583 | mux.HandleFunc("GET /api/threads", s.getThreads) |
| 584 | mux.HandleFunc("POST /api/threads", s.postThread) |
| 585 | mux.HandleFunc("GET /api/threads/open", s.getOpenThreads) |
| 586 | mux.HandleFunc("POST /api/threads/{id}/join", s.postThreadJoin) |
| 587 | mux.HandleFunc("POST /api/threads/{id}/visibility", s.postThreadVisibility) |
| 588 | mux.HandleFunc("POST /api/threads/{id}/default", s.postThreadDefault) |
| 589 | mux.HandleFunc("POST /api/threads/{id}/members", s.postThreadMember) |
| 590 | mux.HandleFunc("POST /api/threads/{id}/name", s.postThreadName) |
| 591 | mux.HandleFunc("POST /api/threads/{id}/avatar", s.postThreadAvatar) |
| 592 | mux.HandleFunc("POST /api/threads/{id}/leave", s.postThreadLeave) |
| 593 | mux.HandleFunc("POST /api/threads/{id}/cancel-invite", s.cancelInvite) |
| 594 | mux.HandleFunc("POST /api/threads/{id}/remove", s.postThreadRemove) |
| 595 | mux.HandleFunc("POST /api/threads/{id}/hidden", s.postThreadHidden) |
| 596 | mux.HandleFunc("POST /api/threads/{id}/pinned", s.postThreadPinned) |
| 597 | mux.HandleFunc("POST /api/threads/{id}/muted", s.postThreadMuted) |
| 598 | mux.HandleFunc("POST /api/threads/{id}/close-dm", s.postCloseDM) |
| 599 | mux.HandleFunc("POST /api/threads/{id}/reopen-dm", s.postReopenDM) |
| 600 | mux.HandleFunc("POST /api/threads/{id}/read", s.postThreadRead) |
| 601 | |
| 602 | // Mini-apps (miniapps.go): scheduled "future messages" + per-thread state |
| 603 | // snapshots. Both carry only client-encrypted blobs; both are member-gated. |
| 604 | mux.HandleFunc("POST /api/schedule", s.postSchedule) |
| 605 | mux.HandleFunc("GET /api/schedule", s.getSchedules) |
| 606 | mux.HandleFunc("DELETE /api/schedule/{id}", s.deleteSchedule) |
| 607 | // The activator's due-time probe (admin-gated; queried over the instance |
| 608 | // socket at sleep time so hibernated schedules still fire on time). |
| 609 | mux.HandleFunc("GET /api/next-due", s.getNextDue) |
| 610 | mux.HandleFunc("GET /api/threads/{id}/state", s.getThreadStateHandler) |
| 611 | mux.HandleFunc("PUT /api/threads/{id}/state", s.putThreadStateHandler) |
| 612 | |
| 613 | // Connected third-party services (docs/connected-services.md): opaque, |
| 614 | // client-encrypted credential blobs keyed per member. Token-gated; the server |
| 615 | // never reads inside. |
| 616 | mux.HandleFunc("GET /api/connected", s.listConnected) |
| 617 | mux.HandleFunc("GET /api/connected/{service}", s.getConnected) |
| 618 | mux.HandleFunc("PUT /api/connected/{service}", s.putConnected) |
| 619 | mux.HandleFunc("DELETE /api/connected/{service}", s.deleteConnected) |
| 620 | // OAuth connect (docs/connected-services.md): public config for the browser to |
| 621 | // start a PKCE flow, and the redirect landing that relays the code back. |
| 622 | mux.HandleFunc("GET /api/oauth/config", s.oauthConfig) |
| 623 | mux.HandleFunc("GET /oauth/{service}/callback", s.oauthCallbackPage) |
| 624 | |
| 625 | // Encrypted attachments: bytes are E2E-encrypted in the browser; the server |
| 626 | // stores/serves opaque blobs only. Both ends are token-gated. |
| 627 | mux.HandleFunc("POST /api/upload", s.uploadBlob) |
| 628 | mux.HandleFunc("GET /api/blob/{id}", s.getBlobHandler) |
| 629 | |
| 630 | // Link previews: the server fetches a posted URL to build an OpenGraph card, |
| 631 | // caches it, and serves cached results immediately (refreshing stale ones). |
| 632 | mux.HandleFunc("GET /api/unfurl", s.unfurl) |
| 633 | |
| 634 | // Key-invites (invite redesign): server stores a client-wrapped key it can't |
| 635 | // open; claiming mints a device token. See docs/invite-redesign.md. |
| 636 | mux.HandleFunc("GET /api/key-invite/{id}", s.getKeyInvite) |
| 637 | mux.HandleFunc("POST /api/key-invite/{id}/claim", s.claimKeyInvite) |
| 638 | mux.HandleFunc("POST /api/key-invite/{id}/adopt", s.adoptKeyInvite) |
| 639 | mux.HandleFunc("POST /api/admin/key-invites", s.createKeyInvite) |
| 640 | mux.HandleFunc("GET /api/admin/tiers", s.adminTiers) |
| 641 | mux.HandleFunc("GET /api/admin/users", s.listUsers) |
| 642 | mux.HandleFunc("POST /api/admin/users/{id}/remove", s.removeUser) |
| 643 | mux.HandleFunc("POST /api/admin/users/{id}/label", s.renameUser) |
| 644 | mux.HandleFunc("GET /api/admin/bots/{id}/config", s.getAdminBotConfig) |
| 645 | mux.HandleFunc("POST /api/admin/bots/{id}/config", s.setAdminBotConfig) |
| 646 | // A member can mint a fresh invite for their own account (add a device). |
| 647 | mux.HandleFunc("POST /api/device-invites", s.createDeviceInvite) |
| 648 | // A member can invite a new person straight into a DM (gated by an admin setting). |
| 649 | mux.HandleFunc("POST /api/invites", s.postUserInvite) |
| 650 | |
| 651 | // Group name (public read so the page/manifest can show it; admin write) |
| 652 | mux.HandleFunc("GET /api/group", s.getGroup) |
| 653 | // Server avatar: per-instance branding photo. Public read (shown in onboarding, |
| 654 | // the home Save-passkey card, and native add-chat — all before any key exists); |
| 655 | // admin write/clear. Served in the clear like the group name (see getServerAvatar). |
| 656 | mux.HandleFunc("GET /api/server-avatar", s.getServerAvatar) |
| 657 | mux.HandleFunc("POST /api/admin/server-avatar", s.setServerAvatar) |
| 658 | mux.HandleFunc("DELETE /api/admin/server-avatar", s.deleteServerAvatar) |
| 659 | // Frontend build version — clients poll this on returning to the app and reload |
| 660 | // if it changed (auto-update). No auth: it's just a build hash. |
| 661 | mux.HandleFunc("GET /api/version", s.getVersion) |
| 662 | mux.HandleFunc("GET /api/update-prefs", s.getUpdatePrefs) |
| 663 | mux.HandleFunc("GET /api/changelog", s.getChangelog) |
| 664 | // The mini-app authoring guide. Static documentation compiled into the |
| 665 | // binary — never instance data — so, like /api/version, it isn't token-gated: |
| 666 | // the whole point is that an external LLM can be pointed straight at it. |
| 667 | mux.HandleFunc("GET /api/app-guide", s.getAppGuide) |
| 668 | mux.HandleFunc("GET /api/member-app-guide", s.getMemberAppGuide) |
| 669 | mux.HandleFunc("GET /api/check-app.mjs", s.getAppChecker) |
| 670 | mux.HandleFunc("POST /api/admin/group", s.setGroup) |
| 671 | // Sealed branding (docs/no-plaintext.md): the client-sealed branding set |
| 672 | // and its reversal. Admin-gated; the ciphertext is produced client-side. |
| 673 | mux.HandleFunc("POST /api/admin/branding/seal", s.sealBranding) |
| 674 | mux.HandleFunc("POST /api/admin/branding/unseal", s.unsealBranding) |
| 675 | |
| 676 | // Admin API (requires admin token) |
| 677 | mux.HandleFunc("GET /api/admin/settings", s.getSettings) |
| 678 | mux.HandleFunc("POST /api/admin/settings", s.setSettings) |
| 679 | |
| 680 | // Web Push (VAPID self-generated; pushed payload is ciphertext, decrypted in the SW) |
| 681 | mux.HandleFunc("GET /api/push/vapid", s.getVAPID) |
| 682 | mux.HandleFunc("POST /api/push/subscribe", s.subscribePush) |
| 683 | mux.HandleFunc("POST /api/push/unsubscribe", s.unsubscribePush) |
| 684 | mux.HandleFunc("POST /api/admin/test-push", s.testPush) |
| 685 | |
| 686 | // PWA: the service worker must be served from the root scope; manifest for install |
| 687 | mux.HandleFunc("GET /sw.js", s.serveSW) |
| 688 | mux.HandleFunc("GET /manifest.webmanifest", s.serveManifest) |
| 689 | // Universal links: lets invite links on this instance's domain open straight |
| 690 | // into the iOS app when it's installed (every instance is its own domain, and |
| 691 | // every instance is this same binary, so each serves its own association file). |
| 692 | mux.HandleFunc("GET /.well-known/apple-app-site-association", serveAASA) |
| 693 | |
| 694 | return securityHeaders(mux) |
| 695 | } |
| 696 | |
| 697 | // securityHeaders adds defense-in-depth headers to every response. The page |
| 698 | // Content-Security-Policy needs a per-request nonce, so it's set in servePage; |
| 699 | // these are the static ones that apply everywhere (including the blob download, |
| 700 | // where nosniff stops a mistyped blob being sniffed as HTML). |
| 701 | func securityHeaders(next http.Handler) http.Handler { |
| 702 | return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
| 703 | h := w.Header() |
| 704 | h.Set("X-Content-Type-Options", "nosniff") |
| 705 | h.Set("X-Frame-Options", "DENY") |
| 706 | h.Set("Referrer-Policy", "no-referrer") |
| 707 | // Ignored by browsers over plain HTTP (e.g. local dev); applies in prod |
| 708 | // where every instance is served over TLS. |
| 709 | h.Set("Strict-Transport-Security", "max-age=31536000") |
| 710 | next.ServeHTTP(w, r) |
| 711 | }) |
| 712 | } |
| 713 | |
| 714 | // cspNonce returns a fresh per-response nonce for the pages' inline <script> |
| 715 | // tags, so the CSP can allow exactly those and reject any injected script. |
| 716 | func cspNonce() string { |
| 717 | var b [16]byte |
| 718 | if _, err := rand.Read(b[:]); err != nil { |
| 719 | return "" // fail closed: no inline script will match an empty nonce |
| 720 | } |
| 721 | return base64.StdEncoding.EncodeToString(b[:]) |
| 722 | } |
| 723 | |
| 724 | // ---- pages -------------------------------------------------------------- |
| 725 | |
| 726 | func loadPages() (map[string][]byte, error) { |
| 727 | pages := map[string][]byte{} |
| 728 | for _, name := range []string{"index.html", "admin.html", "join.html"} { |
| 729 | b, err := webFS.ReadFile("web/pages/" + name) |
| 730 | if err != nil { |
| 731 | return nil, err |
| 732 | } |
| 733 | pages[name] = b |
| 734 | } |
| 735 | return pages, nil |
| 736 | } |
| 737 | |
| 738 | // requestBase reconstructs the external scheme+host (e.g. "https://chat.paulca.com") |
| 739 | // as the browser reached us. The router terminates TLS and proxies over a unix |
| 740 | // socket, so the real scheme rides in X-Forwarded-Proto (SetXForwarded, router.go); |
| 741 | // prod is always TLS, so default to https when unproxied. |
| 742 | func requestBase(r *http.Request) string { |
| 743 | scheme := "https" |
| 744 | if xfp := r.Header.Get("X-Forwarded-Proto"); xfp != "" { |
| 745 | scheme = xfp |
| 746 | } else if r.TLS == nil { |
| 747 | scheme = "http" |
| 748 | } |
| 749 | return scheme + "://" + r.Host |
| 750 | } |
| 751 | |
| 752 | func (s *Server) servePage(name string) http.HandlerFunc { |
| 753 | return func(w http.ResponseWriter, r *http.Request) { |
| 754 | // "GET /" matches everything; only the exact root serves the chat page. |
| 755 | if name == "index.html" && r.URL.Path != "/" { |
| 756 | http.NotFound(w, r) |
| 757 | return |
| 758 | } |
| 759 | // A per-request nonce whitelists exactly the pages' own inline <script> |
| 760 | // blocks, so an injected inline script (the highest-value attack here — it |
| 761 | // could read the private key out of localStorage) is blocked. Third-party |
| 762 | // image/frame sources are limited to what the app actually loads (preview |
| 763 | // images over https, YouTube's no-cookie embed); everything else is 'self'. |
| 764 | nonce := cspNonce() |
| 765 | // The fetch service (docs/fetch.md) is one more named connect-src host, present |
| 766 | // only when this instance opts in — img-src's blanket https: already |
| 767 | // admits its proxied card images. |
| 768 | fetchSrc := "" |
| 769 | if s.fetchURL != "" { |
| 770 | fetchSrc = " " + s.fetchURL |
| 771 | } |
| 772 | w.Header().Set("Content-Security-Policy", |
| 773 | "default-src 'self'; "+ |
| 774 | "script-src 'self' 'nonce-"+nonce+"'; "+ |
| 775 | "style-src 'self' 'unsafe-inline'; "+ |
| 776 | "img-src 'self' data: blob: https:; "+ |
| 777 | // Video/audio play from client-decrypted blob: URLs (E2E — the server |
| 778 | // only holds ciphertext), so media-src must allow blob: or the |
| 779 | // <video> is refused. Without this it falls back to default-src 'self'. |
| 780 | "media-src 'self' blob:; "+ |
| 781 | // *.giphy.com is the /gif app's CLIENT-side doorway (hostBridge.gif in |
| 782 | // shell.js): search + GIF download happen in the browser, so the server |
| 783 | // never sees the query or the pick — the deliberate, disclosed sibling |
| 784 | // of the unfurl trade-off. The home origin admits exactly one call: the |
| 785 | // enrolment completion poll (backup.js startEnrolPoll), which sends only |
| 786 | // the client-random nonce. Keep connect-src pinned to named hosts. |
| 787 | "connect-src 'self' https://*.giphy.com "+s.homeOrigin+fetchSrc+"; "+ |
| 788 | // 'self' admits exactly one same-origin frame: /app-sandbox, the |
| 789 | // opaque-origin cage member apps run in (memberapps.go). |
| 790 | "frame-src 'self' https://www.youtube-nocookie.com; "+ |
| 791 | "object-src 'none'; base-uri 'none'; form-action 'self'; frame-ancestors 'none'") |
| 792 | w.Header().Set("Content-Type", "text/html; charset=utf-8") |
| 793 | // Inject the configurable group name (HTML-escaped — it's admin-set) and the |
| 794 | // build version (so the page knows which frontend it loaded — see /api/version). |
| 795 | page := strings.ReplaceAll(string(s.pages[name]), "__GROUP_NAME__", html.EscapeString(s.db.getGroupName())) |
| 796 | page = strings.ReplaceAll(page, "__APP_VERSION__", s.version) |
| 797 | // Whether ordinary members may invite people (gates the invite UI; the server |
| 798 | // enforces it regardless). Injected so the client needs no extra round trip. |
| 799 | page = strings.ReplaceAll(page, "__USER_INVITES__", boolStr(s.db.usersCanInvite())) |
| 800 | // Per-instance feature gates (same deal: hide the entry points here, the |
| 801 | // gated endpoints enforce). |
| 802 | page = strings.ReplaceAll(page, "__ENABLE_AI__", boolStr(s.db.aiEnabled())) |
| 803 | page = strings.ReplaceAll(page, "__ENABLE_BOTS__", boolStr(s.db.botsEnabled())) |
| 804 | page = strings.ReplaceAll(page, "__ENABLE_APPS__", boolStr(s.db.appsEnabled())) |
| 805 | page = strings.ReplaceAll(page, "__ENABLE_MEMBER_APPS__", boolStr(s.db.memberAppsEnabled())) |
| 806 | // Space-install policy (client-enforced; see db.spaceInstallsAdmins). |
| 807 | page = strings.ReplaceAll(page, "__SPACE_INSTALLS_ADMINS__", boolStr(s.db.spaceInstallsAdmins())) |
| 808 | // The welcome page's "Get the app" destination; empty hides the button. |
| 809 | page = strings.ReplaceAll(page, "__APP_STORE_URL__", html.EscapeString(s.appStoreURL)) |
| 810 | // The home server the chat page enrols into for passkey backup. |
| 811 | page = strings.ReplaceAll(page, "__HOME_ORIGIN__", html.EscapeString(s.homeOrigin)) |
| 812 | page = strings.ReplaceAll(page, "__FETCH_URL__", html.EscapeString(s.fetchURL)) |
| 813 | // The provisioner-pushed plan flag ("free"/"paid"; empty when self-hosted) |
| 814 | // — gates the space menu's Upgrade entry, enforced by nothing here: the |
| 815 | // checkout itself lives on the home server. |
| 816 | page = strings.ReplaceAll(page, "__ENTITLEMENT__", html.EscapeString(s.entitlement)) |
| 817 | // Link-preview (OpenGraph) fields for the join page. Absolute URLs, since |
| 818 | // crawlers fetch with no base. The image is the server branding avatar when |
| 819 | // set, else the app logo — both plaintext branding, never user content, so |
| 820 | // this leaks nothing beyond what the group name already does. |
| 821 | if name == "join.html" { |
| 822 | base := requestBase(r) |
| 823 | ogImage := base + "/static/icon-512.png" |
| 824 | // A sealed avatar is ciphertext — crawlers can't render it, so OG |
| 825 | // cards keep the app logo (the group name is likewise the default). |
| 826 | if _, mime, _, hasAvatar := s.db.getInstanceAvatar(); hasAvatar && mime != sealedAvatarMime { |
| 827 | ogImage = base + "/api/server-avatar" |
| 828 | } |
| 829 | page = strings.ReplaceAll(page, "__OG_URL__", html.EscapeString(base+r.URL.EscapedPath())) |
| 830 | page = strings.ReplaceAll(page, "__OG_IMAGE__", html.EscapeString(ogImage)) |
| 831 | } |
| 832 | page = strings.ReplaceAll(page, "__CSP_NONCE__", nonce) |
| 833 | w.Write([]byte(page)) |
| 834 | } |
| 835 | } |
| 836 | |
| 837 | // The home server that hosts passkey backup enrolment when LCHAT_HOME_ORIGIN is |
| 838 | // unset. See the enrolment cross-origin contract (web/static/backup.js). |
| 839 | const defaultHomeOrigin = "https://home.elevenmessenger.com" |
| 840 | |
| 841 | // The apps this deployment's instances associate with (team + bundle ids) — |
| 842 | // public by definition (they ship in every AASA file and in the apps |
| 843 | // themselves). The Mac id is the server half of Mac universal links |
| 844 | // (docs/native-onboarding.md E.1/E.2, issue #1376): inert until the Mac app |
| 845 | // ships its applinks entitlement (E.2), at which point /join links open the |
| 846 | // app directly instead of riding the custom-scheme handoff. |
| 847 | const appleAppID = "J5NDF5PCD8.com.elevenmessenger.messenger" |
| 848 | const appleMacAppID = "J5NDF5PCD8.com.elevenmessenger.messenger.mac" |
| 849 | |
| 850 | // serveAASA answers Apple's app-site-association probe. Apple's CDN fetches it |
| 851 | // when the app installs/updates; matching /join/* links then open in the app |
| 852 | // instead of Safari, with the URL (fragment included) handed to the app. Public, |
| 853 | // unauthenticated, and identical on every instance by design. |
| 854 | func serveAASA(w http.ResponseWriter, r *http.Request) { |
| 855 | w.Header().Set("Content-Type", "application/json") |
| 856 | fmt.Fprintf(w, `{"applinks":{"details":[{"appIDs":[%q,%q],"components":[{"/":"/join/*"}]}]}}`, appleAppID, appleMacAppID) |
| 857 | } |
| 858 | |
| 859 | // frontendVersion is a short hash of the embedded frontend (web/), computed once at |
| 860 | // startup. It changes whenever any UI file changes, so a redeploy that ships new |
| 861 | // frontend code yields a new version — clients notice and reload (see getVersion + |
| 862 | // the visibility check in chat.js). A server-only change leaves it unchanged. |
| 863 | func frontendVersion() string { |
| 864 | h := sha256.New() |
| 865 | _ = fs.WalkDir(webFS, "web", func(p string, d fs.DirEntry, err error) error { |
| 866 | if err != nil || d.IsDir() { |
| 867 | return nil |
| 868 | } |
| 869 | b, e := webFS.ReadFile(p) |
| 870 | if e != nil { |
| 871 | return nil |
| 872 | } |
| 873 | h.Write([]byte(p)) |
| 874 | h.Write(b) |
| 875 | return nil |
| 876 | }) |
| 877 | return fmt.Sprintf("%x", h.Sum(nil))[:12] |
| 878 | } |
| 879 | |
| 880 | // getVersion returns the current frontend build hash (clients poll it to |
| 881 | // auto-reload) plus the binary build id. `version` drives the frontend reload; |
| 882 | // `build` is the compiled-in id `lchat deploy --version` health-checks against, so |
| 883 | // a deploy can confirm the intended binary is actually the one now serving. |
| 884 | func (s *Server) getVersion(w http.ResponseWriter, r *http.Request) { |
| 885 | writeJSON(w, http.StatusOK, map[string]any{"version": s.version, "build": buildVersion}) |
| 886 | } |
| 887 | |
| 888 | // ChangelogEntry is one embedded release note (see the changelogFS comment). |
| 889 | // The text is operator-authored notes about the app itself — never user |
| 890 | // content — so, like roster labels, it lives in clear. |
| 891 | type ChangelogEntry struct { |
| 892 | ID string `json:"id"` // filename without .md, e.g. 2026-07-01-helpers |
| 893 | Text string `json:"text"` // the note, posted verbatim by the announcer |
| 894 | } |
| 895 | |
| 896 | // loadChangelog reads the embedded entries once at startup, in filename order |
| 897 | // (date-prefixed names, so oldest first). |
| 898 | func loadChangelog() []ChangelogEntry { |
| 899 | out := []ChangelogEntry{} |
| 900 | files, _ := changelogFS.ReadDir("changelog") |
| 901 | for _, f := range files { // ReadDir returns names sorted |
| 902 | b, err := changelogFS.ReadFile("changelog/" + f.Name()) |
| 903 | if err != nil { |
| 904 | continue |
| 905 | } |
| 906 | text := strings.TrimSpace(string(b)) |
| 907 | if text == "" { |
| 908 | continue |
| 909 | } |
| 910 | out = append(out, ChangelogEntry{ID: strings.TrimSuffix(f.Name(), ".md"), Text: text}) |
| 911 | } |
| 912 | return out |
| 913 | } |
| 914 | |
| 915 | // getChangelog returns the embedded release notes. Token-gated like every data |
| 916 | // endpoint; the announcer bot reads it with its own device token. |
| 917 | func (s *Server) getChangelog(w http.ResponseWriter, r *http.Request) { |
| 918 | if !s.tokenOK(r.URL.Query().Get("token")) { |
| 919 | httpError(w, http.StatusForbidden, "not a member") |
| 920 | return |
| 921 | } |
| 922 | writeJSON(w, http.StatusOK, map[string]any{"entries": s.changelog}) |
| 923 | } |
| 924 | |
| 925 | // getAppGuide serves the embedded mini-app authoring guide as markdown. See the |
| 926 | // appGuideFS comment for why this endpoint is deliberately public. |
| 927 | func (s *Server) getAppGuide(w http.ResponseWriter, r *http.Request) { |
| 928 | b, err := appGuideFS.ReadFile("docs/building-apps.md") |
| 929 | if err != nil { |
| 930 | httpError(w, http.StatusInternalServerError, "guide unavailable") |
| 931 | return |
| 932 | } |
| 933 | w.Header().Set("Content-Type", "text/markdown; charset=utf-8") |
| 934 | w.Write(b) |
| 935 | } |
| 936 | |
| 937 | // getMemberAppGuide serves the sandboxed-tier authoring guide — what the |
| 938 | // assistant bot's create_app tool builds against (it fetches this exact |
| 939 | // endpoint, so bot and instance can never disagree on the rules), and what a |
| 940 | // member points an outside LLM at. Public like /api/app-guide. |
| 941 | func (s *Server) getMemberAppGuide(w http.ResponseWriter, r *http.Request) { |
| 942 | // Apps off — or just member-built apps off — reads as "no guide": the |
| 943 | // sidecar already treats a failed fetch as app building disabled, so a 404 |
| 944 | // switches its builder off with no new protocol between them. |
| 945 | if !s.db.appsEnabled() || !s.db.memberAppsEnabled() { |
| 946 | http.NotFound(w, r) |
| 947 | return |
| 948 | } |
| 949 | b, err := appGuideFS.ReadFile("docs/building-member-apps.md") |
| 950 | if err != nil { |
| 951 | httpError(w, http.StatusInternalServerError, "guide unavailable") |
| 952 | return |
| 953 | } |
| 954 | w.Header().Set("Content-Type", "text/markdown; charset=utf-8") |
| 955 | w.Write(b) |
| 956 | } |
| 957 | |
| 958 | // getAppChecker serves the embedded static app checker, so an author following |
| 959 | // the guide can run it without a repo checkout (curl -O, then node). Un-gated |
| 960 | // for the same reason as the guide: static tooling, not instance data. |
| 961 | func (s *Server) getAppChecker(w http.ResponseWriter, r *http.Request) { |
| 962 | b, err := appGuideFS.ReadFile("tools/check-app.mjs") |
| 963 | if err != nil { |
| 964 | httpError(w, http.StatusInternalServerError, "checker unavailable") |
| 965 | return |
| 966 | } |
| 967 | w.Header().Set("Content-Type", "text/javascript; charset=utf-8") |
| 968 | w.Write(b) |
| 969 | } |
| 970 | |
| 971 | // ---- chat API ----------------------------------------------------------- |
| 972 | |
| 973 | func (s *Server) getMessages(w http.ResponseWriter, r *http.Request) { |
| 974 | token := r.URL.Query().Get("token") |
| 975 | if !s.tokenOK(token) { |
| 976 | httpError(w, http.StatusForbidden, "invalid invite") |
| 977 | return |
| 978 | } |
| 979 | q := r.URL.Query() |
| 980 | // Messages are per-thread; you must be a member of the thread you ask for. |
| 981 | threadID := q.Get("thread") |
| 982 | userID, _ := s.db.deviceTokenUser(token) |
| 983 | if threadID == "" || !s.db.threadMember(threadID, userID) { |
| 984 | httpError(w, http.StatusForbidden, "not a thread member") |
| 985 | return |
| 986 | } |
| 987 | limit := 100 |
| 988 | if n, err := strconv.Atoi(q.Get("limit")); err == nil && n > 0 { |
| 989 | limit = n |
| 990 | } |
| 991 | if limit > 200 { |
| 992 | limit = 200 |
| 993 | } |
| 994 | // `before` paginates older history (id < before); otherwise `after` returns |
| 995 | // the page after a cursor, or the most recent `limit` when after is 0. |
| 996 | var msgs []Message |
| 997 | var err error |
| 998 | if b := q.Get("before"); b != "" { |
| 999 | before, _ := strconv.ParseInt(b, 10, 64) |
| 1000 | msgs, err = s.db.messagesBefore(threadID, before, limit) |
| 1001 | } else { |
| 1002 | after, _ := strconv.ParseInt(q.Get("after"), 10, 64) |
| 1003 | msgs, err = s.db.messagesAfter(threadID, after, limit) |
| 1004 | } |
| 1005 | if err != nil { |
| 1006 | httpError(w, http.StatusInternalServerError, "db error") |
| 1007 | return |
| 1008 | } |
| 1009 | writeJSON(w, http.StatusOK, map[string]any{"messages": msgs}) |
| 1010 | } |
| 1011 | |
| 1012 | // postMessage is a non-WebSocket doorway to the exact same path as the "msg" |
| 1013 | // frame in handleWS: a caller that holds a valid invite token POSTs an already |
| 1014 | // AES-GCM-encrypted ciphertext blob, and we store + broadcast + push it. It lets |
| 1015 | // bots, cron jobs and webhooks post without holding a WebSocket open. |
| 1016 | // |
| 1017 | // The end-to-end property is preserved precisely because the caller encrypts: |
| 1018 | // the group key never reaches the server, and (as everywhere else) we store only |
| 1019 | // the opaque blob and the author's hashed token — never plaintext. The companion |
| 1020 | // `lchat-post` helper turns plaintext into the blob in the *caller's* trust |
| 1021 | // domain. |
| 1022 | func (s *Server) postMessage(w http.ResponseWriter, r *http.Request) { |
| 1023 | token := r.URL.Query().Get("token") |
| 1024 | if !s.tokenOK(token) { |
| 1025 | httpError(w, http.StatusForbidden, "invalid invite") |
| 1026 | return |
| 1027 | } |
| 1028 | // Cap the body before decoding so a valid-token holder can't force a huge |
| 1029 | // allocation — the length check below would fire too late on its own. Mirrors |
| 1030 | // uploadBlob's MaxBytesReader and handleWS's SetReadLimit. |
| 1031 | r.Body = http.MaxBytesReader(w, r.Body, maxBlobBytes+1024) |
| 1032 | var body struct { |
| 1033 | ThreadID string `json:"thread_id"` |
| 1034 | Blob string `json:"blob"` |
| 1035 | } |
| 1036 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1037 | httpError(w, http.StatusBadRequest, "bad request") |
| 1038 | return |
| 1039 | } |
| 1040 | // Same guards as the WebSocket "msg" case: non-empty, within the blob cap. |
| 1041 | if body.Blob == "" || len(body.Blob) > maxBlobBytes { |
| 1042 | httpError(w, http.StatusBadRequest, "missing or oversized blob") |
| 1043 | return |
| 1044 | } |
| 1045 | // Thread-scoped like every other write: the poster must be a member of the |
| 1046 | // thread (a script posts only where its user belongs). Same gate as the |
| 1047 | // WebSocket "msg" case. |
| 1048 | userID, _ := s.db.deviceTokenUser(token) |
| 1049 | if body.ThreadID == "" || !s.db.threadMember(body.ThreadID, userID) { |
| 1050 | httpError(w, http.StatusForbidden, "not a member of that thread") |
| 1051 | return |
| 1052 | } |
| 1053 | // Same closed-DM gate as the WebSocket "msg" case (issue #578). |
| 1054 | if closed, _ := s.db.dmClosed(body.ThreadID); closed { |
| 1055 | httpError(w, http.StatusForbidden, "conversation closed") |
| 1056 | return |
| 1057 | } |
| 1058 | // Same content-blind message brake as the WebSocket case (issue #578). |
| 1059 | if s.db.userRole(userID) != "admin" && !s.brake().messages.allow(userID) { |
| 1060 | httpError(w, http.StatusTooManyRequests, "sending too fast — give it a moment") |
| 1061 | return |
| 1062 | } |
| 1063 | m, err := s.db.insertMessage(body.ThreadID, body.Blob, userID) |
| 1064 | if err != nil { |
| 1065 | log.Println("insert message:", err) |
| 1066 | httpError(w, http.StatusInternalServerError, "db error") |
| 1067 | return |
| 1068 | } |
| 1069 | out, _ := json.Marshal(wsOut{Type: "msg", ThreadID: body.ThreadID, ID: m.ID, CreatedAt: m.CreatedAt, Blob: m.Blob}) |
| 1070 | s.broadcastToThread(body.ThreadID, out) |
| 1071 | // Notify the thread's other members (not the poster), best-effort, async. |
| 1072 | go s.pushNewMessage(m.Blob, body.ThreadID, token, m.ID, m.CreatedAt) |
| 1073 | writeJSON(w, http.StatusOK, m) |
| 1074 | } |
| 1075 | |
| 1076 | // brake returns the rate-limit set, creating it on first use — test servers |
| 1077 | // build Server directly and must brake identically to production. |
| 1078 | func (s *Server) brake() *modBrakes { |
| 1079 | if s.brakes == nil { |
| 1080 | s.brakes = newModBrakes() |
| 1081 | } |
| 1082 | return s.brakes |
| 1083 | } |
| 1084 | |
| 1085 | // tokenOK reports whether a token is a valid participant credential: either a |
| 1086 | // current non-revoked invite (legacy) or a device token (invite redesign). |
| 1087 | func (s *Server) tokenOK(token string) bool { |
| 1088 | if token == "" { |
| 1089 | return false |
| 1090 | } |
| 1091 | return s.db.deviceTokenValid(token) |
| 1092 | } |
| 1093 | |
| 1094 | // ---- threads & roster (see docs/threads-and-dms.md) --------------------- |
| 1095 | |
| 1096 | // setPubkey registers the caller's ECDH public key in the roster (on first join, |
| 1097 | // or after a key rotation). Members wrap thread keys to this. |
| 1098 | func (s *Server) setPubkey(w http.ResponseWriter, r *http.Request) { |
| 1099 | var body struct { |
| 1100 | Token string `json:"token"` |
| 1101 | PublicKey string `json:"public_key"` |
| 1102 | // Key transparency (#573): HMAC of PublicKey under the invite secret T, |
| 1103 | // so a T-holder can verify the roster key. Opaque to us; stored beside |
| 1104 | // the key and served in the roster. Absent for pre-KT / add-device. |
| 1105 | BindMac string `json:"bind_mac"` |
| 1106 | } |
| 1107 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1108 | httpError(w, http.StatusBadRequest, "bad request") |
| 1109 | return |
| 1110 | } |
| 1111 | if !s.tokenOK(body.Token) { |
| 1112 | httpError(w, http.StatusForbidden, "not a member") |
| 1113 | return |
| 1114 | } |
| 1115 | if len(body.BindMac) > 200 { |
| 1116 | httpError(w, http.StatusBadRequest, "bad bind mac") |
| 1117 | return |
| 1118 | } |
| 1119 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1120 | if !ok { |
| 1121 | httpError(w, http.StatusForbidden, "no user for token") |
| 1122 | return |
| 1123 | } |
| 1124 | if body.PublicKey == "" || len(body.PublicKey) > 500 { |
| 1125 | httpError(w, http.StatusBadRequest, "bad public key") |
| 1126 | return |
| 1127 | } |
| 1128 | // A user's public key is set once, on first join. Refuse to overwrite it with a |
| 1129 | // DIFFERENT key — that would orphan every thread wrapped to the old key (e.g. an |
| 1130 | // admin "device link" that made a new device generate its own keypair). Adding a |
| 1131 | // device ships the SAME keypair, so re-registering the identical key is fine. |
| 1132 | // A banned key can't re-register (issue #578) — this one gate covers every |
| 1133 | // invite path, because a member only becomes real once their key does. |
| 1134 | if s.db.keyBanned(body.PublicKey) { |
| 1135 | httpError(w, http.StatusForbidden, "not a member") |
| 1136 | return |
| 1137 | } |
| 1138 | firstKey := s.db.userPublicKey(uid) == "" |
| 1139 | if cur := s.db.userPublicKey(uid); cur != "" && cur != body.PublicKey { |
| 1140 | httpError(w, http.StatusConflict, "public key already registered") |
| 1141 | return |
| 1142 | } |
| 1143 | if err := s.db.setUserPublicKey(uid, body.PublicKey, body.BindMac); err != nil { |
| 1144 | httpError(w, http.StatusInternalServerError, "db error") |
| 1145 | return |
| 1146 | } |
| 1147 | // A fresh joiner is only NOW a keyed member — tell open tabs so the inviter's |
| 1148 | // pending-invite card swaps to the live DM (pendingInvitee needs a public key |
| 1149 | // to clear). Firing at claim time raced this POST and left the card stuck. |
| 1150 | if firstKey { |
| 1151 | out, _ := json.Marshal(map[string]any{"type": "joined", "user_id": uid}) |
| 1152 | s.hub.broadcast <- outbound{data: out} |
| 1153 | // A cohort joiner is only NOW wrappable-to: prod each of their levels' |
| 1154 | // key holders (targeted, keyless). The holder backfill in loadTiers |
| 1155 | // self-heals later regardless; this makes the common case immediate. |
| 1156 | for _, tid := range s.db.userTiersNeedingKeys(uid) { |
| 1157 | s.prodTierHolders(tid, uid) |
| 1158 | } |
| 1159 | } |
| 1160 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1161 | } |
| 1162 | |
| 1163 | // getRoster returns the caller's connections — themselves plus everyone they |
| 1164 | // already share a thread with (a DM or a group). It is deliberately NOT the whole |
| 1165 | // instance: you reach new people by inviting them, not by browsing a directory of |
| 1166 | // everyone on the server. (A legacy token with no user gets an empty roster.) |
| 1167 | func (s *Server) getRoster(w http.ResponseWriter, r *http.Request) { |
| 1168 | token := r.URL.Query().Get("token") |
| 1169 | if !s.tokenOK(token) { |
| 1170 | httpError(w, http.StatusForbidden, "not a member") |
| 1171 | return |
| 1172 | } |
| 1173 | uid, ok := s.db.deviceTokenUser(token) |
| 1174 | if !ok { |
| 1175 | writeJSON(w, http.StatusOK, map[string]any{"roster": []RosterEntry{}}) |
| 1176 | return |
| 1177 | } |
| 1178 | // Admin-vetted bots (agents in the Helpers catalog) see the full joined |
| 1179 | // roster, not just their connections: Eleven can't welcome a member it |
| 1180 | // can't see. This widens only what a *vetted bot* sees — people still get |
| 1181 | // connections-only, and an unvetted agent is treated like anyone else. |
| 1182 | var entries []RosterEntry |
| 1183 | var err error |
| 1184 | if s.db.isVettedAgent(uid) { |
| 1185 | entries, err = s.db.roster() |
| 1186 | } else { |
| 1187 | entries, err = s.db.connections(uid) |
| 1188 | } |
| 1189 | if err != nil { |
| 1190 | httpError(w, http.StatusInternalServerError, "db error") |
| 1191 | return |
| 1192 | } |
| 1193 | s.stampPresence(entries) |
| 1194 | writeJSON(w, http.StatusOK, map[string]any{"roster": entries}) |
| 1195 | } |
| 1196 | |
| 1197 | // getMe reports facts about the caller's own account — how many devices they |
| 1198 | // have signed in (so the client can warn before signing out the last one, which |
| 1199 | // loses their keys, and the chats encrypted to them, for good), and for admins |
| 1200 | // whether they are the SOLE admin (so the home server's client can refuse to |
| 1201 | // drop the last recovery copy of the only admin key without a teardown). |
| 1202 | // |
| 1203 | // The home page runs on a different origin, so this one endpoint answers CORS |
| 1204 | // for exactly that origin — the response reveals nothing without a valid device |
| 1205 | // token, and only the caller's own facts with one. |
| 1206 | func (s *Server) getMe(w http.ResponseWriter, r *http.Request) { |
| 1207 | if o := r.Header.Get("Origin"); o != "" && o == s.homeOrigin { |
| 1208 | w.Header().Set("Access-Control-Allow-Origin", o) |
| 1209 | w.Header().Set("Vary", "Origin") |
| 1210 | } |
| 1211 | token := r.URL.Query().Get("token") |
| 1212 | if !s.tokenOK(token) { |
| 1213 | httpError(w, http.StatusForbidden, "not a member") |
| 1214 | return |
| 1215 | } |
| 1216 | uid, ok := s.db.deviceTokenUser(token) |
| 1217 | if !ok { |
| 1218 | writeJSON(w, http.StatusOK, map[string]any{"device_count": 0}) |
| 1219 | return |
| 1220 | } |
| 1221 | pinned, _ := s.db.userPresenceInfo(uid) |
| 1222 | me := map[string]any{ |
| 1223 | "user_id": uid, |
| 1224 | "device_count": s.db.deviceCount(uid), |
| 1225 | "role": s.db.userRole(uid), |
| 1226 | // The caller's pinned Away flag (not the effective state) — what the |
| 1227 | // profile sheet's toggle reflects. |
| 1228 | "away": pinned == presenceAway, |
| 1229 | // setup_complete gates the first-run setup conversation. It's instance |
| 1230 | // state (not a secret), but only an admin's client acts on it. |
| 1231 | "setup_complete": s.db.setupComplete(), |
| 1232 | } |
| 1233 | // Only admins learn the admin headcount fact — members have no use for it. |
| 1234 | if me["role"] == "admin" { |
| 1235 | me["sole_admin"] = s.db.adminCount() == 1 |
| 1236 | } |
| 1237 | // DM privacy (issue #578): what the caller's own settings toggle reflects. |
| 1238 | me["dm_privacy"] = s.db.userDMPrivacy(uid) |
| 1239 | writeJSON(w, http.StatusOK, me) |
| 1240 | } |
| 1241 | |
| 1242 | // signout revokes the caller's own device token (sign out on this device) and drops |
| 1243 | // its push subscriptions. Other devices keep working; the key survives on them. |
| 1244 | func (s *Server) signout(w http.ResponseWriter, r *http.Request) { |
| 1245 | var body struct { |
| 1246 | Token string `json:"token"` |
| 1247 | } |
| 1248 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1249 | httpError(w, http.StatusBadRequest, "bad request") |
| 1250 | return |
| 1251 | } |
| 1252 | // Token-gate like every data endpoint; an unknown token has nothing to revoke, so |
| 1253 | // treat it as already signed out (idempotent) rather than acting on it. |
| 1254 | if !s.tokenOK(body.Token) { |
| 1255 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1256 | return |
| 1257 | } |
| 1258 | _ = s.db.deleteDeviceToken(body.Token) |
| 1259 | _ = s.db.deleteSubscriptionsForToken(body.Token) |
| 1260 | _ = s.db.deleteAPNsTokensForToken(body.Token) |
| 1261 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1262 | } |
| 1263 | |
| 1264 | // getThreads returns the caller's threads, each with their wrapped key + members. |
| 1265 | func (s *Server) getThreads(w http.ResponseWriter, r *http.Request) { |
| 1266 | token := r.URL.Query().Get("token") |
| 1267 | if !s.tokenOK(token) { |
| 1268 | httpError(w, http.StatusForbidden, "not a member") |
| 1269 | return |
| 1270 | } |
| 1271 | uid, ok := s.db.deviceTokenUser(token) |
| 1272 | if !ok { |
| 1273 | writeJSON(w, http.StatusOK, map[string]any{"threads": []Thread{}}) |
| 1274 | return |
| 1275 | } |
| 1276 | ts, err := s.db.threadsForUser(uid) |
| 1277 | if err != nil { |
| 1278 | httpError(w, http.StatusInternalServerError, "db error") |
| 1279 | return |
| 1280 | } |
| 1281 | writeJSON(w, http.StatusOK, map[string]any{"threads": ts}) |
| 1282 | } |
| 1283 | |
| 1284 | // postThread creates a DM, group, or self thread. The browser generates the |
| 1285 | // thread key and wraps it to each member's roster public key; the server only |
| 1286 | // stores the (server-blind) blobs. The caller must include themselves. DMs are |
| 1287 | // deduped to one per pair. |
| 1288 | func (s *Server) postThread(w http.ResponseWriter, r *http.Request) { |
| 1289 | var body struct { |
| 1290 | Token string `json:"token"` |
| 1291 | Kind string `json:"kind"` |
| 1292 | NameBlob string `json:"name_blob"` |
| 1293 | Members []ThreadMemberKey `json:"members"` |
| 1294 | Visibility string `json:"visibility"` |
| 1295 | OpenKey string `json:"open_key"` |
| 1296 | OpenTier string `json:"open_tier"` |
| 1297 | } |
| 1298 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1299 | httpError(w, http.StatusBadRequest, "bad request") |
| 1300 | return |
| 1301 | } |
| 1302 | if !s.tokenOK(body.Token) { |
| 1303 | httpError(w, http.StatusForbidden, "not a member") |
| 1304 | return |
| 1305 | } |
| 1306 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1307 | if !ok { |
| 1308 | httpError(w, http.StatusForbidden, "no user for token") |
| 1309 | return |
| 1310 | } |
| 1311 | if body.Kind != "self" && body.Kind != "dm" && body.Kind != "group" { |
| 1312 | httpError(w, http.StatusBadRequest, "bad kind") |
| 1313 | return |
| 1314 | } |
| 1315 | if (body.Kind == "self" && len(body.Members) != 1) || |
| 1316 | (body.Kind == "dm" && len(body.Members) != 2) || |
| 1317 | (body.Kind == "group" && len(body.Members) < 1) { |
| 1318 | httpError(w, http.StatusBadRequest, "bad member count") |
| 1319 | return |
| 1320 | } |
| 1321 | // Open community groups: group-only, and the client must supply open_key — |
| 1322 | // the thread key encrypted under the instance key (opaque to the server) — |
| 1323 | // so any member can later discover, decrypt, and self-join. |
| 1324 | if body.Visibility != "" && body.Visibility != "invite" && body.Visibility != "open" { |
| 1325 | httpError(w, http.StatusBadRequest, "bad visibility") |
| 1326 | return |
| 1327 | } |
| 1328 | open := body.Visibility == "open" |
| 1329 | if open && body.Kind != "group" { |
| 1330 | httpError(w, http.StatusBadRequest, "only groups can be open") |
| 1331 | return |
| 1332 | } |
| 1333 | if (open && (body.OpenKey == "" || len(body.OpenKey) > 4096)) || (!open && body.OpenKey != "") { |
| 1334 | httpError(w, http.StatusBadRequest, "bad open key") |
| 1335 | return |
| 1336 | } |
| 1337 | // A level gate rides only on open groups, and only a member of that level |
| 1338 | // can set it — they wrapped open_key under the level's key, which only |
| 1339 | // members hold (the server can verify membership, not the wrap itself). |
| 1340 | if body.OpenTier != "" && (!open || !s.db.tierExists(body.OpenTier) || !s.db.tierMember(body.OpenTier, uid)) { |
| 1341 | httpError(w, http.StatusBadRequest, "bad access level") |
| 1342 | return |
| 1343 | } |
| 1344 | inSet := false |
| 1345 | for _, m := range body.Members { |
| 1346 | // An open group's members may omit their per-member wrap — the key |
| 1347 | // reaches everyone via open_key instead. |
| 1348 | if (m.Wrapped == "" && !open) || len(m.Wrapped) > 4096 || !s.db.userExists(m.UserID) { |
| 1349 | httpError(w, http.StatusBadRequest, "bad member") |
| 1350 | return |
| 1351 | } |
| 1352 | if m.UserID == uid { |
| 1353 | inSet = true |
| 1354 | } |
| 1355 | } |
| 1356 | if !inSet { |
| 1357 | httpError(w, http.StatusForbidden, "must include yourself") |
| 1358 | return |
| 1359 | } |
| 1360 | // DM dedupe: one thread per pair. |
| 1361 | if body.Kind == "dm" { |
| 1362 | other := body.Members[0].UserID |
| 1363 | if other == uid { |
| 1364 | other = body.Members[1].UserID |
| 1365 | } |
| 1366 | if existing, found, _ := s.db.dmThreadFor(uid, other); found { |
| 1367 | writeJSON(w, http.StatusOK, map[string]any{"thread_id": existing, "existing": true}) |
| 1368 | return |
| 1369 | } |
| 1370 | // DM privacy (issue #578): a NEW DM respects the other person's door. |
| 1371 | // An existing conversation (above) is untouched — the setting governs |
| 1372 | // opening contact, not history. |
| 1373 | if !s.dmAllowed(uid, other) { |
| 1374 | httpError(w, http.StatusForbidden, "dms closed") |
| 1375 | return |
| 1376 | } |
| 1377 | // The mass-DM brake (issue #578): fresh members get the tighter |
| 1378 | // first-day bucket — the classic spam-join opens DMs immediately. |
| 1379 | if s.db.userRole(uid) != "admin" && !s.db.isAgent(uid) && !s.allowDM(uid, s.db.userCreatedAt(uid)) { |
| 1380 | httpError(w, http.StatusTooManyRequests, "opening chats too fast — give it a moment") |
| 1381 | return |
| 1382 | } |
| 1383 | } |
| 1384 | id, err := s.db.createThreadVis(body.Kind, body.NameBlob, body.Members, body.Visibility, body.OpenKey, body.OpenTier) |
| 1385 | if err != nil { |
| 1386 | httpError(w, http.StatusInternalServerError, "db error") |
| 1387 | return |
| 1388 | } |
| 1389 | if body.Kind == "dm" { |
| 1390 | other := body.Members[0].UserID |
| 1391 | if other == uid { |
| 1392 | other = body.Members[1].UserID |
| 1393 | } |
| 1394 | // recordDMPair fails on the dm_pairs PK if a concurrent request already |
| 1395 | // created the DM. In that case drop the duplicate thread we just made and |
| 1396 | // return the winner, so a fast double-tap can't spawn two DM threads. |
| 1397 | if err := s.db.recordDMPair(uid, other, id); err != nil { |
| 1398 | if existing, found, _ := s.db.dmThreadFor(uid, other); found { |
| 1399 | _ = s.db.deleteThread(id) |
| 1400 | writeJSON(w, http.StatusOK, map[string]any{"thread_id": existing, "existing": true}) |
| 1401 | return |
| 1402 | } |
| 1403 | httpError(w, http.StatusInternalServerError, "db error") |
| 1404 | return |
| 1405 | } |
| 1406 | } |
| 1407 | writeJSON(w, http.StatusOK, map[string]any{"thread_id": id}) |
| 1408 | } |
| 1409 | |
| 1410 | // getOpenThreads lists the community directory: every open group, joined or |
| 1411 | // not, each carrying its instance-key-wrapped open_key so any member's client |
| 1412 | // can decrypt names/photos and self-join. Members only — never public: someone |
| 1413 | // outside the space sees nothing. |
| 1414 | func (s *Server) getOpenThreads(w http.ResponseWriter, r *http.Request) { |
| 1415 | token := r.URL.Query().Get("token") |
| 1416 | if !s.tokenOK(token) { |
| 1417 | httpError(w, http.StatusForbidden, "not a member") |
| 1418 | return |
| 1419 | } |
| 1420 | uid, ok := s.db.deviceTokenUser(token) |
| 1421 | if !ok { |
| 1422 | writeJSON(w, http.StatusOK, map[string]any{"threads": []OpenThread{}}) |
| 1423 | return |
| 1424 | } |
| 1425 | ts, err := s.db.openThreads(uid) |
| 1426 | if err != nil { |
| 1427 | httpError(w, http.StatusInternalServerError, "db error") |
| 1428 | return |
| 1429 | } |
| 1430 | writeJSON(w, http.StatusOK, map[string]any{"threads": ts}) |
| 1431 | } |
| 1432 | |
| 1433 | // postThreadJoin self-serve-joins the caller to an open group. No key material |
| 1434 | // changes hands: the joiner already holds the instance key, and the group's |
| 1435 | // open_key rides their next thread-list fetch. |
| 1436 | func (s *Server) postThreadJoin(w http.ResponseWriter, r *http.Request) { |
| 1437 | var body struct { |
| 1438 | Token string `json:"token"` |
| 1439 | } |
| 1440 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1441 | httpError(w, http.StatusBadRequest, "bad request") |
| 1442 | return |
| 1443 | } |
| 1444 | if !s.tokenOK(body.Token) { |
| 1445 | httpError(w, http.StatusForbidden, "not a member") |
| 1446 | return |
| 1447 | } |
| 1448 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1449 | if !ok { |
| 1450 | httpError(w, http.StatusForbidden, "no user for token") |
| 1451 | return |
| 1452 | } |
| 1453 | if err := s.db.joinOpenThread(r.PathValue("id"), uid); err != nil { |
| 1454 | if errors.Is(err, errNotOpen) { |
| 1455 | httpError(w, http.StatusForbidden, "not an open group") |
| 1456 | return |
| 1457 | } |
| 1458 | httpError(w, http.StatusInternalServerError, "db error") |
| 1459 | return |
| 1460 | } |
| 1461 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1462 | } |
| 1463 | |
| 1464 | // postThreadVisibility opens or closes a group for discovery. Any member may |
| 1465 | // flip it (groups are flat, like rename). Opening requires open_key — the |
| 1466 | // thread key encrypted under the instance key by the caller's browser; the |
| 1467 | // server can open neither. An existing open_key is never overwritten (see |
| 1468 | // setThreadVisibility), and closing keeps it so self-serve joiners keep their |
| 1469 | // key source — 'invite' only stops discovery and new joins. |
| 1470 | func (s *Server) postThreadVisibility(w http.ResponseWriter, r *http.Request) { |
| 1471 | var body struct { |
| 1472 | Token string `json:"token"` |
| 1473 | Visibility string `json:"visibility"` |
| 1474 | OpenKey string `json:"open_key"` |
| 1475 | OpenTier string `json:"open_tier"` |
| 1476 | } |
| 1477 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1478 | httpError(w, http.StatusBadRequest, "bad request") |
| 1479 | return |
| 1480 | } |
| 1481 | if !s.tokenOK(body.Token) { |
| 1482 | httpError(w, http.StatusForbidden, "not a member") |
| 1483 | return |
| 1484 | } |
| 1485 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1486 | if !ok { |
| 1487 | httpError(w, http.StatusForbidden, "no user for token") |
| 1488 | return |
| 1489 | } |
| 1490 | threadID := r.PathValue("id") |
| 1491 | if !s.db.threadMember(threadID, uid) { |
| 1492 | httpError(w, http.StatusForbidden, "not a thread member") |
| 1493 | return |
| 1494 | } |
| 1495 | if s.db.threadKind(threadID) != "group" { |
| 1496 | httpError(w, http.StatusBadRequest, "only groups can be open") |
| 1497 | return |
| 1498 | } |
| 1499 | open := body.Visibility == "open" |
| 1500 | if body.Visibility != "invite" && !open { |
| 1501 | httpError(w, http.StatusBadRequest, "bad visibility") |
| 1502 | return |
| 1503 | } |
| 1504 | hasKey, curTier := s.db.threadOpenInfo(threadID) |
| 1505 | // First open requires the key blob; a REOPEN must not (the stored |
| 1506 | // open_key survives closing and is never overwritten) — otherwise only |
| 1507 | // wrap-key holders could reopen, while any member could close. |
| 1508 | if (open && !hasKey && (body.OpenKey == "" || len(body.OpenKey) > 4096)) || |
| 1509 | len(body.OpenKey) > 4096 || (!open && body.OpenKey != "") { |
| 1510 | httpError(w, http.StatusBadRequest, "bad open key") |
| 1511 | return |
| 1512 | } |
| 1513 | // A NEW gate needs its setter to be in the level (they wrapped open_key |
| 1514 | // under the level's key, which only members hold). Re-naming the stored |
| 1515 | // gate on reopen moves no key material, so it needs no such check. |
| 1516 | if body.OpenTier != "" && body.OpenTier != curTier && |
| 1517 | (!open || !s.db.tierExists(body.OpenTier) || !s.db.tierMember(body.OpenTier, uid)) { |
| 1518 | httpError(w, http.StatusBadRequest, "bad access level") |
| 1519 | return |
| 1520 | } |
| 1521 | // The gate is fixed once an open_key exists (changing it would need the |
| 1522 | // rekey the never-overwrite rule forbids) — refuse loudly rather than |
| 1523 | // letting a caller believe the gate moved. |
| 1524 | if open && hasKey && body.OpenTier != curTier { |
| 1525 | httpError(w, http.StatusBadRequest, "access level is fixed once a group has opened") |
| 1526 | return |
| 1527 | } |
| 1528 | if err := s.db.setThreadVisibility(threadID, body.Visibility, body.OpenKey, body.OpenTier); err != nil { |
| 1529 | httpError(w, http.StatusInternalServerError, "db error") |
| 1530 | return |
| 1531 | } |
| 1532 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1533 | } |
| 1534 | |
| 1535 | // postThreadDefault flags an open group as joined-by-default for new members |
| 1536 | // (Slack's #general). Space policy rather than group housekeeping, so unlike |
| 1537 | // rename/visibility it's admin-role-gated, not any-member. Only open groups |
| 1538 | // can default (a default group must be self-joinable); unflagging is always |
| 1539 | // allowed. Existing members are never force-joined. |
| 1540 | func (s *Server) postThreadDefault(w http.ResponseWriter, r *http.Request) { |
| 1541 | var body struct { |
| 1542 | Token string `json:"token"` |
| 1543 | Default bool `json:"default"` |
| 1544 | } |
| 1545 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1546 | httpError(w, http.StatusBadRequest, "bad request") |
| 1547 | return |
| 1548 | } |
| 1549 | if !s.tokenOK(body.Token) { |
| 1550 | httpError(w, http.StatusForbidden, "not a member") |
| 1551 | return |
| 1552 | } |
| 1553 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1554 | if !ok || s.db.userRole(uid) != "admin" { |
| 1555 | httpError(w, http.StatusForbidden, "admins only") |
| 1556 | return |
| 1557 | } |
| 1558 | threadID := r.PathValue("id") |
| 1559 | if !s.db.threadMember(threadID, uid) { |
| 1560 | httpError(w, http.StatusForbidden, "not a thread member") |
| 1561 | return |
| 1562 | } |
| 1563 | if body.Default && !s.db.threadIsOpen(threadID) { |
| 1564 | httpError(w, http.StatusBadRequest, "only open groups can be default") |
| 1565 | return |
| 1566 | } |
| 1567 | // The default sweep deliberately skips level-gated groups (a newcomer |
| 1568 | // holds no level yet) — refuse the flag rather than save-and-ignore it. |
| 1569 | if _, gate := s.db.threadOpenInfo(threadID); body.Default && gate != "" { |
| 1570 | httpError(w, http.StatusBadRequest, "limited groups can't be default") |
| 1571 | return |
| 1572 | } |
| 1573 | if err := s.db.setThreadDefault(threadID, body.Default); err != nil { |
| 1574 | httpError(w, http.StatusInternalServerError, "db error") |
| 1575 | return |
| 1576 | } |
| 1577 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1578 | } |
| 1579 | |
| 1580 | // postThreadMember adds an existing instance member to a thread the caller is in. |
| 1581 | // The caller's browser wraps the thread key to the new member's public key. |
| 1582 | func (s *Server) postThreadMember(w http.ResponseWriter, r *http.Request) { |
| 1583 | var body struct { |
| 1584 | Token string `json:"token"` |
| 1585 | UserID string `json:"user_id"` |
| 1586 | Wrapped string `json:"wrapped"` |
| 1587 | } |
| 1588 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1589 | httpError(w, http.StatusBadRequest, "bad request") |
| 1590 | return |
| 1591 | } |
| 1592 | if !s.tokenOK(body.Token) { |
| 1593 | httpError(w, http.StatusForbidden, "not a member") |
| 1594 | return |
| 1595 | } |
| 1596 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1597 | if !ok { |
| 1598 | httpError(w, http.StatusForbidden, "no user for token") |
| 1599 | return |
| 1600 | } |
| 1601 | threadID := r.PathValue("id") |
| 1602 | if !s.db.threadMember(threadID, uid) { |
| 1603 | httpError(w, http.StatusForbidden, "not a thread member") |
| 1604 | return |
| 1605 | } |
| 1606 | // Only groups grow. Adding to a DM/self thread would break the one-thread-per- |
| 1607 | // pair invariant (dm_pairs) and silently turn a 2-person DM into a 3-way thread. |
| 1608 | if s.db.threadKind(threadID) != "group" { |
| 1609 | httpError(w, http.StatusBadRequest, "can only add people to a group") |
| 1610 | return |
| 1611 | } |
| 1612 | if body.UserID == "" || !s.db.userExists(body.UserID) || body.Wrapped == "" || len(body.Wrapped) > 4096 { |
| 1613 | httpError(w, http.StatusBadRequest, "bad member") |
| 1614 | return |
| 1615 | } |
| 1616 | // A block cuts indirect contact too (issue #578): neither side can pull |
| 1617 | // the other into a group. Same generic refusal as elsewhere — the add just |
| 1618 | // doesn't work, with no hint of which mechanism said no. |
| 1619 | if s.db.blockedEither(uid, body.UserID) { |
| 1620 | httpError(w, http.StatusForbidden, "can't add this member") |
| 1621 | return |
| 1622 | } |
| 1623 | // Adding an existing member is a no-op, checked here on purpose: a |
| 1624 | // self-serve joiner of an open group has membership but no thread_keys |
| 1625 | // row, and that empty slot must not be fillable with another member's |
| 1626 | // arbitrary blob (addThreadMember's DO NOTHING only protects rows that |
| 1627 | // already exist). The one sanctioned fill-an-existing-member's-slot path |
| 1628 | // is invite claiming, which writes the joiner's OWN wrap (claimKeyInvite). |
| 1629 | if s.db.threadMember(threadID, body.UserID) { |
| 1630 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1631 | return |
| 1632 | } |
| 1633 | if err := s.db.addThreadMember(threadID, body.UserID, body.Wrapped); err != nil { |
| 1634 | httpError(w, http.StatusInternalServerError, "db error") |
| 1635 | return |
| 1636 | } |
| 1637 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1638 | } |
| 1639 | |
| 1640 | // postThreadName renames a thread (the group name is client-encrypted, so the |
| 1641 | // server only stores the new blob). Any member may rename. |
| 1642 | func (s *Server) postThreadName(w http.ResponseWriter, r *http.Request) { |
| 1643 | var body struct { |
| 1644 | Token string `json:"token"` |
| 1645 | NameBlob string `json:"name_blob"` |
| 1646 | } |
| 1647 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1648 | httpError(w, http.StatusBadRequest, "bad request") |
| 1649 | return |
| 1650 | } |
| 1651 | if !s.tokenOK(body.Token) { |
| 1652 | httpError(w, http.StatusForbidden, "not a member") |
| 1653 | return |
| 1654 | } |
| 1655 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1656 | if !ok || len(body.NameBlob) > 4096 { |
| 1657 | httpError(w, http.StatusBadRequest, "bad request") |
| 1658 | return |
| 1659 | } |
| 1660 | threadID := r.PathValue("id") |
| 1661 | if !s.db.threadMember(threadID, uid) { |
| 1662 | httpError(w, http.StatusForbidden, "not a thread member") |
| 1663 | return |
| 1664 | } |
| 1665 | // The space thread has no name to set (no sidebar row, no chat view) — |
| 1666 | // with implicit membership every member would pass the gate above, so |
| 1667 | // fence the write off rather than leave a pointless scribble surface. |
| 1668 | if s.db.threadKind(threadID) == "space" { |
| 1669 | httpError(w, http.StatusBadRequest, "the space thread has no name") |
| 1670 | return |
| 1671 | } |
| 1672 | if err := s.db.setThreadName(threadID, body.NameBlob); err != nil { |
| 1673 | httpError(w, http.StatusInternalServerError, "db error") |
| 1674 | return |
| 1675 | } |
| 1676 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1677 | } |
| 1678 | |
| 1679 | // getInstanceKey returns the caller's wrapped instance key (if granted) plus the |
| 1680 | // list of users who already hold it, so a holder only re-wraps to those missing. |
| 1681 | func (s *Server) getInstanceKey(w http.ResponseWriter, r *http.Request) { |
| 1682 | token := r.URL.Query().Get("token") |
| 1683 | if !s.tokenOK(token) { |
| 1684 | httpError(w, http.StatusForbidden, "not a member") |
| 1685 | return |
| 1686 | } |
| 1687 | uid, ok := s.db.deviceTokenUser(token) |
| 1688 | if !ok { |
| 1689 | writeJSON(w, http.StatusOK, map[string]any{"wrapped": "", "have": []string{}}) |
| 1690 | return |
| 1691 | } |
| 1692 | wrapped, _, err := s.db.instanceKeyFor(uid) |
| 1693 | if err != nil { |
| 1694 | httpError(w, http.StatusInternalServerError, "db error") |
| 1695 | return |
| 1696 | } |
| 1697 | have, err := s.db.instanceKeyHolders() |
| 1698 | if err != nil { |
| 1699 | httpError(w, http.StatusInternalServerError, "db error") |
| 1700 | return |
| 1701 | } |
| 1702 | out := map[string]any{"wrapped": wrapped, "have": have} |
| 1703 | // A keyless member waiting on holders gets liveness alongside (#785): |
| 1704 | // whether any holder is connected right now, and the newest read |
| 1705 | // watermark among them — enough for the client to say "the members who |
| 1706 | // hold this space's key haven't been online since May" instead of an |
| 1707 | // eternal "still setting up". Metadata the server already holds (it owns |
| 1708 | // the sockets and the read marks); no key material rides on it. |
| 1709 | if wrapped == "" && len(have) > 0 { |
| 1710 | online := false |
| 1711 | for _, h := range have { |
| 1712 | if s.presence.connected(h) { |
| 1713 | online = true |
| 1714 | break |
| 1715 | } |
| 1716 | } |
| 1717 | lastActive, err := s.db.lastReadActivity(have) |
| 1718 | if err != nil { |
| 1719 | httpError(w, http.StatusInternalServerError, "db error") |
| 1720 | return |
| 1721 | } |
| 1722 | out["holders_online"] = online |
| 1723 | out["holders_last_active"] = lastActive |
| 1724 | } |
| 1725 | writeJSON(w, http.StatusOK, out) |
| 1726 | } |
| 1727 | |
| 1728 | // resetInstanceKeyHandler is the break-glass for an orphaned instance key |
| 1729 | // (#785): admin-gated, destructive by design (the old key's sealed blobs are |
| 1730 | // gone for good — the web admin console spells that out before calling). The |
| 1731 | // next member to load the app bootstraps a fresh key. |
| 1732 | func (s *Server) resetInstanceKeyHandler(w http.ResponseWriter, r *http.Request) { |
| 1733 | if !s.requireAdmin(w, r) { |
| 1734 | return |
| 1735 | } |
| 1736 | if err := s.db.resetInstanceKey(); err != nil { |
| 1737 | httpError(w, http.StatusInternalServerError, "db error") |
| 1738 | return |
| 1739 | } |
| 1740 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1741 | } |
| 1742 | |
| 1743 | // postInstanceKey stores the (server-blind) instance key wrapped to one or more |
| 1744 | // members — used to bootstrap it and to grant it to members who lack it. |
| 1745 | func (s *Server) postInstanceKey(w http.ResponseWriter, r *http.Request) { |
| 1746 | var body struct { |
| 1747 | Token string `json:"token"` |
| 1748 | Grants []ThreadMemberKey `json:"grants"` |
| 1749 | } |
| 1750 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1751 | httpError(w, http.StatusBadRequest, "bad request") |
| 1752 | return |
| 1753 | } |
| 1754 | if !s.tokenOK(body.Token) { |
| 1755 | httpError(w, http.StatusForbidden, "not a member") |
| 1756 | return |
| 1757 | } |
| 1758 | if _, ok := s.db.deviceTokenUser(body.Token); !ok { |
| 1759 | httpError(w, http.StatusForbidden, "no user for token") |
| 1760 | return |
| 1761 | } |
| 1762 | granted := map[string]bool{} |
| 1763 | for _, g := range body.Grants { |
| 1764 | if g.UserID == "" || g.Wrapped == "" || len(g.Wrapped) > 4096 || !s.db.userExists(g.UserID) { |
| 1765 | continue |
| 1766 | } |
| 1767 | if err := s.db.grantInstanceKey(g.UserID, g.Wrapped); err != nil { |
| 1768 | httpError(w, http.StatusInternalServerError, "db error") |
| 1769 | return |
| 1770 | } |
| 1771 | granted[g.UserID] = true |
| 1772 | } |
| 1773 | // Nudge the just-granted users' open tabs to fetch + unwrap right away, so a |
| 1774 | // member stops showing "Photo syncing…" the instant a holder wraps the key to |
| 1775 | // them — without waiting for a reload. Keyless signal, routed only to them. |
| 1776 | if len(granted) > 0 { |
| 1777 | out, _ := json.Marshal(map[string]any{"type": "instance_key_granted"}) |
| 1778 | s.hub.broadcast <- outbound{members: granted, data: out} |
| 1779 | } |
| 1780 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1781 | } |
| 1782 | |
| 1783 | // nudgeInstanceKey is called by a member who holds no copy of the instance key. It |
| 1784 | // relays a keyless "someone needs it" hint to every connected client; holders |
| 1785 | // respond by (re-)wrapping the key to whoever's missing it (see the WS handler + |
| 1786 | // grantInstanceKeyTo in the client). Carries no key material — just a prod, so a |
| 1787 | // new member doesn't have to wait for a holder to next reboot. |
| 1788 | func (s *Server) nudgeInstanceKey(w http.ResponseWriter, r *http.Request) { |
| 1789 | token := r.URL.Query().Get("token") |
| 1790 | if !s.tokenOK(token) { |
| 1791 | httpError(w, http.StatusForbidden, "not a member") |
| 1792 | return |
| 1793 | } |
| 1794 | // Carry who's asking and their public key: a holder's own roster view |
| 1795 | // (connections) may not include the nudger at all — a fresh joiner shares |
| 1796 | // no thread with most members — so holders wrap to this key directly. |
| 1797 | msg := map[string]any{"type": "instance_key_nudge"} |
| 1798 | if uid, ok := s.db.deviceTokenUser(token); ok { |
| 1799 | if pub := s.db.userPublicKey(uid); pub != "" { |
| 1800 | msg["user_id"] = uid |
| 1801 | msg["public_key"] = pub |
| 1802 | } |
| 1803 | } |
| 1804 | out, _ := json.Marshal(msg) |
| 1805 | s.hub.broadcast <- outbound{data: out} // members:nil → everyone |
| 1806 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1807 | } |
| 1808 | |
| 1809 | // adminTiers lists the access levels for the admin console's cohort picker |
| 1810 | // (bearer-token surface — the console holds no member token). Same rows the |
| 1811 | // member endpoint serves, unpersonalised. |
| 1812 | func (s *Server) adminTiers(w http.ResponseWriter, r *http.Request) { |
| 1813 | if !s.requireAdmin(w, r) { |
| 1814 | return |
| 1815 | } |
| 1816 | ts, err := s.db.listTiers("", true) |
| 1817 | if err != nil { |
| 1818 | httpError(w, http.StatusInternalServerError, "db error") |
| 1819 | return |
| 1820 | } |
| 1821 | writeJSON(w, http.StatusOK, map[string]any{"tiers": ts}) |
| 1822 | } |
| 1823 | |
| 1824 | // ---- tiers ---------------------------------------------------------------- |
| 1825 | // Admin-curated member sets that carry key material (docs/community-and-tiers.md). |
| 1826 | // The key machinery is the instance key's, per tier: clients mint and wrap the |
| 1827 | // key, the server stores blobs it can't open, grants never overwrite, and WS |
| 1828 | // prods are keyless hints. Management (create/assign/remove/delete) is |
| 1829 | // admin-ROLE-gated — tiers are space policy, like default groups. |
| 1830 | |
| 1831 | // tierAdmin resolves the caller and requires the admin role. Returns ("", |
| 1832 | // false) after writing the error when the gate fails. |
| 1833 | func (s *Server) tierAdmin(w http.ResponseWriter, token string) (string, bool) { |
| 1834 | if !s.tokenOK(token) { |
| 1835 | httpError(w, http.StatusForbidden, "not a member") |
| 1836 | return "", false |
| 1837 | } |
| 1838 | uid, ok := s.db.deviceTokenUser(token) |
| 1839 | if !ok || s.db.userRole(uid) != "admin" { |
| 1840 | httpError(w, http.StatusForbidden, "admins only") |
| 1841 | return "", false |
| 1842 | } |
| 1843 | return uid, true |
| 1844 | } |
| 1845 | |
| 1846 | // getTiers lists every tier for any member (names are plaintext space policy, |
| 1847 | // like the roster), personalised with the caller's membership + key state. |
| 1848 | func (s *Server) getTiers(w http.ResponseWriter, r *http.Request) { |
| 1849 | token := r.URL.Query().Get("token") |
| 1850 | if !s.tokenOK(token) { |
| 1851 | httpError(w, http.StatusForbidden, "not a member") |
| 1852 | return |
| 1853 | } |
| 1854 | uid, ok := s.db.deviceTokenUser(token) |
| 1855 | if !ok { |
| 1856 | writeJSON(w, http.StatusOK, map[string]any{"tiers": []Tier{}}) |
| 1857 | return |
| 1858 | } |
| 1859 | ts, err := s.db.listTiers(uid, s.db.userRole(uid) == "admin") |
| 1860 | if err != nil { |
| 1861 | httpError(w, http.StatusInternalServerError, "db error") |
| 1862 | return |
| 1863 | } |
| 1864 | writeJSON(w, http.StatusOK, map[string]any{"tiers": ts}) |
| 1865 | } |
| 1866 | |
| 1867 | func (s *Server) postTier(w http.ResponseWriter, r *http.Request) { |
| 1868 | var body struct { |
| 1869 | Token string `json:"token"` |
| 1870 | Name string `json:"name"` |
| 1871 | } |
| 1872 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1873 | httpError(w, http.StatusBadRequest, "bad request") |
| 1874 | return |
| 1875 | } |
| 1876 | if _, ok := s.tierAdmin(w, body.Token); !ok { |
| 1877 | return |
| 1878 | } |
| 1879 | name := strings.TrimSpace(body.Name) |
| 1880 | if name == "" || utf8.RuneCountInString(name) > 60 { |
| 1881 | httpError(w, http.StatusBadRequest, "bad name") |
| 1882 | return |
| 1883 | } |
| 1884 | id, err := s.db.createTier(name) |
| 1885 | if err != nil { |
| 1886 | httpError(w, http.StatusInternalServerError, "db error") |
| 1887 | return |
| 1888 | } |
| 1889 | writeJSON(w, http.StatusOK, map[string]any{"id": id}) |
| 1890 | } |
| 1891 | |
| 1892 | func (s *Server) deleteTierHandler(w http.ResponseWriter, r *http.Request) { |
| 1893 | var body struct { |
| 1894 | Token string `json:"token"` |
| 1895 | } |
| 1896 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1897 | httpError(w, http.StatusBadRequest, "bad request") |
| 1898 | return |
| 1899 | } |
| 1900 | if _, ok := s.tierAdmin(w, body.Token); !ok { |
| 1901 | return |
| 1902 | } |
| 1903 | id := r.PathValue("id") |
| 1904 | // A level that still gates groups can't be deleted: those groups' keys |
| 1905 | // are wrapped under it forever, and for self-serve joiners that wrap is |
| 1906 | // their only key source (see deleteTier's comment). |
| 1907 | if n := s.db.tierGatesThreads(id); n > 0 { |
| 1908 | httpError(w, http.StatusConflict, "this level still limits groups") |
| 1909 | return |
| 1910 | } |
| 1911 | if err := s.db.deleteTier(id); err != nil { |
| 1912 | httpError(w, http.StatusInternalServerError, "db error") |
| 1913 | return |
| 1914 | } |
| 1915 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1916 | } |
| 1917 | |
| 1918 | // postTierMember assigns a member to a tier ('admin' source). The prod fans |
| 1919 | // out two keyless hints: holders learn someone needs the key wrapped to them |
| 1920 | // (so an online holder acts immediately, no reload), and the assignee's own |
| 1921 | // tabs learn their tiers changed. |
| 1922 | func (s *Server) postTierMember(w http.ResponseWriter, r *http.Request) { |
| 1923 | var body struct { |
| 1924 | Token string `json:"token"` |
| 1925 | UserID string `json:"user_id"` |
| 1926 | } |
| 1927 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1928 | httpError(w, http.StatusBadRequest, "bad request") |
| 1929 | return |
| 1930 | } |
| 1931 | if _, ok := s.tierAdmin(w, body.Token); !ok { |
| 1932 | return |
| 1933 | } |
| 1934 | tierID := r.PathValue("id") |
| 1935 | if !s.db.tierExists(tierID) || !s.db.userExists(body.UserID) { |
| 1936 | httpError(w, http.StatusBadRequest, "bad tier or member") |
| 1937 | return |
| 1938 | } |
| 1939 | if err := s.db.assignTier(tierID, body.UserID, "admin"); err != nil { |
| 1940 | httpError(w, http.StatusInternalServerError, "db error") |
| 1941 | return |
| 1942 | } |
| 1943 | s.prodTierHolders(tierID, body.UserID) |
| 1944 | s.prodTiersChanged(body.UserID) |
| 1945 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1946 | } |
| 1947 | |
| 1948 | func (s *Server) postTierRemove(w http.ResponseWriter, r *http.Request) { |
| 1949 | var body struct { |
| 1950 | Token string `json:"token"` |
| 1951 | UserID string `json:"user_id"` |
| 1952 | } |
| 1953 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1954 | httpError(w, http.StatusBadRequest, "bad request") |
| 1955 | return |
| 1956 | } |
| 1957 | uid, ok := s.tierAdmin(w, body.Token) |
| 1958 | if !ok { |
| 1959 | return |
| 1960 | } |
| 1961 | if err := s.db.unassignTier(r.PathValue("id"), body.UserID); err != nil { |
| 1962 | httpError(w, http.StatusInternalServerError, "db error") |
| 1963 | return |
| 1964 | } |
| 1965 | // Taking an access level away is a moderation-grade action (the "demote" |
| 1966 | // rung on the ladder, issue #578) — record it. |
| 1967 | s.db.addAudit(uid, "level.removed", body.UserID, "", "", r.PathValue("id")) |
| 1968 | s.prodTiersChanged(body.UserID) |
| 1969 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 1970 | } |
| 1971 | |
| 1972 | // postTierKeys stores wrapped tier-key copies. Two callers are legitimate: |
| 1973 | // the MINT moment (no copies exist yet — admin-only, their client just |
| 1974 | // generated the key and wrapped it to the initial members), and a HOLDER |
| 1975 | // wrapping to members who joined since. Grants only land on tier members, |
| 1976 | // and never overwrite (grantTierKey). |
| 1977 | func (s *Server) postTierKeys(w http.ResponseWriter, r *http.Request) { |
| 1978 | var body struct { |
| 1979 | Token string `json:"token"` |
| 1980 | Grants []ThreadMemberKey `json:"grants"` |
| 1981 | } |
| 1982 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 1983 | httpError(w, http.StatusBadRequest, "bad request") |
| 1984 | return |
| 1985 | } |
| 1986 | if !s.tokenOK(body.Token) { |
| 1987 | httpError(w, http.StatusForbidden, "not a member") |
| 1988 | return |
| 1989 | } |
| 1990 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 1991 | if !ok { |
| 1992 | httpError(w, http.StatusForbidden, "no user for token") |
| 1993 | return |
| 1994 | } |
| 1995 | tierID := r.PathValue("id") |
| 1996 | if !s.db.tierExists(tierID) { |
| 1997 | httpError(w, http.StatusBadRequest, "no such tier") |
| 1998 | return |
| 1999 | } |
| 2000 | valid := []ThreadMemberKey{} |
| 2001 | granted := map[string]bool{} |
| 2002 | for _, g := range body.Grants { |
| 2003 | if g.UserID == "" || g.Wrapped == "" || len(g.Wrapped) > 4096 || !s.db.tierMember(tierID, g.UserID) { |
| 2004 | continue |
| 2005 | } |
| 2006 | valid = append(valid, g) |
| 2007 | granted[g.UserID] = true |
| 2008 | } |
| 2009 | if !s.db.tierKeyMinted(tierID) { |
| 2010 | // The mint moment — admin-only, one-way, transactional: concurrent |
| 2011 | // minters serialize on key_minted, exactly one key ever enters a |
| 2012 | // level. The loser gets 409 and must reload (never install its key). |
| 2013 | if s.db.userRole(uid) != "admin" { |
| 2014 | httpError(w, http.StatusForbidden, "admins only") |
| 2015 | return |
| 2016 | } |
| 2017 | if err := s.db.mintTierKeys(tierID, valid); err != nil { |
| 2018 | if errors.Is(err, errAlreadyMinted) { |
| 2019 | httpError(w, http.StatusConflict, "already minted") |
| 2020 | return |
| 2021 | } |
| 2022 | httpError(w, http.StatusInternalServerError, "db error") |
| 2023 | return |
| 2024 | } |
| 2025 | } else if s.db.tierKeyCount(tierID) == 0 { |
| 2026 | // Minted once, but every holder is gone — the key is unrecoverable. |
| 2027 | // Refuse loudly instead of silently minting a second key that would |
| 2028 | // seal every group gated under the first: the honest path is to |
| 2029 | // delete this level and create a fresh one. |
| 2030 | httpError(w, http.StatusGone, "this level's key is lost — delete the level and create a new one") |
| 2031 | return |
| 2032 | } else { |
| 2033 | if !s.db.tierHolder(tierID, uid) { |
| 2034 | httpError(w, http.StatusForbidden, "not a key holder") |
| 2035 | return |
| 2036 | } |
| 2037 | for _, g := range valid { |
| 2038 | if err := s.db.grantTierKey(tierID, g.UserID, g.Wrapped); err != nil { |
| 2039 | httpError(w, http.StatusInternalServerError, "db error") |
| 2040 | return |
| 2041 | } |
| 2042 | } |
| 2043 | } |
| 2044 | if len(granted) > 0 { |
| 2045 | out, _ := json.Marshal(map[string]any{"type": "tier_key_granted", "tier_id": tierID}) |
| 2046 | s.hub.broadcast <- outbound{members: granted, data: out} |
| 2047 | } |
| 2048 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2049 | } |
| 2050 | |
| 2051 | // nudgeTierKey: a tier member with no key copy asks for one. Unlike the |
| 2052 | // instance-key nudge (everyone), this prods exactly the members who can help — |
| 2053 | // current holders. Keyless, like every prod. |
| 2054 | func (s *Server) nudgeTierKey(w http.ResponseWriter, r *http.Request) { |
| 2055 | var body struct { |
| 2056 | Token string `json:"token"` |
| 2057 | } |
| 2058 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2059 | httpError(w, http.StatusBadRequest, "bad request") |
| 2060 | return |
| 2061 | } |
| 2062 | if !s.tokenOK(body.Token) { |
| 2063 | httpError(w, http.StatusForbidden, "not a member") |
| 2064 | return |
| 2065 | } |
| 2066 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2067 | if !ok { |
| 2068 | httpError(w, http.StatusForbidden, "no user for token") |
| 2069 | return |
| 2070 | } |
| 2071 | tierID := r.PathValue("id") |
| 2072 | if !s.db.tierMember(tierID, uid) { |
| 2073 | httpError(w, http.StatusForbidden, "not in this tier") |
| 2074 | return |
| 2075 | } |
| 2076 | s.prodTierHolders(tierID, uid) |
| 2077 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2078 | } |
| 2079 | |
| 2080 | // postTierPolicy sets a level's visibility policy — admin-gated (it's space |
| 2081 | // policy, like management). 'shown' | 'hidden' | 'user'. |
| 2082 | func (s *Server) postTierPolicy(w http.ResponseWriter, r *http.Request) { |
| 2083 | var body struct { |
| 2084 | Token string `json:"token"` |
| 2085 | Policy string `json:"policy"` |
| 2086 | } |
| 2087 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2088 | httpError(w, http.StatusBadRequest, "bad request") |
| 2089 | return |
| 2090 | } |
| 2091 | if _, ok := s.tierAdmin(w, body.Token); !ok { |
| 2092 | return |
| 2093 | } |
| 2094 | if body.Policy != "shown" && body.Policy != "hidden" && body.Policy != "user" { |
| 2095 | httpError(w, http.StatusBadRequest, "bad policy") |
| 2096 | return |
| 2097 | } |
| 2098 | if !s.db.tierExists(r.PathValue("id")) { |
| 2099 | httpError(w, http.StatusBadRequest, "no such level") |
| 2100 | return |
| 2101 | } |
| 2102 | if err := s.db.setTierVisibility(r.PathValue("id"), body.Policy); err != nil { |
| 2103 | httpError(w, http.StatusInternalServerError, "db error") |
| 2104 | return |
| 2105 | } |
| 2106 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2107 | } |
| 2108 | |
| 2109 | // postTierShow is a member's own show/hide choice for a level they're in — |
| 2110 | // honoured only while the level's policy is 'user' (else the admin policy |
| 2111 | // decides). Members choose whether THEIR membership shows to non-members. |
| 2112 | func (s *Server) postTierShow(w http.ResponseWriter, r *http.Request) { |
| 2113 | var body struct { |
| 2114 | Token string `json:"token"` |
| 2115 | Show bool `json:"show"` |
| 2116 | } |
| 2117 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2118 | httpError(w, http.StatusBadRequest, "bad request") |
| 2119 | return |
| 2120 | } |
| 2121 | if !s.tokenOK(body.Token) { |
| 2122 | httpError(w, http.StatusForbidden, "not a member") |
| 2123 | return |
| 2124 | } |
| 2125 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2126 | if !ok { |
| 2127 | httpError(w, http.StatusForbidden, "no user for token") |
| 2128 | return |
| 2129 | } |
| 2130 | if !s.db.tierMember(r.PathValue("id"), uid) { |
| 2131 | httpError(w, http.StatusForbidden, "not in this level") |
| 2132 | return |
| 2133 | } |
| 2134 | if err := s.db.setUserTierVisible(r.PathValue("id"), uid, body.Show); err != nil { |
| 2135 | httpError(w, http.StatusInternalServerError, "db error") |
| 2136 | return |
| 2137 | } |
| 2138 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2139 | } |
| 2140 | |
| 2141 | // prodTierHolders tells current key holders that userID needs the tier key |
| 2142 | // wrapped to them — carrying the target's pubkey, since a holder's roster |
| 2143 | // view may not include a fresh joiner (the instance-key nudge's reasoning). |
| 2144 | func (s *Server) prodTierHolders(tierID, userID string) { |
| 2145 | holders, err := s.db.tierHolderIDs(tierID) |
| 2146 | if err != nil || len(holders) == 0 { |
| 2147 | return |
| 2148 | } |
| 2149 | pub := s.db.userPublicKey(userID) |
| 2150 | if pub == "" { |
| 2151 | return |
| 2152 | } |
| 2153 | set := map[string]bool{} |
| 2154 | for _, h := range holders { |
| 2155 | if h != userID { |
| 2156 | set[h] = true |
| 2157 | } |
| 2158 | } |
| 2159 | if len(set) == 0 { |
| 2160 | return |
| 2161 | } |
| 2162 | out, _ := json.Marshal(map[string]any{ |
| 2163 | "type": "tier_key_nudge", "tier_id": tierID, "user_id": userID, "public_key": pub, |
| 2164 | }) |
| 2165 | s.hub.broadcast <- outbound{members: set, data: out} |
| 2166 | } |
| 2167 | |
| 2168 | // prodTiersChanged tells one member's own tabs their tier set changed. |
| 2169 | func (s *Server) prodTiersChanged(userID string) { |
| 2170 | out, _ := json.Marshal(map[string]any{"type": "tiers_changed"}) |
| 2171 | s.hub.broadcast <- outbound{members: map[string]bool{userID: true}, data: out} |
| 2172 | } |
| 2173 | |
| 2174 | // postLabel sets the caller's own display name, encrypted under the instance key |
| 2175 | // (a server-blind blob). This is how a person publishes their name — the server |
| 2176 | // never sees the plaintext. Broadcasts so every client refreshes the roster name. |
| 2177 | func (s *Server) postLabel(w http.ResponseWriter, r *http.Request) { |
| 2178 | var body struct { |
| 2179 | Token string `json:"token"` |
| 2180 | LabelBlob string `json:"label_blob"` |
| 2181 | } |
| 2182 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2183 | httpError(w, http.StatusBadRequest, "bad request") |
| 2184 | return |
| 2185 | } |
| 2186 | if !s.tokenOK(body.Token) { |
| 2187 | httpError(w, http.StatusForbidden, "not a member") |
| 2188 | return |
| 2189 | } |
| 2190 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2191 | if !ok || body.LabelBlob == "" || len(body.LabelBlob) > 4096 { |
| 2192 | httpError(w, http.StatusBadRequest, "bad request") |
| 2193 | return |
| 2194 | } |
| 2195 | if err := s.db.setUserLabelBlob(uid, body.LabelBlob); err != nil { |
| 2196 | httpError(w, http.StatusInternalServerError, "db error") |
| 2197 | return |
| 2198 | } |
| 2199 | out, _ := json.Marshal(map[string]any{"type": "label", "user_id": uid, "label_blob": body.LabelBlob}) |
| 2200 | s.hub.broadcast <- outbound{data: out} |
| 2201 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2202 | } |
| 2203 | |
| 2204 | // postLabelBackfill seals another member's LEGACY plaintext label under the |
| 2205 | // instance key (docs/no-plaintext.md): any member's client that holds the key |
| 2206 | // may do this on roster load, so one visit from anyone scrubs names members |
| 2207 | // left at rest before label_blob existed. The DB gate is strictly fill-once |
| 2208 | // (people only, plaintext still present, no existing blob), so an HONEST |
| 2209 | // client only re-encodes the name the server already stored. The server |
| 2210 | // cannot verify the blob's content (it has no key), so a malicious MEMBER |
| 2211 | // could seal a different name here — a deliberate, narrow trade: it needs a |
| 2212 | // roster member holding the instance key, it works once per legacy row only, |
| 2213 | // it touches nothing but a display name, and the victim re-setting their name |
| 2214 | // overrides it. The alternative (leaving inactive members' real names in |
| 2215 | // plaintext at rest, forever) loses to that. |
| 2216 | func (s *Server) postLabelBackfill(w http.ResponseWriter, r *http.Request) { |
| 2217 | var body struct { |
| 2218 | Token string `json:"token"` |
| 2219 | UserID string `json:"user_id"` |
| 2220 | LabelBlob string `json:"label_blob"` |
| 2221 | } |
| 2222 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2223 | httpError(w, http.StatusBadRequest, "bad request") |
| 2224 | return |
| 2225 | } |
| 2226 | if !s.tokenOK(body.Token) { |
| 2227 | httpError(w, http.StatusForbidden, "not a member") |
| 2228 | return |
| 2229 | } |
| 2230 | if body.UserID == "" || body.LabelBlob == "" || len(body.LabelBlob) > 4096 { |
| 2231 | httpError(w, http.StatusBadRequest, "bad request") |
| 2232 | return |
| 2233 | } |
| 2234 | filled, err := s.db.backfillUserLabelBlob(body.UserID, body.LabelBlob) |
| 2235 | if err != nil { |
| 2236 | httpError(w, http.StatusInternalServerError, "db error") |
| 2237 | return |
| 2238 | } |
| 2239 | if filled { |
| 2240 | out, _ := json.Marshal(map[string]any{"type": "label", "user_id": body.UserID, "label_blob": body.LabelBlob}) |
| 2241 | s.hub.broadcast <- outbound{data: out} |
| 2242 | } |
| 2243 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "filled": filled}) |
| 2244 | } |
| 2245 | |
| 2246 | // postAvatar sets the caller's profile photo (an encrypted blob id, or "" to clear). |
| 2247 | func (s *Server) postAvatar(w http.ResponseWriter, r *http.Request) { |
| 2248 | var body struct { |
| 2249 | Token string `json:"token"` |
| 2250 | BlobID string `json:"blob_id"` |
| 2251 | // The photo's alt text, encrypted under the instance key by the client |
| 2252 | // (opaque here, like the label blob). |
| 2253 | AltBlob string `json:"alt_blob"` |
| 2254 | } |
| 2255 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2256 | httpError(w, http.StatusBadRequest, "bad request") |
| 2257 | return |
| 2258 | } |
| 2259 | if !s.tokenOK(body.Token) { |
| 2260 | httpError(w, http.StatusForbidden, "not a member") |
| 2261 | return |
| 2262 | } |
| 2263 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2264 | if !ok || len(body.BlobID) > 200 || len(body.AltBlob) > 4096 { |
| 2265 | httpError(w, http.StatusBadRequest, "bad request") |
| 2266 | return |
| 2267 | } |
| 2268 | if err := s.db.setAvatar(uid, body.BlobID, body.AltBlob); err != nil { |
| 2269 | httpError(w, http.StatusInternalServerError, "db error") |
| 2270 | return |
| 2271 | } |
| 2272 | // Tell every connected client to refresh this user's avatar (profile photos |
| 2273 | // are instance-wide). members:nil → broadcast to everyone. |
| 2274 | out, _ := json.Marshal(map[string]any{"type": "avatar", "user_id": uid, "blob_id": body.BlobID, "alt_blob": body.AltBlob}) |
| 2275 | s.hub.broadcast <- outbound{data: out} |
| 2276 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2277 | } |
| 2278 | |
| 2279 | // postDescription sets the caller's own "about me" text, encrypted under the |
| 2280 | // instance key by their client ("" clears it). Opaque here, like the label blob. |
| 2281 | func (s *Server) postDescription(w http.ResponseWriter, r *http.Request) { |
| 2282 | var body struct { |
| 2283 | Token string `json:"token"` |
| 2284 | DescriptionBlob string `json:"description_blob"` |
| 2285 | } |
| 2286 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2287 | httpError(w, http.StatusBadRequest, "bad request") |
| 2288 | return |
| 2289 | } |
| 2290 | if !s.tokenOK(body.Token) { |
| 2291 | httpError(w, http.StatusForbidden, "not a member") |
| 2292 | return |
| 2293 | } |
| 2294 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2295 | if !ok || len(body.DescriptionBlob) > 4096 { |
| 2296 | httpError(w, http.StatusBadRequest, "bad request") |
| 2297 | return |
| 2298 | } |
| 2299 | if err := s.db.setUserDescriptionBlob(uid, body.DescriptionBlob); err != nil { |
| 2300 | httpError(w, http.StatusInternalServerError, "db error") |
| 2301 | return |
| 2302 | } |
| 2303 | out, _ := json.Marshal(map[string]any{"type": "description", "user_id": uid, "description_blob": body.DescriptionBlob}) |
| 2304 | s.hub.broadcast <- outbound{data: out} |
| 2305 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2306 | } |
| 2307 | |
| 2308 | // The caller's per-viewer name overrides (issue #577): one blob holding every |
| 2309 | // "I call them Dermo", sealed by the client to the caller's OWN public key. |
| 2310 | // Viewer-private user content — it never rides the roster and never broadcasts |
| 2311 | // (a nickname is nobody else's business, not even its subject's); only the |
| 2312 | // owner's devices, which share the keypair, can open it. Opaque here, as ever. |
| 2313 | func (s *Server) getNicknames(w http.ResponseWriter, r *http.Request) { |
| 2314 | token := r.URL.Query().Get("token") |
| 2315 | if !s.tokenOK(token) { |
| 2316 | httpError(w, http.StatusForbidden, "not a member") |
| 2317 | return |
| 2318 | } |
| 2319 | uid, ok := s.db.deviceTokenUser(token) |
| 2320 | if !ok { |
| 2321 | httpError(w, http.StatusForbidden, "not a member") |
| 2322 | return |
| 2323 | } |
| 2324 | blob, version, err := s.db.userNicknamesBlob(uid) |
| 2325 | if err != nil { |
| 2326 | httpError(w, http.StatusInternalServerError, "db error") |
| 2327 | return |
| 2328 | } |
| 2329 | writeJSON(w, http.StatusOK, map[string]any{"nicknames_blob": blob, "version": version}) |
| 2330 | } |
| 2331 | |
| 2332 | func (s *Server) postNicknames(w http.ResponseWriter, r *http.Request) { |
| 2333 | var body struct { |
| 2334 | Token string `json:"token"` |
| 2335 | NicknamesBlob string `json:"nicknames_blob"` |
| 2336 | // The version the writer last read (compare-and-swap). A pointer so |
| 2337 | // absent is distinguishable from 0: a pre-versioning client omits it |
| 2338 | // and keeps its unconditional write. |
| 2339 | Version *int64 `json:"version"` |
| 2340 | } |
| 2341 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2342 | httpError(w, http.StatusBadRequest, "bad request") |
| 2343 | return |
| 2344 | } |
| 2345 | if !s.tokenOK(body.Token) { |
| 2346 | httpError(w, http.StatusForbidden, "not a member") |
| 2347 | return |
| 2348 | } |
| 2349 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2350 | // One sealed entry is ~100 bytes of ciphertext; 64 KiB covers hundreds of |
| 2351 | // members with room to spare (the description's 4 KiB is one field, this |
| 2352 | // blob is a whole map). |
| 2353 | if !ok || len(body.NicknamesBlob) > 64*1024 { |
| 2354 | httpError(w, http.StatusBadRequest, "bad request") |
| 2355 | return |
| 2356 | } |
| 2357 | base := int64(-1) |
| 2358 | if body.Version != nil && *body.Version >= 0 { |
| 2359 | base = *body.Version |
| 2360 | } |
| 2361 | version, wrote, err := s.db.setUserNicknamesBlob(uid, body.NicknamesBlob, base) |
| 2362 | if err != nil { |
| 2363 | httpError(w, http.StatusInternalServerError, "db error") |
| 2364 | return |
| 2365 | } |
| 2366 | if !wrote { |
| 2367 | // Another device wrote since the caller's read — 409 with where the |
| 2368 | // row is now, so it can re-read, replay its queued ops, and retry. |
| 2369 | writeJSON(w, http.StatusConflict, map[string]any{"error": "version conflict", "version": version}) |
| 2370 | return |
| 2371 | } |
| 2372 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "version": version}) |
| 2373 | } |
| 2374 | |
| 2375 | // The caller's private moderation preferences (muted people, for now): one |
| 2376 | // blob sealed by the client to the caller's OWN public key, exactly like the |
| 2377 | // nicknames blob. Who you mute is nobody else's business — not the muted |
| 2378 | // person's, not the server's; only the owner's devices can open it. |
| 2379 | func (s *Server) getPrefs(w http.ResponseWriter, r *http.Request) { |
| 2380 | token := r.URL.Query().Get("token") |
| 2381 | if !s.tokenOK(token) { |
| 2382 | httpError(w, http.StatusForbidden, "not a member") |
| 2383 | return |
| 2384 | } |
| 2385 | uid, ok := s.db.deviceTokenUser(token) |
| 2386 | if !ok { |
| 2387 | httpError(w, http.StatusForbidden, "not a member") |
| 2388 | return |
| 2389 | } |
| 2390 | blob, version, err := s.db.userPrefsBlob(uid) |
| 2391 | if err != nil { |
| 2392 | httpError(w, http.StatusInternalServerError, "db error") |
| 2393 | return |
| 2394 | } |
| 2395 | writeJSON(w, http.StatusOK, map[string]any{"prefs_blob": blob, "version": version}) |
| 2396 | } |
| 2397 | |
| 2398 | func (s *Server) postPrefs(w http.ResponseWriter, r *http.Request) { |
| 2399 | var body struct { |
| 2400 | Token string `json:"token"` |
| 2401 | PrefsBlob string `json:"prefs_blob"` |
| 2402 | // The version the writer last read (compare-and-swap); absent skips |
| 2403 | // the check, like the nicknames blob. |
| 2404 | Version *int64 `json:"version"` |
| 2405 | } |
| 2406 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2407 | httpError(w, http.StatusBadRequest, "bad request") |
| 2408 | return |
| 2409 | } |
| 2410 | if !s.tokenOK(body.Token) { |
| 2411 | httpError(w, http.StatusForbidden, "not a member") |
| 2412 | return |
| 2413 | } |
| 2414 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2415 | // A muted-people set is one sealed entry per person (~100 bytes each); |
| 2416 | // 64 KiB is the same generous ceiling the nicknames blob uses. |
| 2417 | if !ok || len(body.PrefsBlob) > 64*1024 { |
| 2418 | httpError(w, http.StatusBadRequest, "bad request") |
| 2419 | return |
| 2420 | } |
| 2421 | base := int64(-1) |
| 2422 | if body.Version != nil && *body.Version >= 0 { |
| 2423 | base = *body.Version |
| 2424 | } |
| 2425 | version, wrote, err := s.db.setUserPrefsBlob(uid, body.PrefsBlob, base) |
| 2426 | if err != nil { |
| 2427 | httpError(w, http.StatusInternalServerError, "db error") |
| 2428 | return |
| 2429 | } |
| 2430 | if !wrote { |
| 2431 | writeJSON(w, http.StatusConflict, map[string]any{"error": "version conflict", "version": version}) |
| 2432 | return |
| 2433 | } |
| 2434 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "version": version}) |
| 2435 | } |
| 2436 | |
| 2437 | // postGroupDescription sets the space's description (admin only — the space's |
| 2438 | // self-portrait is a branding decision, like its name). Plaintext, like the |
| 2439 | // admin name/email: it must be editable from the keyless admin console and |
| 2440 | // readable on the join card before an invitee holds any key. "" clears it. |
| 2441 | func (s *Server) postGroupDescription(w http.ResponseWriter, r *http.Request) { |
| 2442 | if !s.requireAdmin(w, r) { |
| 2443 | return |
| 2444 | } |
| 2445 | if !s.requireUnsealed(w) { |
| 2446 | return |
| 2447 | } |
| 2448 | var body struct { |
| 2449 | Description string `json:"description"` |
| 2450 | } |
| 2451 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2452 | httpError(w, http.StatusBadRequest, "bad request") |
| 2453 | return |
| 2454 | } |
| 2455 | desc := strings.TrimSpace(body.Description) |
| 2456 | if len(desc) > 1000 { // ~500 chars even in multi-byte scripts |
| 2457 | httpError(w, http.StatusBadRequest, "too long") |
| 2458 | return |
| 2459 | } |
| 2460 | if err := s.db.setGroupDescription(desc); err != nil { |
| 2461 | httpError(w, http.StatusInternalServerError, "db error") |
| 2462 | return |
| 2463 | } |
| 2464 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "description": desc}) |
| 2465 | } |
| 2466 | |
| 2467 | // postThreadAvatar sets a group's photo (an encrypted blob id). Any member may. |
| 2468 | func (s *Server) postThreadAvatar(w http.ResponseWriter, r *http.Request) { |
| 2469 | var body struct { |
| 2470 | Token string `json:"token"` |
| 2471 | BlobID string `json:"blob_id"` |
| 2472 | } |
| 2473 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2474 | httpError(w, http.StatusBadRequest, "bad request") |
| 2475 | return |
| 2476 | } |
| 2477 | if !s.tokenOK(body.Token) { |
| 2478 | httpError(w, http.StatusForbidden, "not a member") |
| 2479 | return |
| 2480 | } |
| 2481 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2482 | if !ok || len(body.BlobID) > 200 { |
| 2483 | httpError(w, http.StatusBadRequest, "bad request") |
| 2484 | return |
| 2485 | } |
| 2486 | threadID := r.PathValue("id") |
| 2487 | if !s.db.threadMember(threadID, uid) { |
| 2488 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2489 | return |
| 2490 | } |
| 2491 | // Same fence as postThreadName: the space thread renders nowhere, so a |
| 2492 | // photo on it is only a scribble surface implicit membership would open. |
| 2493 | if s.db.threadKind(threadID) == "space" { |
| 2494 | httpError(w, http.StatusBadRequest, "the space thread has no photo") |
| 2495 | return |
| 2496 | } |
| 2497 | if err := s.db.setThreadAvatar(threadID, body.BlobID); err != nil { |
| 2498 | httpError(w, http.StatusInternalServerError, "db error") |
| 2499 | return |
| 2500 | } |
| 2501 | // Refresh the group photo for the thread's members (only they can see it). |
| 2502 | out, _ := json.Marshal(map[string]any{"type": "thread_avatar", "thread_id": threadID, "blob_id": body.BlobID}) |
| 2503 | s.broadcastToThread(threadID, out) |
| 2504 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2505 | } |
| 2506 | |
| 2507 | // postThreadLeave removes the caller from a thread. |
| 2508 | func (s *Server) postThreadLeave(w http.ResponseWriter, r *http.Request) { |
| 2509 | var body struct { |
| 2510 | Token string `json:"token"` |
| 2511 | } |
| 2512 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2513 | httpError(w, http.StatusBadRequest, "bad request") |
| 2514 | return |
| 2515 | } |
| 2516 | if !s.tokenOK(body.Token) { |
| 2517 | httpError(w, http.StatusForbidden, "not a member") |
| 2518 | return |
| 2519 | } |
| 2520 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2521 | if !ok { |
| 2522 | httpError(w, http.StatusForbidden, "no user for token") |
| 2523 | return |
| 2524 | } |
| 2525 | if err := s.db.removeThreadMember(r.PathValue("id"), uid); err != nil { |
| 2526 | httpError(w, http.StatusInternalServerError, "db error") |
| 2527 | return |
| 2528 | } |
| 2529 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2530 | } |
| 2531 | |
| 2532 | // postThreadHidden closes (hidden=true) or reopens (hidden=false) a chat for the |
| 2533 | // caller — a per-user marker that syncs across their devices. Any member may set |
| 2534 | // it on their own view; it never affects anyone else. |
| 2535 | func (s *Server) postThreadHidden(w http.ResponseWriter, r *http.Request) { |
| 2536 | var body struct { |
| 2537 | Token string `json:"token"` |
| 2538 | Hidden bool `json:"hidden"` |
| 2539 | } |
| 2540 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2541 | httpError(w, http.StatusBadRequest, "bad request") |
| 2542 | return |
| 2543 | } |
| 2544 | if !s.tokenOK(body.Token) { |
| 2545 | httpError(w, http.StatusForbidden, "not a member") |
| 2546 | return |
| 2547 | } |
| 2548 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2549 | if !ok { |
| 2550 | httpError(w, http.StatusForbidden, "no user for token") |
| 2551 | return |
| 2552 | } |
| 2553 | threadID := r.PathValue("id") |
| 2554 | if !s.db.threadMember(threadID, uid) { |
| 2555 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2556 | return |
| 2557 | } |
| 2558 | if err := s.db.setThreadHidden(uid, threadID, body.Hidden); err != nil { |
| 2559 | httpError(w, http.StatusInternalServerError, "db error") |
| 2560 | return |
| 2561 | } |
| 2562 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2563 | } |
| 2564 | |
| 2565 | // postThreadPinned pins (pinned=true) or unpins (pinned=false) a chat for the |
| 2566 | // caller — a per-user marker that syncs across their devices and floats the |
| 2567 | // thread to the top of their list. It never affects anyone else. |
| 2568 | func (s *Server) postThreadPinned(w http.ResponseWriter, r *http.Request) { |
| 2569 | var body struct { |
| 2570 | Token string `json:"token"` |
| 2571 | Pinned bool `json:"pinned"` |
| 2572 | } |
| 2573 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2574 | httpError(w, http.StatusBadRequest, "bad request") |
| 2575 | return |
| 2576 | } |
| 2577 | if !s.tokenOK(body.Token) { |
| 2578 | httpError(w, http.StatusForbidden, "not a member") |
| 2579 | return |
| 2580 | } |
| 2581 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2582 | if !ok { |
| 2583 | httpError(w, http.StatusForbidden, "no user for token") |
| 2584 | return |
| 2585 | } |
| 2586 | threadID := r.PathValue("id") |
| 2587 | if !s.db.threadMember(threadID, uid) { |
| 2588 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2589 | return |
| 2590 | } |
| 2591 | if err := s.db.setThreadPinned(uid, threadID, body.Pinned); err != nil { |
| 2592 | httpError(w, http.StatusInternalServerError, "db error") |
| 2593 | return |
| 2594 | } |
| 2595 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2596 | } |
| 2597 | |
| 2598 | // dmAllowed says whether `from` may open a NEW DM with `to`. Admins and bots |
| 2599 | // pass a closed door — the space's operator must stay reachable, and |
| 2600 | // onboarding speaks through Eleven's welcome DM — and the setting's UI copy |
| 2601 | // says so out loud rather than implying an absolute wall. |
| 2602 | func (s *Server) dmAllowed(from, to string) bool { |
| 2603 | // Admins and bots pass both doors — the operator must stay reachable (a |
| 2604 | // reported member could otherwise dodge a formal warning by blocking the |
| 2605 | // admin), and onboarding speaks through Eleven's welcome DM. |
| 2606 | if s.db.userRole(from) == "admin" || s.db.isAgent(from) { |
| 2607 | return true |
| 2608 | } |
| 2609 | // A block cuts contact in both directions, whoever asks (issue #578) — |
| 2610 | // the blocker unblocks first if they change their mind. |
| 2611 | if s.db.blockedEither(from, to) { |
| 2612 | return false |
| 2613 | } |
| 2614 | return s.db.userDMPrivacy(to) != "nobody" |
| 2615 | } |
| 2616 | |
| 2617 | // postDMPrivacy sets the caller's own DM door: "" / "everyone" (anyone in the |
| 2618 | // space may open a DM with them) or "nobody". Enforced at DM creation — see |
| 2619 | // dmAllowed. |
| 2620 | func (s *Server) postDMPrivacy(w http.ResponseWriter, r *http.Request) { |
| 2621 | var body struct { |
| 2622 | Token string `json:"token"` |
| 2623 | DMPrivacy string `json:"dm_privacy"` |
| 2624 | } |
| 2625 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2626 | httpError(w, http.StatusBadRequest, "bad request") |
| 2627 | return |
| 2628 | } |
| 2629 | if !s.tokenOK(body.Token) { |
| 2630 | httpError(w, http.StatusForbidden, "not a member") |
| 2631 | return |
| 2632 | } |
| 2633 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2634 | if !ok { |
| 2635 | httpError(w, http.StatusForbidden, "no user for token") |
| 2636 | return |
| 2637 | } |
| 2638 | v := body.DMPrivacy |
| 2639 | if v == "everyone" { |
| 2640 | v = "" // the default, stored lean |
| 2641 | } |
| 2642 | if v != "" && v != "nobody" { |
| 2643 | httpError(w, http.StatusBadRequest, "bad dm_privacy") |
| 2644 | return |
| 2645 | } |
| 2646 | if err := s.db.setUserDMPrivacy(uid, v); err != nil { |
| 2647 | httpError(w, http.StatusInternalServerError, "db error") |
| 2648 | return |
| 2649 | } |
| 2650 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "dm_privacy": v}) |
| 2651 | } |
| 2652 | |
| 2653 | // getBlocks lists who the caller has blocked — their own list only. |
| 2654 | func (s *Server) getBlocks(w http.ResponseWriter, r *http.Request) { |
| 2655 | token := r.URL.Query().Get("token") |
| 2656 | if !s.tokenOK(token) { |
| 2657 | httpError(w, http.StatusForbidden, "not a member") |
| 2658 | return |
| 2659 | } |
| 2660 | uid, ok := s.db.deviceTokenUser(token) |
| 2661 | if !ok { |
| 2662 | httpError(w, http.StatusForbidden, "no user for token") |
| 2663 | return |
| 2664 | } |
| 2665 | list, err := s.db.blocksOf(uid) |
| 2666 | if err != nil { |
| 2667 | httpError(w, http.StatusInternalServerError, "db error") |
| 2668 | return |
| 2669 | } |
| 2670 | writeJSON(w, http.StatusOK, map[string]any{"blocked": list}) |
| 2671 | } |
| 2672 | |
| 2673 | // postBlock blocks a member (issue #578): records the no-new-contact rule and |
| 2674 | // ends any existing DM with them (the closed-DM machinery, so message/edit/ |
| 2675 | // typing refusals and the closed banner all follow). The blocked party is |
| 2676 | // never told — they see the same silence and generic refusals a closed DM |
| 2677 | // door produces. |
| 2678 | func (s *Server) postBlock(w http.ResponseWriter, r *http.Request) { |
| 2679 | var body struct { |
| 2680 | Token string `json:"token"` |
| 2681 | UserID string `json:"user_id"` |
| 2682 | } |
| 2683 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2684 | httpError(w, http.StatusBadRequest, "bad request") |
| 2685 | return |
| 2686 | } |
| 2687 | if !s.tokenOK(body.Token) { |
| 2688 | httpError(w, http.StatusForbidden, "not a member") |
| 2689 | return |
| 2690 | } |
| 2691 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2692 | if !ok { |
| 2693 | httpError(w, http.StatusForbidden, "no user for token") |
| 2694 | return |
| 2695 | } |
| 2696 | if body.UserID == "" || body.UserID == uid || !s.db.userExists(body.UserID) { |
| 2697 | httpError(w, http.StatusBadRequest, "bad user_id") |
| 2698 | return |
| 2699 | } |
| 2700 | if err := s.db.setBlocked(uid, body.UserID, true); err != nil { |
| 2701 | httpError(w, http.StatusInternalServerError, "db error") |
| 2702 | return |
| 2703 | } |
| 2704 | // Block implies the conversation ends now, not at the next refusal. |
| 2705 | if tid, found, _ := s.db.dmThreadFor(uid, body.UserID); found { |
| 2706 | if closed, _ := s.db.dmClosed(tid); !closed { |
| 2707 | _ = s.db.closeDM(tid, uid) |
| 2708 | members, _ := s.db.memberUserIDs(tid) |
| 2709 | set := map[string]bool{} |
| 2710 | for _, m := range members { |
| 2711 | _ = s.db.setThreadHidden(m, tid, true) |
| 2712 | set[m] = true |
| 2713 | } |
| 2714 | out, _ := json.Marshal(map[string]any{"type": "dm_closed", "thread_id": tid}) |
| 2715 | s.hub.broadcast <- outbound{members: set, data: out} |
| 2716 | } |
| 2717 | } |
| 2718 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2719 | } |
| 2720 | |
| 2721 | // deleteBlock unblocks. Deliberately narrow: the DM stays closed (reopen is |
| 2722 | // its own step, through the other person's DM door) and any client-side mute |
| 2723 | // stays put — unblocking restores the possibility of contact, nothing more. |
| 2724 | func (s *Server) deleteBlock(w http.ResponseWriter, r *http.Request) { |
| 2725 | var body struct { |
| 2726 | Token string `json:"token"` |
| 2727 | } |
| 2728 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2729 | httpError(w, http.StatusBadRequest, "bad request") |
| 2730 | return |
| 2731 | } |
| 2732 | if !s.tokenOK(body.Token) { |
| 2733 | httpError(w, http.StatusForbidden, "not a member") |
| 2734 | return |
| 2735 | } |
| 2736 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2737 | if !ok { |
| 2738 | httpError(w, http.StatusForbidden, "no user for token") |
| 2739 | return |
| 2740 | } |
| 2741 | if err := s.db.setBlocked(uid, r.PathValue("id"), false); err != nil { |
| 2742 | httpError(w, http.StatusInternalServerError, "db error") |
| 2743 | return |
| 2744 | } |
| 2745 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2746 | } |
| 2747 | |
| 2748 | // postCloseDM ends a DM for both parties (issue #578): it drops off both |
| 2749 | // lists and the server refuses new traffic into it until someone reopens it. |
| 2750 | // Distinct from hiding (which quietly returns on activity) and from blocking |
| 2751 | // (which is about the person): closing is about this conversation. |
| 2752 | func (s *Server) postCloseDM(w http.ResponseWriter, r *http.Request) { |
| 2753 | var body struct { |
| 2754 | Token string `json:"token"` |
| 2755 | } |
| 2756 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2757 | httpError(w, http.StatusBadRequest, "bad request") |
| 2758 | return |
| 2759 | } |
| 2760 | if !s.tokenOK(body.Token) { |
| 2761 | httpError(w, http.StatusForbidden, "not a member") |
| 2762 | return |
| 2763 | } |
| 2764 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2765 | if !ok { |
| 2766 | httpError(w, http.StatusForbidden, "no user for token") |
| 2767 | return |
| 2768 | } |
| 2769 | threadID := r.PathValue("id") |
| 2770 | if !s.db.threadMember(threadID, uid) { |
| 2771 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2772 | return |
| 2773 | } |
| 2774 | if s.db.threadKind(threadID) != "dm" { |
| 2775 | httpError(w, http.StatusBadRequest, "not a dm") |
| 2776 | return |
| 2777 | } |
| 2778 | if err := s.db.closeDM(threadID, uid); err != nil { |
| 2779 | httpError(w, http.StatusInternalServerError, "db error") |
| 2780 | return |
| 2781 | } |
| 2782 | // Drop it from both lists (per-user hidden markers), and tell both sides' |
| 2783 | // live clients so open panes swap to the closed banner at once. |
| 2784 | members, _ := s.db.memberUserIDs(threadID) |
| 2785 | set := map[string]bool{} |
| 2786 | for _, m := range members { |
| 2787 | _ = s.db.setThreadHidden(m, threadID, true) |
| 2788 | set[m] = true |
| 2789 | } |
| 2790 | out, _ := json.Marshal(map[string]any{"type": "dm_closed", "thread_id": threadID}) |
| 2791 | s.hub.broadcast <- outbound{members: set, data: out} |
| 2792 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2793 | } |
| 2794 | |
| 2795 | // postReopenDM reopens a closed DM. Either side may — but through the other |
| 2796 | // person's DM door: if they've since closed DMs, reopening follows their |
| 2797 | // setting (the same dmAllowed gate as opening a fresh DM). |
| 2798 | func (s *Server) postReopenDM(w http.ResponseWriter, r *http.Request) { |
| 2799 | var body struct { |
| 2800 | Token string `json:"token"` |
| 2801 | } |
| 2802 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2803 | httpError(w, http.StatusBadRequest, "bad request") |
| 2804 | return |
| 2805 | } |
| 2806 | if !s.tokenOK(body.Token) { |
| 2807 | httpError(w, http.StatusForbidden, "not a member") |
| 2808 | return |
| 2809 | } |
| 2810 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2811 | if !ok { |
| 2812 | httpError(w, http.StatusForbidden, "no user for token") |
| 2813 | return |
| 2814 | } |
| 2815 | threadID := r.PathValue("id") |
| 2816 | if !s.db.threadMember(threadID, uid) { |
| 2817 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2818 | return |
| 2819 | } |
| 2820 | closed, _ := s.db.dmClosed(threadID) |
| 2821 | if !closed { |
| 2822 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) // already open |
| 2823 | return |
| 2824 | } |
| 2825 | other, _ := s.db.otherThreadMember(threadID, uid) |
| 2826 | if other != "" && !s.dmAllowed(uid, other) { |
| 2827 | httpError(w, http.StatusForbidden, "dms closed") |
| 2828 | return |
| 2829 | } |
| 2830 | if err := s.db.reopenDM(threadID); err != nil { |
| 2831 | httpError(w, http.StatusInternalServerError, "db error") |
| 2832 | return |
| 2833 | } |
| 2834 | // The reopener sees it again now; the other side stays hidden until the |
| 2835 | // first new message unhides it (insertMessage's clearThreadHidden). |
| 2836 | _ = s.db.setThreadHidden(uid, threadID, false) |
| 2837 | members, _ := s.db.memberUserIDs(threadID) |
| 2838 | set := map[string]bool{} |
| 2839 | for _, m := range members { |
| 2840 | set[m] = true |
| 2841 | } |
| 2842 | out, _ := json.Marshal(map[string]any{"type": "dm_reopened", "thread_id": threadID}) |
| 2843 | s.hub.broadcast <- outbound{members: set, data: out} |
| 2844 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2845 | } |
| 2846 | |
| 2847 | // postThreadMuted mutes (muted=true) or unmutes (muted=false) a chat for the |
| 2848 | // caller — a per-user marker that syncs across their devices. While set, the |
| 2849 | // push fan-out skips every one of their devices for this thread; the muted |
| 2850 | // thread's messages still arrive normally. It never affects anyone else, and |
| 2851 | // nobody else can see it. |
| 2852 | func (s *Server) postThreadMuted(w http.ResponseWriter, r *http.Request) { |
| 2853 | var body struct { |
| 2854 | Token string `json:"token"` |
| 2855 | Muted bool `json:"muted"` |
| 2856 | } |
| 2857 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2858 | httpError(w, http.StatusBadRequest, "bad request") |
| 2859 | return |
| 2860 | } |
| 2861 | if !s.tokenOK(body.Token) { |
| 2862 | httpError(w, http.StatusForbidden, "not a member") |
| 2863 | return |
| 2864 | } |
| 2865 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2866 | if !ok { |
| 2867 | httpError(w, http.StatusForbidden, "no user for token") |
| 2868 | return |
| 2869 | } |
| 2870 | threadID := r.PathValue("id") |
| 2871 | if !s.db.threadMember(threadID, uid) { |
| 2872 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2873 | return |
| 2874 | } |
| 2875 | if err := s.db.setThreadMuted(uid, threadID, body.Muted); err != nil { |
| 2876 | httpError(w, http.StatusInternalServerError, "db error") |
| 2877 | return |
| 2878 | } |
| 2879 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2880 | } |
| 2881 | |
| 2882 | // postThreadRead advances the caller's read watermark for a thread — "read |
| 2883 | // here, read everywhere". last_read_at is the time of the newest message the |
| 2884 | // device has shown; when the mark advances, it fans out over WebSocket to the |
| 2885 | // caller's OTHER connections so their unread dots clear live. Forward-only (a |
| 2886 | // lagging device can't re-light dots), per-user only (never other members), |
| 2887 | // and just a timestamp — the server still can't read anything. |
| 2888 | func (s *Server) postThreadRead(w http.ResponseWriter, r *http.Request) { |
| 2889 | var body struct { |
| 2890 | Token string `json:"token"` |
| 2891 | LastReadAt int64 `json:"last_read_at"` |
| 2892 | } |
| 2893 | if json.NewDecoder(r.Body).Decode(&body) != nil || body.LastReadAt <= 0 { |
| 2894 | httpError(w, http.StatusBadRequest, "bad request") |
| 2895 | return |
| 2896 | } |
| 2897 | if !s.tokenOK(body.Token) { |
| 2898 | httpError(w, http.StatusForbidden, "not a member") |
| 2899 | return |
| 2900 | } |
| 2901 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2902 | if !ok { |
| 2903 | httpError(w, http.StatusForbidden, "no user for token") |
| 2904 | return |
| 2905 | } |
| 2906 | threadID := r.PathValue("id") |
| 2907 | if !s.db.threadMember(threadID, uid) { |
| 2908 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2909 | return |
| 2910 | } |
| 2911 | advanced, err := s.db.setThreadRead(uid, threadID, body.LastReadAt) |
| 2912 | if err != nil { |
| 2913 | httpError(w, http.StatusInternalServerError, "db error") |
| 2914 | return |
| 2915 | } |
| 2916 | if advanced { |
| 2917 | out, _ := json.Marshal(wsReadOut{Type: "read", ThreadID: threadID, LastReadAt: body.LastReadAt}) |
| 2918 | s.hub.broadcast <- outbound{members: map[string]bool{uid: true}, data: out} |
| 2919 | } |
| 2920 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2921 | } |
| 2922 | |
| 2923 | // postThreadRemove removes another member from a group. Any member may remove |
| 2924 | // any other (matching how adding/renaming work today — the group is flat). Like |
| 2925 | // leaving, the key isn't rotated: the server just stops delivering to them. |
| 2926 | func (s *Server) postThreadRemove(w http.ResponseWriter, r *http.Request) { |
| 2927 | var body struct { |
| 2928 | Token string `json:"token"` |
| 2929 | UserID string `json:"user_id"` |
| 2930 | } |
| 2931 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 2932 | httpError(w, http.StatusBadRequest, "bad request") |
| 2933 | return |
| 2934 | } |
| 2935 | if !s.tokenOK(body.Token) { |
| 2936 | httpError(w, http.StatusForbidden, "not a member") |
| 2937 | return |
| 2938 | } |
| 2939 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 2940 | if !ok { |
| 2941 | httpError(w, http.StatusForbidden, "no user for token") |
| 2942 | return |
| 2943 | } |
| 2944 | threadID := r.PathValue("id") |
| 2945 | if !s.db.threadMember(threadID, uid) { |
| 2946 | httpError(w, http.StatusForbidden, "not a thread member") |
| 2947 | return |
| 2948 | } |
| 2949 | // Only groups: removing from a DM would break the one-thread-per-pair model. |
| 2950 | if s.db.threadKind(threadID) != "group" { |
| 2951 | httpError(w, http.StatusBadRequest, "can only remove people from a group") |
| 2952 | return |
| 2953 | } |
| 2954 | if body.UserID == "" || body.UserID == uid || !s.db.threadMember(threadID, body.UserID) { |
| 2955 | httpError(w, http.StatusBadRequest, "not a member of this group") // self uses /leave |
| 2956 | return |
| 2957 | } |
| 2958 | if err := s.db.removeThreadMember(threadID, body.UserID); err != nil { |
| 2959 | httpError(w, http.StatusInternalServerError, "db error") |
| 2960 | return |
| 2961 | } |
| 2962 | // Any member can remove in a flat group; only an ADMIN doing it is a |
| 2963 | // moderation action worth the audit log (issue #578) — ordinary member |
| 2964 | // removals would drown the log in group housekeeping. |
| 2965 | if s.db.userRole(uid) == "admin" { |
| 2966 | s.db.addAudit(uid, "thread.removed", body.UserID, threadID, "", "") |
| 2967 | } |
| 2968 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 2969 | } |
| 2970 | |
| 2971 | // ---- attachments -------------------------------------------------------- |
| 2972 | |
| 2973 | // validBlobID guards path building for a disk-backed blob: ids are randToken |
| 2974 | // (base64url), so anything with a path separator, dot, or other character is |
| 2975 | // bogus and rejected before it can reach the filesystem. |
| 2976 | func validBlobID(id string) bool { |
| 2977 | if id == "" || len(id) > 64 { |
| 2978 | return false |
| 2979 | } |
| 2980 | for _, c := range id { |
| 2981 | if !(c >= 'A' && c <= 'Z' || c >= 'a' && c <= 'z' || c >= '0' && c <= '9' || c == '-' || c == '_') { |
| 2982 | return false |
| 2983 | } |
| 2984 | } |
| 2985 | return true |
| 2986 | } |
| 2987 | |
| 2988 | func (s *Server) uploadBlob(w http.ResponseWriter, r *http.Request) { |
| 2989 | if !s.tokenOK(r.URL.Query().Get("token")) { |
| 2990 | httpError(w, http.StatusForbidden, "invalid invite") |
| 2991 | return |
| 2992 | } |
| 2993 | // Quota (disk backstop): refuse up front when the instance is already at its |
| 2994 | // storage ceiling, so a full disk can't be nudged further. |
| 2995 | if total, err := s.db.blobBytesTotal(); err == nil && total >= s.blobQuota { |
| 2996 | httpError(w, http.StatusInsufficientStorage, "storage full") |
| 2997 | return |
| 2998 | } |
| 2999 | r.Body = http.MaxBytesReader(w, r.Body, s.maxUpload) |
| 3000 | id, err := randToken() |
| 3001 | if err != nil { |
| 3002 | httpError(w, http.StatusInternalServerError, "id error") |
| 3003 | return |
| 3004 | } |
| 3005 | // Stream into a staged store write (never buffer a whole video in RAM); |
| 3006 | // commit under the id only once it's fully written, so a partial/aborted |
| 3007 | // upload is never served. The sha256 rides the same pass — it's the |
| 3008 | // integrity anchor the blob mirror/audit sweeps verify against (#992). |
| 3009 | blob, err := s.db.blobs.create() |
| 3010 | if err != nil { |
| 3011 | log.Printf("upload: blob create: %v", err) |
| 3012 | httpError(w, http.StatusInternalServerError, "storage error") |
| 3013 | return |
| 3014 | } |
| 3015 | hasher := sha256.New() |
| 3016 | size, err := io.Copy(io.MultiWriter(blob, hasher), r.Body) |
| 3017 | if err != nil { |
| 3018 | blob.abort() |
| 3019 | // MaxBytesReader trips here when the body exceeds the cap. |
| 3020 | httpError(w, http.StatusRequestEntityTooLarge, "file too large") |
| 3021 | return |
| 3022 | } |
| 3023 | if size == 0 { |
| 3024 | blob.abort() |
| 3025 | httpError(w, http.StatusBadRequest, "empty upload") |
| 3026 | return |
| 3027 | } |
| 3028 | // Re-check the quota against the real size now we have it. |
| 3029 | if total, err := s.db.blobBytesTotal(); err == nil && total+size > s.blobQuota { |
| 3030 | blob.abort() |
| 3031 | httpError(w, http.StatusInsufficientStorage, "storage full") |
| 3032 | return |
| 3033 | } |
| 3034 | if err := blob.commit(id); err != nil { |
| 3035 | log.Printf("upload: blob commit %s: %v", id, err) |
| 3036 | httpError(w, http.StatusInternalServerError, "storage error") |
| 3037 | return |
| 3038 | } |
| 3039 | // Tag with the (server-known, non-secret) thread id so the blob can be GC'd |
| 3040 | // with its thread / when the referencing message is deleted. Optional: avatar |
| 3041 | // uploads carry no thread. |
| 3042 | if err := s.db.recordBlob(id, r.URL.Query().Get("thread"), size, hex.EncodeToString(hasher.Sum(nil))); err != nil { |
| 3043 | _ = s.db.blobs.remove(id) |
| 3044 | httpError(w, http.StatusInternalServerError, "db error") |
| 3045 | return |
| 3046 | } |
| 3047 | s.kickBlobMirror() // a fresh blob mirrors promptly while the space is awake |
| 3048 | writeJSON(w, http.StatusOK, map[string]any{"id": id}) |
| 3049 | } |
| 3050 | |
| 3051 | func (s *Server) getBlobHandler(w http.ResponseWriter, r *http.Request) { |
| 3052 | if !s.tokenOK(r.URL.Query().Get("token")) { |
| 3053 | httpError(w, http.StatusForbidden, "invalid invite") |
| 3054 | return |
| 3055 | } |
| 3056 | id := r.PathValue("id") |
| 3057 | if !validBlobID(id) { |
| 3058 | http.NotFound(w, r) |
| 3059 | return |
| 3060 | } |
| 3061 | // Blob ids are unique and content is immutable, so it's safe to cache hard. |
| 3062 | w.Header().Set("Cache-Control", "private, max-age=31536000, immutable") |
| 3063 | // nosniff (set globally) stops a mistyped blob being sniffed as HTML; we serve |
| 3064 | // everything as opaque bytes. |
| 3065 | w.Header().Set("Content-Type", "application/octet-stream") |
| 3066 | // Store-backed (all new blobs): stream from the store. ServeContent gives |
| 3067 | // Range support + conditional requests for free (matters for large video), |
| 3068 | // and never loads the whole blob into RAM. |
| 3069 | if f, _, modTime, err := s.db.blobs.open(id); err == nil { |
| 3070 | defer f.Close() |
| 3071 | http.ServeContent(w, r, "", modTime, f) |
| 3072 | return |
| 3073 | } |
| 3074 | // Legacy: bytes still in the DB column (photos uploaded before disk-backing). |
| 3075 | data, err := s.db.legacyBlob(id) |
| 3076 | if err != nil { |
| 3077 | httpError(w, http.StatusInternalServerError, "db error") |
| 3078 | return |
| 3079 | } |
| 3080 | if data == nil { |
| 3081 | http.NotFound(w, r) |
| 3082 | return |
| 3083 | } |
| 3084 | w.Write(data) |
| 3085 | } |
| 3086 | |
| 3087 | // ---- link previews ------------------------------------------------------ |
| 3088 | |
| 3089 | func (s *Server) unfurl(w http.ResponseWriter, r *http.Request) { |
| 3090 | if !s.tokenOK(r.URL.Query().Get("token")) { |
| 3091 | httpError(w, http.StatusForbidden, "invalid invite") |
| 3092 | return |
| 3093 | } |
| 3094 | raw := strings.TrimSpace(r.URL.Query().Get("url")) |
| 3095 | u, err := url.Parse(raw) |
| 3096 | if err != nil || u.Host == "" || (u.Scheme != "http" && u.Scheme != "https") || len(raw) > 2048 { |
| 3097 | httpError(w, http.StatusBadRequest, "bad url") |
| 3098 | return |
| 3099 | } |
| 3100 | norm := u.String() |
| 3101 | // The member's own request already carries their Accept-Language; forward |
| 3102 | // it so the page unfurls in their language, not the fetching box's locale. |
| 3103 | lang := previewLang(r.Header.Get("Accept-Language")) |
| 3104 | |
| 3105 | // Cache hit: serve it now; if it's stale, refresh in the background. |
| 3106 | if pv, ok, _ := s.db.getLinkPreview(norm, lang); ok { |
| 3107 | writeJSON(w, http.StatusOK, pv) |
| 3108 | ttl := int64(previewFreshTTL) |
| 3109 | if !pv.OK { |
| 3110 | ttl = previewFailTTL |
| 3111 | } |
| 3112 | if time.Now().Unix()-pv.FetchedAt > ttl { |
| 3113 | go s.fetchAndCachePreview(norm, lang) |
| 3114 | } |
| 3115 | return |
| 3116 | } |
| 3117 | // Miss: fetch synchronously (de-duped), cache, return. |
| 3118 | writeJSON(w, http.StatusOK, s.fetchAndCachePreview(norm, lang)) |
| 3119 | } |
| 3120 | |
| 3121 | // previewFlight is one in-progress unfurl; concurrent requests for the same |
| 3122 | // URL+language wait on done and share pv rather than fetching again. |
| 3123 | type previewFlight struct { |
| 3124 | done chan struct{} |
| 3125 | pv LinkPreview |
| 3126 | } |
| 3127 | |
| 3128 | // fetchAndCachePreview fetches+stores a preview, ensuring only one fetch per |
| 3129 | // URL+language runs at a time. Concurrent callers WAIT for that fetch and get |
| 3130 | // its result — answering them with an empty stub instead is why a recipient |
| 3131 | // (whose render of a just-posted link races the poster's synchronous fetch) |
| 3132 | // never saw a card the poster did. The wait is bounded by fetchOG's timeout. |
| 3133 | func (s *Server) fetchAndCachePreview(norm, lang string) LinkPreview { |
| 3134 | flightKey := previewCacheKey(lang, norm) |
| 3135 | f := &previewFlight{done: make(chan struct{})} |
| 3136 | if cur, busy := s.inflight.LoadOrStore(flightKey, f); busy { |
| 3137 | flight := cur.(*previewFlight) |
| 3138 | <-flight.done |
| 3139 | return flight.pv |
| 3140 | } |
| 3141 | defer func() { |
| 3142 | s.inflight.Delete(flightKey) |
| 3143 | close(f.done) |
| 3144 | }() |
| 3145 | |
| 3146 | pv, err := fetchOG(norm, lang) |
| 3147 | if err != nil { |
| 3148 | pv = LinkPreview{URL: norm, OK: false} |
| 3149 | } |
| 3150 | pv.URL = norm |
| 3151 | pv.FetchedAt = time.Now().Unix() |
| 3152 | _ = s.db.putLinkPreview(pv, lang) |
| 3153 | f.pv = pv |
| 3154 | return pv |
| 3155 | } |
| 3156 | |
| 3157 | // ---- key-invites (invite redesign) -------------------------------------- |
| 3158 | |
| 3159 | // createKeyInvite stores a client-wrapped group key (the admin's browser did the |
| 3160 | // wrapping; the server never sees the secret or plaintext key). Creates a user |
| 3161 | // when no user_id is given (re-issue passes an existing user_id). |
| 3162 | // getBotConfig returns the caller's own agent config. The sidecar fetches this |
| 3163 | // with its device token to pick up console-managed model/prompt/docs; it's scoped |
| 3164 | // to the caller's user, so a bot only ever reads its own config. |
| 3165 | func (s *Server) getBotConfig(w http.ResponseWriter, r *http.Request) { |
| 3166 | token := r.URL.Query().Get("token") |
| 3167 | if !s.tokenOK(token) { |
| 3168 | httpError(w, http.StatusForbidden, "invalid invite") |
| 3169 | return |
| 3170 | } |
| 3171 | uid, ok := s.db.deviceTokenUser(token) |
| 3172 | if !ok { |
| 3173 | writeJSON(w, http.StatusOK, BotConfig{AIEnabled: s.db.aiEnabled()}) |
| 3174 | return |
| 3175 | } |
| 3176 | c, _, err := s.db.botConfig(uid) |
| 3177 | if err != nil { |
| 3178 | httpError(w, http.StatusInternalServerError, "db error") |
| 3179 | return |
| 3180 | } |
| 3181 | c.AIEnabled = s.db.aiEnabled() |
| 3182 | writeJSON(w, http.StatusOK, c) |
| 3183 | } |
| 3184 | |
| 3185 | // declareBotKind lets a sidecar self-report its identity's kind — "ai" (LLM-backed: |
| 3186 | // what it reads is sent to a model provider) or "bot" (deterministic: nothing |
| 3187 | // leaves the server). Authed by the bot's OWN device token, not the admin token: |
| 3188 | // it can only set its own kind, and only for an agent. This is why Eleven can |
| 3189 | // badge BOT when it runs commands-only and AI once its model brain is live — |
| 3190 | // the sidecar knows which, and the badge follows the truth. |
| 3191 | func (s *Server) declareBotKind(w http.ResponseWriter, r *http.Request) { |
| 3192 | var body struct { |
| 3193 | Token string `json:"token"` |
| 3194 | Kind string `json:"kind"` |
| 3195 | } |
| 3196 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3197 | httpError(w, http.StatusBadRequest, "bad request") |
| 3198 | return |
| 3199 | } |
| 3200 | if !s.tokenOK(body.Token) { |
| 3201 | httpError(w, http.StatusForbidden, "not a member") |
| 3202 | return |
| 3203 | } |
| 3204 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 3205 | if !ok || !s.db.isAgent(uid) { |
| 3206 | httpError(w, http.StatusBadRequest, "not a bot") |
| 3207 | return |
| 3208 | } |
| 3209 | if body.Kind != "ai" && body.Kind != "bot" { |
| 3210 | httpError(w, http.StatusBadRequest, "bad kind") |
| 3211 | return |
| 3212 | } |
| 3213 | if err := s.db.setBotKind(uid, body.Kind); err != nil { |
| 3214 | httpError(w, http.StatusInternalServerError, "db error") |
| 3215 | return |
| 3216 | } |
| 3217 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3218 | } |
| 3219 | |
| 3220 | func (s *Server) createKeyInvite(w http.ResponseWriter, r *http.Request) { |
| 3221 | if !s.requireAdmin(w, r) { |
| 3222 | return |
| 3223 | } |
| 3224 | var body struct { |
| 3225 | Label string `json:"label"` |
| 3226 | UserID string `json:"user_id"` |
| 3227 | ID string `json:"id"` |
| 3228 | Wrapped string `json:"wrapped"` |
| 3229 | ClaimHash string `json:"claim_hash"` // proof-of-secret for claiming (see deriveInvite) |
| 3230 | Expires int64 `json:"expires"` |
| 3231 | Agent bool `json:"agent"` // mark the invited user as a bot (badge only) |
| 3232 | // Agent config (only when Agent) — the sidecar applies these. |
| 3233 | Model string `json:"model"` |
| 3234 | SystemPrompt string `json:"system_prompt"` |
| 3235 | Docs string `json:"docs"` |
| 3236 | // Helpers catalog metadata (only when Agent): the one-line blurb members |
| 3237 | // see, and whether the bot shows in everyone's Helpers list (docs/bots.md). |
| 3238 | Description string `json:"description"` |
| 3239 | Available bool `json:"available_to_members"` |
| 3240 | // Listen mode (only when Agent): when the bot replies in groups — |
| 3241 | // ""/"mention" = @mention only (default), "name" = also on its bare name. |
| 3242 | Listen string `json:"listen"` |
| 3243 | // GrantsAdmin marks a setup invite: its claimer becomes an admin. Minted by |
| 3244 | // add-instance for a fresh instance's first user (and available to admins |
| 3245 | // for promoting someone at invite time). See docs/conversational-onboarding.md. |
| 3246 | GrantsAdmin bool `json:"grants_admin"` |
| 3247 | // HooksService marks the hooks sidecar's service identity invite |
| 3248 | // (add-hooks mints it — hooks.go, docs/webhooks.md): the claimer is |
| 3249 | // recorded in config so webhook creation knows which pubkey to seal |
| 3250 | // definitions to. Not an AI bot, so it bypasses the bots gate. |
| 3251 | HooksService bool `json:"hooks_service"` |
| 3252 | // TierID makes this a COHORT invite: the claimer is assigned that |
| 3253 | // access level on first-device claim ('invite' source). Admin-minted |
| 3254 | // only, which is what keeps level assignment an admin power. |
| 3255 | TierID string `json:"tier_id"` |
| 3256 | } |
| 3257 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3258 | httpError(w, http.StatusBadRequest, "bad request") |
| 3259 | return |
| 3260 | } |
| 3261 | // Wrapped is optional now: a fresh-person invite carries no key (the joiner |
| 3262 | // generates their own user keypair). Only an add-device invite wraps the |
| 3263 | // user's private key. See docs/threads-and-dms.md. |
| 3264 | if body.ID == "" || len(body.ID) > 200 || len(body.Wrapped) > 4096 || len(body.Description) > 300 || |
| 3265 | body.ClaimHash == "" || len(body.ClaimHash) > 128 { |
| 3266 | httpError(w, http.StatusBadRequest, "missing id") |
| 3267 | return |
| 3268 | } |
| 3269 | // The bots gate stops NEW bot identities being minted (checked before the |
| 3270 | // user row exists, so a rejected mint leaves nothing behind); bots already |
| 3271 | // on the roster keep running — the admin retires those by removal. The |
| 3272 | // hooks service identity is exempt: it's integration plumbing (no AI, no |
| 3273 | // conversations), gated instead by webhooks being admin-only. |
| 3274 | if body.Agent && !body.HooksService && !s.db.botsEnabled() { |
| 3275 | httpError(w, http.StatusForbidden, "bots are turned off for this space") |
| 3276 | return |
| 3277 | } |
| 3278 | userID := body.UserID |
| 3279 | if userID == "" { |
| 3280 | // A person gets no plaintext name — they publish theirs encrypted (under the |
| 3281 | // instance key) after joining, and the pre-fill name rides in the invite |
| 3282 | // link's #fragment. Only bots keep an admin-authored plaintext label. |
| 3283 | newLabel := "" |
| 3284 | if body.Agent { |
| 3285 | newLabel = strings.TrimSpace(body.Label) |
| 3286 | } |
| 3287 | id, err := s.db.createUser(newLabel) |
| 3288 | if err != nil { |
| 3289 | httpError(w, http.StatusInternalServerError, "db error") |
| 3290 | return |
| 3291 | } |
| 3292 | userID = id |
| 3293 | } else if !s.db.userExists(userID) { |
| 3294 | httpError(w, http.StatusBadRequest, "unknown user") |
| 3295 | return |
| 3296 | } |
| 3297 | if body.Agent { |
| 3298 | if body.Listen != "" && body.Listen != "mention" && body.Listen != "name" { |
| 3299 | httpError(w, http.StatusBadRequest, "bad listen") |
| 3300 | return |
| 3301 | } |
| 3302 | if err := s.db.setUserAgent(userID); err != nil { |
| 3303 | httpError(w, http.StatusInternalServerError, "db error") |
| 3304 | return |
| 3305 | } |
| 3306 | if err := s.db.setBotConfig(userID, body.Model, body.SystemPrompt, body.Docs, body.Listen, strings.TrimSpace(body.Description), body.Available); err != nil { |
| 3307 | httpError(w, http.StatusInternalServerError, "db error") |
| 3308 | return |
| 3309 | } |
| 3310 | if body.HooksService { |
| 3311 | // Record which identity webhook definitions seal to, and badge it |
| 3312 | // distinctly from conversational bots. Last mint wins — re-running |
| 3313 | // add-hooks after a lost session repoints creation at the fresh |
| 3314 | // identity (stale defs sealed to the old key simply stop deploying). |
| 3315 | if err := s.db.setConfig(hooksServiceUserKey, userID); err != nil { |
| 3316 | httpError(w, http.StatusInternalServerError, "db error") |
| 3317 | return |
| 3318 | } |
| 3319 | if err := s.db.setBotKind(userID, "webhook"); err != nil { |
| 3320 | httpError(w, http.StatusInternalServerError, "db error") |
| 3321 | return |
| 3322 | } |
| 3323 | } |
| 3324 | } |
| 3325 | if body.TierID != "" && !s.db.tierExists(body.TierID) { |
| 3326 | httpError(w, http.StatusBadRequest, "bad access level") |
| 3327 | return |
| 3328 | } |
| 3329 | if err := s.db.createKeyInvite(body.ID, userID, body.Wrapped, body.ClaimHash, body.Expires); err != nil { |
| 3330 | httpError(w, http.StatusInternalServerError, "db error") |
| 3331 | return |
| 3332 | } |
| 3333 | if body.GrantsAdmin { |
| 3334 | if err := s.db.setInviteGrantsAdmin(body.ID); err != nil { |
| 3335 | httpError(w, http.StatusInternalServerError, "db error") |
| 3336 | return |
| 3337 | } |
| 3338 | } |
| 3339 | if body.TierID != "" { |
| 3340 | if err := s.db.setInviteTier(body.ID, body.TierID); err != nil { |
| 3341 | httpError(w, http.StatusInternalServerError, "db error") |
| 3342 | return |
| 3343 | } |
| 3344 | } |
| 3345 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "user_id": userID}) |
| 3346 | } |
| 3347 | |
| 3348 | // getKeyInvite returns the wrapped key for an unused, unexpired invite. The id is |
| 3349 | // the client-derived handle; without the secret the wrapped blob is useless. |
| 3350 | func (s *Server) getKeyInvite(w http.ResponseWriter, r *http.Request) { |
| 3351 | ki, found, err := s.db.getKeyInvite(r.PathValue("id")) |
| 3352 | if err != nil { |
| 3353 | httpError(w, http.StatusInternalServerError, "db error") |
| 3354 | return |
| 3355 | } |
| 3356 | ok := found && !ki.Used && !ki.Expired |
| 3357 | resp := map[string]any{"ok": ok} |
| 3358 | if ok { |
| 3359 | resp["wrapped"] = ki.Wrapped |
| 3360 | // A user invite drops the joiner into a pending DM. The client uses this to |
| 3361 | // (a) re-wrap the DM key to itself and (b) know an existing member can adopt. |
| 3362 | resp["dm"] = ki.ThreadID != "" |
| 3363 | // A setup invite lands chat-first: the join page skips its name form (the |
| 3364 | // setup conversation asks instead). Only link-holders can derive the id, so |
| 3365 | // this flags nothing to anyone who couldn't claim it anyway. |
| 3366 | resp["grants_admin"] = ki.GrantsAdmin |
| 3367 | // The space's description, so the welcome card can say what this place is |
| 3368 | // before the joiner holds any key. Only link-holders can derive the invite |
| 3369 | // id, so this stays "invited people only" — it's never on the public read. |
| 3370 | if d := s.db.getGroupDescription(); d != "" { |
| 3371 | resp["description"] = d |
| 3372 | } |
| 3373 | // Sealed branding: the invite link's #fragment carries B, so the join |
| 3374 | // card decrypts the full branding set (name, description, avatar alt) |
| 3375 | // from this blob instead of the plaintext fields above. |
| 3376 | if s.db.brandingSealed() { |
| 3377 | blob, _, _ := s.db.getConfig("branding_blob") |
| 3378 | salt, _, _ := s.db.getConfig("branding_salt") |
| 3379 | resp["branding_blob"] = blob |
| 3380 | resp["branding_salt"] = salt |
| 3381 | } |
| 3382 | // A cohort invite says which access level the joiner lands in — the |
| 3383 | // level NAME is branding-class by design (plaintext space policy), and |
| 3384 | // like the description it's served to link-holders only. |
| 3385 | if ki.TierID != "" { |
| 3386 | if n := s.db.tierName(ki.TierID); n != "" { |
| 3387 | resp["tier_name"] = n |
| 3388 | } |
| 3389 | } |
| 3390 | // The suggested pre-fill name is NOT returned here — it rides in the invite |
| 3391 | // link's #fragment (never sent to the server), so the server never sees it. |
| 3392 | } |
| 3393 | writeJSON(w, http.StatusOK, resp) |
| 3394 | } |
| 3395 | |
| 3396 | // claimKeyInvite marks the invite used (single-use) and mints a device token for |
| 3397 | // ongoing auth. The secret never reaches the server — only this claim does. For a |
| 3398 | // user invite, `wrapped` is the pending DM's key wrapped to the joiner's own new |
| 3399 | // public key; we store it so they can read the DM straight away, and return the |
| 3400 | // thread id so the client opens it first. |
| 3401 | func (s *Server) claimKeyInvite(w http.ResponseWriter, r *http.Request) { |
| 3402 | var body struct { |
| 3403 | Wrapped string `json:"wrapped"` |
| 3404 | ClaimSecret string `json:"claim_secret"` |
| 3405 | } |
| 3406 | json.NewDecoder(r.Body).Decode(&body) |
| 3407 | if len(body.Wrapped) > 4096 { |
| 3408 | httpError(w, http.StatusBadRequest, "bad request") |
| 3409 | return |
| 3410 | } |
| 3411 | id := r.PathValue("id") |
| 3412 | // Grab the pending DM (if any) before the claim consumes the invite. |
| 3413 | ki, _, _ := s.db.getKeyInvite(id) |
| 3414 | // No plaintext device label: the joiner's screen name is never sent to the |
| 3415 | // server — they publish it encrypted (POST /api/label) after joining. |
| 3416 | tok, ok, err := s.db.claimKeyInvite(id, "", body.Wrapped, body.ClaimSecret) |
| 3417 | if err != nil { |
| 3418 | httpError(w, http.StatusInternalServerError, "db error") |
| 3419 | return |
| 3420 | } |
| 3421 | if !ok { |
| 3422 | httpError(w, http.StatusForbidden, "invite unavailable") |
| 3423 | return |
| 3424 | } |
| 3425 | resp := map[string]any{"ok": true, "token": tok} |
| 3426 | if ki.ThreadID != "" { |
| 3427 | resp["thread_id"] = ki.ThreadID |
| 3428 | } |
| 3429 | writeJSON(w, http.StatusOK, resp) |
| 3430 | } |
| 3431 | |
| 3432 | func (s *Server) listUsers(w http.ResponseWriter, r *http.Request) { |
| 3433 | if !s.requireAdmin(w, r) { |
| 3434 | return |
| 3435 | } |
| 3436 | users, err := s.db.listUsers() |
| 3437 | if err != nil { |
| 3438 | httpError(w, http.StatusInternalServerError, "db error") |
| 3439 | return |
| 3440 | } |
| 3441 | writeJSON(w, http.StatusOK, map[string]any{"users": users}) |
| 3442 | } |
| 3443 | |
| 3444 | // getAdminBotConfig returns a bot's full console-managed config (persona, |
| 3445 | // model, docs + Helpers-catalog metadata) so the admin can edit it after |
| 3446 | // creation. 400s for a non-agent — people don't have bot config. |
| 3447 | func (s *Server) getAdminBotConfig(w http.ResponseWriter, r *http.Request) { |
| 3448 | if !s.requireAdmin(w, r) { |
| 3449 | return |
| 3450 | } |
| 3451 | id := r.PathValue("id") |
| 3452 | if !s.db.isAgent(id) { |
| 3453 | httpError(w, http.StatusBadRequest, "not a bot") |
| 3454 | return |
| 3455 | } |
| 3456 | c, _, err := s.db.fullBotConfig(id) // ok=false → zero-value config, still editable |
| 3457 | if err != nil { |
| 3458 | httpError(w, http.StatusInternalServerError, "db error") |
| 3459 | return |
| 3460 | } |
| 3461 | writeJSON(w, http.StatusOK, c) |
| 3462 | } |
| 3463 | |
| 3464 | // setAdminBotConfig updates a bot's config in place. The sidecar re-pulls its |
| 3465 | // config on every reconnect (~a minute), so edits take effect without a |
| 3466 | // redeploy; catalog changes (description/availability) show in rosters |
| 3467 | // immediately. |
| 3468 | func (s *Server) setAdminBotConfig(w http.ResponseWriter, r *http.Request) { |
| 3469 | if !s.requireAdmin(w, r) { |
| 3470 | return |
| 3471 | } |
| 3472 | id := r.PathValue("id") |
| 3473 | if !s.db.isAgent(id) { |
| 3474 | httpError(w, http.StatusBadRequest, "not a bot") |
| 3475 | return |
| 3476 | } |
| 3477 | var body FullBotConfig |
| 3478 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3479 | httpError(w, http.StatusBadRequest, "bad request") |
| 3480 | return |
| 3481 | } |
| 3482 | if len(body.Description) > 300 { |
| 3483 | httpError(w, http.StatusBadRequest, "description too long") |
| 3484 | return |
| 3485 | } |
| 3486 | if body.Listen != "" && body.Listen != "mention" && body.Listen != "name" { |
| 3487 | httpError(w, http.StatusBadRequest, "bad listen") |
| 3488 | return |
| 3489 | } |
| 3490 | if len(body.Welcome) > 2000 { |
| 3491 | httpError(w, http.StatusBadRequest, "welcome too long") |
| 3492 | return |
| 3493 | } |
| 3494 | if err := s.db.setBotConfig(id, body.Model, body.SystemPrompt, body.Docs, body.Listen, strings.TrimSpace(body.Description), body.Available); err != nil { |
| 3495 | httpError(w, http.StatusInternalServerError, "db error") |
| 3496 | return |
| 3497 | } |
| 3498 | // Welcome text is a narrow upsert (see setBotWelcome) so it composes with the |
| 3499 | // config write above without widening setBotConfig's signature. |
| 3500 | if err := s.db.setBotWelcome(id, strings.TrimSpace(body.Welcome)); err != nil { |
| 3501 | httpError(w, http.StatusInternalServerError, "db error") |
| 3502 | return |
| 3503 | } |
| 3504 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3505 | } |
| 3506 | |
| 3507 | // renameUser changes a user's roster label (admin roster management — e.g. |
| 3508 | // renaming a bot after its default changes). Display only: keys and history |
| 3509 | // are untouched, and messages keep the name they were sent under (it's inside |
| 3510 | // the encrypted payload, which the server can't rewrite anyway). |
| 3511 | func (s *Server) renameUser(w http.ResponseWriter, r *http.Request) { |
| 3512 | if !s.requireAdmin(w, r) { |
| 3513 | return |
| 3514 | } |
| 3515 | var body struct { |
| 3516 | Label string `json:"label"` |
| 3517 | } |
| 3518 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3519 | httpError(w, http.StatusBadRequest, "bad request") |
| 3520 | return |
| 3521 | } |
| 3522 | label := strings.TrimSpace(body.Label) |
| 3523 | if label == "" || len(label) > 60 { |
| 3524 | httpError(w, http.StatusBadRequest, "bad label") |
| 3525 | return |
| 3526 | } |
| 3527 | // Only bots have an admin-settable plaintext name. A person's name is encrypted |
| 3528 | // under the instance key and set by the member themselves (POST /api/label), so |
| 3529 | // the admin can't (and shouldn't) rename people. |
| 3530 | if !s.db.isAgent(r.PathValue("id")) { |
| 3531 | httpError(w, http.StatusBadRequest, "people set their own name") |
| 3532 | return |
| 3533 | } |
| 3534 | if err := s.db.setUserLabel(r.PathValue("id"), label); err == sql.ErrNoRows { |
| 3535 | httpError(w, http.StatusBadRequest, "unknown user") |
| 3536 | return |
| 3537 | } else if err != nil { |
| 3538 | httpError(w, http.StatusInternalServerError, "db error") |
| 3539 | return |
| 3540 | } |
| 3541 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3542 | } |
| 3543 | |
| 3544 | // removeUser deletes a person from the instance (admin roster management). |
| 3545 | func (s *Server) removeUser(w http.ResponseWriter, r *http.Request) { |
| 3546 | if !s.requireAdmin(w, r) { |
| 3547 | return |
| 3548 | } |
| 3549 | if err := s.db.removeUser(r.PathValue("id")); err != nil { |
| 3550 | httpError(w, http.StatusInternalServerError, "db error") |
| 3551 | return |
| 3552 | } |
| 3553 | // Removal is a moderation action — it lands in the audit log (issue #578). |
| 3554 | s.db.addAudit(s.adminActor(r), "member.removed", r.PathValue("id"), "", "", "") |
| 3555 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3556 | } |
| 3557 | |
| 3558 | // banUser removes a member AND remembers their public key (issue #578), so |
| 3559 | // the same key can't re-register through any later invite — admin, member, or |
| 3560 | // cohort. removeUser's sweep already covers their content, tokens, queued |
| 3561 | // scheduled messages, and level memberships. |
| 3562 | func (s *Server) banUser(w http.ResponseWriter, r *http.Request) { |
| 3563 | if !s.requireAdmin(w, r) { |
| 3564 | return |
| 3565 | } |
| 3566 | uid := r.PathValue("id") |
| 3567 | if !s.db.userExists(uid) { |
| 3568 | httpError(w, http.StatusBadRequest, "no such user") |
| 3569 | return |
| 3570 | } |
| 3571 | // Capture the key BEFORE removal deletes the row; a keyless member (a |
| 3572 | // pending invitee) has nothing durable to ban — removal alone covers them. |
| 3573 | pub := s.db.userPublicKey(uid) |
| 3574 | if err := s.db.removeUser(uid); err != nil { |
| 3575 | httpError(w, http.StatusInternalServerError, "db error") |
| 3576 | return |
| 3577 | } |
| 3578 | if pub != "" { |
| 3579 | if err := s.db.addBan(pub, uid, s.adminActor(r)); err != nil { |
| 3580 | httpError(w, http.StatusInternalServerError, "db error") |
| 3581 | return |
| 3582 | } |
| 3583 | } |
| 3584 | s.db.addAudit(s.adminActor(r), "member.banned", uid, "", "", "") |
| 3585 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3586 | } |
| 3587 | |
| 3588 | // adminActor resolves who performed an admin action for the audit log: the |
| 3589 | // admin member's uid when the bearer is a device token, else "console" (the |
| 3590 | // break-glass admin token has no member identity). |
| 3591 | func (s *Server) adminActor(r *http.Request) string { |
| 3592 | const p = "Bearer " |
| 3593 | h := r.Header.Get("Authorization") |
| 3594 | if strings.HasPrefix(h, p) { |
| 3595 | if uid, ok := s.db.deviceTokenUser(strings.TrimSpace(strings.TrimPrefix(h, p))); ok { |
| 3596 | return uid |
| 3597 | } |
| 3598 | } |
| 3599 | return "console" |
| 3600 | } |
| 3601 | |
| 3602 | // postReport files a report (issue #578): queue metadata for the server, the |
| 3603 | // report's words sealed to each admin's public key by the reporter's client. |
| 3604 | // Reports are testimony — the server can't verify them, and the UI says so. |
| 3605 | func (s *Server) postReport(w http.ResponseWriter, r *http.Request) { |
| 3606 | var body struct { |
| 3607 | Token string `json:"token"` |
| 3608 | ReportedID string `json:"reported_id"` |
| 3609 | ThreadID string `json:"thread_id"` |
| 3610 | Blobs []struct { |
| 3611 | AdminID string `json:"admin_id"` |
| 3612 | Blob string `json:"blob"` |
| 3613 | } `json:"blobs"` |
| 3614 | } |
| 3615 | r.Body = http.MaxBytesReader(w, r.Body, 1<<20) |
| 3616 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3617 | httpError(w, http.StatusBadRequest, "bad request") |
| 3618 | return |
| 3619 | } |
| 3620 | if !s.tokenOK(body.Token) { |
| 3621 | httpError(w, http.StatusForbidden, "not a member") |
| 3622 | return |
| 3623 | } |
| 3624 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 3625 | if !ok { |
| 3626 | httpError(w, http.StatusForbidden, "no user for token") |
| 3627 | return |
| 3628 | } |
| 3629 | if body.ReportedID == "" || body.ReportedID == uid || !s.db.userExists(body.ReportedID) { |
| 3630 | httpError(w, http.StatusBadRequest, "bad reported_id") |
| 3631 | return |
| 3632 | } |
| 3633 | if body.ThreadID != "" && !s.db.threadMember(body.ThreadID, uid) { |
| 3634 | httpError(w, http.StatusForbidden, "not a thread member") |
| 3635 | return |
| 3636 | } |
| 3637 | // The report-abuse brake (content-blind): filing is cheap for a person, |
| 3638 | // expensive as a flood. Repeat-filer counts also surface in the queue. |
| 3639 | if s.db.reportsSince(uid, time.Now().Add(-time.Hour).Unix()) >= 5 { |
| 3640 | httpError(w, http.StatusTooManyRequests, "too many reports — try again later") |
| 3641 | return |
| 3642 | } |
| 3643 | // Every blob must be addressed to a current admin, and there must be at |
| 3644 | // least one — a report nobody can read helps no one. |
| 3645 | if len(body.Blobs) == 0 || len(body.Blobs) > 32 { |
| 3646 | httpError(w, http.StatusBadRequest, "bad blobs") |
| 3647 | return |
| 3648 | } |
| 3649 | blobs := map[string]string{} |
| 3650 | for _, b := range body.Blobs { |
| 3651 | if b.Blob == "" || len(b.Blob) > 64*1024 || s.db.userRole(b.AdminID) != "admin" { |
| 3652 | httpError(w, http.StatusBadRequest, "bad blobs") |
| 3653 | return |
| 3654 | } |
| 3655 | blobs[b.AdminID] = b.Blob |
| 3656 | } |
| 3657 | id, err := s.db.createReport(uid, body.ReportedID, body.ThreadID, blobs) |
| 3658 | if err != nil { |
| 3659 | httpError(w, http.StatusInternalServerError, "db error") |
| 3660 | return |
| 3661 | } |
| 3662 | // Nudge admins' live clients so the queue updates without a reload. |
| 3663 | admins, _ := s.db.adminUserIDs() |
| 3664 | if len(admins) > 0 { |
| 3665 | set := map[string]bool{} |
| 3666 | for _, a := range admins { |
| 3667 | set[a] = true |
| 3668 | } |
| 3669 | out, _ := json.Marshal(map[string]any{"type": "report_filed", "report_id": id}) |
| 3670 | s.hub.broadcast <- outbound{members: set, data: out} |
| 3671 | } |
| 3672 | // And their away devices, throttled — one push per burst, not one per report. |
| 3673 | go s.pushReportNotice() |
| 3674 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "id": id}) |
| 3675 | } |
| 3676 | |
| 3677 | // adminReports lists the moderation queue. The metadata is admin-auth like the |
| 3678 | // rest of /api/admin; the content blob in each row is the CALLER's sealed copy |
| 3679 | // (only an admin member's client holds the key to open it — the break-glass |
| 3680 | // console token sees metadata only, by construction). |
| 3681 | func (s *Server) adminReports(w http.ResponseWriter, r *http.Request) { |
| 3682 | if !s.requireAdmin(w, r) { |
| 3683 | return |
| 3684 | } |
| 3685 | actor := s.adminActor(r) |
| 3686 | reports, err := s.db.listReports(actor) |
| 3687 | if err != nil { |
| 3688 | httpError(w, http.StatusInternalServerError, "db error") |
| 3689 | return |
| 3690 | } |
| 3691 | writeJSON(w, http.StatusOK, map[string]any{"reports": reports}) |
| 3692 | } |
| 3693 | |
| 3694 | // resolveReportHandler records a report's outcome (the action itself — remove, |
| 3695 | // warn, demote — runs through its own endpoint first; this closes the loop). |
| 3696 | func (s *Server) resolveReportHandler(w http.ResponseWriter, r *http.Request) { |
| 3697 | if !s.requireAdmin(w, r) { |
| 3698 | return |
| 3699 | } |
| 3700 | var body struct { |
| 3701 | Action string `json:"action"` |
| 3702 | } |
| 3703 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3704 | httpError(w, http.StatusBadRequest, "bad request") |
| 3705 | return |
| 3706 | } |
| 3707 | switch body.Action { |
| 3708 | case "dismissed", "warned", "removed_thread", "removed_space", "demoted", "banned": |
| 3709 | default: |
| 3710 | httpError(w, http.StatusBadRequest, "bad action") |
| 3711 | return |
| 3712 | } |
| 3713 | id := r.PathValue("id") |
| 3714 | ok, err := s.db.resolveReport(id, body.Action, s.adminActor(r)) |
| 3715 | if err != nil { |
| 3716 | httpError(w, http.StatusInternalServerError, "db error") |
| 3717 | return |
| 3718 | } |
| 3719 | if !ok { |
| 3720 | httpError(w, http.StatusConflict, "already resolved") |
| 3721 | return |
| 3722 | } |
| 3723 | s.db.addAudit(s.adminActor(r), "report.resolved", "", "", id, body.Action) |
| 3724 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3725 | } |
| 3726 | |
| 3727 | // adminWarn records that a warning was issued (issue #578). The warning's |
| 3728 | // words travel as an ordinary E2EE DM from the admin's client with a `warn` |
| 3729 | // flag inside the ciphertext — the server records only that the rung was used. |
| 3730 | func (s *Server) adminWarn(w http.ResponseWriter, r *http.Request) { |
| 3731 | if !s.requireAdmin(w, r) { |
| 3732 | return |
| 3733 | } |
| 3734 | var body struct { |
| 3735 | UserID string `json:"user_id"` |
| 3736 | ReportID string `json:"report_id"` |
| 3737 | } |
| 3738 | if json.NewDecoder(r.Body).Decode(&body) != nil || body.UserID == "" { |
| 3739 | httpError(w, http.StatusBadRequest, "bad request") |
| 3740 | return |
| 3741 | } |
| 3742 | if !s.db.userExists(body.UserID) { |
| 3743 | httpError(w, http.StatusBadRequest, "no such user") |
| 3744 | return |
| 3745 | } |
| 3746 | s.db.addAudit(s.adminActor(r), "member.warned", body.UserID, "", body.ReportID, "") |
| 3747 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3748 | } |
| 3749 | |
| 3750 | // reportPushCooldown is the report notification's quiet window: the first |
| 3751 | // report of a burst notifies at once; everything else inside the window rides |
| 3752 | // silently (the notification's job is "go look", and each one carries the |
| 3753 | // current open count, so nothing is lost to the throttle). |
| 3754 | const reportPushCooldown = 15 * time.Minute |
| 3755 | |
| 3756 | // pushReportNotice tells the space's admins a report arrived — at most once |
| 3757 | // per quiet window. The words are server-composed metadata ("N waiting"), |
| 3758 | // never report content: the same plaintext-operational class as the changelog |
| 3759 | // announcement, delivered the same two ways (Web Push + APNs) and shown even |
| 3760 | // while the app is open (there's no in-app badge to lean on). Returns whether |
| 3761 | // this call was the one that notified, for the throttle test. |
| 3762 | func (s *Server) pushReportNotice() bool { |
| 3763 | s.reportPushMu.Lock() |
| 3764 | if time.Since(s.lastReportPush) < reportPushCooldown { |
| 3765 | s.reportPushMu.Unlock() |
| 3766 | return false |
| 3767 | } |
| 3768 | s.lastReportPush = time.Now() |
| 3769 | s.reportPushMu.Unlock() |
| 3770 | |
| 3771 | admins, err := s.db.adminUserIDs() |
| 3772 | if err != nil || len(admins) == 0 { |
| 3773 | return true // throttle consumed; nobody to tell |
| 3774 | } |
| 3775 | recipients := make(map[string]bool, len(admins)) |
| 3776 | for _, id := range admins { |
| 3777 | recipients[id] = true |
| 3778 | } |
| 3779 | n := s.db.openReportCount() |
| 3780 | title := "New report in " + s.db.getGroupName() |
| 3781 | body := "A report is waiting for review in the Admin panel." |
| 3782 | if n > 1 { |
| 3783 | body = fmt.Sprintf("%d reports are waiting for review in the Admin panel.", n) |
| 3784 | } |
| 3785 | payload, _ := json.Marshal(map[string]any{"report": true, "title": title, "body": body}) |
| 3786 | sent := s.sendToRecipients(payload, "report", "", false, recipients) |
| 3787 | sent += s.apnsAnnounce(title, body, recipients) |
| 3788 | // The same once-per-burst signal to LIVE admin sessions: each open device |
| 3789 | // lights the Admin thread's dot from this frame directly (a self-posted |
| 3790 | // bubble couldn't — your own messages never light your dots), and one |
| 3791 | // visible session writes the durable line into the Admin stream. |
| 3792 | frame, _ := json.Marshal(map[string]any{"type": "report_notice", "n": n}) |
| 3793 | s.hub.broadcast <- outbound{members: recipients, data: frame} |
| 3794 | log.Printf("reports: notified admins (%d subscription(s), %d open)", sent, n) |
| 3795 | return true |
| 3796 | } |
| 3797 | |
| 3798 | // adminAudit pages the moderation audit log, newest first. |
| 3799 | func (s *Server) adminAudit(w http.ResponseWriter, r *http.Request) { |
| 3800 | if !s.requireAdmin(w, r) { |
| 3801 | return |
| 3802 | } |
| 3803 | before, _ := strconv.ParseInt(r.URL.Query().Get("before"), 10, 64) |
| 3804 | limit, _ := strconv.Atoi(r.URL.Query().Get("limit")) |
| 3805 | entries, err := s.db.listAudit(before, limit) |
| 3806 | if err != nil { |
| 3807 | httpError(w, http.StatusInternalServerError, "db error") |
| 3808 | return |
| 3809 | } |
| 3810 | writeJSON(w, http.StatusOK, map[string]any{"entries": entries}) |
| 3811 | } |
| 3812 | |
| 3813 | // createDeviceInvite lets a member mint a fresh invite for their OWN account (to |
| 3814 | // add another device), authenticated by their existing token. The browser wraps |
| 3815 | // the key it already holds; the server stays blind. Ties to the device token's |
| 3816 | // user, or creates one for a legacy member. |
| 3817 | func (s *Server) createDeviceInvite(w http.ResponseWriter, r *http.Request) { |
| 3818 | var body struct { |
| 3819 | Token string `json:"token"` |
| 3820 | ID string `json:"id"` |
| 3821 | Wrapped string `json:"wrapped"` |
| 3822 | ClaimHash string `json:"claim_hash"` |
| 3823 | } |
| 3824 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3825 | httpError(w, http.StatusBadRequest, "bad request") |
| 3826 | return |
| 3827 | } |
| 3828 | if !s.tokenOK(body.Token) { |
| 3829 | httpError(w, http.StatusForbidden, "not a member") |
| 3830 | return |
| 3831 | } |
| 3832 | if body.ID == "" || body.Wrapped == "" || len(body.ID) > 200 || len(body.Wrapped) > 4096 || |
| 3833 | body.ClaimHash == "" || len(body.ClaimHash) > 128 { |
| 3834 | httpError(w, http.StatusBadRequest, "missing id/wrapped") |
| 3835 | return |
| 3836 | } |
| 3837 | userID, ok := s.db.deviceTokenUser(body.Token) |
| 3838 | if !ok { |
| 3839 | // Legacy member (joined via an old #k= link) — give them a user now. No |
| 3840 | // plaintext name: they republish it encrypted (POST /api/label) on next load. |
| 3841 | id, err := s.db.createUser("") |
| 3842 | if err != nil { |
| 3843 | httpError(w, http.StatusInternalServerError, "db error") |
| 3844 | return |
| 3845 | } |
| 3846 | userID = id |
| 3847 | } |
| 3848 | if err := s.db.createKeyInvite(body.ID, userID, body.Wrapped, body.ClaimHash, 0); err != nil { |
| 3849 | httpError(w, http.StatusInternalServerError, "db error") |
| 3850 | return |
| 3851 | } |
| 3852 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 3853 | } |
| 3854 | |
| 3855 | // postUserInvite lets a member invite a brand-new person straight into a DM. |
| 3856 | // Ordinary members are gated by the "users can invite" admin setting (off by |
| 3857 | // default); an admin may always invite. The browser |
| 3858 | // generates the DM key and hands us only wrapped blobs: `wrapped` is the key |
| 3859 | // encrypted to the invite secret (so the joiner recovers it), `self_wrapped` is it |
| 3860 | // wrapped to the inviter's own public key. With no thread_id we create the pending |
| 3861 | // invitee + DM + invite in one go; with a thread_id we re-issue a fresh link for an |
| 3862 | // existing pending invitee (a lost/expired link, same chat). The server stays blind. |
| 3863 | func (s *Server) postUserInvite(w http.ResponseWriter, r *http.Request) { |
| 3864 | var body struct { |
| 3865 | Token string `json:"token"` |
| 3866 | LabelBlob string `json:"label_blob"` // invitee's name, encrypted to the instance key by the inviter |
| 3867 | ID string `json:"id"` |
| 3868 | Wrapped string `json:"wrapped"` |
| 3869 | SelfWrapped string `json:"self_wrapped"` |
| 3870 | ClaimHash string `json:"claim_hash"` |
| 3871 | ThreadID string `json:"thread_id"` |
| 3872 | // TierID makes this a cohort invite (claimer lands in the level on |
| 3873 | // first-device claim). Role-admins only — level assignment is an |
| 3874 | // admin power, so a member invite can't smuggle anyone in. |
| 3875 | TierID string `json:"tier_id"` |
| 3876 | } |
| 3877 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3878 | httpError(w, http.StatusBadRequest, "bad request") |
| 3879 | return |
| 3880 | } |
| 3881 | if !s.tokenOK(body.Token) { |
| 3882 | httpError(w, http.StatusForbidden, "not a member") |
| 3883 | return |
| 3884 | } |
| 3885 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 3886 | if !ok { |
| 3887 | httpError(w, http.StatusForbidden, "no user for token") |
| 3888 | return |
| 3889 | } |
| 3890 | // The "members can invite" toggle governs ordinary members; an admin can |
| 3891 | // always invite. Without the bypass the person who just set the space up |
| 3892 | // couldn't bring anyone in without flipping the toggle in the admin |
| 3893 | // console — a path we're sunsetting. |
| 3894 | if !s.db.usersCanInvite() && s.db.userRole(uid) != "admin" { |
| 3895 | httpError(w, http.StatusForbidden, "inviting is turned off") |
| 3896 | return |
| 3897 | } |
| 3898 | // The invite-minting brake (issue #578): content-blind, admin-exempt — |
| 3899 | // nobody human mints twenty invites in a day by hand. |
| 3900 | if s.db.userRole(uid) != "admin" && !s.brake().invites.allow(uid) { |
| 3901 | httpError(w, http.StatusTooManyRequests, "that's a lot of invites — try again tomorrow") |
| 3902 | return |
| 3903 | } |
| 3904 | if body.ID == "" || len(body.ID) > 200 || body.Wrapped == "" || len(body.Wrapped) > 4096 || |
| 3905 | body.ClaimHash == "" || len(body.ClaimHash) > 128 { |
| 3906 | httpError(w, http.StatusBadRequest, "bad request") |
| 3907 | return |
| 3908 | } |
| 3909 | |
| 3910 | // Re-send: a fresh link for an existing pending invitee (same DM). Only the |
| 3911 | // inviter (a member of that pending DM) may, and only while it's still pending. |
| 3912 | if body.ThreadID != "" { |
| 3913 | if !s.db.threadMember(body.ThreadID, uid) || s.db.threadKind(body.ThreadID) != "dm" { |
| 3914 | httpError(w, http.StatusForbidden, "not your pending chat") |
| 3915 | return |
| 3916 | } |
| 3917 | invitee, found := s.db.otherThreadMember(body.ThreadID, uid) |
| 3918 | if !found { |
| 3919 | httpError(w, http.StatusBadRequest, "no invitee") |
| 3920 | return |
| 3921 | } |
| 3922 | // Only re-send while they're still a keyless placeholder. Once they've joined |
| 3923 | // (registered a public key), a fresh claimable invite for them would be an |
| 3924 | // account-takeover vector — and there's nothing to re-send anyway. |
| 3925 | if s.db.userPublicKey(invitee) != "" { |
| 3926 | httpError(w, http.StatusBadRequest, "they've already joined") |
| 3927 | return |
| 3928 | } |
| 3929 | if err := s.db.createKeyInviteWithThread(body.ID, invitee, body.Wrapped, body.ThreadID, body.ClaimHash, 0); err != nil { |
| 3930 | httpError(w, http.StatusInternalServerError, "db error") |
| 3931 | return |
| 3932 | } |
| 3933 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "thread_id": body.ThreadID, "user_id": invitee}) |
| 3934 | return |
| 3935 | } |
| 3936 | |
| 3937 | if body.LabelBlob == "" || len(body.LabelBlob) > 4096 || body.SelfWrapped == "" || len(body.SelfWrapped) > 4096 { |
| 3938 | httpError(w, http.StatusBadRequest, "bad request") |
| 3939 | return |
| 3940 | } |
| 3941 | // The flat-group rule applied to levels: membership is the power to |
| 3942 | // extend membership. Anyone may cohort-invite into a level THEY belong to |
| 3943 | // (they hold its key already — the server can't pretend otherwise); |
| 3944 | // admins may mint for any level. Nobody mints access they don't hold. |
| 3945 | if body.TierID != "" && !s.db.tierExists(body.TierID) { |
| 3946 | httpError(w, http.StatusBadRequest, "bad access level") |
| 3947 | return |
| 3948 | } |
| 3949 | if body.TierID != "" && s.db.userRole(uid) != "admin" && !s.db.tierMember(body.TierID, uid) { |
| 3950 | httpError(w, http.StatusForbidden, "not in that level") |
| 3951 | return |
| 3952 | } |
| 3953 | threadID, inviteeID, err := s.db.createUserInvite(uid, body.ID, body.LabelBlob, body.Wrapped, body.SelfWrapped, body.ClaimHash, 0) |
| 3954 | if err != nil { |
| 3955 | httpError(w, http.StatusInternalServerError, "db error") |
| 3956 | return |
| 3957 | } |
| 3958 | if body.TierID != "" { |
| 3959 | if err := s.db.setInviteTier(body.ID, body.TierID); err != nil { |
| 3960 | httpError(w, http.StatusInternalServerError, "db error") |
| 3961 | return |
| 3962 | } |
| 3963 | } |
| 3964 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "thread_id": threadID, "user_id": inviteeID}) |
| 3965 | } |
| 3966 | |
| 3967 | // adoptKeyInvite handles a user invite opened by someone who is ALREADY a member on |
| 3968 | // this device: their existing account joins the pending DM (deduped if they already |
| 3969 | // share one), instead of the placeholder becoming a new user. `wrapped` is the DM |
| 3970 | // key wrapped to their existing public key. Auth is their own device token. |
| 3971 | func (s *Server) adoptKeyInvite(w http.ResponseWriter, r *http.Request) { |
| 3972 | var body struct { |
| 3973 | Token string `json:"token"` |
| 3974 | Wrapped string `json:"wrapped"` |
| 3975 | ClaimSecret string `json:"claim_secret"` |
| 3976 | } |
| 3977 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 3978 | httpError(w, http.StatusBadRequest, "bad request") |
| 3979 | return |
| 3980 | } |
| 3981 | if !s.tokenOK(body.Token) { |
| 3982 | httpError(w, http.StatusForbidden, "not a member") |
| 3983 | return |
| 3984 | } |
| 3985 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 3986 | if !ok { |
| 3987 | httpError(w, http.StatusForbidden, "no user for token") |
| 3988 | return |
| 3989 | } |
| 3990 | // Check if this is an admin invite (no wrapped payload needed for admin invites). |
| 3991 | id := r.PathValue("id") |
| 3992 | ki, found, err := s.db.getKeyInvite(id) |
| 3993 | if err != nil || !found { |
| 3994 | httpError(w, http.StatusForbidden, "invite unavailable") |
| 3995 | return |
| 3996 | } |
| 3997 | if ki.GrantsAdmin { |
| 3998 | // Admin invite: promote the existing user to admin. |
| 3999 | if ok, err := s.db.adoptAdminInvite(id, uid, body.ClaimSecret); err != nil { |
| 4000 | httpError(w, http.StatusInternalServerError, "db error") |
| 4001 | return |
| 4002 | } else if !ok { |
| 4003 | httpError(w, http.StatusForbidden, "invite unavailable") |
| 4004 | return |
| 4005 | } |
| 4006 | // Unlike a fresh joiner's first key (which fires "joined"), promoting an |
| 4007 | // EXISTING member to admin touches no roster field a client watches for — |
| 4008 | // so every other open tab kept treating this user as a non-admin (e.g. |
| 4009 | // when building a report's admin-encryption list) until something else |
| 4010 | // happened to trigger a reload. Tell open tabs now. |
| 4011 | out, _ := json.Marshal(map[string]any{"type": "role_changed", "user_id": uid}) |
| 4012 | s.hub.broadcast <- outbound{data: out} |
| 4013 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4014 | return |
| 4015 | } |
| 4016 | // DM invite: wrapped key is required. |
| 4017 | if body.Wrapped == "" || len(body.Wrapped) > 4096 { |
| 4018 | httpError(w, http.StatusBadRequest, "bad request") |
| 4019 | return |
| 4020 | } |
| 4021 | threadID, ok, err := s.db.adoptUserInvite(id, uid, body.Wrapped, body.ClaimSecret) |
| 4022 | if err != nil { |
| 4023 | httpError(w, http.StatusInternalServerError, "db error") |
| 4024 | return |
| 4025 | } |
| 4026 | if !ok { |
| 4027 | httpError(w, http.StatusForbidden, "invite unavailable") |
| 4028 | return |
| 4029 | } |
| 4030 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "thread_id": threadID}) |
| 4031 | } |
| 4032 | |
| 4033 | // cancelInvite tears down a pending DM whose invitee never joined (thread, keys, |
| 4034 | // members, placeholder, invite). Only the inviter may, and only while it's pending. |
| 4035 | func (s *Server) cancelInvite(w http.ResponseWriter, r *http.Request) { |
| 4036 | var body struct { |
| 4037 | Token string `json:"token"` |
| 4038 | } |
| 4039 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 4040 | httpError(w, http.StatusBadRequest, "bad request") |
| 4041 | return |
| 4042 | } |
| 4043 | if !s.tokenOK(body.Token) { |
| 4044 | httpError(w, http.StatusForbidden, "not a member") |
| 4045 | return |
| 4046 | } |
| 4047 | uid, ok := s.db.deviceTokenUser(body.Token) |
| 4048 | if !ok { |
| 4049 | httpError(w, http.StatusForbidden, "no user for token") |
| 4050 | return |
| 4051 | } |
| 4052 | done, err := s.db.cancelUserInvite(r.PathValue("id"), uid) |
| 4053 | if err != nil { |
| 4054 | httpError(w, http.StatusInternalServerError, "db error") |
| 4055 | return |
| 4056 | } |
| 4057 | if !done { |
| 4058 | httpError(w, http.StatusBadRequest, "not a pending invite") |
| 4059 | return |
| 4060 | } |
| 4061 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4062 | } |
| 4063 | |
| 4064 | // ---- admin API ---------------------------------------------------------- |
| 4065 | |
| 4066 | func (s *Server) requireAdmin(w http.ResponseWriter, r *http.Request) bool { |
| 4067 | const p = "Bearer " |
| 4068 | h := r.Header.Get("Authorization") |
| 4069 | if strings.HasPrefix(h, p) { |
| 4070 | bearer := strings.TrimSpace(strings.TrimPrefix(h, p)) |
| 4071 | // Two ways in: the admin token (break-glass / provisioning), or a member's |
| 4072 | // own device token when their user holds the admin role — so the in-app |
| 4073 | // admin surface works with the session it already has. Either way this is |
| 4074 | // authorisation only; no key material rides on it. |
| 4075 | if s.db.checkAdmin(bearer) { |
| 4076 | return true |
| 4077 | } |
| 4078 | if uid, ok := s.db.deviceTokenUser(bearer); ok && s.db.userRole(uid) == "admin" { |
| 4079 | return true |
| 4080 | } |
| 4081 | } |
| 4082 | httpError(w, http.StatusUnauthorized, "admin auth required") |
| 4083 | return false |
| 4084 | } |
| 4085 | |
| 4086 | // ---- push notifications ------------------------------------------------- |
| 4087 | |
| 4088 | func (s *Server) getVAPID(w http.ResponseWriter, r *http.Request) { |
| 4089 | writeJSON(w, http.StatusOK, map[string]any{"publicKey": s.vapidPub}) |
| 4090 | } |
| 4091 | |
| 4092 | func (s *Server) subscribePush(w http.ResponseWriter, r *http.Request) { |
| 4093 | var body struct { |
| 4094 | Token string `json:"token"` |
| 4095 | Subscription struct { |
| 4096 | Endpoint string `json:"endpoint"` |
| 4097 | Keys struct { |
| 4098 | P256dh string `json:"p256dh"` |
| 4099 | Auth string `json:"auth"` |
| 4100 | } `json:"keys"` |
| 4101 | } `json:"subscription"` |
| 4102 | } |
| 4103 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 4104 | httpError(w, http.StatusBadRequest, "bad request") |
| 4105 | return |
| 4106 | } |
| 4107 | // Only valid participants (invite or device token) may register for push. |
| 4108 | if !s.tokenOK(body.Token) { |
| 4109 | httpError(w, http.StatusForbidden, "invalid invite") |
| 4110 | return |
| 4111 | } |
| 4112 | if body.Subscription.Endpoint == "" { |
| 4113 | httpError(w, http.StatusBadRequest, "missing subscription") |
| 4114 | return |
| 4115 | } |
| 4116 | // The endpoint is attacker-controlled and the server POSTs to it; reject |
| 4117 | // anything that isn't a plain https URL so it can't be aimed at our own |
| 4118 | // network (SSRF). The pushClient dialer enforces the resolved-IP check. |
| 4119 | if err := validatePushEndpoint(body.Subscription.Endpoint); err != nil { |
| 4120 | httpError(w, http.StatusBadRequest, "bad subscription endpoint") |
| 4121 | return |
| 4122 | } |
| 4123 | uid, _ := s.db.deviceTokenUser(body.Token) // "" for a legacy (non-device) token |
| 4124 | if err := s.db.addSubscription(PushSub{ |
| 4125 | Endpoint: body.Subscription.Endpoint, |
| 4126 | Token: body.Token, |
| 4127 | P256dh: body.Subscription.Keys.P256dh, |
| 4128 | Auth: body.Subscription.Keys.Auth, |
| 4129 | UserID: uid, |
| 4130 | }); err != nil { |
| 4131 | httpError(w, http.StatusInternalServerError, "db error") |
| 4132 | return |
| 4133 | } |
| 4134 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4135 | } |
| 4136 | |
| 4137 | func (s *Server) unsubscribePush(w http.ResponseWriter, r *http.Request) { |
| 4138 | var body struct { |
| 4139 | Token string `json:"token"` |
| 4140 | Endpoint string `json:"endpoint"` |
| 4141 | } |
| 4142 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 4143 | httpError(w, http.StatusBadRequest, "bad request") |
| 4144 | return |
| 4145 | } |
| 4146 | // Require a valid participant token and only remove that token's own |
| 4147 | // subscription — otherwise anyone who learned an endpoint could silently |
| 4148 | // unsubscribe (deny notifications to) someone else's device. |
| 4149 | if !s.tokenOK(body.Token) { |
| 4150 | httpError(w, http.StatusForbidden, "not a member") |
| 4151 | return |
| 4152 | } |
| 4153 | if body.Endpoint != "" { |
| 4154 | _ = s.db.deleteOwnSubscription(body.Endpoint, body.Token) |
| 4155 | } |
| 4156 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4157 | } |
| 4158 | |
| 4159 | func (s *Server) testPush(w http.ResponseWriter, r *http.Request) { |
| 4160 | if !s.requireAdmin(w, r) { |
| 4161 | return |
| 4162 | } |
| 4163 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "sent": s.sendTestPush()}) |
| 4164 | } |
| 4165 | |
| 4166 | // serveSW serves the service worker from the root path so its scope covers the app. |
| 4167 | func (s *Server) serveSW(w http.ResponseWriter, r *http.Request) { |
| 4168 | b, err := webFS.ReadFile("web/static/sw.js") |
| 4169 | if err != nil { |
| 4170 | http.NotFound(w, r) |
| 4171 | return |
| 4172 | } |
| 4173 | w.Header().Set("Content-Type", "application/javascript; charset=utf-8") |
| 4174 | w.Header().Set("Cache-Control", "no-cache") |
| 4175 | w.Write(b) |
| 4176 | } |
| 4177 | |
| 4178 | // serveManifest generates the PWA manifest with the configured group name, so the |
| 4179 | // Home Screen / install name matches the chat. |
| 4180 | func (s *Server) serveManifest(w http.ResponseWriter, r *http.Request) { |
| 4181 | name := s.db.getGroupName() |
| 4182 | w.Header().Set("Content-Type", "application/manifest+json; charset=utf-8") |
| 4183 | json.NewEncoder(w).Encode(map[string]any{ |
| 4184 | "name": name, |
| 4185 | "short_name": name, |
| 4186 | "description": "A private, end-to-end encrypted group chat", |
| 4187 | "start_url": "/", |
| 4188 | "scope": "/", |
| 4189 | "display": "standalone", |
| 4190 | "background_color": "#f6f7fb", |
| 4191 | "theme_color": "#5b6cff", |
| 4192 | "icons": []map[string]any{ |
| 4193 | {"src": "/static/icon-192.png", "sizes": "192x192", "type": "image/png", "purpose": "any"}, |
| 4194 | {"src": "/static/icon-512.png", "sizes": "512x512", "type": "image/png", "purpose": "any maskable"}, |
| 4195 | }, |
| 4196 | }) |
| 4197 | } |
| 4198 | |
| 4199 | // ---- group name --------------------------------------------------------- |
| 4200 | |
| 4201 | func (s *Server) getGroup(w http.ResponseWriter, r *http.Request) { |
| 4202 | // `avatar` lets clients decide whether to render /api/server-avatar without a |
| 4203 | // speculative image fetch (used by the join cards, home Save-passkey card, and |
| 4204 | // the native add-chat screens). |
| 4205 | _, _, _, hasAvatar := s.db.getInstanceAvatar() |
| 4206 | // name_set distinguishes an admin-chosen name from the compiled-in default, |
| 4207 | // so first-run setup asks for a name instead of offering "keep the default". |
| 4208 | out := map[string]any{"name": s.db.getGroupName(), "name_set": s.db.groupNameSet(), "avatar": hasAvatar} |
| 4209 | if hasAvatar { |
| 4210 | // The photo's alt text (plaintext branding, admin-set) — clients set it |
| 4211 | // on every rendering of /api/server-avatar, join cards included. |
| 4212 | alt, _, _ := s.db.getConfig("server_avatar_alt") |
| 4213 | out["avatar_alt"] = alt |
| 4214 | } |
| 4215 | // Sealed branding (docs/no-plaintext.md): the flag is public (join cards |
| 4216 | // need it to skip rendering ciphertext), but the blob + salt are NOT — |
| 4217 | // members get them below, and invitees get them via their unguessable |
| 4218 | // invite id (getKeyInvite). Serving ciphertext to bare visitors would only |
| 4219 | // widen the old plaintext gating: anyone could start the offline |
| 4220 | // brute-force, and any past link-holder could open the admin |
| 4221 | // name/email — a tier the plaintext era kept members-only. `name` above |
| 4222 | // already fell back to the compiled-in default (seal clears group_name). |
| 4223 | if s.db.brandingSealed() { |
| 4224 | out["sealed"] = true |
| 4225 | } |
| 4226 | // The administrator identity is member-only, not public branding: this |
| 4227 | // endpoint is also the unauthenticated onboarding read, so only add the |
| 4228 | // admin's name + contact email when a valid member token is presented. |
| 4229 | if s.tokenOK(r.URL.Query().Get("token")) { |
| 4230 | // Members get the sealed branding set plus the branding key wrapped |
| 4231 | // under the instance key, so nobody has to re-visit an invite link. |
| 4232 | if s.db.brandingSealed() { |
| 4233 | blob, _, _ := s.db.getConfig("branding_blob") |
| 4234 | salt, _, _ := s.db.getConfig("branding_salt") |
| 4235 | out["branding_blob"] = blob |
| 4236 | out["branding_salt"] = salt |
| 4237 | ks, _, _ := s.db.getConfig("branding_key_sealed") |
| 4238 | out["branding_key_sealed"] = ks |
| 4239 | } |
| 4240 | out["admin_name"] = s.db.getAdminName() |
| 4241 | out["admin_email"] = s.db.getAdminEmail() |
| 4242 | // The space description is member-gated like the admin identity: this |
| 4243 | // endpoint is also the public onboarding read, and invitees get the |
| 4244 | // description via their (unguessable) invite id instead — see getKeyInvite. |
| 4245 | out["description"] = s.db.getGroupDescription() |
| 4246 | // The feature gates ride the member read too — the native apps consult |
| 4247 | // them to hide entry points (the gated endpoints enforce regardless). |
| 4248 | out["ai_enabled"] = s.db.aiEnabled() |
| 4249 | out["bots_enabled"] = s.db.botsEnabled() |
| 4250 | out["apps_enabled"] = s.db.appsEnabled() |
| 4251 | out["member_apps_enabled"] = s.db.memberAppsEnabled() |
| 4252 | // The fetch service this instance prefers for unfurls (docs/fetch.md). |
| 4253 | // The web page gets it injected (__FETCH_URL__); native reads it here. |
| 4254 | out["fetch_url"] = s.fetchURL |
| 4255 | } |
| 4256 | writeJSON(w, http.StatusOK, out) |
| 4257 | } |
| 4258 | |
| 4259 | // ---- server avatar (instance branding photo) ---------------------------- |
| 4260 | // |
| 4261 | // A per-instance branding photo, admin-set and served in the clear like the |
| 4262 | // group name — it must render before any key exists (onboarding) and to the |
| 4263 | // instance-agnostic home server, so it can't be E2E-encrypted. Never user |
| 4264 | // content; message/profile-photo E2E is untouched. |
| 4265 | |
| 4266 | // getServerAvatar serves the branding photo unauthenticated (like getGroup). 404 |
| 4267 | // when unset so clients fall back to the built-in app icon. |
| 4268 | func (s *Server) getServerAvatar(w http.ResponseWriter, r *http.Request) { |
| 4269 | data, mime, updatedAt, ok := s.db.getInstanceAvatar() |
| 4270 | if !ok { |
| 4271 | http.NotFound(w, r) |
| 4272 | return |
| 4273 | } |
| 4274 | // ETag from the update stamp so an admin's change propagates but unchanged |
| 4275 | // photos revalidate cheaply. X-Content-Type-Options: nosniff is set globally. |
| 4276 | etag := fmt.Sprintf(`"%d"`, updatedAt) |
| 4277 | if match := r.Header.Get("If-None-Match"); match == etag { |
| 4278 | w.WriteHeader(http.StatusNotModified) |
| 4279 | return |
| 4280 | } |
| 4281 | w.Header().Set("Content-Type", mime) |
| 4282 | w.Header().Set("ETag", etag) |
| 4283 | w.Header().Set("Cache-Control", "public, max-age=60, must-revalidate") |
| 4284 | w.Write(data) |
| 4285 | } |
| 4286 | |
| 4287 | // setServerAvatar (admin) stores a new branding photo. The body is the raw image |
| 4288 | // bytes; the type is sniffed from the content, not trusted from a header. |
| 4289 | // While branding is sealed, photos go through sealBranding instead (the bytes |
| 4290 | // here would be readable at rest). |
| 4291 | func (s *Server) setServerAvatar(w http.ResponseWriter, r *http.Request) { |
| 4292 | if !s.requireAdmin(w, r) { |
| 4293 | return |
| 4294 | } |
| 4295 | if !s.requireUnsealed(w) { |
| 4296 | return |
| 4297 | } |
| 4298 | r.Body = http.MaxBytesReader(w, r.Body, maxServerAvatarBytes) |
| 4299 | data, err := io.ReadAll(r.Body) |
| 4300 | if err != nil { |
| 4301 | httpError(w, http.StatusRequestEntityTooLarge, "image too large (max 1 MB)") |
| 4302 | return |
| 4303 | } |
| 4304 | if len(data) == 0 { |
| 4305 | httpError(w, http.StatusBadRequest, "empty upload") |
| 4306 | return |
| 4307 | } |
| 4308 | // Sniff the real type rather than trusting the client. Only raster images we |
| 4309 | // know are safe to serve inline — no SVG (it can carry script). |
| 4310 | mime := http.DetectContentType(data) |
| 4311 | switch mime { |
| 4312 | case "image/png", "image/jpeg", "image/webp": |
| 4313 | default: |
| 4314 | httpError(w, http.StatusUnsupportedMediaType, "must be a PNG, JPEG, or WebP image") |
| 4315 | return |
| 4316 | } |
| 4317 | if err := s.db.setInstanceAvatar(data, mime, time.Now().Unix()); err != nil { |
| 4318 | httpError(w, http.StatusInternalServerError, "db error") |
| 4319 | return |
| 4320 | } |
| 4321 | // Optional alt text rides as a query param (the body is the raw image). |
| 4322 | // Plaintext branding like the photo itself — it must be readable on keyless |
| 4323 | // surfaces (the join card). A new photo always resets it (empty clears). |
| 4324 | if err := s.db.setConfig("server_avatar_alt", trimAltText(r.URL.Query().Get("alt"))); err != nil { |
| 4325 | httpError(w, http.StatusInternalServerError, "db error") |
| 4326 | return |
| 4327 | } |
| 4328 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4329 | } |
| 4330 | |
| 4331 | // deleteServerAvatar (admin) clears the branding photo (reverts to the app icon). |
| 4332 | func (s *Server) deleteServerAvatar(w http.ResponseWriter, r *http.Request) { |
| 4333 | if !s.requireAdmin(w, r) { |
| 4334 | return |
| 4335 | } |
| 4336 | if err := s.db.clearInstanceAvatar(); err != nil { |
| 4337 | httpError(w, http.StatusInternalServerError, "db error") |
| 4338 | return |
| 4339 | } |
| 4340 | _ = s.db.setConfig("server_avatar_alt", "") // the alt text goes with the photo |
| 4341 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4342 | } |
| 4343 | |
| 4344 | func (s *Server) setGroup(w http.ResponseWriter, r *http.Request) { |
| 4345 | if !s.requireAdmin(w, r) { |
| 4346 | return |
| 4347 | } |
| 4348 | if !s.requireUnsealed(w) { |
| 4349 | return |
| 4350 | } |
| 4351 | var body struct { |
| 4352 | Name string `json:"name"` |
| 4353 | AdminName string `json:"admin_name"` |
| 4354 | AdminEmail string `json:"admin_email"` |
| 4355 | } |
| 4356 | json.NewDecoder(r.Body).Decode(&body) |
| 4357 | name := strings.TrimSpace(body.Name) |
| 4358 | if name == "" || len(name) > 60 { |
| 4359 | httpError(w, http.StatusBadRequest, "name must be 1–60 characters") |
| 4360 | return |
| 4361 | } |
| 4362 | // The administrator name + contact email are optional (empty clears them). |
| 4363 | adminName := strings.TrimSpace(body.AdminName) |
| 4364 | adminEmail := strings.TrimSpace(body.AdminEmail) |
| 4365 | if len(adminName) > 60 { |
| 4366 | httpError(w, http.StatusBadRequest, "administrator name must be at most 60 characters") |
| 4367 | return |
| 4368 | } |
| 4369 | // A light sanity check, not full RFC validation: a contact email should look |
| 4370 | // like one (an @ with something either side) and stay short. |
| 4371 | if adminEmail != "" && (len(adminEmail) > 120 || !isRoughEmail(adminEmail)) { |
| 4372 | httpError(w, http.StatusBadRequest, "contact email doesn't look valid") |
| 4373 | return |
| 4374 | } |
| 4375 | if err := s.db.setGroupName(name); err != nil { |
| 4376 | httpError(w, http.StatusInternalServerError, "db error") |
| 4377 | return |
| 4378 | } |
| 4379 | if err := s.db.setAdminName(adminName); err != nil { |
| 4380 | httpError(w, http.StatusInternalServerError, "db error") |
| 4381 | return |
| 4382 | } |
| 4383 | if err := s.db.setAdminEmail(adminEmail); err != nil { |
| 4384 | httpError(w, http.StatusInternalServerError, "db error") |
| 4385 | return |
| 4386 | } |
| 4387 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "name": name, "admin_name": adminName, "admin_email": adminEmail}) |
| 4388 | } |
| 4389 | |
| 4390 | // applySeededName seeds the space's name from LCHAT_GROUP_NAME — the create |
| 4391 | // flow asks for the name up front now, and the provisioner delivers it via the |
| 4392 | // instance env (control.go writes it at add-instance). Seed-only, never an |
| 4393 | // override: a name the admin has since changed (or sealed) always wins, so |
| 4394 | // restarts can't clobber it. The setup conversation composes with this — it |
| 4395 | // offers "Keep "{name}"" when a name is already set rather than asking cold. |
| 4396 | func applySeededName(db *DB) error { |
| 4397 | name := strings.TrimSpace(os.Getenv("LCHAT_GROUP_NAME")) |
| 4398 | if name == "" || db.groupNameSet() { |
| 4399 | return nil |
| 4400 | } |
| 4401 | // The create path caps at 60 too; belt-and-suspenders, at a rune boundary. |
| 4402 | if len(name) > 60 { |
| 4403 | cut := 60 |
| 4404 | for cut > 0 && !utf8.RuneStart(name[cut]) { |
| 4405 | cut-- |
| 4406 | } |
| 4407 | name = strings.TrimSpace(name[:cut]) |
| 4408 | } |
| 4409 | if name == "" { |
| 4410 | return nil |
| 4411 | } |
| 4412 | return db.setGroupName(name) |
| 4413 | } |
| 4414 | |
| 4415 | // applySkipSetup is a TEST/DEV convenience (LCHAT_SKIP_SETUP=1): mark the |
| 4416 | // first-run setup conversation complete and seed workable defaults, so a |
| 4417 | // scratch instance is usable the moment its setup link is claimed — the |
| 4418 | // claimer still becomes the admin, they just skip the conversation. Values an |
| 4419 | // admin can change are seeded only when unset, so restarts never clobber |
| 4420 | // in-test edits. Never set this on a real instance: it forfeits onboarding. |
| 4421 | func applySkipSetup(db *DB) error { |
| 4422 | if strings.TrimSpace(os.Getenv("LCHAT_SKIP_SETUP")) == "" { |
| 4423 | return nil |
| 4424 | } |
| 4425 | log.Printf("LCHAT_SKIP_SETUP set: first-run setup conversation disabled (test/dev)") |
| 4426 | if err := db.setSetupComplete(true); err != nil { |
| 4427 | return err |
| 4428 | } |
| 4429 | // applySeededName already consumed LCHAT_GROUP_NAME; this only backfills the |
| 4430 | // dev default when nothing named the space at all. |
| 4431 | if !db.groupNameSet() { |
| 4432 | if err := db.setGroupName("Test Space"); err != nil { |
| 4433 | return err |
| 4434 | } |
| 4435 | } |
| 4436 | // Members can invite — the joiner flow is usually what a test instance is for. |
| 4437 | if _, ok, _ := db.getConfig("user_invites_enabled"); !ok { |
| 4438 | if err := db.setUsersCanInvite(true); err != nil { |
| 4439 | return err |
| 4440 | } |
| 4441 | } |
| 4442 | return nil |
| 4443 | } |
| 4444 | |
| 4445 | // trimAltText caps the photo's alt text at a RUNE boundary — a plain byte slice |
| 4446 | // mid-emoji would store invalid UTF-8 and render as U+FFFD on the join card. |
| 4447 | func trimAltText(s string) string { |
| 4448 | s = strings.TrimSpace(s) |
| 4449 | if len(s) <= 300 { |
| 4450 | return s |
| 4451 | } |
| 4452 | cut := 300 |
| 4453 | for cut > 0 && !utf8.RuneStart(s[cut]) { |
| 4454 | cut-- |
| 4455 | } |
| 4456 | return s[:cut] |
| 4457 | } |
| 4458 | |
| 4459 | // isRoughEmail is a deliberately loose check — just enough to reject obvious |
| 4460 | // typos in the admin's optional contact address without pretending to validate |
| 4461 | // deliverability. "a@b.c" passes; "not an email" doesn't. |
| 4462 | func isRoughEmail(s string) bool { |
| 4463 | at := strings.IndexByte(s, '@') |
| 4464 | if at <= 0 || at == len(s)-1 { |
| 4465 | return false |
| 4466 | } |
| 4467 | return strings.Contains(s[at+1:], ".") && !strings.ContainsAny(s, " \t\n") |
| 4468 | } |
| 4469 | |
| 4470 | // ---- instance settings (admin) ------------------------------------------ |
| 4471 | |
| 4472 | // getSettings returns the instance settings the admin console manages. |
| 4473 | func (s *Server) getSettings(w http.ResponseWriter, r *http.Request) { |
| 4474 | if !s.requireAdmin(w, r) { |
| 4475 | return |
| 4476 | } |
| 4477 | writeJSON(w, http.StatusOK, map[string]any{ |
| 4478 | "user_invites": s.db.usersCanInvite(), |
| 4479 | "ai_enabled": s.db.aiEnabled(), |
| 4480 | "bots_enabled": s.db.botsEnabled(), |
| 4481 | "apps_enabled": s.db.appsEnabled(), |
| 4482 | "member_apps_enabled": s.db.memberAppsEnabled(), |
| 4483 | "space_installs_admins": s.db.spaceInstallsAdmins(), |
| 4484 | "admin_name": s.db.getAdminName(), |
| 4485 | "admin_email": s.db.getAdminEmail(), |
| 4486 | "description": s.db.getGroupDescription(), |
| 4487 | "setup_complete": s.db.setupComplete(), |
| 4488 | "update_auto": s.db.updateAuto(), |
| 4489 | "update_download": s.db.updateDownload(), |
| 4490 | "update_channel": s.db.updateChannel(), |
| 4491 | "update_pin": s.db.updatePin(), |
| 4492 | "update_major": s.db.updateMajor(), |
| 4493 | "update": s.updateInfo(), |
| 4494 | }) |
| 4495 | } |
| 4496 | |
| 4497 | // setSettings toggles instance settings. Fields are pointers so an omitted field |
| 4498 | // is left unchanged (a partial update). |
| 4499 | func (s *Server) setSettings(w http.ResponseWriter, r *http.Request) { |
| 4500 | if !s.requireAdmin(w, r) { |
| 4501 | return |
| 4502 | } |
| 4503 | var body struct { |
| 4504 | UserInvites *bool `json:"user_invites"` |
| 4505 | // The feature gates (default on; see db.go): AI replies, bot creation, |
| 4506 | // apps, and members building their own apps. Enforcement lives at the |
| 4507 | // gated endpoints. |
| 4508 | AIEnabled *bool `json:"ai_enabled"` |
| 4509 | BotsEnabled *bool `json:"bots_enabled"` |
| 4510 | AppsEnabled *bool `json:"apps_enabled"` |
| 4511 | MemberAppsEnabled *bool `json:"member_apps_enabled"` |
| 4512 | // Space-install policy: true = only admins may add apps for everyone. |
| 4513 | SpaceInstallsAdmins *bool `json:"space_installs_admins"` |
| 4514 | // The setup conversation marks itself done (or the admin dismisses it). |
| 4515 | SetupComplete *bool `json:"setup_complete"` |
| 4516 | // The photo's alt text, editable without re-uploading the image (the |
| 4517 | // admin panel's alt field). Plaintext branding, like the photo itself. |
| 4518 | AvatarAlt *string `json:"avatar_alt"` |
| 4519 | // Auto-update prefs (docs/server-releases.md); the box updater acts on |
| 4520 | // them, the instance just stores + reports them. |
| 4521 | UpdateAuto *bool `json:"update_auto"` |
| 4522 | UpdateDownload *bool `json:"update_download"` |
| 4523 | UpdateChannel *string `json:"update_channel"` |
| 4524 | // Pin to one exact version ("" clears): the updater skips a pinned |
| 4525 | // instance entirely. Set by `lchat update pin` / `deploy --pin`; cleared |
| 4526 | // from the admin UI by picking a channel. |
| 4527 | UpdatePin *string `json:"update_pin"` |
| 4528 | // Stay on one major version ("" clears): minors/patches follow the |
| 4529 | // channel, a major bump holds until the admin raises this. |
| 4530 | UpdateMajor *string `json:"update_major"` |
| 4531 | } |
| 4532 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 4533 | httpError(w, http.StatusBadRequest, "bad request") |
| 4534 | return |
| 4535 | } |
| 4536 | // Validate everything before writing anything, so a rejected request never |
| 4537 | // half-applies (fields are independent config keys, not one transaction). |
| 4538 | if body.UpdateChannel != nil && !validChannel(*body.UpdateChannel) { |
| 4539 | httpError(w, http.StatusBadRequest, "unknown channel (edge, beta, or stable)") |
| 4540 | return |
| 4541 | } |
| 4542 | if body.UpdatePin != nil && *body.UpdatePin != "" && !validVersion(*body.UpdatePin) { |
| 4543 | httpError(w, http.StatusBadRequest, "invalid pin version") |
| 4544 | return |
| 4545 | } |
| 4546 | if body.UpdateMajor != nil && !validMajor(*body.UpdateMajor) { |
| 4547 | httpError(w, http.StatusBadRequest, "invalid major version (a number, or empty to follow everything)") |
| 4548 | return |
| 4549 | } |
| 4550 | if body.UserInvites != nil { |
| 4551 | was := s.db.usersCanInvite() |
| 4552 | if err := s.db.setUsersCanInvite(*body.UserInvites); err != nil { |
| 4553 | httpError(w, http.StatusInternalServerError, "db error") |
| 4554 | return |
| 4555 | } |
| 4556 | // The invite pause is the moderation panic switch (issue #578) — |
| 4557 | // flips get a paper trail like every other moderation action. |
| 4558 | if was != *body.UserInvites { |
| 4559 | act := "invites.resumed" |
| 4560 | if !*body.UserInvites { |
| 4561 | act = "invites.paused" |
| 4562 | } |
| 4563 | s.db.addAudit(s.adminActor(r), act, "", "", "", "") |
| 4564 | // Every connected client baked USER_INVITES into its page at load |
| 4565 | // (index.html's meta tag) — without this, the toggle's effect on |
| 4566 | // the invite UI only ever showed up after a reload (issue #346). |
| 4567 | out, _ := json.Marshal(map[string]any{"type": "user_invites_changed", "enabled": *body.UserInvites}) |
| 4568 | s.hub.broadcast <- outbound{data: out} // members:nil → everyone |
| 4569 | } |
| 4570 | } |
| 4571 | if body.AIEnabled != nil { |
| 4572 | // EXPLICIT consent is what signals, not the implicit default: |
| 4573 | // aiEnabled() reads true on a fresh space (absent key, the compat |
| 4574 | // default), so a plain was/now comparison would swallow the very |
| 4575 | // first "Bring Eleven in" — the feature's core case. Explicitly-on |
| 4576 | // before the write is the one state that stays silent. |
| 4577 | wasExplicitlyOn := s.db.aiEnabledExplicitly() |
| 4578 | if err := s.db.setAIEnabled(*body.AIEnabled); err != nil { |
| 4579 | httpError(w, http.StatusInternalServerError, "db error") |
| 4580 | return |
| 4581 | } |
| 4582 | // An explicit enable asks the provisioner to make sure this space's |
| 4583 | // sidecar exists (#858) — from ANY admin surface (setup flow, admin |
| 4584 | // console, Admin app), so the toggle and the provisioning can't |
| 4585 | // drift. Async and best-effort: idempotent end to end, no-op on |
| 4586 | // self-hosted instances (no meter env), and a lost signal is |
| 4587 | // re-sent by the next flip. |
| 4588 | if *body.AIEnabled && !wasExplicitlyOn { |
| 4589 | go s.signalAIOptIn() |
| 4590 | } |
| 4591 | } |
| 4592 | if body.BotsEnabled != nil { |
| 4593 | if err := s.db.setBotsEnabled(*body.BotsEnabled); err != nil { |
| 4594 | httpError(w, http.StatusInternalServerError, "db error") |
| 4595 | return |
| 4596 | } |
| 4597 | } |
| 4598 | if body.AppsEnabled != nil { |
| 4599 | if err := s.db.setAppsEnabled(*body.AppsEnabled); err != nil { |
| 4600 | httpError(w, http.StatusInternalServerError, "db error") |
| 4601 | return |
| 4602 | } |
| 4603 | } |
| 4604 | if body.MemberAppsEnabled != nil { |
| 4605 | if err := s.db.setMemberAppsEnabled(*body.MemberAppsEnabled); err != nil { |
| 4606 | httpError(w, http.StatusInternalServerError, "db error") |
| 4607 | return |
| 4608 | } |
| 4609 | } |
| 4610 | if body.SpaceInstallsAdmins != nil { |
| 4611 | if err := s.db.setSpaceInstallsAdmins(*body.SpaceInstallsAdmins); err != nil { |
| 4612 | httpError(w, http.StatusInternalServerError, "db error") |
| 4613 | return |
| 4614 | } |
| 4615 | } |
| 4616 | if body.SetupComplete != nil { |
| 4617 | if err := s.db.setSetupComplete(*body.SetupComplete); err != nil { |
| 4618 | httpError(w, http.StatusInternalServerError, "db error") |
| 4619 | return |
| 4620 | } |
| 4621 | } |
| 4622 | if body.AvatarAlt != nil { |
| 4623 | // The one branding field in this settings grab-bag — while sealed it |
| 4624 | // must 409 like every other plaintext branding setter (alt text rides |
| 4625 | // inside the sealed blob instead). |
| 4626 | if !s.requireUnsealed(w) { |
| 4627 | return |
| 4628 | } |
| 4629 | if err := s.db.setConfig("server_avatar_alt", trimAltText(*body.AvatarAlt)); err != nil { |
| 4630 | httpError(w, http.StatusInternalServerError, "db error") |
| 4631 | return |
| 4632 | } |
| 4633 | } |
| 4634 | if body.UpdateAuto != nil { |
| 4635 | if err := s.db.setUpdateAuto(*body.UpdateAuto); err != nil { |
| 4636 | httpError(w, http.StatusInternalServerError, "db error") |
| 4637 | return |
| 4638 | } |
| 4639 | } |
| 4640 | if body.UpdateDownload != nil { |
| 4641 | if err := s.db.setUpdateDownload(*body.UpdateDownload); err != nil { |
| 4642 | httpError(w, http.StatusInternalServerError, "db error") |
| 4643 | return |
| 4644 | } |
| 4645 | } |
| 4646 | if body.UpdateChannel != nil { |
| 4647 | if err := s.db.setUpdateChannel(*body.UpdateChannel); err != nil { |
| 4648 | httpError(w, http.StatusInternalServerError, "db error") |
| 4649 | return |
| 4650 | } |
| 4651 | } |
| 4652 | if body.UpdatePin != nil { |
| 4653 | if err := s.db.setUpdatePin(*body.UpdatePin); err != nil { |
| 4654 | httpError(w, http.StatusInternalServerError, "db error") |
| 4655 | return |
| 4656 | } |
| 4657 | } |
| 4658 | if body.UpdateMajor != nil { |
| 4659 | if err := s.db.setUpdateMajor(*body.UpdateMajor); err != nil { |
| 4660 | httpError(w, http.StatusInternalServerError, "db error") |
| 4661 | return |
| 4662 | } |
| 4663 | } |
| 4664 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "user_invites": s.db.usersCanInvite()}) |
| 4665 | } |
| 4666 | |
| 4667 | // ---- helpers ------------------------------------------------------------ |
| 4668 | |
| 4669 | // noCache makes browsers revalidate static assets, so deploys take effect without |
| 4670 | // a hard reload. |
| 4671 | func noCache(h http.Handler) http.Handler { |
| 4672 | return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) { |
| 4673 | w.Header().Set("Cache-Control", "no-cache") |
| 4674 | h.ServeHTTP(w, r) |
| 4675 | }) |
| 4676 | } |
| 4677 | |
| 4678 | func writeJSON(w http.ResponseWriter, status int, v any) { |
| 4679 | w.Header().Set("Content-Type", "application/json") |
| 4680 | w.WriteHeader(status) |
| 4681 | json.NewEncoder(w).Encode(v) |
| 4682 | } |
| 4683 | |
| 4684 | func httpError(w http.ResponseWriter, status int, msg string) { |
| 4685 | writeJSON(w, status, map[string]any{"error": msg}) |
| 4686 | } |
| 4687 | |
| 4688 | func boolStr(b bool) string { |
| 4689 | if b { |
| 4690 | return "1" |
| 4691 | } |
| 4692 | return "0" |
| 4693 | } |
| 4694 | |
| 4695 | func envOr(key, fallback string) string { |
| 4696 | if v := os.Getenv(key); v != "" { |
| 4697 | return v |
| 4698 | } |
| 4699 | return fallback |
| 4700 | } |
| 4701 | |
| 4702 | // envBytes reads a byte-count env var (a plain integer number of bytes), falling |
| 4703 | // back to def when unset, unparseable, or non-positive. |
| 4704 | func envBytes(key string, def int64) int64 { |
| 4705 | if v := strings.TrimSpace(os.Getenv(key)); v != "" { |
| 4706 | if n, err := strconv.ParseInt(v, 10, 64); err == nil && n > 0 { |
| 4707 | return n |
| 4708 | } |
| 4709 | } |
| 4710 | return def |
| 4711 | } |
| 4712 | |
| 4713 | func printAdminLink(addr, token string) { |
| 4714 | host := addr |
| 4715 | if strings.HasPrefix(host, ":") { |
| 4716 | host = "localhost" + host |
| 4717 | } |
| 4718 | log.Printf("\n\n Admin link (open once, keep it secret):\n http://%s/admin#token=%s\n\n", host, token) |
| 4719 | } |
| 4720 | |
| 4721 | // ---- APNs (native iOS app) ----------------------------------------------- |
| 4722 | |
| 4723 | // apnsSubscribe registers an iPhone's APNs device token against the caller's |
| 4724 | // session token, so the same suppression rules as Web Push apply. sandbox marks |
| 4725 | // tokens from development builds (delivered via Apple's sandbox gateway). |
| 4726 | func (s *Server) apnsSubscribe(w http.ResponseWriter, r *http.Request) { |
| 4727 | var body struct { |
| 4728 | Token string `json:"token"` |
| 4729 | APNsToken string `json:"apns_token"` |
| 4730 | Sandbox bool `json:"sandbox"` |
| 4731 | } |
| 4732 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 4733 | httpError(w, http.StatusBadRequest, "bad request") |
| 4734 | return |
| 4735 | } |
| 4736 | if !s.tokenOK(body.Token) { |
| 4737 | httpError(w, http.StatusForbidden, "not a member") |
| 4738 | return |
| 4739 | } |
| 4740 | if !apns.ValidDeviceToken(body.APNsToken) { |
| 4741 | httpError(w, http.StatusBadRequest, "bad request") |
| 4742 | return |
| 4743 | } |
| 4744 | if err := s.db.addAPNsToken(APNsToken{APNsToken: body.APNsToken, Token: body.Token, Sandbox: body.Sandbox}); err != nil { |
| 4745 | httpError(w, http.StatusInternalServerError, "db error") |
| 4746 | return |
| 4747 | } |
| 4748 | writeJSON(w, http.StatusOK, map[string]any{"ok": true, "enabled": s.apns != nil}) |
| 4749 | } |
| 4750 | |
| 4751 | func (s *Server) apnsUnsubscribe(w http.ResponseWriter, r *http.Request) { |
| 4752 | var body struct { |
| 4753 | Token string `json:"token"` |
| 4754 | APNsToken string `json:"apns_token"` |
| 4755 | } |
| 4756 | if json.NewDecoder(r.Body).Decode(&body) != nil { |
| 4757 | httpError(w, http.StatusBadRequest, "bad request") |
| 4758 | return |
| 4759 | } |
| 4760 | if !s.tokenOK(body.Token) { |
| 4761 | httpError(w, http.StatusForbidden, "not a member") |
| 4762 | return |
| 4763 | } |
| 4764 | _ = s.db.deleteAPNsToken(body.APNsToken) |
| 4765 | writeJSON(w, http.StatusOK, map[string]any{"ok": true}) |
| 4766 | } |
| 4767 | |
amadan