screentinker/server/lib
ScreenTinker cbf81a05a3 fix(#146): crash-hardening — one device's handler throw can't take down the fleet
Found in the alpha load test: client-chosen pairing codes collide by birthday
paradox, the provisioning INSERT hit UNIQUE(devices.pairing_code), the SqliteError
threw out of the (synchronous) socket handler -> uncaughtException -> logFatalAndExit
-> the WHOLE server exited and every device dropped. The colliding flood crash-LOOPED
the container (2 restarts).

Two layers, same "one device can't take down the fleet" theme as #142/#143/#144:

1. Narrow (deviceSocket.js): wrap the device:register provisioning INSERT in
   try/catch — a UNIQUE pairing_code collision (or ANY db error) rejects THAT
   registration (device:auth-error -> client retries) instead of throwing.
   currentDeviceId/authenticated now set only AFTER the row exists (no half-auth
   socket on failure).

2. Broader (lib/safe-socket.js): protectSocket() overrides socket.on per connection
   so any handler throw is caught, logged (event + id + stack), the socket told, and
   DISCONNECTED — per-CONNECTION fail-fast, not whole-PROCESS. We don't keep serving a
   connection from possibly-half-mutated state (honors the existing fail-fast intent),
   we just contain it to "one device reconnects" (a non-event after beta5). Wired into
   both the /device and /dashboard connection handlers; auto-covers future handlers.
   Audited first: no handler throws as control flow, so blanket-wrapping is safe.

Tests (mutation-verified, fail without their fix):
- register-insert-crash.test.js: a pairing_code collision AND a general bind error
  each reject-one-device with no uncaughtException; server keeps serving.
- socket-handler-isolation.test.js: a throwing handler disconnects only that socket;
  the server + other sockets stay alive.
Full suite 243/243.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
2026-06-29 23:38:11 -05:00
..
agency-layouts.js feat: agency zone-grant issuance UI + reactive placement card (#73) 2026-06-14 15:12:55 -05:00
agency-targets.js feat: full-screen-only guardrail for agency designations (#73) 2026-06-14 17:36:30 -05:00
branding.js fix(security): patch quick-win findings from the codebase review 2026-06-08 19:02:19 -05:00
command-queue.js feat(socket): delivery queue for offline-device emits 2026-05-14 13:06:43 -05:00
content-ack-limiter.js fix(#143): content-ack flood control — per-device rate budget + loop-lag valve 2026-06-27 22:21:57 -05:00
content-ingest.js refactor(content): extract the upload ingest into a shared lib (#73) 2026-06-13 22:48:42 -05:00
device-sanitize.js fix(security): patch quick-win findings from the codebase review 2026-06-08 19:02:19 -05:00
image-gen.js feat(ai): generate background + foreground images for signs (#41 Phase 2) 2026-06-09 13:40:14 -05:00
ota-breaker.js fix(#146): reconnect/heartbeat storm containment (beta5) 2026-06-29 22:12:13 -05:00
pair-lockout.js fix(api): harden device pairing against brute-force (#87) 2026-06-12 20:16:12 -05:00
permissions.js feat(roles): add cross-org platform_operator staff role (#13) 2026-06-05 10:30:21 -05:00
reconnect-throttle.js fix(#146): reconnect/heartbeat storm containment (beta5) 2026-06-29 22:12:13 -05:00
safe-socket.js fix(#146): crash-hardening — one device's handler throw can't take down the fleet 2026-06-29 23:38:11 -05:00
schedule-eval.js feat(scheduling): per-item schedule blocks (#74 dayparting, #75 auto-expire) 2026-06-11 15:46:41 -05:00
schema-check.js fix(db): observable migrations + fail-fast schema verification (#37) 2026-06-09 09:31:52 -05:00
secretbox.js feat(ai): AI content design in the Designer, BYO endpoint (#41 Phase 1) 2026-06-09 12:23:55 -05:00
socket-rooms.js feat(socket): Phase 2.3 workspace-scoped dashboard socket rooms + per-command permission gates. Dashboard namespace was previously a flat broadcast - every connected dashboard received every device's status/screenshot/playback events platform-wide (foreign device names + IPs included). Inbound socket commands gated by a legacy admin/superadmin role check that was dead code post-Phase-1 rename. 2026-05-12 11:34:24 -05:00
status-log-writer.js fix(#146): reconnect/heartbeat storm containment (beta5) 2026-06-29 22:12:13 -05:00
tenancy.js feat(roles): add cross-org platform_operator staff role (#13) 2026-06-05 10:30:21 -05:00
tenant-cascade-migration.js fix(db): cascade tenant resources on workspace/org delete (#18 follow-up) 2026-06-08 16:01:52 -05:00
totp-lockout.js feat(server): TOTP primitives - encrypted secret, hashed recovery codes, verify lockout (#100) 2026-06-13 20:48:55 -05:00
totp.js feat(server): TOTP primitives - encrypted secret, hashed recovery codes, verify lockout (#100) 2026-06-13 20:48:55 -05:00
user-deletion.js feat(admin): Delete Organization + Workspace with cascade (#36) 2026-06-09 09:22:21 -05:00
zone-validate.js fix: per-item mute round-trip + multi-zone orphan-zone fallback & warnings 2026-06-22 23:16:29 -05:00