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bambuddy/backend/app/api
maziggy 3e434458a4 fix(obico): capture snapshots locally and serve via nonce URL (#172)
Obico's ML API has a hardcoded 5s read timeout on the URL it fetches, which
  our /camera/snapshot regularly exceeds on cold calls (TLS proxy + ffmpeg +
  RTSP keyframe wait). The detection loop now captures the JPEG locally with
  a 20s timeout we control, stashes the bytes under a single-use 32-byte
  nonce, and hands Obico a new /api/v1/obico/cached-frame/{nonce} URL that
  returns the cached bytes instantly. The 5s ceiling is no longer a factor.

  The nonce is the credential (URL-safe, 256 bits of entropy, single-use,
  30s TTL) so the endpoint can be unauthenticated without widening the
  camera access surface. Replaces the previous camera-stream-token snapshot
  URL approach, which remained vulnerable to the upstream 5s timeout even
  when auth was disabled.

  Thanks to @fblix for the detailed reproducer with timeout numbers.
2026-04-16 11:09:54 +02:00
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