siftlode/backend/app/worker.py
npeter83 317750e491 feat(downloads): M1 — schema, config, worker container, deps
- models: MediaAsset (shared file cache, unique on source+format_sig), DownloadJob
  (per-user request), DownloadProfile (presets), DownloadShare (ACL), DownloadQuota
- migrations 0036 (5 tables) + 0037 (6 builtin presets)
- sysconfig 'downloads' group (per-user defaults, retention/GC, layout, worker concurrency)
- config: DOWNLOAD_ROOT / WORKER_ENABLED env + download defaults
- deps: yt-dlp in requirements, ffmpeg in Dockerfile runtime stage
- worker: dedicated container (python -m app.worker), thin idle entry (loop lands in M2)
- localdev compose: worker service + downloads bind-mount; gitignore downloads/
2026-07-02 23:57:40 +02:00

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1.5 KiB
Python

"""Download worker process entry point.
Runs in a DEDICATED container (`command: python -m app.worker`, `WORKER_ENABLED=1`), separate
from the API so long yt-dlp downloads + ffmpeg postprocessing never block web requests. It
claims `queued` download jobs from the DB with FOR UPDATE SKIP LOCKED and runs them, writing
live progress back to the job row (the frontend polls it — the worker is a separate process and
can't reach the API's in-process WebSocket registry).
M1: thin, idle entry point (keeps the container healthy). The claim loop + yt-dlp integration
land in M2.
"""
import logging
import signal
import time
from app.config import settings
log = logging.getLogger("siftlode.worker")
_stop = False
def _handle_signal(signum, frame):
global _stop
_stop = True
def main() -> None:
logging.basicConfig(level=logging.INFO)
signal.signal(signal.SIGTERM, _handle_signal)
signal.signal(signal.SIGINT, _handle_signal)
if not settings.worker_enabled:
log.info("WORKER_ENABLED is off; worker exiting (nothing to do).")
return
log.info(
"Download worker started (concurrency=%d, root=%s). Claim loop lands in M2.",
settings.download_worker_concurrency,
settings.download_root,
)
while not _stop:
# M2: claim queued jobs (FOR UPDATE SKIP LOCKED) and download them.
time.sleep(settings.download_poll_seconds)
log.info("Download worker stopped.")
if __name__ == "__main__":
main()