peter
0ed82fe6b6
Defense-in-depth after the ReDoS incident. The heavy work (yt-dlp download / ffmpeg edit) now runs in a child process (app.downloads.runner) supervised by the worker thread, not in the thread itself. A thread can't be killed and a C-level spin can't even be cooperatively cancelled, so one wedged download used to pin a core, hold the GIL and freeze the whole queue; a child process can be SIGTERM/SIGKILLed. The supervisor kills the child (and its process group, so ffmpeg grandchildren die too) when: a route pauses/cancels the job, it makes no progress for download_stall_timeout_seconds (150s), it runs past download_wall_clock_max_seconds (2h), the worker is shutting down, or the child crashes without setting state. On a kill it frees the asset and fails the job with a retryable network error (stalls are not auto-requeued). A clean exit is left alone — the child already wrote the terminal state, including a cooperative pause via the progress hook. - config.py: stall / wall-clock / supervisor-poll / kill-grace settings. - worker.py: _run_supervised + _spawn_download_child / _job_liveness / _stop_child / _cleanup_staging; _process_job claims the asset, then hands the heavy work to the child. - app/downloads/runner.py: the child entrypoint. - docker-compose.localdev.yml: init:true on the worker so tini (PID 1) reaps orphaned ffmpeg grandchildren left by a hard-kill (the worker reaps its own direct children). - tests: watchdog decision logic + SIGTERM->SIGKILL escalation (fake proc, no real subprocess).
1030 lines
44 KiB
Python
1030 lines
44 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.
|
|
|
|
Design:
|
|
* N loop threads (download_worker_concurrency) each claim a `queued` DownloadJob with
|
|
FOR UPDATE SKIP LOCKED and process it.
|
|
* The shared MediaAsset is the dedup unit. A job whose asset is already `ready` finishes
|
|
instantly (no re-download); a fresh asset is claimed pending→downloading by exactly one
|
|
worker (a DB compare-and-set), so two jobs for the same video+format never double-download.
|
|
* Live progress is written to the job row (short-lived sessions, throttled ~1/s) — the
|
|
frontend polls it; the worker can't reach the API's in-process WebSocket registry.
|
|
* Pause/cancel are cooperative: the progress hook re-reads the job status and aborts the
|
|
yt-dlp download if it's no longer `running`.
|
|
* Crash-safe: on startup, orphaned `running` jobs are requeued and `downloading` assets reset.
|
|
"""
|
|
import logging
|
|
import os
|
|
import re
|
|
import shutil
|
|
import signal
|
|
import subprocess
|
|
import sys
|
|
import threading
|
|
import time
|
|
from datetime import date, datetime, timedelta, timezone
|
|
from pathlib import Path
|
|
|
|
import yt_dlp
|
|
from sqlalchemy import text
|
|
|
|
from app import sysconfig
|
|
from app.config import settings
|
|
from app.db import SessionLocal
|
|
from app.downloads import edit as editmod
|
|
from app.downloads import errors as dlerrors
|
|
from app.downloads import formats, quota, service, storage
|
|
from app.models import DownloadJob, MediaAsset
|
|
from app.notifications import create_notification
|
|
from app.titles import normalize_title
|
|
|
|
log = logging.getLogger("siftlode.worker")
|
|
|
|
|
|
def _notify_download_done(
|
|
db, user_id: int | None, title: str | None, job_id, *, kind: str
|
|
) -> None:
|
|
"""Post a best-effort 'ready' notice to the owner's inbox — downloads/edits used to finish
|
|
silently while scheduler jobs and playlist-push already notified (R11 feedback symmetry). A
|
|
notification failure must never mask the completed job, so it is isolated + rolled back (mirrors
|
|
scheduler._notify_done). `kind` ("download"/"edit") lets the inbox pick accurate copy; the
|
|
English title here is only a fallback for an unknown type. `user_id`/`title` are captured by the
|
|
caller BEFORE its commit, so reading them here needs no post-commit refresh of an expired row."""
|
|
if user_id is None:
|
|
return
|
|
try:
|
|
create_notification(
|
|
db,
|
|
user_id=user_id,
|
|
type="download_done",
|
|
title=f"Ready to watch: {title}" if title else "Ready to watch",
|
|
data={"title": title, "kind": kind},
|
|
)
|
|
except Exception:
|
|
db.rollback()
|
|
log.exception("failed to write download-done notification for job %s", job_id)
|
|
|
|
_stop = threading.Event()
|
|
|
|
|
|
class _Aborted(Exception):
|
|
"""Raised inside the progress hook when the job was paused/canceled mid-download."""
|
|
|
|
|
|
def _handle_signal(signum, frame):
|
|
_stop.set()
|
|
|
|
|
|
# --- small DB helpers (short-lived sessions; the download itself holds no transaction) -------
|
|
|
|
def _set_job(job_id: int, **fields) -> None:
|
|
with SessionLocal() as db:
|
|
job = db.get(DownloadJob, job_id)
|
|
if job is None:
|
|
return
|
|
for k, v in fields.items():
|
|
setattr(job, k, v)
|
|
db.commit()
|
|
|
|
|
|
def _job_status(job_id: int) -> str | None:
|
|
with SessionLocal() as db:
|
|
return db.execute(
|
|
text("SELECT status FROM download_jobs WHERE id = :id"), {"id": job_id}
|
|
).scalar()
|
|
|
|
|
|
def _requeue_if_running(job_id: int, phase: str) -> None:
|
|
"""Put the job back to 'queued' for a later retry, but ONLY while it is still 'running'. The
|
|
route flips status to paused/cancelled to stop a job; a blind `status='queued'` here would
|
|
clobber that and silently revive a job the user just cancelled. The conditional WHERE makes the
|
|
requeue a no-op unless we still own a running job."""
|
|
with SessionLocal() as db:
|
|
db.execute(
|
|
text(
|
|
"UPDATE download_jobs SET status='queued', phase=:phase, updated_at=now() "
|
|
"WHERE id=:id AND status='running'"
|
|
),
|
|
{"id": job_id, "phase": phase},
|
|
)
|
|
db.commit()
|
|
|
|
|
|
def _parse_upload_date(raw) -> date | None:
|
|
if not raw:
|
|
return None
|
|
try:
|
|
return datetime.strptime(str(raw), "%Y%m%d").date()
|
|
except ValueError:
|
|
return None
|
|
|
|
|
|
# --- claim + recovery -----------------------------------------------------------------------
|
|
|
|
def _wait_for_schema(timeout: float = 300.0) -> bool:
|
|
"""Block until the download tables exist before doing any DB work. Returns False if they never
|
|
appeared (or we were asked to stop while waiting).
|
|
|
|
The API applies migrations on its OWN startup, and the worker is a separate container that may
|
|
boot first (they start in parallel). Without this, the worker would hit a missing `download_jobs`
|
|
table and crash-loop until the API's migrations land. Poll patiently instead — and if the schema
|
|
is still absent when the timeout runs out, say so and let the caller exit, because "continuing"
|
|
only moved the same crash one call further down (into `_recover_orphans`), where it read as an
|
|
unrelated failure."""
|
|
deadline = time.monotonic() + timeout
|
|
while not _stop.is_set():
|
|
try:
|
|
with SessionLocal() as db:
|
|
db.execute(text("SELECT 1 FROM download_jobs LIMIT 1"))
|
|
return True
|
|
except Exception as exc: # noqa: BLE001 — table not migrated yet / DB not up yet
|
|
if time.monotonic() > deadline:
|
|
log.error(
|
|
"download schema still absent after %ss — the API's migrations have not landed; "
|
|
"exiting so the container restarts: %s",
|
|
timeout, str(exc)[:120],
|
|
)
|
|
return False
|
|
log.info("waiting for the database schema (API migrations)…")
|
|
_stop.wait(3.0)
|
|
return False
|
|
|
|
|
|
def _recover_orphans() -> None:
|
|
"""Reset state left behind by a previous crash so nothing is stuck."""
|
|
with SessionLocal() as db:
|
|
db.execute(text("UPDATE download_jobs SET status='queued' WHERE status='running'"))
|
|
db.execute(text("UPDATE media_assets SET status='pending' WHERE status='downloading'"))
|
|
db.commit()
|
|
|
|
|
|
def _claim_job() -> int | None:
|
|
"""Claim the oldest queued job whose user is under their per-user concurrency limit.
|
|
|
|
Fetches a window of locked candidates (FOR UPDATE SKIP LOCKED) and picks the first eligible
|
|
one, so one user flooding the queue can't starve others beyond their max_concurrent."""
|
|
with SessionLocal() as db:
|
|
rows = db.execute(
|
|
text(
|
|
"""
|
|
SELECT id, user_id FROM download_jobs
|
|
WHERE status='queued'
|
|
ORDER BY queue_pos, id
|
|
FOR UPDATE SKIP LOCKED
|
|
LIMIT 50
|
|
"""
|
|
)
|
|
).fetchall()
|
|
chosen = next(
|
|
(jid for jid, uid in rows if not quota.at_concurrency_limit(db, uid)), None
|
|
)
|
|
if chosen is None:
|
|
db.commit() # release the row locks; nothing eligible right now
|
|
return None
|
|
db.execute(
|
|
text(
|
|
"UPDATE download_jobs SET status='running', phase='starting', updated_at=now() "
|
|
"WHERE id = :id"
|
|
),
|
|
{"id": chosen},
|
|
)
|
|
db.commit()
|
|
return chosen
|
|
|
|
|
|
def _claim_asset(asset_id: int) -> bool:
|
|
"""Compare-and-set pending→downloading. True if THIS worker won the right to download."""
|
|
with SessionLocal() as db:
|
|
row = db.execute(
|
|
text(
|
|
"UPDATE media_assets SET status='downloading' "
|
|
"WHERE id = :id AND status='pending' RETURNING id"
|
|
),
|
|
{"id": asset_id},
|
|
).fetchone()
|
|
db.commit()
|
|
return row is not None
|
|
|
|
|
|
# --- supervised child execution + watchdog --------------------------------------------------
|
|
# The heavy work runs in a child process so a wedged yt-dlp/ffmpeg is HARD-killable. A worker thread
|
|
# can't be killed, a C-level spin (e.g. a catastrophic regex) can't even be cooperatively cancelled,
|
|
# and one such thread starves the rest via the GIL — the incident that motivated this. The parent
|
|
# thread supervises: it kills the child (and its process group, so ffmpeg grandchildren die too) on
|
|
# a route pause/cancel, on a no-progress stall, or past an absolute wall-clock cap.
|
|
|
|
_CHILD_OK = 0
|
|
|
|
|
|
def _spawn_download_child(job_id: int) -> subprocess.Popen:
|
|
"""Start the child that does the actual download/edit for `job_id`, in its OWN session/process
|
|
group so stopping it also stops any ffmpeg / helper processes yt-dlp spawned."""
|
|
return subprocess.Popen(
|
|
[sys.executable, "-m", "app.downloads.runner", str(job_id)],
|
|
start_new_session=True,
|
|
)
|
|
|
|
|
|
def _job_liveness(job_id: int) -> tuple[str | None, float | None]:
|
|
"""(status, seconds-since-last-row-update) for the job, computed with the DB clock so there is
|
|
no parent↔DB skew. A live download rewrites its row ~1/s; a stalled one never does. Returns
|
|
(None, None) if the row is gone."""
|
|
with SessionLocal() as db:
|
|
row = db.execute(
|
|
text(
|
|
"SELECT status, EXTRACT(EPOCH FROM (now() - updated_at)) "
|
|
"FROM download_jobs WHERE id = :id"
|
|
),
|
|
{"id": job_id},
|
|
).one_or_none()
|
|
if row is None:
|
|
return None, None
|
|
return row[0], (float(row[1]) if row[1] is not None else None)
|
|
|
|
|
|
def _signal_group(proc: subprocess.Popen, pgid: int | None, sig: int) -> None:
|
|
"""Signal the child's whole process group (falling back to the child alone), swallowing the race
|
|
where it has already exited."""
|
|
try:
|
|
if pgid is not None:
|
|
os.killpg(pgid, sig)
|
|
else:
|
|
proc.send_signal(sig)
|
|
except (ProcessLookupError, OSError):
|
|
pass
|
|
|
|
|
|
def _stop_child(proc: subprocess.Popen, grace_s: float) -> None:
|
|
"""SIGTERM the child's process group, then SIGKILL if it outlives the grace period — the same
|
|
terminate→wait→kill escalation as run_ffmpeg, so a child that ignores SIGTERM is still reaped."""
|
|
if proc.poll() is not None:
|
|
return
|
|
try:
|
|
pgid: int | None = os.getpgid(proc.pid)
|
|
except OSError:
|
|
pgid = None
|
|
_signal_group(proc, pgid, signal.SIGTERM)
|
|
try:
|
|
proc.wait(timeout=grace_s)
|
|
return
|
|
except subprocess.TimeoutExpired:
|
|
pass
|
|
_signal_group(proc, pgid, signal.SIGKILL)
|
|
try:
|
|
proc.wait(timeout=grace_s)
|
|
except subprocess.TimeoutExpired:
|
|
log.error("download child pid %s survived SIGKILL", proc.pid)
|
|
|
|
|
|
def _run_supervised(job_id: int, asset_id: int) -> None:
|
|
"""Run the heavy download/edit for an already-claimed asset in a child process and watchdog it.
|
|
|
|
A clean child exit means the child already wrote the terminal job/asset state (done/error, or a
|
|
cooperative pause via the in-child progress hook) — we leave it. We step in only when the child
|
|
can't finish or self-abort: a route paused/cancelled it (kill, free the asset, keep the route's
|
|
status), it made no progress for `stall_timeout` or ran past `wall_clock_max` (kill, fail the
|
|
job), the worker is shutting down (kill, requeue), or it crashed without setting state."""
|
|
poll_s = max(1, settings.download_supervisor_poll_seconds)
|
|
stall_s = settings.download_stall_timeout_seconds
|
|
wall_s = settings.download_wall_clock_max_seconds
|
|
grace_s = settings.download_kill_grace_seconds
|
|
|
|
try:
|
|
proc = _spawn_download_child(job_id)
|
|
except Exception: # noqa: BLE001 — spawn failed; don't leave the asset stuck 'downloading'
|
|
log.exception("failed to spawn download child for job %s", job_id)
|
|
_reset_asset_pending(asset_id)
|
|
_requeue_if_running(job_id, None)
|
|
return
|
|
|
|
started = time.monotonic()
|
|
reason: str | None = None
|
|
while True:
|
|
try:
|
|
proc.wait(timeout=poll_s)
|
|
break # child finished on its own
|
|
except subprocess.TimeoutExpired:
|
|
pass
|
|
status, stale = _job_liveness(job_id)
|
|
if status is None or status != "running":
|
|
reason = "cancelled" # a route paused/cancelled it (or the row vanished)
|
|
break
|
|
if stale is not None and stale > stall_s:
|
|
reason = "stalled"
|
|
break
|
|
if time.monotonic() - started > wall_s:
|
|
reason = "timeout"
|
|
break
|
|
if _stop.is_set():
|
|
reason = "shutdown"
|
|
break
|
|
|
|
if reason is None:
|
|
# Child exited. If it died WITHOUT setting a terminal state (non-zero exit / crash / OOM),
|
|
# the job is still 'running' — fail it here so nothing is left stuck.
|
|
if proc.returncode != _CHILD_OK:
|
|
status, _ = _job_liveness(job_id)
|
|
if status == "running":
|
|
_reset_asset_pending(asset_id)
|
|
_cleanup_staging(asset_id)
|
|
_set_job(
|
|
job_id, status="error", error_code="unknown", phase=None,
|
|
error=f"The download process exited unexpectedly (code {proc.returncode}).",
|
|
)
|
|
log.warning("job %s: child exited %s without finishing", job_id, proc.returncode)
|
|
return
|
|
|
|
_stop_child(proc, grace_s)
|
|
_reset_asset_pending(asset_id)
|
|
_cleanup_staging(asset_id)
|
|
if reason == "cancelled":
|
|
# The route already set paused/cancelled (or the job is gone); just free the asset.
|
|
log.info("job %s: child stopped (route pause/cancel)", job_id)
|
|
return
|
|
if reason == "shutdown":
|
|
_requeue_if_running(job_id, None) # resume on the next boot
|
|
return
|
|
msg = (
|
|
f"The download stalled (no progress for {int(stall_s)}s) and was stopped."
|
|
if reason == "stalled"
|
|
else f"The download exceeded the {int(wall_s)}s time limit and was stopped."
|
|
)
|
|
_set_job(job_id, status="error", error=msg, error_code="network", phase=None)
|
|
log.warning("job %s: stopped by watchdog (%s)", job_id, reason)
|
|
|
|
|
|
def _cleanup_staging(asset_id: int) -> None:
|
|
"""Best-effort removal of a killed child's leftover staging dirs (its own `finally` never ran).
|
|
The next attempt on this asset also wipes staging on start, so this is just tidiness/disk."""
|
|
for path in (_staging_dir(asset_id), _edit_staging_dir(asset_id)):
|
|
shutil.rmtree(path, ignore_errors=True)
|
|
|
|
|
|
# --- processing -----------------------------------------------------------------------------
|
|
|
|
def _process_job(job_id: int) -> None:
|
|
"""Dispatch a claimed job. The trivial outcomes (cache hit, dead/contended asset) are handled
|
|
inline and cheaply; the actual heavy work (yt-dlp download / ffmpeg edit) is claimed here and
|
|
then run in a supervised CHILD PROCESS (`_run_supervised`) so a wedged yt-dlp/ffmpeg can be
|
|
hard-killed — a worker THREAD cannot be killed, nor (when it spins in a C call) even
|
|
cooperatively cancelled, and one such thread starves the others via the GIL."""
|
|
with SessionLocal() as db:
|
|
job = db.get(DownloadJob, job_id)
|
|
if job is None:
|
|
return
|
|
asset = db.get(MediaAsset, job.asset_id) if job.asset_id else None
|
|
asset_id = asset.id if asset else None
|
|
asset_status = asset.status if asset else None
|
|
asset_error = asset.error if asset else None
|
|
|
|
if asset is None:
|
|
_set_job(job_id, status="error", error="No media asset", phase=None)
|
|
return
|
|
|
|
if asset_status == "ready":
|
|
_finish_from_cache(job_id, asset_id)
|
|
return
|
|
if asset_status == "error":
|
|
_set_job(job_id, status="error", error=asset_error or "Download failed", phase=None)
|
|
return
|
|
if asset_status == "downloading":
|
|
# Another worker owns this asset; wait and let the job be reclaimed later.
|
|
_requeue_if_running(job_id, "waiting")
|
|
time.sleep(2)
|
|
return
|
|
|
|
# asset_status == "pending": try to win the download / edit.
|
|
if not _claim_asset(asset_id):
|
|
_requeue_if_running(job_id, "waiting")
|
|
time.sleep(2)
|
|
return
|
|
|
|
# The asset is now ours ('downloading'): run the heavy work in a supervised child process.
|
|
_run_supervised(job_id, asset_id)
|
|
|
|
|
|
def _finish_from_cache(job_id: int, asset_id: int) -> None:
|
|
with SessionLocal() as db:
|
|
job = db.get(DownloadJob, job_id)
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if job and asset:
|
|
job.status = "done"
|
|
job.progress = 100
|
|
job.phase = None
|
|
if not job.display_name:
|
|
# display_name is VARCHAR(255); a title can be longer (e.g. a recipe in the title).
|
|
job.display_name = asset.title[:255] if asset.title else None
|
|
asset.last_access_at = datetime.now(timezone.utc)
|
|
db.commit()
|
|
|
|
|
|
def build_uploader_url(info: dict) -> str | None:
|
|
"""The channel/uploader page URL for the auto-clickable channel line. YouTube gives a
|
|
`channel_url`/`uploader_url` directly; Facebook gives neither but exposes a numeric
|
|
`uploader_id` (the page id) that resolves at facebook.com/<id>. Returns None for sources with
|
|
no derivable channel page (e.g. reddit / a raw media URL)."""
|
|
url = info.get("channel_url") or info.get("uploader_url")
|
|
if url:
|
|
return url
|
|
uid = info.get("uploader_id")
|
|
tag = f"{info.get('extractor_key') or info.get('extractor') or ''} {info.get('webpage_url') or ''}".lower()
|
|
if uid and "facebook" in tag:
|
|
return f"https://www.facebook.com/{uid}"
|
|
return None
|
|
|
|
|
|
def _fill_asset_meta_early(asset_id: int, info: dict) -> None:
|
|
"""Populate an asset's display metadata from yt-dlp's info_dict the first time it's seen
|
|
(only if not already filled at enqueue from our catalog) — so an ad-hoc URL's row shows a
|
|
real title + thumbnail while it downloads, not just the URL. Zero extra network cost."""
|
|
with SessionLocal() as db:
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if asset is None or asset.title:
|
|
return
|
|
# `or info.get("id")` avoids a blank card while downloading when the cleaned title is empty
|
|
# (e.g. a title that was only a social engagement prefix); the completion path later sets
|
|
# the final title with its own source_ref fallback.
|
|
asset.title = normalize_title(info.get("title")) or info.get("id")
|
|
asset.uploader = info.get("uploader") or info.get("channel")
|
|
asset.uploader_url = build_uploader_url(info)
|
|
asset.thumbnail_url = info.get("thumbnail")
|
|
asset.duration_s = int(info["duration"]) if info.get("duration") else None
|
|
asset.upload_date = _parse_upload_date(info.get("upload_date"))
|
|
asset.source_webpage_url = info.get("webpage_url")
|
|
db.commit()
|
|
|
|
|
|
def _make_progress_hook(job_id: int, asset_id: int):
|
|
state = {"meta_done": False}
|
|
cancelled = _cancel_poll(job_id) # same policy as the ffmpeg path
|
|
allow_write = _rate_limiter(_DB_WRITE_INTERVAL_S)
|
|
|
|
def hook(d: dict) -> None:
|
|
# Cooperative pause/cancel: if the job is no longer 'running', abort the download.
|
|
if cancelled():
|
|
raise _Aborted
|
|
if not state["meta_done"] and d.get("info_dict"):
|
|
state["meta_done"] = True
|
|
try:
|
|
_fill_asset_meta_early(asset_id, d["info_dict"])
|
|
except Exception: # noqa: BLE001 — metadata is best-effort, never fail a download
|
|
pass
|
|
if d.get("status") != "downloading":
|
|
return
|
|
if not allow_write():
|
|
return
|
|
# yt-dlp downloads the video and audio streams SEPARATELY (each 0→100%), then merges.
|
|
# Label the phase so the user understands the bar resetting between streams instead of
|
|
# seeing a mysterious 95%→5% jump.
|
|
info = d.get("info_dict") or {}
|
|
vcodec = info.get("vcodec") or "none"
|
|
acodec = info.get("acodec") or "none"
|
|
if vcodec != "none" and acodec == "none":
|
|
phase = "video"
|
|
elif acodec != "none" and vcodec == "none":
|
|
phase = "audio"
|
|
else:
|
|
phase = "media"
|
|
total = d.get("total_bytes") or d.get("total_bytes_estimate") or 0
|
|
done = d.get("downloaded_bytes") or 0
|
|
pct = int(done * 100 / total) if total else 0
|
|
_set_job(
|
|
job_id,
|
|
progress=min(pct, 99),
|
|
speed_bps=int(d["speed"]) if d.get("speed") else None,
|
|
eta_s=int(d["eta"]) if d.get("eta") else None,
|
|
phase=phase,
|
|
)
|
|
|
|
return hook
|
|
|
|
|
|
# Both progress sources call back FAR faster than the database should be touched: yt-dlp fires its
|
|
# hook per chunk, and ffmpeg's `-progress pipe:1` emits a block of ~12 lines every ~0.5s while
|
|
# run_ffmpeg calls its callbacks once per LINE. Every callback here is a round-trip (`_job_status`
|
|
# opens a session and SELECTs; `_set_job` opens one and UPDATE+COMMITs), so unthrottled they cost
|
|
# ~10^5 queries on a long job. ONE interval, ONE implementation, used by both paths — three
|
|
# hand-rolled copies is how the ffmpeg side ended up unthrottled while the download side was fine.
|
|
_DB_WRITE_INTERVAL_S = 1.0
|
|
_CANCEL_POLL_INTERVAL_S = 1.0
|
|
|
|
|
|
def _rate_limiter(interval_s: float, *, now=time.monotonic):
|
|
"""`should_run()` → True at most once per `interval_s` (the first call always passes).
|
|
`now` is injectable so tests drive a clock instead of patching the global one."""
|
|
# `None`, not 0.0: "never ran" has to be a VALUE, not a falsy timestamp. A truthiness test here
|
|
# reads a legitimate `now() == 0.0` as "never ran" and lets a second call straight through —
|
|
# unreachable with real `time.monotonic()`, but `now` exists to be injected, and a test clock
|
|
# starting at 0 is the obvious choice. That would let a throttle test encode the wrong
|
|
# behaviour and still pass.
|
|
state: dict[str, float | None] = {"at": None}
|
|
|
|
def should_run() -> bool:
|
|
t = now()
|
|
last = state["at"]
|
|
if last is not None and t - last < interval_s:
|
|
return False
|
|
state["at"] = t
|
|
return True
|
|
|
|
return should_run
|
|
|
|
|
|
def _cancel_poll(job_id: int, interval_s: float = _CANCEL_POLL_INTERVAL_S, *, now=time.monotonic):
|
|
"""Cooperative "has this job been paused/cancelled?" poll, rate-limited and sticky: once it
|
|
says yes it never queries again. Shared by the yt-dlp hook and run_ffmpeg so cancel latency is
|
|
one policy, not one per call site."""
|
|
allow = _rate_limiter(interval_s, now=now)
|
|
state = {"cancelled": False}
|
|
|
|
def cancelled() -> bool:
|
|
if not state["cancelled"] and allow():
|
|
state["cancelled"] = _job_status(job_id) not in ("running", None)
|
|
return state["cancelled"]
|
|
|
|
return cancelled
|
|
|
|
|
|
def _ffmpeg_progress_writer(job_id: int, phase: str, *, now=time.monotonic):
|
|
"""`on_progress` for run_ffmpeg: persist at most one row write per interval, and only when the
|
|
whole-percent value actually changed (the bar shows integers)."""
|
|
allow = _rate_limiter(_DB_WRITE_INTERVAL_S, now=now)
|
|
state = {"pct": -1}
|
|
|
|
def write(pct: float) -> None:
|
|
whole = int(pct)
|
|
if whole == state["pct"] or not allow():
|
|
return
|
|
state["pct"] = whole
|
|
_set_job(job_id, progress=whole, phase=phase)
|
|
|
|
return write
|
|
|
|
|
|
def _pp_phase(pp: str) -> str:
|
|
"""Map a yt-dlp postprocessor class name to a user-facing phase label. ffmpeg post-steps
|
|
aren't byte-progress operations (no %), so the UI shows the step name + an indeterminate
|
|
pulse — this makes the long merge/finalize legible instead of a silent 'Processing'."""
|
|
if "Merg" in pp:
|
|
return "merging"
|
|
if "ExtractAudio" in pp:
|
|
return "audio_extract"
|
|
if "Thumbnail" in pp:
|
|
return "thumbnail"
|
|
if "SponsorBlock" in pp or "ModifyChapters" in pp:
|
|
return "sponsorblock"
|
|
if "Metadata" in pp:
|
|
return "metadata"
|
|
return "processing"
|
|
|
|
|
|
def _make_pp_hook(job_id: int):
|
|
"""Postprocessor hook: surface the current ffmpeg step so the bar shows a concrete label
|
|
(Merging / Embedding thumbnail / …) instead of freezing at 100% after the streams finish."""
|
|
|
|
def hook(d: dict) -> None:
|
|
if d.get("status") in ("started", "processing"):
|
|
_set_job(job_id, phase=_pp_phase(d.get("postprocessor") or ""), speed_bps=None, eta_s=None)
|
|
|
|
return hook
|
|
|
|
|
|
def _staging_dir(asset_id: int) -> Path:
|
|
return Path(settings.download_root) / ".staging" / f"asset-{asset_id}"
|
|
|
|
|
|
_THUMB_SUFFIXES = (".jpg", ".jpeg", ".png", ".webp")
|
|
# yt-dlp's working files in the staging dir. None of them is ever the finished media, but several
|
|
# CAN be the biggest file there (a video-only per-format stream, an abandoned fragment run), so the
|
|
# staging fallback must exclude them by name — picking one would store e.g. a silent video-only
|
|
# stream as a ready asset.
|
|
_YTDLP_TEMP_RE = re.compile(
|
|
r"\.part(-Frag\d+)?$" # in-flight download / fragment
|
|
r"|\.ytdl$" # resume state
|
|
r"|\.temp\.[^.]+$" # merge/postprocess temp
|
|
r"|\.f\d+\.[^.]+$", # per-format stream kept before the merge
|
|
re.IGNORECASE,
|
|
)
|
|
|
|
|
|
def _find_thumbnail(staging: Path, media: Path) -> Path | None:
|
|
for p in staging.iterdir():
|
|
if p != media and p.suffix.lower() in _THUMB_SUFFIXES:
|
|
return p
|
|
return None
|
|
|
|
|
|
def _produced_file(info: dict, staging: Path) -> Path:
|
|
"""The media file yt-dlp actually wrote.
|
|
|
|
`requested_downloads[0].filepath` is the authoritative answer on YouTube, but an arbitrary-URL
|
|
extractor may not fill it in at all — and `Path("")` is `Path(".")`, which *passes* `.exists()`,
|
|
so a missing value used to sail past the fallback and blow up two steps later (`with_name` on an
|
|
empty name: the BBC-news failure). Anything that isn't a real file counts as absent; then fall
|
|
back to the largest file left in staging that is neither a thumbnail nor one of yt-dlp's own
|
|
working files (see `_YTDLP_TEMP_RE`)."""
|
|
req = (info.get("requested_downloads") or [{}])[0]
|
|
fp = req.get("filepath") or req.get("_filename") or info.get("filepath") or info.get("_filename")
|
|
if fp:
|
|
produced = Path(str(fp))
|
|
if produced.is_file():
|
|
return produced
|
|
cands = [
|
|
p
|
|
for p in staging.iterdir()
|
|
if p.is_file()
|
|
and p.suffix.lower() not in _THUMB_SUFFIXES
|
|
and not _YTDLP_TEMP_RE.search(p.name)
|
|
]
|
|
if not cands:
|
|
raise RuntimeError("yt-dlp produced no output file")
|
|
return max(cands, key=lambda p: p.stat().st_size)
|
|
|
|
|
|
def _media_info(info: dict) -> dict:
|
|
"""Unwrap a playlist/multi_video extraction to the entry that carries the download.
|
|
|
|
A single non-YouTube page (a news article's video, a multi-rendition embed) can extract as a
|
|
wrapper whose own dict has no `requested_downloads` — the media lives on an entry. Pick the
|
|
FIRST entry that actually downloaded something: on a page with a skipped teaser in front of the
|
|
real video, entries[0] carries no file, and taking it blindly would label the produced file
|
|
with the wrong id/title/duration."""
|
|
entries = [e for e in (info.get("entries") or []) if e]
|
|
if not entries or info.get("requested_downloads"):
|
|
return info
|
|
chosen = next((e for e in entries if e.get("requested_downloads")), entries[0])
|
|
return {**info, **chosen}
|
|
|
|
|
|
# Errors worth retrying with a different player-client set (YouTube per-client flakiness).
|
|
_RETRIABLE_MARKERS = (
|
|
"not a bot",
|
|
"DRM protected",
|
|
"Requested format is not available",
|
|
"Only images are available",
|
|
"Sign in to confirm",
|
|
)
|
|
|
|
|
|
def _extract_with_fallback(job_id: int, asset_id: int, url: str, spec: dict, staging: Path):
|
|
"""Download via yt-dlp, trying the primary player clients then the POT-backed fallback set
|
|
on a bot/DRM/format failure. Returns the info dict of the successful attempt."""
|
|
client_sets = [
|
|
c for c in (settings.player_client_list, settings.player_client_fallback_list) if c
|
|
] or [None]
|
|
outtmpl = str(staging / "%(id)s.%(ext)s")
|
|
last_exc: Exception | None = None
|
|
for i, clients in enumerate(client_sets):
|
|
opts = formats.build_ydl_opts(
|
|
spec, outtmpl, _make_progress_hook(job_id, asset_id),
|
|
settings.download_pot_base_url, clients,
|
|
)
|
|
opts["postprocessor_hooks"] = [_make_pp_hook(job_id)]
|
|
try:
|
|
with yt_dlp.YoutubeDL(opts) as ydl:
|
|
return ydl.extract_info(url, download=True)
|
|
except yt_dlp.utils.DownloadError as exc:
|
|
last_exc = exc
|
|
retriable = any(m in str(exc) for m in _RETRIABLE_MARKERS)
|
|
if i < len(client_sets) - 1 and retriable:
|
|
log.info("job %s: clients %s failed (%s); retrying with fallback", job_id, clients, str(exc)[:70])
|
|
for p in list(staging.iterdir()): # drop partials before the retry
|
|
try:
|
|
p.unlink()
|
|
except OSError:
|
|
pass
|
|
_set_job(job_id, progress=0, phase="downloading")
|
|
continue
|
|
raise
|
|
raise last_exc # unreachable (loop either returns or raises)
|
|
|
|
|
|
def _download_settings() -> tuple[str, int]:
|
|
"""Layout + retention days from the DB config (admin-overridable on the Configuration page),
|
|
falling back to the env defaults. Read here, not from `settings`, so an admin edit takes effect."""
|
|
with SessionLocal() as db:
|
|
return (
|
|
sysconfig.get_str(db, "download_layout"),
|
|
sysconfig.get_int(db, "download_retention_days"),
|
|
)
|
|
|
|
|
|
def _ensure_browser_playable(job_id: int, produced: Path, spec: dict, info: dict) -> Path:
|
|
"""Make an mp4-compat-profile download play in every browser: H.264 + AAC/MP3 in mp4. If the
|
|
download (whatever the source shipped) isn't already that, re-encode the offending stream(s) —
|
|
or just remux when the codecs are fine but the container isn't. **Scope:** only the mp4 compat
|
|
profile is normalized; an explicit `vcodec` or a non-mp4 custom profile is the user opting out
|
|
of the guarantee and is left as-is (so a `webm` profile can still ship VP9/Opus). Returns the
|
|
file to store (converted, or the original) and corrects `info`'s codec fields to match disk."""
|
|
if spec.get("container") != "mp4" or spec.get("vcodec"):
|
|
return produced
|
|
vcodec, acodec = editmod.probe_codecs(produced)
|
|
is_mp4 = produced.suffix.lower() == ".mp4"
|
|
needs, reenc_v, reenc_a = editmod.browser_transcode_flags(vcodec, acodec, is_mp4)
|
|
if not needs:
|
|
return produced
|
|
|
|
dest = produced.with_name(produced.stem + ".browser.mp4")
|
|
action = "re-encode" if (reenc_v or reenc_a) else "remux"
|
|
log.info("job %s: %s (v=%s a=%s mp4=%s) -> browser-safe mp4", job_id, action, vcodec, acodec, is_mp4)
|
|
_set_job(job_id, phase="processing", progress=0, speed_bps=None, eta_s=None)
|
|
# Prefer the info duration; probe the file when the extractor didn't provide one, so a long
|
|
# re-encode still shows real progress instead of a frozen 0%.
|
|
total_s = int(info["duration"]) if info.get("duration") else editmod.probe_duration(produced)
|
|
editmod.run_ffmpeg(
|
|
editmod.build_browser_safe_cmd(produced, dest, reenc_v, reenc_a),
|
|
total_s=total_s,
|
|
on_progress=_ffmpeg_progress_writer(job_id, "processing"),
|
|
should_cancel=_cancel_poll(job_id),
|
|
)
|
|
produced.unlink(missing_ok=True)
|
|
# Keep the stored asset metadata truthful about what's now on disk.
|
|
if reenc_v:
|
|
info["vcodec"] = "h264"
|
|
if reenc_a:
|
|
info["acodec"] = "aac"
|
|
return dest
|
|
|
|
|
|
def _download(job_id: int, asset_id: int, source_kind: str, source_ref: str, spec: dict) -> None:
|
|
staging = _staging_dir(asset_id)
|
|
try:
|
|
if staging.exists():
|
|
shutil.rmtree(staging, ignore_errors=True)
|
|
staging.mkdir(parents=True, exist_ok=True)
|
|
|
|
_set_job(job_id, phase="downloading", progress=0)
|
|
url = service.source_url(source_kind, source_ref)
|
|
info = _media_info(_extract_with_fallback(job_id, asset_id, url, spec, staging))
|
|
|
|
produced = _produced_file(info, staging)
|
|
produced = _ensure_browser_playable(job_id, produced, spec, info)
|
|
ext = produced.suffix.lstrip(".").lower()
|
|
meta = storage.MediaMeta(
|
|
video_id=info.get("id") or source_ref,
|
|
title=normalize_title(info.get("title")) or source_ref,
|
|
uploader=info.get("uploader") or info.get("channel") or "Unknown Channel",
|
|
upload_date=_parse_upload_date(info.get("upload_date")),
|
|
duration_s=int(info["duration"]) if info.get("duration") else None,
|
|
description=info.get("description"),
|
|
thumbnail_url=info.get("thumbnail"),
|
|
)
|
|
|
|
layout, retention_days = _download_settings()
|
|
rel = storage.rel_path(meta, ext, layout, asset_id=asset_id)
|
|
thumb = _find_thumbnail(staging, produced)
|
|
# Convert the raw thumbnail (webp/png/jpeg) to a real JPEG ourselves — robustly — for the
|
|
# poster + og:image sidecar, now that yt-dlp's fatal thumbnail convertor is gone. On failure
|
|
# this is None and write_sidecars writes no poster, so ensure_poster cuts a frame instead.
|
|
poster_jpg = editmod.thumbnail_to_jpg(thumb, staging / "poster.jpg")
|
|
storage.place_file(produced, settings.download_root, rel)
|
|
nfo_ok = storage.write_sidecars(settings.download_root, rel, meta, poster_jpg)
|
|
|
|
final = storage.abs_path(settings.download_root, rel)
|
|
size = final.stat().st_size if final.exists() else None
|
|
expires = datetime.now(timezone.utc) + timedelta(days=retention_days)
|
|
|
|
with SessionLocal() as db:
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if asset:
|
|
asset.status = "ready"
|
|
asset.rel_path = rel
|
|
asset.size_bytes = size
|
|
asset.duration_s = meta.duration_s
|
|
asset.width = int(info["width"]) if info.get("width") else None
|
|
asset.height = int(info["height"]) if info.get("height") else None
|
|
asset.container = ext
|
|
asset.vcodec = info.get("vcodec") if info.get("vcodec") not in (None, "none") else None
|
|
asset.acodec = info.get("acodec") if info.get("acodec") not in (None, "none") else None
|
|
asset.title = meta.title
|
|
asset.uploader = meta.uploader
|
|
asset.uploader_url = build_uploader_url(info)
|
|
asset.upload_date = meta.upload_date
|
|
asset.thumbnail_url = meta.thumbnail_url
|
|
# Record a self-hosted poster for every download: it's the reliable link-preview
|
|
# (og:image) source — a remote thumbnail, esp. Facebook's signed CDN URL, expires
|
|
# and can't be relied on cross-origin. write_sidecars already wrote <base>.jpg from
|
|
# the thumbnail; ensure_poster returns that, or cuts a frame if there was none.
|
|
asset.poster_path = editmod.ensure_poster(asset, settings.download_root)
|
|
asset.source_webpage_url = info.get("webpage_url")
|
|
asset.nfo_written = nfo_ok
|
|
asset.error = None
|
|
asset.last_access_at = datetime.now(timezone.utc)
|
|
asset.expires_at = expires
|
|
job = db.get(DownloadJob, job_id)
|
|
if job:
|
|
job.status = "done"
|
|
job.progress = 100
|
|
job.phase = None
|
|
job.speed_bps = None
|
|
job.eta_s = None
|
|
if not job.display_name:
|
|
# display_name is VARCHAR(255) — clip a long title (see _fill_asset_meta_early).
|
|
job.display_name = meta.title[:255] if meta.title else None
|
|
# Capture the owner before commit expires the row (avoids a refresh SELECT just to notify).
|
|
owner_id = job.user_id if job else None
|
|
db.commit()
|
|
_notify_download_done(db, owner_id, meta.title, job_id, kind="download")
|
|
log.info("job %s done: %s", job_id, rel)
|
|
|
|
except (_Aborted, editmod.EditAborted):
|
|
# Paused/canceled mid-download or mid-transcode: free the asset for a later retry; keep the
|
|
# job's status (the route set it to paused/canceled). ref_count is adjusted by the route.
|
|
_reset_asset_pending(asset_id)
|
|
log.info("job %s aborted (pause/cancel)", job_id)
|
|
except Exception as exc: # noqa: BLE001 — surface any failure to the user, keep worker alive
|
|
msg = str(exc)[:500]
|
|
with SessionLocal() as db:
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if asset:
|
|
asset.status = "error"
|
|
asset.error = msg
|
|
job = db.get(DownloadJob, job_id)
|
|
if job:
|
|
job.status = "error"
|
|
job.error = msg
|
|
job.error_code = dlerrors.classify(msg)
|
|
job.phase = None
|
|
db.commit()
|
|
log.warning("job %s failed: %s", job_id, msg)
|
|
finally:
|
|
shutil.rmtree(staging, ignore_errors=True)
|
|
|
|
|
|
def _reset_asset_pending(asset_id: int) -> None:
|
|
with SessionLocal() as db:
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if asset and asset.status == "downloading":
|
|
asset.status = "pending"
|
|
db.commit()
|
|
|
|
|
|
# --- editor derivatives (phase 2: trim/crop via ffmpeg) -------------------------------------
|
|
|
|
def _edit_staging_dir(asset_id: int) -> Path:
|
|
return Path(settings.download_root) / ".staging" / f"edit-{asset_id}"
|
|
|
|
|
|
def _fail_edit(job_id: int, asset_id: int, msg: str) -> None:
|
|
with SessionLocal() as db:
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if asset:
|
|
asset.status = "error"
|
|
asset.error = msg
|
|
job = db.get(DownloadJob, job_id)
|
|
if job:
|
|
job.status = "error"
|
|
job.error = msg
|
|
job.error_code = dlerrors.classify(msg)
|
|
job.phase = None
|
|
db.commit()
|
|
log.warning("edit job %s failed: %s", job_id, msg)
|
|
|
|
|
|
def _process_edit(job_id: int, asset_id: int) -> None:
|
|
"""Produce a per-user trim/crop clip from the source asset's downloaded file via ffmpeg."""
|
|
with SessionLocal() as db:
|
|
job = db.get(DownloadJob, job_id)
|
|
src = db.get(MediaAsset, job.source_asset_id) if job and job.source_asset_id else None
|
|
edit_spec = dict(job.edit_spec or {}) if job else {}
|
|
user_id = job.user_id if job else None
|
|
src_ready = src is not None and src.status == "ready" and bool(src.rel_path)
|
|
src_rel = src.rel_path if src else None
|
|
src_w, src_h, src_dur = (src.width, src.height, src.duration_s) if src else (None, None, None)
|
|
|
|
if not src_ready or not src_rel:
|
|
_fail_edit(job_id, asset_id, "The source download is no longer available.")
|
|
return
|
|
src_path = storage.abs_path(settings.download_root, src_rel)
|
|
if not src_path.exists():
|
|
_fail_edit(job_id, asset_id, "The source file is missing.")
|
|
return
|
|
|
|
src_ext = src_path.suffix.lstrip(".").lower() or "mp4"
|
|
crop = editmod.has_crop(edit_spec)
|
|
out_ext = "mp4" if editmod.needs_reencode(edit_spec) else src_ext
|
|
total_s = editmod.clip_duration(edit_spec, src_dur) or src_dur or 0
|
|
staging = _edit_staging_dir(asset_id)
|
|
|
|
try:
|
|
if staging.exists():
|
|
shutil.rmtree(staging, ignore_errors=True)
|
|
staging.mkdir(parents=True, exist_ok=True)
|
|
dest_staging = staging / f"out.{out_ext}"
|
|
|
|
_set_job(job_id, phase="editing", progress=0, speed_bps=None, eta_s=None)
|
|
if edit_spec.get("segments"):
|
|
cmd, prep = editmod.build_concat_plan(src_path, dest_staging, edit_spec, out_ext, staging)
|
|
for p, content in prep.items():
|
|
p.write_text(content, encoding="utf-8")
|
|
else:
|
|
cmd = editmod.build_edit_cmd(src_path, dest_staging, edit_spec, out_ext)
|
|
editmod.run_ffmpeg(
|
|
cmd,
|
|
total_s,
|
|
on_progress=_ffmpeg_progress_writer(job_id, "editing"),
|
|
should_cancel=_cancel_poll(job_id),
|
|
)
|
|
if not dest_staging.exists():
|
|
raise RuntimeError("ffmpeg produced no output file")
|
|
|
|
rel = storage.edit_rel_path(user_id, asset_id, out_ext)
|
|
storage.place_file(dest_staging, settings.download_root, rel)
|
|
final = storage.abs_path(settings.download_root, rel)
|
|
size = final.stat().st_size if final.exists() else None
|
|
_, retention_days = _download_settings()
|
|
expires = datetime.now(timezone.utc) + timedelta(days=retention_days)
|
|
|
|
with SessionLocal() as db:
|
|
asset = db.get(MediaAsset, asset_id)
|
|
if asset:
|
|
asset.status = "ready"
|
|
asset.rel_path = rel
|
|
asset.size_bytes = size
|
|
asset.container = out_ext
|
|
asset.duration_s = total_s or asset.duration_s
|
|
if crop:
|
|
asset.width = edit_spec["crop"]["w"]
|
|
asset.height = edit_spec["crop"]["h"]
|
|
else:
|
|
asset.width, asset.height = src_w, src_h
|
|
asset.error = None
|
|
asset.last_access_at = datetime.now(timezone.utc)
|
|
asset.expires_at = expires
|
|
job = db.get(DownloadJob, job_id)
|
|
if job:
|
|
job.status = "done"
|
|
job.progress = 100
|
|
job.phase = None
|
|
# Capture owner + title before commit expires the rows (avoids a refresh SELECT).
|
|
owner_id = job.user_id if job else None
|
|
dl_title = asset.title if asset else None
|
|
db.commit()
|
|
_notify_download_done(db, owner_id, dl_title, job_id, kind="edit")
|
|
log.info("edit job %s done: %s", job_id, rel)
|
|
|
|
except editmod.EditAborted:
|
|
# Paused/canceled mid-encode: free the asset for a later retry (ref_count is the route's job).
|
|
_reset_asset_pending(asset_id)
|
|
log.info("edit job %s aborted (pause/cancel)", job_id)
|
|
except Exception as exc: # noqa: BLE001 — surface the failure, keep the worker alive
|
|
_fail_edit(job_id, asset_id, str(exc)[:500])
|
|
finally:
|
|
shutil.rmtree(staging, ignore_errors=True)
|
|
|
|
|
|
# --- loop -----------------------------------------------------------------------------------
|
|
|
|
def _worker_loop(idx: int) -> None:
|
|
while not _stop.is_set():
|
|
try:
|
|
job_id = _claim_job()
|
|
except Exception: # noqa: BLE001
|
|
log.exception("claim failed")
|
|
_stop.wait(settings.download_poll_seconds)
|
|
continue
|
|
if job_id is None:
|
|
_stop.wait(settings.download_poll_seconds)
|
|
continue
|
|
try:
|
|
_process_job(job_id)
|
|
except Exception: # noqa: BLE001
|
|
log.exception("processing job %s crashed", job_id)
|
|
_set_job(job_id, status="error", error="Worker error", phase=None)
|
|
|
|
|
|
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
|
|
|
|
# The API may still be applying migrations when we boot. If they never arrive, exit instead of
|
|
# pressing on into a guaranteed crash — with a FAILURE status, so the container comes back under
|
|
# any restart policy (`on-failure` too, not just the `unless-stopped` our composes ship) and the
|
|
# exit code doesn't claim success for a worker that never started working.
|
|
if not _wait_for_schema():
|
|
if _stop.is_set():
|
|
return # asked to shut down while waiting — that IS a clean exit
|
|
raise SystemExit(1)
|
|
_recover_orphans()
|
|
n = max(1, settings.download_worker_concurrency)
|
|
log.info("Download worker started (concurrency=%d, root=%s).", n, settings.download_root)
|
|
threads = [threading.Thread(target=_worker_loop, args=(i,), daemon=True) for i in range(n)]
|
|
for t in threads:
|
|
t.start()
|
|
while not _stop.is_set():
|
|
_stop.wait(1.0)
|
|
log.info("Download worker stopping…")
|
|
for t in threads:
|
|
t.join(timeout=5)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
main()
|