Files
siftlode/backend/app/downloads/backfill.py
T
peter 0cff964ff2 refactor(logs): name every logger after its module, and hold it there
25 literal names covered 34 modules. plex/client.py, plex/stream.py,
plex/subtitles.py, plex/sync.py and two Plex route modules all called themselves
`siftlode.plex`; downloads/pipeline.py called itself `siftlode.worker`;
routes/channels.py called itself `siftlode.api`. The `logger` column is in every
stored row so E22.6's console can filter on it, and so an operator can pin a level
to one part of the system — neither works when six modules share a name.

`logs.get_logger(__name__)` derives it: app/plex/sync.py -> siftlode.plex.sync.
One name per module, and it cannot drift from the file it sits in.
tests/test_logger_names.py pins the derivation, that everything stays under the
one `siftlode` tree the handler and the tests attach to, and that no module
hand-rolls a name again unless the line says why (`# logger-name-ok: <why>`).
Two do: get_logger's own call, and `siftlode.http`, which is named for the traffic
it carries rather than the module it lives in — it replaced uvicorn's access log
and is what an operator pins when they want request lines and nothing else.

app/scheduler.py called its logger `logger`; every other module calls it `log`.

ruff gains LOG, G, T20, TRY400, TRY401 and S112. Four findings cleared with them:
worker.py logged `str(exc)[:120]` where the traceback was the whole question, and
three prints/f-strings that are deliberate now say so on the line. S110 and BLE001
stay off until S3 — 23 handlers are outstanding and each is a judgement about one
of them; enabling the rules first would just mean 23 blanket noqas.
2026-09-18 00:57:57 +02:00

97 lines
4.1 KiB
Python

"""One-off backfill for downloads made before per-asset channel URLs + poster fallbacks existed.
Fills `media_assets.uploader_url` (re-extracting metadata for YouTube/Facebook sources, so an
auto-detected channel becomes a clickable link) and `poster_path` (an ffmpeg frame for
thumbnail-less sources, so the card / watch page / link preview still shows an image). Best-effort
and safe to re-run: it only touches assets still missing the field, and only re-fetches YouTube /
Facebook sources (a direct media URL like a reddit HLS manifest carries no channel and its signed
URL may have expired — those just get a locally-generated poster instead).
Run once per environment:
docker exec siftlode-worker-1 python -c "from app.downloads import backfill; print(backfill.run())"
"""
from urllib.parse import urlsplit
import yt_dlp
from sqlalchemy import select
from app import logs
from app.config import settings
from app.db import SessionLocal
from app.downloads import adapters
from app.downloads import edit as editmod
from app.downloads import formats, service
from app.models import MediaAsset
log = logs.get_logger(__name__)
def _extract_meta(url: str, adapter: adapters.SourceAdapter, asset_id: int) -> dict | None:
"""Metadata-only yt-dlp extraction, using the source adapter's client sets + options (YouTube
needs the POT/player-client strategy even just to extract)."""
for clients in adapter.client_sets():
opts = formats.build_ydl_opts(
{}, "%(id)s.%(ext)s", lambda d: None, extra=adapter.ydl_opts_extra(clients)
)
opts["skip_download"] = True
try:
with yt_dlp.YoutubeDL(opts) as ydl:
info = ydl.extract_info(url, download=False)
if info:
return info
except Exception as exc: # noqa: BLE001 — best-effort backfill, keep going
# The asset id, not the URL. A source URL is a row of this user's download
# history, and `redact_text` only takes credential params out of it — the rest
# of it goes in whole. The id names the same asset to anyone holding the
# database and nothing at all to anyone who is not; the host is kept because it
# is what decides which client set was tried.
log.info(
"meta extract failed for asset %s on %s (%s): %s",
asset_id,
urlsplit(url).hostname or "?", # log-pii-ok: the host, never the path or query
clients,
str(exc)[:100],
)
return None
def run() -> dict:
filled_url = filled_poster = 0
with SessionLocal() as db:
assets = (
db.execute(
select(MediaAsset).where(
MediaAsset.status == "ready", MediaAsset.rel_path.is_not(None)
)
)
.scalars()
.all()
)
for a in assets:
adapter = adapters.resolve_adapter(a.source_kind, a.source_ref)
if a.uploader_url is None and adapter.wants_metadata_backfill():
url = a.source_webpage_url or service.source_url(a.source_kind, a.source_ref)
info = _extract_meta(url, adapter, a.id)
uu = adapter.uploader_url(info) if info else None
if uu:
a.uploader_url = uu
filled_url += 1
log.info("asset %s uploader_url <- %s", a.id, uu)
if a.poster_path is None:
# Record a self-hosted poster for every download (the reliable og:image source):
# ensure_poster returns the existing <base>.jpg thumbnail sidecar, or cuts a frame.
rel = editmod.ensure_poster(a, settings.download_root)
if rel:
a.poster_path = rel
filled_poster += 1
log.info("asset %s poster <- %s", a.id, rel)
db.commit()
result = {
"assets": len(assets),
"filled_uploader_url": filled_url,
"filled_poster": filled_poster,
}
log.info("backfill done: %s", result)
return result