app/tasks/avito_detail_backfill.py imported _CHROME_HEADERS/_avito_proxies from
the legacy app/services/scrape_pipeline.py (the only two symbols it needed from
that module). scrape_pipeline.py is slated for wholesale deletion in Part E of
epic #2277 -- this severs the last dependency so that deletion won't break the
backfill task.
Source chosen: kit-reuse, not relocate. scraper_kit/providers/_base.py (#2358
Foundation) already extracted the identical building blocks while deduplicating
providers/avito/{serp,detail,imv}.py:
- DOCUMENT_HEADERS -- byte-identical dict to _CHROME_HEADERS (same 8 keys/values,
Accept/Accept-Language/Cache-Control/Sec-Fetch-*/Upgrade-Insecure-Requests).
- http_proxies(proxy_url) -- same formula as _avito_proxies():
{"http": url, "https": url} if url else None, just parameterized instead of
reading settings.scraper_proxy_url internally (both resolve the identical
settings singleton in production, so behavior is unchanged).
Kept the AsyncSession(...) construction inline (didn't switch to kit's
build_document_session helper) to preserve the existing
`app.tasks.avito_detail_backfill.AsyncSession` mock seam used by
tests/tasks/test_avito_detail_backfill.py -- swapping to the helper would call
curl_cffi's AsyncSession via scraper_kit.providers._base instead, silently
bypassing that patch target.
scrape_pipeline.py itself is untouched (kept its own copies, per Part E plan).
Full backend suite: 3276 passed, 1 known-unrelated fail (test_search_cache_hit,
#2208), 6 skipped.
Migrates legacy app.services.scrapers.* imports to scraper_kit equivalents for
house_imv_backfill.py, avito_detail_backfill.py, cian_history_backfill.py,
ekb_geoportal_ingest.py, and yandex_detail_backfill.py, proving parity via
tests/support/parity.assert_parity per the epic's gate (#2304).
newbuilding_enrich_backfill.py and yandex_newbuilding_sweep.py are left fully
on legacy imports: both call into scraper_kit.providers.{cian,yandex}.newbuilding,
which construct BrowserFetcher(source=...) without the now-mandatory endpoint=
kwarg (issue #2322, verified still open against the actual provider source, not
just issue status) -- no caller-side fix is possible, matching Group A's (#2305)
precedent for the same bug in admin.py.
Config-gated kit function footguns found and fixed (Group B #2306 pattern):
- avito fetch_detail's backconnect-on-403 retry silently drops when config=
is omitted -- now passes config=RealScraperConfig() explicitly, with a
regression test proving the gate.
- kit AvitoScraper's constructor now requires ScraperConfig positionally --
wired via RealScraperConfig(), which _rotate_ip() reads for
avito_proxy_rotate_url.
- BrowserFetcher(source=...) call sites (house_imv_backfill, avito/cian
detail backfills) now pass the mandatory endpoint=settings.browser_http_endpoint.
New footgun discovered (NOT #2322, flagged for follow-up): kit's
build_warmed_session() builds its curl_cffi session via _build_detail_session()
with no config parameter at all, unlike fetch_detail -- migrating it would
silently drop the sticky MGTS-proxy egress on avito_detail_backfill's
warm-batch path (the prod default). Left build_warmed_session/
_AVITO_WARM_SEARCH_URL on legacy imports, documented inline.
Refs #2310
Деплой (docker recreate tradein-scraper) шлёт SIGTERM с stop_grace_period=120s
(Phase 1). Раньше scheduler_main отвечал hard task.cancel() → бегущий scrape-unit
получал CancelledError посреди браузер-карточки → карточка гибла без COMMIT.
Теперь SIGTERM/SIGINT лишь выставляют кооперативный флаг; tick-loop и длинные
задачи опрашивают его на СВОИХ существующих between-unit checkpoint'ах,
докоммичивают текущий unit и выходят сами.
- app/core/shutdown.py: новый standalone-модуль (asyncio.Event + request_shutdown
/ shutdown_requested / wait_for_shutdown), без app-зависимостей → нет циклов.
- scheduler_main._run: SIGTERM → request_shutdown() вместо task.cancel(); ждём
добровольного drain'а, safety-net wait_for(100s < docker grace) с fallback на
hard-cancel для некооперирующей задачи.
- scheduler_loop: проверка флага в начале тика и после каждого dispatch — не
reap/claim новые run'ы во время shutdown, выходим из loop'а.
- avito_detail_backfill: break на границе карточки рядом с budget-guard; snapshot
pending-query идемпотентен → следующий run сам резюмит остаток.
- import_rosreestr_dkp: расширен is_cancelled checkpoint — drain делает mark_done
(partial), не mark_cancelled; user-cancel семантика без изменений.
Без SIGTERM поведение идентично прежнему. reap_zombies не трогает drained-run'ы
(они mark_done, не 'running').
Tests: tests/core/test_shutdown.py, scheduler_main drain+timeout-fallback,
avito_detail_backfill partial-drain. 26 + 29 scheduler passed.
avito_detail_backfill (mode=browser) aborted prod run 458 with
attempted=5 enriched=0 blocked=5: the lat-null pending queue is dominated
by DEAD listings (404 — that's why they are stale coord-holes). In browser
mode a dead listing's 404 page ("Ошибка 404. Страница не найдена") has no
item-view, so _is_detail_soft_block returned True → AvitoBlockedError →
backfill counted it as `blocked` and the consecutive-block breaker aborted
the run before reaching live listings.
- New AvitoListingGoneError (subclass of common AvitoError, NOT of
AvitoBlockedError/AvitoRateLimitedError) so the backfill block-trap
does not catch it.
- New _is_detail_not_found() detector + browser-mode branch in fetch_detail,
checked BEFORE firewall/soft-block (keyed on the 404 title so it does not
swallow the generic soft-block deflect). Curl path unchanged (404 → 302/
non-200 → ValueError → failed, as before).
- Backfill: new `gone` counter; dedicated except AvitoListingGoneError branch
that is neutral to the consecutive-block breaker and marks the listing
is_active=FALSE (SAVEPOINT) so it leaves the snapshot scope.
Tests: unit for _is_detail_not_found (404 True; soft-block/item-view/empty
False), browser-mode fetch_detail raising AvitoListingGoneError (not Blocked),
and backfill gone-row marks inactive without aborting the breaker.
Soft-block (HTTP 200 generic витрина без item-view) теперь детектится как блок → существующая 403/firewall reconnect-машинерия → ротация exit-IP вместо silent failed (blocked=0, enriched→0 каскад). + snapshot ORDER BY (lat IS NULL) DESC для приоритизации coord-holes (#1967, in-scope 321). Tests: test_avito_detail_soft_block.py. Full tradein suite 2591 passed.
Route each scraper source (avito/cian/yandex/domclick) to its own camoufox
browser+proxy so they no longer wedge each other through a single global egress.
Feature-flagged (FEATURE_BROWSER_POOL_ENABLED, default OFF): with the flag off the
/fetch and /login paths are byte-for-byte the existing single-browser behavior.
When on, /fetch routes by body["source"] to a per-proxy browser via BROWSER_PROXY_MAP
(BROWSER_PROXY_AVITO/CIAN/YANDEX/DOMCLICK with legacy fallbacks), each guarded by its
own lazy-launched lock. /login stays single-browser in Phase 1.
BrowserFetcher gains a source arg (default avito) and sends it in the /fetch body;
all scraper callsites pass their source. No docker-compose/.env.runtime changes
(Phase 2, owner-gated).
- New task app/tasks/avito_detail_backfill.py with run_avito_detail_backfill()
* Single snapshot SELECT at start (guarantees termination)
* Same proxy/AsyncSession path as scrape_pipeline.py step 5
* Budget guard (budget_sec), consecutive block abort (mark_done not mark_failed)
* rotate_ip() on every AvitoBlockedError; rollback on generic Exception (#1368)
* start = time.monotonic() initialized before try so except can reference it
- Scheduler wiring: trigger_avito_detail_backfill_run() + elif in scheduler_loop()
- Migration 112: scrape_schedules INSERT window 09-12 UTC, batch_size=800,
budget_sec=3600, request_delay_sec=6, max_consecutive_blocks=5
- 7 unit tests (no pytest-mock, unittest.mock only): all 7 passing,
full CI suite 1809 passed
