435 lines
17 KiB
Python
435 lines
17 KiB
Python
"""scrape_pipeline.py — Avito full orchestrator (Stage 2e + city sweep).
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Координирует 5 шагов одного pipeline run:
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1. SEARCH — AvitoScraper().fetch_around(lat, lon, radius_m, pages=N)
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2. SAVE — save_listings(db, lots) → (inserted, updated)
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3. GROUP — dedupe house_url из lots → unique set
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4. ENRICH_HOUSES — fetch_house_catalog + save_house_catalog_enrichment per unique house
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5. ENRICH_DETAIL — top-N listings (detail_enriched_at IS NULL) → fetch_detail + save
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City sweep: run_avito_city_sweep — итерирует EKB_ANCHORS × pages_per_anchor,
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с cooperative cancel через scrape_runs.status и heartbeat update каждый anchor.
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Anti-bot hardening (2023-05-23):
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- Shared AsyncSession на весь sweep (один TLS handshake)
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- asyncio.sleep с random +-20% jitter между detail requests
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- AvitoBlockedError/AvitoRateLimitedError propagation → early abort
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- После 3 consecutive blocks — abort sweep + mark_banned (status='banned')
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Graceful degradation на каждом step: exception в одной house/listing
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не валит весь pipeline (кроме blocked exceptions — они abort весь sweep).
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IMV ОТСУТСТВУЕТ — он on-demand (Stage 3 estimator integration), не cron.
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"""
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from __future__ import annotations
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import asyncio
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import logging
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import random
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from dataclasses import dataclass, field, fields
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from urllib.parse import urlparse
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from curl_cffi.requests import AsyncSession
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from sqlalchemy import text
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from sqlalchemy.orm import Session
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from app.services import scrape_runs
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from app.services.scrapers.avito import AvitoScraper
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from app.services.scrapers.avito_detail import fetch_detail, save_detail_enrichment
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from app.services.scrapers.avito_exceptions import AvitoBlockedError, AvitoRateLimitedError
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from app.services.scrapers.avito_houses import fetch_house_catalog, save_house_catalog_enrichment
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from app.services.scrapers.base import ScrapedLot, save_listings
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logger = logging.getLogger(__name__)
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# Default anchors ЕКБ — 5 точек покрытия города
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EKB_ANCHORS: list[tuple[float, float, str]] = [
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(56.8400, 60.6050, "Центр"),
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(56.7950, 60.5300, "ЮЗ"),
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(56.8970, 60.6100, "Уралмаш"),
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(56.7700, 60.5500, "Академический"),
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(56.8650, 60.6200, "Пионерский"),
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]
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_CHROME_HEADERS = {
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"Accept": "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8",
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"Accept-Language": "ru-RU,ru;q=0.9,en;q=0.8",
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"Cache-Control": "max-age=0",
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"Sec-Fetch-Dest": "document",
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"Sec-Fetch-Mode": "navigate",
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"Sec-Fetch-Site": "none",
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"Sec-Fetch-User": "?1",
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"Upgrade-Insecure-Requests": "1",
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}
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# ── Result dataclasses ──────────────────────────────────────────
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@dataclass
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class PipelineCounters:
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"""Counters одного pipeline run для логов/админки."""
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lots_fetched: int = 0
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lots_inserted: int = 0
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lots_updated: int = 0
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unique_houses: int = 0
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houses_enriched: int = 0
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houses_failed: int = 0
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detail_attempted: int = 0
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detail_enriched: int = 0
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detail_failed: int = 0
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errors: list[str] = field(default_factory=list)
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@dataclass
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class PipelineResult:
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"""Полный результат full Avito pipeline."""
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anchor_lat: float
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anchor_lon: float
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radius_m: int
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counters: PipelineCounters
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enrich_houses: bool
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enrich_detail_top_n: int
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# ── Main orchestrator ───────────────────────────────────────────
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async def run_avito_pipeline(
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db: Session,
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lat: float,
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lon: float,
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radius_m: int = 1500,
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*,
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enrich_houses: bool = True,
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enrich_detail_top_n: int = 10,
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pages: int = 1,
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request_delay_sec: float | None = None,
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shared_session: AsyncSession | None = None,
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) -> PipelineResult:
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"""Full Avito search → houses → detail enrichment pipeline.
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Steps:
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1. SEARCH: AvitoScraper().fetch_around(lat, lon, radius_m, pages=pages)
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2. SAVE: save_listings(db, lots) → (inserted, updated)
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3. GROUP: dedupe house_url из новых lots → unique house path set
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4. ENRICH_HOUSES: fetch_house_catalog + save per house (with sleep between)
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5. ENRICH_DETAIL: top-N listings → fetch_detail + save (abort on 3 blocks)
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shared_session — если передан, используется без закрытия (lifecycle у вызывающего).
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AvitoBlockedError / AvitoRateLimitedError propagate наружу.
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"""
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counters = PipelineCounters()
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lots: list[ScrapedLot] = []
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detail_delay = request_delay_sec if request_delay_sec is not None else 7.0
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own_session = shared_session is None
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session = shared_session or AsyncSession(
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impersonate="chrome120",
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timeout=25,
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headers=_CHROME_HEADERS,
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)
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try:
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# ── Step 1: search ──────────────────────────────────────
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scraper = AvitoScraper()
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scraper._cffi = session
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try:
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lots = await scraper.fetch_around(
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lat, lon, radius_m,
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pages=pages,
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delay_override_sec=request_delay_sec,
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)
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counters.lots_fetched = len(lots)
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logger.info(
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"pipeline:search anchor=(%.4f,%.4f) r=%dm fetched=%d",
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lat, lon, radius_m, len(lots),
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)
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except (AvitoBlockedError, AvitoRateLimitedError):
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logger.error(
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"pipeline:search BLOCKED by Avito at anchor=(%.4f,%.4f)", lat, lon
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)
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raise
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except Exception as e:
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logger.exception("pipeline:search failed")
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counters.errors.append(f"search: {e}")
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return PipelineResult(
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lat, lon, radius_m, counters, enrich_houses, enrich_detail_top_n
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)
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# ── Step 2: save listings ───────────────────────────────
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if lots:
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try:
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counters.lots_inserted, counters.lots_updated = save_listings(db, lots)
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except Exception as e:
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logger.exception("pipeline:save_listings failed")
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counters.errors.append(f"save_listings: {e}")
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# ── Step 3: group by house ──────────────────────────────
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unique_house_paths: set[str] = set()
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for lot in lots:
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if lot.house_url:
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try:
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parsed = urlparse(lot.house_url)
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path = parsed.path if parsed.path else lot.house_url
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unique_house_paths.add(path)
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except Exception:
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continue
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counters.unique_houses = len(unique_house_paths)
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logger.info("pipeline:group_by_house unique=%d", counters.unique_houses)
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# ── Step 4: enrich houses с shared session + sleep ──────
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if enrich_houses and unique_house_paths:
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house_paths_list = list(unique_house_paths)
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for idx, house_path in enumerate(house_paths_list):
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try:
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enrichment = await fetch_house_catalog(house_path, cffi_session=session)
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save_house_catalog_enrichment(db, enrichment)
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counters.houses_enriched += 1
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except (AvitoBlockedError, AvitoRateLimitedError):
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logger.error(
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"pipeline:house BLOCKED at %s — propagating", house_path
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)
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raise
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except Exception as e:
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logger.warning(
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"pipeline:house_enrich failed for %s: %s", house_path, e
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)
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counters.houses_failed += 1
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counters.errors.append(f"house {house_path}: {e}")
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if idx < len(house_paths_list) - 1:
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await asyncio.sleep(detail_delay)
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# ── Step 5: enrich detail для top-N priority listings ───
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if enrich_detail_top_n > 0:
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priority_rows = db.execute(
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text("""
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SELECT source_url
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FROM listings
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WHERE source = 'avito'
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AND source_url IS NOT NULL
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AND (
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(
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detail_enriched_at IS NULL
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AND price_rub > 0
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AND ST_DWithin(
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geom::geography,
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ST_MakePoint(:lon, :lat)::geography,
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:radius
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)
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)
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OR (
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detail_enriched_at IS NULL
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AND scraped_at > NOW() - INTERVAL '2 hours'
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)
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)
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ORDER BY scraped_at DESC NULLS LAST
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LIMIT :limit
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"""),
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{
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"lat": lat,
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"lon": lon,
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"radius": radius_m * 2,
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"limit": enrich_detail_top_n,
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},
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).mappings().all()
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consecutive_blocks = 0
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for idx, row in enumerate(priority_rows):
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source_url: str = row["source_url"]
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counters.detail_attempted += 1
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try:
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item_url = (
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urlparse(source_url).path
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if source_url.startswith("http")
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else source_url
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)
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enrichment_detail = await fetch_detail(item_url, cffi_session=session)
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if save_detail_enrichment(db, enrichment_detail):
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counters.detail_enriched += 1
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consecutive_blocks = 0
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except (AvitoBlockedError, AvitoRateLimitedError) as e:
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consecutive_blocks += 1
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counters.detail_failed += 1
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counters.errors.append(f"BLOCKED_DETAIL #{idx}: {e}")
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logger.warning(
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"pipeline:detail BLOCKED #%d/%d (consecutive=%d): %s",
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idx + 1, len(priority_rows), consecutive_blocks, e,
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)
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if consecutive_blocks >= 3:
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logger.error(
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"pipeline:detail ABORT — %d consecutive blocks, IP rate-limited",
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consecutive_blocks,
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)
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counters.errors.append(
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f"AVITO_RATE_LIMITED — sweep aborted after "
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f"{idx + 1}/{len(priority_rows)} details"
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)
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raise
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except Exception as e:
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counters.detail_failed += 1
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counters.errors.append(f"detail {source_url}: {e}")
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logger.warning(
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"pipeline:detail_enrich failed for %s: %s", source_url, e
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)
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consecutive_blocks = 0
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if idx < len(priority_rows) - 1:
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jitter = random.uniform(0.8, 1.2)
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await asyncio.sleep(detail_delay * jitter)
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logger.info(
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"pipeline:done anchor=(%.4f,%.4f) lots=%d (ins=%d/upd=%d) "
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"houses=%d/%d detail=%d/%d errors=%d",
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lat, lon,
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counters.lots_fetched, counters.lots_inserted, counters.lots_updated,
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counters.houses_enriched, counters.unique_houses,
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counters.detail_enriched, counters.detail_attempted,
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len(counters.errors),
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)
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return PipelineResult(lat, lon, radius_m, counters, enrich_houses, enrich_detail_top_n)
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finally:
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if own_session:
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await session.close()
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@dataclass
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class CitySweepCounters:
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"""Aggregate counters для full city sweep run."""
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anchors_total: int = 0
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anchors_done: int = 0
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lots_fetched: int = 0
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lots_inserted: int = 0
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lots_updated: int = 0
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unique_houses: int = 0
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houses_enriched: int = 0
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houses_failed: int = 0
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detail_attempted: int = 0
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detail_enriched: int = 0
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detail_failed: int = 0
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errors_count: int = 0
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def to_dict(self) -> dict[str, int]:
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return {f.name: getattr(self, f.name) for f in fields(self)}
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async def run_avito_city_sweep(
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db: Session,
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*,
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run_id: int,
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anchors: list[tuple[float, float, str]] | None = None,
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radius_m: int = 1500,
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pages_per_anchor: int = 3,
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enrich_houses: bool = True,
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detail_top_n: int = 10,
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request_delay_sec: float = 7.0,
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) -> CitySweepCounters:
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"""Full city sweep: iterate anchors × pages → save → enrich houses + detail.
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- Single shared AsyncSession на весь sweep (один TLS fingerprint)
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- AvitoBlockedError/AvitoRateLimitedError → ABORT sweep + mark_banned (status='banned')
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- Прочие errors per-anchor логируются, не валят весь sweep
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"""
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_anchors = anchors if anchors is not None else EKB_ANCHORS
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counters = CitySweepCounters(anchors_total=len(_anchors))
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async with AsyncSession(
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impersonate="chrome120",
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timeout=25,
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headers=_CHROME_HEADERS,
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) as session:
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try:
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for idx, (lat, lon, name) in enumerate(_anchors, start=1):
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if scrape_runs.is_cancelled(db, run_id):
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logger.info(
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"city-sweep run_id=%d: cancelled at anchor #%d/%d (%s)",
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run_id, idx, len(_anchors), name,
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)
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scrape_runs.update_heartbeat(db, run_id, counters.to_dict())
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return counters
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logger.info(
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"city-sweep run_id=%d anchor #%d/%d (%s, %.4f, %.4f)",
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run_id, idx, len(_anchors), name, lat, lon,
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)
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try:
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result = await run_avito_pipeline(
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db,
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lat=lat,
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lon=lon,
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radius_m=radius_m,
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enrich_houses=enrich_houses,
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enrich_detail_top_n=detail_top_n,
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pages=pages_per_anchor,
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request_delay_sec=request_delay_sec,
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shared_session=session,
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)
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counters.lots_fetched += result.counters.lots_fetched
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counters.lots_inserted += result.counters.lots_inserted
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counters.lots_updated += result.counters.lots_updated
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counters.unique_houses += result.counters.unique_houses
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counters.houses_enriched += result.counters.houses_enriched
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counters.houses_failed += result.counters.houses_failed
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counters.detail_attempted += result.counters.detail_attempted
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counters.detail_enriched += result.counters.detail_enriched
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counters.detail_failed += result.counters.detail_failed
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counters.errors_count += len(result.counters.errors)
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except (AvitoBlockedError, AvitoRateLimitedError) as e:
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logger.error(
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"city-sweep run_id=%d ABORT at anchor #%d/%d (%s) — blocked: %s",
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run_id, idx, len(_anchors), name, e,
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)
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counters.errors_count += 1
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counters.anchors_done = idx
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scrape_runs.update_heartbeat(db, run_id, counters.to_dict())
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scrape_runs.mark_banned(db, run_id, str(e), counters.to_dict())
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return counters
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except Exception:
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logger.exception(
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"city-sweep run_id=%d: anchor %s failed", run_id, name
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)
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counters.errors_count += 1
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counters.anchors_done = idx
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scrape_runs.update_heartbeat(db, run_id, counters.to_dict())
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scrape_runs.mark_done(db, run_id, counters.to_dict())
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logger.info(
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"city-sweep run_id=%d done: anchors=%d/%d lots=%d (ins=%d/upd=%d) "
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"houses=%d/%d detail=%d/%d errors=%d",
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run_id,
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counters.anchors_done,
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counters.anchors_total,
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counters.lots_fetched,
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counters.lots_inserted,
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counters.lots_updated,
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counters.houses_enriched,
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counters.unique_houses,
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counters.detail_enriched,
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counters.detail_attempted,
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counters.errors_count,
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)
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return counters
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except Exception as exc:
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logger.exception("city-sweep run_id=%d: fatal error", run_id)
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scrape_runs.mark_failed(db, run_id, str(exc), counters.to_dict())
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raise
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# ── Public re-exports ───────────────────────────────────────────
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__all__ = [
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"EKB_ANCHORS",
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"CitySweepCounters",
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"PipelineCounters",
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"PipelineResult",
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"run_avito_city_sweep",
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"run_avito_pipeline",
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]
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