mirror of
https://github.com/R0m1k3/Priceflow.git
synced 2026-10-11 17:29:14 +02:00
432 lines
17 KiB
Python
432 lines
17 KiB
Python
"""
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Browserless Service - Enhanced Version
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Manages connections to Browserless.io with advanced robustness features:
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- Auto-reconnection on browser disconnection
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- Advanced popup handling
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- Flexible configuration
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- Thread-safe operations
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- Amazon & Generic price extraction
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"""
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import asyncio
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import logging
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import os
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import re
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import time
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from dataclasses import dataclass
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from datetime import datetime
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from playwright.async_api import Browser, BrowserContext, Page, async_playwright
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from playwright.async_api import TimeoutError as PlaywrightTimeoutError
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from app.core.search_config import (
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BROWSERLESS_URL,
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get_random_user_agent,
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)
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logger = logging.getLogger(__name__)
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# Comprehensive popup selectors
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POPUP_SELECTORS = [
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"button[aria-label='Close']",
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"button[aria-label='close']",
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"button[aria-label='Fermer']",
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".close-button",
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".modal-close",
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"svg[data-name='Close']",
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"[class*='popup'] button",
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"[class*='modal'] button",
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"button:has-text('No, thanks')",
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"button:has-text('No thanks')",
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"a:has-text('No, thanks')",
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"div[role='dialog'] button[aria-label='Close']",
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# Cookie banners
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"#sp-cc-accept",
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"#onetrust-accept-btn-handler",
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"button:has-text('Tout accepter')",
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"button:has-text('Accepter')",
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]
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@dataclass
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class ScrapeConfig:
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"""Configuration for scraping parameters."""
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smart_scroll: bool = False
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scroll_pixels: int = 350
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text_length: int = 0
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timeout: int = 90000
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class BrowserlessService:
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"""Enhanced browserless service with auto-reconnection and robust error handling."""
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_playwright = None
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_browser: Browser | None = None
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_lock = asyncio.Lock()
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@classmethod
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async def initialize(cls):
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"""Initialize the shared browser instance (Public, Thread-Safe)."""
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async with cls._lock:
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await cls._initialize()
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@classmethod
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async def _initialize(cls):
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"""Internal initialization logic (Assumes lock is held)."""
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if cls._browser is None:
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logger.info("Initializing BrowserlessService shared browser...")
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cls._playwright = await async_playwright().start()
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cls._browser = await cls._connect_browser(cls._playwright)
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logger.info("BrowserlessService initialized.")
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@classmethod
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async def shutdown(cls):
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"""Shutdown the shared browser instance."""
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async with cls._lock:
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if cls._browser:
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logger.info("Shutting down BrowserlessService shared browser...")
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await cls._browser.close()
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cls._browser = None
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if cls._playwright:
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await cls._playwright.stop()
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cls._playwright = None
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logger.info("BrowserlessService shutdown complete.")
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@classmethod
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async def _ensure_browser_connected(cls) -> bool:
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"""Ensure browser is connected, reconnect if needed."""
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async with cls._lock:
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try:
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if cls._browser is None:
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logger.warning("Browser not initialized, initializing...")
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await cls._initialize()
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return cls._browser is not None
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# Test if browser is still alive
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try:
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test_context = await cls._browser.new_context()
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await test_context.close()
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return True
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except Exception as e:
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logger.error(f"Browser connection test failed: {e}")
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logger.info("Attempting to reconnect browser...")
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cls._browser = None
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if cls._playwright:
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try:
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await cls._playwright.stop()
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except Exception:
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pass
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cls._playwright = None
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await cls._initialize()
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return cls._browser is not None
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except Exception as e:
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logger.error(f"Failed to ensure browser connection: {e}")
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return False
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@staticmethod
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async def _connect_browser(p) -> Browser:
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"""Connect to Browserless."""
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logger.info(f"Connecting to Browserless at {BROWSERLESS_URL}")
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return await p.chromium.connect_over_cdp(BROWSERLESS_URL, timeout=60000)
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@staticmethod
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async def _create_context(browser: Browser, use_proxy: bool = False) -> BrowserContext:
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"""Create a new browser context with stealth settings."""
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user_agent = get_random_user_agent()
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options = {
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"viewport": {"width": 1920, "height": 1080},
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"user_agent": user_agent,
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"locale": "fr-FR",
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"timezone_id": "Europe/Paris",
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"java_script_enabled": True,
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"bypass_csp": True,
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"extra_http_headers": {
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"Accept-Language": "fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7",
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"Sec-Ch-Ua-Platform": '"Windows"',
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"Upgrade-Insecure-Requests": "1",
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},
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}
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if use_proxy:
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logger.info("Proxy support requested (not implemented in this version)")
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context = await browser.new_context(**options)
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await context.route("**/*", lambda route: route.continue_())
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return context
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@staticmethod
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async def _navigate_and_wait(page: Page, url: str, timeout: int):
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"""Navigate to URL and wait for page load."""
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logger.info(f"Navigating to {url} (Timeout: {timeout}ms)")
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try:
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await page.goto(url, wait_until="domcontentloaded", timeout=timeout)
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logger.info(f"Page loaded (domcontentloaded): {url}")
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try:
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await page.wait_for_load_state("networkidle", timeout=5000)
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logger.info("Network idle reached")
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except PlaywrightTimeoutError:
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logger.info("Network idle timed out (non-critical), proceeding...")
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except Exception as e:
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logger.warning(f"Navigation warning for {url}: {e}")
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await page.wait_for_timeout(2000)
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@staticmethod
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async def _handle_popups(page: Page):
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"""Attempt to close popups and cookie banners."""
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logger.info("Attempting to close popups...")
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for popup_selector in POPUP_SELECTORS:
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try:
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if await page.locator(popup_selector).count() > 0:
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logger.info(f"Found popup close button: {popup_selector}")
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await page.locator(popup_selector).first.click(timeout=2000)
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await page.wait_for_timeout(1000)
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except Exception:
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pass
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try:
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await page.keyboard.press("Escape")
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except Exception:
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pass
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@staticmethod
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async def _extract_amazon_price(page: Page) -> str:
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"""Extract price from Amazon product page."""
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price_selectors = [
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".a-price .a-offscreen",
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"#corePrice_desktop .a-price .a-offscreen",
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"#corePriceDisplay_desktop_feature_div .a-price .a-offscreen",
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".a-price[data-a-color='price'] .a-offscreen",
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"#priceblock_ourprice",
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"#priceblock_dealprice",
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"span.a-price-whole",
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]
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for selector in price_selectors:
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try:
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element = page.locator(selector).first
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price_text = await element.inner_text(timeout=2000)
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if price_text and price_text.strip():
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logger.info(f"Extracted Amazon price via {selector}: {price_text}")
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return price_text.strip()
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except Exception:
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continue
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# Try combination: whole + fraction
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try:
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whole = await page.locator("span.a-price-whole").first.inner_text()
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fraction = await page.locator("span.a-price-fraction").first.inner_text()
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if whole and fraction:
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price_text = f"{whole}{fraction}"
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logger.info(f"Extracted Amazon price from whole+fraction: {price_text}")
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return price_text
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except Exception:
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pass
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logger.warning("Could not extract Amazon price")
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return ""
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@staticmethod
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async def _extract_generic_price(page: Page) -> str:
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"""Extract price from generic e-commerce pages."""
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price_selectors = [
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"[itemprop='price']",
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"[data-testid='price']",
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"[data-test='price']",
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".current-price",
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".sale-price",
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".final-price",
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".product-price",
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".special-price",
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"[data-price]",
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".price-current",
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".price-now",
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".price-sales",
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"[class*='price']:not([class*='old']):not([class*='was']):not([class*='original']):not([class*='before']):not([class*='regular']):not([class*='strike']):not([class*='barre'])",
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"#price",
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"#product-price",
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"span[class*='prix']:not([class*='ancien']):not([class*='barre'])",
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".prix-actuel",
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".price:not(.old-price):not(.was-price)",
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]
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found_prices = []
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for selector in price_selectors:
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try:
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elements = page.locator(selector)
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count = await elements.count()
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for i in range(min(count, 3)):
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try:
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element = elements.nth(i)
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if await element.is_visible(timeout=1000):
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# Check if strikethrough
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try:
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text_decoration = await element.evaluate("el => window.getComputedStyle(el).textDecoration")
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if "line-through" in text_decoration:
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continue
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except Exception:
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pass
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price_text = await element.inner_text()
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if price_text and ('€' in price_text or (',' in price_text and any(c.isdigit() for c in price_text))):
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price_text = price_text.strip()
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# Validate price range
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numeric_match = re.search(r'(\d+[.,]?\d*)', price_text.replace(' ', '').replace('\xa0', ''))
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if numeric_match:
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try:
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price_val = float(numeric_match.group(1).replace(',', '.'))
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if 0.01 <= price_val <= 100000:
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found_prices.append((selector, price_text))
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logger.info(f"Found valid price via {selector}: {price_text}")
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# Return high-priority immediately
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if selector in ["[itemprop='price']", "[data-testid='price']", ".current-price", ".sale-price", ".final-price", ".product-price"]:
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return price_text
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except (ValueError, AttributeError):
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continue
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except Exception:
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continue
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except Exception:
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continue
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if found_prices:
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best_price = found_prices[-1][1]
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if len(found_prices) > 1:
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logger.info(f"Multiple prices found, selecting last: {best_price}")
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return best_price
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# Regex fallback
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try:
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all_text = await page.inner_text('body')
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price_matches = re.findall(r'\d+[,\.]\d{2}\s*€', all_text)
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if price_matches:
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logger.info(f"Found price via regex: {price_matches[0]}")
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return price_matches[0]
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except Exception:
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pass
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logger.warning("Could not extract generic price")
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return ""
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@classmethod
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async def get_page_content(
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cls,
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url: str,
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use_proxy: bool = False,
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wait_selector: str | None = None,
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extract_text: bool = False
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) -> tuple[str, str]:
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"""
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Fetch page content with full stealth lifecycle.
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Args:
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url: URL to fetch
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use_proxy: Whether to use proxy
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wait_selector: CSS selector to wait for
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extract_text: If True, returns visible text; if False, returns HTML
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Returns:
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tuple[content, screenshot_path]: Content (HTML or text) and screenshot path
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"""
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# Ensure browser connected
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if not await cls._ensure_browser_connected():
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logger.error("Failed to establish browser connection")
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return "", ""
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try:
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context = await cls._create_context(cls._browser, use_proxy=use_proxy)
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page = await context.new_page()
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try:
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await cls._navigate_and_wait(page, url, 90000)
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await cls._handle_popups(page)
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# Amazon-specific wait
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if "amazon" in url.lower() and "/dp/" in url:
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amazon_selectors = [".a-price .a-offscreen", "#corePriceDisplay_desktop_feature_div"]
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for selector in amazon_selectors:
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try:
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await page.wait_for_selector(selector, timeout=5000, state="visible")
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logger.info(f"Amazon price element found: {selector}")
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break
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except Exception:
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continue
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# Extract content
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if extract_text:
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content = await page.inner_text('body')
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logger.info(f"Extracted {len(content)} chars of visible text")
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# Normalize French prices
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content = re.sub(r'(\d+)€(\d{2})\b', r'\1.\2 €', content)
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content = re.sub(r'(\d+),(\d{2})\s*€', r'\1.\2 €', content)
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content = re.sub(r'(\d+)\s(\d{3})', r'\1\2', content)
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# Extract price
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extracted_price = ""
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if "amazon" in url.lower() and "/dp/" in url:
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extracted_price = await cls._extract_amazon_price(page)
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else:
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extracted_price = await cls._extract_generic_price(page)
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# Prepend normalized price
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if extracted_price:
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normalized_price = re.sub(r'(\d+)€(\d{2})', r'\1.\2 €', extracted_price)
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normalized_price = re.sub(r'(\d+),(\d{2})', r'\1.\2', normalized_price)
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normalized_price = normalized_price.replace(' ', '')
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content = f"PRIX DÉTECTÉ: {normalized_price}\n\n{content}"
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logger.info(f"Prepended price: {normalized_price}")
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else:
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content = await page.content()
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# Take screenshot
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screenshot_path = ""
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try:
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os.makedirs("/app/screenshots", exist_ok=True)
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timestamp = int(time.time() * 1000)
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safe_name = "".join(c if c.isalnum() else "_" for c in url.split("//")[-1])[:50]
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screenshot_path = f"/app/screenshots/{safe_name}_{timestamp}.jpg"
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is_amazon = "amazon" in url.lower() and "/dp/" in url
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if is_amazon:
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# Focused Amazon screenshot
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for selector in ["#dp-container", "#ppd", "#centerCol"]:
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try:
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element = page.locator(selector).first
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if await element.is_visible():
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await element.screenshot(path=screenshot_path, quality=85, type="jpeg")
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logger.info(f"Amazon focused screenshot: {selector}")
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break
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except Exception:
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continue
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else:
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await page.screenshot(path=screenshot_path, full_page=False, quality=80, type="jpeg")
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else:
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await page.screenshot(path=screenshot_path, full_page=False, quality=80, type="jpeg")
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logger.info(f"Screenshot saved to {screenshot_path}")
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except Exception as e:
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logger.warning(f"Screenshot failed: {e}")
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return content, screenshot_path
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finally:
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await context.close()
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except Exception as e:
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logger.error(f"Error scraping {url}: {e}")
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return "", ""
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# Global instance
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browserless_service = BrowserlessService()
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