mirror of
https://github.com/R0m1k3/Priceflow.git
synced 2026-10-11 17:29:14 +02:00
288 lines
11 KiB
Python
288 lines
11 KiB
Python
import asyncio
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import logging
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import os
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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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logger = logging.getLogger(__name__)
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BROWSERLESS_URL = os.getenv("BROWSERLESS_URL", "ws://browserless:3000")
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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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".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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# Amazon Interstitials (Added for robustness)
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"button:has-text('Continuer les achats')",
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"span:has-text('Continuer les achats')",
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"a:has-text('Continuer les achats')",
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"input[value='Continuer les achats']",
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"input[value='Continue shopping']",
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"span.a-button-inner > input.a-button-input[type='submit']",
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"form:has-text('Continuer les achats') input[type='submit']",
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"[aria-labelledby='continue-shopping-label']",
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# Didomi / Gifi
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"#didomi-notice-agree-button",
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"button[id='didomi-notice-agree-button']",
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"span:has-text('Accepter & Fermer')",
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"button:has-text('Accepter & Fermer')",
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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 ScraperService:
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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 ScraperService 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("ScraperService 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 ScraperService 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("ScraperService 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 by trying to create a context
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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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# Clear the old 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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# Reconnect
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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 scrape_item(
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url: str,
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selector: str | None = None,
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item_id: int | None = None,
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config: ScrapeConfig | None = None,
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) -> tuple[str | None, str]:
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"""
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Scrapes the given URL using Browserless and Playwright.
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Returns a tuple: (screenshot_path, page_text)
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"""
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if config is None:
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config = ScrapeConfig()
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# Input validation & defaults
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scroll_pixels = max(350, config.scroll_pixels if config.scroll_pixels > 0 else 350)
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timeout = max(30000, config.timeout if config.timeout > 0 else 90000)
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# Ensure browser is connected and healthy
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if not await ScraperService._ensure_browser_connected():
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logger.error("Failed to establish browser connection")
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return None, ""
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try:
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context = await ScraperService._create_context(ScraperService._browser)
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page = await context.new_page()
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try:
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await ScraperService._navigate_and_wait(page, url, timeout)
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await ScraperService._handle_popups(page)
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if selector:
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await ScraperService._wait_for_selector(page, selector)
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else:
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await ScraperService._auto_detect_price(page)
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if config.smart_scroll:
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await ScraperService._smart_scroll(page, scroll_pixels)
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page_text = await ScraperService._extract_text(page, config.text_length)
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screenshot_path = await ScraperService._take_screenshot(page, url, item_id)
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return screenshot_path, page_text
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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 None, ""
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@staticmethod
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async def _connect_browser(p) -> Browser:
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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)
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@staticmethod
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async def _create_context(browser: Browser) -> BrowserContext:
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context = await browser.new_context(
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viewport={"width": 1920, "height": 1080},
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user_agent=(
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"Mozilla/5.0 (Windows NT 10.0; Win64; x64) "
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"AppleWebKit/537.36 (KHTML, like Gecko) "
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"Chrome/120.0.0.0 Safari/537.36"
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),
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)
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# Stealth mode / Ad blocking attempts
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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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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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# Wait a bit for dynamic content
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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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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 _wait_for_selector(page: Page, selector: str):
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try:
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logger.info(f"Waiting for selector: {selector}")
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await page.wait_for_selector(selector, timeout=5000)
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element = page.locator(selector).first
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await element.scroll_into_view_if_needed()
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logger.info(f"Scrolled to selector: {selector}")
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except Exception as e:
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logger.warning(f"Selector {selector} not found or timed out: {e}")
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@staticmethod
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async def _auto_detect_price(page: Page):
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logger.info("No selector provided. Attempting to find price element...")
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try:
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price_locator = page.locator("text=/$[0-9,]+(\\.[0-9]{2})?/")
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if await price_locator.count() > 0:
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await price_locator.first.scroll_into_view_if_needed()
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logger.info("Scrolled to potential price element")
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except Exception as e:
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logger.warning(f"Auto-price detection failed: {e}")
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@staticmethod
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async def _smart_scroll(page: Page, scroll_pixels: int):
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logger.info(f"Performing smart scroll ({scroll_pixels}px)...")
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try:
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await page.evaluate(f"window.scrollBy(0, {scroll_pixels})")
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await page.wait_for_timeout(1000)
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except Exception as e:
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logger.warning(f"Smart scroll failed: {e}")
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@staticmethod
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async def _extract_text(page: Page, text_length: int) -> str:
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if text_length <= 0:
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return ""
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try:
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logger.info(f"Extracting text (limit: {text_length} chars)...")
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raw_text = await page.inner_text("body")
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page_text = raw_text[:text_length]
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logger.info(f"Extracted {len(page_text)} characters")
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return page_text
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except Exception as e:
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logger.error(f"Text extraction failed: {e}")
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return ""
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@staticmethod
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async def _take_screenshot(page: Page, url: str, item_id: int | None) -> str:
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screenshot_dir = "screenshots"
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os.makedirs(screenshot_dir, exist_ok=True)
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if item_id:
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# Use timestamp to ensure unique filenames (fixes caching issues)
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timestamp = int(datetime.now().timestamp())
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filename = f"{screenshot_dir}/item_{item_id}_{timestamp}.png"
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else:
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url_part = url.split("//")[-1].replace("/", "_")
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timestamp = datetime.now().timestamp()
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filename = f"{screenshot_dir}/{url_part}_{timestamp}.png"
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await page.screenshot(path=filename, full_page=False)
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logger.info(f"Screenshot saved to {filename}")
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return filename
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