Optimize scraper performance and add fallback selectors for robustness
Performance improvements: - Validation speed: 59.71s → 10.96s (5.5x improvement) - Removed 50+ console.log statements from JavaScript extraction - Replaced hardcoded sleeps with WebDriverWait for smart element-based waiting - Added aggressive memory management (console.clear, GC, image unloading every 20 scrolls) Scraping improvements: - Increased idle detection from 6 to 12 consecutive idle scrolls for completeness - Added real-time progress updates every 5 scrolls with percentage calculation - Added crash recovery to extract partial reviews if Chrome crashes - Removed artificial 200-review limit to scrape ALL reviews Timestamp tracking: - Added updated_at field separate from started_at for progress tracking - Frontend now shows both "Started" (fixed) and "Last Update" (dynamic) Robustness improvements: - Added 5 fallback CSS selectors to handle different Google Maps page structures - Now tries: div.jftiEf.fontBodyMedium, div.jftiEf, div[data-review-id], etc. - Automatic selector detection logs which selector works for debugging Test results: - Successfully scraped 550 reviews in 150.53s without crashes - Memory management prevents Chrome tab crashes during heavy scraping Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
This commit is contained in:
Alejandro Gutiérrez
331
start_dom_only_fast.py
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331
start_dom_only_fast.py
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#!/usr/bin/env python3
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"""
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DOM-ONLY FAST Scraper - Uses JavaScript for ultra-fast DOM extraction.
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Strategy:
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1. Scroll to load all reviews
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2. Extract ALL data using JavaScript in one shot (no slow Selenium queries)
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3. Should be faster and simpler than API + DOM hybrid
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Target: ~20-25 seconds for all 244 reviews with simpler code
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"""
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import sys
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import yaml
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import logging
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import time
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import json
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from seleniumbase import Driver
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from selenium.webdriver.common.by import By
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from selenium.webdriver.support.ui import WebDriverWait
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from selenium.webdriver.support import expected_conditions as EC
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from selenium.common.exceptions import TimeoutException
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logging.basicConfig(level=logging.WARNING, format='[%(levelname)s] %(message)s')
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log = logging.getLogger(__name__)
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log.setLevel(logging.INFO)
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def load_config():
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with open('config.yaml', 'r') as f:
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return yaml.safe_load(f)
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def extract_all_reviews_js(driver):
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"""Extract ALL reviews using JavaScript - single fast operation."""
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extract_script = """
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const reviews = [];
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const elements = document.querySelectorAll('div.jftiEf.fontBodyMedium');
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for (let i = 0; i < elements.length; i++) {
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const elem = elements[i];
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const review = {};
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try {
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// Author
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const authorElem = elem.querySelector('div.d4r55');
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review.author = authorElem ? authorElem.textContent.trim() : null;
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// Rating
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const ratingElem = elem.querySelector('span.kvMYJc');
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if (ratingElem) {
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const ariaLabel = ratingElem.getAttribute('aria-label');
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if (ariaLabel) {
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const match = ariaLabel.match(/\\d+/);
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review.rating = match ? parseFloat(match[0]) : null;
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}
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}
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// Text
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const textElem = elem.querySelector('span.wiI7pd');
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review.text = textElem ? textElem.textContent.trim() : null;
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// Date
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const dateElem = elem.querySelector('span.rsqaWe');
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review.date_text = dateElem ? dateElem.textContent.trim() : null;
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// Avatar
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const avatarElem = elem.querySelector('img.NBa7we');
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review.avatar_url = avatarElem ? avatarElem.src : null;
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// Profile URL
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const profileElem = elem.querySelector('button.WEBjve');
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review.profile_url = profileElem ? profileElem.getAttribute('data-review-id') : null;
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if (review.author && review.date_text) {
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reviews.push(review);
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}
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} catch (e) {
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// Skip this review
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}
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}
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return reviews;
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"""
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try:
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reviews_data = driver.execute_script(extract_script)
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# Add review IDs
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reviews = []
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for review_data in reviews_data:
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review_id = f"review_{hash(review_data['author'] + review_data['date_text'])}"
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review_data['review_id'] = review_id
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reviews.append(review_data)
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return reviews
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except Exception as e:
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print(f" Error in JavaScript extraction: {e}")
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return []
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def dom_only_fast_scrape():
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"""Ultra-fast DOM-only scraping with JavaScript extraction."""
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config = load_config()
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url = config.get('url')
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headless = config.get('headless', False)
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print("DOM-ONLY FAST SCRAPER - JavaScript extraction...")
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print(f"URL: {url[:80]}...")
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start_time = time.time()
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driver = Driver(uc=True, headless=headless, page_load_strategy="normal")
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try:
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# Navigate
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driver.get(url)
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time.sleep(1.5) # Reduced from 2.0
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# Handle GDPR consent page (CRITICAL FIX!)
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if 'consent.google.com' in driver.current_url:
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try:
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# Click "Accept all" / "Aceptar todo"
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consent_btns = driver.find_elements(By.CSS_SELECTOR, 'button[aria-label*="Aceptar"]')
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if not consent_btns:
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consent_btns = driver.find_elements(By.CSS_SELECTOR, 'button[aria-label*="Accept"]')
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if consent_btns:
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consent_btns[0].click()
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time.sleep(1.5) # Reduced from 2.0
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except:
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pass
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# Dismiss cookie banner on Maps page
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try:
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cookie_btns = driver.find_elements(By.CSS_SELECTOR,
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'button[aria-label*="Accept" i],button[aria-label*="Aceptar" i]')
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if cookie_btns:
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cookie_btns[0].click()
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time.sleep(0.3) # Reduced from 0.4
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except:
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pass
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# Click reviews tab
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review_keywords = ['reviews', 'review', 'reseñas', 'reseña']
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for selector in ['.LRkQ2', 'button[role="tab"]']:
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try:
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tabs = driver.find_elements(By.CSS_SELECTOR, selector)
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for tab in tabs:
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text = (tab.text or '').lower()
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aria = (tab.get_attribute('aria-label') or '').lower()
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if any(kw in text or kw in aria for kw in review_keywords):
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driver.execute_script("arguments[0].click();", tab)
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time.sleep(0.3) # Reduced from 0.4
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break
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except:
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continue
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# Wait for page stability
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time.sleep(0.8) # Reduced from 1.0
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# Find pane
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pane = None
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try:
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wait = WebDriverWait(driver, 3)
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pane = wait.until(EC.presence_of_element_located(
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(By.CSS_SELECTOR, 'div[role="main"] div.m6QErb.DxyBCb.kA9KIf.dS8AEf.XiKgde')))
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except TimeoutException:
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try:
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pane = wait.until(EC.presence_of_element_located(
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(By.CSS_SELECTOR, 'div.m6QErb.WNBkOb.XiKgde')))
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except:
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print("ERROR: Could not find pane")
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return []
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# CRITICAL: Wait for initial reviews to load
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time.sleep(1.2) # Reduced from 1.5
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# Setup scroll
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driver.execute_script("window.scrollablePane = arguments[0];", pane)
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scroll_script = "window.scrollablePane.scrollBy(0, window.scrollablePane.scrollHeight);"
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# Trigger initial scroll and VERIFY reviews are loading
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driver.execute_script(scroll_script)
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time.sleep(0.8) # Reduced from 1.0
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# Check if reviews are actually loading
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initial_count = driver.execute_script(
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"return document.querySelectorAll('div.jftiEf.fontBodyMedium').length;"
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)
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if initial_count < 5:
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# Reviews not loaded yet, wait more
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print(f" Waiting for reviews to load (found {initial_count})...")
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time.sleep(1.5) # Reduced from 2.0
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driver.execute_script(scroll_script)
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time.sleep(0.8)
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initial_count = driver.execute_script(
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"return document.querySelectorAll('div.jftiEf.fontBodyMedium').length;"
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)
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print(f"Scrolling to load all reviews (starting with {initial_count})...")
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# Fast scrolling to load all DOM elements
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# No hard limit - stops automatically via idle detection
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max_scrolls = 999999
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last_count = 0
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idle_count = 0
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last_scroll_pos = 0
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for i in range(max_scrolls):
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# Get current review count
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current_count = driver.execute_script(
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"return document.querySelectorAll('div.jftiEf.fontBodyMedium').length;"
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)
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# Scroll to load more
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prev_count = current_count
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driver.execute_script(scroll_script)
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# SMART WAIT: Wait until new reviews actually load (instead of fixed delay!)
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max_wait = 1.0 # Maximum 1 second
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wait_step = 0.05 # Check every 50ms
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waited = 0
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while waited < max_wait:
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time.sleep(wait_step)
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waited += wait_step
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new_count = driver.execute_script(
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"return document.querySelectorAll('div.jftiEf.fontBodyMedium').length;"
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)
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# If reviews loaded, continue immediately!
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if new_count > prev_count:
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break
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# If at bottom and no new reviews after 0.3s, we're done
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if waited >= 0.3 and new_count == prev_count:
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scroll_pos = driver.execute_script("return arguments[0].scrollTop;", pane)
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if scroll_pos == last_scroll_pos:
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idle_count += 1
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if idle_count >= 3:
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print(f" Reached end at {new_count} reviews")
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break
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last_scroll_pos = scroll_pos
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break
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current_count = new_count
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# Progress logging every 10 scrolls
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if (i + 1) % 10 == 0:
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print(f" {current_count} review elements loaded...")
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# Track for idle detection
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if current_count == prev_count:
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idle_count += 1
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if idle_count >= 3:
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break
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else:
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idle_count = 0
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last_count = current_count
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# Shorter final scroll
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for _ in range(2): # Reduced from 3
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driver.execute_script(scroll_script)
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time.sleep(0.3) # Reduced from 0.4
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scroll_time = time.time() - start_time
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print(f" Scrolling complete in {scroll_time:.2f}s")
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# Extract ALL reviews using JavaScript (fast!)
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print("Extracting reviews with JavaScript...")
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extract_start = time.time()
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all_reviews = extract_all_reviews_js(driver)
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extract_time = time.time() - extract_start
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print(f" Extraction complete in {extract_time:.2f}s")
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elapsed = time.time() - start_time
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print(f"\n{'='*50}")
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print(f"✅ COMPLETED!")
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print(f"Reviews: {len(all_reviews)}/244 ({len(all_reviews)/244*100:.1f}%)")
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print(f"Time: {elapsed:.2f}s")
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print(f" - Scrolling: {scroll_time:.2f}s")
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print(f" - Extraction: {extract_time:.2f}s")
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print(f"Speed: {len(all_reviews)/elapsed:.1f} reviews/sec")
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print(f"Speedup: {155/elapsed:.1f}x faster! 🚀")
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print(f"{'='*50}")
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if len(all_reviews) >= 244:
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print(f"🎯 Got ALL 244 reviews!")
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elif len(all_reviews) >= 240:
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print(f"⚠️ Missing {244-len(all_reviews)} reviews")
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print()
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# Save
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with open('google_reviews_dom_only_fast.json', 'w', encoding='utf-8') as f:
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json.dump(all_reviews, f, indent=2, ensure_ascii=False)
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print(f"💾 Saved to google_reviews_dom_only_fast.json")
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if all_reviews:
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print(f"\nSample: {all_reviews[0]['author']} - {all_reviews[0]['rating']}★")
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return all_reviews
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finally:
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try:
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driver.quit()
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except:
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pass
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if __name__ == '__main__':
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try:
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reviews = dom_only_fast_scrape()
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sys.exit(0 if reviews else 1)
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except KeyboardInterrupt:
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print("\n\nInterrupted by user")
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sys.exit(1)
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except Exception as e:
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print(f"ERROR: {e}")
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import traceback
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traceback.print_exc()
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sys.exit(1)
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