Web Scraping 101: What Every Developer Should Know
Before you write your first scraper, here's what you need to know.
The Three Hard Problems
1. JavaScript Rendering
Modern websites are SPAs. curl and requests won't get you the real content.
Solution: Use a headless browser or an API that handles JS rendering automatically.
2. Anti-Bot Protection
Cloudflare, DataDome, PerimeterX — these actively block scrapers. You need:
- Residential proxy rotation
- Browser fingerprint spoofing
- CAPTCHA solving
3. Rate Limiting
Scrape too fast? You get blocked. Too slow? Takes forever.
Tools Compared
| Tool | JS Rendering | Proxies | Cost | Learning Curve |
|---|---|---|---|---|
| Puppeteer | ✅ Built-in | ❌ Manual | Free | Medium |
| Playwright | ✅ Built-in | ❌ Manual | Free | Medium |
| Scrapy | ❌ (needs splash) | ❌ Manual | Free | High |
| XCrawl API | ✅ Auto | ✅ Auto | $$ | Low |
My Advice
Start with a simple API. If a page gives you the HTML, use cheerio. If it blocks you, upgrade to an API that handles the hard parts. Don't build your own proxy infrastructure — it's not worth the time.
Built with XCrawl API
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