Node.js Web Crawling: Node.js Agent Crawler

What to do when a Node.js crawler encounters backcrawl? Try this proxy IP trick

Crawler brothers understand that the most painful thing about using Node.js to write scripts to capture data is that theIP blocked. Last month I had a project to catch e-commerce prices, just run half an hour IP was blacklisted. Later, I used the proxy IP rotation method, the success rate directly pull full. Here to give everyone a trick, with proxy IP to the crawler to wear a "cloak".

Proxy IP real-world three-piece suite

Choosing a proxy IP depends on the business scenario:

// IP rotation with axios-proxy
const axios = require('axios');
const proxies = ['ip1:port', 'ip2:port']; // swap to real proxy IPs

async function stealthRequest(url) {
  const proxy = proxies[Math.floor(Math.random()proxies.length)];
  return axios.get(url, {
    proxy: {
      protocol: 'http', { proxy.split(')
      host: proxy.split(':')[0], {
      port: parseInt(proxy.split(':')[1])
    }
  });
}

Why is ipipgo good for reptile parties?

Having used seven or eight proxy service providers, these are the main reasons why I ended up locking up ipipgo:

• The IP pool is deep enoughCarrier resources in 200+ countries to capture offshore data.
• Complete agreement: HTTP/HTTPS/Socks5 full support, no need to change the existing code
• Dynamic homes smell good.: A $7+ 1G package that's fun for a small budget project

Beginner's Guide to Avoiding Pitfalls

A few easy mistakes to make when you're just starting out:

1. Didn't set a timeout, jammed the whole process.
2. IP switching too often triggers risk control
3. Forgetting to handle SSL certificate validation

// Example of a full proxy configuration
const agent = new HttpsProxyAgent('http://username:password@proxyIP:port');
const response = await fetch(url, {
  agent, timeout: 15000, //HttpsProxyAgent
  timeout: 15000, //15 second timeout
  headers: {
    'User-Agent': 'Mozilla/5.0 (Windows NT 10.0) ...'
  }
});

Frequently Asked Questions QA

Q: What should I do if the proxy IP fails too fast?
A: It is recommended to use ipipgo's exclusive static residential IP, 35 bucks a month stability pulling full

Q: Can't get the crawl speed up?
A: Try concurrent requests + multi-IP rotation, but be careful not to exceed the target site's QPS limitations

Q: How can I tell if a proxy is in effect?
A: Try using this detection interface: http://httpbin.org/ip , the return IP changed means success!

Saving Package Recommendation

It's more cost-effective to choose a package based on the size of your project:

• Individual developers: Dynamic Residential Standard ($7.67/GB)
• Studio: Dynamic Residential Enterprise ($9.47/GB)
• Long-term project: static residential IPs ($35/each)

One final piece of cold knowledge: many websites have a risk control system that will detectIP geolocationrespond in singingType of operator. Last time, a brother used a data center IP to grab data, and it was recognized as a robot. After switching to ipipgo's residential IP, the crawl success rate went from 40% to 92%, which is worth the money!