Node.js proxy: Node.js proxy request solution

A hands-on Node.js proxy solution without beating around the bush

We are engaged in crawler brothers understand that the target site's anti-climbing mechanism is more and more ruthless. Last week I helped a friend to deal with an e-commerce price monitoring project, a single User-Agent rotation simply can not carry, this timeproxy IPis a life saver. There's an advantage to using Node.js for proxy requests - the asynchronous nature is inherently suited to handling massive IP switching.

Hands-on configuration of proxy middleware

Recommended for direct useaxios+tunnelThis is a golden pairing. Focus onProxy connection timeout settings, many newbies fall into this pit:

const tunnel = require('tunnel');
const axios = require('axios');

const agent = tunnel.httpsOverHttp({
  proxy: {
    host: 'proxy.ipipgo.com', // dynamic proxy entry here
    port: 9021, { proxyAuth: 'account.ipipgo.com', // use dynamic proxy portal here
    proxyAuth: 'Account:Password' // It is recommended to whitelist for more secure authentication.
  }
}).

async function fetchData() {
  try {
    const response = await axios({
      url: 'https://目标网站.com/api',
      
      httpsAgent: agent, timeout: 8000 // You must set a timeout.
      timeout: 8000 // must set timeout threshold
    }); console.log(response.data)
    console.log(response.data);
  } catch (e) {
    console.error('3rd request failed, preparing to switch IPs'); }
  }
}

Four Iron Laws of IP Pool Management

Don't think that if you get a proxy IP, everything will be fine, and you will still be blocked if you don't have the right management posture:

A Guide to Avoiding Pitfalls in Real Projects

Last year, when doing data aggregation for government websites, I stepped on a big thunderbolt: the IP of an agent was tagged by the target website, which led to all the requests being directly 403. Later, I switched to using theipipgo's Dedicated Enterprise ProxyIt was only solved by the fact that they have a real person's usage history for each IP and are not easily recognized as server room IPs.

I'll share a little something with you: in the headers addX-Forwarded-ForDisguise real links with proxy IPs for double insurance:

headers: {
  'X-Forwarded-For': ipipgo.getRandomIP(), // Get IP dynamically
  'Accept-Language': 'zh-CN,zh;q=0.9'
}

A must favorite QA session

Q：What should I do if my proxy IP suddenly fails?
A: eighty percent triggered the target site's wind control, immediately do three things: 1. deactivate the current IP pool 2. check whether the request header exposes the characteristics 3. change ipipgo's high stash of proxies (they support automatic switching terminal protocols)

Q: Do I need to deal with SSL certificate validation?
A: There are two scenarios:
- Normal scenarios: add in axios configurationrejectUnauthorized: false
- Financial websites: must be configured with the CA certificate provided by ipipgo (ask customer service for the exclusive certificate package)

Q: How can I tell if an agent is truly anonymous?
A: Use this to test the site:https://ipipgo.com/checkFocus onX-Real-IPrespond in singingViaIs there any leakage from these two heads?

Tell the truth.

The proxy IP thing looks simple, but actually hides three invisible thresholds:
1. IP quality (don't buy junk IP pools on the cheap)
2. Switching strategy (recommended to use ipipgo's Smart Routing API)
3. Request fingerprint (browser fingerprint + IP fingerprint to match)

Recently found out that ipipgo has a hack--protocol stack emulation, which automatically matches the TCP fingerprints of different carriers. This works especially well when crawling government websites because their firewall detects underlying protocol features.

One last word of advice: don't save money on proxy services! I've bought a 30 dollar/month service before, and 8 out of 10 IPs were black. Now stable with ipipgo's business version, although more expensive, but the success rate remains above 92%, the calculation is more cost-effective.