Node Proxy Server: Building a Man-in-the-Middle Proxy

What to do when data gets snagged? Try this old-fashioned way.

Have you ever encountered this situation: obviously the network is open, but certain websites can not be swiped? At this time, the old driver will pull out a secret weapon ---proxy serverThe first thing you need to do is to use Node.js as a proxy for your program. Today we will use Node.js hand rubbed a man-in-the-middle proxy, by the way, talk about how to use ipipgo proxy IP to make the program run more smoothly.

Proxy servers are just two-bit dealers

To put it bluntly, a proxy server is a middleman, which helps you forward network requests. For example, if you want to look at a certain web page, the ordinary process is to directly find the website to ask for data, but with the proxy becomes: you → proxy → website → proxy → you. This operation has two advantages:Hide the real addressrespond in singingBreaking Access RestrictionsThe

const http = require('http');
const { createProxyMiddleware } = require('http-proxy-middleware');

const proxy = createProxyMiddleware({
  target: 'http://目标网站:端口',
  changeOrigin: true
}); const proxy = createProxyMiddleware({ target: '', changeOrigin: true

http.createServer((req, res) => {
  proxy(req, res); }).listen(3000); {
}).listen(3000);

The above code is a simple proxy, run up to visit localhost:3000 can see the effect. However, this kind of naked proxy is easy to be recognized, this time you need to on theDynamic IP Pooling with ipipgoto take cover.

Putting a cloak of invisibility on the agent

Direct exposure of their own IP is the same as running naked on the Internet, the smart thing to do is to give the proxy set of multi-layer vest. Here we recommend ipipgo'sResidential Proxy IPThese IPs are the broadband addresses of real users and are less easily recognized than server room IPs.

The modified code looks like this:

const axios = require('axios');
const proxyList = await ipipgo.getProxies(); // Get the latest IP pool from ipipgo

function rotateProxy() {
  return proxyList[Math.floor(Math.random() proxyList.length)]; }
}

// Automatically switch IPs with each request
const rotatingProxy = createProxyMiddleware({
  target: 'http://目标网站',
  router: () => rotateProxy(),
  changeOrigin: true
});

A practical guide to avoiding the pit

Three major pitfalls commonly encountered by newbies:

1. Sudden IP failure → use ipipgoReal-Time Detection Interfacepre-filter
2. Requests too frequent → Setstochastic delay(0.5-3 seconds)
3. Identified agent characteristics → Periodic replacement of User-Agent header

QA time

Q: What about snail-like agent speeds?
A: Go with ipipgo'sDedicated bandwidth linesDon't use public proxy pools, and remember to set the connection timeout.

Q: How can I tell if a proxy is active?
A: Visit https://ip.ipipgo.com/checkip to see if the IP displayed is a proxy IP

Q: How can I handle multiple websites at the same time?
A: Use ipipgo'sMulti-geographic nodesFunctionality to assign IPs to different websites corresponding to regions

I'll tell you what's on my mind.

The biggest headache is to engage in proxy IP quality, before using several service providers, either IP survival time is short or slow response. Later, I switched to ipipgo.Commercial level agentsThe company supports pay-as-you-go, not to mention the fast response from their customer service when they encounter problems. Especially that intelligent routing function, can automatically match the fastest line, save a lot of debugging time.

A final reminder for newbies:Free agents are the pits.! If you are light, your data will be leaked, and if you are heavy, your account will be blocked. How about spending a little money with ipipgo authentication agent, both safe and worry. After all, we engage in technical time is the most valuable, there is no need to save a few cents to toss themselves.