Node Proxy: Building an HTTP Proxy Server with Node.js

Hands-on with Node to get a proxy server!

Recently, a lot of friends doing data collection always ask me, is there any way to build a proxy server to switch IP, in fact, this thing with Node.js can be done in minutes. Today, let's talk about this, by the way, to give you a reliable proxy IP provider -ipipgoThe

Why do I need to build my own proxy server?

For example, you wrote a crawler script, but the target website blocked your IP. If you have a proxy server that can change IP at this time, it is like playing a game with resurrection armor on, and you can continue to work with a different IP. The advantages of building your own proxy server areHighly controllable, configure it however you want, it's much more flexible than an off-the-shelf tool.

How easy is it for Node.js to mess with proxies?

Prepare your node environment by installing ahttp-proxyThe module comes together. Look at this code:

const http = require('http');
const httpProxy = require('http-proxy');

const proxy = httpProxy.createProxyServer();
http.createServer((req, res) => {
    proxy.web(req, res, { target: 'http://目标网站:端口' }); }).
}).listen(your port number);

save as (a file)proxy.jsCommand Linenode proxy.jsStart, a basic proxy service is running. But this is just a bare-bones version, you really need to add a little more to the real thing.

Putting a bulletproof vest on a proxy server

Proxies directly exposed to the public network are dangerous and have to do three things:

It is recommended to add this authentication code:

const allowedIPs = ['192.168.1.', '10.0.0.'];
if(!allowedIPs.some(ip => req.ip.match(ip))) {
    return res.status(403).send('Go back where you came from');
}

How to choose a reliable proxy IP?

Maintaining an IP pool on your own is too much work.ipipgoof agency services. They have three treasures in their home:

1. Dynamic IP in 200+ cities nationwide
2. HTTP/HTTPS dual protocol support
3. Automatic IP rotation without duplication

The access method is also simple, add the authentication information in the configuration:

{
    target: 'http://目标网站',
    headers: {
        'Proxy-Authorization': 'Basic ' + Buffer.from('ipipgo account:password').toString('base64')
    }
}

Real-world common pitfalls QA

Q: What can I do about the frequent lagging of proxy servers?
A：Check if the quality of IP is not good, suggest to changeipipgoThe exclusive IP packages for immediate stability improvement

Q: What should I do if I encounter a back-crawling website?
A: Three great tips: 1. Randomize User-Agent 2. Set reasonable request intervals 3. Use theipipgoDynamic Residential IPs for higher camouflage

Q: How can I tell if a proxy is in effect?
A: Add a log print to the code, or just use thecurl -x proxy address destination URLbeta (software)

Upgrade Play Tips

For a more specialized proxy service, try these advanced configurations:

• expense or outlayload balancingAssessing the pressure of requests
• set upfail and try againMechanism (remember to change IP and retry)
• a joint (between components)ipipgoAPI for automatic IP replacement

As a final rant, while self-built proxy servers are flexible, maintaining IP quality is a real pain in the ass. Leave the professional work to the professionals and useipipgoIt's both hassle-free and reliable, and there's a free trial credit for new users, so doesn't it smell good?