بناء خادم بروكسي بسيط باستخدام Node.js

const http = require('http');
const net = require('net');
const url = require('url');

// إنشاء خادم HTTP
const server = http.createServer((clientReq, clientRes) => {
    const reqUrl = url.parse(clientReq.url);
    
    const options = {
        hostname: reqUrl.hostname,
        port: reqUrl.port || 80,
        path: reqUrl.path,
        method: clientReq.method,
        headers: clientReq.headers
    };

    // توجيه الطلب للخادم الهدف
    const proxyReq = http.request(options, (proxyRes) => {
        clientRes.writeHead(proxyRes.statusCode, proxyRes.headers);
        proxyRes.pipe(clientRes, { end: true });
    });

    clientReq.pipe(proxyReq, { end: true });

    proxyReq.on('error', (e) => {
        console.log(`Error: ${e.message}`);
        clientRes.end();
    });
});

// دعم HTTPS (CONNECT Method)
server.on('connect', (req, clientSocket, head) => {
    const { port, hostname } = url.parse(`//${req.url}`, false, true);
    
    const serverSocket = net.connect(port || 443, hostname, () => {
        clientSocket.write('HTTP/1.1 200 Connection Established\r\n' +
                        'Proxy-agent: Node.js-Proxy\r\n' +
                        '\r\n');
        serverSocket.write(head);
        serverSocket.pipe(clientSocket);
        clientSocket.pipe(serverSocket);
    });
});

server.listen(8080, () => {
    console.log('Proxy running on port 8080');
});