http proxy

http-proxy.js

"use strict";

let http = require("http");
let url = require("url");

let server = http.createServer();

server.on("request", function (req, res) {
    let headers = {};
    for (const key of Object.keys(req.headers)) {
        let val = req.headers[key];
        if (key.indexOf("proxy-") != 0) {
            headers[key] = val;
        }
    }
    let method = req.method;
    let httpVersion = req.httpVersion;
    let path = url.parse(req.url).path;
    let host = headers.host.split(":");
    let remoteReq = http.request({
        hostname: host[0],
        port: host[1] || 80,
        path: path,
        method: method,
        headers: headers
    });
    remoteReq.on("response", function (remoteRes) {
        let statusCode = remoteRes.statusCode;
        let statusMessage = remoteRes.statusMessage;
        let headers = remoteRes.headers;
        res.writeHead(statusCode, statusMessage, headers);
        remoteRes.pipe(res);
    });
    req.pipe(remoteReq);
    req.on("end", function () {
        remoteReq.end();
    });
});
server.on("listening", function () {
    let address = server.address();
    console.log(`opened server on ${address.family == "IPv6" ? `[${address.address}]` : address.address}:${address.port} listening...`);
});

server.listen(8888);