Giving node-http-proxy a try

proxy.js

var http = require("http"),
    url = require("url");


var server = http.createServer(function (req, res) {
    console.log("connection count:" + server.connections);
    var fwd_url = url.parse(req.url),
        fwd_req_opts = {
            agent: false,
            host: fwd_url.hostname,
            port: fwd_url.port || 80,
            path: fwd_url.pathname + (fwd_url.search || ""),
            headers: req.headers,
            method: req.method,
        },
        fwd_req = http.request(fwd_req_opts, function (fwd_res) {

            //console.log("req", req.url);
            res.writeHead(fwd_res.statusCode, fwd_res.headers);

            fwd_res.on("data", function (chunk) {
                res.write(chunk);
            });
            fwd_res.on("end", function () {
                //console.log("end", req.url);
                res.end();
            });
        });

    req.on("data", function (chunk) {
        fwd_req.write(chunk);
    });
    req.on("end", function () {
        fwd_req.end();
    });
});

server.listen(9000);

with-nodejitsu.js

var http = require('http'),
    httpProxy = require('http-proxy'),
    url = require("url");
  
httpProxy.createServer(function (req, res, proxy) {
    var req_url = url.parse(req.url);
    proxy.proxyRequest(req, res, {
            host: req_url.hostname,
            port: req_url.port
        });
    console.log(req.url);
}).listen(9000);