nodejs proxy for http

proxy.js

#!/usr/bin/env node
var http = require('http');

var config = { 
    port : 9091,
    targetHost: "localhost",
    targetPort: 8080
};

http.createServer(function(req, res) {
    var url = req.url;
    if (url.indexOf("/proxy") > 0) {
        var newurl = url.replace("/proxy", "", "i");

        var options = { 
            host: config.targetHost,
            port: config.targetPort,
            method: req.method,
            path: newurl,
            headers: req.headers
        };  

        var proxyReq = http.request(options, function(proxyRes) {
            console.log("StatusCode " + proxyRes.statusCode + ": pipe");
            res.writeHead(proxyRes.statusCode);
            if (proxyRes.statusCode == 401) {
                delete proxyRes.headers["www-authenticate"];
            }   
            proxyRes.pipe(res);
        }); 
        req.pipe(proxyReq);
        proxyReq.end();
    } else {
        res.writeHead(400); // Bad Request
        res.end();
    }   
}).listen(config.port);
console.log("Proxy Server started");