minimalistic node http proxy

proxy.js

var http = require('http');
var url = require('url');
var path = require('path');
var request = require('request');

var ports = {
  "localhost": 3100,
  "dev.localhost": 3200
}

var proxyServer = http.createServer(proxy).listen(3000)

function proxy(req, res) {
  
  var fromUrl = 'http://' + req.headers.host
  var hostname = url.parse(fromUrl).hostname
  var uri = 'http://' + hostname + ':' + ports[hostname]
  request(uri).pipe(res)  
    
}