Fast, simple, extensible Node.JS direct proxy.

proxy.coffee

http = require 'http'
util = require 'util'
url  = require 'url'

server = http.createServer (req, res) ->

  request = url.parse req.url
  request.headers = req.headers
  request.method = req.method

  oreq = http.request request, (ores) ->
    res.writeHead ores.statusCode, ores.headers
    ores.pipe res
  oreq.on 'error', (err) ->
    res.statusCode = 503
    res.end util.inspect(err)+'\n'
  req.pipe oreq

server.listen 8080, '127.0.0.1', ->
  console.log 'Proxy server running on 127.0.0.1 at port 8080'

proxy.js

var http = require('http')
  , util = require('util')
  , url  = require('url');

http.createServer(function (req, res) {

  var request = url.parse(req.url);
  request.headers = req.headers;
  request.method = req.method;

  var oreq = http.request(request, function (ores) {
    res.writeHead(ores.statusCode, ores.headers);
    ores.pipe(res);
  }).on('error', function (err) {
    res.statusCode = 503;
    res.end(util.inspect(err)+'\n');
  });
  req.pipe(oreq);

}).listen(8080, '127.0.0.1', function () {
  console.log('Proxy server running on 127.0.0.1 at port 8080');
});