Bare bones NodeJs url proxy

proxy-url.js

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

function notFound(res) {
  res.writeHead(404, "text/plain");
  res.end("404: File not found");
}

http.createServer(function(b_req, b_res){
  var b_url = url.parse(b_req.url, true);
  if(!b_url.query || !b_url.query.url) return notFound(b_res);

  var p_url = url.parse(b_url.query.url);

  var p_client = http.request({
    method: 'GET',
    path: p_url.pathname || '/',
    port: 80,
    host: p_url.hostname
  },function(res){
    b_res.writeHead(res.statusCode, res.headers);
    res.on('data', function (chunk) {
      b_res.write(chunk);
    });
    res.on('end', function (chunk) {
      b_res.end();
    });
  });
  p_client.end();

}).listen(3000, "127.0.0.1");

sys.puts("Server running at http://127.0.0.1:3000");