node.js proxy to enforce HTTPS and remove cookies

gistfile1.js

var http = require('http');

var secure = new RegExp('(' + [
  'facebook.com',
  'twitter.com',
  'google.com'
].join('|').replace('.', '\\.') + ')$');

var noSecure = new RegExp('^(' + [
  'http://(www\.)?google\.com/(image|imghp)',
  'http://(translate|video|maps|scholar)\.google\.com/'
].join('|') + ')');


http.createServer(function(request, response) {
  var isSecure = secure.test(request.headers['host']);
  if (isSecure && !noSecure.test(request.url)) {
    response.writeHead(301, { 'Location': 'https' + request.url.substr(request.url.indexOf(':')) });
    response.end();
  }
  else {
    // Cookieless proxy; base from http://www.catonmat.net/http-proxy-in-nodejs
    if (isSecure && 'cookie' in request.headers) delete request.headers['cookie'];
    var proxy = http.createClient(80, request.headers['host']);
    var proxy_request = proxy.request(request.method, request.url, request.headers);
    proxy_request.on('response', function (proxy_response) {
      proxy_response.on('data', function(chunk) {
        response.write(chunk, 'binary');
      });
      proxy_response.on('end', function() {
        response.end();
      });
      if (isSecure && 'set-cookie' in proxy_response.headers) delete proxy_response.headers['set-cookie'];
      response.writeHead(proxy_response.statusCode, proxy_response.headers);
    });
    request.on('data', function(chunk) {
      proxy_request.write(chunk, 'binary');
    });
    request.on('end', function() {
      proxy_request.end();
    });
  }
}).listen(8080);

Note that a pac file which only lists the relevant domains/websites is probably a better approach since node.js doesn't do pipelining of HTTP requests.