clean-css broken proxy testcase

breakcleancssonhttps.js

'use strict';

var CleanCSS = require( './' ),
    httpProxy = require( 'http-proxy' ),
    http = require( 'http' ),
    https = require( 'https' ),
    url = require( 'url' );

var proxy = httpProxy.createProxyServer();
var proxyServer = http.createServer((req, res) => {
  var get = (req.url.indexOf('http://') === 0) ? http.get : https.get;

  get(req.url,
    ( response ) => {

    response.on('data', c => res.write(c) );
    response.on('end', _ => res.end( ) );
  } );
});
proxyServer.listen(8080, _ => {
  var options = {
    inliner: {
      request: {
        hostname: '127.0.0.1',
        port: 8080
      }
    }
  };

  //socket hang up
  new CleanCSS(options).minify(
    '@import url(https://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic&subset=latin);a{color:red}',
    ( err, data ) => {

      console.log( err, data.styles );
  });

  //without https everything is fine
  new CleanCSS(options).minify(
    '@import url(http://fonts.googleapis.com/css?family=Lato:400,700,400italic,700italic&subset=latin);a{color:red}',
    ( err, data ) => {

      console.log( err, data.styles );
  });
});