gistfile1.txt

var http = require('http'),
    URL = require('url'),
    jsdom = require('jsdom');

module.exports = function sqrape(url, callback) {
  if (!callback) throw new Error('Callback is not specified'); 
  if (!url) return callback(new Error('URL is not specified'));

  var parsedUrl = URL.parse(url);
  var options = {
    host: parsedUrl.hostname,
    port: parsedUrl.port,
    path: parsedUrl.pathname + (parsedUrl.search || '')
  };

  http.get(options, function(res) {
    if ([301, 302, 303, 307].indexOf(res.statusCode) !== -1) {
      if (res.headers["location"]) {
        var redirect = URL.resolve(URL.format(parsedUrl), res.headers["location"]);
        process.nextTick(function() {
          sqrape(redirect, callback);
        });
        return;
      }
    }
    if (res.statusCode !== 200) return callback(new Error('URL: ' + url + ', StatusCode: ' + res.statusCode), null);
    var buf = '';
    res.setEncoding('utf8');

    res.on('data', function(chunk) {
      buf += chunk;
    });

    res.on('end', function() {
      jsdom.env(buf, ['http://code.jquery.com/jquery.min.js'], function(err, window) {
        if (err) return callback(err, null);
        callback(null, window.jQuery);
      });
    });

    res.on('error', function(err) {
      callback(err, null);
    });
  }).on('error', function(err) {
    callback(err, null);
  });
};