code: function requestGET(url, callback) {
    request.get({url: url, encoding: null}, function (err, res, body) {
      if (err) {
        callback(err);
        return;
      }
      if (res.statusCode !== 200) {
        callback(res.statusCode);
        return;
      }
  
      var regex = /(?:charset|encoding)\s*=\s*['"]? *([\w\-]+)/i;
      var encoding = regex.exec(res.headers['content-type'])[1];
  
      var $ = cheerio.load(iconv.decode(new Buffer(body), encoding));
  
      callback(null, $);
    });
  }
docs: Private