text: /**
   * Module dependencies.
   */
  
  var Polling = require('./polling');
  var qs = require('querystring');
  var rDoubleSlashes = /\\\\n/g;
  var rSlashes = /(\\)?\\n/g;
  var util = require('util');
  
  /**
   * Module exports.
   */
  
  module.exports = JSONP;
  
  /**
   * JSON-P polling transport.
   *
   * @api public
   */
  
  function JSONP(req) {
      Polling.call(this, req);
  
      this.head = '___eio[' + (req._query.j || '').replace(/[^0-9]/g, '') + '](';
      this.foot = ');';
  }
  
  /**
   * Inherits from Polling.
   */
  
  util.inherits(JSONP, Polling);
  
  /**
   * Handles incoming data.
   * Due to a bug in \n handling by browsers, we expect a escaped string.
   *
   * @api private
   */
  
  JSONP.prototype.onData = function (data) {
      // we leverage the qs module so that we get built-in DoS protection
      // and the fast alternative to decodeURIComponent
      data = qs.parse(data).d;
      if ('string' === typeof data) {
          // client will send already escaped newlines as \\\\n and newlines as \\n
          // \\n must be replaced with \n and \\\\n with \\n
          data = data.replace(rSlashes, function (match, slashes) {
              return slashes ? match : '\n';
          });
          Polling.prototype.onData.call(this, data.replace(rDoubleSlashes, '\\n'));
      }
  };
  
  /**
   * Performs the write.
   *
   * @api private
   */
  
  JSONP.prototype.doWrite = function (data, options, callback) {
      // we must output valid javascript, not valid json
      // see: http://timelessrepo.com/json-isnt-a-javascript-subset
      var js = JSON.stringify(data)
          .replace(/\u2028/g, '\\u2028')
          .replace(/\u2029/g, '\\u2029');
  
      // prepare response
      data = this.head + js + this.foot;
  
      Polling.prototype.doWrite.call(this, data, options, callback);
  };
  