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socialcalc/third-party/Socket.IO-node/support/socket.io-client/lib/transports/xhr.js  view on Meta::CPAN

        if (status == 200){
          self.checkSend();
        } else {
          self.onDisconnect();
        }
      }
    };
    this.sendXHR.send('data=' + encodeURIComponent(data));
  };
  
  /**
   * Disconnect the established connection.
   *
   * @returns {Transport}.
   * @api public
   */
  XHR.prototype.disconnect = function(){
    // send disconnection signal
    this.onDisconnect();
    return this;
  };
  
  /**
   * Handle the disconnect request.
   *
   * @api private
   */
  XHR.prototype.onDisconnect = function(){
    if (this.xhr){
      this.xhr.onreadystatechange = empty;
      try {
        this.xhr.abort();
      } catch(e){}
      this.xhr = null;
    }
    if (this.sendXHR){
      this.sendXHR.onreadystatechange = empty;
      try {
        this.sendXHR.abort();
      } catch(e){}
      this.sendXHR = null;
    }
    this.sendBuffer = [];
    io.Transport.prototype.onDisconnect.call(this);
  };
  
  /**
   * Generates a configured XHR request
   *
   * @param {String} url The url that needs to be requested.
   * @param {String} method The method the request should use.
   * @param {Boolean} multipart Do a multipart XHR request
   * @returns {XMLHttpRequest}
   * @api private
   */
  XHR.prototype.request = function(url, method, multipart){
    var req = request(this.base.isXDomain());
    if (multipart) req.multipart = true;
    req.open(method || 'GET', this.prepareUrl() + (url ? '/' + url : ''));
    if (method == 'POST' && 'setRequestHeader' in req){
      req.setRequestHeader('Content-type', 'application/x-www-form-urlencoded; charset=utf-8');
    }
    return req;
  };
  
  /**
   * Check if the XHR transports are supported
   *
   * @param {Boolean} xdomain Check if we support cross domain requests.
   * @returns {Boolean}
   * @api public
   */
  XHR.check = function(xdomain){
    try {
      if (request(xdomain)) return true;
    } catch(e){}
    return false;
  };
  
  /**
   * Check if the XHR transport supports corss domain requests.
   * 
   * @returns {Boolean}
   * @api public
   */
  XHR.xdomainCheck = function(){
    return XHR.check(true);
  };
  
  XHR.request = request;
  
})();