Function callback

public/javascripts/socket.io.js:5249–5263

(packet, index, total)

	  var self = this;
	  debug('polling got data %s', data);
	  var callback = function (packet, index, total) {
	    // if its the first message we consider the transport open
	    if ('opening' === self.readyState) {
	      self.onOpen();
	    }

	    // if its a close packet, we close the ongoing requests
	    if ('close' === packet.type) {
	      self.onClose();
	      return false;
	    }

	    // otherwise bypass onData and handle the message
	    self.onPacket(packet);
	  };

	  // decode payload
	  parser.decodePayload(data, this.socket.binaryType, callback);