rc-web@69: 
rc-web@69: /*!
rc-web@69:  * socket.io-node
rc-web@69:  * Copyright(c) 2011 LearnBoost <dev@learnboost.com>
rc-web@69:  * MIT Licensed
rc-web@69:  */
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Module requirements.
rc-web@69:  */
rc-web@69: 
rc-web@69: var HTTPPolling = require('./http-polling');
rc-web@69: var jsonpolling_re = /^\d+$/
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Export the constructor.
rc-web@69:  */
rc-web@69: 
rc-web@69: exports = module.exports = JSONPPolling;
rc-web@69: 
rc-web@69: /**
rc-web@69:  * JSON-P polling transport.
rc-web@69:  *
rc-web@69:  * @api public
rc-web@69:  */
rc-web@69: 
rc-web@69: function JSONPPolling (mng, data, req) {
rc-web@69:   HTTPPolling.call(this, mng, data, req);
rc-web@69: 
rc-web@69:   this.head = 'io.j[0](';
rc-web@69:   this.foot = ');';
rc-web@69: 
rc-web@69:   if (data.query.i && jsonpolling_re.test(data.query.i)) {
rc-web@69:     this.head = 'io.j[' + data.query.i + '](';
rc-web@69:   }
rc-web@69: };
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Inherits from Transport.
rc-web@69:  */
rc-web@69: 
rc-web@69: JSONPPolling.prototype.__proto__ = HTTPPolling.prototype;
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Transport name
rc-web@69:  *
rc-web@69:  * @api public
rc-web@69:  */
rc-web@69: 
rc-web@69: JSONPPolling.prototype.name = 'jsonppolling';
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Make sure POST are decoded.
rc-web@69:  */
rc-web@69: 
rc-web@69: JSONPPolling.prototype.postEncoded = true;
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Handles incoming data.
rc-web@69:  * Due to a bug in \n handling by browsers, we expect a JSONified string.
rc-web@69:  *
rc-web@69:  * @api private
rc-web@69:  */
rc-web@69: 
rc-web@69: JSONPPolling.prototype.onData = function (data) {
rc-web@69:   try {
rc-web@69:     data = JSON.parse(data);
rc-web@69:   } catch (e) {
rc-web@69:     this.error('parse', 'reconnect');
rc-web@69:     return;
rc-web@69:   }
rc-web@69: 
rc-web@69:   HTTPPolling.prototype.onData.call(this, data);
rc-web@69: };
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Performs the write.
rc-web@69:  *
rc-web@69:  * @api private
rc-web@69:  */
rc-web@69: 
rc-web@69: JSONPPolling.prototype.doWrite = function (data) {
rc-web@69:   HTTPPolling.prototype.doWrite.call(this);
rc-web@69: 
rc-web@69:   var data = data === undefined
rc-web@69:       ? '' : this.head + JSON.stringify(data) + this.foot;
rc-web@69: 
rc-web@69:   this.response.writeHead(200, {
rc-web@69:       'Content-Type': 'text/javascript; charset=UTF-8'
rc-web@69:     , 'Content-Length': Buffer.byteLength(data)
rc-web@69:     , 'Connection': 'Keep-Alive'
rc-web@69:     , 'X-XSS-Protection': '0'
rc-web@69:   });
rc-web@69: 
rc-web@69:   this.response.write(data);
rc-web@69:   this.log.debug(this.name + ' writing', data);
rc-web@69: };