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: 
rc-web@69: /**
rc-web@69:  * Export the constructor.
rc-web@69:  */
rc-web@69: 
rc-web@69: exports = module.exports = XHRPolling;
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Ajax polling transport.
rc-web@69:  *
rc-web@69:  * @api public
rc-web@69:  */
rc-web@69: 
rc-web@69: function XHRPolling (mng, data, req) {
rc-web@69:   HTTPPolling.call(this, mng, data, req);
rc-web@69: };
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Inherits from Transport.
rc-web@69:  */
rc-web@69: 
rc-web@69: XHRPolling.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: XHRPolling.prototype.name = 'xhr-polling';
rc-web@69: 
rc-web@69: /**
rc-web@69:  * Frames data prior to write.
rc-web@69:  *
rc-web@69:  * @api private
rc-web@69:  */
rc-web@69: 
rc-web@69: XHRPolling.prototype.doWrite = function (data) {
rc-web@69:   HTTPPolling.prototype.doWrite.call(this);
rc-web@69: 
rc-web@69:   var origin = this.req.headers.origin
rc-web@69:     , headers = {
rc-web@69:           'Content-Type': 'text/plain; charset=UTF-8'
rc-web@69:         , 'Content-Length': data === undefined ? 0 : Buffer.byteLength(data)
rc-web@69:         , 'Connection': 'Keep-Alive'
rc-web@69:       };
rc-web@69: 
rc-web@69:   if (origin) {
rc-web@69:     // https://developer.mozilla.org/En/HTTP_Access_Control
rc-web@69:     headers['Access-Control-Allow-Origin'] = origin;
rc-web@69:     headers['Access-Control-Allow-Credentials'] = 'true';
rc-web@69:   }
rc-web@69: 
rc-web@69:   this.response.writeHead(200, headers);
rc-web@69:   this.response.write(data);
rc-web@69:   this.log.debug(this.name + ' writing', data);
rc-web@69: };