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/*!
* socket.io-node
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
/**
* Module requirements.
*/
var HTTPPolling = require('./http-polling');
/**
* Export the constructor.
*/
exports = module.exports = XHRPolling;
/**
* Ajax polling transport.
*
* @api public
*/
function XHRPolling (mng, data, req) {
HTTPPolling.call(this, mng, data, req);
};
/**
* Inherits from Transport.
*/
XHRPolling.prototype.__proto__ = HTTPPolling.prototype;
/**
* Transport name
*
* @api public
*/
XHRPolling.prototype.name = 'xhr-polling';
/**
* Frames data prior to write.
*
* @api private
*/
XHRPolling.prototype.doWrite = function (data) {
HTTPPolling.prototype.doWrite.call(this);
var origin = this.req.headers.origin
, headers = {
'Content-Type': 'text/plain; charset=UTF-8'
, 'Content-Length': data === undefined ? 0 : Buffer.byteLength(data)
, 'Connection': 'Keep-Alive'
};
if (origin) {
// https://developer.mozilla.org/En/HTTP_Access_Control
headers['Access-Control-Allow-Origin'] = origin;
headers['Access-Control-Allow-Credentials'] = 'true';
}
this.response.writeHead(200, headers);
this.response.write(data);
this.log.debug(this.name + ' writing', data);
};
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