70 lines
1.2 KiB
JavaScript
70 lines
1.2 KiB
JavaScript
|
|
/*!
|
|
* 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);
|
|
};
|