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