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/*!
* socket.io-node
* Copyright(c) 2011 LearnBoost <dev@learnboost.com>
* MIT Licensed
*/
/**
* Module requirements.
*/
var Transport = require('../transport')
, parser = require('../parser')
, qs = require('querystring');
/**
* Export the constructor.
*/
exports = module.exports = HTTPTransport;
/**
* HTTP interface constructor. For all non-websocket transports.
*
* @api public
*/
function HTTPTransport (mng, data, req) {
Transport.call(this, mng, data, req);
};
/**
* Inherits from Transport.
*/
HTTPTransport.prototype.__proto__ = Transport.prototype;
/**
* Handles a request.
*
* @api private
*/
HTTPTransport.prototype.handleRequest = function (req) {
// Always set the response in case an error is returned to the client
this.response = req.res;
if (req.method == 'POST') {
var buffer = ''
, res = req.res
, origin = req.headers.origin
, headers = { 'Content-Length': 1, 'Content-Type': 'text/plain; charset=UTF-8' }
, self = this;
req.on('data', function (data) {
buffer += data;
if (Buffer.byteLength(buffer) >= self.manager.get('destroy buffer size')) {
buffer = '';
req.connection.destroy();
}
});
req.on('end', function () {
res.writeHead(200, headers);
res.end('1');
self.onData(self.postEncoded ? qs.parse(buffer).d : buffer);
});
// prevent memory leaks for uncompleted requests
req.on('close', function () {
buffer = '';
self.onClose();
});
if (origin) {
// https://developer.mozilla.org/En/HTTP_Access_Control
headers['Access-Control-Allow-Origin'] = origin;
headers['Access-Control-Allow-Credentials'] = 'true';
headers['X-XSS-Protection'] = '0';
}
} else {
Transport.prototype.handleRequest.call(this, req);
}
};
/**
* Handles data payload.
*
* @api private
*/
HTTPTransport.prototype.onData = function (data) {
var messages = parser.decodePayload(data);
this.log.debug(this.name + ' received data packet', data);
for (var i = 0, l = messages.length; i < l; i++) {
this.onMessage(messages[i]);
}
};
/**
* Closes the request-response cycle
*
* @api private
*/
HTTPTransport.prototype.doClose = function () {
this.response.end();
};
/**
* Writes a payload of messages
*
* @api private
*/
HTTPTransport.prototype.payload = function (msgs) {
this.write(parser.encodePayload(msgs));
};
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