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/**
* Module dependencies.
*/
var http = require('http');
/**
* Invoking the library as a function delegates to attach if the first argument
* is an `http.Server`.
*
* If there are no arguments or the first argument is an options object, then
* a new Server instance is returned.
*
* @param {http.Server} server (if specified, will be attached to by the new Server instance)
* @param {Object} options
* @return {Server} engine server
* @api public
*/
exports = module.exports = function () {
// backwards compatible use as `.attach`
// if first argument is an http server
if (arguments.length && arguments[0] instanceof http.Server) {
return attach.apply(this, arguments);
}
// if first argument is not an http server, then just make a regular eio server
return exports.Server.apply(null, arguments);
};
/**
* Protocol revision number.
*
* @api public
*/
exports.protocol = 1;
/**
* Expose Server constructor.
*
* @api public
*/
exports.Server = require('./server');
/**
* Expose Socket constructor.
*
* @api public
*/
exports.Socket = require('./socket');
/**
* Expose Transport constructor.
*
* @api public
*/
exports.Transport = require('./transport');
/**
* Expose mutable list of available transports.
*
* @api public
*/
exports.transports = require('./transports');
/**
* Exports parser.
*
* @api public
*/
exports.parser = require('engine.io-parser');
/**
* Creates an http.Server exclusively used for WS upgrades.
*
* @param {Number} port
* @param {Function} callback
* @param {Object} options
* @return {Server} websocket.io server
* @api public
*/
exports.listen = listen;
function listen (port, options, fn) {
if ('function' === typeof options) {
fn = options;
options = {};
}
var server = http.createServer(function (req, res) {
res.writeHead(501);
res.end('Not Implemented');
});
// create engine server
var engine = exports.attach(server, options);
engine.httpServer = server;
server.listen(port, fn);
return engine;
}
/**
* Captures upgrade requests for a http.Server.
*
* @param {http.Server} server
* @param {Object} options
* @return {Server} engine server
* @api public
*/
exports.attach = attach;
function attach (server, options) {
var engine = new exports.Server(options);
engine.attach(server, options);
return engine;
}