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openshift.js
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openshift.js
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#!/bin/env node
// OpenShift sample Node application
var express = require( 'express' )
, http = require( 'http' )
, sio = require( 'socket.io' )
, fs = require( 'fs' );
/**
* Define the sample application.
*/
var SampleApp = function() {
// Scope.
var self = this;
/* ================================================================ */
/* Helper functions. */
/* ================================================================ */
/**
* Set up server IP address and port # using env variables/defaults.
*/
self.setupVariables = function() {
// Set the environment variables we need.
self.ipaddress = process.env.OPENSHIFT_NODEJS_IP || '127.0.0.1';
self.port = process.env.OPENSHIFT_NODEJS_PORT || 8080;
self.conn_user = [];
self.msgs = [];
self.sendrates = [];
self.srps = [];
if (typeof self.ipaddress === "undefined") {
// Log errors on OpenShift but continue w/ 127.0.0.1 - this
// allows us to run/test the app locally.
console.warn('No OPENSHIFT_NODEJS_IP var, using 127.0.0.1');
self.ipaddress = "127.0.0.1";
};
};
/**
* Populate the cache.
*/
self.populateCache = function() {
if (typeof self.zcache === "undefined") {
self.zcache = { 'index.html': '' };
}
// Local cache for static content.
self.zcache['index.html'] = fs.readFileSync('./index.html');
};
/**
* Retrieve entry (content) from cache.
* @param {string} key Key identifying content to retrieve from cache.
*/
self.cache_get = function(key) { return self.zcache[key]; };
/**
* terminator === the termination handler
* Terminate server on receipt of the specified signal.
* @param {string} sig Signal to terminate on.
*/
self.terminator = function(sig){
if (typeof sig === "string") {
console.log('%s: Received %s - terminating sample app ...',
Date(Date.now()), sig);
process.exit(1);
}
console.log('%s: Node server stopped.', Date(Date.now()) );
};
/**
* Setup termination handlers (for exit and a list of signals).
*/
self.setupTerminationHandlers = function(){
// Process on exit and signals.
process.on('exit', function() { self.terminator(); });
// Removed 'SIGPIPE' from the list - bugz 852598.
['SIGHUP', 'SIGINT', 'SIGQUIT', 'SIGILL', 'SIGTRAP', 'SIGABRT',
'SIGBUS', 'SIGFPE', 'SIGUSR1', 'SIGSEGV', 'SIGUSR2', 'SIGTERM'
].forEach(function(element, index, array) {
process.on(element, function() { self.terminator(element); });
});
};
/* ================================================================ */
/* App server functions (main app logic here). */
/* ================================================================ */
/**
* Create the routing table entries + handlers for the application.
*/
self.createRoutes = function() {
self.routes = { };
// Routes for /health, /asciimo and /
self.routes['/health'] = function(req, res) {
res.send('1');
};
self.routes['/asciimo'] = function(req, res) {
var link = "http://i.imgur.com/kmbjB.png";
res.send("<html><body><img src='" + link + "'></body></html>");
};
self.routes['/'] = function(req, res) {
res.setHeader('Content-Type', 'text/html');
res.send(self.cache_get('index.html') );
};
};
/**
* Initialize the server (express) and create the routes and register
* the handlers.
*/
self.initializeServer = function() {
// self.createRoutes();
// self.app = express.createServer();
self.app = express( );
self.server = http.createServer( self.app );
self.io = sio.listen( self.server );
// Add handlers for the app (from the routes).
// for (var r in self.routes) {
// self.app.get(r, self.routes[r]);
// }
};
/**
* Initializes the sample application.
*/
self.initialize = function() {
self.setupVariables();
//self.populateCache();
self.setupTerminationHandlers();
// Create the express server and routes.
self.initializeServer();
};
/**
* Start the server (starts up the sample application).
*/
self.start = function() {
// // Start the app on the specific interface (and port).
// self.app.listen(self.port, self.ipaddress, function() {
// console.log('%s: Node server started on %s:%d ...',
// Date(Date.now() ), self.ipaddress, self.port);
// });
// connect through http
self.server.listen( self.port, self.ipaddress );
console.log('%s: Node server started on %s:%d ...', Date(Date.now() ), self.ipaddress, self.port);
self.app.use( '/', express.static( __dirname + "/" ) );
self.app.get( '/', function ( req, res ) {
res.sendfile( __dirname + '/index.html' );
});
self.app.post( '/', function ( req, res ){
res.sendfile( __dirname + '/index.html' );
});
self.io.configure( function ( ) {
// io.set( 'transports', [ 'flashsocket', 'xhr-polling', 'websocket' ] );
// Restrict log output
self.io.set("log level", 2);
});
// get sending rates
function getSendingRate( ) {
var text = '';
for( item in self.conn_user ) {
text += ',' + self.conn_user[ item ] + '->' + self.srps[ item ];
}
return text;
}
function getSRatePerSec( ) {
for( item in self.conn_user ) {
self.srps[ item ] = self.sendrates[ item ];
self.sendrates[ item ] = 0;
}
}
setInterval( getSRatePerSec, 1000);
// Operation when a user is connected
self.io.sockets.on( 'connection', function ( socket ) {
var user = '';
// message pool for players
socket.on( 'message', function ( from, msg ) {
msg.action = lzw_decode( msg.action );
// io.sockets.emit( 'retrieve', { msg: user + ":add:" + user + "\n\n" } );
SendToAll( user + ":add:" + user + "\n\n" );
if( from == 'all' ) {
SendToAll( user + ":" + msg.action + "\n\n" );
// io.sockets.emit('retrieve', { msg: user + ":" + msg.action + "\n\n" } );
} else if( from == 'them' ) {
SendToThem( user + ":" + msg.action + "\n\n" );
// socket.broadcast.emit('retrieve', { msg: user + ":" + msg.action + "\n\n" } );
} else if( from == 'self' || from == '' ) {
SendToSelf( user + ":" + msg.action + "\n\n" );
// socket.emit('retrieve', { msg: user + ":" + msg.action + "\n\n" } );
} else {
SendToTarget( user + ":" + msg.action + "\n\n", from );
// socket.emit('retrieve', from, { msg: user + ":" + msg.action + "\n\n" } );
}
// SendToAll( user + ":" + 'msg: ' + getSendingRate( ) + "\n\n" );
self.sendrates[ user ]++;
});
socket.on( 'retrieve', function( ) {
self.sendrates[ user ]++;
getMsgs( user );
});
// Add players
socket.on( 'logon', function( data ) {
user = data.name;
self.conn_user[ user ] = data.name;
self.sendrates[ user ] = 0;
socket.emit( 'logon', { un: user } );
socket.set( 'username', user, function () {
self.io.sockets.emit( 'scores', { score: getUsers( ) } );
socket.emit( 'message', { msg: 'msg: Welcome ' + user + '! ' } );
socket.broadcast.emit( 'message', { msg: 'msg: User is connected: ' + user + '.' } );
});
SendToAll( user + ":add:" + user + "\n\n" );
console.log( getUsers( ) );
});
// Remove player from connected list
socket.on( 'disconnect', function( ) {
socket.get( 'username', function ( err, name ) {
delete self.conn_user[ name ];
self.io.sockets.emit( 'scores', { score: getUsers( ) } );
socket.broadcast.emit('message', { msg: 'msg: User is disconnected ' + name + '.' } );
});
});
function getUsers( ) {
var text = '';
for( item in self.conn_user ) {
text += ',' + self.conn_user[ item ];
}
return text;
}
function SendToAll( data ) {
for( item in self.conn_user ) {
self.msgs[ item ] += data;
}
}
function SendToThem( data ) {
for( item in self.conn_user ) {
if( user != item ) {
self.msgs[ item ] += data;
}
}
}
function SendToSelf( data ) {
self.msgs[ user ] += data;
}
function SendToTarget( data, target ) {
self.msgs[ target ] += data;
}
function getMsgs( user ) {
if( self.msgs[ user ] == '' ) return;
socket.emit('retrieve', { msg: self.msgs[ user ] } );
self.msgs[ user ] = '';
}
});
// LZW-compress a string
function lzw_encode(s) {
var dict = {};
var data = (s + "").split("");
var out = [];
var currChar;
var phrase = data[0];
var code = 256;
for (var i=1; i<data.length; i++) {
currChar=data[i];
if (dict[phrase + currChar] != null) {
phrase += currChar;
}
else {
out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
dict[phrase + currChar] = code;
code++;
phrase=currChar;
}
}
out.push(phrase.length > 1 ? dict[phrase] : phrase.charCodeAt(0));
for (var i=0; i<out.length; i++) {
out[i] = String.fromCharCode(out[i]);
}
return out.join("");
}
// Decompress an LZW-encoded string
function lzw_decode(s) {
var dict = {};
var data = (s + "").split("");
var currChar = data[0];
var oldPhrase = currChar;
var out = [currChar];
var code = 256;
var phrase;
for (var i=1; i<data.length; i++) {
var currCode = data[i].charCodeAt(0);
if (currCode < 256) {
phrase = data[i];
}
else {
phrase = dict[currCode] ? dict[currCode] : (oldPhrase + currChar);
}
out.push(phrase);
currChar = phrase.charAt(0);
dict[code] = oldPhrase + currChar;
code++;
oldPhrase = phrase;
}
return out.join("");
}
};
}; /* Sample Application. */
/**
* main(): Main code.
*/
var zapp = new SampleApp();
zapp.initialize();
zapp.start();