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server-06.js
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server-06.js
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/*
Using redis for pub-sub
Note that this way of starting the node/socket.js works only locally.
*/
var express = require('express');
var path = require('path');
var cookieParser = require('cookie-parser');
var bodyParser = require('body-parser');
var redis = require("redis");
var session = require('express-session');
var RedisStore = require('connect-redis')(session);
var socketHandshake = require('socket.io-handshake');
var redisHost = '127.0.0.1';
var redisPort = 6379;
var redisDB = 2;
/*
Also use Redis for Session Store. Redis will keep all Express sessions in it.
*/
//var RedisStore = require('connect-redis')(express),
var rClient = redis.createClient(redisPort, redisHost);
var sessionStore = new RedisStore({client:rClient});
var app = express();
var server = require('http').Server(app);
var io = require('socket.io').listen(server);
app.use(express.static(path.join(__dirname, 'public')));
app.use(bodyParser.json());
app.use(cookieParser());
app.use(session({
name: 'jsessionid', // access using req.cookies['jsessionid']
secret: 'secret',
saveUninitialized: true, // avoids warning
resave: true, // avoids warning
store: sessionStore
}));
app.get('/', function(req, res) {
res.sendfile('public/index.html');
});
app.post('/user', function (req, res) {
req.session.user = req.body.user;
console.log("userName: " + req.session.user + " sessionid: " + req.sessionID + " and jsessionid: " + req.cookies['jsessionid']);
res.json({"error":""});
});
var sub = redis.createClient(redisPort, redisHost);
var pub = redis.createClient(redisPort, redisHost);
sub.subscribe('chat-redis');
io.use(socketHandshake({store: sessionStore, key:'jsessionid', secret:'secret', parser:cookieParser()}));
io.on('connection', function (socket) {
console.log('connected');
socket.on('join', function () {
console.log(socket.handshake.session.user + ' joined');
var reply = JSON.stringify({category:'join', user:socket.handshake.session.user, msg:' joined the channel' });
// io.emit('chat', reply);
pub.publish('chat-redis', reply);
});
socket.on('chat', function (message) {
var chatMessage = JSON.parse(message);
var content = chatMessage.msg;
console.log(socket.handshake.session.user + ' pubished a chat message');
var reply = JSON.stringify({category:'chat', user:socket.handshake.session.user, msg: content });
// io.emit('chat', reply);
pub.publish('chat-redis', reply);
});
});
sub.on('message', function (channel, message) {
console.log('got subbed');
// io.emit(channel, message);
io.emit('chat', message);
});
app.set('port', process.env.PORT || 3000);
server.listen(app.get('port'), function () {
var serverName = process.env.VCAP_APP_HOST ? process.env.VCAP_APP_HOST + ":" + process.env.VCAP_APP_PORT : 'localhost:3000';
console.log("Express server listening on " + serverName);
});