Socket.io can't access same session as Express

Question

I'm trying to use express and socket.io with shared sessions, I got it already once working, but somehow it won't work anymore.

I followed this link How to share sessions with Socket.IO 1.x and Express 4.x? and got access to session on socket.io, but it's not somehow same session. It seems that every socket.io connection it generates new session.

Express

req.session.test == 'Some value'

Socket.io

socket.request.session.test == undefined

Am I missing something, or is it a bug with some of those modules?

-- Edit -- Edit -- Edit --

Found what causes the problem is that i when I set cookie with following

cookie: {
    domain: '.local.fi' 
}

I need to have same session across subdomains, how can I do it if not this way as many pages succested?

-- Edit -- Edit -- Edit --

package.json

{
   "dependencies": {
      "express": "^4.13.4",
      "express-session": "^1.13.0",
      "socket.io-session": "^0.0.5",
      "express-socket.io-session": "^1.3.1",    
       "socket.io": "^1.4.5"
   }
}

Start of my index.js

'use strict'
var express = require('express'),
    session = require('express-session'),
    app = express(),
    server = require('http').Server(app),
    io = require('socket.io')(server)

I create sessionMiddleware like this

let connection = mongoose.createConnection('mongodb://localhost/sessions')
var sessionMiddleware = session({
    secret: 'session-secret',
    saveUninitialized: true,
    resave: true,
    name: 'sess.sid',
    store: new MongoStore({
        mongooseConnection: connection,
        ttl: 60 * 60 * 172800
    }),
    cookie: {
        domain: '.local.fi',
        maxAge: 1000 * 60 * 60 * 172800
    }
})

And attach it like this

app.use(sessionMiddleware)
io.use(function(socket, next) {
    sessionMiddleware(socket.request, socket.request.res, next)    
})

Express routes

app.get('/', function(req, res) {
    if(!req.session.test)
        req.session.test = 'Some value'
    res.send(`
        <html>
            <head>
                <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.2/jquery.min.js"></script>
                <script type='text/javascript' src='/socket.io/socket.io.js'></script>
                <script>
                    $(document).ready(function() {
                        var sio = io.connect('localhost')
                        sio.on('connected', function(data) {
                            $('#list').empty()
                            console.log(data)
                        })
                        sio.on('broadcast', function(data) {
                            $('#list').append($(data))
                        })
                    })
                </script>
            </head>
            <body>
                <h5> Session result => ${req.session.test} </h5>
                <div>
                    <ul id='list'></ul>
                </div>
            </body>
        </html>

    `)
})

Socket.io routes

io.on('connection', function(socket) {
    console.log('Client connected')
    socket.emit('connected', { response: 'connection', session: socket.request.session})
    var tick = 0
    var interval = setInterval(function() {
        tick++
        socket.emit('broadcast', `<li>Tick ${socket.request.session.test}</li>`)
        if(tick>100)
            clearInterval(interval)
    }, 1000)
})

And end of index.js

server.listen(80)
console.log('Test listening port 80')

I tried also with these but without any help

socket.io-session https://www.npmjs.com/package/socket.io-session

express-socket.io-session https://www.npmjs.com/package/express-socket.io-session

how are you verifying your changes? Have you removed all session storage/cookies after making changes? — dm03514, May 03 '16 at 13:08
Yes I cleared all cookies from browser and cleared all session data from mongodb. I found resolution for my issue and will answer for my own question for futher readers — EspeH, May 03 '16 at 13:11

score 3 · Accepted Answer · answered May 03 '16 at 13:16

✓ Found resolution for this issue.

Problem was when I connect socket.io on client side.

I set cookie domain as .local.fi and connected to localhost

On declaration

cookie: {
    domain: '.local.fi'
}

Clientside

From

var socket = io.connect('localhost')

To

var socket = io.connect('local.fi')

score 0 · Answer 2 · answered May 03 '16 at 00:44

I would change

session = session({...

to

sessionMiddleware = session({...

You are overwriting the session variable that you declare earlier in

session = require('express-session')

so you are most likely running into conflicts by doing that. So you would have

var sessionMiddleware = session({
  secret: 'session-secret',
  saveUninitialized: true,
  resave: true,
  name: 'sess.sid',
  store: new MongoStore({
    mongooseConnection: connection,
    ttl: 60 * 60 * 172800
  }),
  cookie: {
    domain: '.local.fi',
    maxAge: 1000 * 60 * 60 * 172800/*,
    expires: moment().add(7, 'days')*/
  }
})
app.use(sessionMiddleware)
io.use(function(socket, next) {
  sessionMiddleware(socket.request, socket.request.res, next)    
})

I'm actually using variable sessionMiddleware, but it doesn't help or make any changes, fixed this part into my question. — EspeH, May 03 '16 at 12:38

Socket.io can't access same session as Express

2 Answers2

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