failed connection to socket.io: No session found

[bernatixer]

Hello, I've been searching for hours and I still can't solve this error.

I'm getting the "failed connection to socket.io: No session found" error.

Passport is working correctly and Redis stores sessions.

Redis

127.0.0.1:6379> keys *
1) "sess:asCxEAJ0ZTS8JRHoSN33AMvA"
2) "sess:Rgxyo5Ao4pxNKsjvhBl51ykv"
3) "sess:3QVzhkBqDalzWMHEcEVgeUlY"
4) "sess:tadGVHqhN8GV8LapudZDlGGa"
5) "sess:kC8paeLpcSXd9BlA0oA13Oox"
127.0.0.1:6379>

server.js

// set up ======================================================================
var express = require('express');
var app = express();
var http = require('http').Server(app);
var io = require('socket.io')(http);
var port = 80;

var passport = require('passport');
var flash    = require('connect-flash');

var cookieParser = require('cookie-parser');
var bodyParser   = require('body-parser');
var session      = require('express-session');

var passportSocketIo = require('passport.socketio');

var RedisStore = require('connect-redis')(session);

var sessionStore = new RedisStore({ // Create a session Store
    host: 'localhost',
    port: 6379,
});

// optimization ================================================================
var compress = require('compression');
app.use(compress());

// configuration ===============================================================
require('./passport')(passport); // pass passport for configuration

// set up our express application
app.use(cookieParser()); // read cookies (needed for auth)
app.use(bodyParser.json()); // get information from html forms
app.use(bodyParser.urlencoded({ extended: true }));

app.set('view engine', 'ejs'); // set up ejs for templating
app.use( express.static( "public" ) );

// required for passport
app.use(session({
    secret: 'sekret',
    store: sessionStore,
    cookie: { maxAge: 30 * 24 * 60 * 60 * 1000 }, // 30 days
    saveUninitialized: true,
    resave: true
})); // session secret
app.use(passport.initialize());
app.use(passport.session()); // persistent login sessions
app.use(flash()); // use connect-flash for flash messages stored in session

// routes ======================================================================
require('./routes.js')(app, passport); // load our routes and pass in our app and fully configured passport

// socket.io====================================================================

//With Socket.io >= 1.0
io.use(passportSocketIo.authorize({
    passport : passport,
    cookieParser: cookieParser,       // the same middleware you registrer in express
    key:          'express.sid',       // the name of the cookie where express/connect stores its session_id
    secret:       'sekret',    // the session_secret to parse the cookie
    store:        sessionStore,        // we NEED to use a sessionstore. no memorystore please
    success:      onAuthorizeSuccess,  // *optional* callback on success - read more below
    fail:         onAuthorizeFail     // *optional* callback on fail/error - read more below
}));

function onAuthorizeSuccess(data, accept){
    console.log('successful connection to socket.io');
    accept(); //Let the user through
}

function onAuthorizeFail(data, message, error, accept){
    if(error) accept(new Error(message));
    console.log('failed connection to socket.io:', message);
    accept(null, false);
}

io.on ('connection', function(socket) {
    console.log("A USER LOGGED IN WITH ID: " + socket.request.user); 
});

// launch ======================================================================
http.listen(port, function(){
  console.log('\u001B[1m\u001B[42m\u001B[97m[SERVER] Started server on 127.0.0.1:'+port+'\u001B[0m');
});

client side
var socket = io.connect('/');

I am missing something? Doing something wrong?
Exactly on this line "key: 'express.sid'", there's people who put 'express.key' and other that use 'express.sid' wich one is correct, or both of them are?

Thanks!

[bernatixer]

The solution is changing the line key: 'express.sid' to key: 'connect.sid'.