Socket.io 1.0.5 : How to save session variables?

Question

Unfortunately socket.io developer team decided to deprecate functions set() and get(). The problem is that these two functions allowed us to save variable into session.

So my question is : What is the equivalent of the folloing code on socket.io 1.0.5 ?

socket.set('mySessionVar', 'myValue');

socket.get('mySessionVar', function (error, mySessionVar) {
    console.log('I have a super variable save in the session : '+mySessionVar);
    socket.emit('mySessionVar', mySessionVar);
});

Thank you for your help, Guillaume.

Answer 1

socket.io-handshake is session middleware for socket.io 1.x. It is built on top of express-session and cookie-parser. I know we are talking about socket.io and not express, but it still works with socket.io. This example will make your sessions live on a redis store.

var expressSession = require('express-session');
var connectRedis = require('connect-redis')(expressSession);
var cookieParser = require('cookie-parser');
var config = { session: { secret:'secret', key: 'bus.io', store: new connectRedis() } };
var handshake = require('socket.io-handshake');
var io = require('socket.io')(3000);
io.use(handshake(config.session));
io.on('connection', function (socket) {
  socket.handshake.session.data = "whatever data I want";
  socket.handshake.session.save();
});

Answer 2

Your 'socket' is a Javascript object, to which you can add any additional key/values.

socket['mySessionVar'] = 'myValue';
console.log( "I have a super variable save in the session: " + socket['mySessionVar']);