How to access req.session variables from within socket.io?

Question

How to access req.session variables from within socket.io?

I am working with express and socket.io. I have some req.session variables I wish to access from within socket.io. I read this post on socket.io and session and I am still very confused as to how I can get a req.session variable.

node.js
express
socket.io
session-cookies

Answer 1

One way to accomplish this is by using your session store from inside your socket - which will have your all you session variables. This is how I do an authorization (compare cookie ID with session ID from database).

io.set('authorization', function (data, accept) {

    if (data.headers.cookie) {

        data.cookie = utils.parseCookie(data.headers.cookie);
        data.sessionID = data.cookie['connect.sid'].split('.')[0].substring(2);

        sessionStore.get(data.sessionID, function (err, session) {
                // now you have all session variables
        });                     
    }
});