Socket.io, Codeigniter, Redis session store to create push notifications

Question

I have a codeigniter app I want to implement push notifications for. I use mysql as backend database, but I use redis as the session store so I can use it with node (just preference). When a user connects to node they pass there session id via the query parameter on

io.connect('http://123.45.67.89:3434', { query: "sessId="+sessionId })

and on the server I get it like this:

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

    // get user details from redis using the session id sent here

    console.log('User Session Id: ', handshakeData._query.sessId);
    accept(null, true);
});

I am able to get the users data out of redis to save a list of connected users.

I want to save a list of connected users in an array with their profile_id and the socket.id

client_list[user.profile_id] = socket.id;

so i can search for users via id and get their socket connection id and send that user a notification for what ever reason.

My problem is I can send the sessionId in the authorization event but can't get the socket.id, and I can get the socket.id in the connection event but can't pass data along on that event.

How can I send a session id and get the socket.id on connection to the socket.io server?

Thanks in advanced :)

score 0 · Answer 1 · answered Jul 24 '14 at 11:19

It turns out you can access the data from the query sent in the authorization event in the connection event like:

socket.request._query.sessId

(sessId is a custom key sent from client connection query, see question for clarification)

This way you can capture the users socket.id and data from the query on the connection event.

Socket.io, Codeigniter, Redis session store to create push notifications

1 Answers1