How to get all the sockets connected to Socket.io

Question

I did some search here and found this answer

// list all connected sockets
    var list = io.sockets.sockets;
    console.log("Connected sockets:");
    list.forEach(function(s) {
        console.log("    socket.id = ", s.id);
    });

But because io.sockets.sockets; that mentioned there is NOT an array it doesn't work.so i have 2 questions :

a)How can i access to all sockets connected?

b)How can i access to sockets connected to specific room?

Cheers

PS:this question is asked before but those questions are out dated.

Answer 1

In latest version of socket.io (1.4.5) you'l have to do

Object.keys(io.sockets.sockets);

This returns an array containing id's of sockets connected and you can apply forEach on it.

Object.keys(io.sockets.sockets).forEach(function(id) {
    console.log("ID:",id)  // socketId
})

Ok now for the B part, for getting array of socketids off sockets connected to a room use

Object.keys(io.sockets.adapter.rooms["ROOM_NAME"].sockets) //returns array of socketId's