Joining socket io room on connect

Question

I am trying to make a logged in user to join a certain socket.io room on connect. According to any examples I found on the net I seem to have emit some action from client to be

Answer 1

This is easily achieved. All you need to do is pass along a query parameter that the server understands.

The following example isn't fully tested, but the idea will work. In this example, the roomname is determined from window.location.href on the client.

Client

// Last segment of path is roomName
var roomName = window.location.href.substr(window.location.href.lastIndexOf('/') + 1);
var socket = io({
    query: {
        roomName: roomName,
    },
});

Server

var io = require('socket.io')(server);
io.on('connection', function(socket) {
    var query = socket.handshake.query;
    var roomName = query.roomName;
    if(!roomName) {
        // Handle this as required
    }
    socket.join(roomName);
});