Sending message to specific client with socket.io and empty message queue

Question

I´m going crazy with socket.io! Documentation is so bad it\'s simply not true.

I want to send a feedback to specific client over socket.io

My server side loo

Answer 1

I believe io.sockets.socket has been removed and has been a problem in Socket.IO (https://github.com/socketio/socket.io/issues/1618).

You can use io.sockets.connected[socket.id] and store the socket.id to reference with the user via username:

var usernames = {};
usernames[username] = socket.id;
// Sending the message
io.sockets.connected[usernames[username]].emit(...);

I don't see it anywhere on the documentation so I can see how this hasn't been answered. Also, if you don't have any reference via usernames, you can instead try:

users[socket.id] = socket.id;

to duplicate the key and value for easy access.

There is also possibly another way by using io.clients as described below, but I haven't used that method.

OTHER SOLUTION: Send message to specific client with socket.io and node.js