Socket.IO 1.0.x: Get socket by id

问题

In the 0.9.x version, we can get socket by ID like this:

io.sockets.socket(socketId)

But in 1.0.x we can't. How to find a socket by id in 1.0.x?

回答1:

For socket.io 1.0 use:

io.sockets.connected[socketId]

For 0.9 its io.sockets.sockets[socketId] and not io.sockets.socket[socketId]

回答2:

you can also use like:

io.to(socketid).emit();

回答3:

Socket.io Version 2.0.3+

    let namespace = null;
    let ns = _io.of(namespace || "/");
    let socket = ns.connected[socketId] // assuming you have  id of the socket

回答4:

The most simlple way I tried is:

var socket1 = io.of("/").connected[socketId];

Then you can do

socket1.join("some room");
socket1.leave("some room");
socket1.emit();

or other things you want.

来源：https://stackoverflow.com/questions/27055989/socket-io-1-0-x-get-socket-by-id