Socket.io: io.sockets.socket(socketId) is gone?

[victorwoo]

In the 0.9.x, we can use io.sockets.socket(socketId), but in 1.0.x, it's gone.
How to find a socket by id in 1.0.x?

[rsdrsd]

Missing that one also.

If I am right, you can get a reference like:

io.sockets.connected[socketid]

But this isn't the preferred method and only works in the current process. There are more ways to get a reference. Just look at the console.log(io).

[victorwoo]

Hi @rsdrsd , thank you for your concern. io.sockets.connected[socketid] works but not in official docs.
I've checked console.log(io) but find nothing helps. Will you please point out which method in io works?
Thank you very much!

[rsdrsd]

I think there isn't a method for this. Just searched the code and couldn't find a method. I also really need something "official" for this, which works also through the redis adapter.

[victorwoo]

According to official document, socket.id seems not used by any API.
So what's the official suggested solution to deal with "private chat" ? Use a custom JavaScript object to preserve username and socket?

{
    username1: Socket1,
    username2: Socket2,
    ...
}

[rsdrsd]

That is possible, but every socket has its own room with its socket id as room name. You could send messages to that room for a private chat.

In your case something like io.to(socket.id).emit() should work.

I need to get an instance to a socket to let that socket join a room, but this seems impossible, because there isn't a method to get a socket reference from a socket.id.

I only can get that refrerence from that connection, but I need to get a reference to that socket from a different connection, because that one confirms that it can join that room.

[victorwoo]

Thank you @rsdrsd , io.to(socket.id).emit() is what I want.
I think the official docs didn't introduce this io.to(socketId) method clearly.

[webmustang]

io.to(socketId) returns default (/) namespace, not room with one socket. And when I do .emit() all sockets of default namespace receive emitted message. Checked in 1.0.6, 1.1.0, 1.2.1.

io.sockets.connected[socketid] - works, but what about redis-adapter?

[martianmartian]

shouldn't it be.
io.connected[socket.id]

? without ".sockets."

[onclave]

Hi, I am using version 1.4.4 and none of the above methods work for me. I want to get a reference to a socket using it's socket.id.
All the above methods mentioned here does not work.
What I really want to do is get a socket reference of one namespace from another namespace. A tutorial gives the following code snippet, but uses 0.9.x version.

var self = this;
//--code--//
this.namespace_A = io.of("ns_a");
this.namespace_B = io.of("bs_b");
//--code--//
this.namespace_B.on("connection", function(socket){
        //--code--//
        var ns_a_soc = self.namespace_A.sockets[socket.id];
        //--code--//
});

I need an alternative to this line var ns_a_soc = self.namespace_A.sockets[socket.id]; for version 1.4.4. Can anyone please help?

[AljoSt]

same problem here

[MasterJames]

Seems to work fine here.
Maybe you need to socket.join('ns_a"); first?

[phpmydev]

Hello! I am using the latest release (2.0) and can't get io.to(socket.id) to work. Any news on this?

[j-f1]

@phpmydev I’d recommend opening a new issue for that — this one seems to be for a different problem.

[StefansArya]

I'm curious if io.to(socket.id).join(roomID) is working too because I can't found in the documentation

[darrachequesne]

@StefansArya io.to(socket.id) is meant to be used with emit (io.to(socket.id).emit('event'), sending a message to that particular socket), it does not return a Socket object.

[StefansArya]

@darrachequesne Thanks for the explanation, I have learn so many things with nodejs REPL and found that I can do this for the alternative... I'll leave this here if someone have a same problem like me..
io.sockets.sockets[targetSocketID].join(roomID)