Sending message to a specific ID in Socket.IO 1.0

Question

I want to sent data to one specific socket ID.

We used to be able to do this in the older versions:

io.sockets.socket(socketid).emit(\'message\', \'         


        

Answer 1

I believe both @Curious and @MustafaDokumacı provided solutions that work well. The difference though is that with @MustafaDokumacı's solution the message is broadcasted to a room and not only to a particular client.

The difference is prominent when an acknowledgement is requested.

io.sockets.connected[socketid].emit('message', 'for your eyes only', function(data) {...});

works as expected, while

io.to(socketid).emit('message', 'for your eyes only', function(data) {...});

fails with

Error: Callbacks are not supported when broadcasting