Socket.io Connected User Count

Question

I finally got socket.io to work properly, but I have encountered a strange problem.

I am not sure if this is the best way, but I am using:

io.sockets.cli         


        

Answer 1

There is a github issue for this. The problem is that whenever someone disconnects socket.io doesn't delete ( splice ) from the array, but simply sets the value to "null", so in fact you have a lot of null values in your array, which make your clients().length bigger than the connections you have in reality.

You have to manage a different way for counting your clients, e.g. something like

socket.on('connect', function() { connectCounter++; });
socket.on('disconnect', function() { connectCounter--; });

It's a mind buzz, why the people behind socket.io have left the things like that, but it is better explain in the github issue, which I posted as a link!