Add an event for client disconnect of namespace on server

[altjz]

Add an event for client disconnect of namespace on server

[mkozjak]

Hi, @altjz! Thanks!

Please use server's connection event to get the socket and set events on it.
https://github.com/elpheria/rpc-websockets/blob/master/API.md#event-connection

For example:

server.on('connection', (socket, request) => {
    socket.on('close', () => {
        // do some cleanup job
    })
})

websockets/ws is the backend library underneath rpc-websockets, so this applies:
https://github.com/websockets/ws/blob/master/doc/ws.md#event-close-1

[altjz]

thanks @mkozjak for quick response.
I tried this before, but is it possible to do some cleanup job after all sockets disconnect from specific namespace?

server.on("connection", (socket, request) => {
    socket.on("close", () =>
    {
        const u = url.parse(request.url, true);
        const ns = u.pathname;
        console.log('client.size: ', server.namespaces[ns].clients.size); // this won't be 0
        if (server.namespaces[ns].clients.size === 0) {
            console.log('clean up');
        }
    })
});