如何检查套接字是否已发出

Question

I access the socket of a client that connects like this

io.on('connect', (socket) => {
  saveSocketSomwhere(socket)
});

Later on in my code, how can I check if socket has been emitted on? Does it carry any state of that sort?

Answer 1

you have the possibility to save the socket in array like this:

connections = [];
io.sockets.on('connection', function (socket) {
    connections.push(socket);
    console.log('Connected: %s sockets connected', connections.length);

    // and remove like this
    socket.on('disconnect', function (data) {
        connections.splice(connections.indexOf(socket));
        console.log('Disconnected: %s sockets connected', connections.length);
    });

});