Question

socket.on('data', function(data)
{
    console.log(socket.remoteAddress + ":" + socket.remotePort);
}

socket.on('close', function()
{
    console.log(socket.remoteAddress + ":" + socket.remotePort);
}

The log from the data handler displays 127.0.0.1:8000.

The log from the close handler displays undefined:undefined.

I am trying to keep a list of connected sockets using IP:Port as the key. If I don’t know which one closed, how can I remove it from the list? How can I get the IP:Port of the closed socket after it’s closed?

Answer 1

This is how I’m keeping track of the clients:

server.on('connect', function(socket)
{
    socket.key = socket.remoteAddress + ":" + socket.remotePort;
    clients[socket.key] = socket;

    socket.on('close', function()
    {
        delete clients[socket.key];
    }
}

Much thanks to mscdex in the Node.js IRC channel for suggesting this solution!