Any way to get statistics for amount of data sent to each client?

[stodge]

I need to track statistics for bandwidth usage, number of clients and hence bandwidth per client. Is there any way to get the amount of data that was sent to a client using io.emit(...)?

[darrachequesne]

Hmm, there is currently no built-in way to do that. You could listen to the packetCreate event:

socket.conn.on("packetCreate", (packet) => {
  if (packet.data) {
    socket.totalAmount += Buffer.byteLength(packet.data);
  }
});

Though it might not represent the actual amount, since the payload can then be compressed down the line (it should be OK for WebSocket connections though, if the permessage-deflate extension is disabled, which is the default).