nodejs with WebSocketServer checking which client has closed a connection - node.js

Question

I have WebSocketServer listening to connecting clients. Unfortunately I can't find a way to check which client has closed a connection.
In
ws.on('close',function(){ });
how can I check which user ws belongs to?
var WebSocketServer = require('ws').Server , wss = new WebSocketServer({port: 8080});
var playersConnected=[];
var playersConnectedByID=[];
var playersConnectedBySock=[];
wss.on('connection', function(ws) {
console.log("somebody connected");
playerID=Math.floor(Math.random() * (100000000 - 0+1) + 0);
playerID=playerID.toString();
ws.send("newID="+playerID);
//inserting new player into the right place
l=playersConnected.length; console.log("Current array length is "+l);
playersConnected[l]=([playerID,ws,"free"]);
l=playersConnected.length;
for(i=0;i<l;i++) console.log(i+" "+playersConnected[i][0]);
console.log("=================================================");
ws.on('close',function(){console.log("closing ");});
ws.on('message', function(message) {
console.log('%s send received mess %s',playerID,message);
}
);
});
process.on('uncaughtException', function (err) {
console.log("bad connect");
console.log(err);
});

Answer 1

Every function forms a closure for local variables, so you could just use an object which contains all necessary informations:
wss.on('connection', function(ws) {
var playerID = Math.floor(Math.random() * (100000000 - 0+1) + 0);
playerID = playerID.toString();
var connection = {
socket: ws,
playerID: playerID
};
console.log("connected",connection);
// add your other code here
ws.on('close',function(){
console.log("closing ", connection);
// you will probably change this to remove_from_userlist() or similar
});
});