chat_server.js

gistfile1.js

var net = require('net');

var chatServer = net.createServer(), clientList = [];

chatServer.on('connection', function(client){
  client.name = client.remotePort;
  client.write('Hi ' + client.name + '!\n');

  clientList.push(client);
  console.log("connected clients: " + clientList.length);

  client.on('data', function(data){
    broadcast(data, client);
  });

  client.on('end', function(){
    clientList.splice(clientList.indexOf(client), 1)
  });

  client.on('error', function(e){
    console.log(e);
  });

  function broadcast(message, client){
    var cleanup = [];

    for(var i = 0; i < clientList.length; i+=1){
      if(client !== clientList[i]){
        if(clientList[i].writable) {
          clientList[i].write(client.name + " says: " + message);
        } else {
          cleanup.push(clientList[i]);
          clientList[i].destroy();
        }
      }
    }

    for (var i = 0; i < cleanup.length; i+=1) {
      clientList.splice(clientList.indexOf(cleanup[i]), 1);
    };
  }
});

chatServer.listen(9000);