Example #1 from Deploy 2010

Chat.js

var net = require('net'), _ = require('./underscore-min')._;

// Our active connections
var connections = {};

var server = net.createServer(function(sock) {
  sock.setTimeout(0);
  sock.setEncoding("utf8");
  connections[sock.remotePort] = sock;  // Store a reference to the new client

  sock.on('data', function(data) {
    _.each(connections, function(receiver) {
      if (sock !== receiver) { receiver.write(data); } // Send new data to all other sockets
    });
  });

  sock.on('close', function() { delete connections[this.remotePort]; });
});

server.listen(8124, "0.0.0.0");
console.log("Server started");