ws_server.js

var WebSocketServer = require('websocket').server;
var http = require('http');

var server = http.createServer(function(request, response) {
    // process HTTP request. Since we're writing just WebSockets server
    // we don't have to implement anything.
});
server.listen(8080, function() { });

// create the server
wsServer = new WebSocketServer({
  httpServer: server
});

// WebSocket server
wsServer.on('request', function(request) {
  var connection = request.accept(null, request.origin);

    // This is the most important callback for us, we'll handle
    // all messages from users here.
//  setInterval(function() {
//    console.log("Sending message");
//    connection.sendUTF("asdfasdfasdf");
//  }, 2000);
  

  connection.on('message', function(message) {
    if (message.type === 'utf8') {
      console.log('Received Message: ' + message.utf8Data);
      connection.sendUTF("hi " + message.utf8Data);
    } 
  });

  connection.on('close', function(connection) {
        // close user connection
  });
});