<html>
  <body>
    <script type="text/javascript">
      var ws = new WebSocket("ws://localhost:8080/web-socket");
      ws.onmessage = function(evt) {
        alert(evt.data);
      };
      ws.onopen = function() {
        ws.send('Hello!');
      }
    </script>
  </body>
</html>