relay/server/ws-test.html

<script>
  function startWebsocket() {

      var ws
    try {
        ws = new WebSocket("ws://${url.host}/api/relay");
    }catch (e) {
        setTimeout(startWebsocket, 10);
    }
  

    ws.onmessage = function (event) {
      console.log(JSON.parse(event.data));
    };

    ws.onclose = function (event) {
      // connection closed, discard old websocket and create a new one in 5s
      ws = null;
      setTimeout(startWebsocket, 10);
    };
  }

  startWebsocket();
</script>

<h1>WebSocket Session</h1>

<p>This is a WebSocket session.</p>

<p>Open JavaScript console to see messages.</p>