content/test/data/workers/pass_messageport_to_sharedworker.html

   1 <html>
   2 <head>
   3 <title>Passing MessagePort to a SharedWorker</title>
   4 <script src="worker_utils.js"></script>
   5 <script>
   6 function log(message)
   7 {
   8   document.getElementById("result").innerHTML += message + "<br>";
   9 }
  10
  11 var worker = null;
  12 var message_channel = null;
  13
  14 function do_test() {
  15   worker = new SharedWorker("messageport_worker.js");
  16   worker.port.onmessage = process_message_from_worker;
  17 }
  18
  19 function process_message_from_worker(event) {
  20     log("Message from worker: " + event.data);
  21     if (event.data == "Worker connected.") {
  22       log("Sending a port to the worker.");
  23       message_channel = new MessageChannel();
  24       worker.port.postMessage({message: "Sending a port.", port: message_channel.port2}, [message_channel.port2]);
  25     } else if (event.data == "Worker got a port.") {
  26       // Communicate with the worker via the message channel.
  27       message_channel.port1.onmessage = function (event) {
  28         log("Message from worker (via channel): " + event.data);
  29         if (event.data == "Worker got a message via the passed port.")
  30           onSuccess();
  31         else
  32           onFailure();
  33       };
  34       message_channel.port1.start();
  35       log("Sending a message to the worker via the channel.");
  36       message_channel.port1.postMessage({message: "Message via the channel."});
  37    }
  38 }
  39
  40 </script>
  41 </head>
  42 <body onload="do_test()">
  43 <div id=statusPanel></div>
  44 <div id=result></div>
  45 </body>
  46 </html>