| <!DOCTYPE html> |
| <script> |
| function postMessageWithMessagePorts() { |
| var channel = new MessageChannel(); |
| channel.port1.onmessage = e => { |
| e.ports[0].postMessage("received"); |
| } |
| window.portalHost.postMessage("sending port", {transfer: [channel.port2]}); |
| } |
| |
| function postMessageWithArrayBuffer(array, withTransfer) { |
| var arrayBuffer = new Int8Array(array).buffer; |
| if (withTransfer) { |
| window.portalHost.postMessage({arrayBuffer}, {transfer: [arrayBuffer]}); |
| } else { |
| window.portalHost.postMessage({arrayBuffer}); |
| } |
| } |
| |
| function postMessageAndCatchException(...params) { |
| try { |
| window.portalHost.postMessage(...params); |
| } catch (e) { |
| window.portalHost.postMessage({errorType: e.name}); |
| } |
| } |
| |
| window.portalHost.addEventListener("message", e => { |
| if (e.data.type) { |
| var type = e.data.type; |
| switch (type) { |
| case "message-port": |
| postMessageWithMessagePorts(); |
| return; |
| case "array-buffer-without-transfer": |
| postMessageWithArrayBuffer(e.data.array, false); |
| return; |
| case "array-buffer-with-transfer": |
| postMessageWithArrayBuffer(e.data.array, true); |
| return; |
| case "invalid-message": |
| postMessageAndCatchException(document.body); |
| return; |
| case "invalid-port": |
| postMessageAndCatchException("", {transfer: [null]}); |
| return; |
| } |
| } |
| window.portalHost.postMessage(...e.data); |
| }); |
| </script> |
