File: split-cache-popup-with-iframe.html

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<!doctype html>
<html>
<head>
  <meta charset="utf-8">
  <title>HTTP Cache - helper</title>
  <meta name="help" href="https://fetch.spec.whatwg.org/#http-cache-partitions">
  <meta name="timeout" content="normal">
  <script src="/resources/testharness.js"></script>
  <script src="/common/get-host-info.sub.js"></script>
</head>
<body>
<script>
  const host = get_host_info();

  // Create iframe that is same-origin to the opener.
  var iframe = document.createElement("iframe");
  iframe.src = host.HTTP_ORIGIN + window.location.pathname.replace(/\/[^\/]*$/, '/') + "split-cache-popup.html";
  document.body.appendChild(iframe);

  window.addEventListener("message", function listener(event) {
    if (event.origin !== host.HTTP_ORIGIN) {
      // Ignore messages not from the iframe or opener
      return;
    } else if (typeof(event.data) === "object") {
      // This message came from the opener, pass it on to the iframe
      iframe.contentWindow.postMessage(event.data, host.HTTP_ORIGIN);
    } else if (typeof(event.data) === "string") {
      // This message came from the iframe, pass it on to the opener
      window.opener.postMessage(event.data, host.HTTP_ORIGIN);
    }
  })
</script>
</body>
</html>