header-referrer-inner.html

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<!DOCTYPE html>

<script src="/resources/testharness.js"></script>

<script src="utils.js"></script>

<title>Fenced frame content to report the value of header.referrer</title>

<body>

<script>

async function init() { // Needed in order to use top-level await.

  // This file is meant to run in a <fencedframe>. It reports back to the

  // outermost page the value of `referer` in the request header:

  //   1.) Nested iframes inside a fenced frame

  //   2.) Nested fenced frames

  //   3.) Top-level fenced frames (aka this frame) after initial navigation

  const [referrer_key, referrer_ack_key] = parseKeylist();

  const referrer_url = generateURL("check-header-referrer.py",

      [referrer_key, referrer_ack_key]);

  const iframe = document.createElement('iframe');

  iframe.src = referrer_url;

  document.body.append(iframe);

  // Wait for ACK, so we know that the outer page has read the last value from

  // the `referrer_key` stash that the iframe above wrote to, and we can write

  // to it again.

  await nextValueFromServer(referrer_ack_key);

  attachFencedFrame(referrer_url);

  // Wait for ACK, so we know that the outer page has read the last value from

  // the `referrer_key` stash that the nested fenced frame wrote to, and we can

  // can write to it again.

  await nextValueFromServer(referrer_ack_key);

  location.href = referrer_url;

init();

</script>

</body>