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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>
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