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<!DOCTYPE html>
<meta charset=utf-8>
<meta name=variant content="?isCrossOriginPreload=true&isCrossOriginResource=true">
<meta name=variant content="?isCrossOriginPreload=true&isCrossOriginResource=false">
<meta name=variant content="?isCrossOriginPreload=false&isCrossOriginResource=true">
<meta name=variant content="?isCrossOriginPreload=false&isCrossOriginResource=false">
<title>The referrerpolicy attribute on Link header should be ignored for subresources</title>
<meta name="timeout" content="long">
<script src="resources/dummy.js?link-header-preload2"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/common/utils.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/preload/resources/preload_helper.js"></script>
<body>
<p>The referrerpolicy attribute on Link header should be ignored for subresources
to prevent cross-origin referrer leakage</p>
<script>
window.referrers = {};
const {REMOTE_ORIGIN} = get_host_info();
async function loader(t, {preloadPolicy, resourcePolicy, isCrossOriginResource, hrefUrl, hrefParams}) {
const img = document.createElement('img');
const params = new URLSearchParams();
params.set('href', `${hrefUrl}?${hrefParams.toString()}`);
if (preloadPolicy === '')
params.set('preload-policy', '');
else
params.set('preload-policy', `referrerpolicy=${preloadPolicy}`);
params.set('resource-name', 'green.png');
img.src = `${isCrossOriginResource ? REMOTE_ORIGIN : location.origin}/preload/resources/link-header-referrer-policy.py?${params.toString()}`;
img.referrerPolicy = resourcePolicy;
const preloaded = new Promise(resolve => img.addEventListener('load', resolve));
t.add_cleanup(() => img.remove());
document.body.appendChild(img);
await preloaded;
hrefParams.set('operation', 'take');
const take_href = `${hrefUrl}?${hrefParams.toString()}`;
let actualReferrer;
for (let i = 0; i < 10; ++i) {
actualReferrer = await fetch(take_href).then(res => res.text());
if (actualReferrer === '') {
// Preload request has not yet been received. Retry after timeout.
await new Promise(resolve => t.step_timeout(resolve, 100));
} else {
break;
}
}
return {actualReferrer, unsafe: img.src};
};
function test_referrer_policy(preloadPolicy, resourcePolicy, isCrossOriginPreload, isCrossOriginResource) {
promise_test(async t => {
const id = token();
const hrefUrl = `${isCrossOriginPreload ? REMOTE_ORIGIN : location.origin}/preload/resources/stash-referrer.py`;
const hrefParams = new URLSearchParams();
hrefParams.set('key', id);
hrefParams.set('operation', 'put');
const {actualReferrer, unsafe} = await loader(t, {preloadPolicy, resourcePolicy, isCrossOriginResource, hrefUrl, hrefParams})
assert_equals(actualReferrer, 'NO-REFERER');
}, `referrer policy (${preloadPolicy} -> ${resourcePolicy}, ${isCrossOriginPreload ? 'cross-origin' : 'same-origin'}, ${isCrossOriginResource ? 'cross-origin' : 'same-origin'})`)
}
const policies = [
"",
"no-referrer",
"same-origin",
"origin",
"origin-when-cross-origin",
"strict-origin-when-cross-origin",
"unsafe-url"]
const params = new URLSearchParams(location.search);
const isCrossOriginPreload = params.get('isCrossOriginPreload') === 'true';
const isCrossOriginResource = params.get('isCrossOriginResource') === 'true';
for (const preloadPolicy of policies) {
for (const resourcePolicy of policies) {
test_referrer_policy(
preloadPolicy,
resourcePolicy,
isCrossOriginPreload,
isCrossOriginResource);
}
}
</script>
</body>
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