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<!DOCTYPE html>
<title>Prefetch with the referrer policy specified in speculation rules</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="/common/subset-tests.js"></script>
<script src="/common/utils.js"></script>
<script src="../resources/utils.js"></script>
<script src="resources/utils.sub.js"></script>
<!--Split test cases due to the use of timeouts in speculation rules test utilities.-->
<meta name="variant" content="?1-1">
<meta name="variant" content="?2-2">
<meta name="variant" content="?3-3">
<meta name="variant" content="?4-4">
<meta name="variant" content="?5-5">
<meta name="variant" content="?6-6">
<meta name="variant" content="?7-7">
<meta name="variant" content="?8-last">
<script>
"use strict";
setup(() => assertSpeculationRulesIsSupported());
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("strict-origin-when-cross-origin");
const expectedReferrer = agent.getExecutorURL().origin + "/";
const nextURL = agent.getExecutorURL({ page: 2 });
await agent.forceSinglePrefetch(nextURL, { referrer_policy: "strict-origin" });
await agent.navigate(nextURL);
const headers = await agent.getRequestHeaders();
assert_prefetched(headers, "must be prefetched");
assert_equals(headers.referer, expectedReferrer, "must send the origin as the referrer");
}, 'with "strict-origin" referrer policy in rule set overriding "strict-origin-when-cross-origin" of referring page');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
const next_url = agent.getExecutorURL({ page: 2 });
await agent.execute_script((url) => {
const a = addLink(url);
a.referrerPolicy = 'no-referrer';
insertDocumentRule(undefined, { referrer_policy: 'strict-origin' });
}, [next_url]);
await new Promise(resolve => t.step_timeout(resolve, 2000));
await agent.navigate(next_url);
const headers = await agent.getRequestHeaders();
assert_prefetched(headers, 'must be prefetched');
const expected_referrer = next_url.origin + '/';
assert_equals(headers.referer, expected_referrer, 'must send the origin as the referrer');
}, 'with "strict-origin" referrer policy in rule set override "no-referrer" of link');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("unsafe-url");
const nextURL = agent.getExecutorURL({ hostname: PREFETCH_PROXY_BYPASS_HOST, page: 2 });
await agent.forceSinglePrefetch(nextURL, { referrer_policy: "no-referrer" });
await agent.navigate(nextURL);
// This referring page's referrer policy would not be eligible for
// cross-site prefetching, but setting a sufficiently strict policy in the
// rule allows for prefetching.
const headers = await agent.getRequestHeaders();
assert_prefetched(headers, "must be prefetched");
assert_equals(headers.referer, '', "must send no referrer");
}, 'with "no-referrer" referrer policy in rule set overriding "unsafe-url" of cross-site referring page');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("strict-origin-when-cross-origin");
const nextURL = agent.getExecutorURL({ page: 2 });
await agent.forceSinglePrefetch(nextURL, { referrer_policy: "no-referrrrrrrer" });
await agent.navigate(nextURL);
const headers = await agent.getRequestHeaders();
assert_not_prefetched(headers, "must not be prefetched");
}, 'unrecognized policies invalidate the rule');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("strict-origin");
const expectedReferrer = agent.getExecutorURL().origin + "/";
const nextURL = agent.getExecutorURL({ page: 2 });
await agent.execute_script((url) => {
const a = addLink(url);
a.referrerPolicy = 'no-referrrrrrrer';
insertDocumentRule();
}, [nextURL]);
await new Promise(resolve => t.step_timeout(resolve, 2000));
await agent.navigate(nextURL);
const headers = await agent.getRequestHeaders();
assert_prefetched(headers, "must be prefetched");
assert_equals(headers.referer, expectedReferrer, "must send the origin as the referrer");
}, 'unrecognized policies in link referrerpolicy attribute are ignored');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("strict-origin-when-cross-origin");
const nextURL = agent.getExecutorURL({ page: 2 });
await agent.forceSinglePrefetch(nextURL, { referrer_policy: "never" });
await agent.navigate(nextURL);
const headers = await agent.getRequestHeaders();
assert_not_prefetched(headers, "must not be prefetched");
}, 'treat legacy referrer policy values as invalid');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("strict-origin");
const expectedReferrer = agent.getExecutorURL().origin + "/";
const nextURL = agent.getExecutorURL({ hostname: PREFETCH_PROXY_BYPASS_HOST, page: 2 });
await agent.forceSinglePrefetch(nextURL, { referrer_policy: "unsafe-url" });
await agent.navigate(nextURL);
// This referring page's referrer policy would normally make it eligible for
// cross-site prefetching, but setting an unacceptable policy in the rule
// makes it ineligible.
const headers = await agent.getRequestHeaders();
assert_not_prefetched(headers, "must not be prefetched");
assert_equals(headers.referer, expectedReferrer, "must send the origin as the referrer");
}, 'with "unsafe-url" referrer policy in rule set overriding "strict-origin" of cross-site referring page');
subsetTest(promise_test, async t => {
const agent = await spawnWindow(t);
await agent.setReferrerPolicy("strict-origin");
const expectedReferrer = agent.getExecutorURL().origin + "/";
const nextURL = agent.getExecutorURL({ page: 2 });
// The empty string is a valid value for "referrer_policy" and will be
// treated as if the key were omitted.
await agent.forceSinglePrefetch(nextURL, { referrer_policy: "" });
await agent.navigate(nextURL);
const headers = await agent.getRequestHeaders();
assert_prefetched(headers, "must be prefetched");
assert_equals(headers.referer, expectedReferrer, "must send the origin as the referrer");
}, 'with empty string referrer policy in rule set defaulting to "strict-origin" of referring page');
</script>
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