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<!DOCTYPE html>
<meta name="timeout" content="long">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src='/resources/testdriver-vendor.js'></script>
<script src="/common/dispatcher/dispatcher.js"></script>
<script src="/common/subset-tests-by-key.js"></script>
<script src="/common/utils.js"></script>
<script src="../../resources/utils.js"></script>
<script src="../resources/utils.sub.js"></script>
<meta name="variant" content="?include=unchanged">
<meta name="variant" content="?include=changed">
<meta name="variant" content="?include=unchangedWithRedirect">
<meta name="variant" content="?include=changedWithRedirect">
<meta name="variant" content="?include=changedWithRedirect2">
<meta name="variant" content="?include=changedWithRedirect3">
<!--
This is a test for the integration of
https://mnot.github.io/I-D/draft-nottingham-http-availability-hints.html
with prefetch. Chromium has an implementation of such integration
behind a flag; see https://issues.chromium.org/issues/328628231.
-->
<script>
setup(() => assertSpeculationRulesIsSupported());
subsetTestByKey("unchanged", promise_test, async t => {
await test_driver.delete_all_cookies();
document.cookie = 'vary1=hello';
let agent = await spawnWindow(t);
let nextUrl = agent.getExecutorURL({ executor: "cookies.py", cookieindices: "1" });
await agent.forceSinglePrefetch(nextUrl);
await agent.navigate(nextUrl);
assert_prefetched(await agent.getRequestHeaders());
let request_cookies = await agent.getRequestCookies();
let response_cookies = await agent.getResponseCookies();
assert_equals(request_cookies.vary1, "hello");
assert_equals(request_cookies.vary2, undefined);
assert_equals(response_cookies.vary1, "hello");
assert_equals(response_cookies.vary2, undefined);
}, "Cookie-Indices should not prevent a prefetch from succeeding if the cookie has not changed.");
subsetTestByKey("changed", promise_test, async t => {
await test_driver.delete_all_cookies();
document.cookie = 'vary1=hello';
let agent = await spawnWindow(t);
let nextUrl = agent.getExecutorURL({ executor: "cookies.py", cookieindices: "1" });
await agent.forceSinglePrefetch(nextUrl);
document.cookie = 'vary1=two';
await agent.navigate(nextUrl);
assert_not_prefetched(await agent.getRequestHeaders());
let request_cookies = await agent.getRequestCookies();
let response_cookies = await agent.getResponseCookies();
assert_equals(request_cookies.vary1, "two");
assert_equals(request_cookies.vary2, undefined);
assert_equals(response_cookies.vary1, "two");
assert_equals(response_cookies.vary2, undefined);
}, "Cookie-Indices should prevent a prefetch from being used if the cookie has changed.");
subsetTestByKey("unchangedWithRedirect", promise_test, async t => {
await test_driver.delete_all_cookies();
document.cookie = 'vary1=hello';
let agent = await spawnWindow(t);
let finalUrl = agent.getExecutorURL({ executor: "cookies.py", cookieindices: "1" });
let nextUrl = new URL("/common/redirect.py?location=" + encodeURIComponent(finalUrl), document.baseURI);
await agent.forceSinglePrefetch(nextUrl);
await agent.navigate(nextUrl, {expectedDestinationUrl: finalUrl});
assert_prefetched(await agent.getRequestHeaders());
let request_cookies = await agent.getRequestCookies();
let response_cookies = await agent.getResponseCookies();
assert_equals(request_cookies.vary1, "hello");
assert_equals(request_cookies.vary2, undefined);
assert_equals(response_cookies.vary1, "hello");
assert_equals(response_cookies.vary2, undefined);
}, "Cookie-Indices should not prevent a prefetch from succeeding with unchanged cookies, even with redirect");
subsetTestByKey("changedWithRedirect", promise_test, async t => {
await test_driver.delete_all_cookies();
document.cookie = 'vary1=hello';
let agent = await spawnWindow(t);
let finalUrl = agent.getExecutorURL({ executor: "cookies.py", cookieindices: "1" });
let nextUrl = new URL("/common/redirect.py?location=" + encodeURIComponent(finalUrl), document.baseURI);
await agent.forceSinglePrefetch(nextUrl);
document.cookie = 'vary1=two';
await agent.navigate(nextUrl, {expectedDestinationUrl: finalUrl});
assert_not_prefetched(await agent.getRequestHeaders());
let request_cookies = await agent.getRequestCookies();
let response_cookies = await agent.getResponseCookies();
assert_equals(request_cookies.vary1, "two");
assert_equals(request_cookies.vary2, undefined);
assert_equals(response_cookies.vary1, "two");
assert_equals(response_cookies.vary2, undefined);
}, "Cookie-Indices should prevent a prefetch from succeeding if the cookie changed, with a redirect");
subsetTestByKey("changedWithRedirect2", promise_test, async t => {
await test_driver.delete_all_cookies();
document.cookie = 'vary1=hello';
let agent = await spawnWindow(t);
// One subtlety here: the wptserve pipe parser doesn't allow commas inside
// the header value (since that delimits the pipe arguments).
// There is currently no way around this, so we simply don't use a value with a comma.
let finalUrl = agent.getExecutorURL({ executor: "cookies.py" });
let pipe = "header(Cache-Control,no-store)|header(Vary,Cookie)|header(Cookie-Indices,\"vary1\")";
let nextUrl = new URL(`/common/redirect.py?location=${encodeURIComponent(finalUrl)}&pipe=${encodeURIComponent(pipe)}`, document.baseURI);
await agent.forceSinglePrefetch(nextUrl);
document.cookie = 'vary1=two';
await agent.navigate(nextUrl, {expectedDestinationUrl: finalUrl});
assert_prefetched(await agent.getRequestHeaders());
let request_cookies = await agent.getRequestCookies();
let response_cookies = await agent.getResponseCookies();
assert_equals(request_cookies.vary1, "hello");
assert_equals(request_cookies.vary2, undefined);
assert_equals(response_cookies.vary1, "two");
assert_equals(response_cookies.vary2, undefined);
}, "If the redirect needs to be rerequested but goes to the same place and that one doesn't vary, we actually can use the prefetched final response.");
subsetTestByKey("changedWithRedirect3", promise_test, async t => {
await test_driver.delete_all_cookies();
document.cookie = 'vary1=hello';
let agent = await spawnWindow(t);
// One subtlety here: the wptserve pipe parser doesn't allow commas inside
// the header value (since that delimits the pipe arguments).
// There is currently no way around this, so we simply don't use a value with a comma.
let finalUrl = agent.getExecutorURL({ executor: "cookies.py" });
let pipe = "header(Cache-Control,no-store)|header(Vary,Cookie)|header(Cookie-Indices,\"vary1\")";
let nextUrl = new URL(`resources/random_redirect.py?location=${encodeURIComponent(finalUrl)}&pipe=${encodeURIComponent(pipe)}`, document.baseURI);
await agent.forceSinglePrefetch(nextUrl);
document.cookie = 'vary1=two';
await agent.navigate(nextUrl, {expectedDestinationUrl: null});
assert_not_prefetched(await agent.getRequestHeaders());
let request_cookies = await agent.getRequestCookies();
let response_cookies = await agent.getResponseCookies();
assert_equals(request_cookies.vary1, "two");
assert_equals(request_cookies.vary2, undefined);
assert_equals(response_cookies.vary1, "two");
assert_equals(response_cookies.vary2, undefined);
}, "If the redirect needs to be rerequested and goes elsewhere, we cannot can use the prefetched final response.");
</script>
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