<!
DOCTYPE html>
<
title>Ensures that prefetch respects HTTP cache semantics</
title>
<
meta name=
"timeout" content=
"long">
<
script src=
"/resources/testharness.js"></
script>
<
script src=
"/resources/testharnessreport.js"></
script>
<
script src=
"/common/utils.js"></
script>
<
script src=
"resources/prefetch-helper.js"></
script>
<
script src=
"/common/get-host-info.sub.js"></
script>
<
body>
<
script>
const {REMOTE_ORIGIN} = get_host_info();
async function prefetch(
link, uid, t) {
link.rel =
"prefetch";
document.
head.appendChild(
link);
const event = new Promise(resolve => {
link.addEventListener(
"error", () => resolve(
"error"));
link.addEventListener(
"load", () => resolve(
"load"));
t.step_timeout(() => resolve(
"timeout"),
1000);
});
return await event;
}
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href = `/preload/resources/prefetch-info.py?key=${uid}`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"load");
},
"Prefetch should fire the load event");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"load");
},
"Cross-origin prefetch should fire the load event");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href = `/preload/resources/prefetch-info.py?key=${uid}&status=
404`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"load");
},
"Prefetch should fire the load event for 404");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}&status=
yle='color: green'>404`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"load");
},
"Prefetch should fire the load event for 404 (cross-origin)");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href = `/preload/resources/prefetch-info.py?key=${uid}&status=
500`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"load");
},
"Prefetch should fire the load event for 500");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}&status=
yle='color: green'>500`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"load");
},
"Cross-origin prefetch should fire the load event for 500");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.crossOrigin =
"anonymous";
link.href = `${REMOTE_ORIGIN}/preload/resources/prefetch-info.py?key=${uid}&cors=false`;
const event = await prefetch(
link, uid, t);
assert_equals(event,
"error");
},
"Prefetch should fire the error event for network errors");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.crossOrigin =
"anonymous";
const event = await prefetch(
link, uid, t);
assert_equals(event,
"timeout");
},
"Prefetch should do nothing with an empty href");
promise_test(async t => {
const uid = token();
const
link = document.createElement(
"link");
link.href =
"https://example.com\u0000mozilla.org";
link.crossOrigin =
"anonymous";
const event = await prefetch(
link, uid, t);
assert_equals(event,
"timeout");
},
"Prefetch should do nothing with an invalid href");
</
script>
</
body>
