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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/utils.js"></script>
<script src="/preload/resources/preload_helper.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script>
const {HTTPS_REMOTE_ORIGIN} = get_host_info();
function createEchoURL(text, type) {
return `/preload/resources/echo-with-cors.py?type=${
encodeURIComponent(type)}&content=${
encodeURIComponent(text)}&uid=${token()}`
}
const urls = {
image: createEchoURL('<svg xmlns="http://www.w3.org/2000/svg" width="2" height="2" />', 'image/svg+xml'),
font: '/preload/resources/font.ttf?x',
text: createEchoURL('hello', 'text/plain'),
script: createEchoURL('function dummy() { }', 'application/javascript'),
style: createEchoURL('.cls { }', 'text/css'),
}
const resourceTypes = {
image: {url: urls.image, as: 'image'},
font: {url: urls.font, as: 'font', config: 'anonymous'},
backgroundImage: {url: urls.image, as: 'image', config: 'no-cors'},
fetch: {url: urls.text, as: 'fetch'},
script: {url: urls.script, as: 'script'},
module: {url: urls.script, as: 'script'},
style: {url: urls.style, as: 'style'}
}
const configs = {
// The requested URL is from the same origin
'same-origin': {crossOrigin: false, attributes: {}},
// The requested URL is from a remote origin, without CORS
'no-cors': {crossOrigin: true, attributes: {}},
// The requested URL is from a remote origin, with CORS (anonymous)
'anonymous': {crossOrigin: true, attributes: {crossOrigin: 'anonymous'}},
// The requested URL is from a remote origin, with CORS (including credentials)
'use-credentials': {crossOrigin: true, attributes: {crossOrigin: 'use-credentials'}},
}
function preload(attributes, t) {
const link = document.createElement('link');
link.rel = "preload";
Object.entries(attributes).forEach(([key, value]) => {
if (value)
link[key] = value;
});
document.head.appendChild(link);
t.add_cleanup(() => link.remove());
return new Promise(resolve => link.addEventListener('load', resolve));
}
const loaders = {
image: (href, attr, t) => {
const img = document.createElement('img');
Object.entries(attr).forEach(([key, value]) => {
img[key] = value;
});
img.src = href
document.body.appendChild(img);
t.add_cleanup(() => img.remove());
return new Promise(resolve => {
img.addEventListener('load', resolve);
img.addEventListener('error', resolve);
});
},
font: async (href, attr, t) => {
const style = document.createElement('style');
style.innerHTML = `@font-face {
font-family: 'MyFont';
src: url('${href}');
}`;
document.head.appendChild(style);
t.add_cleanup(() => style.remove());
const p = document.createElement('p');
p.style.fontFamily = 'MyFont';
document.body.appendChild(p);
t.add_cleanup(() => p.remove());
await document.fonts.ready;
},
shape: (href, attr, t) => {
const div = document.createElement('div');
div.style.shapeOutside = `url(${href})`;
document.body.appendChild(div);
t.add_cleanup(() => div.remove());
},
backgroundImage: (href, attr, t) => {
const div = document.createElement('div');
div.style.background = `url(${href})`;
document.body.appendChild(div);
t.add_cleanup(() => div.remove());
},
fetch: async (href, attr, t) => {
const options = {mode: attr.crossOrigin ? 'cors' : 'no-cors',
credentials: !attr.crossOrigin || attr.crossOrigin === 'anonymous' ? 'omit' : 'include'}
const response = await fetch(href, options)
await response.text();
},
script: async (href, attr, t) => {
const script = document.createElement('script');
t.add_cleanup(() => script.remove());
if (attr.crossOrigin)
script.setAttribute('crossorigin', attr.crossOrigin);
script.src = href;
document.body.appendChild(script);
await new Promise(resolve => { script.onload = resolve });
},
module: async (href, attr, t) => {
const script = document.createElement('script');
script.type = 'module';
t.add_cleanup(() => script.remove());
if (attr.crossOrigin)
script.setAttribute('crossorigin', attr.crossOrigin);
script.src = href;
document.body.appendChild(script);
await new Promise(resolve => { script.onload = resolve });
},
style: async (href, attr, t) => {
const style = document.createElement('link');
style.rel = 'stylesheet';
style.href = href;
t.add_cleanup(() => style.remove());
if (attr.crossOrigin)
style.setAttribute('crossorigin', attr.crossOrigin);
document.body.appendChild(style);
await new Promise(resolve => style.addEventListener('load', resolve));
}
}
function preload_reuse_test(type, as, url, preloadConfig, resourceConfig) {
const expected = (preloadConfig === resourceConfig) ? "reuse" : "discard";
const key = token();
const href = getAbsoluteURL(`${
(configs[resourceConfig].crossOrigin ? HTTPS_REMOTE_ORIGIN : '') + url
}&${token()}`)
promise_test(async t => {
await preload({href, as, ...configs[preloadConfig].attributes}, t);
await loaders[as](href, configs[resourceConfig].attributes, t);
const expectedEntries = expected === "reuse" ? 1 : 2;
if (numberOfResourceTimingEntries(href) < expectedEntries)
await new Promise(resolve => t.step_timeout(resolve, 300));
verifyNumberOfResourceTimingEntries(href, expectedEntries);
}, `Loading ${type} (${resourceConfig}) with link (${preloadConfig}) should ${expected} the preloaded response`);
}
for (const [resourceTypeName, resourceInfo] of Object.entries(resourceTypes)) {
const configNames = resourceInfo.config ? [resourceInfo.config, 'same-origin'] : Object.keys(configs)
for (const resourceConfigName of configNames) {
for (const preloadConfigName in configs) {
// Same-origin requests ignore their CORS attributes, so no need to match all of them.
if ((resourceConfigName === 'same-origin' && preloadConfigName === 'same-origin') ||
(resourceConfigName !== 'same-origin' && preloadConfigName !== 'same-origin'))
preload_reuse_test(resourceTypeName, resourceInfo.as, resourceInfo.url, preloadConfigName, resourceConfigName);
}
}
}
</script>
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