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const params = new URLSearchParams(location.search);
// Take a key used for storing a test result in the server.
const key = params.get('key');
// Take a target hint to decide a target context for prerendering.
const rule_extras = {'target_hint': getTargetHint()};
// Speculation rules injection is blocked in the csp-script-src 'self' test.
const block = location.pathname.endsWith('csp-script-src-self.html');
// The main test page (csp-script-src-*.html) in the parent directory) will load
// this page only with the "key" parameter. This page will then try prerendering
// itself with the "run-test" parameter. When "run-test" is in the URL we'll
// actually start the test process and record the results to send back to the
// main test page. We do this because the main test page cannot navigate itself
// but it also cannot open a popup to a prerendered browsing context so the
// prerender triggering and activation must both happen in this popup.
const run_test = params.has('run-test');
if (!run_test) {
// Generate a new stash key so we can communicate with the prerendered page
// about when to close the popup.
const done_key = token();
const url = new URL(document.URL);
url.searchParams.append('run-test', '');
url.searchParams.append('done-key', done_key);
if (block) {
// Observe `securitypolicyviolation` event that will be triggered by
// startPrerendering().
document.addEventListener('securitypolicyviolation', e => {
if (e.effectiveDirective != 'script-src' &&
e.effectiveDirective != 'script-src-elem') {
const message = 'unexpected effective directive: ' + e.effectiveDirective;
writeValueToServer(key, message).then(() => { window.close(); });
} else {
const message = 'blocked by ' + e.effectiveDirective;
writeValueToServer(key, message).then(() => { window.close(); });
}
});
}
startPrerendering(url.toString(), rule_extras);
// Wait until the prerendered page signals us it's ready to close.
nextValueFromServer(done_key).then(() => {
window.close();
});
} else {
if (block) {
writeValueToServer(key, 'unexpected prerendering');
} else {
// Tell the harness the initial document.prerendering value.
writeValueToServer(key, document.prerendering);
// Tell the prerendering initiating page test being finished.
const done_key = params.get('done-key');
writeValueToServer(done_key, "done");
}
}