block-cors-preflights.https.html | Explore in Territory

<!doctype html>
<meta charset="utf-8">
<title>Background Fetch API: CORS preflight blocking test</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/serviceworker/resources/test-helpers.js"></script>
<script src="resources/utils.js"></script>
<script>
'use strict';

// Requests that require CORS preflights are temporarily blocked, because the
// browser side of Background Fetch doesn't yet support performing CORS checks
// (crbug.com/711354). This is non-spec-compliant, which is why it is tested
// here instead of in web-platform-tests.

// This is not a comprehensive test of CORS preflight detection - it is just
// intended to check that detection is enabled.

// TODO(crbug.com/1198604): convert to WPT.

backgroundFetchTest((t, bgFetch) => {
  return bgFetch.fetch(uniqueTag(), new Request('https://example.com', {
    method: 'POST',
    headers: {'Content-Type': 'text/plain'}
  }));
}, 'POST and text/plain are whitelisted, so should register ok');

backgroundFetchTest((t, bgFetch) => {
  return bgFetch.fetch(uniqueTag(), new Request(self.origin, {
    method: 'PUT',
    headers: {'Content-Type': 'text/json'}
  }));
}, 'same-origin fetches should register ok');

</script>

chromium/third_party/blink/web_tests/http/tests/background_fetch/block-cors-preflights.https.html