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<!DOCTYPE html>
<html>
<head>
<title>Sync request denied at preflight because of non-CORS-safelisted header</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/common/get-host-info.sub.js"></script>
<script src="/common/utils.js"></script>
</head>
<body>
<script type="text/javascript">
const uuid = token();
const url = get_host_info().HTTP_REMOTE_ORIGIN +
"/xhr/resources/access-control-preflight-denied.py?token=" + uuid;
test(() => {
let xhr = new XMLHttpRequest;
xhr.open("GET", url + "&command=reset", false);
xhr.send();
xhr = new XMLHttpRequest;
xhr.open("GET", url + "&command=header", false);
xhr.setRequestHeader("x-test", "foo");
assert_throws_dom("NetworkError", () => xhr.send());
xhr = new XMLHttpRequest;
xhr.open("GET", url + "&command=complete", false);
xhr.send();
assert_equals(xhr.responseText, "Request successfully blocked.");
}, "Sync request denied at preflight");
</script>
</body>
</html>
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