access-control-preflight-async-header-denied.htm

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This WPT test may be referenced by the following Test IDs:
- /xhr/access-control-preflight-async-header-denied.htm - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>Async 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;

    async_test((test) => {

      let xhr = new XMLHttpRequest;

      xhr.open("GET", url + "&command=reset", false);

      xhr.send();

      xhr = new XMLHttpRequest;

      xhr.open("GET", url + "&command=header", true);

      xhr.setRequestHeader("x-test", "foo");

      xhr.onload = test.unreached_func(

          "Cross-domain access with custom header allowed without throwing exception");

      xhr.onerror = test.step_func_done(() => {

        xhr = new XMLHttpRequest;

        xhr.open("GET", url + "&command=complete", false);

        xhr.send();

        assert_equals(xhr.responseText, "Request successfully blocked.");

});

      xhr.send();

    }, "Async request denied at preflight");

    </script>

  </body>

</html>