testing/web-platform/tests/loading/early-hints/resources/referrer-policy-test.html

   1 <!DOCTYPE html>
   2 <meta charset=utf-8>
   3 <script src="/resources/testharness.js"></script>
   4 <script src="/resources/testharnessreport.js"></script>
   5 <script src="early-hints-helpers.sub.js"></script>
   6 <body>
   7 <script>
   8 const SEARCH_PARAMS = new URLSearchParams(window.location.search);
   9 const REFERRER_POLICY = SEARCH_PARAMS.get("referrer-policy");
  10
  11 async function get_fetch_timing_and_headers(url_string) {
  12     const url = new URL(url_string);
  13     const id = url.searchParams.get("id");
  14     if (id === null) {
  15         throw new Error(`"${url.href}" does not contain id parameter`);
  16     }
  17     const response = await fetch(`${url.origin}/loading/early-hints/resources/get-fetch-timing-and-headers.h2.py?id=${id}`);
  18     const json = await response.json();
  19     return json;
  20 }
  21
  22 function get_expected_referrer(is_same_origin) {
  23     const full = window.location.href;
  24     const origin = self.origin + "/";
  25     // There is no support for security level related policies such as
  26     // "no-referrer-when-downgrade" since the test is available only on HTTP/2.
  27     switch (REFERRER_POLICY) {
  28         case "no-referrer":
  29             return undefined;
  30         case "origin":
  31             return origin;
  32         case "origin-when-cross-origin":
  33             return is_same_origin ? full : origin;
  34         case "same-origin":
  35             return is_same_origin ? full : undefined;
  36         case "unsafe-url":
  37             return full;
  38         default:
  39             throw new Error(`Unsupported referrer policy: ${REFERRER_POLICY}`);
  40     }
  41 }
  42
  43 async function check_referrer(url, expected_referrer) {
  44     await fetchScript(url);
  45
  46     const { headers } = await get_fetch_timing_and_headers(url);
  47     assert_equals(headers["referer"], expected_referrer);
  48
  49     const name = new URL(url, window.location);
  50     assert_true(isPreloadedByEarlyHints(name));
  51 }
  52
  53 promise_test(async (t) => {
  54     const same_origin_preload_url = SEARCH_PARAMS.get("same-origin-preload-url");
  55     const same_origin_expected = get_expected_referrer(true);
  56     await check_referrer(same_origin_preload_url, same_origin_expected);
  57
  58     const cross_origin_preload_url = SEARCH_PARAMS.get("cross-origin-preload-url");
  59     const cross_origin_expected = get_expected_referrer(false);
  60     await check_referrer(cross_origin_preload_url, cross_origin_expected);
  61 }, `Referrer policy: ${REFERRER_POLICY}`);
  62 </script>
  63 </body>