1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
<!doctype html>
<meta charset="utf-8">
<title>Referrer Policy: popup src="about:blank"</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<meta name="referrer" content="origin">
<body>
<script>
const testFetchClientReferrer =
async_test("The fetch() API in an about:blank popup with the 'client' " +
"referrer is fetched with no 'Referer' header");
const testFetchURLReferrer =
async_test("The fetch() API in an about:blank popup with a custom URL " +
"referrer is fetched with a 'Referer` header that uses the " +
"outer document's URL along with its referrer policy");
const testDocumentReferrer =
async_test("The value of document.referrer in an about:blank popup is the " +
"outer document's full URL, regardless of referrer policy");
const testSubresource =
async_test("A subresource fetched from an about:blank popup is fetched " +
"with no 'Referer' header");
window.addEventListener("message", msg => {
const test_name = msg.data.test;
const referrer = msg.data.referrer;
if (test_name === "testFetchClientReferrer") {
// Because the URL of the document of the popup opened through
// `window.open()` is "about:blank", the stripped URL is no referrer:
// https://w3c.github.io/webappsec-referrer-policy/#strip-url.
testFetchClientReferrer.step_func_done(() => {
assert_equals(referrer, undefined);
})();
} else if (test_name === "testFetchURLReferrer") {
// The "about:blank" popup inherits its opener's referrer policy.
// Note: Setting an explicit URL as referrer is allowed per spec because the
// same-origin check at https://fetch.spec.whatwg.org/#dom-request is done
// against the popup's origin, which inherits the opener document's origin.
testFetchURLReferrer.step_func_done(() => {
assert_equals(referrer, location.origin + '/');
})();
} else if (test_name === "testDocumentReferrer") {
// The referrer of the initial document in an about:blank popup is set to
// its creating document's URL, unredacted by a referrer policy, as per step
// 17 of:
// https://html.spec.whatwg.org/multipage/browsers.html#creating-a-new-browsing-context.
testDocumentReferrer.step_func_done(() => {
assert_equals(referrer, location.href);
})();
} else if (test_name === "testSubresource") {
// Because the URL of the document of the popup is "about:blank", the
// stripped URL is no referrer:
// https://w3c.github.io/webappsec-referrer-policy/#strip-url.
//
// Note: this test is essentially the same as "testFetchClientReferrer" (the
// only difference is that the fetch is not initiated by javascript).
// Compared to the other test, we expect the empty string here instead of
// `undefined` just because of a testing quirk.
testSubresource.step_func_done(() => {
assert_equals(referrer, "");
})();
}
});
const popup = window.open();
const script = popup.document.createElement('script');
script.textContent = `
// Test fetch() API with default "client" referrer.
fetch("${location.origin}/common/security-features/subresource/xhr.py?name=testFetchClientReferrer")
.then(r => r.json())
.then(j => {
opener.postMessage({test: "testFetchClientReferrer", referrer: j.headers.referer}, "*")
}).catch(e => {
opener.postMessage({test: "testFetchClientReferrer", referrer: "FAILURE"}, "*");
});
// Test fetch() API with custom URL referrer.
fetch("${location.origin}/common/security-features/subresource/xhr.py?name=URL",
{referrer: "${location.href}/custom"})
.then(r => r.json())
.then(j => {
opener.postMessage({test: "testFetchURLReferrer", referrer: j.headers.referer}, "*")
}).catch(e => {
opener.postMessage({test: "testFetchURLReferrer", referrer: "FAILURE"}, "*");
});
// Test document.referrer.
opener.postMessage({test: "testDocumentReferrer", referrer: document.referrer}, "*");
// Test a subresource being fetched by the popup.
// This is practicallty the same as the first test: the only difference is
// that here the fetch is not triggered by a javascript fetch function but by
// a script element with a src tag embedded in the html source.
const subresource_script = document.createElement('script');
subresource_script.src = "${location.origin}/common/security-features/subresource/referrer.py";
subresource_script.onload = e => {
opener.postMessage({test: "testSubresource", referrer: window.referrer}, "*");
}
subresource_script.onerror = function(e) {
opener.postMessage({test: "testSubresource", referrer: "FAILURE"}, "*");
};
document.head.appendChild(subresource_script);
`;
popup.document.body.appendChild(script);
</script>
|
