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51 lines
1.8 KiB
HTML
51 lines
1.8 KiB
HTML
<!doctype html>
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<html>
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<head>
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<meta charset="utf-8">
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<title>Request ETag</title>
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<meta name="help" href="https://fetch.spec.whatwg.org/#request">
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<script src="/resources/testharness.js"></script>
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<script src="/resources/testharnessreport.js"></script>
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<script src="/common/utils.js"></script>
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</head>
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<body>
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<script>
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promise_test(function() {
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var cacheBuster = token(); // ensures first request is uncached
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var url = "../resources/cache.py?v=" + cacheBuster;
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var etag;
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// make the first request
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return fetch(url).then(function(response) {
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// ensure we're getting the regular, uncached response
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assert_equals(response.status, 200);
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assert_equals(response.headers.get("X-HTTP-STATUS"), null)
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return response.text(); // consuming the body, just to be safe
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}).then(function(body) {
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// make a second request
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return fetch(url);
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}).then(function(response) {
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// while the server responds with 304 if our browser sent the correct
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// If-None-Match request header, at the JavaScript level this surfaces
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// as 200
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assert_equals(response.status, 200);
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assert_equals(response.headers.get("X-HTTP-STATUS"), "304")
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etag = response.headers.get("ETag")
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return response.text(); // consuming the body, just to be safe
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}).then(function(body) {
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// make a third request, explicitly setting If-None-Match request header
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var headers = { "If-None-Match": etag }
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return fetch(url, { headers: headers })
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}).then(function(response) {
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// 304 now surfaces thanks to the explicit If-None-Match request header
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assert_equals(response.status, 304);
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});
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}, "Testing conditional GET with ETags");
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done();
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</script>
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</body>
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</html>
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