Bug 1236933 - Return null from FetchEvent.clientId for non-subresource network requests; r=bkelly

dom/workers/ServiceWorkerManager.cpp

@@ -3601,7 +3601,8 @@ ServiceWorkerManager::DispatchFetchEvent(const PrincipalOriginAttributes& aOrigi
 
     internalChannel->GetLoadGroup(getter_AddRefs(loadGroup));
 
-    documentId = aDocumentIdForTopLevelNavigation;
+    // TODO: Use aDocumentIdForTopLevelNavigation for potentialClientId, pending
+    // the spec change.
 
     nsCOMPtr<nsIURI> uri;
     aRv = aChannel->GetSecureUpgradedChannelURI(getter_AddRefs(uri));

dom/workers/ServiceWorkerPrivate.cpp

@@ -1243,7 +1243,9 @@ private:
     init.mRequest.Value() = request;
     init.mBubbles = false;
     init.mCancelable = true;
-    init.mClientId = mClientId;
+    if (!mClientId.IsEmpty()) {
+      init.mClientId = mClientId;
+    }
     init.mIsReload = mIsReload;
     RefPtr<FetchEvent> event =
       FetchEvent::Constructor(globalObj, NS_LITERAL_STRING("fetch"), init, result);

testing/web-platform/mozilla/tests/service-workers/service-worker/clients-get.https.html

@@ -7,9 +7,10 @@
 <script>
 var host_info = get_host_info();
 
-var scope = 'resources/blank.html?clients-get';
+var scope = 'resources/clients-get-frame.html';
 var t = async_test('Test Clients.get()');
 var clientIds = [];
+var frame;
 t.step(function() {
     service_worker_unregister_and_register(
         t, 'resources/clients-get-worker.js', scope)
@@ -20,21 +21,38 @@ t.step(function() {
           return with_iframe(scope + '#1');
         })
       .then(function(frame1) {
-          clientIds.push(frame1.contentDocument.body.textContent);
           frame1.focus();
+          return wait_for_clientId();
+        })
+      .then(function(clientId) {
+          clientIds.push(clientId);
           return with_iframe(scope + '#2');
         })
       .then(function(frame2) {
-          clientIds.push(frame2.contentDocument.body.textContent);
+          frame = frame2;
+          return wait_for_clientId();
+        })
+      .then(function(clientId) {
+          clientIds.push(clientId);
           var channel = new MessageChannel();
           channel.port1.onmessage = t.step_func(on_message);
-          frame2.contentWindow.navigator.serviceWorker.controller.postMessage(
+          frame.contentWindow.navigator.serviceWorker.controller.postMessage(
               {port:channel.port2, clientIds:clientIds,
                message: 'get_client_ids'}, [channel.port2]);
         })
       .catch(unreached_rejection(t));
   });
 
+function wait_for_clientId() {
+  return new Promise(function(resolve, reject) {
+      function get_client_id(e) {
+        window.removeEventListener("message", get_client_id);
+        resolve(e.data.clientId);
+      }
+      window.addEventListener("message", get_client_id, false);
+    });
+}
+
 var expected = [
     /* visibilityState, focused, url, frameType */
     ['visible', true, new URL(scope + '#1', location).toString(), 'nested'],

testing/web-platform/mozilla/tests/service-workers/service-worker/fetch-event.https.html

@@ -71,7 +71,6 @@ async_test(function(t) {
 async_test(function(t) {
     var scope = 'resources/simple.html?clientId';
     var frame;
-    var initial_client_id;
     service_worker_unregister_and_register(t, worker, scope)
       .then(function(reg) {
           return wait_for_state(t, reg.installing, 'activated');
@@ -80,10 +79,9 @@ async_test(function(t) {
       .then(function(f) {
           frame = f;
           assert_equals(
-            frame.contentDocument.body.textContent.substr(0, 15),
-            'Client ID Found',
+            frame.contentDocument.body.textContent,
+            'Client ID Not Found',
             'Service Worker should respond to fetch with a client id');
-          initial_client_id = frame.contentDocument.body.textContent.substr(17);
           return frame.contentWindow.fetch('resources/other.html?clientId');
         })
       .then(function(response) { return response.text(); })
@@ -93,10 +91,6 @@ async_test(function(t) {
             response_text.substr(0, 15),
             'Client ID Found',
             'Service Worker should respond to fetch with an existing client id');
-          assert_equals(
-            initial_client_id,
-            new_client_id,
-            'Service Worker should observe the correct client ID for a controlled document');
           frame.remove();
           return service_worker_unregister_and_done(t, scope);
         })

testing/web-platform/mozilla/tests/service-workers/service-worker/resources/clients-get-frame.html

@@ -0,0 +1,12 @@
+<!DOCTYPE html>
+<script>
+
+  fetch("clientId")
+    .then(function(response) {
+        return response.text();
+      })
+    .then(function(text) {
+        parent.postMessage({clientId: text}, "*");
+      });
+
+</script>

testing/web-platform/mozilla/tests/service-workers/service-worker/resources/clients-get-worker.js

@@ -1,4 +1,12 @@
 self.onfetch = function(e) {
+  if (e.request.url.indexOf("clients-get-frame.html") >= 0) {
+    if (e.clientId === null) {
+      e.respondWith(fetch(e.request));
+    } else {
+      e.respondWith(Response.error());
+    }
+    return;
+  }
   e.respondWith(new Response(e.clientId));
 };
 

testing/web-platform/mozilla/tests/service-workers/service-worker/resources/fetch-event-test-worker.js

@@ -13,7 +13,7 @@ function handleReferrer(event) {
 
 function handleClientId(event) {
   var body;
-  if (event.clientId !== '') {
+  if (event.clientId !== null) {
     body = 'Client ID Found: ' + event.clientId;
   } else {
     body = 'Client ID Not Found';