service worker: Implement NavigationPreloadManager.getState

content/browser/service_worker/service_worker_dispatcher_host.cc

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/browser/service_worker/service_worker_dispatcher_host.h"
 
 #include <utility>
 
 #include "base/debug/crash_logging.h"
 #include "base/logging.h"
@@ skipping 35 matching lines @@
 
 const char kNoDocumentURLErrorMessage[] =
     "No URL is associated with the caller's document.";
 const char kShutdownErrorMessage[] =
     "The Service Worker system has shutdown.";
 const char kUserDeniedPermissionMessage[] =
     "The user denied permission to use Service Worker.";
 const char kInvalidStateErrorMessage[] = "The object is in an invalid state.";
 const char kEnableNavigationPreloadErrorPrefix[] =
     "Failed to enable or disable navigation preload: ";
+const char kGetNavigationPreloadStateErrorPrefix[] =
+    "Failed to get navigation preload state: ";
 
 const uint32_t kFilteredMessageClasses[] = {
     ServiceWorkerMsgStart, EmbeddedWorkerMsgStart,
 };
 
 void RunSoon(const base::Closure& callback) {
   if (!callback.is_null())
     base::ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE, callback);
 }
 
@@ skipping 115 matching lines @@
                         OnIncrementServiceWorkerRefCount)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_DecrementServiceWorkerRefCount,
                         OnDecrementServiceWorkerRefCount)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_IncrementRegistrationRefCount,
                         OnIncrementRegistrationRefCount)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_DecrementRegistrationRefCount,
                         OnDecrementRegistrationRefCount)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_TerminateWorker, OnTerminateWorker)
     IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_EnableNavigationPreload,
                         OnEnableNavigationPreload)
+    IPC_MESSAGE_HANDLER(ServiceWorkerHostMsg_GetNavigationPreloadState,
+                        OnGetNavigationPreloadState)
     IPC_MESSAGE_UNHANDLED(handled = false)
   IPC_END_MESSAGE_MAP()
 
   if (!handled && GetContext()) {
     handled = GetContext()->embedded_worker_registry()->OnMessageReceived(
         message, render_process_id_);
     if (!handled)
       bad_message::ReceivedBadMessage(this, bad_message::SWDH_NOT_HANDLED);
   }
 
@@ skipping 516 matching lines @@
         std::string(kEnableNavigationPreloadErrorPrefix) +
             std::string(kUserDeniedPermissionMessage)));
     return;
   }
 
   // TODO(falken): Write to disk before resolving the promise.
   registration->EnableNavigationPreload(enable);
   Send(new ServiceWorkerMsg_DidEnableNavigationPreload(thread_id, request_id));
 }
 
+void ServiceWorkerDispatcherHost::OnGetNavigationPreloadState(
+    int thread_id,
+    int request_id,
+    int provider_id,
+    int64_t registration_id) {
+  ProviderStatus provider_status;
+  ServiceWorkerProviderHost* provider_host =
+      GetProviderHostForRequest(&provider_status, provider_id);
+  switch (provider_status) {
+    case ProviderStatus::NO_CONTEXT:  // fallthrough
+    case ProviderStatus::DEAD_HOST:
+      Send(new ServiceWorkerMsg_GetNavigationPreloadStateError(
+          thread_id, request_id, WebServiceWorkerError::ErrorTypeAbort,
+          std::string(kGetNavigationPreloadStateErrorPrefix) +
+              std::string(kShutdownErrorMessage)));
+      return;
+    case ProviderStatus::NO_HOST:
+      bad_message::ReceivedBadMessage(
+          this, bad_message::SWDH_GET_NAVIGATION_PRELOAD_STATE_NO_HOST);
+      return;
+    case ProviderStatus::NO_URL:
+      Send(new ServiceWorkerMsg_GetNavigationPreloadStateError(
+          thread_id, request_id, WebServiceWorkerError::ErrorTypeSecurity,
+          std::string(kGetNavigationPreloadStateErrorPrefix) +
+              std::string(kNoDocumentURLErrorMessage)));
+      return;
+    case ProviderStatus::OK:
+      break;
+  }
+
+  ServiceWorkerRegistration* registration =
+      GetContext()->GetLiveRegistration(registration_id);
+  if (!registration) {
+    // |registration| must be alive because a renderer retains a registration
+    // reference at this point.
+    bad_message::ReceivedBadMessage(
+        this, bad_message::SWDH_ENABLE_NAVIGATION_PRELOAD_BAD_REGISTRATION_ID);

[nasko, 2016/10/25 23:23:42]

Shouldn't this be SWDH_GET_NAVIGATION_PRELOAD_STATE_BAD_REGISTRATION_ID?

[falken, 2016/10/25 23:55:58]

Done. Yes more bad copy paste coding.

+    return;
+  }
+
+  std::vector<GURL> urls = {provider_host->document_url(),
+                            registration->pattern()};
+  if (!ServiceWorkerUtils::AllOriginsMatchAndCanAccessServiceWorkers(urls)) {
+    bad_message::ReceivedBadMessage(
+        this, bad_message::SWDH_GET_NAVIGATION_PRELOAD_STATE_INVALID_ORIGIN);
+    return;
+  }
+
+  if (!GetContentClient()->browser()->AllowServiceWorker(
+          registration->pattern(), provider_host->topmost_frame_url(),
+          resource_context_, render_process_id_, provider_host->frame_id())) {
+    Send(new ServiceWorkerMsg_GetNavigationPreloadStateError(
+        thread_id, request_id, WebServiceWorkerError::ErrorTypeDisabled,
+        std::string(kGetNavigationPreloadStateErrorPrefix) +
+            std::string(kUserDeniedPermissionMessage)));
+    return;
+  }
+
+  Send(new ServiceWorkerMsg_DidGetNavigationPreloadState(
+      thread_id, request_id, registration->is_navigation_preload_enabled()));
+}
+
 void ServiceWorkerDispatcherHost::OnPostMessageToWorker(
     int handle_id,
     int provider_id,
     const base::string16& message,
     const url::Origin& source_origin,
     const std::vector<int>& sent_message_ports) {
   TRACE_EVENT0("ServiceWorker",
                "ServiceWorkerDispatcherHost::OnPostMessageToWorker");
   if (!GetContext())
     return;
@@ skipping 773 matching lines @@
   if (!handle) {
     bad_message::ReceivedBadMessage(this,
                                     bad_message::SWDH_TERMINATE_BAD_HANDLE);
     return;
   }
   handle->version()->StopWorker(
       base::Bind(&ServiceWorkerUtils::NoOpStatusCallback));
 }
 
 }  // namespace content