PlzNavigate: detect when a ServiceWorker is present

content/browser/loader/navigation_url_loader_impl_core.cc

Index: content/browser/loader/navigation_url_loader_impl_core.cc
diff --git a/content/browser/loader/navigation_url_loader_impl_core.cc b/content/browser/loader/navigation_url_loader_impl_core.cc
index c7a215d0dd87d8beec3d0d5b948f04ca0193c0be..9ff2adaa78730a6598618aea6ecab356d47add9c 100644
--- a/content/browser/loader/navigation_url_loader_impl_core.cc
+++ b/content/browser/loader/navigation_url_loader_impl_core.cc
@@ -10,7 +10,8 @@
 #include "content/browser/frame_host/navigation_request_info.h"
 #include "content/browser/loader/navigation_resource_handler.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
-#include "content/browser/service_worker/service_worker_navigation_handle_core.h"
+#include "content/browser/service_worker/service_worker_context_wrapper.h"
+#include "content/browser/service_worker/service_worker_registration.h"
 #include "content/common/navigation_params.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/navigation_data.h"
@@ -24,7 +25,9 @@ namespace content {
 NavigationURLLoaderImplCore::NavigationURLLoaderImplCore(
     const base::WeakPtr<NavigationURLLoaderImpl>& loader)
     : loader_(loader),
-      resource_handler_(nullptr) {
+      resource_handler_(nullptr),
+      resource_context_(nullptr),
+      factory_(this) {
   // This object is created on the UI thread but otherwise is accessed and
   // deleted on the IO thread.
   DCHECK_CURRENTLY_ON(BrowserThread::UI);
@@ -39,7 +42,7 @@ NavigationURLLoaderImplCore::~NavigationURLLoaderImplCore() {
 
 void NavigationURLLoaderImplCore::Start(
     ResourceContext* resource_context,
-    ServiceWorkerNavigationHandleCore* service_worker_handle_core,
+    ServiceWorkerContextWrapper* service_worker_context_wrapper,
     std::unique_ptr<NavigationRequestInfo> request_info) {
   DCHECK_CURRENTLY_ON(BrowserThread::IO);
 
@@ -47,11 +50,22 @@ void NavigationURLLoaderImplCore::Start(
       BrowserThread::UI, FROM_HERE,
       base::Bind(&NavigationURLLoaderImpl::NotifyRequestStarted, loader_,
                  base::TimeTicks::Now()));
-
-  // The ResourceDispatcherHostImpl can be null in unit tests.
-  if (ResourceDispatcherHostImpl::Get()) {
+  request_info_ = std::move(request_info);
+  resource_context_ = resource_context;
+
+  // Check if there is a ServiceWorker registered for this navigation if
+  // ServiceWorkers are allowed for this navigation. Otherwise start the
+  // request right away.
+  // ServiceWorkerContextWrapper can be null in tests.
+  if (!request_info_->begin_params.skip_service_worker &&
+      service_worker_context_wrapper) {
+    service_worker_context_wrapper->FindReadyRegistrationForDocument(
+        request_info_->common_params.url,
+        base::Bind(&NavigationURLLoaderImplCore::OnServiceWorkerChecksPerformed,
+                   factory_.GetWeakPtr()));
+  } else {
     ResourceDispatcherHostImpl::Get()->BeginNavigationRequest(
-        resource_context, *request_info, this, service_worker_handle_core);
+        resource_context_, *request_info_, this);
   }
 }
 
@@ -132,4 +146,29 @@ void NavigationURLLoaderImplCore::NotifyRequestFailed(bool in_cache,
                  in_cache, net_error));
 }
 
+void NavigationURLLoaderImplCore::OnServiceWorkerChecksPerformed(
+      ServiceWorkerStatusCode status,
+      const scoped_refptr<ServiceWorkerRegistration>& registration) {
+  DCHECK_CURRENTLY_ON(BrowserThread::IO);
+  // If the navigation has a ServiceWorker, bail out immediately.
+  // TODO(clamy): only bail out when the ServiceWorker has a Fetch event
+  // handler.
+  if (status == SERVICE_WORKER_OK) {
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&NavigationURLLoaderImpl::NotifyServiceWorkerEncountered,
+                   loader_));
+    return;
+  }
+
+  // Otherwise, start the navigation in the network stack.
+
+  // The ResourceDispatcherHostImpl can be null in unit tests.
+  if (!ResourceDispatcherHostImpl::Get())
+    return;
+
+  ResourceDispatcherHostImpl::Get()->BeginNavigationRequest(
+      resource_context_, *request_info_, this);
+}
+
 }  // namespace content