Set "Service-Worker-Navigation-Preload" header

content/browser/service_worker/service_worker_fetch_dispatcher.cc

 // Copyright 2014 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_fetch_dispatcher.h"
 
 #include <string>
 #include <utility>
 
 #include "base/bind.h"
 #include "base/feature_list.h"
 #include "base/memory/ptr_util.h"
 #include "base/time/time.h"
 #include "base/trace_event/trace_event.h"
 #include "content/browser/loader/resource_dispatcher_host_impl.h"
 #include "content/browser/loader/resource_message_filter.h"
 #include "content/browser/loader/resource_request_info_impl.h"
 #include "content/browser/loader/url_loader_factory_impl.h"
 #include "content/browser/service_worker/embedded_worker_status.h"
 #include "content/browser/service_worker/service_worker_version.h"
 #include "content/common/service_worker/fetch_event_dispatcher.mojom.h"
 #include "content/common/service_worker/service_worker_messages.h"
 #include "content/common/service_worker/service_worker_status_code.h"
 #include "content/common/service_worker/service_worker_types.h"
 #include "content/common/service_worker/service_worker_utils.h"
 #include "content/public/common/browser_side_navigation_policy.h"
 #include "content/public/common/content_features.h"
 #include "mojo/public/cpp/bindings/associated_binding.h"
 #include "mojo/public/cpp/bindings/binding.h"
+#include "net/http/http_util.h"
 #include "net/log/net_log.h"
 #include "net/log/net_log_capture_mode.h"
 #include "net/log/net_log_event_type.h"
 #include "net/url_request/url_request.h"
 
 namespace content {
 
 namespace {
 
 // This class wraps a mojo::AssociatedInterfacePtr<URLLoader>. It also is a
@@ skipping 349 matching lines @@
   request.load_flags = original_request->load_flags();
   // Set to SUB_RESOURCE because we shouldn't trigger NavigationResourceThrottle
   // for the service worker navigation preload request.
   request.resource_type = RESOURCE_TYPE_SUB_RESOURCE;
   request.priority = original_request->priority();
   request.skip_service_worker = SkipServiceWorker::ALL;
   request.do_not_prompt_for_login = true;
   request.render_frame_id = original_info->GetRenderFrameID();
   request.is_main_frame = original_info->IsMainFrame();
   request.parent_is_main_frame = original_info->ParentIsMainFrame();
+
+  DCHECK(net::HttpUtil::IsValidHeaderValue(
+      version_->navigation_preload_state().header));
+  request.headers = "Service-Worker-Navigation-Preload: " +
+                    version_->navigation_preload_state().header;
+
   const int request_id = ResourceDispatcherHostImpl::Get()->MakeRequestID();
   DCHECK_LT(request_id, -1);
 
   preload_handle_ = mojom::FetchEventPreloadHandle::New();
   mojom::URLLoaderClientPtr url_loader_client_ptr;
   preload_handle_->url_loader_client_request =
       mojo::GetProxy(&url_loader_client_ptr);
   auto url_loader_client = base::MakeUnique<DelegatingURLLoaderClient>(
       std::move(url_loader_client_ptr));
   mojom::URLLoaderClientAssociatedPtrInfo url_loader_client_associated_ptr_info;
   url_loader_client->Bind(&url_loader_client_associated_ptr_info,
                           url_loader_factory_.associated_group());
   mojom::URLLoaderAssociatedPtr url_loader_associated_ptr;
 
-  // TODO(horo): Add "Service-Worker-Navigation-Preload" header.
-  // See: https://github.com/w3c/ServiceWorker/issues/920#issuecomment-251150270
   url_loader_factory_->CreateLoaderAndStart(
       mojo::GetProxy(&url_loader_associated_ptr,
                      url_loader_factory_.associated_group()),
       original_info->GetRouteID(), request_id, request,
       std::move(url_loader_client_associated_ptr_info));
 
   std::unique_ptr<DelegatingURLLoader> url_loader(
       new DelegatingURLLoader(std::move(url_loader_associated_ptr)));
   preload_handle_->url_loader = url_loader->CreateInterfacePtrAndBind();
   url_loader_ = std::move(url_loader);
   url_loader_client_ = std::move(url_loader_client);
 }
 
 ServiceWorkerMetrics::EventType ServiceWorkerFetchDispatcher::GetEventType()
     const {
   if (request_->fetch_type == ServiceWorkerFetchType::FOREIGN_FETCH)
     return ServiceWorkerMetrics::EventType::FOREIGN_FETCH;
   return ResourceTypeToEventType(resource_type_);
 }
 
 }  // namespace content