Network service: SafeBrowsing check for frame-resources from browser.

content/common/throttling_url_loader.cc

 // Copyright 2017 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/common/throttling_url_loader.h"
 
 #include "base/single_thread_task_runner.h"
 
 namespace content {
 
 ThrottlingURLLoader::StartInfo::StartInfo(
     mojom::URLLoaderFactory* in_url_loader_factory,
     int32_t in_routing_id,
     int32_t in_request_id,
     uint32_t in_options,
-    std::unique_ptr<ResourceRequest> in_url_request,
+    StartLoaderCallback in_start_loader_callback,
+    const ResourceRequest& in_url_request,
     scoped_refptr<base::SingleThreadTaskRunner> in_task_runner)
     : url_loader_factory(in_url_loader_factory),
       routing_id(in_routing_id),
       request_id(in_request_id),
       options(in_options),
-      url_request(std::move(in_url_request)),
+      start_loader_callback(std::move(in_start_loader_callback)),
+      url_request(in_url_request),
       task_runner(std::move(in_task_runner)) {}
 
 ThrottlingURLLoader::StartInfo::~StartInfo() = default;
 
 ThrottlingURLLoader::ResponseInfo::ResponseInfo(
     const ResourceResponseHead& in_response_head,
     const base::Optional<net::SSLInfo>& in_ssl_info,
     mojom::DownloadedTempFilePtr in_downloaded_file)
     : response_head(in_response_head),
       ssl_info(in_ssl_info),
@@ skipping 15 matching lines @@
 
 ThrottlingURLLoader::PriorityInfo::~PriorityInfo() = default;
 
 // static
 std::unique_ptr<ThrottlingURLLoader> ThrottlingURLLoader::CreateLoaderAndStart(
     mojom::URLLoaderFactory* factory,
     std::vector<std::unique_ptr<URLLoaderThrottle>> throttles,
     int32_t routing_id,
     int32_t request_id,
     uint32_t options,
-    std::unique_ptr<ResourceRequest> url_request,
+    const ResourceRequest& url_request,
     mojom::URLLoaderClient* client,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
   std::unique_ptr<ThrottlingURLLoader> loader(
       new ThrottlingURLLoader(std::move(throttles), client));
-  loader->Start(factory, routing_id, request_id, options,
-                std::move(url_request), std::move(task_runner));
+  loader->Start(factory, routing_id, request_id, options, StartLoaderCallback(),
+                url_request, std::move(task_runner));
   return loader;
 }
 
+// static
+std::unique_ptr<ThrottlingURLLoader> ThrottlingURLLoader::CreateLoaderAndStart(
+    StartLoaderCallback start_loader_callback,
+    std::vector<std::unique_ptr<URLLoaderThrottle>> throttles,
+    const ResourceRequest& url_request,
+    mojom::URLLoaderClient* client,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
+  std::unique_ptr<ThrottlingURLLoader> loader(
+      new ThrottlingURLLoader(std::move(throttles), client));
+  loader->Start(nullptr, 0, 0, mojom::kURLLoadOptionNone,
+                std::move(start_loader_callback), url_request,
+                std::move(task_runner));
+  return loader;
+}
+
 ThrottlingURLLoader::~ThrottlingURLLoader() {}
 
 void ThrottlingURLLoader::FollowRedirect() {
   if (url_loader_)
     url_loader_->FollowRedirect();
 }
 
 void ThrottlingURLLoader::SetPriority(net::RequestPriority priority,
                                       int32_t intra_priority_value) {
   if (!url_loader_ && !cancelled_by_throttle_) {
@@ skipping 17 matching lines @@
     throttle_ = std::move(throttles[0]);
     throttle_->set_delegate(this);
   }
 }
 
 void ThrottlingURLLoader::Start(
     mojom::URLLoaderFactory* factory,
     int32_t routing_id,
     int32_t request_id,
     uint32_t options,
-    std::unique_ptr<ResourceRequest> url_request,
+    StartLoaderCallback start_loader_callback,
+    const ResourceRequest& url_request,
     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
   DCHECK_EQ(DEFERRED_NONE, deferred_stage_);
   DCHECK(!cancelled_by_throttle_);
 
   if (throttle_) {
     bool deferred = false;
-    throttle_->WillStartRequest(url_request->url, url_request->load_flags,
-                                url_request->resource_type, &deferred);
+    throttle_->WillStartRequest(url_request.url, url_request.load_flags,
+                                url_request.resource_type, &deferred);
     if (cancelled_by_throttle_)
       return;
 
     if (deferred) {
       deferred_stage_ = DEFERRED_START;
-      start_info_ = base::MakeUnique<StartInfo>(factory, routing_id, request_id,
-                                                options, std::move(url_request),
-                                                std::move(task_runner));
+      start_info_ =
+          base::MakeUnique<StartInfo>(factory, routing_id, request_id, options,
+                                      std::move(start_loader_callback),
+                                      url_request, std::move(task_runner));
       return;
     }
   }
 
+  StartNow(factory, routing_id, request_id, options,
+           std::move(start_loader_callback), url_request,
+           std::move(task_runner));
+}
+
+void ThrottlingURLLoader::StartNow(
+    mojom::URLLoaderFactory* factory,
+    int32_t routing_id,
+    int32_t request_id,
+    uint32_t options,
+    StartLoaderCallback start_loader_callback,
+    const ResourceRequest& url_request,
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
   mojom::URLLoaderClientPtr client;
   client_binding_.Bind(mojo::MakeRequest(&client), std::move(task_runner));
-  factory->CreateLoaderAndStart(mojo::MakeRequest(&url_loader_), routing_id,
-                                request_id, options, *url_request,
-                                std::move(client));
+
+  if (factory) {
+    DCHECK(!start_loader_callback);
+
+    mojom::URLLoaderAssociatedPtr url_loader;
+    auto url_loader_request = mojo::MakeRequest(&url_loader);
+    url_loader_ = std::move(url_loader);
+    factory->CreateLoaderAndStart(std::move(url_loader_request), routing_id,
+                                  request_id, options, url_request,
+                                  std::move(client));
+  } else {
+    mojom::URLLoaderPtr url_loader;
+    auto url_loader_request = mojo::MakeRequest(&url_loader);
+    url_loader_ = std::move(url_loader);
+    std::move(start_loader_callback)
+        .Run(std::move(url_loader_request), std::move(client));
+  }
 }
 
 void ThrottlingURLLoader::OnReceiveResponse(
     const ResourceResponseHead& response_head,
     const base::Optional<net::SSLInfo>& ssl_info,
     mojom::DownloadedTempFilePtr downloaded_file) {
   DCHECK_EQ(DEFERRED_NONE, deferred_stage_);
   DCHECK(!cancelled_by_throttle_);
 
   if (throttle_) {
@@ skipping 96 matching lines @@
     return;
 
   cancelled_by_throttle_ = true;
 
   ResourceRequestCompletionStatus request_complete_data;
   request_complete_data.error_code = error_code;
   request_complete_data.completion_time = base::TimeTicks::Now();
 
   deferred_stage_ = DEFERRED_NONE;
   client_binding_.Close();
-  url_loader_.reset();
+  url_loader_ = nullptr;
 
   forwarding_client_->OnComplete(request_complete_data);
 }
 
 void ThrottlingURLLoader::Resume() {
   if (cancelled_by_throttle_ || deferred_stage_ == DEFERRED_NONE)
     return;
 
   switch (deferred_stage_) {
     case DEFERRED_START: {
-      mojom::URLLoaderClientPtr client;
-      client_binding_.Bind(
-          mojo::MakeRequest(&client), std::move(start_info_->task_runner));
-      start_info_->url_loader_factory->CreateLoaderAndStart(
-          mojo::MakeRequest(&url_loader_), start_info_->routing_id,
-          start_info_->request_id, start_info_->options,
-          *start_info_->url_request, std::move(client));
+      StartNow(start_info_->url_loader_factory, start_info_->routing_id,
+               start_info_->request_id, start_info_->options,
+               std::move(start_info_->start_loader_callback),
+               start_info_->url_request, std::move(start_info_->task_runner));
 
       if (priority_info_) {
         auto priority_info = std::move(priority_info_);
         url_loader_->SetPriority(priority_info->priority,
                                  priority_info->intra_priority_value);
       }
       break;
     }
     case DEFERRED_REDIRECT: {
       client_binding_.ResumeIncomingMethodCallProcessing();
       forwarding_client_->OnReceiveRedirect(redirect_info_->redirect_info,
                                             redirect_info_->response_head);
       break;
     }
     case DEFERRED_RESPONSE: {
       client_binding_.ResumeIncomingMethodCallProcessing();
       forwarding_client_->OnReceiveResponse(
           response_info_->response_head, response_info_->ssl_info,
           std::move(response_info_->downloaded_file));
       break;
     }
     default:
       NOTREACHED();
       break;
   }
   deferred_stage_ = DEFERRED_NONE;
 }
 
 }  // namespace content