Avoid calling into the ContentBrowserClient interface from ResourceDispatcherHostImpl to determine …

content/browser/loader/resource_dispatcher_host_impl.h

 // Copyright (c) 2012 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.
 
 // This is the browser side of the resource dispatcher, it receives requests
 // from the child process (i.e. [Renderer, Plugin, Worker]ProcessHost), and
 // dispatches them to URLRequests. It then forwards the messages from the
 // URLRequests back to the correct process for handling.
 //
 // See http://dev.chromium.org/developers/design-documents/multi-process-resource-loading
@@ skipping 89 matching lines @@
       RenderFrameHost* root_frame_host);
 
   // Cancels any blocked request for the frame and its subframes.
   static void CancelBlockedRequestsForFrameFromUI(
       RenderFrameHostImpl* root_frame_host);
 
   // ResourceDispatcherHost implementation:
   void SetDelegate(ResourceDispatcherHostDelegate* delegate) override;
   void SetAllowCrossOriginAuthPrompt(bool value) override;
   void ClearLoginDelegateForRequest(net::URLRequest* request) override;
+  void RegisterInterceptor(
+      const std::string& http_header,
+      const std::string& starts_with,
+      const InterceptorCallback& interceptor) override;
 
   // Puts the resource dispatcher host in an inactive state (unable to begin
   // new requests).  Cancels all pending requests.
   void Shutdown();
 
   // Force cancels any pending requests for the given |context|. This is
   // necessary to ensure that before |context| goes away, all requests
   // for it are dead.
   void CancelRequestsForContext(ResourceContext* context);
 
@@ skipping 198 matching lines @@
   struct LoadInfo {
     GURL url;
     net::LoadStateWithParam load_state;
     uint64_t upload_position;
     uint64_t upload_size;
   };
 
   // Map from ProcessID+RouteID pair to the "most interesting" LoadState.
   typedef std::map<GlobalRoutingID, LoadInfo> LoadInfoMap;
 
+  // Information about a HTTP header interceptor.
+  struct HeaderInterceptorInfo {
+    // Structure is sufficiently complicated to require the constructor
+    // destructor definitions in the cc file.
+    HeaderInterceptorInfo();
+    ~HeaderInterceptorInfo();
+    HeaderInterceptorInfo(const HeaderInterceptorInfo& other);
+
+    // Used to prefix match the value of the http header.
+    std::string starts_with;
+    // The interceptor.
+    InterceptorCallback interceptor;
+  };
+
+  // Map from HTTP header to its information HeaderInterceptorInfo.
+  typedef std::map<std::string, HeaderInterceptorInfo> HeaderInterceptorMap;
+
   // ResourceLoaderDelegate implementation:
   ResourceDispatcherHostLoginDelegate* CreateLoginDelegate(
       ResourceLoader* loader,
       net::AuthChallengeInfo* auth_info) override;
   bool HandleExternalProtocol(ResourceLoader* loader, const GURL& url) override;
   void DidStartRequest(ResourceLoader* loader) override;
   void DidReceiveRedirect(ResourceLoader* loader, const GURL& new_url) override;
   void DidReceiveResponse(ResourceLoader* loader) override;
   void DidFinishLoading(ResourceLoader* loader) override;
   std::unique_ptr<net::ClientCertStore> CreateClientCertStore(
@@ skipping 109 matching lines @@
                                 int route_id,
                                 int request_id,
                                 const ResourceRequest& request_data,
                                 LoaderMap::iterator iter);
 
   void BeginRequest(int request_id,
                     const ResourceRequest& request_data,
                     IPC::Message* sync_result,  // only valid for sync
                     int route_id);              // only valid for async
 
+  // There are requests which need decisions to be made like the following:
+  // Whether the presence of certain HTTP headers like the Origin header are
+  // valid, etc. These requests may need to be aborted based on these
+  // decisions which could be time consuming. We allow for these decisions
+  // to be made asynchronously. The request proceeds when we hear back from
+  // the interceptors about whether to continue or not.
+  // The |continue_request| parameter in the function indicates whether the
+  // request should be continued or aborted. The |error_code| parameter is set
+  // if |continue_request| is false.
+  void ContinuePendingBeginRequest(
+      int request_id,
+      const ResourceRequest& request_data,
+      IPC::Message* sync_result,  // only valid for sync
+      int route_id,
+      const net::HttpRequestHeaders& headers,
+      bool continue_request,
+      int error_code);
+
   // Creates a ResourceHandler to be used by BeginRequest() for normal resource
   // loading.
   std::unique_ptr<ResourceHandler> CreateResourceHandler(
       net::URLRequest* request,
       const ResourceRequest& request_data,
       IPC::Message* sync_result,
       int route_id,
       int process_type,
       int child_id,
       ResourceContext* resource_context);
@@ skipping 63 matching lines @@
   // The certificate on a ResourceResponse is associated with a
   // particular renderer process. As a transfer to a new process
   // completes, the stored certificate has to be updated to reflect the
   // new renderer process.
   void UpdateResponseCertificateForTransfer(ResourceResponse* response,
                                             const net::SSLInfo& ssl_info,
                                             int child_id);
 
   CertStore* GetCertStore();
 
+  // This enum holds values which indicate how we want to proceed with a
+  // request that is about to be started.
+  enum BeginRequestStatus {
+    CONTINUE = 0,  // Continue with the request.
+    ABORT = 1,     // Abort.
+    PENDING = 2,   // Wait for the decision to come back.
+    LAST_SERVICE_REQUEST_STATUS = PENDING,
+  };
+
+  // Consults the RendererSecurity policy to determine whether the
+  // ResourceDispatcherHostImpl should service this request.  A request might
+  // be disallowed if the renderer is not authorized to retrieve the request
+  // URL or if the renderer is attempting to upload an unauthorized file.
+  BeginRequestStatus ShouldServiceRequest(
+      int process_type,
+      int child_id,
+      const ResourceRequest& request_data,
+      const net::HttpRequestHeaders& headers,
+      ResourceMessageFilter* filter,
+      ResourceContext* resource_context,
+      OnHeaderProcessedCallback callback);
+
   LoaderMap pending_loaders_;
 
   // Collection of temp files downloaded for child processes via
   // the download_to_file mechanism. We avoid deleting them until
   // the client no longer needs them.
   typedef std::map<int, scoped_refptr<storage::ShareableFileReference> >
       DeletableFilesMap;  // key is request id
   typedef std::map<int, DeletableFilesMap>
       RegisteredTempFiles;  // key is child process id
   RegisteredTempFiles registered_temp_files_;
@@ skipping 74 matching lines @@
   typedef std::map<GlobalRequestID,
                    base::ObserverList<ResourceMessageDelegate>*> DelegateMap;
   DelegateMap delegate_map_;
 
   std::unique_ptr<ResourceScheduler> scheduler_;
 
   // Allows tests to use a mock CertStore. If set, the CertStore must
   // outlive this ResourceDispatcherHostImpl.
   CertStore* cert_store_for_testing_;
 
+  // Used to invoke an interceptor for the HTTP header.
+  HeaderInterceptorMap http_header_interceptor_map_;
+
   DISALLOW_COPY_AND_ASSIGN(ResourceDispatcherHostImpl);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_LOADER_RESOURCE_DISPATCHER_HOST_IMPL_H_