chrome/renderer/net/net_error_helper.h

   1 // Copyright (c) 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
   6 #define CHROME_RENDERER_NET_NET_ERROR_HELPER_H_
   7
   8 #include <string>
   9
  10 #include "base/macros.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/memory/weak_ptr.h"
  13 #include "chrome/renderer/net/net_error_page_controller.h"
  14 #include "components/error_page/common/net_error_info.h"
  15 #include "components/error_page/renderer/net_error_helper_core.h"
  16 #include "content/public/renderer/render_frame_observer.h"
  17 #include "content/public/renderer/render_frame_observer_tracker.h"
  18 #include "content/public/renderer/render_process_observer.h"
  19
  20 class GURL;
  21
  22 namespace blink {
  23 class WebFrame;
  24 class WebURLResponse;
  25 struct WebURLError;
  26 }
  27
  28 namespace content {
  29 class ResourceFetcher;
  30 }
  31
  32 namespace error_page {
  33 struct ErrorPageParams;
  34 }
  35
  36 // Listens for NetErrorInfo messages from the NetErrorTabHelper on the
  37 // browser side and updates the error page with more details (currently, just
  38 // DNS probe results) if/when available.
  39 class NetErrorHelper
  40     : public content::RenderFrameObserver,
  41       public content::RenderFrameObserverTracker<NetErrorHelper>,
  42       public content::RenderProcessObserver,
  43       public error_page::NetErrorHelperCore::Delegate,
  44       public NetErrorPageController::Delegate {
  45  public:
  46   explicit NetErrorHelper(content::RenderFrame* render_view);
  47   ~NetErrorHelper() override;
  48
  49   // NetErrorPageController::Delegate implementation
  50   void ButtonPressed(error_page::NetErrorHelperCore::Button button) override;
  51   void TrackClick(int tracking_id) override;
  52
  53   // RenderFrameObserver implementation.
  54   void DidStartProvisionalLoad() override;
  55   void DidCommitProvisionalLoad(bool is_new_navigation,
  56                                 bool is_same_page_navigation) override;
  57   void DidFinishLoad() override;
  58   void OnStop() override;
  59   void WasShown() override;
  60   void WasHidden() override;
  61
  62   // IPC::Listener implementation.
  63   bool OnMessageReceived(const IPC::Message& message) override;
  64
  65   // RenderProcessObserver implementation.
  66   void NetworkStateChanged(bool online) override;
  67
  68   // Examines |frame| and |error| to see if this is an error worthy of a DNS
  69   // probe.  If it is, initializes |error_strings| based on |error|,
  70   // |is_failed_post|, and |locale| with suitable strings and returns true.
  71   // If not, returns false, in which case the caller should look up error
  72   // strings directly using LocalizedError::GetNavigationErrorStrings.
  73   //
  74   // Updates the NetErrorHelper with the assumption the page will be loaded
  75   // immediately.
  76   void GetErrorHTML(blink::WebFrame* frame,
  77                     const blink::WebURLError& error,
  78                     bool is_failed_post,
  79                     std::string* error_html);
  80
  81   // Returns whether a load for |url| in |frame| should have its error page
  82   // suppressed.
  83   bool ShouldSuppressErrorPage(blink::WebFrame* frame, const GURL& url);
  84
  85  private:
  86   // NetErrorHelperCore::Delegate implementation:
  87   void GenerateLocalizedErrorPage(
  88       const blink::WebURLError& error,
  89       bool is_failed_post,
  90       bool can_use_local_diagnostics_service,
  91       scoped_ptr<error_page::ErrorPageParams> params,
  92       bool* reload_button_shown,
  93       bool* show_saved_copy_button_shown,
  94       bool* show_cached_copy_button_shown,
  95       std::string* html) const override;
  96   void LoadErrorPageInMainFrame(const std::string& html,
  97                                 const GURL& failed_url) override;
  98   void EnablePageHelperFunctions() override;
  99   void UpdateErrorPage(const blink::WebURLError& error,
 100                        bool is_failed_post,
 101                        bool can_use_local_diagnostics_service) override;
 102   void FetchNavigationCorrections(
 103       const GURL& navigation_correction_url,
 104       const std::string& navigation_correction_request_body) override;
 105   void CancelFetchNavigationCorrections() override;
 106   void SendTrackingRequest(const GURL& tracking_url,
 107                            const std::string& tracking_request_body) override;
 108   void ReloadPage() override;
 109   void LoadPageFromCache(const GURL& page_url) override;
 110   void DiagnoseError(const GURL& page_url) override;
 111
 112   void OnNetErrorInfo(int status);
 113   void OnSetCanShowNetworkDiagnosticsDialog(
 114       bool can_use_local_diagnostics_service);
 115   void OnSetNavigationCorrectionInfo(const GURL& navigation_correction_url,
 116                                      const std::string& language,
 117                                      const std::string& country_code,
 118                                      const std::string& api_key,
 119                                      const GURL& search_url);
 120
 121   void OnNavigationCorrectionsFetched(const blink::WebURLResponse& response,
 122                                       const std::string& data);
 123
 124   void OnTrackingRequestComplete(const blink::WebURLResponse& response,
 125                                  const std::string& data);
 126
 127   scoped_ptr<content::ResourceFetcher> correction_fetcher_;
 128   scoped_ptr<content::ResourceFetcher> tracking_fetcher_;
 129
 130   scoped_ptr<error_page::NetErrorHelperCore> core_;
 131
 132   // Weak factory for vending a weak pointer to a NetErrorPageController. Weak
 133   // pointers are invalidated on each commit, to prevent getting messages from
 134   // Controllers used for the previous commit that haven't yet been cleaned up.
 135   base::WeakPtrFactory<NetErrorPageController::Delegate>
 136       weak_controller_delegate_factory_;
 137
 138   DISALLOW_COPY_AND_ASSIGN(NetErrorHelper);
 139 };
 140
 141 #endif  // CHROME_RENDERER_NET_NET_ERROR_HELPER_H_