chrome/renderer/content_settings_observer.h

   1 // Copyright (c) 2012 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_CONTENT_SETTINGS_OBSERVER_H_
   6 #define CHROME_RENDERER_CONTENT_SETTINGS_OBSERVER_H_
   7
   8 #include <map>
   9 #include <set>
  10
  11 #include "components/content_settings/core/common/content_settings.h"
  12 #include "components/content_settings/core/common/content_settings_types.h"
  13 #include "content/public/renderer/render_frame_observer.h"
  14 #include "content/public/renderer/render_frame_observer_tracker.h"
  15 #include "third_party/WebKit/public/web/WebContentSettingsClient.h"
  16
  17 class GURL;
  18
  19 namespace blink {
  20 class WebFrame;
  21 class WebSecurityOrigin;
  22 class WebURL;
  23 }
  24
  25 namespace extensions {
  26 class Dispatcher;
  27 class Extension;
  28 }
  29
  30 // Handles blocking content per content settings for each RenderFrame.
  31 class ContentSettingsObserver
  32     : public content::RenderFrameObserver,
  33       public content::RenderFrameObserverTracker<ContentSettingsObserver>,
  34       public blink::WebContentSettingsClient {
  35  public:
  36   // Set |should_whitelist| to true if |render_frame()| contains content that
  37   // should be whitelisted for content settings.
  38   ContentSettingsObserver(content::RenderFrame* render_frame,
  39                           extensions::Dispatcher* extension_dispatcher,
  40                           bool should_whitelist);
  41   ~ContentSettingsObserver() override;
  42
  43   // Sets the content setting rules which back |AllowImage()|, |AllowScript()|,
  44   // and |AllowScriptFromSource()|. |content_setting_rules| must outlive this
  45   // |ContentSettingsObserver|.
  46   void SetContentSettingRules(
  47       const RendererContentSettingRules* content_setting_rules);
  48
  49   bool IsPluginTemporarilyAllowed(const std::string& identifier);
  50
  51   // Sends an IPC notification that the specified content type was blocked.
  52   void DidBlockContentType(ContentSettingsType settings_type);
  53
  54   // Sends an IPC notification that the specified content type was blocked
  55   // with additional metadata.
  56   void DidBlockContentType(ContentSettingsType settings_type,
  57                            const base::string16& details);
  58
  59   // blink::WebContentSettingsClient implementation.
  60   virtual bool allowDatabase(const blink::WebString& name,
  61                              const blink::WebString& display_name,
  62                              unsigned long estimated_size);
  63   virtual void requestFileSystemAccessAsync(
  64       const blink::WebContentSettingCallbacks& callbacks);
  65   virtual bool allowImage(bool enabled_per_settings,
  66                           const blink::WebURL& image_url);
  67   virtual bool allowIndexedDB(const blink::WebString& name,
  68                               const blink::WebSecurityOrigin& origin);
  69   virtual bool allowPlugins(bool enabled_per_settings);
  70   virtual bool allowScript(bool enabled_per_settings);
  71   virtual bool allowScriptFromSource(bool enabled_per_settings,
  72                                      const blink::WebURL& script_url);
  73   virtual bool allowStorage(bool local);
  74   virtual bool allowReadFromClipboard(bool default_value);
  75   virtual bool allowWriteToClipboard(bool default_value);
  76   virtual bool allowMutationEvents(bool default_value);
  77   virtual void didNotAllowPlugins();
  78   virtual void didNotAllowScript();
  79   virtual bool allowDisplayingInsecureContent(
  80       bool allowed_per_settings,
  81       const blink::WebSecurityOrigin& context,
  82       const blink::WebURL& url);
  83   virtual bool allowRunningInsecureContent(
  84       bool allowed_per_settings,
  85       const blink::WebSecurityOrigin& context,
  86       const blink::WebURL& url);
  87
  88   // This is used for cases when the NPAPI plugins malfunction if used.
  89   bool AreNPAPIPluginsBlocked() const;
  90
  91  private:
  92   FRIEND_TEST_ALL_PREFIXES(ContentSettingsObserverTest, WhitelistedSchemes);
  93   FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest,
  94                            ContentSettingsInterstitialPages);
  95   FRIEND_TEST_ALL_PREFIXES(ChromeRenderViewTest, PluginsTemporarilyAllowed);
  96
  97   // RenderFrameObserver implementation.
  98   bool OnMessageReceived(const IPC::Message& message) override;
  99   void DidCommitProvisionalLoad(bool is_new_navigation,
 100                                 bool is_same_page_navigation) override;
 101
 102   // Message handlers.
 103   void OnLoadBlockedPlugins(const std::string& identifier);
 104   void OnSetAsInterstitial();
 105   void OnNPAPINotSupported();
 106   void OnSetAllowDisplayingInsecureContent(bool allow);
 107   void OnSetAllowRunningInsecureContent(bool allow);
 108   void OnReloadFrame();
 109   void OnRequestFileSystemAccessAsyncResponse(int request_id, bool allowed);
 110
 111   // Resets the |content_blocked_| array.
 112   void ClearBlockedContentSettings();
 113
 114   // Whether the observed RenderFrame is for a platform app.
 115   bool IsPlatformApp();
 116
 117 #if defined(ENABLE_EXTENSIONS)
 118   // If |origin| corresponds to an installed extension, returns that extension.
 119   // Otherwise returns NULL.
 120   const extensions::Extension* GetExtension(
 121       const blink::WebSecurityOrigin& origin) const;
 122 #endif
 123
 124   // Helpers.
 125   // True if |render_frame()| contains content that is white-listed for content
 126   // settings.
 127   bool IsWhitelistedForContentSettings() const;
 128   static bool IsWhitelistedForContentSettings(
 129       const blink::WebSecurityOrigin& origin,
 130       const GURL& document_url);
 131
 132 #if defined(ENABLE_EXTENSIONS)
 133   // Owned by ChromeContentRendererClient and outlive us.
 134   extensions::Dispatcher* extension_dispatcher_;
 135 #endif
 136
 137   // Insecure content may be permitted for the duration of this render view.
 138   bool allow_displaying_insecure_content_;
 139   bool allow_running_insecure_content_;
 140
 141   // A pointer to content setting rules stored by the renderer. Normally, the
 142   // |RendererContentSettingRules| object is owned by
 143   // |ChromeRenderProcessObserver|. In the tests it is owned by the caller of
 144   // |SetContentSettingRules|.
 145   const RendererContentSettingRules* content_setting_rules_;
 146
 147   // Stores if images, scripts, and plugins have actually been blocked.
 148   bool content_blocked_[CONTENT_SETTINGS_NUM_TYPES];
 149
 150   // Caches the result of AllowStorage.
 151   typedef std::pair<GURL, bool> StoragePermissionsKey;
 152   std::map<StoragePermissionsKey, bool> cached_storage_permissions_;
 153
 154   // Caches the result of |AllowScript|.
 155   std::map<blink::WebFrame*, bool> cached_script_permissions_;
 156
 157   std::set<std::string> temporarily_allowed_plugins_;
 158   bool is_interstitial_page_;
 159   bool npapi_plugins_blocked_;
 160
 161   int current_request_id_;
 162   typedef std::map<int, blink::WebContentSettingCallbacks> PermissionRequestMap;
 163   PermissionRequestMap permission_requests_;
 164
 165   // If true, IsWhitelistedForContentSettings will always return true.
 166   const bool should_whitelist_;
 167
 168   DISALLOW_COPY_AND_ASSIGN(ContentSettingsObserver);
 169 };
 170
 171 #endif  // CHROME_RENDERER_CONTENT_SETTINGS_OBSERVER_H_