extensions/renderer/dispatcher.h

   1 // Copyright 2014 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 EXTENSIONS_RENDERER_DISPATCHER_H_
   6 #define EXTENSIONS_RENDERER_DISPATCHER_H_
   7
   8 #include <map>
   9 #include <set>
  10 #include <string>
  11 #include <utility>
  12 #include <vector>
  13
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/scoped_observer.h"
  16 #include "base/timer/timer.h"
  17 #include "content/public/renderer/render_process_observer.h"
  18 #include "extensions/common/event_filter.h"
  19 #include "extensions/common/extension.h"
  20 #include "extensions/common/extension_set.h"
  21 #include "extensions/common/extensions_client.h"
  22 #include "extensions/common/features/feature.h"
  23 #include "extensions/renderer/resource_bundle_source_map.h"
  24 #include "extensions/renderer/script_context.h"
  25 #include "extensions/renderer/script_context_set.h"
  26 #include "extensions/renderer/user_script_set_manager.h"
  27 #include "extensions/renderer/v8_schema_registry.h"
  28 #include "third_party/WebKit/public/platform/WebString.h"
  29 #include "third_party/WebKit/public/platform/WebVector.h"
  30 #include "v8/include/v8.h"
  31
  32 class ChromeRenderViewTest;
  33 class GURL;
  34 class ModuleSystem;
  35 class URLPattern;
  36 struct ExtensionMsg_ExternalConnectionInfo;
  37 struct ExtensionMsg_Loaded_Params;
  38 struct ExtensionMsg_TabConnectionInfo;
  39 struct ExtensionMsg_UpdatePermissions_Params;
  40
  41 namespace blink {
  42 class WebFrame;
  43 class WebLocalFrame;
  44 class WebSecurityOrigin;
  45 }
  46
  47 namespace base {
  48 class ListValue;
  49 }
  50
  51 namespace content {
  52 class RenderThread;
  53 }
  54
  55 namespace extensions {
  56 class ContentWatcher;
  57 class DispatcherDelegate;
  58 class FilteredEventRouter;
  59 class ManifestPermissionSet;
  60 class RequestSender;
  61 class ScriptContext;
  62 class ScriptInjectionManager;
  63 struct Message;
  64
  65 // Dispatches extension control messages sent to the renderer and stores
  66 // renderer extension related state.
  67 class Dispatcher : public content::RenderProcessObserver,
  68                    public UserScriptSetManager::Observer {
  69  public:
  70   explicit Dispatcher(DispatcherDelegate* delegate);
  71   ~Dispatcher() override;
  72
  73   const std::set<std::string>& function_names() const {
  74     return function_names_;
  75   }
  76
  77   const ExtensionSet* extensions() const { return &extensions_; }
  78
  79   const ScriptContextSet& script_context_set() const {
  80     return *script_context_set_;
  81   }
  82
  83   V8SchemaRegistry* v8_schema_registry() { return v8_schema_registry_.get(); }
  84
  85   ContentWatcher* content_watcher() { return content_watcher_.get(); }
  86
  87   RequestSender* request_sender() { return request_sender_.get(); }
  88
  89   void OnRenderViewCreated(content::RenderView* render_view);
  90
  91   bool IsExtensionActive(const std::string& extension_id) const;
  92
  93   void DidCreateScriptContext(blink::WebLocalFrame* frame,
  94                               const v8::Handle<v8::Context>& context,
  95                               int extension_group,
  96                               int world_id);
  97
  98   void WillReleaseScriptContext(blink::WebLocalFrame* frame,
  99                                 const v8::Handle<v8::Context>& context,
 100                                 int world_id);
 101
 102   void DidCreateDocumentElement(blink::WebFrame* frame);
 103
 104   void DidMatchCSS(
 105       blink::WebFrame* frame,
 106       const blink::WebVector<blink::WebString>& newly_matching_selectors,
 107       const blink::WebVector<blink::WebString>& stopped_matching_selectors);
 108
 109   void OnExtensionResponse(int request_id,
 110                            bool success,
 111                            const base::ListValue& response,
 112                            const std::string& error);
 113
 114   // Checks that the current context contains an extension that has permission
 115   // to execute the specified function. If it does not, a v8 exception is thrown
 116   // and the method returns false. Otherwise returns true.
 117   bool CheckContextAccessToExtensionAPI(const std::string& function_name,
 118                                         ScriptContext* context) const;
 119
 120   // Dispatches the event named |event_name| to all render views.
 121   void DispatchEvent(const std::string& extension_id,
 122                      const std::string& event_name) const;
 123
 124   // Shared implementation of the various MessageInvoke IPCs.
 125   void InvokeModuleSystemMethod(content::RenderView* render_view,
 126                                 const std::string& extension_id,
 127                                 const std::string& module_name,
 128                                 const std::string& function_name,
 129                                 const base::ListValue& args,
 130                                 bool user_gesture);
 131
 132   void ClearPortData(int port_id);
 133
 134   // Returns a list of (module name, resource id) pairs for the JS modules to
 135   // add to the source map.
 136   static std::vector<std::pair<std::string, int> > GetJsResources();
 137   static void RegisterNativeHandlers(ModuleSystem* module_system,
 138                                      ScriptContext* context,
 139                                      Dispatcher* dispatcher,
 140                                      RequestSender* request_sender,
 141                                      V8SchemaRegistry* v8_schema_registry);
 142
 143   bool WasWebRequestUsedBySomeExtensions() const { return webrequest_used_; }
 144
 145  private:
 146   friend class ::ChromeRenderViewTest;
 147   FRIEND_TEST_ALL_PREFIXES(RendererPermissionsPolicyDelegateTest,
 148                            CannotScriptWebstore);
 149
 150   // RenderProcessObserver implementation:
 151   bool OnControlMessageReceived(const IPC::Message& message) override;
 152   void WebKitInitialized() override;
 153   void IdleNotification() override;
 154   void OnRenderProcessShutdown() override;
 155
 156   void OnActivateExtension(const std::string& extension_id);
 157   void OnCancelSuspend(const std::string& extension_id);
 158   void OnDeliverMessage(int target_port_id, const Message& message);
 159   void OnDispatchOnConnect(int target_port_id,
 160                            const std::string& channel_name,
 161                            const ExtensionMsg_TabConnectionInfo& source,
 162                            const ExtensionMsg_ExternalConnectionInfo& info,
 163                            const std::string& tls_channel_id);
 164   void OnDispatchOnDisconnect(int port_id, const std::string& error_message);
 165   void OnLoaded(
 166       const std::vector<ExtensionMsg_Loaded_Params>& loaded_extensions);
 167   void OnLoadedInternal(scoped_refptr<const Extension> extension);
 168   void OnMessageInvoke(const std::string& extension_id,
 169                        const std::string& module_name,
 170                        const std::string& function_name,
 171                        const base::ListValue& args,
 172                        bool user_gesture);
 173   void OnSetChannel(int channel);
 174   void OnSetFunctionNames(const std::vector<std::string>& names);
 175   void OnSetScriptingWhitelist(
 176       const ExtensionsClient::ScriptingWhitelist& extension_ids);
 177   void OnSetSystemFont(const std::string& font_family,
 178                        const std::string& font_size);
 179   void OnShouldSuspend(const std::string& extension_id, uint64 sequence_id);
 180   void OnSuspend(const std::string& extension_id);
 181   void OnTransferBlobs(const std::vector<std::string>& blob_uuids);
 182   void OnUnloaded(const std::string& id);
 183   void OnUpdatePermissions(const ExtensionMsg_UpdatePermissions_Params& params);
 184   void OnUpdateTabSpecificPermissions(const GURL& visible_url,
 185                                       const std::string& extension_id,
 186                                       const URLPatternSet& new_hosts,
 187                                       bool update_origin_whitelist,
 188                                       int tab_id);
 189   void OnClearTabSpecificPermissions(
 190       const std::vector<std::string>& extension_ids,
 191       bool update_origin_whitelist,
 192       int tab_id);
 193   void OnUsingWebRequestAPI(bool webrequest_used);
 194
 195   // UserScriptSetManager::Observer implementation.
 196   void OnUserScriptsUpdated(const std::set<HostID>& changed_hosts,
 197                             const std::vector<UserScript*>& scripts) override;
 198
 199   void UpdateActiveExtensions();
 200
 201   // Sets up the host permissions for |extension|.
 202   void InitOriginPermissions(const Extension* extension);
 203
 204   // Updates the host permissions for the extension url to include only those in
 205   // |new_patterns|, and remove from |old_patterns| that are no longer allowed.
 206   void UpdateOriginPermissions(const GURL& extension_url,
 207                                const URLPatternSet& old_patterns,
 208                                const URLPatternSet& new_patterns);
 209
 210   // Enable custom element whitelist in Apps.
 211   void EnableCustomElementWhiteList();
 212
 213   // Adds or removes bindings for every context belonging to |extension_id|, or
 214   // or all contexts if |extension_id| is empty.
 215   void UpdateBindings(const std::string& extension_id);
 216
 217   void UpdateBindingsForContext(ScriptContext* context);
 218
 219   void RegisterBinding(const std::string& api_name, ScriptContext* context);
 220
 221   void RegisterNativeHandlers(ModuleSystem* module_system,
 222                               ScriptContext* context);
 223
 224   // Determines if a ScriptContext can connect to any externally_connectable-
 225   // enabled extension.
 226   bool IsRuntimeAvailableToContext(ScriptContext* context);
 227
 228   // Updates a web page context with any content capabilities granted by active
 229   // extensions.
 230   void UpdateContentCapabilities(ScriptContext* context);
 231
 232   // Inserts static source code into |source_map_|.
 233   void PopulateSourceMap();
 234
 235   // Returns whether the current renderer hosts a platform app.
 236   bool IsWithinPlatformApp();
 237
 238   // Gets |field| from |object| or creates it as an empty object if it doesn't
 239   // exist.
 240   v8::Handle<v8::Object> GetOrCreateObject(const v8::Handle<v8::Object>& object,
 241                                            const std::string& field,
 242                                            v8::Isolate* isolate);
 243
 244   v8::Handle<v8::Object> GetOrCreateBindObjectIfAvailable(
 245       const std::string& api_name,
 246       std::string* bind_name,
 247       ScriptContext* context);
 248
 249   // Requires the GuestView modules in the module system of the ScriptContext
 250   // |context|.
 251   void RequireGuestViewModules(ScriptContext* context);
 252
 253   // The delegate for this dispatcher. Not owned, but must extend beyond the
 254   // Dispatcher's own lifetime.
 255   DispatcherDelegate* delegate_;
 256
 257   // True if the IdleNotification timer should be set.
 258   bool set_idle_notifications_;
 259
 260   // Contains all loaded extensions.  This is essentially the renderer
 261   // counterpart to ExtensionService in the browser. It contains information
 262   // about all extensions currently loaded by the browser.
 263   ExtensionSet extensions_;
 264
 265   // The IDs of extensions that failed to load, mapped to the error message
 266   // generated on failure.
 267   std::map<std::string, std::string> extension_load_errors_;
 268
 269   // All the bindings contexts that are currently loaded for this renderer.
 270   // There is zero or one for each v8 context.
 271   scoped_ptr<ScriptContextSet> script_context_set_;
 272
 273   scoped_ptr<ContentWatcher> content_watcher_;
 274
 275   scoped_ptr<UserScriptSetManager> user_script_set_manager_;
 276
 277   scoped_ptr<ScriptInjectionManager> script_injection_manager_;
 278
 279   // Same as above, but on a longer timer and will run even if the process is
 280   // not idle, to ensure that IdleHandle gets called eventually.
 281   scoped_ptr<base::RepeatingTimer<content::RenderThread> > forced_idle_timer_;
 282
 283   // All declared function names.
 284   std::set<std::string> function_names_;
 285
 286   // The extensions and apps that are active in this process.
 287   ExtensionIdSet active_extension_ids_;
 288
 289   ResourceBundleSourceMap source_map_;
 290
 291   // Cache for the v8 representation of extension API schemas.
 292   scoped_ptr<V8SchemaRegistry> v8_schema_registry_;
 293
 294   // Sends API requests to the extension host.
 295   scoped_ptr<RequestSender> request_sender_;
 296
 297   // The platforms system font family and size;
 298   std::string system_font_family_;
 299   std::string system_font_size_;
 300
 301   // Mapping of port IDs to tabs. If there is no tab, the value would be -1.
 302   std::map<int, int> port_to_tab_id_map_;
 303
 304   // True once WebKit has been initialized (and it is therefore safe to poke).
 305   bool is_webkit_initialized_;
 306
 307   // It is important for this to come after the ScriptInjectionManager, so that
 308   // the observer is destroyed before the UserScriptSet.
 309   ScopedObserver<UserScriptSetManager, UserScriptSetManager::Observer>
 310       user_script_set_manager_observer_;
 311
 312   // Status of webrequest usage.
 313   bool webrequest_used_;
 314
 315   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 316 };
 317
 318 }  // namespace extensions
 319
 320 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_