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/scoped_observer.h"
  15 #include "base/timer/timer.h"
  16 #include "content/public/renderer/render_process_observer.h"
  17 #include "extensions/common/event_filter.h"
  18 #include "extensions/common/extension_set.h"
  19 #include "extensions/common/extensions_client.h"
  20 #include "extensions/common/features/feature.h"
  21 #include "extensions/renderer/resource_bundle_source_map.h"
  22 #include "extensions/renderer/script_context.h"
  23 #include "extensions/renderer/script_context_set.h"
  24 #include "extensions/renderer/user_script_set_manager.h"
  25 #include "extensions/renderer/v8_schema_registry.h"
  26 #include "third_party/WebKit/public/platform/WebString.h"
  27 #include "third_party/WebKit/public/platform/WebVector.h"
  28 #include "v8/include/v8.h"
  29
  30 class ChromeRenderViewTest;
  31 class GURL;
  32 class ModuleSystem;
  33 class URLPattern;
  34 struct ExtensionMsg_ExternalConnectionInfo;
  35 struct ExtensionMsg_Loaded_Params;
  36 struct ExtensionMsg_TabConnectionInfo;
  37 struct ExtensionMsg_UpdatePermissions_Params;
  38
  39 namespace blink {
  40 class WebFrame;
  41 class WebSecurityOrigin;
  42 }
  43
  44 namespace base {
  45 class ListValue;
  46 }
  47
  48 namespace content {
  49 class RenderThread;
  50 }
  51
  52 namespace extensions {
  53 class ContentWatcher;
  54 class DispatcherDelegate;
  55 class Extension;
  56 class FilteredEventRouter;
  57 class ManifestPermissionSet;
  58 class RequestSender;
  59 class ScriptContext;
  60 class ScriptInjectionManager;
  61 struct Message;
  62
  63 // Dispatches extension control messages sent to the renderer and stores
  64 // renderer extension related state.
  65 class Dispatcher : public content::RenderProcessObserver,
  66                    public UserScriptSetManager::Observer {
  67  public:
  68   explicit Dispatcher(DispatcherDelegate* delegate);
  69   ~Dispatcher() override;
  70
  71   const std::set<std::string>& function_names() const {
  72     return function_names_;
  73   }
  74
  75   bool is_extension_process() const { return is_extension_process_; }
  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   // Finds the extension for the JavaScript context associated with the
  94   // specified |frame| and isolated world. If |world_id| is zero, finds the
  95   // extension ID associated with the main world's JavaScript context. If the
  96   // JavaScript context isn't from an extension, returns empty string.
  97   const Extension* GetExtensionFromFrameAndWorld(const blink::WebFrame* frame,
  98                                                  int world_id,
  99                                                  bool use_effective_url);
 100
 101   void DidCreateScriptContext(blink::WebFrame* frame,
 102                               const v8::Handle<v8::Context>& context,
 103                               int extension_group,
 104                               int world_id);
 105
 106   void WillReleaseScriptContext(blink::WebFrame* frame,
 107                                 const v8::Handle<v8::Context>& context,
 108                                 int world_id);
 109
 110   void DidCreateDocumentElement(blink::WebFrame* frame);
 111
 112   void DidMatchCSS(
 113       blink::WebFrame* frame,
 114       const blink::WebVector<blink::WebString>& newly_matching_selectors,
 115       const blink::WebVector<blink::WebString>& stopped_matching_selectors);
 116
 117   void OnExtensionResponse(int request_id,
 118                            bool success,
 119                            const base::ListValue& response,
 120                            const std::string& error);
 121
 122   // Checks that the current context contains an extension that has permission
 123   // to execute the specified function. If it does not, a v8 exception is thrown
 124   // and the method returns false. Otherwise returns true.
 125   bool CheckContextAccessToExtensionAPI(const std::string& function_name,
 126                                         ScriptContext* context) const;
 127
 128   // Dispatches the event named |event_name| to all render views.
 129   void DispatchEvent(const std::string& extension_id,
 130                      const std::string& event_name) const;
 131
 132   // Shared implementation of the various MessageInvoke IPCs.
 133   void InvokeModuleSystemMethod(content::RenderView* render_view,
 134                                 const std::string& extension_id,
 135                                 const std::string& module_name,
 136                                 const std::string& function_name,
 137                                 const base::ListValue& args,
 138                                 bool user_gesture);
 139
 140   void ClearPortData(int port_id);
 141
 142   // Returns a list of (module name, resource id) pairs for the JS modules to
 143   // add to the source map.
 144   static std::vector<std::pair<std::string, int> > GetJsResources();
 145   static void RegisterNativeHandlers(ModuleSystem* module_system,
 146                                      ScriptContext* context,
 147                                      Dispatcher* dispatcher,
 148                                      RequestSender* request_sender,
 149                                      V8SchemaRegistry* v8_schema_registry);
 150
 151   bool WasWebRequestUsedBySomeExtensions() const { return webrequest_used_; }
 152
 153  private:
 154   friend class ::ChromeRenderViewTest;
 155   FRIEND_TEST_ALL_PREFIXES(RendererPermissionsPolicyDelegateTest,
 156                            CannotScriptWebstore);
 157
 158   // RenderProcessObserver implementation:
 159   bool OnControlMessageReceived(const IPC::Message& message) override;
 160   void WebKitInitialized() override;
 161   void IdleNotification() override;
 162   void OnRenderProcessShutdown() override;
 163
 164   void OnActivateExtension(const std::string& extension_id);
 165   void OnCancelSuspend(const std::string& extension_id);
 166   void OnDeliverMessage(int target_port_id, const Message& message);
 167   void OnDispatchOnConnect(int target_port_id,
 168                            const std::string& channel_name,
 169                            const ExtensionMsg_TabConnectionInfo& source,
 170                            const ExtensionMsg_ExternalConnectionInfo& info,
 171                            const std::string& tls_channel_id);
 172   void OnDispatchOnDisconnect(int port_id, const std::string& error_message);
 173   void OnLoaded(
 174       const std::vector<ExtensionMsg_Loaded_Params>& loaded_extensions);
 175   void OnLoadedInternal(scoped_refptr<const Extension> extension);
 176   void OnMessageInvoke(const std::string& extension_id,
 177                        const std::string& module_name,
 178                        const std::string& function_name,
 179                        const base::ListValue& args,
 180                        bool user_gesture);
 181   void OnSetChannel(int channel);
 182   void OnSetFunctionNames(const std::vector<std::string>& names);
 183   void OnSetScriptingWhitelist(
 184       const ExtensionsClient::ScriptingWhitelist& extension_ids);
 185   void OnSetSystemFont(const std::string& font_family,
 186                        const std::string& font_size);
 187   void OnShouldSuspend(const std::string& extension_id, uint64 sequence_id);
 188   void OnSuspend(const std::string& extension_id);
 189   void OnTransferBlobs(const std::vector<std::string>& blob_uuids);
 190   void OnUnloaded(const std::string& id);
 191   void OnUpdatePermissions(const ExtensionMsg_UpdatePermissions_Params& params);
 192   void OnUpdateTabSpecificPermissions(const GURL& visible_url,
 193                                       const std::string& extension_id,
 194                                       const URLPatternSet& new_hosts,
 195                                       bool update_origin_whitelist,
 196                                       int tab_id);
 197   void OnClearTabSpecificPermissions(
 198       const std::vector<std::string>& extension_ids,
 199       bool update_origin_whitelist,
 200       int tab_id);
 201   void OnUsingWebRequestAPI(bool webrequest_used);
 202
 203   // UserScriptSetManager::Observer implementation.
 204   void OnUserScriptsUpdated(const std::set<std::string>& changed_extensions,
 205                             const std::vector<UserScript*>& scripts) override;
 206
 207   void UpdateActiveExtensions();
 208
 209   // Sets up the host permissions for |extension|.
 210   void InitOriginPermissions(const Extension* extension);
 211
 212   // Updates the host permissions for the extension url to include only those in
 213   // |new_patterns|, and remove from |old_patterns| that are no longer allowed.
 214   void UpdateOriginPermissions(const GURL& extension_url,
 215                                const URLPatternSet& old_patterns,
 216                                const URLPatternSet& new_patterns);
 217
 218   // Enable custom element whitelist in Apps.
 219   void EnableCustomElementWhiteList();
 220
 221   // Adds or removes bindings for every context belonging to |extension_id|, or
 222   // or all contexts if |extension_id| is empty.
 223   void UpdateBindings(const std::string& extension_id);
 224
 225   void UpdateBindingsForContext(ScriptContext* context);
 226
 227   void RegisterBinding(const std::string& api_name, ScriptContext* context);
 228
 229   void RegisterNativeHandlers(ModuleSystem* module_system,
 230                               ScriptContext* context);
 231
 232   // Determines if a ScriptContext can connect to any externally_connectable-
 233   // enabled extension.
 234   bool IsRuntimeAvailableToContext(ScriptContext* context);
 235
 236   // Updates a web page context with any content capabilities granted by active
 237   // extensions.
 238   void UpdateContentCapabilities(ScriptContext* context);
 239
 240   // Inserts static source code into |source_map_|.
 241   void PopulateSourceMap();
 242
 243   // Returns whether the current renderer hosts a platform app.
 244   bool IsWithinPlatformApp();
 245
 246   bool IsSandboxedPage(const GURL& url) const;
 247
 248   // Returns the Feature::Context type of context for a JavaScript context.
 249   Feature::Context ClassifyJavaScriptContext(
 250       const Extension* extension,
 251       int extension_group,
 252       const GURL& url,
 253       const blink::WebSecurityOrigin& origin);
 254
 255   // Gets |field| from |object| or creates it as an empty object if it doesn't
 256   // exist.
 257   v8::Handle<v8::Object> GetOrCreateObject(const v8::Handle<v8::Object>& object,
 258                                            const std::string& field,
 259                                            v8::Isolate* isolate);
 260
 261   v8::Handle<v8::Object> GetOrCreateBindObjectIfAvailable(
 262       const std::string& api_name,
 263       std::string* bind_name,
 264       ScriptContext* context);
 265
 266   // The delegate for this dispatcher. Not owned, but must extend beyond the
 267   // Dispatcher's own lifetime.
 268   DispatcherDelegate* delegate_;
 269
 270   // True if this renderer is running extensions.
 271   bool is_extension_process_;
 272
 273   // Contains all loaded extensions.  This is essentially the renderer
 274   // counterpart to ExtensionService in the browser. It contains information
 275   // about all extensions currently loaded by the browser.
 276   ExtensionSet extensions_;
 277
 278   // The IDs of extensions that failed to load, mapped to the error message
 279   // generated on failure.
 280   std::map<std::string, std::string> extension_load_errors_;
 281
 282   // All the bindings contexts that are currently loaded for this renderer.
 283   // There is zero or one for each v8 context.
 284   ScriptContextSet script_context_set_;
 285
 286   scoped_ptr<ContentWatcher> content_watcher_;
 287
 288   scoped_ptr<UserScriptSetManager> user_script_set_manager_;
 289
 290   scoped_ptr<ScriptInjectionManager> script_injection_manager_;
 291
 292   // Same as above, but on a longer timer and will run even if the process is
 293   // not idle, to ensure that IdleHandle gets called eventually.
 294   scoped_ptr<base::RepeatingTimer<content::RenderThread> > forced_idle_timer_;
 295
 296   // All declared function names.
 297   std::set<std::string> function_names_;
 298
 299   // The extensions and apps that are active in this process.
 300   std::set<std::string> active_extension_ids_;
 301
 302   ResourceBundleSourceMap source_map_;
 303
 304   // Cache for the v8 representation of extension API schemas.
 305   scoped_ptr<V8SchemaRegistry> v8_schema_registry_;
 306
 307   // Sends API requests to the extension host.
 308   scoped_ptr<RequestSender> request_sender_;
 309
 310   // The platforms system font family and size;
 311   std::string system_font_family_;
 312   std::string system_font_size_;
 313
 314   // Mapping of port IDs to tabs. If there is no tab, the value would be -1.
 315   std::map<int, int> port_to_tab_id_map_;
 316
 317   // True once WebKit has been initialized (and it is therefore safe to poke).
 318   bool is_webkit_initialized_;
 319
 320   // It is important for this to come after the ScriptInjectionManager, so that
 321   // the observer is destroyed before the UserScriptSet.
 322   ScopedObserver<UserScriptSetManager, UserScriptSetManager::Observer>
 323       user_script_set_manager_observer_;
 324
 325   // Status of webrequest usage.
 326   bool webrequest_used_;
 327
 328   DISALLOW_COPY_AND_ASSIGN(Dispatcher);
 329 };
 330
 331 }  // namespace extensions
 332
 333 #endif  // EXTENSIONS_RENDERER_DISPATCHER_H_