content/browser/plugin_service_impl.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 // This class responds to requests from renderers for the list of plugins, and
   6 // also a proxy object for plugin instances.
   7
   8 #ifndef CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_
   9 #define CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_
  10
  11 #include <map>
  12 #include <set>
  13 #include <vector>
  14
  15 #include "base/basictypes.h"
  16 #include "base/compiler_specific.h"
  17 #include "base/memory/scoped_vector.h"
  18 #include "base/memory/singleton.h"
  19 #include "base/synchronization/waitable_event_watcher.h"
  20 #include "base/threading/sequenced_worker_pool.h"
  21 #include "base/time/time.h"
  22 #include "build/build_config.h"
  23 #include "content/browser/plugin_process_host.h"
  24 #include "content/browser/ppapi_plugin_process_host.h"
  25 #include "content/common/content_export.h"
  26 #include "content/public/browser/plugin_service.h"
  27 #include "content/public/common/pepper_plugin_info.h"
  28 #include "ipc/ipc_channel_handle.h"
  29 #include "url/gurl.h"
  30
  31 #if defined(OS_WIN)
  32 #include "base/memory/scoped_ptr.h"
  33 #include "base/win/registry.h"
  34 #endif
  35
  36 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
  37 #include "base/files/file_path_watcher.h"
  38 #endif
  39
  40 namespace base {
  41 class MessageLoopProxy;
  42 }
  43
  44 namespace content {
  45 class BrowserContext;
  46 class PluginDirWatcherDelegate;
  47 class PluginLoaderPosix;
  48 class PluginServiceFilter;
  49 class ResourceContext;
  50 struct PepperPluginInfo;
  51
  52 // base::Bind() has limited arity, and the filter-related methods tend to
  53 // surpass that limit.
  54 struct PluginServiceFilterParams {
  55   int render_process_id;
  56   int render_frame_id;
  57   GURL page_url;
  58   ResourceContext* resource_context;
  59 };
  60
  61 class CONTENT_EXPORT PluginServiceImpl
  62     : NON_EXPORTED_BASE(public PluginService) {
  63  public:
  64   // Returns the PluginServiceImpl singleton.
  65   static PluginServiceImpl* GetInstance();
  66
  67   // PluginService implementation:
  68   virtual void Init() OVERRIDE;
  69   virtual void StartWatchingPlugins() OVERRIDE;
  70   virtual bool GetPluginInfoArray(
  71       const GURL& url,
  72       const std::string& mime_type,
  73       bool allow_wildcard,
  74       std::vector<WebPluginInfo>* info,
  75       std::vector<std::string>* actual_mime_types) OVERRIDE;
  76   virtual bool GetPluginInfo(int render_process_id,
  77                              int render_frame_id,
  78                              ResourceContext* context,
  79                              const GURL& url,
  80                              const GURL& page_url,
  81                              const std::string& mime_type,
  82                              bool allow_wildcard,
  83                              bool* is_stale,
  84                              WebPluginInfo* info,
  85                              std::string* actual_mime_type) OVERRIDE;
  86   virtual bool GetPluginInfoByPath(const base::FilePath& plugin_path,
  87                                    WebPluginInfo* info) OVERRIDE;
  88   virtual base::string16 GetPluginDisplayNameByPath(
  89       const base::FilePath& path) OVERRIDE;
  90   virtual void GetPlugins(const GetPluginsCallback& callback) OVERRIDE;
  91   virtual PepperPluginInfo* GetRegisteredPpapiPluginInfo(
  92       const base::FilePath& plugin_path) OVERRIDE;
  93   virtual void SetFilter(PluginServiceFilter* filter) OVERRIDE;
  94   virtual PluginServiceFilter* GetFilter() OVERRIDE;
  95   virtual void ForcePluginShutdown(const base::FilePath& plugin_path) OVERRIDE;
  96   virtual bool IsPluginUnstable(const base::FilePath& plugin_path) OVERRIDE;
  97   virtual void RefreshPlugins() OVERRIDE;
  98   virtual void AddExtraPluginPath(const base::FilePath& path) OVERRIDE;
  99   virtual void RemoveExtraPluginPath(const base::FilePath& path) OVERRIDE;
 100   virtual void AddExtraPluginDir(const base::FilePath& path) OVERRIDE;
 101   virtual void RegisterInternalPlugin(
 102       const WebPluginInfo& info, bool add_at_beginning) OVERRIDE;
 103   virtual void UnregisterInternalPlugin(const base::FilePath& path) OVERRIDE;
 104   virtual void GetInternalPlugins(
 105       std::vector<WebPluginInfo>* plugins) OVERRIDE;
 106   virtual bool NPAPIPluginsSupported() OVERRIDE;
 107   virtual void DisablePluginsDiscoveryForTesting() OVERRIDE;
 108 #if defined(OS_MACOSX)
 109   virtual void AppActivated() OVERRIDE;
 110 #elif defined(OS_WIN)
 111   virtual bool GetPluginInfoFromWindow(HWND window,
 112                                        base::string16* plugin_name,
 113                                        base::string16* plugin_version) OVERRIDE;
 114
 115   // Returns true iff the given HWND is a plugin.
 116   bool IsPluginWindow(HWND window);
 117 #endif
 118   virtual bool PpapiDevChannelSupported() OVERRIDE;
 119
 120   // Returns the plugin process host corresponding to the plugin process that
 121   // has been started by this service. This will start a process to host the
 122   // 'plugin_path' if needed. If the process fails to start, the return value
 123   // is NULL. Must be called on the IO thread.
 124   PluginProcessHost* FindOrStartNpapiPluginProcess(
 125       int render_process_id, const base::FilePath& plugin_path);
 126   PpapiPluginProcessHost* FindOrStartPpapiPluginProcess(
 127       int render_process_id,
 128       const base::FilePath& plugin_path,
 129       const base::FilePath& profile_data_directory);
 130   PpapiPluginProcessHost* FindOrStartPpapiBrokerProcess(
 131       int render_process_id, const base::FilePath& plugin_path);
 132
 133   // Opens a channel to a plugin process for the given mime type, starting
 134   // a new plugin process if necessary.  This must be called on the IO thread
 135   // or else a deadlock can occur.
 136   void OpenChannelToNpapiPlugin(int render_process_id,
 137                                 int render_frame_id,
 138                                 const GURL& url,
 139                                 const GURL& page_url,
 140                                 const std::string& mime_type,
 141                                 PluginProcessHost::Client* client);
 142   void OpenChannelToPpapiPlugin(int render_process_id,
 143                                 const base::FilePath& plugin_path,
 144                                 const base::FilePath& profile_data_directory,
 145                                 PpapiPluginProcessHost::PluginClient* client);
 146   void OpenChannelToPpapiBroker(int render_process_id,
 147                                 const base::FilePath& path,
 148                                 PpapiPluginProcessHost::BrokerClient* client);
 149
 150   // Cancels opening a channel to a NPAPI plugin.
 151   void CancelOpenChannelToNpapiPlugin(PluginProcessHost::Client* client);
 152
 153   // Used to monitor plug-in stability.
 154   void RegisterPluginCrash(const base::FilePath& plugin_path);
 155
 156  private:
 157   friend struct DefaultSingletonTraits<PluginServiceImpl>;
 158
 159   // Creates the PluginServiceImpl object, but doesn't actually build the plugin
 160   // list yet.  It's generated lazily.
 161   PluginServiceImpl();
 162   virtual ~PluginServiceImpl();
 163
 164   void OnWaitableEventSignaled(base::WaitableEvent* waitable_event);
 165
 166   // Returns the plugin process host corresponding to the plugin process that
 167   // has been started by this service. Returns NULL if no process has been
 168   // started.
 169   PluginProcessHost* FindNpapiPluginProcess(const base::FilePath& plugin_path);
 170   PpapiPluginProcessHost* FindPpapiPluginProcess(
 171       const base::FilePath& plugin_path,
 172       const base::FilePath& profile_data_directory);
 173   PpapiPluginProcessHost* FindPpapiBrokerProcess(
 174       const base::FilePath& broker_path);
 175
 176   void RegisterPepperPlugins();
 177
 178   // Run on the blocking pool to load the plugins synchronously.
 179   void GetPluginsInternal(base::MessageLoopProxy* target_loop,
 180                           const GetPluginsCallback& callback);
 181
 182 #if defined(OS_POSIX)
 183   void GetPluginsOnIOThread(
 184       base::MessageLoopProxy* target_loop,
 185       const GetPluginsCallback& callback);
 186 #endif
 187
 188   // Binding directly to GetAllowedPluginForOpenChannelToPlugin() isn't possible
 189   // because more arity is needed <http://crbug.com/98542>. This just forwards.
 190   void ForwardGetAllowedPluginForOpenChannelToPlugin(
 191       const PluginServiceFilterParams& params,
 192       const GURL& url,
 193       const std::string& mime_type,
 194       PluginProcessHost::Client* client,
 195       const std::vector<WebPluginInfo>&);
 196   // Helper so we can do the plugin lookup on the FILE thread.
 197   void GetAllowedPluginForOpenChannelToPlugin(
 198       int render_process_id,
 199       int render_frame_id,
 200       const GURL& url,
 201       const GURL& page_url,
 202       const std::string& mime_type,
 203       PluginProcessHost::Client* client,
 204       ResourceContext* resource_context);
 205
 206   // Helper so we can finish opening the channel after looking up the
 207   // plugin.
 208   void FinishOpenChannelToPlugin(int render_process_id,
 209                                  const base::FilePath& plugin_path,
 210                                  PluginProcessHost::Client* client);
 211
 212 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 213   // Registers a new FilePathWatcher for a given path.
 214   static void RegisterFilePathWatcher(base::FilePathWatcher* watcher,
 215                                       const base::FilePath& path);
 216 #endif
 217
 218 #if defined(OS_WIN)
 219   // Registry keys for getting notifications when new plugins are installed.
 220   base::win::RegKey hkcu_key_;
 221   base::win::RegKey hklm_key_;
 222   scoped_ptr<base::WaitableEvent> hkcu_event_;
 223   scoped_ptr<base::WaitableEvent> hklm_event_;
 224   base::WaitableEventWatcher hkcu_watcher_;
 225   base::WaitableEventWatcher hklm_watcher_;
 226 #endif
 227
 228 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 229   ScopedVector<base::FilePathWatcher> file_watchers_;
 230 #endif
 231
 232   std::vector<PepperPluginInfo> ppapi_plugins_;
 233
 234   // Weak pointer; outlives us.
 235   PluginServiceFilter* filter_;
 236
 237   std::set<PluginProcessHost::Client*> pending_plugin_clients_;
 238
 239   // Used to sequentialize loading plug-ins from disk.
 240   base::SequencedWorkerPool::SequenceToken plugin_list_token_;
 241
 242 #if defined(OS_POSIX)
 243   scoped_refptr<PluginLoaderPosix> plugin_loader_;
 244 #endif
 245
 246   // Used to detect if a given plug-in is crashing over and over.
 247   std::map<base::FilePath, std::vector<base::Time> > crash_times_;
 248
 249   DISALLOW_COPY_AND_ASSIGN(PluginServiceImpl);
 250 };
 251
 252 }  // namespace content
 253
 254 #endif  // CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_