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 webkit {
  45 namespace npapi {
  46 class PluginList;
  47 }
  48 }
  49
  50 namespace content {
  51 class BrowserContext;
  52 class PluginDirWatcherDelegate;
  53 class PluginLoaderPosix;
  54 class PluginServiceFilter;
  55 class ResourceContext;
  56 struct PepperPluginInfo;
  57
  58 // base::Bind() has limited arity, and the filter-related methods tend to
  59 // surpass that limit.
  60 struct PluginServiceFilterParams {
  61   int render_process_id;
  62   int render_frame_id;
  63   GURL page_url;
  64   ResourceContext* resource_context;
  65 };
  66
  67 class CONTENT_EXPORT PluginServiceImpl
  68     : NON_EXPORTED_BASE(public PluginService) {
  69  public:
  70   // Returns the PluginServiceImpl singleton.
  71   static PluginServiceImpl* GetInstance();
  72
  73   // PluginService implementation:
  74   virtual void Init() OVERRIDE;
  75   virtual void StartWatchingPlugins() OVERRIDE;
  76   virtual bool GetPluginInfoArray(
  77       const GURL& url,
  78       const std::string& mime_type,
  79       bool allow_wildcard,
  80       std::vector<WebPluginInfo>* info,
  81       std::vector<std::string>* actual_mime_types) OVERRIDE;
  82   virtual bool GetPluginInfo(int render_process_id,
  83                              int render_frame_id,
  84                              ResourceContext* context,
  85                              const GURL& url,
  86                              const GURL& page_url,
  87                              const std::string& mime_type,
  88                              bool allow_wildcard,
  89                              bool* is_stale,
  90                              WebPluginInfo* info,
  91                              std::string* actual_mime_type) OVERRIDE;
  92   virtual bool GetPluginInfoByPath(const base::FilePath& plugin_path,
  93                                    WebPluginInfo* info) OVERRIDE;
  94   virtual base::string16 GetPluginDisplayNameByPath(
  95       const base::FilePath& path) OVERRIDE;
  96   virtual void GetPlugins(const GetPluginsCallback& callback) OVERRIDE;
  97   virtual PepperPluginInfo* GetRegisteredPpapiPluginInfo(
  98       const base::FilePath& plugin_path) OVERRIDE;
  99   virtual void SetFilter(PluginServiceFilter* filter) OVERRIDE;
 100   virtual PluginServiceFilter* GetFilter() OVERRIDE;
 101   virtual void ForcePluginShutdown(const base::FilePath& plugin_path) OVERRIDE;
 102   virtual bool IsPluginUnstable(const base::FilePath& plugin_path) OVERRIDE;
 103   virtual void RefreshPlugins() OVERRIDE;
 104   virtual void AddExtraPluginPath(const base::FilePath& path) OVERRIDE;
 105   virtual void RemoveExtraPluginPath(const base::FilePath& path) OVERRIDE;
 106   virtual void AddExtraPluginDir(const base::FilePath& path) OVERRIDE;
 107   virtual void RegisterInternalPlugin(
 108       const WebPluginInfo& info, bool add_at_beginning) OVERRIDE;
 109   virtual void UnregisterInternalPlugin(const base::FilePath& path) OVERRIDE;
 110   virtual void GetInternalPlugins(
 111       std::vector<WebPluginInfo>* plugins) OVERRIDE;
 112   virtual bool NPAPIPluginsSupported() OVERRIDE;
 113   virtual void DisablePluginsDiscoveryForTesting() OVERRIDE;
 114 #if defined(OS_MACOSX)
 115   virtual void AppActivated() OVERRIDE;
 116 #elif defined(OS_WIN)
 117   virtual bool GetPluginInfoFromWindow(HWND window,
 118                                        base::string16* plugin_name,
 119                                        base::string16* plugin_version) OVERRIDE;
 120
 121   // Returns true iff the given HWND is a plugin.
 122   bool IsPluginWindow(HWND window);
 123 #endif
 124   virtual bool PpapiDevChannelSupported() OVERRIDE;
 125
 126   // Returns the plugin process host corresponding to the plugin process that
 127   // has been started by this service. This will start a process to host the
 128   // 'plugin_path' if needed. If the process fails to start, the return value
 129   // is NULL. Must be called on the IO thread.
 130   PluginProcessHost* FindOrStartNpapiPluginProcess(
 131       int render_process_id, const base::FilePath& plugin_path);
 132   PpapiPluginProcessHost* FindOrStartPpapiPluginProcess(
 133       int render_process_id,
 134       const base::FilePath& plugin_path,
 135       const base::FilePath& profile_data_directory);
 136   PpapiPluginProcessHost* FindOrStartPpapiBrokerProcess(
 137       int render_process_id, const base::FilePath& plugin_path);
 138
 139   // Opens a channel to a plugin process for the given mime type, starting
 140   // a new plugin process if necessary.  This must be called on the IO thread
 141   // or else a deadlock can occur.
 142   void OpenChannelToNpapiPlugin(int render_process_id,
 143                                 int render_frame_id,
 144                                 const GURL& url,
 145                                 const GURL& page_url,
 146                                 const std::string& mime_type,
 147                                 PluginProcessHost::Client* client);
 148   void OpenChannelToPpapiPlugin(int render_process_id,
 149                                 const base::FilePath& plugin_path,
 150                                 const base::FilePath& profile_data_directory,
 151                                 PpapiPluginProcessHost::PluginClient* client);
 152   void OpenChannelToPpapiBroker(int render_process_id,
 153                                 const base::FilePath& path,
 154                                 PpapiPluginProcessHost::BrokerClient* client);
 155
 156   // Cancels opening a channel to a NPAPI plugin.
 157   void CancelOpenChannelToNpapiPlugin(PluginProcessHost::Client* client);
 158
 159   // Used to monitor plug-in stability.
 160   void RegisterPluginCrash(const base::FilePath& plugin_path);
 161
 162  private:
 163   friend struct DefaultSingletonTraits<PluginServiceImpl>;
 164
 165   // Creates the PluginServiceImpl object, but doesn't actually build the plugin
 166   // list yet.  It's generated lazily.
 167   PluginServiceImpl();
 168   virtual ~PluginServiceImpl();
 169
 170   void OnWaitableEventSignaled(base::WaitableEvent* waitable_event);
 171
 172   // Returns the plugin process host corresponding to the plugin process that
 173   // has been started by this service. Returns NULL if no process has been
 174   // started.
 175   PluginProcessHost* FindNpapiPluginProcess(const base::FilePath& plugin_path);
 176   PpapiPluginProcessHost* FindPpapiPluginProcess(
 177       const base::FilePath& plugin_path,
 178       const base::FilePath& profile_data_directory);
 179   PpapiPluginProcessHost* FindPpapiBrokerProcess(
 180       const base::FilePath& broker_path);
 181
 182   void RegisterPepperPlugins();
 183
 184   // Run on the blocking pool to load the plugins synchronously.
 185   void GetPluginsInternal(base::MessageLoopProxy* target_loop,
 186                           const GetPluginsCallback& callback);
 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_