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 #if !defined(ENABLE_PLUGINS)
  12 #error "Plugins should be enabled"
  13 #endif
  14
  15 #include <map>
  16 #include <set>
  17 #include <vector>
  18
  19 #include "base/basictypes.h"
  20 #include "base/compiler_specific.h"
  21 #include "base/memory/scoped_vector.h"
  22 #include "base/memory/singleton.h"
  23 #include "base/synchronization/waitable_event_watcher.h"
  24 #include "base/threading/sequenced_worker_pool.h"
  25 #include "base/time/time.h"
  26 #include "build/build_config.h"
  27 #include "content/browser/plugin_process_host.h"
  28 #include "content/browser/ppapi_plugin_process_host.h"
  29 #include "content/common/content_export.h"
  30 #include "content/public/browser/plugin_service.h"
  31 #include "content/public/common/pepper_plugin_info.h"
  32 #include "ipc/ipc_channel_handle.h"
  33 #include "url/gurl.h"
  34
  35 #if defined(OS_WIN)
  36 #include "base/memory/scoped_ptr.h"
  37 #include "base/win/registry.h"
  38 #endif
  39
  40 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
  41 #include "base/files/file_path_watcher.h"
  42 #endif
  43
  44 namespace base {
  45 class SingleThreadTaskRunner;
  46 }
  47
  48 namespace content {
  49 class BrowserContext;
  50 class PluginDirWatcherDelegate;
  51 class PluginLoaderPosix;
  52 class PluginServiceFilter;
  53 class ResourceContext;
  54 struct PepperPluginInfo;
  55
  56 // base::Bind() has limited arity, and the filter-related methods tend to
  57 // surpass that limit.
  58 struct PluginServiceFilterParams {
  59   int render_process_id;
  60   int render_frame_id;
  61   GURL page_url;
  62   ResourceContext* resource_context;
  63 };
  64
  65 class CONTENT_EXPORT PluginServiceImpl
  66     : NON_EXPORTED_BASE(public PluginService) {
  67  public:
  68   // Returns the PluginServiceImpl singleton.
  69   static PluginServiceImpl* GetInstance();
  70
  71   // PluginService implementation:
  72   void Init() override;
  73   void StartWatchingPlugins() override;
  74   bool GetPluginInfoArray(const GURL& url,
  75                           const std::string& mime_type,
  76                           bool allow_wildcard,
  77                           std::vector<WebPluginInfo>* info,
  78                           std::vector<std::string>* actual_mime_types) override;
  79   bool GetPluginInfo(int render_process_id,
  80                      int render_frame_id,
  81                      ResourceContext* context,
  82                      const GURL& url,
  83                      const GURL& page_url,
  84                      const std::string& mime_type,
  85                      bool allow_wildcard,
  86                      bool* is_stale,
  87                      WebPluginInfo* info,
  88                      std::string* actual_mime_type) override;
  89   bool GetPluginInfoByPath(const base::FilePath& plugin_path,
  90                            WebPluginInfo* info) override;
  91   base::string16 GetPluginDisplayNameByPath(
  92       const base::FilePath& path) override;
  93   void GetPlugins(const GetPluginsCallback& callback) override;
  94   PepperPluginInfo* GetRegisteredPpapiPluginInfo(
  95       const base::FilePath& plugin_path) override;
  96   void SetFilter(PluginServiceFilter* filter) override;
  97   PluginServiceFilter* GetFilter() override;
  98   void ForcePluginShutdown(const base::FilePath& plugin_path) override;
  99   bool IsPluginUnstable(const base::FilePath& plugin_path) override;
 100   void RefreshPlugins() override;
 101   void AddExtraPluginPath(const base::FilePath& path) override;
 102   void RemoveExtraPluginPath(const base::FilePath& path) override;
 103   void AddExtraPluginDir(const base::FilePath& path) override;
 104   void RegisterInternalPlugin(const WebPluginInfo& info,
 105                               bool add_at_beginning) override;
 106   void UnregisterInternalPlugin(const base::FilePath& path) override;
 107   void GetInternalPlugins(std::vector<WebPluginInfo>* plugins) override;
 108   bool NPAPIPluginsSupported() override;
 109   void DisablePluginsDiscoveryForTesting() override;
 110 #if defined(OS_MACOSX)
 111   void AppActivated() override;
 112 #elif defined(OS_WIN)
 113   bool GetPluginInfoFromWindow(HWND window,
 114                                base::string16* plugin_name,
 115                                base::string16* plugin_version) override;
 116
 117   // Returns true iff the given HWND is a plugin.
 118   bool IsPluginWindow(HWND window);
 119 #endif
 120   bool PpapiDevChannelSupported(BrowserContext* browser_context,
 121                                 const GURL& document_url) override;
 122
 123   // Returns the plugin process host corresponding to the plugin process that
 124   // has been started by this service. This will start a process to host the
 125   // 'plugin_path' if needed. If the process fails to start, the return value
 126   // is NULL. Must be called on the IO thread.
 127   PluginProcessHost* FindOrStartNpapiPluginProcess(
 128       int render_process_id, const base::FilePath& plugin_path);
 129   PpapiPluginProcessHost* FindOrStartPpapiPluginProcess(
 130       int render_process_id,
 131       const base::FilePath& plugin_path,
 132       const base::FilePath& profile_data_directory);
 133   PpapiPluginProcessHost* FindOrStartPpapiBrokerProcess(
 134       int render_process_id, const base::FilePath& plugin_path);
 135
 136   // Opens a channel to a plugin process for the given mime type, starting
 137   // a new plugin process if necessary.  This must be called on the IO thread
 138   // or else a deadlock can occur.
 139   void OpenChannelToNpapiPlugin(int render_process_id,
 140                                 int render_frame_id,
 141                                 const GURL& url,
 142                                 const GURL& page_url,
 143                                 const std::string& mime_type,
 144                                 PluginProcessHost::Client* client);
 145   void OpenChannelToPpapiPlugin(int render_process_id,
 146                                 const base::FilePath& plugin_path,
 147                                 const base::FilePath& profile_data_directory,
 148                                 PpapiPluginProcessHost::PluginClient* client);
 149   void OpenChannelToPpapiBroker(int render_process_id,
 150                                 const base::FilePath& path,
 151                                 PpapiPluginProcessHost::BrokerClient* client);
 152
 153   // Cancels opening a channel to a NPAPI plugin.
 154   void CancelOpenChannelToNpapiPlugin(PluginProcessHost::Client* client);
 155
 156   // Used to monitor plugin stability.
 157   void RegisterPluginCrash(const base::FilePath& plugin_path);
 158
 159  private:
 160   friend struct DefaultSingletonTraits<PluginServiceImpl>;
 161
 162   // Creates the PluginServiceImpl object, but doesn't actually build the plugin
 163   // list yet.  It's generated lazily.
 164   PluginServiceImpl();
 165   ~PluginServiceImpl() override;
 166
 167 #if defined(OS_WIN)
 168   void OnKeyChanged(base::win::RegKey* key);
 169 #endif
 170
 171   // Returns the plugin process host corresponding to the plugin process that
 172   // has been started by this service. Returns NULL if no process has been
 173   // started.
 174   PluginProcessHost* FindNpapiPluginProcess(const base::FilePath& plugin_path);
 175   PpapiPluginProcessHost* FindPpapiPluginProcess(
 176       const base::FilePath& plugin_path,
 177       const base::FilePath& profile_data_directory);
 178   PpapiPluginProcessHost* FindPpapiBrokerProcess(
 179       const base::FilePath& broker_path);
 180
 181   void RegisterPepperPlugins();
 182
 183   // Run on the blocking pool to load the plugins synchronously.
 184   void GetPluginsInternal(base::SingleThreadTaskRunner* target_task_runner,
 185                           const GetPluginsCallback& callback);
 186
 187 #if defined(OS_POSIX)
 188   void GetPluginsOnIOThread(base::SingleThreadTaskRunner* target_task_runner,
 189                             const GetPluginsCallback& callback);
 190 #endif
 191
 192   // Binding directly to GetAllowedPluginForOpenChannelToPlugin() isn't possible
 193   // because more arity is needed <http://crbug.com/98542>. This just forwards.
 194   void ForwardGetAllowedPluginForOpenChannelToPlugin(
 195       const PluginServiceFilterParams& params,
 196       const GURL& url,
 197       const std::string& mime_type,
 198       PluginProcessHost::Client* client,
 199       const std::vector<WebPluginInfo>&);
 200   // Helper so we can do the plugin lookup on the FILE thread.
 201   void GetAllowedPluginForOpenChannelToPlugin(
 202       int render_process_id,
 203       int render_frame_id,
 204       const GURL& url,
 205       const GURL& page_url,
 206       const std::string& mime_type,
 207       PluginProcessHost::Client* client,
 208       ResourceContext* resource_context);
 209
 210   // Helper so we can finish opening the channel after looking up the
 211   // plugin.
 212   void FinishOpenChannelToPlugin(int render_process_id,
 213                                  const base::FilePath& plugin_path,
 214                                  PluginProcessHost::Client* client);
 215
 216 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 217   // Registers a new FilePathWatcher for a given path.
 218   static void RegisterFilePathWatcher(base::FilePathWatcher* watcher,
 219                                       const base::FilePath& path);
 220 #endif
 221
 222 #if defined(OS_WIN)
 223   // Registry keys for getting notifications when new plugins are installed.
 224   base::win::RegKey hkcu_key_;
 225   base::win::RegKey hklm_key_;
 226 #endif
 227
 228   bool npapi_plugins_enabled_;
 229
 230 #if defined(OS_POSIX) && !defined(OS_OPENBSD) && !defined(OS_ANDROID)
 231   ScopedVector<base::FilePathWatcher> file_watchers_;
 232 #endif
 233
 234   std::vector<PepperPluginInfo> ppapi_plugins_;
 235
 236   // Weak pointer; outlives us.
 237   PluginServiceFilter* filter_;
 238
 239   std::set<PluginProcessHost::Client*> pending_plugin_clients_;
 240
 241   // Used to sequentialize loading plugins from disk.
 242   base::SequencedWorkerPool::SequenceToken plugin_list_token_;
 243
 244 #if defined(OS_POSIX)
 245   scoped_refptr<PluginLoaderPosix> plugin_loader_;
 246 #endif
 247
 248   // Used to detect if a given plugin is crashing over and over.
 249   std::map<base::FilePath, std::vector<base::Time> > crash_times_;
 250
 251   DISALLOW_COPY_AND_ASSIGN(PluginServiceImpl);
 252 };
 253
 254 }  // namespace content
 255
 256 #endif  // CONTENT_BROWSER_PLUGIN_SERVICE_IMPL_H_