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// Copyright (c) 2011 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
// This class responds to requests from renderers for the list of plugins, and
// also a proxy object for plugin instances.
#ifndef CONTENT_BROWSER_PLUGIN_SERVICE_H_
#define CONTENT_BROWSER_PLUGIN_SERVICE_H_
#pragma once
#include <string>
#include <vector>
#include "base/basictypes.h"
#include "base/memory/scoped_vector.h"
#include "base/memory/singleton.h"
#include "base/synchronization/waitable_event_watcher.h"
#include "build/build_config.h"
#include "content/browser/plugin_process_host.h"
#include "content/browser/ppapi_plugin_process_host.h"
#include "content/browser/ppapi_broker_process_host.h"
#include "content/common/content_export.h"
#include "content/common/notification_observer.h"
#include "content/common/notification_registrar.h"
#include "googleurl/src/gurl.h"
#include "ipc/ipc_channel_handle.h"
#include "webkit/plugins/webplugininfo.h"
#if defined(OS_WIN)
#include "base/memory/scoped_ptr.h"
#include "base/win/registry.h"
#endif
#if defined(OS_POSIX) && !defined(OS_MACOSX)
#include "base/files/file_path_watcher.h"
#endif
struct PepperPluginInfo;
class PluginDirWatcherDelegate;
namespace content {
class ResourceContext;
class PluginServiceFilter;
}
// This must be created on the main thread but it's only called on the IO/file
// thread.
class CONTENT_EXPORT PluginService
: public base::WaitableEventWatcher::Delegate,
public NotificationObserver {
public:
struct OverriddenPlugin {
int render_process_id;
int render_view_id;
GURL url; // If empty, the override applies to all urls in render_view.
webkit::WebPluginInfo plugin;
};
// Returns the PluginService singleton.
static PluginService* GetInstance();
// Starts watching for changes in the list of installed plug-ins.
void StartWatchingPlugins();
// Gets the browser's UI locale.
const std::string& GetUILocale();
// Returns the plugin process host corresponding to the plugin process that
// has been started by this service. Returns NULL if no process has been
// started.
PluginProcessHost* FindNpapiPluginProcess(const FilePath& plugin_path);
PpapiPluginProcessHost* FindPpapiPluginProcess(const FilePath& plugin_path);
PpapiBrokerProcessHost* FindPpapiBrokerProcess(const FilePath& broker_path);
// Returns the plugin process host corresponding to the plugin process that
// has been started by this service. This will start a process to host the
// 'plugin_path' if needed. If the process fails to start, the return value
// is NULL. Must be called on the IO thread.
PluginProcessHost* FindOrStartNpapiPluginProcess(
const FilePath& plugin_path);
PpapiPluginProcessHost* FindOrStartPpapiPluginProcess(
const FilePath& plugin_path,
PpapiPluginProcessHost::Client* client);
PpapiBrokerProcessHost* FindOrStartPpapiBrokerProcess(
const FilePath& plugin_path);
// Opens a channel to a plugin process for the given mime type, starting
// a new plugin process if necessary. This must be called on the IO thread
// or else a deadlock can occur.
void OpenChannelToNpapiPlugin(int render_process_id,
int render_view_id,
const GURL& url,
const GURL& page_url,
const std::string& mime_type,
PluginProcessHost::Client* client);
void OpenChannelToPpapiPlugin(const FilePath& path,
PpapiPluginProcessHost::Client* client);
void OpenChannelToPpapiBroker(const FilePath& path,
PpapiBrokerProcessHost::Client* client);
// Cancels opening a channel to a NPAPI plugin.
void CancelOpenChannelToNpapiPlugin(PluginProcessHost::Client* client);
// Gets the plugin in the list of plugins that matches the given url and mime
// type. Must be called on the FILE thread if |use_stale| is NULL.
bool GetPluginInfo(int render_process_id,
int render_view_id,
const content::ResourceContext& context,
const GURL& url,
const GURL& page_url,
const std::string& mime_type,
bool allow_wildcard,
bool* use_stale,
webkit::WebPluginInfo* info,
std::string* actual_mime_type);
// Returns a list of all plug-ins available to the resource context. Must be
// called on the FILE thread.
void GetPlugins(const content::ResourceContext& context,
std::vector<webkit::WebPluginInfo>* plugins);
// Tells all the renderer processes to throw away their cache of the plugin
// list, and optionally also reload all the pages with plugins.
// NOTE: can only be called on the UI thread.
static void PurgePluginListCache(bool reload_pages);
void set_filter(content::PluginServiceFilter* filter) {
filter_ = filter;
}
private:
friend struct DefaultSingletonTraits<PluginService>;
// Creates the PluginService object, but doesn't actually build the plugin
// list yet. It's generated lazily.
PluginService();
virtual ~PluginService();
// base::WaitableEventWatcher::Delegate implementation.
virtual void OnWaitableEventSignaled(base::WaitableEvent* waitable_event);
// NotificationObserver implementation
virtual void Observe(int type, const NotificationSource& source,
const NotificationDetails& details);
void RegisterPepperPlugins();
PepperPluginInfo* GetRegisteredPpapiPluginInfo(const FilePath& plugin_path);
// Helper so we can do the plugin lookup on the FILE thread.
void GetAllowedPluginForOpenChannelToPlugin(
int render_process_id,
int render_view_id,
const GURL& url,
const GURL& page_url,
const std::string& mime_type,
PluginProcessHost::Client* client,
const content::ResourceContext* resource_context);
// Helper so we can finish opening the channel after looking up the
// plugin.
void FinishOpenChannelToPlugin(
const FilePath& plugin_path,
PluginProcessHost::Client* client);
#if defined(OS_POSIX) && !defined(OS_MACOSX)
// Registers a new FilePathWatcher for a given path.
static void RegisterFilePathWatcher(
base::files::FilePathWatcher* watcher,
const FilePath& path,
base::files::FilePathWatcher::Delegate* delegate);
#endif
// The browser's UI locale.
const std::string ui_locale_;
NotificationRegistrar registrar_;
#if defined(OS_WIN)
// Registry keys for getting notifications when new plugins are installed.
base::win::RegKey hkcu_key_;
base::win::RegKey hklm_key_;
scoped_ptr<base::WaitableEvent> hkcu_event_;
scoped_ptr<base::WaitableEvent> hklm_event_;
base::WaitableEventWatcher hkcu_watcher_;
base::WaitableEventWatcher hklm_watcher_;
#endif
#if defined(OS_POSIX) && !defined(OS_MACOSX)
ScopedVector<base::files::FilePathWatcher> file_watchers_;
scoped_refptr<PluginDirWatcherDelegate> file_watcher_delegate_;
#endif
std::vector<PepperPluginInfo> ppapi_plugins_;
// Weak pointer; outlives us.
content::PluginServiceFilter* filter_;
std::set<PluginProcessHost::Client*> pending_plugin_clients_;
DISALLOW_COPY_AND_ASSIGN(PluginService);
};
DISABLE_RUNNABLE_METHOD_REFCOUNT(PluginService);
#endif // CONTENT_BROWSER_PLUGIN_SERVICE_H_
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