Pepper Flash settings integration: implement "deauthorize content licenses".

chrome/browser/pepper_flash_settings_manager.cc

 // Copyright (c) 2012 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.
 
 #include "chrome/browser/pepper_flash_settings_manager.h"
 
+#include <map>
+#include <utility>
 #include <vector>
 
+#include "base/bind.h"
+#include "base/compiler_specific.h"
+#include "base/sequenced_task_runner_helpers.h"
+#include "base/utf_string_conversions.h"
 #include "chrome/browser/plugin_prefs.h"
+#include "chrome/browser/profiles/profile.h"
 #include "content/browser/plugin_service_impl.h"
+#include "content/browser/ppapi_plugin_process_host.h"
+#include "content/public/browser/browser_context.h"
+#include "content/public/browser/browser_thread.h"
+#include "content/public/common/content_constants.h"
+#include "ipc/ipc_channel.h"
+#include "ppapi/proxy/ppapi_messages.h"
 #include "webkit/plugins/plugin_constants.h"
 #include "webkit/plugins/webplugininfo.h"
 
+using content::BrowserThread;
+
+class PepperFlashSettingsManager::Core
+    : public PpapiPluginProcessHost::BrokerClient,
+      public IPC::Channel::Listener,
+      public base::RefCountedThreadSafe<Core, BrowserThread::DeleteOnIOThread> {
+ public:
+  Core(PepperFlashSettingsManager* manager,
+       content::BrowserContext* browser_context);
+
+  // Stops sending notifications to |manager_| and sets it to NULL.
+  void Detach();
+
+  void DeauthorizeContentLicenses(uint32 request_id);
+
+  // PpapiPluginProcessHost::BrokerClient implementation.
+  virtual void GetPpapiChannelInfo(base::ProcessHandle* renderer_handle,
+                                   int* renderer_id) OVERRIDE;
+  virtual void OnPpapiChannelOpened(const IPC::ChannelHandle& channel_handle,
+                                    int plugin_child_id) OVERRIDE;
+  virtual bool OffTheRecord() OVERRIDE;
+
+  // IPC::Channel::Listener implementation.
+  virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE;
+  virtual void OnChannelError() OVERRIDE;
+
+ private:
+  friend struct BrowserThread::DeleteOnThread<BrowserThread::IO>;
+  friend class base::DeleteHelper<Core>;
+
+  enum RequestType {
+    INVALID_REQUEST_TYPE = 0,
+    DEAUTHORIZE_CONTENT_LICENSES
+  };
+
+  struct PendingRequest {
+    PendingRequest() : id(0), type(INVALID_REQUEST_TYPE) {}
+
+    uint32 id;
+    RequestType type;
+  };
+
+  virtual ~Core();
+
+  void Initialize();
+  void ConnectToChannel(const IPC::ChannelHandle& handle);
+
+  void DeauthorizeContentLicensesOnIOThread(uint32 request_id);
+  void NotifyErrorFromIOThread();
+
+  void NotifyDeauthorizeContentLicensesCompleted(uint32 request_id,
+                                                 bool success);
+  void NotifyError(
+      const std::vector<std::pair<uint32, RequestType> >& notifications);
+
+  // Message handlers.
+  void OnDeauthorizeContentLicensesResult(uint32 request_id, bool success);
+
+  // Used only on the UI thread.
+  PepperFlashSettingsManager* manager_;
+
+  // Used only on the I/O thread.
+  FilePath plugin_data_path_;
+
+  // The channel is NULL until we have opened a connection to the broker
+  // process. Used only on the I/O thread.
+  scoped_ptr<IPC::Channel> channel_;
+
+  // Used only on the I/O thread.
+  bool initialized_;
+
+  // Requests that need to be sent once the channel to the broker process is
+  // established. Used only on the I/O thread.
+  std::vector<PendingRequest> pending_requests_;
+  // Requests that have been sent but haven't got replied. Used only on the
+  // I/O thread.
+  std::map<uint32, RequestType> pending_responses_;
+
+  // Path for the current profile. Must be retrieved on the UI thread from the
+  // browser context when we start so we can use it later on the I/O thread.
+  FilePath browser_context_path_;
+
+  scoped_refptr<PluginPrefs> plugin_prefs_;
+};
+
+PepperFlashSettingsManager::Core::Core(PepperFlashSettingsManager* manager,
+                                       content::BrowserContext* browser_context)
+    : manager_(manager),
+      initialized_(false),
+      browser_context_path_(browser_context->GetPath()),
+      plugin_prefs_(PluginPrefs::GetForProfile(
+          Profile::FromBrowserContext(browser_context))) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
+                          base::Bind(&Core::Initialize, this));
+}
+
+PepperFlashSettingsManager::Core::~Core() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+}
+
+void PepperFlashSettingsManager::Core::Detach() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  manager_ = NULL;
+}
+
+void PepperFlashSettingsManager::Core::DeauthorizeContentLicenses(
+    uint32 request_id) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  BrowserThread::PostTask(
+      BrowserThread::IO, FROM_HERE,
+      base::Bind(&Core::DeauthorizeContentLicensesOnIOThread, this,
+                 request_id));
+}
+
+void PepperFlashSettingsManager::Core::GetPpapiChannelInfo(
+    base::ProcessHandle* renderer_handle,
+    int* renderer_id) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  *renderer_handle = base::kNullProcessHandle;
+  *renderer_id = 0;
+}
+
+void PepperFlashSettingsManager::Core::OnPpapiChannelOpened(
+    const IPC::ChannelHandle& channel_handle,
+    int /* plugin_child_id */) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(!initialized_);
+
+  if (!channel_handle.name.empty()) {
+    ConnectToChannel(channel_handle);
+  } else {
+    LOG(ERROR) << "Couldn't open plugin channel";
+    NotifyErrorFromIOThread();
+  }
+
+  // Balance the AddRef() call in Initialize().
+  Release();
+}
+
+bool PepperFlashSettingsManager::Core::OffTheRecord() {
+  return false;
+}
+
+bool PepperFlashSettingsManager::Core::OnMessageReceived(
+    const IPC::Message& message) {
+  IPC_BEGIN_MESSAGE_MAP(Core, message)
+    IPC_MESSAGE_HANDLER(PpapiHostMsg_DeauthorizeContentLicensesResult,
+                        OnDeauthorizeContentLicensesResult)
+    IPC_MESSAGE_UNHANDLED_ERROR()
+  IPC_END_MESSAGE_MAP()
+
+  return true;
+}
+
+void PepperFlashSettingsManager::Core::OnChannelError() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  NotifyErrorFromIOThread();
+}
+
+void PepperFlashSettingsManager::Core::Initialize() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(!initialized_);
+
+  webkit::WebPluginInfo plugin_info;
+  if (!PepperFlashSettingsManager::IsPepperFlashInUse(plugin_prefs_.get(),
+                                                      &plugin_info)) {
+    NotifyErrorFromIOThread();
+    return;
+  }
+
+  // Balanced in OnPpapiChannelOpened(). We need to keep this object around
+  // until then.
+  AddRef();
+
+  FilePath profile_path =
+      browser_context_path_.Append(content::kPepperDataDirname);
+#if defined(OS_WIN)
+  plugin_data_path_ = profile_path.Append(plugin_info.name);
+#else
+  plugin_data_path_ = profile_path.Append(UTF16ToUTF8(plugin_info.name));
+#endif
+
+  PluginServiceImpl* plugin_service = PluginServiceImpl::GetInstance();
+  plugin_service->OpenChannelToPpapiBroker(plugin_info.path, this);
+}
+
+void PepperFlashSettingsManager::Core::ConnectToChannel(
+    const IPC::ChannelHandle& handle) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  DCHECK(!initialized_);
+  DCHECK(!channel_.get());
+
+  channel_.reset(new IPC::Channel(handle, IPC::Channel::MODE_CLIENT, this));
+  if (!channel_->Connect()) {
+    LOG(ERROR) << "Couldn't connect to plugin";
+    NotifyErrorFromIOThread();
+    return;
+  }
+
+  initialized_ = true;
+
+  std::vector<PendingRequest> temp_pending_requests;
+  temp_pending_requests.swap(pending_requests_);
+  for (std::vector<PendingRequest>::iterator iter =
+           temp_pending_requests.begin();
+       iter != temp_pending_requests.end(); ++iter) {
+    switch (iter->type) {
+      case DEAUTHORIZE_CONTENT_LICENSES:
+        DeauthorizeContentLicensesOnIOThread(iter->id);
+        break;
+      default:
+        NOTREACHED();
+        break;
+    }
+  }
+}
+
+void PepperFlashSettingsManager::Core::DeauthorizeContentLicensesOnIOThread(
+    uint32 request_id) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  if (!initialized_) {
+    PendingRequest request;
+    request.id = request_id;
+    request.type = DEAUTHORIZE_CONTENT_LICENSES;
+    pending_requests_.push_back(request);
+    return;
+  }
+
+  pending_responses_.insert(
+      std::make_pair(request_id, DEAUTHORIZE_CONTENT_LICENSES));
+  IPC::Message* msg =
+      new PpapiMsg_DeauthorizeContentLicenses(request_id, plugin_data_path_);
+  if (!channel_->Send(msg)) {
+    LOG(ERROR) << "Couldn't send DeauthorizeContentLicenses message";
+    // A failure notification for the current request will be sent since
+    // |pending_responses_| has been updated.
+    NotifyErrorFromIOThread();
+  }
+}
+
+void PepperFlashSettingsManager::Core::NotifyErrorFromIOThread() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+
+  std::vector<std::pair<uint32, RequestType> > notifications;
+  for (std::vector<PendingRequest>::iterator iter = pending_requests_.begin();
+       iter != pending_requests_.end(); ++iter) {
+    notifications.push_back(std::make_pair(iter->id, iter->type));
+  }
+  pending_requests_.clear();
+  notifications.insert(notifications.end(), pending_responses_.begin(),
+                       pending_responses_.end());
+  pending_responses_.clear();
+
+  BrowserThread::PostTask(
+      BrowserThread::UI, FROM_HERE,
+      base::Bind(&Core::NotifyError, this, notifications));
+}
+
+void
+PepperFlashSettingsManager::Core::NotifyDeauthorizeContentLicensesCompleted(
+    uint32 request_id,
+    bool success) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  if (manager_) {
+    manager_->client_->OnDeauthorizeContentLicensesCompleted(
+        request_id, success);
+  }
+}
+
+void PepperFlashSettingsManager::Core::NotifyError(
+    const std::vector<std::pair<uint32, RequestType> >& notifications) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  scoped_refptr<Core> protector(this);
+  for (std::vector<std::pair<uint32, RequestType> >::const_iterator iter =
+      notifications.begin(); iter != notifications.end(); ++iter) {
+    // Check |manager_| for each iteration in case Detach() happens in one of
+    // the callbacks.
+    if (manager_) {
+      switch (iter->second) {
+        case DEAUTHORIZE_CONTENT_LICENSES:
+          manager_->client_->OnDeauthorizeContentLicensesCompleted(iter->first,
+                                                                   false);
+          break;
+        default:
+          NOTREACHED();
+          break;
+      }
+    }
+  }
+
+  if (manager_)
+    manager_->OnError();
+}
+
+void PepperFlashSettingsManager::Core::OnDeauthorizeContentLicensesResult(
+    uint32 request_id,
+    bool success) {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::IO));
+  LOG_IF(ERROR, !success) << "DeauthorizeContentLicenses returned error";
+
+  std::map<uint32, RequestType>::iterator iter =
+      pending_responses_.find(request_id);
+  if (iter != pending_responses_.end()) {
+    DCHECK_EQ(iter->second, DEAUTHORIZE_CONTENT_LICENSES);
+
+    pending_responses_.erase(iter);
+    BrowserThread::PostTask(
+        BrowserThread::UI, FROM_HERE,
+        base::Bind(&Core::NotifyDeauthorizeContentLicensesCompleted, this,
+                   request_id, success));
+  }
+}
+
+PepperFlashSettingsManager::PepperFlashSettingsManager(
+    Client* client,
+    content::BrowserContext* browser_context)
+    : client_(client),
+      browser_context_(browser_context),
+      next_request_id_(1) {
+  DCHECK(client);
+  DCHECK(browser_context);
+}
+
+PepperFlashSettingsManager::~PepperFlashSettingsManager() {
+  if (core_.get()) {
+    core_->Detach();
+    core_ = NULL;
+  }
+}
+
 // static
 bool PepperFlashSettingsManager::IsPepperFlashInUse(
     PluginPrefs* plugin_prefs,
     webkit::WebPluginInfo* plugin_info) {
   if (!plugin_prefs)
     return false;
 
   PluginServiceImpl* plugin_service = PluginServiceImpl::GetInstance();
   std::vector<webkit::WebPluginInfo> plugins;
   plugin_service->GetPluginInfoArray(
       GURL(), kFlashPluginSwfMimeType, false, &plugins, NULL);
 
   for (std::vector<webkit::WebPluginInfo>::iterator iter = plugins.begin();
        iter != plugins.end(); ++iter) {
     if (webkit::IsPepperPlugin(*iter) && plugin_prefs->IsPluginEnabled(*iter)) {
       if (plugin_info)
         *plugin_info = *iter;
       return true;
     }
   }
   return false;
 }
+
+uint32 PepperFlashSettingsManager::DeauthorizeContentLicenses() {
+  DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
+
+  EnsureCoreExists();
+  uint32 id = GetNextRequestId();
+  core_->DeauthorizeContentLicenses(id);
+  return id;
+}
+
+uint32 PepperFlashSettingsManager::GetNextRequestId() {
+  return next_request_id_++;
+}
+
+void PepperFlashSettingsManager::EnsureCoreExists() {
+  if (!core_.get())
+    core_ = new Core(this, browser_context_);
+}
+
+void PepperFlashSettingsManager::OnError() {
+  if (core_.get()) {
+    core_->Detach();
+    core_ = NULL;
+  } else {
+    NOTREACHED();
+  }
+}
+