src/chrome/browser/media/protected_media_identifier_permission_context.cc

   1 // Copyright 2013 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 #include "chrome/browser/media/protected_media_identifier_permission_context.h"
   6
   7 #include <functional>
   8 #include <string>
   9 #include <vector>
  10
  11 #include "base/bind.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "chrome/browser/content_settings/host_content_settings_map.h"
  14 #include "chrome/browser/content_settings/permission_request_id.h"
  15 #include "chrome/browser/content_settings/tab_specific_content_settings.h"
  16 #include "chrome/browser/extensions/extension_service.h"
  17 #include "chrome/browser/extensions/suggest_permission_util.h"
  18 #include "chrome/browser/profiles/profile.h"
  19 #include "chrome/browser/tab_contents/tab_util.h"
  20 #include "chrome/common/pref_names.h"
  21 #include "content/public/browser/browser_thread.h"
  22 #include "content/public/browser/render_view_host.h"
  23 #include "content/public/browser/web_contents.h"
  24 #include "extensions/browser/extension_system.h"
  25 #include "extensions/browser/view_type_utils.h"
  26 #include "extensions/common/extension.h"
  27
  28 using extensions::APIPermission;
  29
  30 ProtectedMediaIdentifierPermissionContext::
  31     ProtectedMediaIdentifierPermissionContext(Profile* profile)
  32     : profile_(profile), shutting_down_(false) {}
  33
  34 ProtectedMediaIdentifierPermissionContext::
  35     ~ProtectedMediaIdentifierPermissionContext() {
  36   // ProtectedMediaIdentifierPermissionContext may be destroyed on either
  37   // the UI thread or the IO thread, but the PermissionQueueController must have
  38   // been destroyed on the UI thread.
  39   DCHECK(!permission_queue_controller_.get());
  40 }
  41
  42 void ProtectedMediaIdentifierPermissionContext::
  43     RequestProtectedMediaIdentifierPermission(
  44         int render_process_id,
  45         int render_view_id,
  46         int bridge_id,
  47         int group_id,
  48         const GURL& requesting_frame,
  49         const base::Callback<void(bool)>& callback) {
  50   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  51   if (shutting_down_)
  52     return;
  53
  54   content::WebContents* web_contents =
  55       tab_util::GetWebContentsByID(render_process_id, render_view_id);
  56   const PermissionRequestID id(
  57       render_process_id, render_view_id, bridge_id, group_id);
  58
  59   if (extensions::GetViewType(web_contents) !=
  60       extensions::VIEW_TYPE_TAB_CONTENTS) {
  61     // The tab may have gone away, or the request may not be from a tab at all.
  62     LOG(WARNING)
  63         << "Attempt to use protected media identifier in tabless renderer: "
  64         << id.ToString()
  65         << " (can't prompt user without a visible tab)";
  66     NotifyPermissionSet(id, requesting_frame, callback, false);
  67     return;
  68   }
  69
  70   GURL embedder = web_contents->GetLastCommittedURL();
  71   if (!requesting_frame.is_valid() || !embedder.is_valid()) {
  72     LOG(WARNING)
  73         << "Attempt to use protected media identifier from an invalid URL: "
  74         << requesting_frame << "," << embedder
  75         << " (proteced media identifier is not supported in popups)";
  76     NotifyPermissionSet(id, requesting_frame, callback, false);
  77     return;
  78   }
  79
  80   content::RenderViewHost* rvh = web_contents->GetRenderViewHost();
  81   DecidePermission(id, requesting_frame, embedder, rvh, callback);
  82 }
  83
  84 void ProtectedMediaIdentifierPermissionContext::
  85     CancelProtectedMediaIdentifierPermissionRequests(int group_id) {
  86   CancelPendingInfobarRequests(group_id);
  87 }
  88
  89 void ProtectedMediaIdentifierPermissionContext::DecidePermission(
  90     const PermissionRequestID& id,
  91     const GURL& requesting_frame,
  92     const GURL& embedder,
  93     content::RenderViewHost* rvh,
  94     const base::Callback<void(bool)>& callback) {
  95   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
  96
  97 #if defined(OS_ANDROID)
  98   // Check if the protected media identifier master switch is disabled.
  99   if (!profile()->GetPrefs()->GetBoolean(
 100         prefs::kProtectedMediaIdentifierEnabled)) {
 101     PermissionDecided(id, requesting_frame, embedder, callback, false);
 102     return;
 103   }
 104 #endif
 105
 106   ContentSetting content_setting =
 107      profile_->GetHostContentSettingsMap()->GetContentSetting(
 108           requesting_frame,
 109           embedder,
 110           CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER,
 111           std::string());
 112   switch (content_setting) {
 113     case CONTENT_SETTING_BLOCK:
 114       PermissionDecided(id, requesting_frame, embedder, callback, false);
 115       break;
 116     case CONTENT_SETTING_ALLOW:
 117       PermissionDecided(id, requesting_frame, embedder, callback, true);
 118       break;
 119     case CONTENT_SETTING_ASK:
 120       QueueController()->CreateInfoBarRequest(
 121           id,
 122           requesting_frame,
 123           embedder,
 124           base::Bind(&ProtectedMediaIdentifierPermissionContext::
 125                           NotifyPermissionSet,
 126                      base::Unretained(this),
 127                      id,
 128                      requesting_frame,
 129                      callback));
 130       rvh->DisableFullscreenEncryptedMediaPlayback();
 131       break;
 132     default:
 133       NOTREACHED();
 134   }
 135 }
 136
 137 void ProtectedMediaIdentifierPermissionContext::ShutdownOnUIThread() {
 138   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 139   permission_queue_controller_.reset();
 140   shutting_down_ = true;
 141 }
 142
 143 void ProtectedMediaIdentifierPermissionContext::PermissionDecided(
 144     const PermissionRequestID& id,
 145     const GURL& requesting_frame,
 146     const GURL& embedder,
 147     const base::Callback<void(bool)>& callback,
 148     bool allowed) {
 149   NotifyPermissionSet(id, requesting_frame, callback, allowed);
 150 }
 151
 152 void ProtectedMediaIdentifierPermissionContext::NotifyPermissionSet(
 153     const PermissionRequestID& id,
 154     const GURL& requesting_frame,
 155     const base::Callback<void(bool)>& callback,
 156     bool allowed) {
 157   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 158
 159   // WebContents may have gone away.
 160   TabSpecificContentSettings* content_settings =
 161       TabSpecificContentSettings::Get(id.render_process_id(),
 162                                       id.render_view_id());
 163   if (content_settings) {
 164     content_settings->OnProtectedMediaIdentifierPermissionSet(
 165         requesting_frame.GetOrigin(), allowed);
 166   }
 167
 168   callback.Run(allowed);
 169 }
 170
 171 PermissionQueueController*
 172     ProtectedMediaIdentifierPermissionContext::QueueController() {
 173   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 174   DCHECK(!shutting_down_);
 175   if (!permission_queue_controller_)
 176     permission_queue_controller_.reset(CreateQueueController());
 177   return permission_queue_controller_.get();
 178 }
 179
 180 PermissionQueueController*
 181     ProtectedMediaIdentifierPermissionContext::CreateQueueController() {
 182   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 183   return new PermissionQueueController(
 184       profile(), CONTENT_SETTINGS_TYPE_PROTECTED_MEDIA_IDENTIFIER);
 185 }
 186
 187 void
 188 ProtectedMediaIdentifierPermissionContext::CancelPendingInfobarRequests(
 189     int group_id) {
 190   if (!content::BrowserThread::CurrentlyOn(content::BrowserThread::UI)) {
 191     content::BrowserThread::PostTask(
 192         content::BrowserThread::UI,
 193         FROM_HERE,
 194         base::Bind(&ProtectedMediaIdentifierPermissionContext::
 195                         CancelPendingInfobarRequests,
 196                    this,
 197                    group_id));
 198     return;
 199   }
 200   DCHECK(content::BrowserThread::CurrentlyOn(content::BrowserThread::UI));
 201   if (shutting_down_)
 202     return;
 203   QueueController()->CancelInfoBarRequests(group_id);
 204 }