chrome/browser/extensions/webstore_installer.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 #ifndef CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_
   6 #define CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_
   7
   8 #include <list>
   9 #include <string>
  10
  11 #include "base/compiler_specific.h"
  12 #include "base/memory/ref_counted.h"
  13 #include "base/memory/scoped_ptr.h"
  14 #include "base/supports_user_data.h"
  15 #include "base/timer/timer.h"
  16 #include "base/values.h"
  17 #include "base/version.h"
  18 #include "chrome/browser/extensions/extension_install_prompt.h"
  19 #include "content/public/browser/browser_thread.h"
  20 #include "content/public/browser/download_interrupt_reasons.h"
  21 #include "content/public/browser/download_item.h"
  22 #include "content/public/browser/notification_observer.h"
  23 #include "content/public/browser/notification_registrar.h"
  24 #include "content/public/browser/web_contents_observer.h"
  25 #include "extensions/common/manifest_handlers/shared_module_info.h"
  26 #include "ui/gfx/image/image_skia.h"
  27 #include "url/gurl.h"
  28
  29 class Profile;
  30
  31 namespace base {
  32 class FilePath;
  33 }
  34
  35 namespace content {
  36 class WebContents;
  37 }
  38
  39 namespace extensions {
  40
  41 class CrxInstaller;
  42 class Extension;
  43 class Manifest;
  44
  45 // Downloads and installs extensions from the web store.
  46 class WebstoreInstaller : public content::NotificationObserver,
  47                           public content::DownloadItem::Observer,
  48                           public content::WebContentsObserver,
  49                           public base::RefCountedThreadSafe<
  50   WebstoreInstaller, content::BrowserThread::DeleteOnUIThread> {
  51  public:
  52   enum InstallSource {
  53     // Inline installs trigger slightly different behavior (install source
  54     // is different, download referrers are the item's page in the gallery).
  55     INSTALL_SOURCE_INLINE,
  56     INSTALL_SOURCE_APP_LAUNCHER,
  57     INSTALL_SOURCE_OTHER
  58   };
  59
  60   enum FailureReason {
  61     FAILURE_REASON_CANCELLED,
  62     FAILURE_REASON_DEPENDENCY_NOT_FOUND,
  63     FAILURE_REASON_DEPENDENCY_NOT_SHARED_MODULE,
  64     FAILURE_REASON_OTHER
  65   };
  66
  67   enum ManifestCheckLevel {
  68     // Do not check for any manifest equality.
  69     MANIFEST_CHECK_LEVEL_NONE,
  70
  71     // Only check that the expected and actual permissions have the same
  72     // effective permissions.
  73     MANIFEST_CHECK_LEVEL_LOOSE,
  74
  75     // All data in the expected and actual manifests must match.
  76     MANIFEST_CHECK_LEVEL_STRICT,
  77   };
  78
  79   class Delegate {
  80    public:
  81     virtual void OnExtensionDownloadStarted(const std::string& id,
  82                                             content::DownloadItem* item);
  83     virtual void OnExtensionDownloadProgress(const std::string& id,
  84                                              content::DownloadItem* item);
  85     virtual void OnExtensionInstallSuccess(const std::string& id) = 0;
  86     virtual void OnExtensionInstallFailure(const std::string& id,
  87                                            const std::string& error,
  88                                            FailureReason reason) = 0;
  89
  90    protected:
  91     virtual ~Delegate() {}
  92   };
  93
  94   // Contains information about what parts of the extension install process can
  95   // be skipped or modified. If one of these is present, it means that a CRX
  96   // download was initiated by WebstoreInstaller. The Approval instance should
  97   // be checked further for additional details.
  98   struct Approval : public base::SupportsUserData::Data {
  99     static scoped_ptr<Approval> CreateWithInstallPrompt(Profile* profile);
 100
 101     // Creates an Approval for installing a shared module.
 102     static scoped_ptr<Approval> CreateForSharedModule(Profile* profile);
 103
 104     // Creates an Approval that will skip putting up an install confirmation
 105     // prompt if the actual manifest from the extension to be installed matches
 106     // |parsed_manifest|. The |strict_manifest_check| controls whether we want
 107     // to require an exact manifest match, or are willing to tolerate a looser
 108     // check just that the effective permissions are the same.
 109     static scoped_ptr<Approval> CreateWithNoInstallPrompt(
 110         Profile* profile,
 111         const std::string& extension_id,
 112         scoped_ptr<base::DictionaryValue> parsed_manifest,
 113         bool strict_manifest_check);
 114
 115     virtual ~Approval();
 116
 117     // The extension id that was approved for installation.
 118     std::string extension_id;
 119
 120     // The profile the extension should be installed into.
 121     Profile* profile;
 122
 123     // The expected manifest, before localization.
 124     scoped_ptr<Manifest> manifest;
 125
 126     // Whether to use a bubble notification when an app is installed, instead of
 127     // the default behavior of transitioning to the new tab page.
 128     bool use_app_installed_bubble;
 129
 130     // Whether to skip the post install UI like the extension installed bubble.
 131     bool skip_post_install_ui;
 132
 133     // Whether to skip the install dialog once the extension has been downloaded
 134     // and unpacked. One reason this can be true is that in the normal webstore
 135     // installation, the dialog is shown earlier, before any download is done,
 136     // so there's no need to show it again.
 137     bool skip_install_dialog;
 138
 139     // Whether we should enable the launcher before installing the app.
 140     bool enable_launcher;
 141
 142     // Manifest check level for checking actual manifest against expected
 143     // manifest.
 144     ManifestCheckLevel manifest_check_level;
 145
 146     // Used to show the install dialog.
 147     ExtensionInstallPrompt::ShowDialogCallback show_dialog_callback;
 148
 149     // The icon to use to display the extension while it is installing.
 150     gfx::ImageSkia installing_icon;
 151
 152     // A dummy extension created from |manifest|;
 153     scoped_refptr<Extension> dummy_extension;
 154
 155     // Required minimum version.
 156     scoped_ptr<Version> minimum_version;
 157
 158     // Ephemeral apps (experimental) are not permanently installed in Chrome.
 159     bool is_ephemeral;
 160
 161    private:
 162     Approval();
 163   };
 164
 165   // Gets the Approval associated with the |download|, or NULL if there's none.
 166   // Note that the Approval is owned by |download|.
 167   static const Approval* GetAssociatedApproval(
 168       const content::DownloadItem& download);
 169
 170   // Creates a WebstoreInstaller for downloading and installing the extension
 171   // with the given |id| from the Chrome Web Store. If |delegate| is not NULL,
 172   // it will be notified when the install succeeds or fails. The installer will
 173   // use the specified |controller| to download the extension. Only one
 174   // WebstoreInstaller can use a specific controller at any given time. This
 175   // also associates the |approval| with this install.
 176   // Note: the delegate should stay alive until being called back.
 177   WebstoreInstaller(Profile* profile,
 178                     Delegate* delegate,
 179                     content::WebContents* web_contents,
 180                     const std::string& id,
 181                     scoped_ptr<Approval> approval,
 182                     InstallSource source);
 183
 184   // Starts downloading and installing the extension.
 185   void Start();
 186
 187   // content::NotificationObserver
 188   virtual void Observe(int type,
 189                        const content::NotificationSource& source,
 190                        const content::NotificationDetails& details) OVERRIDE;
 191
 192   // Removes the reference to the delegate passed in the constructor. Used when
 193   // the delegate object must be deleted before this object.
 194   void InvalidateDelegate();
 195
 196   // Instead of using the default download directory, use |directory| instead.
 197   // This does *not* transfer ownership of |directory|.
 198   static void SetDownloadDirectoryForTests(base::FilePath* directory);
 199
 200  private:
 201   FRIEND_TEST_ALL_PREFIXES(WebstoreInstallerTest, PlatformParams);
 202   friend struct content::BrowserThread::DeleteOnThread<
 203    content::BrowserThread::UI>;
 204   friend class base::DeleteHelper<WebstoreInstaller>;
 205   virtual ~WebstoreInstaller();
 206
 207   // Helper to get install URL.
 208   static GURL GetWebstoreInstallURL(const std::string& extension_id,
 209                                     InstallSource source);
 210
 211   // DownloadManager::DownloadUrl callback.
 212   void OnDownloadStarted(content::DownloadItem* item,
 213                          content::DownloadInterruptReason interrupt_reason);
 214
 215   // DownloadItem::Observer implementation:
 216   virtual void OnDownloadUpdated(content::DownloadItem* download) OVERRIDE;
 217   virtual void OnDownloadDestroyed(content::DownloadItem* download) OVERRIDE;
 218
 219   // Downloads next pending module in |pending_modules_|.
 220   void DownloadNextPendingModule();
 221
 222   // Downloads and installs a single Crx with the given |extension_id|.
 223   // This function is used for both the extension Crx and dependences.
 224   void DownloadCrx(const std::string& extension_id, InstallSource source);
 225
 226   // Starts downloading the extension to |file_path|.
 227   void StartDownload(const base::FilePath& file_path);
 228
 229   // Updates the InstallTracker with the latest download progress.
 230   void UpdateDownloadProgress();
 231
 232   // Creates and starts CrxInstaller for the downloaded extension package.
 233   void StartCrxInstaller(const content::DownloadItem& item);
 234
 235   // Reports an install |error| to the delegate for the given extension if this
 236   // managed its installation. This also removes the associated PendingInstall.
 237   void ReportFailure(const std::string& error, FailureReason reason);
 238
 239   // Reports a successful install to the delegate for the given extension if
 240   // this managed its installation. This also removes the associated
 241   // PendingInstall.
 242   void ReportSuccess();
 243
 244   // Records stats regarding an interrupted webstore download item.
 245   void RecordInterrupt(const content::DownloadItem* download) const;
 246
 247   content::NotificationRegistrar registrar_;
 248   Profile* profile_;
 249   Delegate* delegate_;
 250   std::string id_;
 251   InstallSource install_source_;
 252   // The DownloadItem is owned by the DownloadManager and is valid from when
 253   // OnDownloadStarted is called (with no error) until OnDownloadDestroyed().
 254   content::DownloadItem* download_item_;
 255   // Used to periodically update the extension's download status. This will
 256   // trigger at least every second, though sometimes more frequently (depending
 257   // on number of modules, etc).
 258   base::OneShotTimer<WebstoreInstaller> download_progress_timer_;
 259   scoped_ptr<Approval> approval_;
 260   GURL download_url_;
 261   scoped_refptr<CrxInstaller> crx_installer_;
 262
 263   // Pending modules.
 264   std::list<SharedModuleInfo::ImportInfo> pending_modules_;
 265   // Total extension modules we need download and install (the main module and
 266   // depedences).
 267   int total_modules_;
 268   bool download_started_;
 269 };
 270
 271 }  // namespace extensions
 272
 273 #endif  // CHROME_BROWSER_EXTENSIONS_WEBSTORE_INSTALLER_H_