| // Copyright (c) 2013 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. |
| |
| #ifndef CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_ |
| #define CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_ |
| |
| #include <string> |
| |
| #include "base/basictypes.h" |
| #include "base/callback.h" |
| #include "base/files/file_path.h" |
| #include "base/memory/weak_ptr.h" |
| #include "base/threading/sequenced_worker_pool.h" |
| #include "chrome/browser/extensions/updater/extension_downloader_delegate.h" |
| #include "content/public/browser/notification_observer.h" |
| #include "content/public/browser/notification_registrar.h" |
| |
| namespace base { |
| class DictionaryValue; |
| } |
| |
| namespace extensions { |
| class ExtensionDownloader; |
| } |
| |
| namespace net { |
| class URLRequestContextGetter; |
| } |
| |
| namespace tracked_objects { |
| class Location; |
| } |
| |
| namespace chromeos { |
| |
| // The ExternalCache manages cache for external extensions. |
| class ExternalCache : public content::NotificationObserver, |
| public extensions::ExtensionDownloaderDelegate { |
| public: |
| class Delegate { |
| public: |
| virtual ~Delegate() {} |
| // Caller owns |prefs|. |
| virtual void OnExtensionListsUpdated( |
| const base::DictionaryValue* prefs) = 0; |
| }; |
| |
| // The |request_context| is used for the update checks. |
| // By default updates are checked for the extensions with external_update_url. |
| // If |always_check_webstore| set, updates will be check for external_crx too. |
| ExternalCache(const std::string& cache_dir, |
| net::URLRequestContextGetter* request_context, |
| Delegate* delegate, |
| bool always_check_updates); |
| virtual ~ExternalCache(); |
| |
| // Returns already cached extensions. |
| const base::DictionaryValue* cached_extensions() { |
| return cached_extensions_.get(); |
| } |
| |
| // Update list of extensions in cache and force update check for them. |
| // ExternalCache gets ownership of |prefs|. |
| void UpdateExtensionsList(scoped_ptr<base::DictionaryValue> prefs); |
| |
| // If a user of one of the ExternalCache's extensions detects that |
| // the extension is damaged then this method can be used to remove it from |
| // the cache and retry to download it after a restart. |
| void OnDamagedFileDetected(const base::FilePath& path); |
| |
| protected: |
| // Implementation of content::NotificationObserver: |
| virtual void Observe(int type, |
| const content::NotificationSource& source, |
| const content::NotificationDetails& details) OVERRIDE; |
| |
| // Implementation of ExtensionDownloaderDelegate: |
| virtual void OnExtensionDownloadFailed( |
| const std::string& id, |
| Error error, |
| const PingResult& ping_result, |
| const std::set<int>& request_ids) OVERRIDE; |
| |
| virtual void OnExtensionDownloadFinished( |
| const std::string& id, |
| const base::FilePath& path, |
| const GURL& download_url, |
| const std::string& version, |
| const PingResult& ping_result, |
| const std::set<int>& request_ids) OVERRIDE; |
| |
| virtual void OnBlacklistDownloadFinished( |
| const std::string& data, |
| const std::string& package_hash, |
| const std::string& version, |
| const PingResult& ping_result, |
| const std::set<int>& request_ids) OVERRIDE; |
| |
| virtual bool IsExtensionPending(const std::string& id) OVERRIDE; |
| |
| virtual bool GetExtensionExistingVersion(const std::string& id, |
| std::string* version) OVERRIDE; |
| |
| // Starts a cache update check immediately. |
| void CheckCacheNow(); |
| |
| // Notifies the that the cache has been updated, providing |
| // extensions loader with an updated list of extensions. |
| void UpdateExtensionLoader(); |
| |
| // Performs a cache update check on the blocking pool. |external_cache| is |
| // used to reply in the UI thread. |prefs| contains the list extensions |
| // anything else is invalid, and should be removed from the cache. |
| // Ownership of |prefs| is transferred to this function. |
| static void BlockingCheckCache( |
| base::WeakPtr<ExternalCache> external_cache, |
| const std::string& app_cache_dir, |
| scoped_ptr<base::DictionaryValue> prefs); |
| |
| // Helper for BlockingCheckCache(), updates |prefs|. |
| static void BlockingCheckCacheInternal( |
| const std::string& app_cache_dir, |
| base::DictionaryValue* prefs); |
| |
| // Invoked when the cache has been updated. |prefs| contains all the currently |
| // valid crx files in the cache, ownerships is transfered to this function. |
| void OnCacheUpdated(scoped_ptr<base::DictionaryValue> prefs); |
| |
| // Invoked to install the downloaded crx file at |path| in the cache. |
| static void BlockingInstallCacheEntry( |
| base::WeakPtr<ExternalCache> external_cache, |
| const std::string& app_cache_dir, |
| const std::string& id, |
| const base::FilePath& path, |
| const std::string& version); |
| |
| // Invoked on the UI thread when a new entry has been installed in the cache. |
| void OnCacheEntryInstalled(const std::string& id, |
| const std::string& path, |
| const std::string& version); |
| |
| // Helper to post blocking IO tasks to the blocking pool. |
| void PostBlockingTask(const tracked_objects::Location& from_here, |
| const base::Closure& task); |
| |
| // Path to the dir where apps cache is stored. |
| std::string cache_dir_; |
| |
| // Request context used by the |downloader_|. |
| net::URLRequestContextGetter* request_context_; |
| |
| // Delegate that would like to get notifications about cache updates. |
| Delegate* delegate_; |
| |
| // Updates needs to be check for the extensions with external_crx too. |
| bool always_check_updates_; |
| |
| // This is the list of extensions currently configured. |
| scoped_ptr<base::DictionaryValue> extensions_; |
| |
| // This contains extensions that are both currently configured |
| // and that have a valid crx in the cache. |
| scoped_ptr<base::DictionaryValue> cached_extensions_; |
| |
| // Used to download the extensions and to check for updates. |
| scoped_ptr<extensions::ExtensionDownloader> downloader_; |
| |
| base::WeakPtrFactory<ExternalCache> weak_ptr_factory_; |
| |
| // Observes failures to install CRX files. |
| content::NotificationRegistrar notification_registrar_; |
| |
| // Unique sequence token so that tasks posted by the ExternalCache are |
| // executed sequentially in the blocking pool. |
| base::SequencedWorkerPool::SequenceToken worker_pool_token_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ExternalCache); |
| }; |
| |
| } // namespace chromeos |
| |
| #endif // CHROME_BROWSER_CHROMEOS_EXTENSIONS_EXTERNAL_CACHE_H_ |