chrome/browser/extensions/updater/extension_cache_impl.h

   1 // Copyright 2014 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_UPDATER_EXTENSION_CACHE_IMPL_H_
   6 #define CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_
   7
   8 #include <set>
   9 #include <string>
  10 #include <vector>
  11
  12 #include "base/callback_forward.h"
  13 #include "base/files/file_path.h"
  14 #include "base/memory/scoped_ptr.h"
  15 #include "base/memory/weak_ptr.h"
  16 #include "content/public/browser/notification_observer.h"
  17 #include "content/public/browser/notification_registrar.h"
  18 #include "extensions/browser/updater/extension_cache.h"
  19
  20 namespace base {
  21 template <typename T> struct DefaultSingletonTraits;
  22 }
  23
  24 namespace extensions {
  25
  26 class ExtensionCacheDelegate;
  27 class LocalExtensionCache;
  28
  29 // Singleton call that caches extensions .crx files to share them between
  30 // multiple users and profiles on the machine.
  31 class ExtensionCacheImpl : public ExtensionCache,
  32                            public content::NotificationObserver {
  33  public:
  34   explicit ExtensionCacheImpl(scoped_ptr<ExtensionCacheDelegate> delegate);
  35   ~ExtensionCacheImpl() override;
  36
  37   // Implementation of ExtensionCache.
  38   void Start(const base::Closure& callback) override;
  39   void Shutdown(const base::Closure& callback) override;
  40   void AllowCaching(const std::string& id) override;
  41   bool GetExtension(const std::string& id,
  42                     const std::string& expected_hash,
  43                     base::FilePath* file_path,
  44                     std::string* version) override;
  45   void PutExtension(const std::string& id,
  46                     const std::string& expected_hash,
  47                     const base::FilePath& file_path,
  48                     const std::string& version,
  49                     const PutExtensionCallback& callback) override;
  50
  51   // Implementation of content::NotificationObserver:
  52   void Observe(int type,
  53                const content::NotificationSource& source,
  54                const content::NotificationDetails& details) override;
  55
  56  private:
  57   // Callback that is called when local cache is ready.
  58   void OnCacheInitialized();
  59
  60   // Check if this extension is allowed to be cached.
  61   bool CachingAllowed(const std::string& id);
  62
  63   // Cache implementation that uses local cache dir.
  64   scoped_ptr<LocalExtensionCache> cache_;
  65
  66   // Set of extensions that can be cached.
  67   std::set<std::string> allowed_extensions_;
  68
  69   // List of callbacks that should be called when the cache is ready.
  70   std::vector<base::Closure> init_callbacks_;
  71
  72   // Observes failures to install CRX files.
  73   content::NotificationRegistrar notification_registrar_;
  74
  75   // Weak factory for callbacks.
  76   base::WeakPtrFactory<ExtensionCacheImpl> weak_ptr_factory_;
  77
  78   DISALLOW_COPY_AND_ASSIGN(ExtensionCacheImpl);
  79 };
  80
  81 }  // namespace extensions
  82
  83 #endif  // CHROME_BROWSER_EXTENSIONS_UPDATER_EXTENSION_CACHE_IMPL_H_