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