components/browsing_data/storage_partition_http_cache_data_remover.h

   1 // Copyright 2015 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 COMPONENTS_BROWSING_DATA_STORAGE_PARTITION_HTTP_CACHE_DATA_REMOVER_H_
   6 #define COMPONENTS_BROWSING_DATA_STORAGE_PARTITION_HTTP_CACHE_DATA_REMOVER_H_
   7
   8 #include "base/callback.h"
   9 #include "base/sequenced_task_runner_helpers.h"
  10 #include "base/time/time.h"
  11
  12 namespace content {
  13 class StoragePartition;
  14 }
  15
  16 namespace disk_cache {
  17 class Backend;
  18 }
  19
  20 namespace net {
  21 class URLRequestContextGetter;
  22 }
  23
  24 namespace browsing_data {
  25
  26 // Helper to remove http cache data from a StoragePartition.
  27 class StoragePartitionHttpCacheDataRemover {
  28  public:
  29   static StoragePartitionHttpCacheDataRemover* CreateForRange(
  30       content::StoragePartition* storage_partition,
  31       base::Time delete_begin,
  32       base::Time delete_end);
  33
  34   // Calls |done_callback| upon completion and also destroys itself.
  35   void Remove(const base::Closure& done_callback);
  36
  37  private:
  38   enum CacheState {
  39     STATE_NONE,
  40     STATE_CREATE_MAIN,
  41     STATE_CREATE_MEDIA,
  42     STATE_DELETE_MAIN,
  43     STATE_DELETE_MEDIA,
  44     STATE_DONE
  45   };
  46
  47   StoragePartitionHttpCacheDataRemover(
  48       base::Time delete_begin,
  49       base::Time delete_end,
  50       net::URLRequestContextGetter* main_context_getter,
  51       net::URLRequestContextGetter* media_context_getter);
  52
  53   // StoragePartitionHttpCacheDataRemover deletes itself (using DeleteHelper)
  54   // and is not supposed to be deleted by other objects so make destructor
  55   // private and DeleteHelper a friend.
  56   friend class base::DeleteHelper<StoragePartitionHttpCacheDataRemover>;
  57
  58   ~StoragePartitionHttpCacheDataRemover();
  59
  60   void ClearHttpCacheOnIOThread();
  61   void ClearedHttpCache();
  62   // Performs the actual work to delete the cache.
  63   void DoClearCache(int rv);
  64
  65   const base::Time delete_begin_;
  66   const base::Time delete_end_;
  67
  68   const scoped_refptr<net::URLRequestContextGetter> main_context_getter_;
  69   const scoped_refptr<net::URLRequestContextGetter> media_context_getter_;
  70
  71   base::Closure done_callback_;
  72
  73   // IO.
  74   int next_cache_state_;
  75   disk_cache::Backend* cache_;
  76
  77   DISALLOW_COPY_AND_ASSIGN(StoragePartitionHttpCacheDataRemover);
  78 };
  79
  80 }  // namespace browsing_data
  81
  82 #endif  // COMPONENTS_BROWSING_DATA_STORAGE_PARTITION_HTTP_CACHE_DATA_REMOVER_H_