| // Copyright 2016 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 CONTENT_BROWSER_BROWSING_DATA_CONDITIONAL_CACHE_DELETION_HELPER_H_ |
| #define CONTENT_BROWSER_BROWSING_DATA_CONDITIONAL_CACHE_DELETION_HELPER_H_ |
| |
| #include <memory> |
| |
| #include "base/callback_forward.h" |
| #include "base/sequenced_task_runner_helpers.h" |
| #include "content/common/content_export.h" |
| #include "net/base/completion_callback.h" |
| #include "net/base/net_errors.h" |
| #include "net/disk_cache/disk_cache.h" |
| #include "url/gurl.h" |
| |
| namespace disk_cache { |
| class Entry; |
| } |
| |
| namespace content { |
| |
| // Helper to remove http cache data from a StoragePartition. |
| class CONTENT_EXPORT ConditionalCacheDeletionHelper { |
| public: |
| // Creates a helper to delete |cache| entries that match the |condition|. |
| // Must be created on the IO thread! |
| ConditionalCacheDeletionHelper( |
| disk_cache::Backend* cache, |
| const base::Callback<bool(const disk_cache::Entry*)>& condition); |
| |
| // A convenience method to create a condition matching cache entries whose |
| // last modified time is between |begin_time| (inclusively), |end_time| |
| // (exclusively) and whose URL is matched by the |url_predicate|. Note that |
| // |begin_time| and |end_time| can be null to indicate unbounded time interval |
| // in their respective direction. |
| static base::Callback<bool(const disk_cache::Entry*)> |
| CreateURLAndTimeCondition( |
| const base::Callback<bool(const GURL&)>& url_predicate, |
| const base::Time& begin_time, |
| const base::Time& end_time); |
| |
| // Deletes the cache entries according to the specified condition. Destroys |
| // this instance of ConditionalCacheDeletionHelper when finished. |
| // Must be called on the IO thread! |
| // |
| // The return value is a net error code. If this method returns |
| // ERR_IO_PENDING, the |completion_callback| will be invoked when the |
| // operation completes. |
| int DeleteAndDestroySelfWhenFinished( |
| const net::CompletionCallback& completion_callback); |
| |
| private: |
| friend class base::DeleteHelper<ConditionalCacheDeletionHelper>; |
| ~ConditionalCacheDeletionHelper(); |
| |
| void IterateOverEntries(int error); |
| |
| disk_cache::Backend* cache_; |
| const base::Callback<bool(const disk_cache::Entry*)> condition_; |
| |
| net::CompletionCallback completion_callback_; |
| |
| std::unique_ptr<disk_cache::Backend::Iterator> iterator_; |
| disk_cache::Entry* current_entry_; |
| disk_cache::Entry* previous_entry_; |
| |
| DISALLOW_COPY_AND_ASSIGN(ConditionalCacheDeletionHelper); |
| }; |
| |
| } // namespace content |
| |
| #endif // CONTENT_BROWSER_BROWSING_DATA_CONDITIONAL_CACHE_DELETION_HELPER_H_ |