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// Copyright 2016 The Chromium Authors
// 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/functional/callback_forward.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner_helpers.h"
#include "net/base/completion_once_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/code cache data from a StoragePartition.
class ConditionalCacheDeletionHelper {
public:
// Creates a helper to delete |cache| entries that match the |condition|.
ConditionalCacheDeletionHelper(
disk_cache::Backend* cache,
base::RepeatingCallback<bool(const disk_cache::Entry*)> condition);
ConditionalCacheDeletionHelper(const ConditionalCacheDeletionHelper&) =
delete;
ConditionalCacheDeletionHelper& operator=(
const ConditionalCacheDeletionHelper&) = delete;
// 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 obtained by passing the key to the
// |get_url_from_key| is matched by the |url_predicate|. The
// |get_url_from_key| method is useful when the entries are not keyed by the
// resource url alone. For ex: using two keys for site isolation.
static base::RepeatingCallback<bool(const disk_cache::Entry*)>
CreateURLAndTimeCondition(
base::RepeatingCallback<bool(const GURL&)> url_predicate,
base::RepeatingCallback<std::string(const std::string&)> get_url_from_key,
base::Time begin_time,
base::Time end_time);
// Deletes the cache entries according to the specified condition. Destroys
// this instance of ConditionalCacheDeletionHelper when finished.
//
// 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(
net::CompletionOnceCallback completion_callback);
private:
friend class base::DeleteHelper<ConditionalCacheDeletionHelper>;
~ConditionalCacheDeletionHelper();
void IterateOverEntries(disk_cache::EntryResult result);
raw_ptr<disk_cache::Backend> cache_;
const base::RepeatingCallback<bool(const disk_cache::Entry*)> condition_;
net::CompletionOnceCallback completion_callback_;
SEQUENCE_CHECKER(sequence_checker_);
std::unique_ptr<disk_cache::Backend::Iterator> iterator_;
raw_ptr<disk_cache::Entry> previous_entry_;
};
} // namespace content
#endif // CONTENT_BROWSER_BROWSING_DATA_CONDITIONAL_CACHE_DELETION_HELPER_H_
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