blob: 96cd201d97287ae2f916671f74a1aa73d9b14f3a [file] [log] [blame]
// Copyright 2018 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.
#include <memory>
#include "base/callback.h"
#include "base/component_export.h"
#include "base/macros.h"
#include "base/memory/weak_ptr.h"
#include "base/time/time.h"
namespace disk_cache {
class Backend;
namespace net {
class URLRequestContext;
namespace network {
// Helper to count data in HTTP cache.
// Export is for testing only.
using HttpCacheDataCounterCallback = base::OnceCallback<
void(HttpCacheDataCounter*, bool upper_bound, int64_t size_or_error)>;
// Computes the amount of disk space taken up by entries last used between
// [start_time, end_time), and return it, or error. Note that there may be
// some approximation with respect to both bytes and dates.
// Furthermore, if there is no efficient way of computing this information,
// a very loose upper bound (e.g. total disk space used by the cache) may be
// returned; in that case |upper_bound| will be set to true.
// Once complete, invokes |callback|, passing |this| and result.
// If either |this| or |url_request_context| get destroyed, |callback|
// will not be invoked.
static std::unique_ptr<HttpCacheDataCounter> CreateAndStart(
net::URLRequestContext* url_request_context,
base::Time start_time,
base::Time end_time,
HttpCacheDataCounterCallback callback);
HttpCacheDataCounter(base::Time start_time,
base::Time end_time,
HttpCacheDataCounterCallback callback);
void GotBackend(std::unique_ptr<disk_cache::Backend*> backend,
int error_code);
void PostResult(bool is_upper_limit, int64_t result_or_error);
base::WeakPtr<HttpCacheDataCounter> GetWeakPtr() {
return weak_factory_.GetWeakPtr();
base::Time start_time_;
base::Time end_time_;
HttpCacheDataCounterCallback callback_;
base::WeakPtrFactory<HttpCacheDataCounter> weak_factory_;
} // namespace network