| // 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 "services/network/conditional_cache_deletion_helper.h" |
| |
| #include "base/bind.h" |
| #include "base/callback.h" |
| #include "base/location.h" |
| #include "base/single_thread_task_runner.h" |
| #include "base/threading/thread_task_runner_handle.h" |
| #include "net/http/http_cache.h" |
| #include "net/http/http_util.h" |
| |
| namespace { |
| |
| bool EntryPredicateFromURLsAndTime( |
| const base::RepeatingCallback<bool(const GURL&)>& url_matcher, |
| const base::Time& begin_time, |
| const base::Time& end_time, |
| const disk_cache::Entry* entry) { |
| std::string entry_key(entry->GetKey()); |
| std::string url_string( |
| net::HttpCache::GetResourceURLFromHttpCacheKey(entry_key)); |
| return (entry->GetLastUsed() >= begin_time && |
| entry->GetLastUsed() < end_time && url_matcher.Run(GURL(url_string))); |
| } |
| |
| } // namespace |
| |
| namespace network { |
| |
| // static |
| std::unique_ptr<ConditionalCacheDeletionHelper> |
| ConditionalCacheDeletionHelper::CreateAndStart( |
| disk_cache::Backend* cache, |
| const base::RepeatingCallback<bool(const GURL&)>& url_matcher, |
| const base::Time& begin_time, |
| const base::Time& end_time, |
| base::OnceClosure completion_callback) { |
| std::unique_ptr<ConditionalCacheDeletionHelper> deletion_helper( |
| new ConditionalCacheDeletionHelper( |
| base::BindRepeating( |
| &EntryPredicateFromURLsAndTime, url_matcher, |
| begin_time.is_null() ? base::Time() : begin_time, |
| end_time.is_null() ? base::Time::Max() : end_time), |
| std::move(completion_callback), cache->CreateIterator())); |
| |
| // Any status other than OK (since no entry), IO_PENDING, or FAILED would |
| // work here. |
| deletion_helper->IterateOverEntries( |
| disk_cache::EntryResult::MakeError(net::ERR_CACHE_OPEN_FAILURE)); |
| return deletion_helper; |
| } |
| |
| ConditionalCacheDeletionHelper::ConditionalCacheDeletionHelper( |
| const base::RepeatingCallback<bool(const disk_cache::Entry*)>& condition, |
| base::OnceClosure completion_callback, |
| std::unique_ptr<disk_cache::Backend::Iterator> iterator) |
| : condition_(condition), |
| completion_callback_(std::move(completion_callback)), |
| iterator_(std::move(iterator)) {} |
| |
| ConditionalCacheDeletionHelper::~ConditionalCacheDeletionHelper() = default; |
| |
| void ConditionalCacheDeletionHelper::IterateOverEntries( |
| disk_cache::EntryResult result) { |
| while (result.net_error() != net::ERR_IO_PENDING) { |
| // If the entry obtained in the previous iteration matches the condition, |
| // mark it for deletion. The iterator is already one step forward, so it |
| // won't be invalidated. Always close the previous entry so it does not |
| // leak. |
| if (previous_entry_) { |
| if (condition_.Run(previous_entry_)) { |
| previous_entry_->Doom(); |
| } |
| previous_entry_->Close(); |
| } |
| |
| if (result.net_error() == net::ERR_FAILED) { |
| // The iteration finished successfully or we can no longer iterate |
| // (e.g. the cache was destroyed). We cannot distinguish between the two, |
| // but we know that there is nothing more that we can do. |
| base::ThreadTaskRunnerHandle::Get()->PostTask( |
| FROM_HERE, |
| base::BindOnce(&ConditionalCacheDeletionHelper::NotifyCompletion, |
| weak_factory_.GetWeakPtr())); |
| return; |
| } |
| |
| previous_entry_ = result.ReleaseEntry(); |
| result = iterator_->OpenNextEntry( |
| base::BindRepeating(&ConditionalCacheDeletionHelper::IterateOverEntries, |
| weak_factory_.GetWeakPtr())); |
| } |
| } |
| |
| void ConditionalCacheDeletionHelper::NotifyCompletion() { |
| std::move(completion_callback_).Run(); |
| } |
| |
| } // namespace network |