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// Copyright 2015 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 "components/browsing_data/content/storage_partition_http_cache_data_remover.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/threading/thread_task_runner_handle.h"
#include "components/browsing_data/content/conditional_cache_deletion_helper.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/browser/storage_partition.h"
#include "net/base/sdch_manager.h"
#include "net/disk_cache/blockfile/backend_impl.h"
#include "net/disk_cache/disk_cache.h"
#include "net/disk_cache/memory/mem_backend_impl.h"
#include "net/disk_cache/simple/simple_backend_impl.h"
#include "net/http/http_cache.h"
#include "net/url_request/url_request_context.h"
#include "net/url_request/url_request_context_getter.h"
using content::BrowserThread;
namespace browsing_data {
StoragePartitionHttpCacheDataRemover::StoragePartitionHttpCacheDataRemover(
base::Callback<bool(const GURL&)> url_predicate,
base::Time delete_begin,
base::Time delete_end,
net::URLRequestContextGetter* main_context_getter,
net::URLRequestContextGetter* media_context_getter)
: url_predicate_(url_predicate),
delete_begin_(delete_begin),
delete_end_(delete_end),
main_context_getter_(main_context_getter),
media_context_getter_(media_context_getter),
next_cache_state_(CacheState::NONE),
cache_(nullptr) {}
StoragePartitionHttpCacheDataRemover::~StoragePartitionHttpCacheDataRemover() {
}
// static.
StoragePartitionHttpCacheDataRemover*
StoragePartitionHttpCacheDataRemover::CreateForRange(
content::StoragePartition* storage_partition,
base::Time delete_begin,
base::Time delete_end) {
return new StoragePartitionHttpCacheDataRemover(
base::Callback<bool(const GURL&)>(), // Null callback.
delete_begin, delete_end,
storage_partition->GetURLRequestContext(),
storage_partition->GetMediaURLRequestContext());
}
// static.
StoragePartitionHttpCacheDataRemover*
StoragePartitionHttpCacheDataRemover::CreateForURLsAndRange(
content::StoragePartition* storage_partition,
const base::Callback<bool(const GURL&)>& url_predicate,
base::Time delete_begin,
base::Time delete_end) {
return new StoragePartitionHttpCacheDataRemover(
url_predicate, delete_begin, delete_end,
storage_partition->GetURLRequestContext(),
storage_partition->GetMediaURLRequestContext());
}
void StoragePartitionHttpCacheDataRemover::Remove(
const base::Closure& done_callback) {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
DCHECK(!done_callback.is_null());
done_callback_ = done_callback;
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(
&StoragePartitionHttpCacheDataRemover::ClearHttpCacheOnIOThread,
base::Unretained(this)));
}
void StoragePartitionHttpCacheDataRemover::ClearHttpCacheOnIOThread() {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
next_cache_state_ = CacheState::NONE;
DCHECK_EQ(CacheState::NONE, next_cache_state_);
DCHECK(main_context_getter_.get());
DCHECK(media_context_getter_.get());
next_cache_state_ = CacheState::CREATE_MAIN;
DoClearCache(net::OK);
}
void StoragePartitionHttpCacheDataRemover::ClearedHttpCache() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
done_callback_.Run();
base::ThreadTaskRunnerHandle::Get()->DeleteSoon(FROM_HERE, this);
}
// The expected state sequence is CacheState::NONE --> CacheState::CREATE_MAIN
// --> CacheState::PROCESS_MAIN --> CacheState::CREATE_MEDIA -->
// CacheState::PROCESS_MEDIA --> CacheState::DONE, and any errors are ignored.
void StoragePartitionHttpCacheDataRemover::DoClearCache(int rv) {
DCHECK_NE(CacheState::NONE, next_cache_state_);
while (rv != net::ERR_IO_PENDING && next_cache_state_ != CacheState::NONE) {
switch (next_cache_state_) {
case CacheState::CREATE_MAIN:
case CacheState::CREATE_MEDIA: {
// Get a pointer to the cache.
net::URLRequestContextGetter* getter =
(next_cache_state_ == CacheState::CREATE_MAIN)
? main_context_getter_.get()
: media_context_getter_.get();
net::HttpCache* http_cache = getter->GetURLRequestContext()
->http_transaction_factory()
->GetCache();
next_cache_state_ = (next_cache_state_ == CacheState::CREATE_MAIN)
? CacheState::DELETE_MAIN
: CacheState::DELETE_MEDIA;
// Clear QUIC server information from memory and the disk cache.
http_cache->GetSession()
->quic_stream_factory()
->ClearCachedStatesInCryptoConfig(url_predicate_);
// Clear SDCH dictionary state.
net::SdchManager* sdch_manager =
getter->GetURLRequestContext()->sdch_manager();
// The test is probably overkill, since chrome should always have an
// SdchManager. But in general the URLRequestContext is *not*
// guaranteed to have an SdchManager, so checking is wise.
if (sdch_manager)
sdch_manager->ClearData();
rv = http_cache->GetBackend(
&cache_,
base::Bind(&StoragePartitionHttpCacheDataRemover::DoClearCache,
base::Unretained(this)));
break;
}
case CacheState::DELETE_MAIN:
case CacheState::DELETE_MEDIA: {
next_cache_state_ = (next_cache_state_ == CacheState::DELETE_MAIN)
? CacheState::CREATE_MEDIA
: CacheState::DONE;
// |cache_| can be null if it cannot be initialized.
if (cache_) {
if (!url_predicate_.is_null()) {
rv = (new ConditionalCacheDeletionHelper(
cache_,
ConditionalCacheDeletionHelper::CreateURLAndTimeCondition(
url_predicate_,
delete_begin_,
delete_end_)))->DeleteAndDestroySelfWhenFinished(
base::Bind(
&StoragePartitionHttpCacheDataRemover::DoClearCache,
base::Unretained(this)));
} else if (delete_begin_.is_null() && delete_end_.is_max()) {
rv = cache_->DoomAllEntries(base::Bind(
&StoragePartitionHttpCacheDataRemover::DoClearCache,
base::Unretained(this)));
} else {
rv = cache_->DoomEntriesBetween(
delete_begin_, delete_end_,
base::Bind(
&StoragePartitionHttpCacheDataRemover::DoClearCache,
base::Unretained(this)));
}
cache_ = NULL;
}
break;
}
case CacheState::DONE: {
cache_ = NULL;
next_cache_state_ = CacheState::NONE;
// Notify the UI thread that we are done.
BrowserThread::PostTask(
BrowserThread::UI, FROM_HERE,
base::Bind(&StoragePartitionHttpCacheDataRemover::ClearedHttpCache,
base::Unretained(this)));
return;
}
case CacheState::NONE: {
NOTREACHED() << "bad state";
return;
}
}
}
}
} // namespace browsing_data
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