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// 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.
#include "base/memory/ptr_util.h"
#include "base/synchronization/waitable_event.h"
#include "chrome/browser/browsing_data/cache_test_util.h"
#include "net/disk_cache/disk_cache.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;
CacheTestUtil::CacheTestUtil(content::StoragePartition* partition)
: partition_(partition), remaining_tasks_(0) {
done_callback_ =
base::Bind(&CacheTestUtil::DoneCallback, base::Unretained(this));
// UI and IO thread synchronization.
waitable_event_ = base::MakeUnique<base::WaitableEvent>(
base::WaitableEvent::ResetPolicy::AUTOMATIC,
base::WaitableEvent::InitialState::NOT_SIGNALED);
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&CacheTestUtil::SetUpOnIOThread, base::Unretained(this)));
WaitForTasksOnIOThread();
}
CacheTestUtil::~CacheTestUtil() {
// The cache iterator must be deleted on the thread where it was created,
// which is the IO thread.
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&CacheTestUtil::TearDownOnIOThread, base::Unretained(this)));
WaitForTasksOnIOThread();
}
void CacheTestUtil::CreateCacheEntries(const std::set<std::string>& keys) {
BrowserThread::PostTask(
BrowserThread::IO, FROM_HERE,
base::Bind(&CacheTestUtil::CreateCacheEntriesOnIOThread,
base::Unretained(this), base::ConstRef(keys)));
WaitForTasksOnIOThread();
}
void CacheTestUtil::SetUpOnIOThread() {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
net::URLRequestContextGetter* context = partition_->GetURLRequestContext();
net::HttpCache* cache =
context->GetURLRequestContext()->http_transaction_factory()->GetCache();
SetNumberOfWaitedTasks(1);
WaitForCompletion(cache->GetBackend(&backend_, done_callback_));
}
void CacheTestUtil::TearDownOnIOThread() {
iterator_.reset();
for (disk_cache::Entry* entry : entries_) {
entry->Close();
}
entries_.clear();
DoneCallback(net::OK);
}
void CacheTestUtil::CreateCacheEntriesOnIOThread(
const std::set<std::string>& keys) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
int pos = entries_.size();
entries_.resize(entries_.size() + keys.size());
SetNumberOfWaitedTasks(keys.size());
for (const std::string& key : keys) {
WaitForCompletion(
backend_->CreateEntry(key, &entries_[pos++], done_callback_));
}
}
// Waiting for tasks to be done on IO thread. --------------------------------
void CacheTestUtil::WaitForTasksOnIOThread() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
waitable_event_->Wait();
}
void CacheTestUtil::SetNumberOfWaitedTasks(int count) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
remaining_tasks_ = count;
}
void CacheTestUtil::WaitForCompletion(int value) {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
if (value >= 0) {
// We got the result immediately.
DoneCallback(value);
} else if (value == net::ERR_IO_PENDING) {
// We need to wait for the callback.
} else {
// An error has occurred.
NOTREACHED();
}
}
void CacheTestUtil::DoneCallback(int value) {
DCHECK_GE(value, 0); // Negative values represent an error.
DCHECK_CURRENTLY_ON(BrowserThread::IO);
if (--remaining_tasks_ > 0)
return;
waitable_event_->Signal();
}
// Check cache content.
std::vector<std::string> CacheTestUtil::GetEntryKeys() {
DCHECK_CURRENTLY_ON(BrowserThread::UI);
BrowserThread::PostTask(BrowserThread::IO, FROM_HERE,
base::Bind(&CacheTestUtil::GetEntryKeysOnIOThread,
base::Unretained(this)));
WaitForTasksOnIOThread();
return keys_;
}
void CacheTestUtil::GetEntryKeysOnIOThread() {
DCHECK_CURRENTLY_ON(BrowserThread::IO);
keys_.clear();
current_entry_ = nullptr;
iterator_ = backend_->CreateIterator();
GetNextKey(net::OK);
}
void CacheTestUtil::GetNextKey(int error) {
while (error != net::ERR_IO_PENDING) {
if (error == net::ERR_FAILED) {
DoneCallback(net::OK);
return;
}
if (current_entry_) {
keys_.push_back(current_entry_->GetKey());
}
error = iterator_->OpenNextEntry(
¤t_entry_,
base::Bind(&CacheTestUtil::GetNextKey, base::Unretained(this)));
}
}
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