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// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ash/smb_client/fileapi/smbfs_async_file_util.h"
#include <utility>
#include "base/check_op.h"
#include "base/files/file.h"
#include "base/functional/bind.h"
#include "base/memory/raw_ptr.h"
#include "base/task/sequenced_task_runner.h"
#include "chrome/browser/ash/smb_client/smb_service.h"
#include "chrome/browser/ash/smb_client/smb_service_factory.h"
#include "chrome/browser/ash/smb_client/smbfs_share.h"
#include "content/public/browser/browser_task_traits.h"
#include "content/public/browser/browser_thread.h"
#include "storage/browser/file_system/file_system_url.h"
#include "storage/browser/file_system/local_file_util.h"
namespace ash::smb_client {
namespace {
void AllowCredentialsRequestOnUIThread(Profile* profile,
const base::FilePath& path) {
SmbService* service = SmbServiceFactory::Get(profile);
DCHECK(service);
SmbFsShare* share = service->GetSmbFsShareForPath(path);
// Because the request is posted from the IO thread, there's no guarantee the
// share still exists at this point.
if (share) {
// To avoid spamming the user with credentials dialogs, we only want to show
// the dialog when the user clicks on the share in the Files App. However,
// there's no way to know the request came from the Files App. Instead,
// intercept ReadDirectory(), which the Files App does whenever the user
// enters a directory and use that as a proxy for user-initiated navigation.
// This isn't perfect, since lots of other things are likely to ask for a
// directory listing. But it also prevents dialog activation by any
// operation done purely through the native FUSE filesystem.
share->AllowCredentialsRequest();
}
}
class DeleteRecursivelyOperation {
public:
DeleteRecursivelyOperation(
Profile* profile,
const base::FilePath& path,
storage::AsyncFileUtil::StatusCallback callback,
scoped_refptr<base::SequencedTaskRunner> origin_task_runner)
: profile_(profile),
path_(path),
callback_(std::move(callback)),
origin_task_runner_(std::move(origin_task_runner)) {
DCHECK(origin_task_runner_->RunsTasksInCurrentSequence());
}
DeleteRecursivelyOperation() = delete;
DeleteRecursivelyOperation(const DeleteRecursivelyOperation&) = delete;
DeleteRecursivelyOperation& operator=(const DeleteRecursivelyOperation&) =
delete;
void Start() {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
SmbService* service = SmbServiceFactory::Get(profile_);
DCHECK(service);
SmbFsShare* share = service->GetSmbFsShareForPath(path_);
// Because the request is posted from the IO thread, there's no guarantee
// the share still exists at this point.
if (!share) {
origin_task_runner_->PostTask(
FROM_HERE,
base::BindOnce(std::move(callback_), base::File::FILE_ERROR_FAILED));
delete this;
return;
}
share->DeleteRecursively(
path_, base::BindOnce(&DeleteRecursivelyOperation::OnDeleteRecursively,
base::Owned(this)));
}
void OnDeleteRecursively(base::File::Error error) {
DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
// Make StatusCallback on the thread where the operation originated.
origin_task_runner_->PostTask(FROM_HERE,
base::BindOnce(std::move(callback_), error));
}
const raw_ptr<Profile> profile_;
const base::FilePath path_;
storage::AsyncFileUtil::StatusCallback callback_;
scoped_refptr<base::SequencedTaskRunner> origin_task_runner_;
};
} // namespace
SmbFsAsyncFileUtil::SmbFsAsyncFileUtil(Profile* profile)
: AsyncFileUtilAdapter(std::make_unique<storage::LocalFileUtil>()),
profile_(profile) {
DCHECK(profile_);
}
SmbFsAsyncFileUtil::~SmbFsAsyncFileUtil() = default;
void SmbFsAsyncFileUtil::ReadDirectory(
std::unique_ptr<storage::FileSystemOperationContext> context,
const storage::FileSystemURL& url,
ReadDirectoryCallback callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
content::GetUIThreadTaskRunner({})->PostTaskAndReply(
FROM_HERE,
base::BindOnce(&AllowCredentialsRequestOnUIThread, profile_, url.path()),
base::BindOnce(&SmbFsAsyncFileUtil::RealReadDirectory,
weak_factory_.GetWeakPtr(), std::move(context), url,
std::move(callback)));
}
void SmbFsAsyncFileUtil::RealReadDirectory(
std::unique_ptr<storage::FileSystemOperationContext> context,
const storage::FileSystemURL& url,
ReadDirectoryCallback callback) {
storage::AsyncFileUtilAdapter::ReadDirectory(std::move(context), url,
std::move(callback));
}
void SmbFsAsyncFileUtil::DeleteRecursively(
std::unique_ptr<storage::FileSystemOperationContext> context,
const storage::FileSystemURL& url,
StatusCallback callback) {
DCHECK_CURRENTLY_ON(content::BrowserThread::IO);
content::GetUIThreadTaskRunner({})->PostTask(
FROM_HERE,
base::BindOnce(&DeleteRecursivelyOperation::Start,
base::Unretained(new DeleteRecursivelyOperation(
profile_, url.path(), std::move(callback),
base::SequencedTaskRunner::GetCurrentDefault()))));
}
} // namespace ash::smb_client
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