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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CONTENT_BROWSER_FILE_SYSTEM_ACCESS_FILE_SYSTEM_ACCESS_HANDLE_BASE_H_
#define CONTENT_BROWSER_FILE_SYSTEM_ACCESS_FILE_SYSTEM_ACCESS_HANDLE_BASE_H_
#include "base/memory/raw_ptr.h"
#include "base/memory/weak_ptr.h"
#include "base/sequence_checker.h"
#include "base/thread_annotations.h"
#include "content/browser/file_system_access/file_system_access_lock_manager.h"
#include "content/browser/file_system_access/file_system_access_manager_impl.h"
#include "content/browser/file_system_access/file_system_access_transfer_token_impl.h"
#include "content/common/content_export.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/file_system_access_permission_context.h"
#include "storage/browser/file_system/file_system_url.h"
#include "third_party/blink/public/mojom/file_system_access/file_system_access_cloud_identifier.mojom.h"
#include "third_party/blink/public/mojom/file_system_access/file_system_access_error.mojom.h"
#include "third_party/blink/public/mojom/permissions/permission_status.mojom.h"
namespace storage {
class FileSystemContext;
} // namespace storage
namespace content {
class WebContents;
class FileSystemAccessSafeMoveHelper;
// Base class for File and Directory handle implementations. Holds data that is
// common to both and (will) deal with functionality that is common as well,
// such as permission requests. Instances of this class should be owned by the
// FileSystemAccessManagerImpl instance passed in to the constructor.
//
// This class is not thread safe, all methods must be called from the same
// sequence. That sequence also has to be the same sequence on which the
// FileSystemAccessPermissionContext expects to be interacted with, which
// is the UI thread.
class CONTENT_EXPORT FileSystemAccessHandleBase {
public:
using BindingContext = FileSystemAccessManagerImpl::BindingContext;
using SharedHandleState = FileSystemAccessManagerImpl::SharedHandleState;
using PermissionStatus = blink::mojom::PermissionStatus;
FileSystemAccessHandleBase(FileSystemAccessManagerImpl* manager,
const BindingContext& context,
const storage::FileSystemURL& url,
const SharedHandleState& handle_state);
FileSystemAccessHandleBase(const FileSystemAccessHandleBase&) = delete;
FileSystemAccessHandleBase& operator=(const FileSystemAccessHandleBase&) =
delete;
~FileSystemAccessHandleBase();
const storage::FileSystemURL& url() const { return url_; }
const SharedHandleState& handle_state() const { return handle_state_; }
const BindingContext& context() const { return context_; }
FileSystemAccessManagerImpl* manager() { return manager_; }
storage::FileSystemContext* file_system_context() {
return manager()->context();
}
PermissionStatus GetReadPermissionStatus();
PermissionStatus GetWritePermissionStatus();
storage::FileSystemURL GetParentURLForTesting() { return GetParentURL(); }
// Implementation for the GetPermissionStatus method in the
// blink::mojom::FileSystemAccessFileHandle and DirectoryHandle interfaces.
void DoGetPermissionStatus(
bool writable,
base::OnceCallback<void(PermissionStatus)> callback);
// Implementation for the RequestPermission method in the
// blink::mojom::FileSystemAccessFileHandle and DirectoryHandle interfaces.
void DoRequestPermission(
bool writable,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr,
PermissionStatus)> callback);
// TODO(crbug.com/40198034): Implement move and rename for directory handles.
// Implementation for the Move method in the
// blink::mojom::FileSystemAccessFileHandle and DirectoryHandle interfaces.
void DoMove(mojo::PendingRemote<blink::mojom::FileSystemAccessTransferToken>
destination_directory,
const std::string& new_entry_name,
bool has_transient_user_activation,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)>
callback);
// Implementation for the Rename method in the
// blink::mojom::FileSystemAccessFileHandle and DirectoryHandle interfaces.
void DoRename(const std::string& new_entry_name,
bool has_transient_user_activation,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)>
callback);
// Implementation for the Remove and RemoveEntry methods in the
// blink::mojom::FileSystemAccessFileHandle and DirectoryHandle interfaces.
void DoRemove(const storage::FileSystemURL& url,
bool recurse,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)>
callback);
void DidTakeRemoveLock(
const storage::FileSystemURL& url,
bool recurse,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)> callback,
scoped_refptr<FileSystemAccessLockManager::LockHandle> lock);
// Implementation for the GetCloudIdentifiers method in the
// blink::mojom::FileSystemAccessFileHandle and DirectoryHandle interfaces.
void DoGetCloudIdentifiers(
FileSystemAccessPermissionContext::HandleType handle_type,
ContentBrowserClient::GetCloudIdentifiersCallback callback);
// Invokes `callback`, possibly after first requesting write permission. If
// permission isn't granted, `no_permission_callback` is invoked instead. The
// callbacks can be invoked synchronously.
template <typename CallbackArgType>
void RunWithWritePermission(
base::OnceCallback<void(CallbackArgType)> callback,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr,
CallbackArgType)> no_permission_callback,
CallbackArgType callback_arg);
protected:
virtual base::WeakPtr<FileSystemAccessHandleBase> AsWeakPtr() = 0;
SEQUENCE_CHECKER(sequence_checker_);
private:
storage::FileSystemURL GetParentURL();
void DidRequestPermission(
bool writable,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr,
PermissionStatus)> callback,
FileSystemAccessPermissionGrant::PermissionRequestOutcome outcome);
void DidResolveTokenToMove(
const std::string& new_entry_name,
bool has_transient_user_activation,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)> callback,
FileSystemAccessTransferTokenImpl* resolved_token);
void PrepareForMove(
storage::FileSystemURL destination_url,
bool has_write_access_to_destination,
bool has_transient_user_activation,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)>
callback);
void DidTakeMoveLocks(
storage::FileSystemURL destination_url,
bool has_transient_user_activation,
bool has_write_access_to_destination,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)> callback,
std::vector<scoped_refptr<FileSystemAccessLockManager::LockHandle>>
locks);
// Only called if the move operation is not allowed to overwrite the target.
void ConfirmMoveWillNotOverwriteDestination(
const storage::FileSystemURL& destination_url,
std::vector<scoped_refptr<FileSystemAccessLockManager::LockHandle>> locks,
bool has_transient_user_activation,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)> callback,
base::File::Error result);
void DoPerformMoveOperation(
const storage::FileSystemURL& destination_url,
std::vector<scoped_refptr<FileSystemAccessLockManager::LockHandle>> locks,
bool has_transient_user_activation,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)>
callback);
void DidMove(
storage::FileSystemURL destination_url,
std::vector<scoped_refptr<FileSystemAccessLockManager::LockHandle>> locks,
std::unique_ptr<FileSystemAccessSafeMoveHelper> move_helper,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr)> callback,
blink::mojom::FileSystemAccessErrorPtr result);
bool ShouldTrackUsage(const storage::FileSystemURL& url) const {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
return url.type() != storage::kFileSystemTypeTemporary &&
url.type() != storage::kFileSystemTypeTest;
}
// The FileSystemAccessManagerImpl that owns this instance.
const raw_ptr<FileSystemAccessManagerImpl, DanglingUntriaged> manager_ =
nullptr;
base::WeakPtr<WebContents> web_contents_
GUARDED_BY_CONTEXT(sequence_checker_);
const BindingContext context_;
storage::FileSystemURL url_ GUARDED_BY_CONTEXT(sequence_checker_);
const SharedHandleState handle_state_;
};
template <typename CallbackArgType>
void FileSystemAccessHandleBase::RunWithWritePermission(
base::OnceCallback<void(CallbackArgType)> callback,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr,
CallbackArgType)> no_permission_callback,
CallbackArgType callback_arg) {
DCHECK_CALLED_ON_VALID_SEQUENCE(sequence_checker_);
DoRequestPermission(
/*writable=*/true,
base::BindOnce(
[](base::OnceCallback<void(CallbackArgType)> callback,
base::OnceCallback<void(blink::mojom::FileSystemAccessErrorPtr,
CallbackArgType)> no_permission_callback,
CallbackArgType callback_arg,
blink::mojom::FileSystemAccessErrorPtr result,
blink::mojom::PermissionStatus status) {
if (status == blink::mojom::PermissionStatus::GRANTED) {
std::move(callback).Run(std::move(callback_arg));
return;
}
if (result->status == blink::mojom::FileSystemAccessStatus::kOk) {
result->status =
blink::mojom::FileSystemAccessStatus::kPermissionDenied;
}
std::move(no_permission_callback)
.Run(std::move(result), std::move(callback_arg));
},
std::move(callback), std::move(no_permission_callback),
std::move(callback_arg)));
}
} // namespace content
#endif // CONTENT_BROWSER_FILE_SYSTEM_ACCESS_FILE_SYSTEM_ACCESS_HANDLE_BASE_H_
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