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- // Copyright (c) 2012 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.
- #ifndef STORAGE_BROWSER_FILE_SYSTEM_SANDBOX_FILE_STREAM_READER_H_
- #define STORAGE_BROWSER_FILE_SYSTEM_SANDBOX_FILE_STREAM_READER_H_
- #include <stdint.h>
- #include <memory>
- #include "base/bind.h"
- #include "base/component_export.h"
- #include "base/files/file.h"
- #include "base/memory/raw_ptr.h"
- #include "base/memory/ref_counted.h"
- #include "base/time/time.h"
- #include "net/base/completion_once_callback.h"
- #include "storage/browser/blob/shareable_file_reference.h"
- #include "storage/browser/file_system/file_stream_reader.h"
- #include "storage/browser/file_system/file_system_url.h"
- namespace base {
- class FilePath;
- }
- namespace storage {
- class FileSystemContext;
- // FileStreamReader implementation for Sandboxed FileSystem files.
- // This wraps either a LocalFileStreamReader or a MemoryFileStreamReader,
- // depending on if we're in an incognito profile or not.
- class COMPONENT_EXPORT(STORAGE_BROWSER) SandboxFileStreamReader
- : public FileStreamReader {
- public:
- // Creates a new reader for a filesystem URL |url| from |initial_offset|.
- // |expected_modification_time| specifies the expected last modification. if
- // the value is non-null, the reader will check the underlying file's actual
- // modification time to see if the file has been modified, and if it does any
- // succeeding read operations should fail with ERR_UPLOAD_FILE_CHANGED error.
- SandboxFileStreamReader(FileSystemContext* file_system_context,
- const FileSystemURL& url,
- int64_t initial_offset,
- const base::Time& expected_modification_time);
- SandboxFileStreamReader(const SandboxFileStreamReader&) = delete;
- SandboxFileStreamReader& operator=(const SandboxFileStreamReader&) = delete;
- ~SandboxFileStreamReader() override;
- // FileStreamReader overrides.
- int Read(net::IOBuffer* buf,
- int buf_len,
- net::CompletionOnceCallback callback) override;
- int64_t GetLength(net::Int64CompletionOnceCallback callback) override;
- private:
- friend class FileStreamReader;
- int CreateSnapshot();
- void DidCreateSnapshot(base::File::Error file_error,
- const base::File::Info& file_info,
- const base::FilePath& platform_path,
- scoped_refptr<ShareableFileReference> file_ref);
- void OnRead(int rv);
- void OnGetLength(int64_t rv);
- raw_ptr<net::IOBuffer, DanglingUntriaged> read_buf_;
- int read_buf_len_;
- net::CompletionOnceCallback read_callback_;
- net::Int64CompletionOnceCallback get_length_callback_;
- scoped_refptr<FileSystemContext> file_system_context_;
- FileSystemURL url_;
- const int64_t initial_offset_;
- const base::Time expected_modification_time_;
- std::unique_ptr<FileStreamReader> file_reader_;
- scoped_refptr<ShareableFileReference> snapshot_ref_;
- bool has_pending_create_snapshot_;
- base::WeakPtrFactory<SandboxFileStreamReader> weak_factory_{this};
- };
- } // namespace storage
- #endif // STORAGE_BROWSER_FILE_SYSTEM_SANDBOX_FILE_STREAM_READER_H_
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