| // 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_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_ |
| #define STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_ |
| |
| #include <stdint.h> |
| |
| #include <memory> |
| |
| #include "base/bind.h" |
| #include "base/files/file.h" |
| #include "base/macros.h" |
| #include "base/memory/ref_counted.h" |
| #include "base/time/time.h" |
| #include "storage/browser/blob/shareable_file_reference.h" |
| #include "storage/browser/fileapi/file_stream_reader.h" |
| #include "storage/browser/fileapi/file_system_url.h" |
| #include "storage/browser/storage_browser_export.h" |
| |
| namespace base { |
| class FilePath; |
| class SequencedTaskRunner; |
| } |
| |
| namespace content { |
| class FileSystemFileStreamReaderTest; |
| } |
| |
| namespace storage { |
| |
| class FileSystemContext; |
| |
| // Generic FileStreamReader implementation for FileSystem files. |
| // Note: This generic implementation would work for any filesystems but |
| // remote filesystem should implement its own reader rather than relying |
| // on FileSystemOperation::GetSnapshotFile() which may force downloading |
| // the entire contents for remote files. |
| class STORAGE_EXPORT FileSystemFileStreamReader |
| : public NON_EXPORTED_BASE(storage::FileStreamReader) { |
| public: |
| ~FileSystemFileStreamReader() override; |
| |
| // FileStreamReader overrides. |
| int Read(net::IOBuffer* buf, |
| int buf_len, |
| const net::CompletionCallback& callback) override; |
| int64_t GetLength(const net::Int64CompletionCallback& callback) override; |
| |
| private: |
| friend class storage::FileStreamReader; |
| friend class content::FileSystemFileStreamReaderTest; |
| |
| FileSystemFileStreamReader(FileSystemContext* file_system_context, |
| const FileSystemURL& url, |
| int64_t initial_offset, |
| const base::Time& expected_modification_time); |
| |
| int CreateSnapshot(const base::Closure& callback, |
| const net::CompletionCallback& error_callback); |
| void DidCreateSnapshot( |
| const base::Closure& callback, |
| const net::CompletionCallback& error_callback, |
| base::File::Error file_error, |
| const base::File::Info& file_info, |
| const base::FilePath& platform_path, |
| const scoped_refptr<storage::ShareableFileReference>& file_ref); |
| |
| scoped_refptr<FileSystemContext> file_system_context_; |
| FileSystemURL url_; |
| const int64_t initial_offset_; |
| const base::Time expected_modification_time_; |
| std::unique_ptr<storage::FileStreamReader> local_file_reader_; |
| scoped_refptr<storage::ShareableFileReference> snapshot_ref_; |
| bool has_pending_create_snapshot_; |
| base::WeakPtrFactory<FileSystemFileStreamReader> weak_factory_; |
| |
| DISALLOW_COPY_AND_ASSIGN(FileSystemFileStreamReader); |
| }; |
| |
| } // namespace storage |
| |
| #endif // STORAGE_BROWSER_FILEAPI_FILE_SYSTEM_FILE_STREAM_READER_H_ |