1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
5 #ifndef STORAGE_BROWSER_BLOB_LOCAL_FILE_STREAM_READER_H_
6 #define STORAGE_BROWSER_BLOB_LOCAL_FILE_STREAM_READER_H_
8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h"
10 #include "base/files/file.h"
11 #include "base/files/file_path.h"
12 #include "base/memory/weak_ptr.h"
13 #include "base/time/time.h"
14 #include "storage/browser/blob/file_stream_reader.h"
15 #include "storage/browser/storage_browser_export.h"
22 class LocalFileStreamReaderTest;
31 // A thin wrapper of net::FileStream with range support for sliced file
33 class STORAGE_EXPORT LocalFileStreamReader
34 : public NON_EXPORTED_BASE(FileStreamReader) {
36 ~LocalFileStreamReader() override;
38 // FileStreamReader overrides.
39 int Read(net::IOBuffer* buf,
41 const net::CompletionCallback& callback) override;
42 int64 GetLength(const net::Int64CompletionCallback& callback) override;
45 friend class FileStreamReader;
46 friend class content::LocalFileStreamReaderTest;
48 LocalFileStreamReader(base::TaskRunner* task_runner,
49 const base::FilePath& file_path,
51 const base::Time& expected_modification_time);
52 int Open(const net::CompletionCallback& callback);
54 // Callbacks that are chained from Open for Read.
55 void DidVerifyForOpen(const net::CompletionCallback& callback,
56 int64 get_length_result);
57 void DidOpenFileStream(const net::CompletionCallback& callback,
59 void DidSeekFileStream(const net::CompletionCallback& callback,
61 void DidOpenForRead(net::IOBuffer* buf,
63 const net::CompletionCallback& callback,
66 void DidGetFileInfoForGetLength(const net::Int64CompletionCallback& callback,
67 base::File::Error error,
68 const base::File::Info& file_info);
70 scoped_refptr<base::TaskRunner> task_runner_;
71 scoped_ptr<net::FileStream> stream_impl_;
72 const base::FilePath file_path_;
73 const int64 initial_offset_;
74 const base::Time expected_modification_time_;
75 bool has_pending_open_;
76 base::WeakPtrFactory<LocalFileStreamReader> weak_factory_;
79 } // namespace storage
81 #endif // STORAGE_BROWSER_BLOB_LOCAL_FILE_STREAM_READER_H_