1// Copyright 2014 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.
4
5#ifndef CONTENT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
6#define CONTENT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
7
8#include "base/memory/weak_ptr.h"
9#include "base/time/time.h"
10#include "content/common/content_export.h"
11#include "net/base/upload_element_reader.h"
12#include "url/gurl.h"
13
14namespace storage {
15class FileStreamReader;
16}
17
18namespace storage {
19class FileSystemContext;
20}
21
22namespace content {
23
24// An UploadElementReader implementation for filesystem file.
25class CONTENT_EXPORT UploadFileSystemFileElementReader :
26    NON_EXPORTED_BASE(public net::UploadElementReader) {
27 public:
28  UploadFileSystemFileElementReader(
29      storage::FileSystemContext* file_system_context,
30      const GURL& url,
31      uint64 range_offset,
32      uint64 range_length,
33      const base::Time& expected_modification_time);
34  virtual ~UploadFileSystemFileElementReader();
35
36  // UploadElementReader overrides:
37  virtual int Init(const net::CompletionCallback& callback) OVERRIDE;
38  virtual uint64 GetContentLength() const OVERRIDE;
39  virtual uint64 BytesRemaining() const OVERRIDE;
40  virtual int Read(net::IOBuffer* buf,
41                   int buf_length,
42                   const net::CompletionCallback& callback) OVERRIDE;
43
44 private:
45  void OnGetLength(const net::CompletionCallback& callback, int64 result);
46  void OnRead(const net::CompletionCallback& callback, int result);
47
48  scoped_refptr<storage::FileSystemContext> file_system_context_;
49  const GURL url_;
50  const uint64 range_offset_;
51  const uint64 range_length_;
52  const base::Time expected_modification_time_;
53
54  scoped_ptr<storage::FileStreamReader> stream_reader_;
55
56  uint64 stream_length_;
57  uint64 position_;
58
59  base::WeakPtrFactory<UploadFileSystemFileElementReader> weak_ptr_factory_;
60
61  DISALLOW_COPY_AND_ASSIGN(UploadFileSystemFileElementReader);
62};
63
64}  // namespace content
65
66#endif  // CONTENT_BROWSER_FILEAPI_UPLOAD_FILE_SYSTEM_FILE_ELEMENT_READER_H_
67