content/browser/fileapi/upload_file_system_file_element_reader.h

   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
  14 namespace storage {
  15 class FileStreamReader;
  16 }
  17
  18 namespace storage {
  19 class FileSystemContext;
  20 }
  21
  22 namespace content {
  23
  24 // An UploadElementReader implementation for filesystem file.
  25 class 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   ~UploadFileSystemFileElementReader() override;
  35
  36   // UploadElementReader overrides:
  37   int Init(const net::CompletionCallback& callback) override;
  38   uint64 GetContentLength() const override;
  39   uint64 BytesRemaining() const override;
  40   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_