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 CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_ 6 #define CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_ 7 8 #include "base/bind.h" 9 #include "base/files/file.h" 10 #include "base/memory/ref_counted.h" 11 #include "base/memory/weak_ptr.h" 12 #include "webkit/browser/blob/file_stream_reader.h" 13 #include "webkit/browser/fileapi/file_system_url.h" 14 #include "webkit/browser/webkit_storage_browser_export.h" 15 16 namespace base { 17 class FilePath; 18 } 19 20 namespace fileapi { 21 class FileSystemContext; 22 } 23 24 class MTPFileStreamReader 25 : public NON_EXPORTED_BASE(webkit_blob::FileStreamReader) { 26 public: 27 MTPFileStreamReader(fileapi::FileSystemContext* file_system_context, 28 const fileapi::FileSystemURL& url, 29 int64 initial_offset, 30 const base::Time& expected_modification_time, 31 bool do_media_header_validation); 32 33 virtual ~MTPFileStreamReader(); 34 35 // FileStreamReader overrides. 36 virtual int Read(net::IOBuffer* buf, int buf_len, 37 const net::CompletionCallback& callback) OVERRIDE; 38 virtual int64 GetLength( 39 const net::Int64CompletionCallback& callback) OVERRIDE; 40 41 private: 42 void FinishValidateMediaHeader( 43 net::IOBuffer* header_buf, 44 net::IOBuffer* buf, int buf_len, 45 const net::CompletionCallback& callback, 46 const base::File::Info& file_info, 47 int header_bytes_read); 48 49 void FinishRead(const net::CompletionCallback& callback, 50 const base::File::Info& file_info, int bytes_read); 51 52 void FinishGetLength(const net::Int64CompletionCallback& callback, 53 const base::File::Info& file_info); 54 55 scoped_refptr<fileapi::FileSystemContext> file_system_context_; 56 fileapi::FileSystemURL url_; 57 int64 current_offset_; 58 const base::Time expected_modification_time_; 59 60 bool media_header_validated_; 61 62 base::WeakPtrFactory<MTPFileStreamReader> weak_factory_; 63 64 DISALLOW_COPY_AND_ASSIGN(MTPFileStreamReader); 65 }; 66 67 #endif // CHROME_BROWSER_MEDIA_GALLERIES_FILEAPI_MTP_FILE_STREAM_READER_H_ 68