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. 4 5 #ifndef WEBKIT_BROWSER_BLOB_LOCAL_FILE_STREAM_READER_H_ 6 #define WEBKIT_BROWSER_BLOB_LOCAL_FILE_STREAM_READER_H_ 7 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 "webkit/browser/blob/file_stream_reader.h" 15 #include "webkit/browser/webkit_storage_browser_export.h" 16 17 namespace base { 18 class TaskRunner; 19 } 20 21 namespace content { 22 class LocalFileStreamReaderTest; 23 } 24 25 namespace net { 26 class FileStream; 27 } 28 29 namespace webkit_blob { 30 31 // A thin wrapper of net::FileStream with range support for sliced file 32 // handling. 33 class WEBKIT_STORAGE_BROWSER_EXPORT LocalFileStreamReader NON_EXPORTED_BASE(FileStreamReader)34 : public NON_EXPORTED_BASE(FileStreamReader) { 35 public: 36 virtual ~LocalFileStreamReader(); 37 38 // FileStreamReader overrides. 39 virtual int Read(net::IOBuffer* buf, int buf_len, 40 const net::CompletionCallback& callback) OVERRIDE; 41 virtual int64 GetLength( 42 const net::Int64CompletionCallback& callback) OVERRIDE; 43 44 private: 45 friend class FileStreamReader; 46 friend class content::LocalFileStreamReaderTest; 47 48 LocalFileStreamReader(base::TaskRunner* task_runner, 49 const base::FilePath& file_path, 50 int64 initial_offset, 51 const base::Time& expected_modification_time); 52 int Open(const net::CompletionCallback& callback); 53 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, 58 int result); 59 void DidSeekFileStream(const net::CompletionCallback& callback, 60 int64 seek_result); 61 void DidOpenForRead(net::IOBuffer* buf, 62 int buf_len, 63 const net::CompletionCallback& callback, 64 int open_result); 65 66 void DidGetFileInfoForGetLength(const net::Int64CompletionCallback& callback, 67 base::File::Error error, 68 const base::File::Info& file_info); 69 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_; 77 }; 78 79 } // namespace webkit_blob 80 81 #endif // WEBKIT_BROWSER_BLOB_LOCAL_FILE_STREAM_READER_H_ 82