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| 1 // Copyright (c) 2009 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 // This file defines an interface for reading a file asynchronously on a | |
| 6 // background thread. | |
| 7 | |
| 8 #ifndef CHROME_BROWSER_NET_FILE_READER_H_ | |
| 9 #define CHROME_BROWSER_NET_FILE_READER_H_ | |
| 10 | |
| 11 #include <string> | |
| 12 | |
| 13 #include "base/file_path.h" | |
| 14 #include "base/ref_counted.h" | |
| 15 #include "base/task.h" | |
| 16 | |
| 17 class MessageLoop; | |
| 18 | |
| 19 class FileReader : public base::RefCountedThreadSafe<FileReader> { | |
| 20 public: | |
| 21 // Reports success or failure and the data of the file upon success. | |
| 22 typedef Callback2<bool, const std::string&>::Type Callback; | |
| 23 | |
| 24 FileReader(const FilePath& path, Callback* callback); | |
| 25 | |
| 26 // Called to start reading the file on a background thread. Upon completion, | |
| 27 // the callback will be notified of the results. | |
| 28 void Start(); | |
| 29 | |
| 30 private: | |
| 31 void ReadFileOnBackgroundThread(); | |
| 32 void RunCallback(bool success, const std::string& data); | |
| 33 | |
| 34 FilePath path_; | |
| 35 Callback* callback_; | |
| 36 MessageLoop* origin_loop_; | |
| 37 }; | |
| 38 | |
| 39 #endif // CHROME_BROWSER_NET_FILE_READER_H_ | |
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