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1 // Copyright (c) 2009 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 // | |
5 // This file defines an interface for reading a file asynchronously on a | |
6 // background thread. | |
7 | 4 |
8 #ifndef CHROME_BROWSER_NET_FILE_READER_H_ | 5 #ifndef CHROME_BROWSER_EXTENSIONS_FILE_READER_H_ |
9 #define CHROME_BROWSER_NET_FILE_READER_H_ | 6 #define CHROME_BROWSER_EXTENSIONS_FILE_READER_H_ |
10 | 7 |
11 #include <string> | 8 #include <string> |
12 | 9 |
13 #include "base/file_path.h" | |
14 #include "base/ref_counted.h" | 10 #include "base/ref_counted.h" |
15 #include "base/task.h" | 11 #include "base/task.h" |
| 12 #include "chrome/common/extensions/extension_resource.h" |
16 | 13 |
17 class MessageLoop; | 14 class MessageLoop; |
18 | 15 |
| 16 // This file defines an interface for reading a file asynchronously on a |
| 17 // background thread. |
| 18 // Consider abstracting out a FilePathProvider (ExtensionResource) and moving |
| 19 // back to chrome/browser/net if other subsystems want to use it. |
19 class FileReader : public base::RefCountedThreadSafe<FileReader> { | 20 class FileReader : public base::RefCountedThreadSafe<FileReader> { |
20 public: | 21 public: |
21 // Reports success or failure and the data of the file upon success. | 22 // Reports success or failure and the data of the file upon success. |
22 typedef Callback2<bool, const std::string&>::Type Callback; | 23 typedef Callback2<bool, const std::string&>::Type Callback; |
23 | 24 |
24 FileReader(const FilePath& path, Callback* callback); | 25 FileReader(const ExtensionResource& resource, Callback* callback); |
25 | 26 |
26 // Called to start reading the file on a background thread. Upon completion, | 27 // Called to start reading the file on a background thread. Upon completion, |
27 // the callback will be notified of the results. | 28 // the callback will be notified of the results. |
28 void Start(); | 29 void Start(); |
29 | 30 |
30 private: | 31 private: |
31 void ReadFileOnBackgroundThread(); | 32 void ReadFileOnBackgroundThread(); |
32 void RunCallback(bool success, const std::string& data); | 33 void RunCallback(bool success, const std::string& data); |
33 | 34 |
34 FilePath path_; | 35 ExtensionResource resource_; |
35 Callback* callback_; | 36 Callback* callback_; |
36 MessageLoop* origin_loop_; | 37 MessageLoop* origin_loop_; |
37 }; | 38 }; |
38 | 39 |
39 #endif // CHROME_BROWSER_NET_FILE_READER_H_ | 40 #endif // CHROME_BROWSER_EXTENSIONS_FILE_READER_H_ |
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