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1 // Copyright 2013 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 COMPONENTS_SAFE_JSON_PARSER_SAFE_JSON_PARSER_H_ | |
6 #define COMPONENTS_SAFE_JSON_PARSER_SAFE_JSON_PARSER_H_ | |
7 | |
8 #include <string> | |
9 | |
10 #include "base/basictypes.h" | |
11 #include "base/callback.h" | |
12 #include "base/memory/scoped_ptr.h" | |
13 #include "content/public/browser/utility_process_host_client.h" | |
14 | |
15 namespace base { | |
16 class ListValue; | |
17 class Value; | |
18 } | |
19 | |
20 namespace IPC { | |
21 class Message; | |
22 } | |
23 | |
24 namespace safe_json_parser { | |
25 | |
26 // SafeJsonParser parses a given JSON safely via a utility process. The object | |
27 // is ref-counted and kept alive after Start() is called until one of the two | |
28 // callbacks is called. | |
29 class SafeJsonParser : public content::UtilityProcessHostClient { | |
30 public: | |
31 typedef base::Callback<void(scoped_ptr<base::Value>)> SuccessCallback; | |
32 typedef base::Callback<void(const std::string&)> ErrorCallback; | |
33 | |
34 SafeJsonParser(const std::string& unsafe_json, | |
35 const SuccessCallback& success_callback, | |
36 const ErrorCallback& error_callback); | |
37 | |
38 void Start(); | |
39 | |
40 private: | |
41 ~SafeJsonParser() override; | |
42 | |
43 void StartWorkOnIOThread(); | |
44 | |
45 void OnJSONParseSucceeded(const base::ListValue& wrapper); | |
46 void OnJSONParseFailed(const std::string& error_message); | |
47 | |
48 void ReportResults(); | |
49 void ReportResultOnUIThread(); | |
50 | |
51 // Implementing pieces of the UtilityProcessHostClient interface. | |
52 bool OnMessageReceived(const IPC::Message& message) override; | |
53 | |
54 const std::string unsafe_json_; | |
55 SuccessCallback success_callback_; | |
56 ErrorCallback error_callback_; | |
57 | |
58 scoped_ptr<base::Value> parsed_json_; | |
59 std::string error_; | |
60 | |
61 DISALLOW_COPY_AND_ASSIGN(SafeJsonParser); | |
62 }; | |
63 | |
64 } // namespace safe_json_parser | |
65 | |
66 #endif // COMPONENTS_SAFE_JSON_PARSER_SAFE_JSON_PARSER_H_ | |
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