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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 CHROME_BROWSER_SAFE_JSON_PARSER_H_ |
| 6 #define CHROME_BROWSER_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 // SafeJsonParser parses a given JSON safely via a utility process. The object |
| 25 // is ref-counted and kept alive after Start() is called until one of the two |
| 26 // callbacks is called. |
| 27 class SafeJsonParser : public content::UtilityProcessHostClient { |
| 28 public: |
| 29 typedef base::Callback<void(scoped_ptr<base::Value>)> SuccessCallback; |
| 30 typedef base::Callback<void(const std::string&)> ErrorCallback; |
| 31 |
| 32 SafeJsonParser(const std::string& unsafe_json, |
| 33 const SuccessCallback& success_callback, |
| 34 const ErrorCallback& error_callback); |
| 35 |
| 36 void Start(); |
| 37 |
| 38 private: |
| 39 virtual ~SafeJsonParser(); |
| 40 |
| 41 void StartWorkOnIOThread(); |
| 42 |
| 43 void OnJSONParseSucceeded(const base::ListValue& wrapper); |
| 44 void OnJSONParseFailed(const std::string& error_message); |
| 45 |
| 46 void ReportResults(); |
| 47 void ReportResultOnUIThread(); |
| 48 |
| 49 // Implementing pieces of the UtilityProcessHostClient interface. |
| 50 virtual bool OnMessageReceived(const IPC::Message& message) OVERRIDE; |
| 51 |
| 52 const std::string unsafe_json_; |
| 53 SuccessCallback success_callback_; |
| 54 ErrorCallback error_callback_; |
| 55 |
| 56 scoped_ptr<base::Value> parsed_json_; |
| 57 std::string error_; |
| 58 |
| 59 DISALLOW_COPY_AND_ASSIGN(SafeJsonParser); |
| 60 }; |
| 61 |
| 62 #endif // CHROME_BROWSER_SAFE_JSON_PARSER_H_ |
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