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_ 63