1 // Copyright 2014 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 #include "extensions/common/features/json_feature_provider_source.h" 6 7 #include "base/json/json_reader.h" 8 #include "base/logging.h" 9 #include "ui/base/resource/resource_bundle.h" 10 11 namespace extensions { 12 JSONFeatureProviderSource(const std::string & name)13JSONFeatureProviderSource::JSONFeatureProviderSource(const std::string& name) 14 : name_(name) { 15 } 16 ~JSONFeatureProviderSource()17JSONFeatureProviderSource::~JSONFeatureProviderSource() { 18 } 19 LoadJSON(int resource_id)20void JSONFeatureProviderSource::LoadJSON(int resource_id) { 21 const std::string& features_file = ResourceBundle::GetSharedInstance() 22 .GetRawDataResource(resource_id) 23 .as_string(); 24 int error_code = 0; 25 std::string error_message; 26 scoped_ptr<base::Value> value(base::JSONReader::ReadAndReturnError( 27 features_file, base::JSON_PARSE_RFC, &error_code, &error_message)); 28 DCHECK(value) << "Could not load features: " << name_ << " " << error_message; 29 30 scoped_ptr<base::DictionaryValue> value_as_dict; 31 if (value) { 32 CHECK(value->IsType(base::Value::TYPE_DICTIONARY)) << name_; 33 value_as_dict.reset(static_cast<base::DictionaryValue*>(value.release())); 34 } else { 35 // There was some error loading the features file. 36 // http://crbug.com/176381 37 value_as_dict.reset(new base::DictionaryValue()); 38 } 39 40 // Ensure there are no key collisions. 41 for (base::DictionaryValue::Iterator iter(*value_as_dict); !iter.IsAtEnd(); 42 iter.Advance()) { 43 if (dictionary_.GetWithoutPathExpansion(iter.key(), NULL)) 44 LOG(FATAL) << "Key " << iter.key() << " is defined in " << name_ 45 << " JSON feature files more than once."; 46 } 47 48 // Merge. 49 dictionary_.MergeDictionary(value_as_dict.get()); 50 } 51 52 } // namespace extensions 53