1 // Copyright 2015 The Weave 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 "src/utils.h" 6 7 #include <base/bind_helpers.h> 8 #include <base/json/json_reader.h> 9 10 #include "src/json_error_codes.h" 11 12 namespace weave { 13 14 namespace { 15 16 // Truncates a string if it is too long. Used for error reporting with really 17 // long JSON strings. 18 std::string LimitString(const std::string& text, size_t max_len) { 19 if (text.size() <= max_len) 20 return text; 21 return text.substr(0, max_len - 3) + "..."; 22 } 23 24 const size_t kMaxStrLen = 1700; // Log messages are limited to 2000 chars. 25 26 const char kErrorCodeKey[] = "code"; 27 const char kErrorMessageKey[] = "message"; 28 29 } // anonymous namespace 30 31 namespace errors { 32 const char kSchemaError[] = "schema_error"; 33 const char kInvalidCategoryError[] = "invalid_category"; 34 const char kInvalidPackageError[] = "invalid_package"; 35 } // namespace errors 36 37 std::unique_ptr<base::DictionaryValue> LoadJsonDict( 38 const std::string& json_string, 39 ErrorPtr* error) { 40 std::unique_ptr<base::DictionaryValue> result; 41 std::string error_message; 42 auto value = base::JSONReader::ReadAndReturnError( 43 json_string, base::JSON_PARSE_RFC, nullptr, &error_message); 44 if (!value) { 45 Error::AddToPrintf(error, FROM_HERE, errors::json::kParseError, 46 "Error parsing JSON string '%s' (%zu): %s", 47 LimitString(json_string, kMaxStrLen).c_str(), 48 json_string.size(), error_message.c_str()); 49 return result; 50 } 51 base::DictionaryValue* dict_value = nullptr; 52 if (!value->GetAsDictionary(&dict_value)) { 53 Error::AddToPrintf(error, FROM_HERE, errors::json::kObjectExpected, 54 "JSON string '%s' is not a JSON object", 55 LimitString(json_string, kMaxStrLen).c_str()); 56 return result; 57 } else { 58 // |value| is now owned by |dict_value|. 59 base::IgnoreResult(value.release()); 60 } 61 result.reset(dict_value); 62 return result; 63 } 64 65 std::unique_ptr<base::DictionaryValue> ErrorInfoToJson(const Error& error) { 66 std::unique_ptr<base::DictionaryValue> output{new base::DictionaryValue}; 67 output->SetString(kErrorMessageKey, error.GetMessage()); 68 output->SetString(kErrorCodeKey, error.GetCode()); 69 return output; 70 } 71 72 } // namespace weave 73
