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| 1 // Copyright (c) 2012 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 "base/json/json_reader.h" | |
| 6 | |
| 7 #include "base/json/json_parser.h" | |
| 8 #include "base/logging.h" | |
| 9 #include "base/values.h" | |
| 10 | |
| 11 namespace base { | |
| 12 | |
| 13 // Values 1000 and above are used by JSONFileValueSerializer::JsonFileError. | |
| 14 COMPILE_ASSERT(JSONReader::JSON_PARSE_ERROR_COUNT < 1000, | |
| 15 json_reader_error_out_of_bounds); | |
| 16 | |
| 17 const char JSONReader::kInvalidEscape[] = | |
| 18 "Invalid escape sequence."; | |
| 19 const char JSONReader::kSyntaxError[] = | |
| 20 "Syntax error."; | |
| 21 const char JSONReader::kUnexpectedToken[] = | |
| 22 "Unexpected token."; | |
| 23 const char JSONReader::kTrailingComma[] = | |
| 24 "Trailing comma not allowed."; | |
| 25 const char JSONReader::kTooMuchNesting[] = | |
| 26 "Too much nesting."; | |
| 27 const char JSONReader::kUnexpectedDataAfterRoot[] = | |
| 28 "Unexpected data after root element."; | |
| 29 const char JSONReader::kUnsupportedEncoding[] = | |
| 30 "Unsupported encoding. JSON must be UTF-8."; | |
| 31 const char JSONReader::kUnquotedDictionaryKey[] = | |
| 32 "Dictionary keys must be quoted."; | |
| 33 | |
| 34 JSONReader::JSONReader() | |
| 35 : JSONReader(JSON_PARSE_RFC) { | |
| 36 } | |
| 37 | |
| 38 JSONReader::JSONReader(int options) | |
| 39 : parser_(new internal::JSONParser(options)) { | |
| 40 } | |
| 41 | |
| 42 JSONReader::~JSONReader() { | |
| 43 } | |
| 44 | |
| 45 // static | |
| 46 Value* JSONReader::DeprecatedRead(const StringPiece& json) { | |
| 47 return Read(json).release(); | |
| 48 } | |
| 49 | |
| 50 // static | |
| 51 scoped_ptr<Value> JSONReader::Read(const StringPiece& json) { | |
| 52 internal::JSONParser parser(JSON_PARSE_RFC); | |
| 53 return make_scoped_ptr(parser.Parse(json)); | |
| 54 } | |
| 55 | |
| 56 // static | |
| 57 Value* JSONReader::DeprecatedRead(const StringPiece& json, int options) { | |
| 58 return Read(json, options).release(); | |
| 59 } | |
| 60 | |
| 61 // static | |
| 62 scoped_ptr<Value> JSONReader::Read(const StringPiece& json, int options) { | |
| 63 internal::JSONParser parser(options); | |
| 64 return make_scoped_ptr(parser.Parse(json)); | |
| 65 } | |
| 66 | |
| 67 // static | |
| 68 Value* JSONReader::DeprecatedReadAndReturnError(const StringPiece& json, | |
| 69 int options, | |
| 70 int* error_code_out, | |
| 71 std::string* error_msg_out) { | |
| 72 return ReadAndReturnError(json, options, error_code_out, error_msg_out) | |
| 73 .release(); | |
| 74 } | |
| 75 | |
| 76 // static | |
| 77 scoped_ptr<Value> JSONReader::ReadAndReturnError(const StringPiece& json, | |
| 78 int options, | |
| 79 int* error_code_out, | |
| 80 std::string* error_msg_out) { | |
| 81 internal::JSONParser parser(options); | |
| 82 scoped_ptr<Value> root(parser.Parse(json)); | |
| 83 if (!root) { | |
| 84 if (error_code_out) | |
| 85 *error_code_out = parser.error_code(); | |
| 86 if (error_msg_out) | |
| 87 *error_msg_out = parser.GetErrorMessage(); | |
| 88 } | |
| 89 | |
| 90 return root; | |
| 91 } | |
| 92 | |
| 93 // static | |
| 94 std::string JSONReader::ErrorCodeToString(JsonParseError error_code) { | |
| 95 switch (error_code) { | |
| 96 case JSON_NO_ERROR: | |
| 97 return std::string(); | |
| 98 case JSON_INVALID_ESCAPE: | |
| 99 return kInvalidEscape; | |
| 100 case JSON_SYNTAX_ERROR: | |
| 101 return kSyntaxError; | |
| 102 case JSON_UNEXPECTED_TOKEN: | |
| 103 return kUnexpectedToken; | |
| 104 case JSON_TRAILING_COMMA: | |
| 105 return kTrailingComma; | |
| 106 case JSON_TOO_MUCH_NESTING: | |
| 107 return kTooMuchNesting; | |
| 108 case JSON_UNEXPECTED_DATA_AFTER_ROOT: | |
| 109 return kUnexpectedDataAfterRoot; | |
| 110 case JSON_UNSUPPORTED_ENCODING: | |
| 111 return kUnsupportedEncoding; | |
| 112 case JSON_UNQUOTED_DICTIONARY_KEY: | |
| 113 return kUnquotedDictionaryKey; | |
| 114 default: | |
| 115 NOTREACHED(); | |
| 116 return std::string(); | |
| 117 } | |
| 118 } | |
| 119 | |
| 120 scoped_ptr<Value> JSONReader::ReadToValue(const std::string& json) { | |
| 121 return make_scoped_ptr(parser_->Parse(json)); | |
| 122 } | |
| 123 | |
| 124 JSONReader::JsonParseError JSONReader::error_code() const { | |
| 125 return parser_->error_code(); | |
| 126 } | |
| 127 | |
| 128 std::string JSONReader::GetErrorMessage() const { | |
| 129 return parser_->GetErrorMessage(); | |
| 130 } | |
| 131 | |
| 132 } // namespace base | |
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