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1/*� 2 http://www.JSON.org/json2.js� 3 2011-02-23� 4 Public Domain.� 5 NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.� 6 See http://www.JSON.org/js.html� 7 This code should be minified before deployment.� 8 See http://javascript.crockford.com/jsmin.html� 9 USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO� 10 NOT CONTROL.� 11 This file creates a global JSON object containing two methods: stringify� 12 and parse.� 13 JSON.stringify(value, replacer, space)� 14 value any JavaScript value, usually an object or array.� 15 replacer an optional parameter that determines how object� 16 values are stringified for objects. It can be a� 17 function or an array of strings.� 18 space an optional parameter that specifies the indentation� 19 of nested structures. If it is omitted, the text will� 20 be packed without extra whitespace. If it is a number,� 21 it will specify the number of spaces to indent at each� 22 level. If it is a string (such as '\t' or ' '),� 23 it contains the characters used to indent at each level.� 24 This method produces a JSON text from a JavaScript value.� 25 When an object value is found, if the object contains a toJSON� 26 method, its toJSON method will be called and the result will be� 27 stringified. A toJSON method does not serialize: it returns the� 28 value represented by the name/value pair that should be serialized,� 29 or undefined if nothing should be serialized. The toJSON method� 30 will be passed the key associated with the value, and this will be� 31 bound to the value� 32 For example, this would serialize Dates as ISO strings.� 33 Date.prototype.toJSON = function (key) {� 34 function f(n) {� 35 // Format integers to have at least two digits.� 36 return n < 10 ? '0' + n : n;� 37 }� 38 return this.getUTCFullYear() + '-' +� 39 f(this.getUTCMonth() + 1) + '-' +� 40 f(this.getUTCDate()) + 'T' +� 41 f(this.getUTCHours()) + ':' +� 42 f(this.getUTCMinutes()) + ':' +� 43 f(this.getUTCSeconds()) + 'Z';� 44 };� 45 You can provide an optional replacer method. It will be passed the� 46 key and value of each member, with this bound to the containing� 47 object. The value that is returned from your method will be� 48 serialized. If your method returns undefined, then the member will� 49 be excluded from the serialization.� 50 If the replacer parameter is an array of strings, then it will be� 51 used to select the members to be serialized. It filters the results� 52 such that only members with keys listed in the replacer array are� 53 stringified.� 54 Values that do not have JSON representations, such as undefined or� 55 functions, will not be serialized. Such values in objects will be� 56 dropped; in arrays they will be replaced with null. You can use� 57 a replacer function to replace those with JSON values.� 58 JSON.stringify(undefined) returns undefined.� 59 The optional space parameter produces a stringification of the� 60 value that is filled with line breaks and indentation to make it� 61 easier to read.� 62 If the space parameter is a non-empty string, then that string will� 63 be used for indentation. If the space parameter is a number, then� 64 the indentation will be that many spaces.� 65 Example:� 66 text = JSON.stringify(['e', {pluribus: 'unum'}]);� 67 // text is '["e",{"pluribus":"unum"}]'� 68 text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');� 69 // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'� 70 text = JSON.stringify([new Date()], function (key, value) {� 71 return this[key] instanceof Date ?� 72 'Date(' + this[key] + ')' : value;� 73 });� 74 // text is '["Date(---current time---)"]'� 75 JSON.parse(text, reviver)� 76 This method parses a JSON text to produce an object or array.� 77 It can throw a SyntaxError exception.� 78 The optional reviver parameter is a function that can filter and� 79 transform the results. It receives each of the keys and values,� 80 and its return value is used instead of the original value.� 81 If it returns what it received, then the structure is not modified.� 82 If it returns undefined then the member is deleted.� 83 Example:� 84 // Parse the text. Values that look like ISO date strings will� 85 // be converted to Date objects.� 86 myData = JSON.parse(text, function (key, value) {� 87 var a;� 88 if (typeof value === 'string') {� 89 a =� 90/^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);� 91 if (a) {� 92 return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],� 93 +a[5], +a[6]));� 94 }� 95 }� 96 return value;� 97 });� 98 myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {� 99 var d;� 100 if (typeof value === 'string' &&� 101 value.slice(0, 5) === 'Date(' &&� 102 value.slice(-1) === ')') {� 103 d = new Date(value.slice(5, -1));� 104 if (d) {� 105 return d;� 106 }� 107 }� 108 return value;� 109 });� 110 This is a reference implementation. You are free to copy, modify, or� 111 redistribute.� 112*/� 113/*jslint evil: true, strict: false, regexp: false */� 114/*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,� 115 call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,� 116 getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,� 117 lastIndex, length, parse, prototype, push, replace, slice, stringify,� 118 test, toJSON, toString, valueOf� 119*/� 120// Create a JSON object only if one does not already exist. We create the� 121// methods in a closure to avoid creating global variables.� 122var JSON;� 123if (!JSON) {� 124 JSON = {};� 125}� 126(function () {� 127 "use strict";� 128 function f(n) {� 129 // Format integers to have at least two digits.� 130 return n < 10 ? '0' + n : n;� 131 }� 132 if (typeof Date.prototype.toJSON !== 'function') {� 133 Date.prototype.toJSON = function (key) {� 134 return isFinite(this.valueOf()) ?� 135 this.getUTCFullYear() + '-' +� 136 f(this.getUTCMonth() + 1) + '-' +� 137 f(this.getUTCDate()) + 'T' +� 138 f(this.getUTCHours()) + ':' +� 139 f(this.getUTCMinutes()) + ':' +� 140 f(this.getUTCSeconds()) + 'Z' : null;� 141 };� 142 String.prototype.toJSON =� 143 Number.prototype.toJSON =� 144 Boolean.prototype.toJSON = function (key) {� 145 return this.valueOf();� 146 };� 147 }� 148 var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,� 149 escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,� 150 gap,� 151 indent,� 152 meta = { // table of character substitutions� 153 '\b': '\\b',� 154 '\t': '\\t',� 155 '\n': '\\n',� 156 '\f': '\\f',� 157 '\r': '\\r',� 158 '"' : '\\"',� 159 '\\': '\\\\'� 160 },� 161 rep;� 162 function quote(string) {�
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163// If the string contains no control characters, no quote characters, and no� 164// backslash characters, then we can safely slap some quotes around it.� 165// Otherwise we must also replace the offending characters with safe escape� 166// sequences.� 167 escapable.lastIndex = 0;� 168 return escapable.test(string) ? '"' + string.replace(escapable, function (a) {� 169 var c = meta[a];� 170 return typeof c === 'string' ? c :� 171 '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);� 172 }) + '"' : '"' + string + '"';� 173 }� 174 function str(key, holder) {� 175// Produce a string from holder[key].� 176 var i, // The loop counter.� 177 k, // The member key.� 178 v, // The member value.� 179 length,� 180 mind = gap,� 181 partial,� 182 value = holder[key];� 183// If the value has a toJSON method, call it to obtain a replacement value.� 184 if (value && typeof value === 'object' &&� 185 typeof value.toJSON === 'function') {� 186 value = value.toJSON(key);� 187 }� 188// If we were called with a replacer function, then call the replacer to� 189// obtain a replacement value.� 190 if (typeof rep === 'function') {� 191 value = rep.call(holder, key, value);� 192 }� 193// What happens next depends on the value's type.� 194 switch (typeof value) {� 195 case 'string':� 196 return quote(value);� 197 case 'number':� 198// JSON numbers must be finite. Encode non-finite numbers as null.� 199 return isFinite(value) ? String(value) : 'null';� 200 case 'boolean':� 201 case 'null':� 202// If the value is a boolean or null, convert it to a string. Note:� 203// typeof null does not produce 'null'. The case is included here in� 204// the remote chance that this gets fixed someday.� 205 return String(value);� 206// If the type is 'object', we might be dealing with an object or an array or� 207// null.� 208 case 'object':� 209// Due to a specification blunder in ECMAScript, typeof null is 'object',� 210// so watch out for that case.� 211 if (!value) {� 212 return 'null';� 213 }� 214// Make an array to hold the partial results of stringifying this object value.� 215 gap += indent;� 216 partial = [];� 217// Is the value an array?� 218 if (Object.prototype.toString.apply(value) === '[object Array]') {� 219// The value is an array. Stringify every element. Use null as a placeholder� 220// for non-JSON values.� 221 length = value.length;� 222 for (i = 0; i < length; i += 1) {� 223 partial[i] = str(i, value) || 'null';� 224 }� 225// Join all of the elements together, separated with commas, and wrap them in� 226// brackets.� 227 v = partial.length === 0 ? '[]' : gap ?� 228 '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']' :� 229 '[' + partial.join(',') + ']';� 230 gap = mind;� 231 return v;� 232 }� 233// If the replacer is an array, use it to select the members to be stringified.� 234 if (rep && typeof rep === 'object') {� 235 length = rep.length;� 236 for (i = 0; i < length; i += 1) {� 237 if (typeof rep[i] === 'string') {� 238 k = rep[i];� 239 v = str(k, value);� 240 if (v) {� 241 partial.push(quote(k) + (gap ? ': ' : ':') + v);� 242 }� 243 }� 244 }� 245 } else {� 246// Otherwise, iterate through all of the keys in the object.� 247 for (k in value) {� 248 if (Object.prototype.hasOwnProperty.call(value, k)) {� 249 v = str(k, value);� 250 if (v) {� 251 partial.push(quote(k) + (gap ? ': ' : ':') + v);� 252 }� 253 }� 254 }� 255 }� 256// Join all of the member texts together, separated with commas,� 257// and wrap them in braces.� 258 v = partial.length === 0 ? '{}' : gap ?� 259 '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}' :� 260 '{' + partial.join(',') + '}';� 261 gap = mind;� 262 return v;� 263 }� 264 }� 265// If the JSON object does not yet have a stringify method, give it one.� 266 if (typeof JSON.stringify !== 'function') {� 267 JSON.stringify = function (value, replacer, space) {� 268// The stringify method takes a value and an optional replacer, and an optional� 269// space parameter, and returns a JSON text. The replacer can be a function� 270// that can replace values, or an array of strings that will select the keys.� 271// A default replacer method can be provided. Use of the space parameter can� 272// produce text that is more easily readable.� 273 var i;� 274 gap = '';� 275 indent = '';� 276// If the space parameter is a number, make an indent string containing that� 277// many spaces.� 278 if (typeof space === 'number') {� 279 for (i = 0; i < space; i += 1) {� 280 indent += ' ';� 281 }� 282// If the space parameter is a string, it will be used as the indent string.� 283 } else if (typeof space === 'string') {� 284 indent = space;� 285 }� 286// If there is a replacer, it must be a function or an array.� 287// Otherwise, throw an error.� 288 rep = replacer;� 289 if (replacer && typeof replacer !== 'function' &&� 290 (typeof replacer !== 'object' ||� 291 typeof replacer.length !== 'number')) {� 292 throw new Error('JSON.stringify');� 293 }� 294// Make a fake root object containing our value under the key of ''.� 295// Return the result of stringifying the value.� 296 return str('', {'': value});� 297 };� 298 }� 299// If the JSON object does not yet have a parse method, give it one.� 300 if (typeof JSON.parse !== 'function') {� 301 JSON.parse = function (text, reviver) {� 302// The parse method takes a text and an optional reviver function, and returns� 303// a JavaScript value if the text is a valid JSON text.� 304 var j;� 305 function walk(holder, key) {� 306// The walk method is used to recursively walk the resulting structure so� 307// that modifications can be made.� 308 var k, v, value = holder[key];� 309 if (value && typeof value === 'object') {� 310 for (k in value) {� 311 if (Object.prototype.hasOwnProperty.call(value, k)) {� 312 v = walk(value, k);� 313 if (v !== undefined) {� 314 value[k] = v;� 315 } else {� 316 delete value[k];� 317 }� 318 }� 319 }� 320 }� 321 return reviver.call(holder, key, value);� 322 }� 323// Parsing happens in four stages. In the first stage, we replace certain� 324// Unicode characters with escape sequences. JavaScript handles many characters� 325// incorrectly, either silently deleting them, or treating them as line endings.� 326 text = String(text);� 327 cx.lastIndex = 0;� 328 if (cx.test(text)) {� 329 text = text.replace(cx, function (a) {� 330 return '\\u' +� 331 ('0000' + a.charCodeAt(0).toString(16)).slice(-4);� 332 });� 333 }� 334// In the second stage, we run the text against regular expressions that look� 335// for non-JSON patterns. We are especially concerned with '()' and 'new'� 336// because they can cause invocation, and '=' because it can cause mutation.� 337// But just to be safe, we want to reject all unexpected forms.� 338// We split the second stage into 4 regexp operations in order to work around� 339// crippling inefficiencies in IE's and Safari's regexp engines. First we� 340// replace the JSON backslash pairs with '@' (a non-JSON character). Second, we� 341// replace all simple value tokens with ']' characters. Third, we delete all� 342// open brackets that follow a colon or comma or that begin the text. Finally,� 343// we look to see that the remaining characters are only whitespace or ']' or� 344// ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.� 345 if (/^[\],:{}\s]*$/� 346 .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')� 347 .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')� 348 .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {� 349// In the third stage we use the eval function to compile the text into a� 350// JavaScript structure. The '{' operator is subject to a syntactic ambiguity�
351// in JavaScript: it can begin a block or an object literal. We wrap the text� 352// in parens to eliminate the ambiguity.� 353 j = looseJsonParse('(' + text + ')');� 354// In the optional fourth stage, we recursively walk the new structure, passing� 355// each name/value pair to a reviver function for possible transformation.� 356 return typeof reviver === 'function' ?� 357 walk({'': j}, '') : j;� 358 }� 359// If the text is not JSON parseable, then a SyntaxError is thrown.� 360 throw new SyntaxError('JSON.parse');� 361 };� 362 }� 363}()); 364 365function looseJsonParse(obj){ 366 return Function('"use strict";return (' + obj + ')')(); 367}
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