7 NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
9 See http://www.JSON.org/js.html
12 This code should be minified before deployment.
13 See http://javascript.crockford.com/jsmin.html
15 USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
19 This file creates a global JSON object containing two methods: stringify
22 JSON.stringify(value, replacer, space)
23 value any JavaScript value, usually an object or array.
25 replacer an optional parameter that determines how object
26 values are stringified for objects. It can be a
27 function or an array of strings.
29 space an optional parameter that specifies the indentation
30 of nested structures. If it is omitted, the text will
31 be packed without extra whitespace. If it is a number,
32 it will specify the number of spaces to indent at each
33 level. If it is a string (such as '\t' or ' '),
34 it contains the characters used to indent at each level.
36 This method produces a JSON text from a JavaScript value.
38 When an object value is found, if the object contains a toJSON
39 method, its toJSON method will be called and the result will be
40 stringified. A toJSON method does not serialize: it returns the
41 value represented by the name/value pair that should be serialized,
42 or undefined if nothing should be serialized. The toJSON method
43 will be passed the key associated with the value, and this will be
46 For example, this would serialize Dates as ISO strings.
48 Date.prototype.toJSON = function (key) {
50 // Format integers to have at least two digits.
56 return this.getUTCFullYear() + '-' +
57 f(this.getUTCMonth() + 1) + '-' +
58 f(this.getUTCDate()) + 'T' +
59 f(this.getUTCHours()) + ':' +
60 f(this.getUTCMinutes()) + ':' +
61 f(this.getUTCSeconds()) + 'Z';
64 You can provide an optional replacer method. It will be passed the
65 key and value of each member, with this bound to the containing
66 object. The value that is returned from your method will be
67 serialized. If your method returns undefined, then the member will
68 be excluded from the serialization.
70 If the replacer parameter is an array of strings, then it will be
71 used to select the members to be serialized. It filters the results
72 such that only members with keys listed in the replacer array are
75 Values that do not have JSON representations, such as undefined or
76 functions, will not be serialized. Such values in objects will be
77 dropped; in arrays they will be replaced with null. You can use
78 a replacer function to replace those with JSON values.
79 JSON.stringify(undefined) returns undefined.
81 The optional space parameter produces a stringification of the
82 value that is filled with line breaks and indentation to make it
85 If the space parameter is a non-empty string, then that string will
86 be used for indentation. If the space parameter is a number, then
87 the indentation will be that many spaces.
91 text = JSON.stringify(['e', {pluribus: 'unum'}]);
92 // text is '["e",{"pluribus":"unum"}]'
95 text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
96 // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
98 text = JSON.stringify([new Date()], function (key, value) {
99 return this[key] instanceof Date ?
100 'Date(' + this[key] + ')' : value;
102 // text is '["Date(---current time---)"]'
105 JSON.parse(text, reviver)
106 This method parses a JSON text to produce an object or array.
107 It can throw a SyntaxError exception.
109 The optional reviver parameter is a function that can filter and
110 transform the results. It receives each of the keys and values,
111 and its return value is used instead of the original value.
112 If it returns what it received, then the structure is not modified.
113 If it returns undefined then the member is deleted.
117 // Parse the text. Values that look like ISO date strings will
118 // be converted to Date objects.
120 myData = JSON.parse(text, function (key, value) {
122 if (typeof value === 'string') {
124 /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
126 return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
133 myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
135 if (typeof value === 'string' &&
136 value.slice(0, 5) === 'Date(' &&
137 value.slice(-1) === ')') {
138 d = new Date(value.slice(5, -1));
147 This is a reference implementation. You are free to copy, modify, or
156 JSON, apply, call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
157 getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
158 lastIndex, length, parse, prototype, push, replace, slice, stringify,
159 test, toJSON, toString, valueOf
163 // Create a JSON object only if one does not already exist. We create the
164 // methods in a closure to avoid creating global variables.
166 if (typeof JSON !== 'object') {
174 // Format integers to have at least two digits.
180 function this_value() {
181 return this.valueOf();
184 if (typeof Date.prototype.toJSON !== 'function') {
186 Date.prototype.toJSON = function () {
188 return isFinite(this.valueOf())
189 ? this.getUTCFullYear() + '-' +
190 f(this.getUTCMonth() + 1) + '-' +
191 f(this.getUTCDate()) + 'T' +
192 f(this.getUTCHours()) + ':' +
193 f(this.getUTCMinutes()) + ':' +
194 f(this.getUTCSeconds()) + 'Z'
198 Boolean.prototype.toJSON = this_value;
199 Number.prototype.toJSON = this_value;
200 String.prototype.toJSON = this_value;
211 function quote(string) {
213 // If the string contains no control characters, no quote characters, and no
214 // backslash characters, then we can safely slap some quotes around it.
215 // Otherwise we must also replace the offending characters with safe escape
218 escapable.lastIndex = 0;
219 return escapable.test(string)
220 ? '"' + string.replace(escapable, function (a) {
222 return typeof c === 'string'
224 : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
226 : '"' + string + '"';
230 function str(key, holder) {
232 // Produce a string from holder[key].
234 var i, // The loop counter.
235 k, // The member key.
236 v, // The member value.
242 // If the value has a toJSON method, call it to obtain a replacement value.
244 if (value && typeof value === 'object' &&
245 typeof value.toJSON === 'function') {
246 value = value.toJSON(key);
249 // If we were called with a replacer function, then call the replacer to
250 // obtain a replacement value.
252 if (typeof rep === 'function') {
253 value = rep.call(holder, key, value);
256 // What happens next depends on the value's type.
258 switch (typeof value) {
264 // JSON numbers must be finite. Encode non-finite numbers as null.
266 return isFinite(value)
273 // If the value is a boolean or null, convert it to a string. Note:
274 // typeof null does not produce 'null'. The case is included here in
275 // the remote chance that this gets fixed someday.
277 return String(value);
279 // If the type is 'object', we might be dealing with an object or an array or
284 // Due to a specification blunder in ECMAScript, typeof null is 'object',
285 // so watch out for that case.
291 // Make an array to hold the partial results of stringifying this object value.
296 // Is the value an array?
298 if (Object.prototype.toString.apply(value) === '[object Array]') {
300 // The value is an array. Stringify every element. Use null as a placeholder
301 // for non-JSON values.
303 length = value.length;
304 for (i = 0; i < length; i += 1) {
305 partial[i] = str(i, value) || 'null';
308 // Join all of the elements together, separated with commas, and wrap them in
311 v = partial.length === 0
314 ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
315 : '[' + partial.join(',') + ']';
320 // If the replacer is an array, use it to select the members to be stringified.
322 if (rep && typeof rep === 'object') {
324 for (i = 0; i < length; i += 1) {
325 if (typeof rep[i] === 'string') {
329 partial.push(quote(k) + (
339 // Otherwise, iterate through all of the keys in the object.
342 if (Object.prototype.hasOwnProperty.call(value, k)) {
345 partial.push(quote(k) + (
355 // Join all of the member texts together, separated with commas,
356 // and wrap them in braces.
358 v = partial.length === 0
361 ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
362 : '{' + partial.join(',') + '}';
368 // If the JSON object does not yet have a stringify method, give it one.
370 if (typeof JSON.stringify !== 'function') {
371 escapable = /[\\\"\u0000-\u001f\u007f-\u009f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
372 meta = { // table of character substitutions
381 JSON.stringify = function (value, replacer, space) {
383 // The stringify method takes a value and an optional replacer, and an optional
384 // space parameter, and returns a JSON text. The replacer can be a function
385 // that can replace values, or an array of strings that will select the keys.
386 // A default replacer method can be provided. Use of the space parameter can
387 // produce text that is more easily readable.
393 // If the space parameter is a number, make an indent string containing that
396 if (typeof space === 'number') {
397 for (i = 0; i < space; i += 1) {
401 // If the space parameter is a string, it will be used as the indent string.
403 } else if (typeof space === 'string') {
407 // If there is a replacer, it must be a function or an array.
408 // Otherwise, throw an error.
411 if (replacer && typeof replacer !== 'function' &&
412 (typeof replacer !== 'object' ||
413 typeof replacer.length !== 'number')) {
414 throw new Error('JSON.stringify');
417 // Make a fake root object containing our value under the key of ''.
418 // Return the result of stringifying the value.
420 return str('', {'': value});
425 // If the JSON object does not yet have a parse method, give it one.
427 if (typeof JSON.parse !== 'function') {
428 cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g;
429 JSON.parse = function (text, reviver) {
431 // The parse method takes a text and an optional reviver function, and returns
432 // a JavaScript value if the text is a valid JSON text.
436 function walk(holder, key) {
438 // The walk method is used to recursively walk the resulting structure so
439 // that modifications can be made.
441 var k, v, value = holder[key];
442 if (value && typeof value === 'object') {
444 if (Object.prototype.hasOwnProperty.call(value, k)) {
446 if (v !== undefined) {
454 return reviver.call(holder, key, value);
458 // Parsing happens in four stages. In the first stage, we replace certain
459 // Unicode characters with escape sequences. JavaScript handles many characters
460 // incorrectly, either silently deleting them, or treating them as line endings.
465 text = text.replace(cx, function (a) {
467 ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
471 // In the second stage, we run the text against regular expressions that look
472 // for non-JSON patterns. We are especially concerned with '()' and 'new'
473 // because they can cause invocation, and '=' because it can cause mutation.
474 // But just to be safe, we want to reject all unexpected forms.
476 // We split the second stage into 4 regexp operations in order to work around
477 // crippling inefficiencies in IE's and Safari's regexp engines. First we
478 // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
479 // replace all simple value tokens with ']' characters. Third, we delete all
480 // open brackets that follow a colon or comma or that begin the text. Finally,
481 // we look to see that the remaining characters are only whitespace or ']' or
482 // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
485 /^[\],:{}\s]*$/.test(
486 text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
487 .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
488 .replace(/(?:^|:|,)(?:\s*\[)+/g, '')
492 // In the third stage we use the eval function to compile the text into a
493 // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
494 // in JavaScript: it can begin a block or an object literal. We wrap the text
495 // in parens to eliminate the ambiguity.
497 j = eval('(' + text + ')');
499 // In the optional fourth stage, we recursively walk the new structure, passing
500 // each name/value pair to a reviver function for possible transformation.
502 return typeof reviver === 'function'
507 // If the text is not JSON parseable, then a SyntaxError is thrown.
509 throw new SyntaxError('JSON.parse');