|
1084
|
1 /*
|
|
|
2 json2.js
|
|
|
3 2011-10-19
|
|
|
4
|
|
|
5 Public Domain.
|
|
|
6
|
|
|
7 NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
|
|
|
8
|
|
|
9 See http://www.JSON.org/js.html
|
|
|
10
|
|
|
11
|
|
|
12 This code should be minified before deployment.
|
|
|
13 See http://javascript.crockford.com/jsmin.html
|
|
|
14
|
|
|
15 USE YOUR OWN COPY. IT IS EXTREMELY UNWISE TO LOAD CODE FROM SERVERS YOU DO
|
|
|
16 NOT CONTROL.
|
|
|
17
|
|
|
18
|
|
|
19 This file creates a global JSON object containing two methods: stringify
|
|
|
20 and parse.
|
|
|
21
|
|
|
22 JSON.stringify(value, replacer, space)
|
|
|
23 value any JavaScript value, usually an object or array.
|
|
|
24
|
|
|
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.
|
|
|
28
|
|
|
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.
|
|
|
35
|
|
|
36 This method produces a JSON text from a JavaScript value.
|
|
|
37
|
|
|
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
|
|
|
44 bound to the value
|
|
|
45
|
|
|
46 For example, this would serialize Dates as ISO strings.
|
|
|
47
|
|
|
48 Date.prototype.toJSON = function (key) {
|
|
|
49 function f(n) {
|
|
|
50 // Format integers to have at least two digits.
|
|
|
51 return n < 10 ? '0' + n : n;
|
|
|
52 }
|
|
|
53
|
|
|
54 return this.getUTCFullYear() + '-' +
|
|
|
55 f(this.getUTCMonth() + 1) + '-' +
|
|
|
56 f(this.getUTCDate()) + 'T' +
|
|
|
57 f(this.getUTCHours()) + ':' +
|
|
|
58 f(this.getUTCMinutes()) + ':' +
|
|
|
59 f(this.getUTCSeconds()) + 'Z';
|
|
|
60 };
|
|
|
61
|
|
|
62 You can provide an optional replacer method. It will be passed the
|
|
|
63 key and value of each member, with this bound to the containing
|
|
|
64 object. The value that is returned from your method will be
|
|
|
65 serialized. If your method returns undefined, then the member will
|
|
|
66 be excluded from the serialization.
|
|
|
67
|
|
|
68 If the replacer parameter is an array of strings, then it will be
|
|
|
69 used to select the members to be serialized. It filters the results
|
|
|
70 such that only members with keys listed in the replacer array are
|
|
|
71 stringified.
|
|
|
72
|
|
|
73 Values that do not have JSON representations, such as undefined or
|
|
|
74 functions, will not be serialized. Such values in objects will be
|
|
|
75 dropped; in arrays they will be replaced with null. You can use
|
|
|
76 a replacer function to replace those with JSON values.
|
|
|
77 JSON.stringify(undefined) returns undefined.
|
|
|
78
|
|
|
79 The optional space parameter produces a stringification of the
|
|
|
80 value that is filled with line breaks and indentation to make it
|
|
|
81 easier to read.
|
|
|
82
|
|
|
83 If the space parameter is a non-empty string, then that string will
|
|
|
84 be used for indentation. If the space parameter is a number, then
|
|
|
85 the indentation will be that many spaces.
|
|
|
86
|
|
|
87 Example:
|
|
|
88
|
|
|
89 text = JSON.stringify(['e', {pluribus: 'unum'}]);
|
|
|
90 // text is '["e",{"pluribus":"unum"}]'
|
|
|
91
|
|
|
92
|
|
|
93 text = JSON.stringify(['e', {pluribus: 'unum'}], null, '\t');
|
|
|
94 // text is '[\n\t"e",\n\t{\n\t\t"pluribus": "unum"\n\t}\n]'
|
|
|
95
|
|
|
96 text = JSON.stringify([new Date()], function (key, value) {
|
|
|
97 return this[key] instanceof Date ?
|
|
|
98 'Date(' + this[key] + ')' : value;
|
|
|
99 });
|
|
|
100 // text is '["Date(---current time---)"]'
|
|
|
101
|
|
|
102
|
|
|
103 JSON.parse(text, reviver)
|
|
|
104 This method parses a JSON text to produce an object or array.
|
|
|
105 It can throw a SyntaxError exception.
|
|
|
106
|
|
|
107 The optional reviver parameter is a function that can filter and
|
|
|
108 transform the results. It receives each of the keys and values,
|
|
|
109 and its return value is used instead of the original value.
|
|
|
110 If it returns what it received, then the structure is not modified.
|
|
|
111 If it returns undefined then the member is deleted.
|
|
|
112
|
|
|
113 Example:
|
|
|
114
|
|
|
115 // Parse the text. Values that look like ISO date strings will
|
|
|
116 // be converted to Date objects.
|
|
|
117
|
|
|
118 myData = JSON.parse(text, function (key, value) {
|
|
|
119 var a;
|
|
|
120 if (typeof value === 'string') {
|
|
|
121 a =
|
|
|
122 /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2}(?:\.\d*)?)Z$/.exec(value);
|
|
|
123 if (a) {
|
|
|
124 return new Date(Date.UTC(+a[1], +a[2] - 1, +a[3], +a[4],
|
|
|
125 +a[5], +a[6]));
|
|
|
126 }
|
|
|
127 }
|
|
|
128 return value;
|
|
|
129 });
|
|
|
130
|
|
|
131 myData = JSON.parse('["Date(09/09/2001)"]', function (key, value) {
|
|
|
132 var d;
|
|
|
133 if (typeof value === 'string' &&
|
|
|
134 value.slice(0, 5) === 'Date(' &&
|
|
|
135 value.slice(-1) === ')') {
|
|
|
136 d = new Date(value.slice(5, -1));
|
|
|
137 if (d) {
|
|
|
138 return d;
|
|
|
139 }
|
|
|
140 }
|
|
|
141 return value;
|
|
|
142 });
|
|
|
143
|
|
|
144
|
|
|
145 This is a reference implementation. You are free to copy, modify, or
|
|
|
146 redistribute.
|
|
|
147 */
|
|
|
148
|
|
|
149 /*jslint evil: true, regexp: true */
|
|
|
150
|
|
|
151 /*members "", "\b", "\t", "\n", "\f", "\r", "\"", JSON, "\\", apply,
|
|
|
152 call, charCodeAt, getUTCDate, getUTCFullYear, getUTCHours,
|
|
|
153 getUTCMinutes, getUTCMonth, getUTCSeconds, hasOwnProperty, join,
|
|
|
154 lastIndex, length, parse, prototype, push, replace, slice, stringify,
|
|
|
155 test, toJSON, toString, valueOf
|
|
|
156 */
|
|
|
157
|
|
|
158
|
|
|
159 // Create a JSON object only if one does not already exist. We create the
|
|
|
160 // methods in a closure to avoid creating global variables.
|
|
|
161
|
|
|
162 var JSON;
|
|
|
163 if (!JSON) {
|
|
|
164 JSON = {};
|
|
|
165 }
|
|
|
166
|
|
|
167 (function () {
|
|
|
168 'use strict';
|
|
|
169
|
|
|
170 function f(n) {
|
|
|
171 // Format integers to have at least two digits.
|
|
|
172 return n < 10 ? '0' + n : n;
|
|
|
173 }
|
|
|
174
|
|
|
175 if (typeof Date.prototype.toJSON !== 'function') {
|
|
|
176
|
|
|
177 Date.prototype.toJSON = function (key) {
|
|
|
178
|
|
|
179 return isFinite(this.valueOf())
|
|
|
180 ? this.getUTCFullYear() + '-' +
|
|
|
181 f(this.getUTCMonth() + 1) + '-' +
|
|
|
182 f(this.getUTCDate()) + 'T' +
|
|
|
183 f(this.getUTCHours()) + ':' +
|
|
|
184 f(this.getUTCMinutes()) + ':' +
|
|
|
185 f(this.getUTCSeconds()) + 'Z'
|
|
|
186 : null;
|
|
|
187 };
|
|
|
188
|
|
|
189 String.prototype.toJSON =
|
|
|
190 Number.prototype.toJSON =
|
|
|
191 Boolean.prototype.toJSON = function (key) {
|
|
|
192 return this.valueOf();
|
|
|
193 };
|
|
|
194 }
|
|
|
195
|
|
|
196 var cx = /[\u0000\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
|
|
|
197 escapable = /[\\\"\x00-\x1f\x7f-\x9f\u00ad\u0600-\u0604\u070f\u17b4\u17b5\u200c-\u200f\u2028-\u202f\u2060-\u206f\ufeff\ufff0-\uffff]/g,
|
|
|
198 gap,
|
|
|
199 indent,
|
|
|
200 meta = { // table of character substitutions
|
|
|
201 '\b': '\\b',
|
|
|
202 '\t': '\\t',
|
|
|
203 '\n': '\\n',
|
|
|
204 '\f': '\\f',
|
|
|
205 '\r': '\\r',
|
|
|
206 '"' : '\\"',
|
|
|
207 '\\': '\\\\'
|
|
|
208 },
|
|
|
209 rep;
|
|
|
210
|
|
|
211
|
|
|
212 function quote(string) {
|
|
|
213
|
|
|
214 // If the string contains no control characters, no quote characters, and no
|
|
|
215 // backslash characters, then we can safely slap some quotes around it.
|
|
|
216 // Otherwise we must also replace the offending characters with safe escape
|
|
|
217 // sequences.
|
|
|
218
|
|
|
219 escapable.lastIndex = 0;
|
|
|
220 return escapable.test(string) ? '"' + string.replace(escapable, function (a) {
|
|
|
221 var c = meta[a];
|
|
|
222 return typeof c === 'string'
|
|
|
223 ? c
|
|
|
224 : '\\u' + ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
|
|
|
225 }) + '"' : '"' + string + '"';
|
|
|
226 }
|
|
|
227
|
|
|
228
|
|
|
229 function str(key, holder) {
|
|
|
230
|
|
|
231 // Produce a string from holder[key].
|
|
|
232
|
|
|
233 var i, // The loop counter.
|
|
|
234 k, // The member key.
|
|
|
235 v, // The member value.
|
|
|
236 length,
|
|
|
237 mind = gap,
|
|
|
238 partial,
|
|
|
239 value = holder[key];
|
|
|
240
|
|
|
241 // If the value has a toJSON method, call it to obtain a replacement value.
|
|
|
242
|
|
|
243 if (value && typeof value === 'object' &&
|
|
|
244 typeof value.toJSON === 'function') {
|
|
|
245 value = value.toJSON(key);
|
|
|
246 }
|
|
|
247
|
|
|
248 // If we were called with a replacer function, then call the replacer to
|
|
|
249 // obtain a replacement value.
|
|
|
250
|
|
|
251 if (typeof rep === 'function') {
|
|
|
252 value = rep.call(holder, key, value);
|
|
|
253 }
|
|
|
254
|
|
|
255 // What happens next depends on the value's type.
|
|
|
256
|
|
|
257 switch (typeof value) {
|
|
|
258 case 'string':
|
|
|
259 return quote(value);
|
|
|
260
|
|
|
261 case 'number':
|
|
|
262
|
|
|
263 // JSON numbers must be finite. Encode non-finite numbers as null.
|
|
|
264
|
|
|
265 return isFinite(value) ? String(value) : 'null';
|
|
|
266
|
|
|
267 case 'boolean':
|
|
|
268 case 'null':
|
|
|
269
|
|
|
270 // If the value is a boolean or null, convert it to a string. Note:
|
|
|
271 // typeof null does not produce 'null'. The case is included here in
|
|
|
272 // the remote chance that this gets fixed someday.
|
|
|
273
|
|
|
274 return String(value);
|
|
|
275
|
|
|
276 // If the type is 'object', we might be dealing with an object or an array or
|
|
|
277 // null.
|
|
|
278
|
|
|
279 case 'object':
|
|
|
280
|
|
|
281 // Due to a specification blunder in ECMAScript, typeof null is 'object',
|
|
|
282 // so watch out for that case.
|
|
|
283
|
|
|
284 if (!value) {
|
|
|
285 return 'null';
|
|
|
286 }
|
|
|
287
|
|
|
288 // Make an array to hold the partial results of stringifying this object value.
|
|
|
289
|
|
|
290 gap += indent;
|
|
|
291 partial = [];
|
|
|
292
|
|
|
293 // Is the value an array?
|
|
|
294
|
|
|
295 if (Object.prototype.toString.apply(value) === '[object Array]') {
|
|
|
296
|
|
|
297 // The value is an array. Stringify every element. Use null as a placeholder
|
|
|
298 // for non-JSON values.
|
|
|
299
|
|
|
300 length = value.length;
|
|
|
301 for (i = 0; i < length; i += 1) {
|
|
|
302 partial[i] = str(i, value) || 'null';
|
|
|
303 }
|
|
|
304
|
|
|
305 // Join all of the elements together, separated with commas, and wrap them in
|
|
|
306 // brackets.
|
|
|
307
|
|
|
308 v = partial.length === 0
|
|
|
309 ? '[]'
|
|
|
310 : gap
|
|
|
311 ? '[\n' + gap + partial.join(',\n' + gap) + '\n' + mind + ']'
|
|
|
312 : '[' + partial.join(',') + ']';
|
|
|
313 gap = mind;
|
|
|
314 return v;
|
|
|
315 }
|
|
|
316
|
|
|
317 // If the replacer is an array, use it to select the members to be stringified.
|
|
|
318
|
|
|
319 if (rep && typeof rep === 'object') {
|
|
|
320 length = rep.length;
|
|
|
321 for (i = 0; i < length; i += 1) {
|
|
|
322 if (typeof rep[i] === 'string') {
|
|
|
323 k = rep[i];
|
|
|
324 v = str(k, value);
|
|
|
325 if (v) {
|
|
|
326 partial.push(quote(k) + (gap ? ': ' : ':') + v);
|
|
|
327 }
|
|
|
328 }
|
|
|
329 }
|
|
|
330 } else {
|
|
|
331
|
|
|
332 // Otherwise, iterate through all of the keys in the object.
|
|
|
333
|
|
|
334 for (k in value) {
|
|
|
335 if (Object.prototype.hasOwnProperty.call(value, k)) {
|
|
|
336 v = str(k, value);
|
|
|
337 if (v) {
|
|
|
338 partial.push(quote(k) + (gap ? ': ' : ':') + v);
|
|
|
339 }
|
|
|
340 }
|
|
|
341 }
|
|
|
342 }
|
|
|
343
|
|
|
344 // Join all of the member texts together, separated with commas,
|
|
|
345 // and wrap them in braces.
|
|
|
346
|
|
|
347 v = partial.length === 0
|
|
|
348 ? '{}'
|
|
|
349 : gap
|
|
|
350 ? '{\n' + gap + partial.join(',\n' + gap) + '\n' + mind + '}'
|
|
|
351 : '{' + partial.join(',') + '}';
|
|
|
352 gap = mind;
|
|
|
353 return v;
|
|
|
354 }
|
|
|
355 }
|
|
|
356
|
|
|
357 // If the JSON object does not yet have a stringify method, give it one.
|
|
|
358
|
|
|
359 if (typeof JSON.stringify !== 'function') {
|
|
|
360 JSON.stringify = function (value, replacer, space) {
|
|
|
361
|
|
|
362 // The stringify method takes a value and an optional replacer, and an optional
|
|
|
363 // space parameter, and returns a JSON text. The replacer can be a function
|
|
|
364 // that can replace values, or an array of strings that will select the keys.
|
|
|
365 // A default replacer method can be provided. Use of the space parameter can
|
|
|
366 // produce text that is more easily readable.
|
|
|
367
|
|
|
368 var i;
|
|
|
369 gap = '';
|
|
|
370 indent = '';
|
|
|
371
|
|
|
372 // If the space parameter is a number, make an indent string containing that
|
|
|
373 // many spaces.
|
|
|
374
|
|
|
375 if (typeof space === 'number') {
|
|
|
376 for (i = 0; i < space; i += 1) {
|
|
|
377 indent += ' ';
|
|
|
378 }
|
|
|
379
|
|
|
380 // If the space parameter is a string, it will be used as the indent string.
|
|
|
381
|
|
|
382 } else if (typeof space === 'string') {
|
|
|
383 indent = space;
|
|
|
384 }
|
|
|
385
|
|
|
386 // If there is a replacer, it must be a function or an array.
|
|
|
387 // Otherwise, throw an error.
|
|
|
388
|
|
|
389 rep = replacer;
|
|
|
390 if (replacer && typeof replacer !== 'function' &&
|
|
|
391 (typeof replacer !== 'object' ||
|
|
|
392 typeof replacer.length !== 'number')) {
|
|
|
393 throw new Error('JSON.stringify');
|
|
|
394 }
|
|
|
395
|
|
|
396 // Make a fake root object containing our value under the key of ''.
|
|
|
397 // Return the result of stringifying the value.
|
|
|
398
|
|
|
399 return str('', {'': value});
|
|
|
400 };
|
|
|
401 }
|
|
|
402
|
|
|
403
|
|
|
404 // If the JSON object does not yet have a parse method, give it one.
|
|
|
405
|
|
|
406 if (typeof JSON.parse !== 'function') {
|
|
|
407 JSON.parse = function (text, reviver) {
|
|
|
408
|
|
|
409 // The parse method takes a text and an optional reviver function, and returns
|
|
|
410 // a JavaScript value if the text is a valid JSON text.
|
|
|
411
|
|
|
412 var j;
|
|
|
413
|
|
|
414 function walk(holder, key) {
|
|
|
415
|
|
|
416 // The walk method is used to recursively walk the resulting structure so
|
|
|
417 // that modifications can be made.
|
|
|
418
|
|
|
419 var k, v, value = holder[key];
|
|
|
420 if (value && typeof value === 'object') {
|
|
|
421 for (k in value) {
|
|
|
422 if (Object.prototype.hasOwnProperty.call(value, k)) {
|
|
|
423 v = walk(value, k);
|
|
|
424 if (v !== undefined) {
|
|
|
425 value[k] = v;
|
|
|
426 } else {
|
|
|
427 delete value[k];
|
|
|
428 }
|
|
|
429 }
|
|
|
430 }
|
|
|
431 }
|
|
|
432 return reviver.call(holder, key, value);
|
|
|
433 }
|
|
|
434
|
|
|
435
|
|
|
436 // Parsing happens in four stages. In the first stage, we replace certain
|
|
|
437 // Unicode characters with escape sequences. JavaScript handles many characters
|
|
|
438 // incorrectly, either silently deleting them, or treating them as line endings.
|
|
|
439
|
|
|
440 text = String(text);
|
|
|
441 cx.lastIndex = 0;
|
|
|
442 if (cx.test(text)) {
|
|
|
443 text = text.replace(cx, function (a) {
|
|
|
444 return '\\u' +
|
|
|
445 ('0000' + a.charCodeAt(0).toString(16)).slice(-4);
|
|
|
446 });
|
|
|
447 }
|
|
|
448
|
|
|
449 // In the second stage, we run the text against regular expressions that look
|
|
|
450 // for non-JSON patterns. We are especially concerned with '()' and 'new'
|
|
|
451 // because they can cause invocation, and '=' because it can cause mutation.
|
|
|
452 // But just to be safe, we want to reject all unexpected forms.
|
|
|
453
|
|
|
454 // We split the second stage into 4 regexp operations in order to work around
|
|
|
455 // crippling inefficiencies in IE's and Safari's regexp engines. First we
|
|
|
456 // replace the JSON backslash pairs with '@' (a non-JSON character). Second, we
|
|
|
457 // replace all simple value tokens with ']' characters. Third, we delete all
|
|
|
458 // open brackets that follow a colon or comma or that begin the text. Finally,
|
|
|
459 // we look to see that the remaining characters are only whitespace or ']' or
|
|
|
460 // ',' or ':' or '{' or '}'. If that is so, then the text is safe for eval.
|
|
|
461
|
|
|
462 if (/^[\],:{}\s]*$/
|
|
|
463 .test(text.replace(/\\(?:["\\\/bfnrt]|u[0-9a-fA-F]{4})/g, '@')
|
|
|
464 .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
|
|
|
465 .replace(/(?:^|:|,)(?:\s*\[)+/g, ''))) {
|
|
|
466
|
|
|
467 // In the third stage we use the eval function to compile the text into a
|
|
|
468 // JavaScript structure. The '{' operator is subject to a syntactic ambiguity
|
|
|
469 // in JavaScript: it can begin a block or an object literal. We wrap the text
|
|
|
470 // in parens to eliminate the ambiguity.
|
|
|
471
|
|
|
472 j = eval('(' + text + ')');
|
|
|
473
|
|
|
474 // In the optional fourth stage, we recursively walk the new structure, passing
|
|
|
475 // each name/value pair to a reviver function for possible transformation.
|
|
|
476
|
|
|
477 return typeof reviver === 'function'
|
|
|
478 ? walk({'': j}, '')
|
|
|
479 : j;
|
|
|
480 }
|
|
|
481
|
|
|
482 // If the text is not JSON parseable, then a SyntaxError is thrown.
|
|
|
483
|
|
|
484 throw new SyntaxError('JSON.parse');
|
|
|
485 };
|
|
|
486 }
|
|
|
487 }());
|
