https://www.baja-mex.com/jquery.JSON.js

1/*
2 * This document is licensed as free software under the terms of the
3 * MIT License: <a href="http://www.opensource.org/licenses/mit-license.php" title="http://www.opensource.org/licenses/mit-license.php">http://www.opensource.org/licenses/mit-license.php</a>
4 *
5 * Adapted by Rahul Singla.
6 *
7 * Brantley Harris wrote this plugin. It is based somewhat on the JSON.org 
8 * website's <a href="http://www.json.org/json2.js" title="http://www.json.org/json2.js">http://www.json.org/json2.js</a>, which proclaims:
9 * "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
10 * I uphold.
11 *
12 * It is also influenced heavily by MochiKit's serializeJSON, which is 
13 * copyrighted 2005 by Bob Ippolito.
14 */
15
16/**
17 * jQuery.JSON.encode( json-serializble ) Converts the given argument into a
18 * JSON respresentation.
19 * 
20 * If an object has a "toJSON" function, that will be used to get the
21 * representation. Non-integer/string keys are skipped in the object, as are
22 * keys that point to a function.
23 * 
24 * json-serializble: The *thing* to be converted.
25 */
26jQuery.JSON = {
27	encode: function(o) {
28		if (typeof (JSON) == 'object' && JSON.stringify)
29			return JSON.stringify(o);
30
31		var type = typeof (o);
32
33		if (o === null)
34			return "null";
35
36		if (type == "undefined")
37			return undefined;
38
39		if (type == "number" || type == "boolean")
40			return o + "";
41
42		if (type == "string")
43			return this.quoteString(o);
44
45		if (type == 'object') {
46			if (typeof o.toJSON == "function")
47				return this.encode(o.toJSON());
48
49			if (o.constructor === Date) {
50				var month = o.getUTCMonth() + 1;
51				if (month < 10)

52					month = '0' + month;
53
54				var day = o.getUTCDate();
55				if (day < 10)
56					day = '0' + day;
57
58				var year = o.getUTCFullYear();
59
60				var hours = o.getUTCHours();
61				if (hours < 10)
62					hours = '0' + hours;
63
64				var minutes = o.getUTCMinutes();
65				if (minutes < 10)
66					minutes = '0' + minutes;
67
68				var seconds = o.getUTCSeconds();
69				if (seconds < 10)
70					seconds = '0' + seconds;
71
72				var milli = o.getUTCMilliseconds();
73				if (milli < 100)
74					milli = '0' + milli;
75				if (milli < 10)
76					milli = '0' + milli;
77
78				return '"' + year + '-' + month + '-' + day + 'T' + hours + ':'
79						+ minutes + ':' + seconds + '.' + milli + 'Z"';
80			}
81
82			if (o.constructor === Array) {
83				var ret = [];
84				for ( var i = 0; i < o.length; i++)
85					ret.push(this.encode(o[i]) || "null");
86
87				return "[" + ret.join(",") + "]";
88			}
89
90			var pairs = [];
91			for ( var k in o) {
92				var name;
93				var type = typeof k;
94
95				if (type == "number")
96					name = '"' + k + '"';
97				else if (type == "string")
98					name = this.quoteString(k);
99				else
100					continue; // skip non-string or number keys
101
102				if (typeof o[k] == "function")
103					continue; // skip pairs where the value is a function.
104
105				var val = this.encode(o[k]);
106
107				pairs.push(name + ":" + val);
108			}
109
110			return "{" + pairs.join(", ") + "}";
111		}
112	},
113
114	/**
115	 * jQuery.JSON.decode(src) Evaluates a given piece of json source.
116	 */
117	decode: function(src) {
118		if (typeof (JSON) == 'object' && JSON.parse)
119			return JSON.parse(src);
120		return eval("(" + src + ")");
121	},
122
123	/**
124	 * jQuery.JSON.decodeSecure(src) Evals JSON in a way that is *more* secure.
125	 */
126	decodeSecure: function(src) {
127		if (typeof (JSON) == 'object' && JSON.parse)
128			return JSON.parse(src);
129
130		var filtered = src;
131		filtered = filtered.replace(/\\["\\\/bfnrtu]/g, '@');
132		filtered = filtered
133				.replace(
134						/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g,
135						']');
136		filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
137
138		if (/^[\],:{}\s]*$/.test(filtered))
139			return eval("(" + src + ")");
140		else
141			throw new SyntaxError("Error parsing JSON, source is not valid.");
142	},
143
144	/**
145	 * jQuery.JSON.quoteString(string) Returns a string-repr of a string, escaping
146	 * quotes intelligently. Mostly a support function for JSON.encode.
147	 * 
148	 * Examples: >>> jQuery.JSON.quoteString("apple") "apple"
149	 * 
150	 * >>> jQuery.JSON.quoteString('"Where are we going?", she asked.') "\"Where
151	 * are we going?\", she asked."
152	 */
153	quoteString: function(string) {
154		if (string.match(this._escapeable)) {
155			return '"' + string.replace(this._escapeable, function(a) {
156				var c = this._meta[a];
157				if (typeof c === 'string')
158					return c;
159				c = a.charCodeAt();
160				return '\\u00' + Math.floor(c / 16).toString(16)
161						+ (c % 16).toString(16);
162			}) + '"';
163		}
164		return '"' + string + '"';
165	},
166
167	_escapeable: /["\\\x00-\x1f\x7f-\x9f]/g,
168
169	_meta: {
170		'\b': '\\b',
171		'\t': '\\t',
172		'\n': '\\n',
173		'\f': '\\f',
174		'\r': '\\r',
175		'"': '\\"',
176		'\\': '\\\\'
177	}
178};