js/jquery/jquery.json-2.2.js

   1 /*
   2  * jQuery JSON Plugin
   3  * version: 2.1 (2009-08-14)
   4  *
   5  * This document is licensed as free software under the terms of the
   6  * MIT License: http://www.opensource.org/licenses/mit-license.php
   7  *
   8  * Brantley Harris wrote this plugin. It is based somewhat on the JSON.org
   9  * website's http://www.json.org/json2.js, which proclaims:
  10  * "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
  11  * I uphold.
  12  *
  13  * It is also influenced heavily by MochiKit's serializeJSON, which is
  14  * copyrighted 2005 by Bob Ippolito.
  15  */
  16
  17 (function($) {
  18     /** jQuery.toJSON( json-serializble )
  19         Converts the given argument into a JSON respresentation.
  20
  21         If an object has a "toJSON" function, that will be used to get the representation.
  22         Non-integer/string keys are skipped in the object, as are keys that point to a function.
  23
  24         json-serializble:
  25             The *thing* to be converted.
  26      **/
  27     $.toJSON = function(o)
  28     {
  29         if (typeof(JSON) == 'object' && JSON.stringify)
  30             return JSON.stringify(o);
  31
  32         var type = typeof(o);
  33
  34         if (o === null)
  35             return "null";
  36
  37         if (type == "undefined")
  38             return undefined;
  39
  40         if (type == "number" || type == "boolean")
  41             return o + "";
  42
  43         if (type == "string")
  44             return $.quoteString(o);
  45
  46         if (type == 'object')
  47         {
  48             if (typeof o.toJSON == "function")
  49                 return $.toJSON( o.toJSON() );
  50
  51             if (o.constructor === Date)
  52             {
  53                 var month = o.getUTCMonth() + 1;
  54                 if (month < 10) month = '0' + month;
  55
  56                 var day = o.getUTCDate();
  57                 if (day < 10) day = '0' + day;
  58
  59                 var year = o.getUTCFullYear();
  60
  61                 var hours = o.getUTCHours();
  62                 if (hours < 10) hours = '0' + hours;
  63
  64                 var minutes = o.getUTCMinutes();
  65                 if (minutes < 10) minutes = '0' + minutes;
  66
  67                 var seconds = o.getUTCSeconds();
  68                 if (seconds < 10) seconds = '0' + seconds;
  69
  70                 var milli = o.getUTCMilliseconds();
  71                 if (milli < 100) milli = '0' + milli;
  72                 if (milli < 10) milli = '0' + milli;
  73
  74                 return '"' + year + '-' + month + '-' + day + 'T' +
  75                              hours + ':' + minutes + ':' + seconds +
  76                              '.' + milli + 'Z"';
  77             }
  78
  79             if (o.constructor === Array)
  80             {
  81                 var ret = [];
  82                 for (var i = 0; i < o.length; i++)
  83                     ret.push( $.toJSON(o[i]) || "null" );
  84
  85                 return "[" + ret.join(",") + "]";
  86             }
  87
  88             var pairs = [];
  89             for (var k in o) {
  90                 var name;
  91                 var type = typeof k;
  92
  93                 if (type == "number")
  94                     name = '"' + k + '"';
  95                 else if (type == "string")
  96                     name = $.quoteString(k);
  97                 else
  98                     continue;  //skip non-string or number keys
  99
 100                 if (typeof o[k] == "function")
 101                     continue;  //skip pairs where the value is a function.
 102
 103                 var val = $.toJSON(o[k]);
 104
 105                 pairs.push(name + ":" + val);
 106             }
 107
 108             return "{" + pairs.join(", ") + "}";
 109         }
 110     };
 111
 112     /** jQuery.evalJSON(src)
 113         Evaluates a given piece of json source.
 114      **/
 115     $.evalJSON = function(src)
 116     {
 117         if (typeof(JSON) == 'object' && JSON.parse)
 118             return JSON.parse(src);
 119         return eval("(" + src + ")");
 120     };
 121
 122     /** jQuery.secureEvalJSON(src)
 123         Evals JSON in a way that is *more* secure.
 124     **/
 125     $.secureEvalJSON = function(src)
 126     {
 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.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
 133         filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
 134
 135         if (/^[\],:{}\s]*$/.test(filtered))
 136             return eval("(" + src + ")");
 137         else
 138             throw new SyntaxError("Error parsing JSON, source is not valid.");
 139     };
 140
 141     /** jQuery.quoteString(string)
 142         Returns a string-repr of a string, escaping quotes intelligently.
 143         Mostly a support function for toJSON.
 144
 145         Examples:
 146             >>> jQuery.quoteString("apple")
 147             "apple"
 148
 149             >>> jQuery.quoteString('"Where are we going?", she asked.')
 150             "\"Where are we going?\", she asked."
 151      **/
 152     $.quoteString = function(string)
 153     {
 154         if (string.match(_escapeable))
 155         {
 156             return '"' + string.replace(_escapeable, function (a)
 157             {
 158                 var c = _meta[a];
 159                 if (typeof c === 'string') return c;
 160                 c = a.charCodeAt();
 161                 return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
 162             }) + '"';
 163         }
 164         return '"' + string + '"';
 165     };
 166
 167     var _escapeable = /["\\\x00-\x1f\x7f-\x9f]/g;
 168
 169     var _meta = {
 170         '\b': '\\b',
 171         '\t': '\\t',
 172         '\n': '\\n',
 173         '\f': '\\f',
 174         '\r': '\\r',
 175         '"' : '\\"',
 176         '\\': '\\\\'
 177     };
 178 })(jQuery);