resources/jquery/jquery.json.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  * @see http://code.google.com/p/jquery-json/
  17  */
  18
  19 (function($) {
  20     /** jQuery.toJSON( json-serializble )
  21         Converts the given argument into a JSON respresentation.
  22
  23         If an object has a "toJSON" function, that will be used to get the representation.
  24         Non-integer/string keys are skipped in the object, as are keys that point to a function.
  25
  26         json-serializble:
  27             The *thing* to be converted.
  28      **/
  29     $.toJSON = function(o)
  30     {
  31         if (typeof(JSON) == 'object' && JSON.stringify)
  32             return JSON.stringify(o);
  33
  34         var type = typeof(o);
  35
  36         if (o === null)
  37             return "null";
  38
  39         if (type == "undefined")
  40             return undefined;
  41
  42         if (type == "number" || type == "boolean")
  43             return o + "";
  44
  45         if (type == "string")
  46             return $.quoteString(o);
  47
  48         if (type == 'object')
  49         {
  50             if (typeof o.toJSON == "function")
  51                 return $.toJSON( o.toJSON() );
  52
  53             if (o.constructor === Date)
  54             {
  55                 var month = o.getUTCMonth() + 1;
  56                 if (month < 10) month = '0' + month;
  57
  58                 var day = o.getUTCDate();
  59                 if (day < 10) day = '0' + day;
  60
  61                 var year = o.getUTCFullYear();
  62
  63                 var hours = o.getUTCHours();
  64                 if (hours < 10) hours = '0' + hours;
  65
  66                 var minutes = o.getUTCMinutes();
  67                 if (minutes < 10) minutes = '0' + minutes;
  68
  69                 var seconds = o.getUTCSeconds();
  70                 if (seconds < 10) seconds = '0' + seconds;
  71
  72                 var milli = o.getUTCMilliseconds();
  73                 if (milli < 100) milli = '0' + milli;
  74                 if (milli < 10) milli = '0' + milli;
  75
  76                 return '"' + year + '-' + month + '-' + day + 'T' +
  77                              hours + ':' + minutes + ':' + seconds +
  78                              '.' + milli + 'Z"';
  79             }
  80
  81             if (o.constructor === Array)
  82             {
  83                 var ret = [];
  84                 for (var i = 0; i < o.length; i++)
  85                     ret.push( $.toJSON(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 = $.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 = $.toJSON(o[k]);
 106
 107                 pairs.push(name + ":" + val);
 108             }
 109
 110             return "{" + pairs.join(", ") + "}";
 111         }
 112     };
 113
 114     /** jQuery.evalJSON(src)
 115         Evaluates a given piece of json source.
 116      **/
 117     $.evalJSON = function(src)
 118     {
 119         if (typeof(JSON) == 'object' && JSON.parse)
 120             return JSON.parse(src);
 121         return eval("(" + src + ")");
 122     };
 123
 124     /** jQuery.secureEvalJSON(src)
 125         Evals JSON in a way that is *more* secure.
 126     **/
 127     $.secureEvalJSON = function(src)
 128     {
 129         if (typeof(JSON) == 'object' && JSON.parse)
 130             return JSON.parse(src);
 131
 132         var filtered = src;
 133         filtered = filtered.replace(/\\["\\\/bfnrtu]/g, '@');
 134         filtered = filtered.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']');
 135         filtered = filtered.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
 136
 137         if (/^[\],:{}\s]*$/.test(filtered))
 138             return eval("(" + src + ")");
 139         else
 140             throw new SyntaxError("Error parsing JSON, source is not valid.");
 141     };
 142
 143     /** jQuery.quoteString(string)
 144         Returns a string-repr of a string, escaping quotes intelligently.
 145         Mostly a support function for toJSON.
 146
 147         Examples:
 148             >>> jQuery.quoteString("apple")
 149             "apple"
 150
 151             >>> jQuery.quoteString('"Where are we going?", she asked.')
 152             "\"Where are we going?\", she asked."
 153      **/
 154     $.quoteString = function(string)
 155     {
 156         if (string.match(_escapeable))
 157         {
 158             return '"' + string.replace(_escapeable, function (a)
 159             {
 160                 var c = _meta[a];
 161                 if (typeof c === 'string') return c;
 162                 c = a.charCodeAt();
 163                 return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
 164             }) + '"';
 165         }
 166         return '"' + string + '"';
 167     };
 168
 169     var _escapeable = /["\\\x00-\x1f\x7f-\x9f]/g;
 170
 171     var _meta = {
 172         '\b': '\\b',
 173         '\t': '\\t',
 174         '\n': '\\n',
 175         '\f': '\\f',
 176         '\r': '\\r',
 177         '"' : '\\"',
 178         '\\': '\\\\'
 179     };
 180 })(jQuery);