resources/jquery/jquery.json.js

   1 /**
   2  * jQuery JSON Plugin
   3  * version: 2.3 (2011-09-17)
   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
  19         var     escapeable = /["\\\x00-\x1f\x7f-\x9f]/g,
  20                         meta = {
  21                                 '\b': '\\b',
  22                                 '\t': '\\t',
  23                                 '\n': '\\n',
  24                                 '\f': '\\f',
  25                                 '\r': '\\r',
  26                                 '"' : '\\"',
  27                                 '\\': '\\\\'
  28                         };
  29
  30         /**
  31          * jQuery.toJSON
  32          * Converts the given argument into a JSON respresentation.
  33          *
  34          * @param o {Mixed} The json-serializble *thing* to be converted
  35          *
  36          * If an object has a toJSON prototype, that will be used to get the representation.
  37          * Non-integer/string keys are skipped in the object, as are keys that point to a
  38          * function.
  39          *
  40          */
  41         $.toJSON = typeof JSON === 'object' && JSON.stringify
  42                         ? JSON.stringify
  43                         : function( o ) {
  44
  45                 if ( o === null ) {
  46                         return 'null';
  47                 }
  48
  49                 var type = typeof o;
  50
  51                 if ( type === 'undefined' ) {
  52                         return undefined;
  53                 }
  54                 if ( type === 'number' || type === 'boolean' ) {
  55                         return '' + o;
  56                 }
  57                 if ( type === 'string') {
  58                         return $.quoteString( o );
  59                 }
  60                 if ( type === 'object' ) {
  61                         if ( typeof o.toJSON === 'function' ) {
  62                                 return $.toJSON( o.toJSON() );
  63                         }
  64                         if ( o.constructor === Date ) {
  65                                 var     month = o.getUTCMonth() + 1,
  66                                                 day = o.getUTCDate(),
  67                                                 year = o.getUTCFullYear(),
  68                                                 hours = o.getUTCHours(),
  69                                                 minutes = o.getUTCMinutes(),
  70                                                 seconds = o.getUTCSeconds(),
  71                                                 milli = o.getUTCMilliseconds();
  72
  73                                 if ( month < 10 ) {
  74                                         month = '0' + month;
  75                                 }
  76                                 if ( day < 10 ) {
  77                                         day = '0' + day;
  78                                 }
  79                                 if ( hours < 10 ) {
  80                                         hours = '0' + hours;
  81                                 }
  82                                 if ( minutes < 10 ) {
  83                                         minutes = '0' + minutes;
  84                                 }
  85                                 if ( seconds < 10 ) {
  86                                         seconds = '0' + seconds;
  87                                 }
  88                                 if ( milli < 100 ) {
  89                                         milli = '0' + milli;
  90                                 }
  91                                 if ( milli < 10 ) {
  92                                         milli = '0' + milli;
  93                                 }
  94                                 return '"' + year + '-' + month + '-' + day + 'T' +
  95                                                 hours + ':' + minutes + ':' + seconds +
  96                                                 '.' + milli + 'Z"';
  97                         }
  98                         if ( o.constructor === Array ) {
  99                                 var ret = [];
 100                                 for ( var i = 0; i < o.length; i++ ) {
 101                                         ret.push( $.toJSON( o[i] ) || 'null' );
 102                                 }
 103                                 return '[' + ret.join(',') + ']';
 104                         }
 105                         var     name,
 106                                         val,
 107                                         pairs = [];
 108                         for ( var k in o ) {
 109                                 type = typeof k;
 110                                 if ( type === 'number' ) {
 111                                         name = '"' + k + '"';
 112                                 } else if (type === 'string') {
 113                                         name = $.quoteString(k);
 114                                 } else {
 115                                         // Keys must be numerical or string. Skip others
 116                                         continue;
 117                                 }
 118                                 type = typeof o[k];
 119
 120                                 if ( type === 'function' || type === 'undefined' ) {
 121                                         // Invalid values like these return undefined
 122                                         // from toJSON, however those object members
 123                                         // shouldn't be included in the JSON string at all.
 124                                         continue;
 125                                 }
 126                                 val = $.toJSON( o[k] );
 127                                 pairs.push( name + ':' + val );
 128                         }
 129                         return '{' + pairs.join( ',' ) + '}';
 130                 }
 131         };
 132
 133         /**
 134          * jQuery.evalJSON
 135          * Evaluates a given piece of json source.
 136          *
 137          * @param src {String}
 138          */
 139         $.evalJSON = typeof JSON === 'object' && JSON.parse
 140                         ? JSON.parse
 141                         : function( src ) {
 142                 return eval('(' + src + ')');
 143         };
 144
 145         /**
 146          * jQuery.secureEvalJSON
 147          * Evals JSON in a way that is *more* secure.
 148          *
 149          * @param src {String}
 150          */
 151         $.secureEvalJSON = typeof JSON === 'object' && JSON.parse
 152                         ? JSON.parse
 153                         : function( src ) {
 154
 155                 var filtered =
 156                                 src
 157                                                 .replace( /\\["\\\/bfnrtu]/g, '@' )
 158                                                 .replace( /"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
 159                                                 .replace( /(?:^|:|,)(?:\s*\[)+/g, '');
 160
 161                 if ( /^[\],:{}\s]*$/.test( filtered ) ) {
 162                         return eval( '(' + src + ')' );
 163                 } else {
 164                         throw new SyntaxError( 'Error parsing JSON, source is not valid.' );
 165                 }
 166         };
 167
 168         /**
 169          * jQuery.quoteString
 170          * Returns a string-repr of a string, escaping quotes intelligently.
 171          * Mostly a support function for toJSON.
 172          * Examples:
 173          * >>> jQuery.quoteString('apple')
 174          * "apple"
 175          *
 176          * >>> jQuery.quoteString('"Where are we going?", she asked.')
 177          * "\"Where are we going?\", she asked."
 178          */
 179         $.quoteString = function( string ) {
 180                 if ( string.match( escapeable ) ) {
 181                         return '"' + string.replace( escapeable, function( a ) {
 182                                 var c = meta[a];
 183                                 if ( typeof c === 'string' ) {
 184                                         return c;
 185                                 }
 186                                 c = a.charCodeAt();
 187                                 return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
 188                         }) + '"';
 189                 }
 190                 return '"' + string + '"';
 191         };
 192
 193 })( jQuery );