resources/jquery/jquery.json.js

   1 /**
   2  * jQuery JSON plugin 2.4.0
   3  *
   4  * @author Brantley Harris, 2009-2011
   5  * @author Timo Tijhof, 2011-2012
   6  * @source This plugin is heavily influenced by MochiKit's serializeJSON, which is
   7  *         copyrighted 2005 by Bob Ippolito.
   8  * @source 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  * @license MIT License <http://www.opensource.org/licenses/mit-license.php>
  13  */
  14 (function ($) {
  15         'use strict';
  16
  17         var escape = /["\\\x00-\x1f\x7f-\x9f]/g,
  18                 meta = {
  19                         '\b': '\\b',
  20                         '\t': '\\t',
  21                         '\n': '\\n',
  22                         '\f': '\\f',
  23                         '\r': '\\r',
  24                         '"' : '\\"',
  25                         '\\': '\\\\'
  26                 },
  27                 hasOwn = Object.prototype.hasOwnProperty;
  28
  29         /**
  30          * jQuery.toJSON
  31          * Converts the given argument into a JSON representation.
  32          *
  33          * @param o {Mixed} The json-serializable *thing* to be converted
  34          *
  35          * If an object has a toJSON prototype, that will be used to get the representation.
  36          * Non-integer/string keys are skipped in the object, as are keys that point to a
  37          * function.
  38          *
  39          */
  40         $.toJSON = typeof JSON === 'object' && JSON.stringify ? JSON.stringify : function (o) {
  41                 if (o === null) {
  42                         return 'null';
  43                 }
  44
  45                 var pairs, k, name, val,
  46                         type = $.type(o);
  47
  48                 if (type === 'undefined') {
  49                         return undefined;
  50                 }
  51
  52                 // Also covers instantiated Number and Boolean objects,
  53                 // which are typeof 'object' but thanks to $.type, we
  54                 // catch them here. I don't know whether it is right
  55                 // or wrong that instantiated primitives are not
  56                 // exported to JSON as an {"object":..}.
  57                 // We choose this path because that's what the browsers did.
  58                 if (type === 'number' || type === 'boolean') {
  59                         return String(o);
  60                 }
  61                 if (type === 'string') {
  62                         return $.quoteString(o);
  63                 }
  64                 if (typeof o.toJSON === 'function') {
  65                         return $.toJSON(o.toJSON());
  66                 }
  67                 if (type === 'date') {
  68                         var month = o.getUTCMonth() + 1,
  69                                 day = o.getUTCDate(),
  70                                 year = o.getUTCFullYear(),
  71                                 hours = o.getUTCHours(),
  72                                 minutes = o.getUTCMinutes(),
  73                                 seconds = o.getUTCSeconds(),
  74                                 milli = o.getUTCMilliseconds();
  75
  76                         if (month < 10) {
  77                                 month = '0' + month;
  78                         }
  79                         if (day < 10) {
  80                                 day = '0' + day;
  81                         }
  82                         if (hours < 10) {
  83                                 hours = '0' + hours;
  84                         }
  85                         if (minutes < 10) {
  86                                 minutes = '0' + minutes;
  87                         }
  88                         if (seconds < 10) {
  89                                 seconds = '0' + seconds;
  90                         }
  91                         if (milli < 100) {
  92                                 milli = '0' + milli;
  93                         }
  94                         if (milli < 10) {
  95                                 milli = '0' + milli;
  96                         }
  97                         return '"' + year + '-' + month + '-' + day + 'T' +
  98                                 hours + ':' + minutes + ':' + seconds +
  99                                 '.' + milli + 'Z"';
 100                 }
 101
 102                 pairs = [];
 103
 104                 if ($.isArray(o)) {
 105                         for (k = 0; k < o.length; k++) {
 106                                 pairs.push($.toJSON(o[k]) || 'null');
 107                         }
 108                         return '[' + pairs.join(',') + ']';
 109                 }
 110
 111                 // Any other object (plain object, RegExp, ..)
 112                 // Need to do typeof instead of $.type, because we also
 113                 // want to catch non-plain objects.
 114                 if (typeof o === 'object') {
 115                         for (k in o) {
 116                                 // Only include own properties,
 117                                 // Filter out inherited prototypes
 118                                 if (hasOwn.call(o, k)) {
 119                                         // Keys must be numerical or string. Skip others
 120                                         type = typeof k;
 121                                         if (type === 'number') {
 122                                                 name = '"' + k + '"';
 123                                         } else if (type === 'string') {
 124                                                 name = $.quoteString(k);
 125                                         } else {
 126                                                 continue;
 127                                         }
 128                                         type = typeof o[k];
 129
 130                                         // Invalid values like these return undefined
 131                                         // from toJSON, however those object members
 132                                         // shouldn't be included in the JSON string at all.
 133                                         if (type !== 'function' && type !== 'undefined') {
 134                                                 val = $.toJSON(o[k]);
 135                                                 pairs.push(name + ':' + val);
 136                                         }
 137                                 }
 138                         }
 139                         return '{' + pairs.join(',') + '}';
 140                 }
 141         };
 142
 143         /**
 144          * jQuery.evalJSON
 145          * Evaluates a given json string.
 146          *
 147          * @param str {String}
 148          */
 149         $.evalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse : function (str) {
 150                 /*jshint evil: true */
 151                 return eval('(' + str + ')');
 152         };
 153
 154         /**
 155          * jQuery.secureEvalJSON
 156          * Evals JSON in a way that is *more* secure.
 157          *
 158          * @param str {String}
 159          */
 160         $.secureEvalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse : function (str) {
 161                 var filtered =
 162                         str
 163                         .replace(/\\["\\\/bfnrtu]/g, '@')
 164                         .replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
 165                         .replace(/(?:^|:|,)(?:\s*\[)+/g, '');
 166
 167                 if (/^[\],:{}\s]*$/.test(filtered)) {
 168                         /*jshint evil: true */
 169                         return eval('(' + str + ')');
 170                 }
 171                 throw new SyntaxError('Error parsing JSON, source is not valid.');
 172         };
 173
 174         /**
 175          * jQuery.quoteString
 176          * Returns a string-repr of a string, escaping quotes intelligently.
 177          * Mostly a support function for toJSON.
 178          * Examples:
 179          * >>> jQuery.quoteString('apple')
 180          * "apple"
 181          *
 182          * >>> jQuery.quoteString('"Where are we going?", she asked.')
 183          * "\"Where are we going?\", she asked."
 184          */
 185         $.quoteString = function (str) {
 186                 if (str.match(escape)) {
 187                         return '"' + str.replace(escape, function (a) {
 188                                 var c = meta[a];
 189                                 if (typeof c === 'string') {
 190                                         return c;
 191                                 }
 192                                 c = a.charCodeAt();
 193                                 return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
 194                         }) + '"';
 195                 }
 196                 return '"' + str + '"';
 197         };
 198
 199 }(jQuery));