200 lines
8.2 KiB
JavaScript
200 lines
8.2 KiB
JavaScript
/**
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* jQuery JSON plugin 2.4.0
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*
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* @author Brantley Harris, 2009-2011
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* @author Timo Tijhof, 2011-2012
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* @source This plugin is heavily influenced by MochiKit's serializeJSON, which is
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* copyrighted 2005 by Bob Ippolito.
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* @source Brantley Harris wrote this plugin. It is based somewhat on the JSON.org
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* website's http://www.json.org/json2.js, which proclaims:
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* "NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.", a sentiment that
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* I uphold.
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* @license MIT License <http://www.opensource.org/licenses/mit-license.php>
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*/
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(function ($) {
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'use strict';
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var escape = /["\\\x00-\x1f\x7f-\x9f]/g,
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meta = {
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'\b': '\\b',
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'\t': '\\t',
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'\n': '\\n',
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'\f': '\\f',
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'\r': '\\r',
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'"' : '\\"',
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'\\': '\\\\'
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},
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hasOwn = Object.prototype.hasOwnProperty;
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/**
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* jQuery.toJSON
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* Converts the given argument into a JSON representation.
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*
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* @param o {Mixed} The json-serializable *thing* to be converted
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*
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* If an object has a toJSON prototype, that will be used to get the representation.
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* Non-integer/string keys are skipped in the object, as are keys that point to a
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* function.
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*
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*/
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$.toJSON = typeof JSON === 'object' && JSON.stringify ? JSON.stringify : function (o) {
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if (o === null) {
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return 'null';
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}
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var pairs, k, name, val,
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type = $.type(o);
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if (type === 'undefined') {
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return undefined;
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}
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// Also covers instantiated Number and Boolean objects,
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// which are typeof 'object' but thanks to $.type, we
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// catch them here. I don't know whether it is right
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// or wrong that instantiated primitives are not
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// exported to JSON as an {"object":..}.
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// We choose this path because that's what the browsers did.
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if (type === 'number' || type === 'boolean') {
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return String(o);
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}
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if (type === 'string') {
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return $.quoteString(o);
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}
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if (typeof o.toJSON === 'function') {
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return $.toJSON(o.toJSON());
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}
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if (type === 'date') {
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var month = o.getUTCMonth() + 1,
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day = o.getUTCDate(),
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year = o.getUTCFullYear(),
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hours = o.getUTCHours(),
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minutes = o.getUTCMinutes(),
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seconds = o.getUTCSeconds(),
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milli = o.getUTCMilliseconds();
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if (month < 10) {
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month = '0' + month;
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}
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if (day < 10) {
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day = '0' + day;
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}
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if (hours < 10) {
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hours = '0' + hours;
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}
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if (minutes < 10) {
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minutes = '0' + minutes;
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}
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if (seconds < 10) {
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seconds = '0' + seconds;
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}
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if (milli < 100) {
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milli = '0' + milli;
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}
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if (milli < 10) {
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milli = '0' + milli;
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}
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return '"' + year + '-' + month + '-' + day + 'T' +
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hours + ':' + minutes + ':' + seconds +
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'.' + milli + 'Z"';
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}
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pairs = [];
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if ($.isArray(o)) {
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for (k = 0; k < o.length; k++) {
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pairs.push($.toJSON(o[k]) || 'null');
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}
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return '[' + pairs.join(',') + ']';
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}
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// Any other object (plain object, RegExp, ..)
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// Need to do typeof instead of $.type, because we also
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// want to catch non-plain objects.
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if (typeof o === 'object') {
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for (k in o) {
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// Only include own properties,
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// Filter out inherited prototypes
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if (hasOwn.call(o, k)) {
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// Keys must be numerical or string. Skip others
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type = typeof k;
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if (type === 'number') {
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name = '"' + k + '"';
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} else if (type === 'string') {
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name = $.quoteString(k);
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} else {
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continue;
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}
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type = typeof o[k];
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// Invalid values like these return undefined
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// from toJSON, however those object members
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// shouldn't be included in the JSON string at all.
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if (type !== 'function' && type !== 'undefined') {
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val = $.toJSON(o[k]);
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pairs.push(name + ':' + val);
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}
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}
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}
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return '{' + pairs.join(',') + '}';
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}
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};
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/**
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* jQuery.evalJSON
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* Evaluates a given json string.
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*
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* @param str {String}
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*/
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$.evalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse : function (str) {
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/*jshint evil: true */
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return eval('(' + str + ')');
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};
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/**
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* jQuery.secureEvalJSON
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* Evals JSON in a way that is *more* secure.
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*
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* @param str {String}
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*/
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$.secureEvalJSON = typeof JSON === 'object' && JSON.parse ? JSON.parse : function (str) {
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var filtered =
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str
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.replace(/\\["\\\/bfnrtu]/g, '@')
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.replace(/"[^"\\\n\r]*"|true|false|null|-?\d+(?:\.\d*)?(?:[eE][+\-]?\d+)?/g, ']')
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.replace(/(?:^|:|,)(?:\s*\[)+/g, '');
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if (/^[\],:{}\s]*$/.test(filtered)) {
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/*jshint evil: true */
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return eval('(' + str + ')');
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}
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throw new SyntaxError('Error parsing JSON, source is not valid.');
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};
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/**
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* jQuery.quoteString
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* Returns a string-repr of a string, escaping quotes intelligently.
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* Mostly a support function for toJSON.
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* Examples:
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* >>> jQuery.quoteString('apple')
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* "apple"
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*
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* >>> jQuery.quoteString('"Where are we going?", she asked.')
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* "\"Where are we going?\", she asked."
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*/
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$.quoteString = function (str) {
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if (str.match(escape)) {
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return '"' + str.replace(escape, function (a) {
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var c = meta[a];
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if (typeof c === 'string') {
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return c;
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}
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c = a.charCodeAt();
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return '\\u00' + Math.floor(c / 16).toString(16) + (c % 16).toString(16);
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}) + '"';
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}
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return '"' + str + '"';
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};
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}(jQuery));
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