source: Dev/trunk/node_modules/grunt-curl/test/expected/cookiejar.js

/**
 * Javascript code to store data as JSON strings in cookies. 
 * It uses prototype.js 1.5.1 (http://www.prototypejs.org)
 * 
 * Author : Lalit Patel
 * Website: http://www.lalit.org/lab/jsoncookies
 * License: Apache Software License 2
 *          http://www.apache.org/licenses/LICENSE-2.0
 * Version: 0.5
 * Updated: Jan 26, 2009 
 * 
 * Chnage Log:
 *   v 0.5
 *   -  Changed License from CC to Apache 2
 *   v 0.4
 *   -  Removed a extra comma in options (was breaking in IE and Opera). (Thanks Jason)
 *   -  Removed the parameter name from the initialize function
 *   -  Changed the way expires date was being calculated. (Thanks David)
 *   v 0.3
 *   -  Removed dependancy on json.js (http://www.json.org/json.js)
 *   -  empty() function only deletes the cookies set by CookieJar
 */

var CookieJar = Class.create();

CookieJar.prototype = {

        /**
         * Append before all cookie names to differntiate them.
         */
        appendString: "__CJ_",

        /**
         * Initializes the cookie jar with the options.
         */
        initialize: function(options) {
                this.options = {
                        expires: 3600,          // seconds (1 hr)
                        path: '',                       // cookie path
                        domain: '',                     // cookie domain
                        secure: ''                      // secure ?
                };
                Object.extend(this.options, options || {});

                if (this.options.expires != '') {
                        var date = new Date();
                        date = new Date(date.getTime() + (this.options.expires * 1000));
                        this.options.expires = '; expires=' + date.toGMTString();
                }
                if (this.options.path != '') {
                        this.options.path = '; path=' + escape(this.options.path);
                }
                if (this.options.domain != '') {
                        this.options.domain = '; domain=' + escape(this.options.domain);
                }
                if (this.options.secure == 'secure') {
                        this.options.secure = '; secure';
                } else {
                        this.options.secure = '';
                }
        },

        /**
         * Adds a name values pair.
         */
        put: function(name, value) {
                name = this.appendString + name;
                cookie = this.options;
                var type = typeof value;
                switch(type) {
                  case 'undefined':
                  case 'function' :
                  case 'unknown'  : return false;
                  case 'boolean'  : 
                  case 'string'   : 
                  case 'number'   : value = String(value.toString());
                }
                var cookie_str = name + "=" + escape(Object.toJSON(value));
                try {
                        document.cookie = cookie_str + cookie.expires + cookie.path + cookie.domain + cookie.secure;
                } catch (e) {
                        return false;
                }
                return true;
        },

        /**
         * Removes a particular cookie (name value pair) form the Cookie Jar.
         */
        remove: function(name) {
                name = this.appendString + name;
                cookie = this.options;
                try {
                        var date = new Date();
                        date.setTime(date.getTime() - (3600 * 1000));
                        var expires = '; expires=' + date.toGMTString();
                        document.cookie = name + "=" + expires + cookie.path + cookie.domain + cookie.secure;
                } catch (e) {
                        return false;
                }
                return true;
        },

        /**
         * Return a particular cookie by name;
         */
        get: function(name) {
                name = this.appendString + name;
                var cookies = document.cookie.match(name + '=(.*?)(;|$)');
                if (cookies) {
                        return (unescape(cookies[1])).evalJSON();
                } else {
                        return null;
                }
        },

        /**
         * Empties the Cookie Jar. Deletes all the cookies.
         */
        empty: function() {
                keys = this.getKeys();
                size = keys.size();
                for(i=0; i<size; i++) {
                        this.remove(keys[i]);
                }
        },

        /**
         * Returns all cookies as a single object
         */
        getPack: function() {
                pack = {};
                keys = this.getKeys();

                size = keys.size();
                for(i=0; i<size; i++) {
                        pack[keys[i]] = this.get(keys[i]);
                }
                return pack;
        },

        /**
         * Returns all keys.
         */
        getKeys: function() {
                keys = $A();
                keyRe= /[^=; ]+(?=\=)/g;
                str  = document.cookie;
                CJRe = new RegExp("^" + this.appendString);
                while((match = keyRe.exec(str)) != undefined) {
                        if (CJRe.test(match[0].strip())) {
                                keys.push(match[0].strip().gsub("^" + this.appendString,""));
                        }
                }
                return keys;
        }
};