JS面向对象编程 for Cookie

  1 /*
  2  * Js Class Cookie
  3  * Author:Mr Co    
  4  */
  5  var Cookie = function(/*Cookie名称*/name){
  6 
  7     this.$name = name;
  8     
  9     var allcookies = document.cookie;
 10     
 11     if(allcookies == '') return;
 12     
 13     var cookies = allcookies.split(';');
 14     
 15     var cookie = null;
 16     
 17     for(var i = 0; i < cookies.length; i++){    
 18     
 19         if(cookies[i].substring(0,name.length + 1) == (name + '=')){
 20             
 21             cookie = cookies[i];
 22             
 23             break;
 24             
 25         }    
 26         
 27     }
 28     
 29     if(cookie == null) return;
 30 
 31     var cookieval = cookie.substring(name.length + 1);
 32 
 33     var a = cookieval.split('&');
 34     
 35     for(var i = 0; i < a.length; i++){
 36         
 37         a[i] = a[i].split(':');
 38         
 39     }
 40     
 41     for(var i = 0; i < a.length; i ++){
 42         
 43         this[a[i][0]] = decodeURIComponent(a[i][1]);
 44     
 45     }
 46 }
 47 
 48  /*
 49  * 保存Cookie数据对象
 50  */
 51 Cookie.prototype.store = function(/*过期时间(1表示一天以此类推)*/daysToLive,/*当前Cookie有效地址*/path,/*当前Cookie有效域名访问*/domain,/*安全性*/secure){
 52 
 53     var cookieval = '';
 54     
 55     for(var prop in this){
 56         
 57         if((prop.charAt(0) == '$') || ((typeof this[prop]) == 'function')) continue;
 58         
 59         if(cookieval != '') cookieval += '&';
 60         
 61         cookieval +=  prop + ':' + encodeURIComponent(this[prop]);
 62         
 63     }
 64     
 65     var cookie = this.$name + '=' + cookieval;
 66     
 67     if(daysToLive || daysToLive == 0){
 68         
 69         cookie += '; max-age=' + (daysToLive * 24 *60 *60);
 70         
 71     }
 72     
 73     if(path) cookie += '; path=' + path;
 74     
 75     if(domain) cookie += ';domain=' + domain;
 76     
 77     if(secure) cookie += ';secure';
 78     
 79     document.cookie = cookie;
 80 
 81 }
 82 
 83  /*
 84  * 移除Cookie数据对象指定属性
 85  */
 86 Cookie.prototype.remove = function(/*当前Cookie有效地址*/path,/*当前Cookie有效域名访问*/domain,/*安全性*/secure){
 87 
 88     for(var prop in this){
 89         
 90         if(prop.charAt(0) != '$' && typeof this[prop] != 'function') delete this[prop];
 91         
 92     }
 93 
 94     this.store(0,path,domain,secure);
 95 
 96 }
 97 
 98 /*
 99  * 验证当前客户端浏览器是否支持Cookie
100  */
101 Cookie.IsAllowCookie = function(){
102     
103     if(!navigator.cookieEnabled){
104         
105         alert('温馨提示：\r\n　　您的浏览器当前已禁用页面Cookie！这可能会导致您在\r\n\r\n选择食物数据的时候刷新页面丢失您已选择的食物数据！\r\n\r\n建议您启用浏览器Cookie!');
106 
107     return false;
108         
109     }
110     
111     return true;
112     
113 }

 1 function testFn(){
 2     
 3     var cookie = new Cookie('Test');
 4     
 5     if(!cookie.name || !cookie.color){
 6         
 7         cookie.name = prompt('What is your name:','');
 8         
 9         cookie.color = prompt('What is your favorite color:','');
10         
11     }
12     
13     if(!cookie.visits) cookie.visits = 1;
14     else cookie.visits++;
15     
16     cookie.store(10);
17     
18     alert('color:' + cookie.color + ' name:' + cookie.name + ' visits:' + cookie.visits);
19     
20 }