asp.net Cookie跨域、虛擬目錄等設置方法

Cookie有三個屬性需要注意一下：
. Domain 域
. Path 路徑
. Expires 過期時間

跨域操作需要設置域屬性:
Response.Cookies("MyCookie").Domain = "jb51.net"; (這裏指的是泛域名)
這樣在其它二級域名下就都可以訪問到了， ASP 和 ASP.NET 測試通過

虛擬目錄下訪問：
我在ASP端做了下測試，.NET的沒試, 如果不指定Path屬性， 不同虛擬目錄下Cookie無法共享
將Response.Cookies("MyCookie").Path = "/" 就可以了

總的寫法:

複製代碼 代碼如下:

Response.Cookies("MyCookie").Domain = "jb51.net";
Response.Cookies("MyCookie").Path = "/"
Response.Cookies("MyCookie").Expires = Now + 365;
Response.Cookies("MyCookie")("Test") = "test";

.NET 清除Cookie

複製代碼 代碼如下:

   public void DeleteCookie(string cookiename, string _domain, string _cookiepath)
        {
            HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookiename];
            if (cookie != null)
            {
                cookie.Values.Clear();
                SetUserCookieExpireTime(cookiename, -1,,  _domain,  _cookiepath);
                cookie.Domain = _domain;
                System.Web.HttpContext.Current.Response.Cookies.Set(cookie);
            }
        }
        public static void SetUserCookieExpireTime(string key, int days, string _domain, string _cookiepath)
        {
            System.Web.HttpContext.Current.Response.Cookies[key].Domain = _domain;
            System.Web.HttpContext.Current.Response.Cookies[key].Path = _cookiepath;
            System.Web.HttpContext.Current.Response.Cookies[key].Expires = DateTime.Now.AddDays(days);
        }

.NET 添加/更新Cookie

複製代碼 代碼如下:

  public static void AddUserCookies(string key, string value, string cookiename, string domain, string _cookiepath)
        {
            HttpCookie cookie = System.Web.HttpContext.Current.Request.Cookies[cookiename];
            if (cookie == null)
            {
                cookie = new HttpCookie(cookiename);
                cookie.Domain = domain;
                cookie.Path = _cookiepath;

                cookie.Values.Add(key, value);
                HttpContext.Current.Response.AppendCookie(cookie);
            }
            else
            {
                if (System.Web.HttpContext.Current.Request.Cookies[cookiename].Values[key] != null)
                {
                    cookie.Values.Set(key, value);
                }
                else
                {
                    cookie.Domain = domain;
                    cookie.Path = _cookiepath;

                    cookie.Values.Add(key, value);
                    HttpContext.Current.Response.AppendCookie(cookie);
                }
            }
        }

身份驗證Cookie域,什麼意思?

默認情況下，Cookie 與特定的域相關聯。例如，如果您的站點是 www.jb51.net，那麼當用戶向該站點請求頁面時，您編寫的 Cookie 就被髮送到服務器。（有特定路徑值的 Cookie 除外。） 如果您的站點有子域（例如 jb51.net、s.jb51.net 和 tools.jb51.net），就可以把 Cookie 同特定的子域相關聯。爲此，需要設置 Cookie 的 Domain 屬性，如下所示：

複製代碼 代碼如下:

Response.Cookies("domain").Value = DateTime.Now.ToString
Response.Cookies("domain").Expires = DateTime.Now.AddDays(1)
Response.Cookies("domain").Domain = "s.jb51.net"

如果按照這種方式設置域，則 Cookie 只能用於指定子域中的頁面。

您也可以利用 Domain 屬性來創建可在多個子域中共享的 Cookie。例如，對域進行如下設置：

複製代碼 代碼如下:

Response.Cookies("domain").Value = DateTime.Now.ToString
Response.Cookies("domain").Expires = DateTime.Now.AddDays(1)
Response.Cookies("domain").Domain = "jb51.net"

這樣，該 Cookie 就可用於主域、s.jb51.net 和 tools.jb51.net。

 

  //讀取 Cookie 集合
            for (int i = 0; i < Request.Cookies.Count; i++)
            {
                HttpCookie cookies = Request.Cookies[i];
                Response.Write("name=" + cookies.Name + "<br/>");
                if (cookies.HasKeys)//是否有子鍵
                {
                    System.Collections.Specialized.NameValueCollection NameColl
                                                         = cookies.Values;
                    for (int j = 0; j < NameColl.Count; j++)
                    {
                        Response.Write("子鍵名=" + NameColl.AllKeys[j] + "<br/>");
                        Response.Write("子鍵值=" + NameColl[j] + "<br/>");
                    }

                }
                else
                {
                    Response.Write("value=" + cookies.Value + "<br/>");
                }
            }