protected override void OnAuthorization(AuthorizationContext filterContext)
        {
            var anonymous = filterContext.ActionDescriptor.GetCustomAttributes(typeof(AnonymousAttribute), false);
            var api = filterContext.ActionDescriptor.GetCustomAttributes(typeof(ApiAttribute), false);

            if (anonymous.Length == 1 ) //允许匿名访问
            {

            }
            else if (api.Length == 1)
            {
                PassportEngine pe = new PassportEngine();
                LoginIdentity ui = pe.CreateIdentity(System.Web.HttpContext.Current);
                string sid = System.Web.HttpContext.Current.Request.Headers["sid"];

                if (ui.UserID > 0)
                {
                    ViewData["User"] = ui;
                }
                else if (!string.IsNullOrEmpty(sid))
                {
                    ViewData["User"] = new LoginIdentity(Convert.ToInt32(sid),string.Empty,sid);
                }
                else
                {
                    ViewData["User"] = new LoginIdentity();
                }
            }
            else
            {
                PassportEngine pe = new PassportEngine();
                LoginIdentity ui = pe.CreateIdentity(System.Web.HttpContext.Current);

                if (ui.UserID <= 0)
                {
                    filterContext.Result = new RedirectResult(ConfigurationManager.AppSettings["LoginUrl"]);
                }

                ViewData["User"] = ui;
            }

            ViewData["iPhone"] = false;

            if (System.Web.HttpContext.Current.Request.Headers["platform"] != null && System.Web.HttpContext.Current.Request.Headers["platform"].ToLower() == "iphone")
            {
                ViewData["iPhone"] = true;
            }

            base.OnAuthorization(filterContext);
        }
        public LoginIdentity CreateIdentity(HttpContext context)
        {
            HttpCookie cookie = context.Request.Cookies[CookieName];
            if (cookie == null) return LoginIdentity.Anonymous;
            else
            {
                // 刷新Cookie过期时间
                if (ExpireTime > 0)
                {
                    long ticks = Convert.ToInt64(cookie.Values["expiry"]);
                    DateTime expiry = new DateTime(ticks);
                    if (expiry <= DateTime.Now) return LoginIdentity.Anonymous;
                    //else
                    //{
                    //    cookie.Values["expiry"] = DateTime.Now.AddMinutes(ExpireTime).Ticks.ToString();
                    //    context.Response.Cookies.Add(cookie);
                    //}
                    else
                    {
                        if (isRemember)
                        {
                            cookie.Values["expiry"] = DateTime.Now.AddDays(ExpireTime).Ticks.ToString();
                            cookie.Expires = DateTime.Now.AddDays(ExpireTime);
                            context.Response.Cookies.Add(cookie);
                        }
                        else
                        {
                            cookie.Values["expiry"] = DateTime.Now.AddMinutes(ExpireTime).Ticks.ToString();
                            cookie.Expires = DateTime.Now.AddHours(ExpireTime);
                            context.Response.Cookies.Add(cookie);
                        }

                    }
                }

                string id = cookie.Values["id"];
                string name = DecodeCookieValue(cookie.Values["name"]);
                bool remember = Convert.ToBoolean(cookie.Values["remember"]);

                if (Encrypt)
                {
                    id = EncryptHelper.AESDecrypt(id);
                    name = EncryptHelper.AESDecrypt(name);
                }

                LoginIdentity identity = new LoginIdentity(Convert.ToInt32(id), name);
                return identity;
            }
        }