asp.net mvc Ajax服务器跳转

1.过滤器权限验证

 1  [AttributeUsage(AttributeTargets.Method | AttributeTargets.Class, Inherited = true, AllowMultiple = true)]
 2         public class CustomAuthAttribute : ActionFilterAttribute, IAuthorizationFilter
 3         {
 4             public void OnAuthorization(AuthorizationContext filterContext)
 5             {
 6                 if (!filterContext.ActionDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true)
 7                             && !filterContext.ActionDescriptor.ControllerDescriptor.IsDefined(typeof(AllowAnonymousAttribute), true))
 8                 {
 9                     UserInfo user = filterContext.HttpContext.Session["CurentUser"] as UserInfo;
10                     if (user == null || user.Id <= 0)
11                     {
12                         if (filterContext.HttpContext.Request.IsAjaxRequest())
13                         {
14                             filterContext.Result = new HttpStatusCodeResult(499);
15                             filterContext.HttpContext.Response.Write("/Home/Login");
16                             return;
17                         }
18                         else
19                         {
20                             filterContext.Result = new RedirectResult("/Home/Login");
21                             return;
22                         }
23                     }
24                 }
25             }
26         }

2.客户端重写$.Ajax,最好在母版页中加上此代码，统一处理

 1 <script type="text/javascript">
 2     (function ($) {
 3         //备份jquery的ajax方法
 4         var _ajax = $.ajax;
 5         //重写jquery的ajax方法
 6         $.ajax = function (opt) {
 7             //备份opt中error和success方法
 8             var fn = {
 9                 error: function (XMLHttpRequest, textStatus, errorThrown) { },
10             }
11             if (opt.error) {
12                 fn.error = opt.error;
13             }
14             //扩展增强处理
15             var _opt = $.extend(opt, {
16                 error: function (XMLHttpRequest, textStatus, errorThrown) {
17                     //错误方法增强处理
18                     if (XMLHttpRequest.status == "499") {
19                         window.location.href = "/FlexibleBenefit/Login";
20                     }
21                     else
22                     {
23                         fn.error(XMLHttpRequest, textStatus, errorThrown);
24                     }
25                 }
26             });
27             _ajax(_opt);
28         };
29     })(jQuery);
30
31     $.ajaxSetup({
32         statusCode: {
33             499: function (data) {
34                 window.location.href = data.responseText;
35             }
36         }
37     });
38 </script>