MVC 5 中Filter控制 action的访问权限

1,创建一个继承自 FilterAttribute, IActionFilter的类

namespace HeatMetering2.Filters
{
    public class HMV2AuthenticationAttribute : FilterAttribute, IActionFilter
    {
        int notAuthentication = 0;  //设置未认证标志,用于区分返回不同的未认证页面

        public void  OnActionExecuted(ActionExecutedContext filterContext)
        {

        }

        public void  OnActionExecuting(ActionExecutingContext filterContext)
        {
            //if (true)
            //{
            //    // 已登录,并且查询数据库后具有操作权限或者设置了Anonymouse,以及当前用户是admin
            //}
            //else
            //{
            //    context.Result = new HttpUnauthorizedResult(); // mark unauthorized
            //}

            notAuthentication = 0;

            if (notAuthentication == 0
                && filterContext.ActionDescriptor.ControllerDescriptor.ControllerName == "basLoginUsers"
                && filterContext.ActionDescriptor.ActionName == "EditBasLoginUser")
            {
                filterContext.Result = new RedirectToRouteResult("Default",
                new System.Web.Routing.RouteValueDictionary{
                   {"controller", "Account"},
                   {"action", "NotAuthentication"},
                   {"returnUrl", filterContext.HttpContext.Request.RawUrl}
                   });
            }


        }

       

    }
}

  2,在controller中这样引用该类

   [HMV2Authentication]
    public class basLoginUsersController : Controller
    {
        private HeatMeteringV2DBContext db = new HeatMeteringV2DBContext("HeatMeteringV2DBContext");

        // GET: basLoginUsers
        public ActionResult Index()
        {
           
            return View();
        }
     public ActionResult EditBasLoginUser(basLoginUser _basLoginUser)
        {
            
            if (ModelState.IsValid)
            {
                try
                {
                    db.Entry(_basLoginUser).State = EntityState.Modified;

                    string _password = _basLoginUser.Password;
                    //随机 "盐",生成自GUID
                    string salt = Guid.NewGuid().ToString();
                    string strPasswordHash = CommFunc.GetPasswordEncryptByHashWithSalt(_password, salt);

                    _basLoginUser.PasswordHash = strPasswordHash;
                    _basLoginUser.PasswordSalt = salt;

                    db.SaveChanges();
                    var json = new
                    {
                        okMsg = "修改成功"
                    };

                    return Json(json, "text/html", JsonRequestBehavior.AllowGet);
                }
                catch(Exception ex)
                {
                    var json = new
                    {
                        errorMsg = "保存数据出错:"+ex.Message.ToString()
                    };

                    return Json(json, "text/html", JsonRequestBehavior.AllowGet);
                }

            }
            else
            {
                var json = new
                {
                    errorMsg = "验证错误"

                };
                return Json(json, "text/html", JsonRequestBehavior.AllowGet);
            }
        }
}

  3,在Account controller中定义如下Action,这样引用basLoginUsersController 的EditBasLoginUser 这个Action都会被提示当前用户没有此项操作权限,

这里仅仅举了个例子,再实际应用中我们可以在我们定义的类的OnActionExecuting方法里面获取我们已经设定好的对controller->action的权限设定,来决定是否禁用该Action,以达到设定权限的目的。但是这样做的不好之处是,用户仍然可以执行操作,只是我们在用户操作以后才可以告诉用户啥啥不能用种种,有点不好。

目前想到的方法是在页面上用Ajax请求权限数据,利用Javascript(Jquery)来利用元素ID选择器选择操作元素,并且使元素不可操作/编辑

 [AllowAnonymous]
        public ActionResult NotAuthentication()
        {
            var json = new
            {
                errorMsg = "当前用户没有此项操作权限"
            };

            return Json(json, "text/html", JsonRequestBehavior.AllowGet);
        }

  

posted @ 2016-07-04 17:10  xp1056  阅读(530)  评论(0编辑  收藏  举报