ASP.MVC 基于AuthorizeAttribute权限设计案例

用户1055830

发布于 2018-01-18 15:46:00

1.5K0

发布于 2018-01-18 15:46:00

ASP.MVC上实现权限控制的方法很多，比如使用AuthorizeAttribute这个特性

1.创建自定义特性用于权限验证

 public class AuthorizeDiy : AuthorizeAttribute
    {
        /// <summary>
        /// 提供一个入口用于自定义授权检查
        /// </summary>
        /// <param name="httpContext"></param>
        /// <returns></returns>
        protected override bool AuthorizeCore(HttpContextBase httpContext)
        {
            bool pass = false;
            HttpCookie cookie = HttpContext.Current.Request.Cookies["admin"];
            if (cookie == null || cookie.Value == null)
            {
                httpContext.Response.StatusCode = 401;
                pass = false;
            }
            else
            {
                pass = true;
            }
            return pass;
        }    

        /// <summary>
        /// 处理未能授权的Http请求
        /// </summary>
        /// <param name="filterContext"></param>
        protected override void HandleUnauthorizedRequest(AuthorizationContext filterContext)
        {
            base.HandleUnauthorizedRequest(filterContext);
            filterContext.HttpContext.Response.Write(filterContext.HttpContext.Response.StatusCode);
            if (filterContext.HttpContext.Response.StatusCode == 401)
            {
                //跳转到登录界面
                filterContext.Result = new RedirectResult("/Login");
            }
        }     
    }

重写2个方法用于验证处理授权请求和授权失败。

2.创建控制器基类便于其他控制器继承

   [AuthorizeDiy]
    public class BaseAdminController:Controller
    {
    }

注意使用自定义特性

3.登录控制器的写法

    /// <summary>
    /// 登录控制器
    /// </summary>
    public class LoginController : BaseAdminController
    {
        //
        // GET: /Login/
        [AllowAnonymous]
        public ActionResult Index()
        {
            return View();
        }

        [HttpPost]
        [AllowAnonymous]
        public JsonResult LoginCheck()
        {
            FormsAuthenticationTicket ticket = new FormsAuthenticationTicket(
                      1,
                      "admin",
                      DateTime.Now,
                      DateTime.Now.AddDays(1),
                      true,
                      Newtonsoft.Json.JsonConvert.SerializeObject(new {name="test"}));

            string ticString = FormsAuthentication.Encrypt(ticket);

            HttpCookie cookie = new HttpCookie("admin", ticString);
            Response.Cookies.Add(cookie);
            object result = new { success = true };
            return this.Json(result);
        }
    }

注意：继承基类，并且使用MVC自定义特性进行授权此处只是简单实现。注意：跳转登录和验证登录的2个action必须使用Allowanonymous特性否则登录界面的权限验证无法通过会出现重复定向多次的错误

4.其他页面的Demo

登录视图：

@{
    ViewBag.Title = "Index";
}
<script src="~/Scripts/jquery-1.8.2.min.js"></script>
<h2>这个是登录界面</h2>
<form class="formClass">
    <button>登录</button>
</form>

<script>
    $(function ()
    {
        $(".formClass").submit(function ()
        {
            $.post("/Login/LoginCheck", {}, function (r) {
                alert(JSON.stringify(r));
                if (r) {
                    location.href = "/Home/Index";
                }
                else {
                    alert("登录失败");
                }
            });
            return false;
        })
    })
</script>

主视图：

@{
    ViewBag.Title = "Index";
  
}

<script src="~/Scripts/jquery-1.8.2.min.js"></script>
<h2>Index</h2>
<script>
    $(function ()
    {
      
    })
</script>

主页控制器：

  public class HomeController : BaseAdminController
    {
        //
        // GET: /Home/

        public ActionResult Index()
        {
            return View();
        }

    }