.Net Core 权限验证与受权（AuthorizeFilter、ActionFilterAttribute）

在.Net Core 中使用AuthorizeFilter或者ActionFilterAttribute来实现登陆权限验证和受权

1、AuthorizeFilter

新建受权类AllowAnonymous继承AuthorizeFilter，IAllowAnonymousFilter

public class AllowAnonymous : AuthorizeFilter, IAllowAnonymousFilter { }

 

新建拦截类继承AuthorizeFilter

public class LoginAuthorzation : AuthorizeFilter { }

 

在拦截类里加入处理请求的方法

/// <summary>
        /// 请求验证，当前验证部分不要抛出异常，ExceptionFilter不会处理 /// </summary>
        /// <param name="context">请求内容信息</param>
        public override async Task OnAuthorizationAsync(AuthorizationFilterContext context) { if (IsHaveAllow(context.Filters)) { return; } //解析url // {/ Home / Index}
            var url = context.HttpContext.Request.Path.Value; if (string.IsNullOrWhiteSpace(url)) { return; } var list = url.Split("/"); if (list.Length<=0||url=="/") { return; } var controllerName = list[1].ToString().Trim(); var actionName = list[2].ToString().Trim(); //验证
            var flag=PowerIsTrue.IsHavePower(controllerName, actionName); if (flag.Item1!=0) { context.Result = new RedirectResult("/Home/Index"); } } //判断是否不须要权限

public static bool IsHaveAllow(IList<IFilterMetadata> filers) { for (int i = 0; i < filers.Count; i++) { if (filers[i] is IAllowAnonymousFilter) { return true; } } return false; } 

 

新建一个业务逻辑判断的类

public static (int,string) IsHavePower(string controllerName,string actionName) { return (0,"经过"); }

 

在Startup注册  

services.AddMvc(options => { options.Filters.Add<LoginAuthorzation>(); // 添加身份验证过滤器
 }

 

context.HttpContext.Request.Path.Value   获取请求过来的url

 

2、ActionFilterAttribute

        建立权限判断类继承ActionFilterAttribute

public class ActionFilterAttributeLogin: ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { var isDefined = false; var controllerActionDescriptor = filterContext.ActionDescriptor as ControllerActionDescriptor; if (controllerActionDescriptor != null) { isDefined = controllerActionDescriptor.MethodInfo.GetCustomAttributes(inherit: true) .Any(a => a.GetType().Equals(typeof(NoPermissionRequiredAttribute))); } if (isDefined) return; if (string.IsNullOrWhiteSpace(filterContext.HttpContext.Request.Query["LoginInfo"].ToString())) { var item = new ContentResult(); item.Content = "没得权限"; filterContext.Result = new RedirectResult("/Account/Login"); } base.OnActionExecuting(filterContext); } public class NoPermissionRequiredAttribute : ActionFilterAttribute { public override void OnActionExecuting(ActionExecutingContext filterContext) { base.OnActionExecuting(filterContext); } } }

 

在Startup注册

services.AddMvc(options => { options.Filters.Add<ActionFilterAttributeLogin>(); // 添加身份验证过滤器 -- 菜单操做权限
 }

 

filterContext.ActionDescriptor as ControllerActionDescriptor    获取请求进来的控制器与方法

controllerActionDescriptor.MethodInfo.GetCustomAttributes(inherit: true)

.Any(a => a.GetType().Equals(typeof(NoPermissionRequiredAttribute)))      判断请求的控制器和方法有没有加上NoPermissionRequiredAttribute（不须要权限）

 

string.IsNullOrWhiteSpace(filterContext.HttpContext.Request.Query["LoginInfo"].ToString())     判断请求头是否有标识

 

 

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