在.Net Core 中使用AuthorizeFilter或者ActionFilterAttribute来实现登录权限验证和授权

一、AuthorizeFilter

新建授权类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"); } } //判断是否不需要权限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,"通过"); }

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

二、ActionFilterAttribute

创建权限判断类继承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 -- 菜单操作权限 }

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（不需要权限）

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

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持。