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。
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