net5 Authorize认证及授权自定义自定义返回json格式提示

net自带的权限默认返回的是401和403状态，但是目前大前端时间基本都要求json数据。

net core提供了很多方式实现权限自定义，net5提供了IAuthorizationMiddlewareResultHandler接口来实现这个需求。

services.AddScoped<IAuthorizationMiddlewareResultHandler, CustomAuthorizationMiddleware>();

下面为CustomAuthorizationMiddleware代码，大家可以自行这里自定义逻辑。

 public class CustomAuthorizationMiddleware : IAuthorizationMiddlewareResultHandler
    {
        public async Task HandleAsync(RequestDelegate next, HttpContext context, AuthorizationPolicy policy, PolicyAuthorizationResult authorizeResult)
        {
            var endPoint = context.GetEndpoint();

            var controllerActionDescriptor = (ControllerActionDescriptor)endPoint.Metadata
              .ToList().FirstOrDefault(d => d is ControllerActionDescriptor);
            var controllerName = controllerActionDescriptor.ControllerName;
            var actionName = controllerActionDescriptor.ActionName;

            ResponseData responseData = new ResponseData()
            {
                Status = 0
            };
            if (!context.User.Identity.IsAuthenticated)
            {
                //await next(context);
                context.Response.StatusCode = StatusCodes.Status401Unauthorized;
                responseData.Code= StatusCodes.Status401Unauthorized;
                responseData.Msg = "对不起，未登录或登录超时";
                context.Response.ContentType = "application/json;charset=utf-8";
                await context.Response.WriteAsync(JsonHelper.JsonParse(responseData));
                return;
            }
            else if(1==0) //自定义逻辑判断是否有权限,这里省略
            {
                responseData.Code = StatusCodes.Status403Forbidden;
                responseData.Msg = "对不起，您暂无足够的权限执行此操作";
                //context.Response.StatusCode = (int)HttpStatusCode.Forbidden;
                context.Response.ContentType = "application/json;charset=utf-8";
                await context.Response.WriteAsync(JsonHelper.JsonParse(responseData));
                return;
            }
            else
            {
                await next(context);

            }
        
        }
    }