netcore 下的policy授权自定义返回结果

目前一直在用policy做权限校验，但是好像组里需要将返回结果统一，之前用的都是直接继承AuthorizationHandler然后调用context.Fail()，但是这样会导致没办法自定义返回结果比如{code:403,msg:'未授权',data:null},

也百度了下https://q.cnblogs.com/q/120091/ 这里也说了3.0后就改掉了之前可以通过result来返回，但是现在不行了，之后又查了下资料无果，今天心血来潮直接用httpcontext来返回结果可以了。。。。。

直接上代码吧

    public class ApiUrlPermissionHandler : AuthorizationHandler<ApiUrlPermissionRequirement>
    {
        private readonly IHttpContextAccessor _accessor;
        private readonly ILogger<ApiUrlPermissionHandler> _logger;
        private readonly IPermissionWatchDog _permissionWatchDog;

        public ApiUrlPermissionHandler(IHttpContextAccessor accessor,ILogger<ApiUrlPermissionHandler> logger, IPermissionWatchDog permissionWatchDog)
        {
            this._accessor = accessor;
            this._logger = logger;
            this._permissionWatchDog = permissionWatchDog;
        }
        protected override async Task HandleRequirementAsync(AuthorizationHandlerContext context, ApiUrlPermissionRequirement requirement)
        {
            var httpContext = _accessor.HttpContext;

            var isAuthenticated = context.User.Identity.IsAuthenticated;
            if (isAuthenticated)
            {
                var uid = httpContext.User.Claims.FirstOrDefault(s => s.Type == "uid")?.Value;
                if (uid.IsNullOrWhiteSpace())
                {
                    context.Fail();
                    return;
                }
                //判断是否有权限
                var questUrl = httpContext.Request.Path.Value.ToLower();
                if (!await _permissionWatchDog.PassApiPermAsync(uid, questUrl))
                {
                    context.Fail();
                    return;
                }
                context.Succeed(requirement);
            }
            else
            {
                httpContext.Response.ContentType =  "application/json; charset=UTF-8";
                await httpContext.Response.WriteAsync(JsonConvert.SerializeObject(new { a="123",b="435"}));
                await httpContext.Response.Body.FlushAsync();
                //context.Fail();
            }
        }
    }

　　有不对或者更好的方法希望园友提供指出谢谢