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 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