ServiceStack marker Attribute not found in Collection

Question

I have a custom attribute and I want to check via a GlobalFilter, if the methods I'm calling has this marker attribute. I can't find a way, to get the information that the called method where my request aims to has the Attribute. I've found already another post, which recommends to use FilterAttributeCache.GetRequestFilterAttributes(request.GetType()) but this and also other methods are retuning just no elements.

Could you please help me in what I'm missing here?

Following the example code:

CustomAttribute:

using ServiceStack;
using ServiceStack.Web;

namespace MyProject.Web
{
    public class CustomAttribute : RequestFilterAttribute
    {
        public string ServiceName;
        public string ServiceClass;
        public string ServiceMethod;

        public JwtAuthAttribute(string serviceName, string serviceClass, string serviceMethod)
        {
            ServiceName = serviceName;
            ServiceClass = serviceClass;
            ServiceMethod = serviceMethod;
        }

        public override void Execute(IRequest req, IResponse res, object requestDto)
        {
            //Nothing in here
        }
    }
}

Filter:

using System;
using System.Linq;
using ServiceStack.Support.WebHost;
using ServiceStack.Web;

namespace MyProject.Web
{
    public class CustomFilter
    {
        private readonly ICustomManager _customManager;

        public CustomFilter(ICustomManager customManager)
        {
            _customManager= customManager;
        }

        public void Execute(IRequest request)
        {
            var customHeader = request.Headers.GetValues("CustomHeader");

            if (customHeader == null)
            {
                return;
            }

            var customAttribute = FilterAttributeCache.GetRequestFilterAttributes(request.GetType())
                .OfType<CustomAttribute>().FirstOrDefault();

            if (customAttribute == null)
            {
                return;
            }

            // Do other things here
        }
    }
}

Registration of GlobalFilter in Global.asax:

public override void Configure(Container container)
{
    //other configurations
    
    GlobalRequestFilters.Add((req, res, dto) => req.ResponseContentType = MimeTypes.Json);
    GlobalRequestFilters.Add((req, res, dto) =>
    {
        var customFilter = new CustomFilter(request.TryResolve<ICustomManager>());
        customFilter.Execute(req);
    });
}

Method with marker CustomAttribute:

namespace MyProject.Web
{
    [Authenticate]
    [RequiredRole("CustomUser")]
    public class CustomService : Service
    {
        [Custom("Service", "ServiceClass", "ServiceMethod")]
        public object Get(CustomRequest request)
        {
            //Additional code
        }   
    }
}

Answer 1

After the answer from mythz I was able to fix the issue. I've extented the "Execute" method of "CustomFilter" by requestDto, which was provided by the GobalRequestFilter registration.

Unfortunately I was not able to access the Property "RequestType", maybe because I'm using an older version (ServiceStack 5.9.2, .Net Framework 4.7.2), so I had to go over the MethodParameters.

Here is the final code, which gave me the access to the "CustomAttribute"

var serviceTypeDto = HostContext.AppHost.Metadata.GetServiceTypeByRequest(requestDto.GetType());
var methodInfo = serviceTypeDto.GetDeclaredMethods().FirstOrDefault(x =>
                x.GetParameters().FirstOrDefault(y => y.ParameterType == requestDto.GetType()) != null && x.IsPublic);

var customAttribute = methodInfo.AllAttributes<CustomAttribute>().FirstOrDefault();