gistfile1.cs

    public class SessionPostAttribute : RequestFilterAttribute
    {
        public SessionPostAttribute()
        {
            this.Priority = -200;
            this.ApplyTo = ApplyTo.Post;
        }

        public override void Execute(IHttpRequest req, IHttpResponse res, object requestDto)
        {
            var ssId = req.FormData.Get("ServiceStackId");
            var ssPid = req.FormData.Get("ServiceStackPid");

            if ((ssId != null) && (ssPid != null))
            {
                req.Cookies["ss-id"] = new System.Net.Cookie("ss-id", ssId);
                req.Cookies["ss-pid"] = new System.Net.Cookie("ss-pid", ssPid);
            }
        }
    }


    [SessionPost, RequiredRole("admin")]
    public class BlahService : IService<Blah>, IRequiresRequestContext
    {
        public IRequestContext RequestContext { get; set; }

        public object Execute(Blah request)
        {
            Console.WriteLine("Made it through auth");
            return null;
        }
    }