Hi,

In version 8 our third-party web folks implemented this code:

namespace Galbraith.Composers
{
    public class ReapitServiceComposer : IUserComposer
    {
        public void Compose(Composition composition)
        {
            composition.Register<IReapitService, ReapitService>(Lifetime.Singleton);

            ServerVariablesParser.Parsing += ServerVariablesParserOnParsing;
        }

        private void ServerVariablesParserOnParsing(object sender, Dictionary<string, object> e)
        {
            if (HttpContext.Current == null) throw new InvalidOperationException("HttpContext is null.");
            var urlHelper =
                new UrlHelper(new RequestContext(new HttpContextWrapper(HttpContext.Current), new RouteData()));

            var umbracoUrls = (Dictionary<string, object>)e["umbracoUrls"];
            umbracoUrls.Add("reapitImportUrl", urlHelper.GetUmbracoApiServiceBaseUrl<ReapitImportController>(controller => controller.Import(null, false, null, false)));
            e["umbracoUrls"] = umbracoUrls;

        }
    }
}

I've managed to convert bits of it, but I do not understand the logic behind the server variables in Umbraco 13.

I've read into the severvariablesparsingnotification but have no idea if it is what I need and I can't seem to work out how to implement it either.

Any pointers are much appreciated!