ln.http/ln.http.service/Program.cs

using System.IO;
using System.Reflection;
using System.Threading;
using ln.bootstrap;
using ln.http.router;
using ln.templates.html;

namespace ln.http.service
{
    class Program
    {
        static void Main(string[] args)
        {
            Bootstrap
                .DefaultInstance
                .ServiceContainer.RegisterService<HttpServiceHelper>();
            Bootstrap
                .DefaultInstance
                .Start();
        }

    }

    class HttpServiceHelper : HttpRouter
    {
        private TemplateDocument _templateDocument;
        public HttpServiceHelper(HttpServer httpServer)
        :base(httpServer)
        {
            using (StreamReader reader = new StreamReader(
                       Assembly
                           .GetExecutingAssembly()
                           .GetManifestResourceStream("ln.http.service.error.html")
                       )
                   )
            {
                _templateDocument = TemplateReader.ReadTemplate(reader);
            }
            
            Map(HttpMethod.ANY, "/_err.html", HttpRoutePriority.LOW, this.HttpError);
        }

        bool HttpError(HttpContext httpContext)
        {
            HttpResponse httpResponse =
                new HttpResponse(httpContext.HttpException?.HttpStatusCode ?? HttpStatusCode.InternalServerError);

            RenderContext renderContext = new RenderContext(httpResponse.ContentWriter);
            renderContext
                .GetEngine()
                .SetValue("httpContext", httpContext);
            
            _templateDocument.RenderTemplate(renderContext);
            httpContext.Response = httpResponse;
            return true;
        }
        
    }
}