// IMyScopedService is injected into Invoke
        public async Task Invoke(HttpContext httpContext)
        {
            var           policy = CorsHelper.SetupCors().Build();
            var           origin = httpContext.Request.Headers[CorsConstants.Origin];
            StringBuilder output = new StringBuilder();

            output.AppendLine($"\n-----------\nCORS request at {DateTime.Now} from {httpContext?.Connection?.RemoteIpAddress?.ToString() ?? "unknown IP"}");
            output.AppendLine($"policy origins: {string.Join(",", policy.Origins)}, origin: {origin}, allowed: {policy.IsOriginAllowed(origin)}");
            try
            {
                CorsResult result = _service.EvaluatePolicy(httpContext, policy);
                output.AppendLine(result.ToString());
                output.AppendLine($"is origin allowed: {result.IsOriginAllowed}");

                output.AppendLine($"headers before applying cors: {PrintHeaders(httpContext.Response)}");
                _service.ApplyResult(result, httpContext.Response);
                output.AppendLine($"headers after applying cors: {PrintHeaders(httpContext.Response)}");

                output.AppendLine($"is origin allowed: {result.IsOriginAllowed}");
            }
            catch (Exception e)
            {
                output.AppendLine($"Caught {e.Message}: {e.StackTrace}");
            }
            _logger.LogInformation(output.ToString());
            await _next(httpContext);
        }
        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
        {
            app.UseMiddleware <CorsInspectionMiddleware>();
            app.UseCors(options => CorsHelper.SetupCors(options));

            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
            }

            //app.UseHttpsRedirection();

            app.UseRouting();

            app.UseAuthentication();
            app.UseAuthorization();

            app.UseEndpoints(endpoints => { endpoints.MapControllers(); });
        }