startup asp.net core with agility

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.HttpsPolicy;
using Microsoft.AspNetCore.Mvc;
using Microsoft.AspNetCore.SpaServices.Webpack;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.DependencyInjection;
using System.Reflection;
using Agility.Web;
using Website.Helpers;
using Microsoft.Extensions.DependencyInjection.Extensions;
using Microsoft.Net.Http.Headers;

namespace Website
{
    public class Startup
    {
        public Startup(IConfiguration configuration)
        {
            Configuration = configuration;
        }

        public IConfiguration Configuration { get; }

        // This method gets called by the runtime. Use this method to add services to the container.
        public void ConfigureServices(IServiceCollection services)
        {

            services.TryAddSingleton<IHttpContextAccessor, HttpContextAccessor>();
            var assembly = typeof(Startup).GetTypeInfo().Assembly;

            services.AddMvc()
                .AddApplicationPart(assembly)
                .AddControllersAsServices();

            AgilityContext.ConfigureServices(services, Configuration);
        }

        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
        {
            if (env.IsDevelopment())
            {
                app.UseDeveloperExceptionPage();
                app.UseBrowserLink();
            }
            else
            {
                app.UseExceptionHandler("/Home/Error");
            }


            app.UseStaticFiles(new StaticFileOptions()
            {
                ServeUnknownFileTypes = true,
                OnPrepareResponse = context =>
                {
                    context.Context.Response.Headers["Strict-Transport-Security"] = "max-age=31536000; includeSubDomains";
                    context.Context.Response.Headers["X-Frame-Options"] = "SAMEORIGIN";
                    context.Context.Response.Headers["X-XSS-Protection"] = "1; mode=block";
                    context.Context.Response.Headers["X-Permitted-Cross-Domain-Policies"] = "none";
                    context.Context.Response.Headers[HeaderNames.CacheControl] = "public, max-age=1296000,max-age=31536000, must-revalidate";
                }
            });


            app.Use(async (context, next) =>
            {
                context.Response.Headers["Strict-Transport-Security"] = "max-age=31536000; includeSubDomains";
                context.Response.Headers["X-Frame-Options"] = "SAMEORIGIN";
                context.Response.Headers["X-XSS-Protection"] = "1; mode=block";
                context.Response.Headers["X-Permitted-Cross-Domain-Policies"] = "none";

                await next();

                if (context.Response.StatusCode == 404 && !context.Response.HasStarted)
                {
                    //Re-execute the request so the user gets the error page
                    string originalPath = context.Request.Path.Value;
                    context.Items["originalPath"] = originalPath;
                    context.Request.Path = "/page-not-found";
                    await next();
                }

            });

            app.UseMvc(routes =>
            {
                //Agility Builtin Route
                routes.MapRoute("Agility", "{*sitemapPath}", new { controller = "Agility", action = "RenderPage" },
                    new { isAgilityPath = new Agility.Web.Mvc.AgilityRouteConstraint() });

                routes.MapRoute(
                    name: "default",
                    template: "{controller=Home}/{action=Index}/{id?}");
            });

            app.MapWhen(context => context.Request.Path.Value.EndsWith("sitemap.xml", true, null), appBranch =>
            {
                appBranch.UseSitemapHandler();
            });

            app.MapWhen(context => context.Request.Path.Value.EndsWith("robots.txt", true, null), appBranch =>
            {
                appBranch.UseCustomPageHandler();
            });

            //configure the Agility Context
            AgilityContext.Configure(app, env, useResponseCaching: true);
        }
    }
}