Program.cs

using Microsoft.AspNetCore.Server.Kestrel.Core; // To use HttpProtocols.
using Northwind.EntityModels; // To use AddNorthwindContext method.

#region Configure the web server host and services

var builder = WebApplication.CreateBuilder(args);

builder.Services.AddRazorPages();
builder.Services.AddNorthwindContext();
builder.Services.AddRequestDecompression();

builder.WebHost.ConfigureKestrel((context, options) =>
{
  options.ConfigureEndpointDefaults(listenOptions =>
  {
    listenOptions.Protocols = HttpProtocols.Http1AndHttp2AndHttp3;
    listenOptions.UseHttps(); // HTTP/3 requires secure connections.
  });
});

var app = builder.Build();

#endregion

#region Configure the HTTP pipeline and routes

if (!app.Environment.IsDevelopment())
{
  app.UseHsts();
}

app.UseRequestDecompression();

// Implementing an anonymous inline delegate as middleware
// to intercept HTTP requests and responses.
app.Use(async (HttpContext context, Func<Task> next) =>
{
  RouteEndpoint? rep = context.GetEndpoint() as RouteEndpoint;

  if (rep is not null)
  {
    WriteLine($"Endpoint name: {rep.DisplayName}");
    WriteLine($"Endpoint route pattern: {rep.RoutePattern.RawText}");
  }

  if (context.Request.Path == "/bonjour")
  {
    // In the case of a match on URL path, this becomes a terminating
    // delegate that returns so does not call the next delegate.
    await context.Response.WriteAsync("Bonjour Monde!");
    return;
  }

  // We could modify the request before calling the next delegate.
  await next();

  // We could modify the response after calling the next delegate.
});

app.UseHttpsRedirection();

app.UseDefaultFiles(); // index.html, default.html, and so on.
app.UseStaticFiles();

app.MapRazorPages();
app.MapGet("/hello", () =>
  $"Environment is {app.Environment.EnvironmentName}");

#endregion

// Start the web server, host the website, and wait for requests.
app.Run(); // This is a thread-blocking call.
WriteLine("This executes after the web server has stopped!");