Startup.cs

using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Hosting;
using Microsoft.Extensions.Configuration;
using Microsoft.Extensions.Hosting;
using Samples.HelloBlazorServer.Services;
using Stl.Fusion.Blazor;
using Stl.Fusion.Extensions;
using Stl.Fusion.UI;

namespace Samples.HelloBlazorServer;

public class Startup
{
    private IConfiguration Cfg { get; }
    private IWebHostEnvironment Env { get; }
    private ILogger Log { get; set; } = NullLogger<Startup>.Instance;

    public Startup(IConfiguration cfg, IWebHostEnvironment environment)
    {
        Cfg = cfg;
        Env = environment;
    }

    public void ConfigureServices(IServiceCollection services)
    {
        // Logging
        services.AddLogging(logging => {
            logging.ClearProviders();
            logging.AddConsole();
            logging.SetMinimumLevel(LogLevel.Information);
            if (Env.IsDevelopment()) {
                logging.AddFilter("Microsoft", LogLevel.Warning);
                logging.AddFilter("Microsoft.AspNetCore.Hosting", LogLevel.Information);
                logging.AddFilter("Stl.Fusion.Operations", LogLevel.Information);
            }
        });

#pragma warning disable ASP0000
        var tmpServices = services.BuildServiceProvider();
#pragma warning restore ASP0000
        Log = tmpServices.GetRequiredService<ILogger<Startup>>();

        // Fusion services
        var fusion = services.AddFusion();
        fusion.AddBlazor();
        fusion.AddFusionTime(); // IFusionTime is one of built-in compute services you can use
        fusion.AddService<CounterService>();
        fusion.AddService<WeatherForecastService>();
        fusion.AddService<ChatService>();
        fusion.AddService<ChatBotService>();
        // This is just to make sure ChatBotService.StartAsync is called on startup
        services.AddHostedService(c => c.GetRequiredService<ChatBotService>());

        // Default update delay is set to 0.1s
        services.AddTransient<IUpdateDelayer>(c => new UpdateDelayer(c.UIActionTracker(), 0.1));

        // ASP.NET Core / Blazor services
        services.AddRazorPages();
        services.AddServerSideBlazor(o => o.DetailedErrors = true);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment()) {
            app.UseDeveloperExceptionPage();
        }
        else {
            app.UseExceptionHandler("/Error");
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        app.UseHttpsRedirection();
        app.UseStaticFiles();
        app.UseRouting();
        app.UseEndpoints(endpoints =>
        {
            endpoints.MapBlazorHub();
            endpoints.MapFallbackToPage("/_Host");
        });
    }
}