从 ASP.NET Core 应用程序的根返回特定响应

Question

我创建了一个 ASP.NET Core 应用程序，其中包含一些运行良好的控制器。

路由系统的结构类似于https://something.com/api/controller 。

但是，我使用 Azure 中的“始终在线”选项来保持 Web 应用程序始终处于活动状态，并且不会在空闲时暂停。

问题是，每隔 5 分钟，Azure 就会使用地址https://something.com ping 我的应用程序，并返回 404 错误，该错误记录在我的 Application Insights 报告中。

我想知道如何处理对我的应用程序根目录发出的请求并返回 200 HTTP 结果。

这是我的启动类：

public class Startup
{
    public Startup(IHostingEnvironment env)
    {
        var builder = new ConfigurationBuilder()
            .SetBasePath(env.ContentRootPath)
            .AddJsonFile("appsettings.json", optional: false, reloadOnChange: true)
            .AddJsonFile($"appsettings.{env.EnvironmentName}.json", optional: true)
            .AddEnvironmentVariables();
        Configuration = builder.Build();
    }

    private IConfigurationRoot Configuration { get; }

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

        services.AddSingleton<ICachingService>(e => new CachingService(Configuration["Redis:ConnectionString"]));

        var loggingService = new LoggingService(Configuration["ApplicationInsights:InstrumentationKey"]);
        services.AddSingleton(typeof(ILoggingService), loggingService);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        loggerFactory.AddConsole(Configuration.GetSection("Logging"));
        loggerFactory.AddDebug();

        app.UseMvc();
    }
}

Answer 1

好吧，它实际上非常简单：

    public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
    {
        app.UseMvc();
        app.Run(async context =>
        {
            await context.Response.WriteAsync("API"); // returns a 200 with "API" as content.
        });
    }

Answer 2

public void Configure(IApplicationBuilder app)
{
   app.UseEndpoints(endpoints =>
   {
      endpoints.MapGet("/", (context) => context.Response.WriteAsync("Success"));
   });
}