為什么 Asp.Net Core Kestrel 服務器向 Ngrok 返回 404 並且控制器永遠不會被調用？

Question

幾天來，我一直在嘗試運行一個簡單的 asp.net 核心應用程序，並為 Telegram bot 設置 webhook。 它在 Mac 上運行，帶有 Kestrel 服務器和 Ngrok，用於將 https 代理到 webhook。 目前它返回 404 給 Ngrok，我也在控制台中看到 404。 任何幫助表示贊賞。 我已經嘗試了這一行的各種修改./ngrok http http://localhost:5000 -host-header=localhost:5000

我是 Asp.Net Core 的初學者。 這是我的應用程序的核心部分：

[Route("/")]
[ApiController]
public class UpdateController : ControllerBase
{
    [HttpPost]
    public async Task<OkResult> Post([FromBody]Update update)

這個永遠不會被調用。 這是我的 Program.cs

public class Program
{
    public static void Main(string[] args)
    {
        BuildWebHost(args).Run();
    }

    private static IWebHost BuildWebHost(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseKestrel()
            .UseContentRoot(Directory.GetCurrentDirectory())
            .UseStartup<Startup>()
            .Build();
}

啟動文件

public class Startup
{
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        
        Bot.GetBotClientAsync().Wait();
    }
}

機器人

public static class Bot
{
    private static TelegramBotClient botClient;
    private static List<Command> commandsList;

    public static IReadOnlyList<Command> Commands => commandsList.AsReadOnly();

    public static async Task<TelegramBotClient> GetBotClientAsync()
    {
        if (botClient != null)
        {
            return botClient;
        }

        commandsList = new List<Command>
        {
            new StartCommand()
        };

        botClient = new TelegramBotClient(AppSettings.Token);
        await botClient.SetWebhookAsync(AppSettings.NGrokUrl);
        return botClient;
    }
}

設置 webhook 工作正常，Ngrok 收到請求，但來自 Kestrel 的答案始終是 404，並且永遠不會調用 Post 方法。

控制台輸出示例：

dbug: Microsoft.AspNetCore.Hosting.Diagnostics[3]
      Hosting starting
dbug: Microsoft.AspNetCore.Server.Kestrel.Core.KestrelServer[2]
      Failed to locate the development https certificate at '(null)'.
dbug: Microsoft.AspNetCore.Hosting.Diagnostics[4]
      Hosting started
dbug: Microsoft.AspNetCore.Hosting.Diagnostics[0]
      Loaded hosting startup assembly eBot
Hosting environment: Development
Content root path: /Users/yuriibabii/Projects/eBot/eBot
Now listening on: http://localhost:5000
Application started. Press Ctrl+C to shut down.
dbug: Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets[6]
      Connection id "0HM4GMVPJLPSF" received FIN.
dbug: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HM4GMVPJLPSF" accepted.
dbug: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HM4GMVPJLPSF" started.
dbug: Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets[7]
      Connection id "0HM4GMVPJLPSF" sending FIN because: "The client closed the connection."
dbug: Microsoft.AspNetCore.Server.Kestrel[10]
      Connection id "0HM4GMVPJLPSF" disconnecting.
dbug: Microsoft.AspNetCore.Server.Kestrel[2]
      Connection id "0HM4GMVPJLPSF" stopped.
dbug: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HM4GMVPJLPSG" accepted.
dbug: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HM4GMVPJLPSG" started.
dbug: Microsoft.AspNetCore.Server.Kestrel[39]
      Connection id "0HM4GMVPJLPSH" accepted.
dbug: Microsoft.AspNetCore.Server.Kestrel[1]
      Connection id "0HM4GMVPJLPSH" started.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST http://localhost:5000/ application/json 375
dbug: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[0]
      Wildcard detected, all requests with hosts will be allowed.
trce: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[2]
      All hosts are allowed.
dbug: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HM4GMVPJLPSH" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 45.4537ms 404 
dbug: Microsoft.AspNetCore.Server.Kestrel[25]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000001": started reading request body.
dbug: Microsoft.AspNetCore.Server.Kestrel[26]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000001": done reading request body.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 GET http://localhost:5000/  
trce: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[2]
      All hosts are allowed.
dbug: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HM4GMVPJLPSG" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 9.3331ms 404 
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST http://localhost:5000/ application/json 375
trce: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[2]
      All hosts are allowed.
dbug: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HM4GMVPJLPSH" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 10.7676ms 404 
dbug: Microsoft.AspNetCore.Server.Kestrel[25]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000002": started reading request body.
dbug: Microsoft.AspNetCore.Server.Kestrel[26]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000002": done reading request body.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST http://localhost:5000/ application/json 375
trce: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[2]
      All hosts are allowed.
dbug: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HM4GMVPJLPSH" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 8.5738ms 404 
dbug: Microsoft.AspNetCore.Server.Kestrel[25]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000003": started reading request body.
dbug: Microsoft.AspNetCore.Server.Kestrel[26]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000003": done reading request body.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST http://localhost:5000/ application/json 375
trce: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[2]
      All hosts are allowed.
dbug: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HM4GMVPJLPSH" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 8.8111ms 404 
dbug: Microsoft.AspNetCore.Server.Kestrel[25]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000004": started reading request body.
dbug: Microsoft.AspNetCore.Server.Kestrel[26]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000004": done reading request body.
info: Microsoft.AspNetCore.Hosting.Diagnostics[1]
      Request starting HTTP/1.1 POST http://localhost:5000/ application/json 375
trce: Microsoft.AspNetCore.HostFiltering.HostFilteringMiddleware[2]
      All hosts are allowed.
dbug: Microsoft.AspNetCore.Server.Kestrel[9]
      Connection id "0HM4GMVPJLPSH" completed keep alive response.
info: Microsoft.AspNetCore.Hosting.Diagnostics[2]
      Request finished in 9.6591ms 404 
dbug: Microsoft.AspNetCore.Server.Kestrel[25]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000005": started reading request body.
dbug: Microsoft.AspNetCore.Server.Kestrel[26]
      Connection id "0HM4GMVPJLPSH", Request id "0HM4GMVPJLPSH:00000005": done reading request body.

Answer 1

你發布了所有的 Startup 課程嗎？ 我沒有看到任何 ConfigureServices 方法，您必須在 ConfigureServices 方法中使用 services.AddMvc().AddMvcOptions() 行，也沒有看到 app.UseMvc() 行。

我不太確定，但我一直認為您需要這兩行來啟用控制器。

嘗試以這種方式更改您的 Startup 類：

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().AddMvcOptions();
        services.AddControllersWithViews();
    }


    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        
        app.UseRouting();
        app.UseMvc();

        Bot.GetBotClientAsync().Wait();
    }
}

Answer 2

通過對@PiGi78 的回答進行一些修改，它確實有效。 這是最終的解決方案：

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc().AddMvcOptions(ApplyMvcOptions);
        services.AddControllersWithViews();
        services.AddControllers().AddNewtonsoftJson();
    }

    private void ApplyMvcOptions(MvcOptions options)
    {
        options.EnableEndpointRouting = false;
    }

    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        
        app.UseRouting();
        app.UseMvc();
        
        Bot.GetBotClientAsync().Wait();
    }
}

@PiGi78 非常感謝！