路由不适用于自托管的Web API

Question

这基本上就是我所拥有的,一个非常简单的三个文件集,带有新的asp.net核心2.1(实际上是从教程中复制粘贴的):

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

    public static IWebHostBuilder CreateWebHostBuilder(string[] args) =>
        WebHost.CreateDefaultBuilder(args)
            .UseStartup<Startup>();
}

然后是最简单的启动

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

    public IConfiguration Configuration { get; }

    public void ConfigureServices(IServiceCollection services)
    {
        services.AddMvc();
    }

    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        app.UseMvc();
    }
}

和默认值控制器

[Route("api/[controller]")]
[ApiController]
public class ValuesController : ControllerBase
{
    [HttpGet]
    public ActionResult<IEnumerable<string>> Get()
    {
        return new string[] { "value1", "value2" };
    }
}

不管我叫什么,我在控制台看到同样的404错误:

Application started. Press Ctrl+C to shut down.
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:5000/values
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 105.0181ms 404
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[1]
      Request starting HTTP/1.1 GET http://localhost:5000/api/values
info: Microsoft.AspNetCore.Hosting.Internal.WebHost[2]
      Request finished in 2.6016ms 404
etc

我尝试添加默认路由app.UseMvcWithDefaultRoute();并手动指定它.我在使用默认路由时尝试删除路由属性.也尝试添加AddControllersAsServices().但结果仍然相同 - 404.当我设置自定义处理程序app.Run然后它没有任何问题.

---

csproj(我已经替换了默认的Microsoft.AspNetCore.All依赖项,但路由仍然不起作用)

<Project Sdk="Microsoft.NET.Sdk">

  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <TargetFramework>netcoreapp2.1</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" Version="2.1.0" />
  </ItemGroup>

</Project>

Answer 1

这很难追查,但问题归结为你的.csproj:

<Project Sdk="Microsoft.NET.Sdk">

在构建Web应用程序时,需要引用Web Sdk,如下所示:

<Project Sdk="Microsoft.NET.Sdk.Web">

我设法通过这个小改动重现并修复你的问题.

Answer 2

对我来说，它有助于增加AddApplicationPart后AddMvc是这样的：

.AddMvc()
.AddApplicationPart(typeof(Startup).Assembly)