C# aspnet api版本控制：如果在调用api时提供了错误的api版本，为什么api返回200（ok）

下面是使用的NuGet版本

PackageReference Include=“Microsoft.AspNetCore.Mvc.Versioning” Version=“2.3.0”包装参考 Include=“Microsoft.AspNetCore.Mvc.Versioning.ApiExplorer” Version=“2.2.0”PackageReference Include=“Swashback.AspNetCore” Version=“3.0.0”

startup.cs

 services.AddApiVersioning(o =>
            {
                o.ReportApiVersions = true;
                o.DefaultApiVersion = new Microsoft.AspNetCore.Mvc.ApiVersion(1, 0);
                o.AssumeDefaultVersionWhenUnspecified = true;
             o.ErrorResponses = new DefaultErrorResponseProvider();
            });

   [ApiVersion("2.0")]
        [ApiController]
        [Route("api/v{version:apiVersion}/[Controller]")]
        public class DemoTest : ControllerBase
        {
            [HttpGet]
            public IActionResult Get()
            {
                return new JsonResult(new { ResourceName = "DemoTestAPIController Version 2" });
            }
        }

DemostController.cs

 services.AddApiVersioning(o =>
            {
                o.ReportApiVersions = true;
                o.DefaultApiVersion = new Microsoft.AspNetCore.Mvc.ApiVersion(1, 0);
                o.AssumeDefaultVersionWhenUnspecified = true;
             o.ErrorResponses = new DefaultErrorResponseProvider();
            });

   [ApiVersion("2.0")]
        [ApiController]
        [Route("api/v{version:apiVersion}/[Controller]")]
        public class DemoTest : ControllerBase
        {
            [HttpGet]
            public IActionResult Get()
            {
                return new JsonResult(new { ResourceName = "DemoTestAPIController Version 2" });
            }
        }

对于上述控制器

[ApiVersion("1.0")]
[ApiExplorerSettings(GroupName = "v1")]
[Route("api/v{version:apiVersion}/[controller]")]
[ApiController]
public class ValuesController : ControllerBase

（此URL有效，其响应应为200，并按预期工作）

但是对于下面的URL，响应应该是400（禁止）。

以下是各api与SOINIG案例的预期响应。

一直尝试到现在： 我还尝试使用

MyErrorResponseProvider

覆盖DefaultError响应，但调试器根本没有命中它

借助于这个

MyErrorResponseProvider

class MyErrorResponseProvider : DefaultErrorResponseProvider
{
// note: in Web API the response type is HttpResponseMessage
public override IActionResult CreateResponse( ErrorResponseContext context )
{
       switch ( context.ErrorCode )
       {
           case "UnsupportedApiVersion":
               context = new ErrorResponseContext(
                   context.Request,
                   context.StatusCode,
                   context.ErrorCode,
                   "My custom error message.",
                   context.MessageDetail );
               break;
       }

       return base.CreateResponse( context );
}
}

下面的代码为我工作

我使用的是3.1.6版

<PackageReference Include="Microsoft.AspNetCore.Mvc.Versioning" Version="3.1.6" />

我的控制器

[ApiVersion("1.0")]
[ApiExplorerSettings(GroupName = "v1")]
[Route("api/v{version:apiVersion}/[controller]")]
[ApiController]
public class ValuesController : ControllerBase

如果我尝试使用v2，我会得到这个错误

error: {
  code: "UnsupportedApiVersion",
  message: "The HTTP resource that matches the request URI 'http://localhost:61273/api/v2/values' does not support the API version '2'.",
  innerError: null
}

---

感谢您的快速响应，我意识到以下行缺少

services.AddMvc（）.SetCompatibilityVersion（CompatibilityVersion.Version_2_2）这真神奇！