使用具有终结点路由 ASP.NET 核心中的 CreatedAtRouteResult 生成包含分段的 URL

Question

如果我理解正确的话，在 ASP.NET Core 3中，应该使用端点路由。出于这个原因，我编写了一个这样的Startup类：

public class Startup
{
public void ConfigureServices(IServiceCollection services)
{
services.AddControllers();
}
public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
{
if (env.IsDevelopment())
app.UseDeveloperExceptionPage();
app.UseRouting();
app.UseEndpoints(endpoints => { endpoints.MapControllers(); });
}
}

我现在想用Post和Get方法创建一个 REST 资源，如下所示：

[ApiController, Route("[controller]")]
public class FooController
{
[HttpPost]
public ActionResult Post(Foo foo)
{
return new CreatedAtRouteResult(new { id = foo.Id }, foo);
}
[HttpGet("{id}")]
public ActionResult Get(string id)
{
return new OkObjectResult(new Foo { Id = id });
}
}

我可以使用我认为资源的规范 URLGET资源：

$ curl -v http://localhost:52268/foo/bar
*   Trying ::1:52268...
* TCP_NODELAY set
* Connected to localhost (::1) port 52268 (#0)
> GET /foo/bar HTTP/1.1
> Host: localhost:52268
> User-Agent: curl/7.67.0
> Accept: */*
>
* Mark bundle as not supporting multiuse
< HTTP/1.1 200 OK
< Transfer-Encoding: chunked
< Content-Type: application/json; charset=utf-8
< Server: Microsoft-IIS/10.0
< X-Powered-By: ASP.NET
< Date: Tue, 12 May 2020 15:25:12 GMT
<
{"id":"bar"}* Connection #0 to host localhost left intact

酷，这行得通。让我们尝试POST一个表示：

$ curl -v http://localhost:52268/foo -H "Content-Type: application/json" -d "{ "id": "bar" }"
*   Trying ::1:52268...
* TCP_NODELAY set
* Connected to localhost (::1) port 52268 (#0)
> POST /foo HTTP/1.1
> Host: localhost:52268
> User-Agent: curl/7.67.0
> Accept: */*
> Content-Type: application/json
> Content-Length: 15
>
* upload completely sent off: 15 out of 15 bytes
* Mark bundle as not supporting multiuse
< HTTP/1.1 201 Created
< Transfer-Encoding: chunked
< Content-Type: application/json; charset=utf-8
< Location: http://localhost:52268/Foo?id=bar
< Server: Microsoft-IIS/10.0
< X-Powered-By: ASP.NET
< Date: Tue, 12 May 2020 15:25:53 GMT
<
{"id":"bar"}* Connection #0 to host localhost left intact

请注意Location标头。这是http://localhost:52268/Foo?id=bar，而不是http://localhost:52268/foo/bar。id的格式为查询字符串参数，而不是 URL 段。

如何使生成的网址http://localhost:52268/foo/bar？

(忽略大小写问题。如果你能告诉我如何到达http://localhost:52268/Foo/bar那将算作一个答案。

Answer 1

您可以使用CreatedAtAction，如果您的控制器类派生自Controller或ControllerBase，则可以使用它：

return CreatedAtAction(nameof(Get), new { foo.Id }, foo);

或尝试命名路线，例如

return new CreatedAtRouteResult(nameof(Get), new { id = foo.Id }, foo);

然后将Get的属性更改为

[HttpGet("{id}", Name = nameof(Get))]
public ActionResult Get(string id)
{
return new OkObjectResult(new Foo { Id = id });
}