Question

我有两个Net Core API控制器：RealController和MockController，我想基于哪个控制器接受请求在应用程序中注入差异服务。

例如，如果请求被RealController接受，我想在所有需要的类中注入RealSharedService（作用域），但是如果请求被MockController接受，我而是要注入MockSharedService。

public class RealController : ControllerBase
{
    public RealController(...)
    {
        //I could do somethig here to change the ISharedService intance to RealSharedService
    }
}

public class MockController : ControllerBase
{
    public MockController(...)
    {
        //I could do somethig here to change the ISharedService intance to MockSharedService
    }
}

public class Service1
{
    public Service1(ISharedService sharedService)
    {
        //The ISharedService instance must be RealSharedService or MockSharedService based on
        // the request, if it was accepted by RealController or MockController
    }
}

public class RealSharedService : ISharedService
{
    ....
}
public class MockSharedService : ISharedService
{
    ....
}

Answer 1

您可以使用HttpContextAccessor有条件地解析您的服务：

services.AddHttpContextAccessor();

services.AddScoped<ISharedService>(sp => {
   var httpContext = sp.GetService<IHttpContextAccessor>().HttpContext;
   Endpoint endpoint = httpContext.Features.Get<IEndpointFeature>()?.Endpoint;
   if (endpoint.DisplayName.Contains("MockController"))
   {
      return new MockService();
   }
   else
   {
      return new RealService();
   }
});

每个请求覆盖依赖项注入

1 个答案: