asp.net mvc에 대한 Ninject 및 Filter 속성을 사용한 종속성 주입

asp.net mvc에 대한 Ninject 및 Filter 속성을 사용한 종속성 주입

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asp.net mvc 3에 대한 사용자 지정 권한 부여 필터를 작성하고 있습니다. 클래스에 userservice를 삽입해야하는데 어떻게해야할지 모르겠습니다.

public class AuthorizeAttribute : FilterAttribute, IAuthorizationFilter
{
    private IUserService userService;
    private string[] roles;

    public AuthorizeAttribute(params string[] roles)
    {
        this.roles = roles;
    }

    public void OnAuthorization(AuthorizationContext filterContext)
    {
        throw new NotImplementedException();
    }
}

나는 의존성 주입을 위해 ninject를 사용하고 있습니다. 팩토리 또는 서비스 로케이터 패턴을 사용하고 싶지 않습니다.

내 바인딩은 global.acsx에서 다음과 같습니다.

    internal class SiteModule : NinjectModule
    {
        public override void Load()
        {
            Bind<IUserService>().To<UserService>();
        }
    }

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이 답변을 참조하십시오.

맞춤 인증 MVC 3 및 ​​Ninject IoC

생성자 주입을 사용하려면 속성과 필터를 만들어야합니다.

///marker attribute
public class MyAuthorizeAttribute : FilterAttribute { }

//filter
public class MyAuthorizeFilter : IAuthorizationFilter
{
      private readonly IUserService _userService;
      public MyAuthorizeFilter(IUserService userService)
      {
          _userService = userService;
      }

      public void OnAuthorization(AuthorizationContext filterContext)
      {
          var validUser = _userService.CheckIsValid();

          if (!validUser)
          {
              filterContext.Result = new RedirectToRouteResult(new RouteValueDictionary { { "action", "AccessDenied" }, { "controller", "Error" } });
          }
      }
}

제본:

this.BindFilter<MyAuthorizeFilter>(System.Web.Mvc.FilterScope.Controller, 0).WhenControllerHas<MyAuthorizeAttribute>();

제어 장치:

[MyAuthorizeAttribute]
public class YourController : Controller
{

}

HTH ...

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나는 것이 매우 BZ의 답변을 권장합니다. [주입]을 사용하지 마십시오!

나는 Darin Dimitrov가 가능하다고 말한 것과 같은 [Inject]를 사용했으며 실제로 .InRequestScope와 함께 높은 부하, 높은 경합 상황에서 스레딩 문제를 일으켰습니다.

B Z's way is also what is on the Wiki and I have seen many places where Remo Gloor (Ninject author) says this is the correct way to do it

https://github.com/ninject/ninject.web.mvc/wiki/Filter-configurations

Downvote [Inject] answers in here because seriously you will get burned (probably in production if you don't load test properly prior!)

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I found a simple solution for any occasion where construction is not handled by Ninject:

var session = (IMyUserService)DependencyResolver.Current.GetService(typeof (IMyUserService));

Actually this is exactly what I am using with my custom AuthorizeAttribute. Much easier than having to implement a separate FilterAttribute.

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On way would be to use a property injection and decorate the property with the [Inject] attribute:

public class AuthorizeAttribute : FilterAttribute, IAuthorizationFilter
{
    [Inject]
    public IUserService UserService { get; set; }

    private string[] roles;

    ...
}

Constructor injection doesn't work well with attributes as you will no longer be able to decorate controllers/actions with them. You could only use constructor injection with the filter binding syntax in NInject:

public class AuthorizeAttribute : FilterAttribute, IAuthorizationFilter
{
    private readonly IUserService userService;

    private string[] roles;

    public AuthorizeAttribute(IUserService userService, params string[] roles)
    {
        this.userService = userService;
        this.roles = roles;
    }

    ...
}

and then:

internal class SiteModule : Ninject.Modules.NinjectModule
{
    public override void Load()
    {
        Bind<IUserService>().To<UserService>();

        this.BindFilter<AuthorizeAttribute>(FilterScope.Controller, 0)
            .WhenControllerType<AdminController>();
    }
}

The BindFilter<> extension method is defined in the Ninject.Web.Mvc.FilterBindingSyntax namespace so make sure you have brought that into scope before calling it on a kernel.

ReferenceURL : https://stackoverflow.com/questions/6193414/dependency-injection-with-ninject-and-filter-attribute-for-asp-net-mvc