1

我目前正在使用 Castle DynamicProxy 实现拦截器。我需要拦截器在我的服务层方法上获取一些自定义属性,但 invocation.Method.GetCustomAttributes 什么也不返回。有什么我可能做错了吗?

截取方法:

 [Transaction()]
 [SecurityRole(AuthenticationRequired = false, Role = SystemRole.Unauthorised)]
 public virtual void LoginUser(out SystemUser userToLogin, string username)
 {
     ...
 }

拦截器:

// Checks that a security attribute has been defined
foreach (SecurityRoleAttribute role in invocation.Method.GetCustomAttributes(typeof(SecurityRoleAttribute), true))
{
    if (!securityAttributeDefined)
        securityAttributeDefined = true;
}

我也试过:

Attribute.GetCustomAttribute(invocation.Method, typeof(SecurityRoleAttribute), true);

更新:

可能是配置问题。配置代码如下:

拦截器安装程序:

    public void Install(IWindsorContainer container, IConfigurationStore store)
    {
         container.Register(
            Component.For<LoggingInterceptor>()
            .Named("LoggingInterceptor"));

         container.Register(
            Component.For<SecurityInterceptor>()
            .Named("SecurityInterceptor"));

         container.Register(
            Component.For<ValidationInterceptor>()
            .Named("ValidationInterceptor"));
    }

服务安装程序:

    public void Install(IWindsorContainer container, IConfigurationStore store)
    {
        string[] interceptors = {"LoggingInterceptor", "SecurityInterceptor"};

        container.Register(AllTypes.FromAssemblyContaining<BaseService>().Pick()
                            .If(Component.IsInSameNamespaceAs<LoginService>())
                            .Configure(c => c
                                               .LifeStyle.Transient
                                               .Interceptors(interceptors))
                            .WithService.DefaultInterface());
    }

我正在使用 Castle 2.5.2/.Net 3.5。

谢谢,

保罗

4

2 回答 2

5

原来是因为代理是接口代理。获取方法调用目标,然后从 methodInfo 获取属性修复它:

    MethodInfo methodInfo = invocation.MethodInvocationTarget; 
    if (methodInfo == null) { 
        methodInfo = invocation.Method; 
    }
于 2011-06-08T13:18:10.250 回答
1

你的拦截器代码很好,但你注册错了。你写的意思是“如果我要求你IInterceptor,给我SecurityInterceptor”。您想说“拦截对包含LoginUser()(我们称之为Foo)使用的类的调用SecurityInterceptor”。翻译成C#,它看起来像这样:

container.Register(Component.For<Foo>().Interceptors<SecurityInterceptor>());
container.Register(Component.For<SecurityInterceptor>().Named("SecurityInterceptor"));
于 2011-06-04T17:36:35.067 回答