8

我有一个非常简单的场景。我想用自定义授权属性装饰我的控制器/操作。如果任何属性有效,则应授予授权。例如,

[MyAuth(1)]
[MyAuth(2)]
public class MyController : Controller
{
    ...
}

我无法将参数组合成一个授权属性。上面的例子只是一个简化的例子。

如果任一属性授权用户,我希望用户被授权。我假设ActionFilterAttribute或者AuthorizeAttribute有办法查看其他过滤器已执行并等待执行,但没有这样的运气。

我怎样才能做到这一点?由于属性似乎没有任何意识,也许是HttpModule?一个习俗ControllerActionInvoker

4

3 回答 3

6

我昨晚设法让它工作。我的解决方案如下。该属性非常标准,我已经修剪了实际的授权部分。有趣的事情发生在HasAssignedAcccessActionInvoker.

[AttributeUsage(AttributeTargets.Class | AttributeTargets.Method, AllowMultiple = true)]
public class RequiresAssignedAccess : AuthorizeAttribute
{
    public int AccessType { get; private set; }
    public int IdType { get; private set; }
    public int IdValue { get; private set; }
    public int Level { get; private set; }

    public RequiresAssignedAccess(int accessType, int idType, int idValue, int level)
    {
        ...
    }

    protected override bool AuthorizeCore(HttpContextBase httpContext)
    {
        if (!base.AuthorizeCore(httpContext))
            return false;

        bool retval = ...

        return retval;
    }
}

HasAssignedAcccessActionInvoker继承自标准操作调用程序,但我重写了该InvokeAuthorizationFilters方法以添加我们需要的授权逻辑。标准调用程序只是通过授权过滤器旋转,如果它们中的任何一个返回结果,它就会中断循环。

public class HasAssignedAcccessActionInvoker : ControllerActionInvoker
{
    protected override AuthorizationContext InvokeAuthorizationFilters(ControllerContext controllerContext, IList<IAuthorizationFilter> filters, ActionDescriptor actionDescriptor)
    {
        AuthorizationContext authCtx = new AuthorizationContext(controllerContext, actionDescriptor);

        /*
         * If any of the filters are RequiresAssignedAccess, default this to false.  One of them must authorize the user.
         */
        bool hasAccess = !filters.Any(f => f is RequiresAssignedAccess);

        foreach (IAuthorizationFilter current in filters)
        {
            /*
             * This sets authorizationContext.Result, usually to an instance of HttpUnauthorizedResult
             */
            current.OnAuthorization(authCtx);

            if (current is RequiresAssignedAccess)
            {
                if (authCtx.Result == null)
                {
                    hasAccess = true;
                }
                else if (authCtx.Result is HttpUnauthorizedResult)
                {
                    authCtx.Result = null;
                }

                continue;
            }

            if (authCtx.Result != null)
                break;
        }

        if (!hasAccess && authCtx.Result == null)
            authCtx.Result = new HttpUnauthorizedResult();

        return authCtx;
    }
}

我不得不用 ILSpy 查看 MVC 的内部结构来解决这个问题。作为参考,这是该方法的重写版本:

protected virtual AuthorizationContext InvokeAuthorizationFilters(ControllerContext controllerContext, IList<IAuthorizationFilter> filters, ActionDescriptor actionDescriptor)
{
    AuthorizationContext authorizationContext = new AuthorizationContext(controllerContext, actionDescriptor);
    foreach (IAuthorizationFilter current in filters)
    {
        current.OnAuthorization(authorizationContext);
        if (authorizationContext.Result != null)
        {
            break;
        }
    }
    return authorizationContext;
}

最后,为了连接它并使一切成为可能,我们的控制器继承自BaseController,它现在返回新的调用者。

public class BaseController : Controller
{
    protected override IActionInvoker CreateActionInvoker()
    {
        return new HasAssignedAcccessActionInvoker();
    }
}
于 2013-11-06T16:50:28.570 回答
0

据我所知,您不能[Authorize]以您想要的方式链接属性,因为它们都必须通过 (AND) 而不是 (OR) 行为。但是,将这些项目组合为一个不会导致您必须进行一些魔术字符串操作,无论您需要传递给它的参数数量如何。您可以定义您自己的一组可用于Authorize属性的参数。

public class SuperCoolAuthorize : AuthorizationAttribute
{
    public string Parameter1{get;set;}
    public string Parameter2{get;set;}
    public int Parameter3{get;set;}
    public string Parameter4{get;set;}
    public override void OnAuthorization(AuthorizationContext filterContext)
    {
        // your custom behaviour
    }
}

在你的控制器/动作方法上

[Authorize(Parameter1 = "Foo", Parameter2 = "Bar", Parameter3 = 47, Parameter4 = string.Empty)
public ActionResult MyControllerAction(){
...
}

我在帮助制定此答案时遇到了有关自定义授权属性的其他一些注意事项的精彩帖子。

于 2013-11-05T03:19:12.403 回答
0
public class AuthUserAttribute : AuthorizeAttribute {

public string[] SecurityGroups;
public string Groups { get; set; }

protected override bool AuthorizeCore(HttpContextBase httpContext) {
  bool valid = false;

  var user = UserInformation.Current;

  if (user.SecurityGroups.Select(x => x).Intersect(this.SecurityGroups).Any()) {
    valid = true;
  }

  if (user.SecurityGroups.Select(x => x).Intersect(new string[] { "IT Administrators" }).Any()) {
    valid = true;
  }

  return valid;
}

public override void OnAuthorization(AuthorizationContext filterContext) {
  if (!this.AuthorizeCore(filterContext.HttpContext)) {
    if (UserInformation.Current.SecurityGroups.Count == 0) {
      filterContext.Result = new RedirectResult(string.Format("/oa?ReturnUrl={0}", filterContext.HttpContext.Request.RawUrl));
    }
    else {
      filterContext.Result = new RedirectResult(string.Format("/oa/user/permissions?ReturnUrl={0}", filterContext.HttpContext.Request.RawUrl));
    }
  }
  else {
    base.OnAuthorization(filterContext);
  }
}

}

然后我用

[AuthUser(SecurityGroups = new string[] { "Data1", "Data2" })]
public ActionResult ForYourEyesOnly() {


}

我们会看看是否有人抓住了邦德的参考资料。哈哈

于 2013-11-05T05:15:55.623 回答