如何有效地测试动作是否用属性(AuthorizeAttribute)装饰? [英] How to efficiently test if action is decorated with an attribute (AuthorizeAttribute)?

问题描述

我正在使用MVC，并且遇到一种情况，在我的 OnActionExecuting()中，我需要确定要执行的Action方法是否装饰有属性，即 AuthorizeAttribute .我不是在问授权是否成功/失败，而是在问方法是否需要授权.

I'm using MVC and have a situation where in my OnActionExecuting() I need to determine if the Action method that is about to execute is decorated with an attribute, the AuthorizeAttribute in particular. I'm not asking if authorization succeeded/failed, instead I'm asking does the method require authorization.

对于非mvc的人 filterContext.ActionDescriptor.ActionName 是我正在寻找的方法名称.但是，它不是当前正在执行的方法.相反，这是一种将很快执行的方法.

For non-mvc people filterContext.ActionDescriptor.ActionName is the method name I'm looking for. It is not, however, the currently executing method; rather, it is a method that will be executed shortly.

目前，我有一个类似下面的代码块，但是我对每次操作之前的循环都不满意.有更好的方法吗?

Currently I have a code block like below, but I'm not terribly pleased with the looping prior to every action. Is there a better way to do this?

System.Reflection.MethodInfo[] actionMethodInfo = this.GetType().GetMethods();

foreach(System.Reflection.MethodInfo mInfo in actionMethodInfo) {
    if (mInfo.Name == filterContext.ActionDescriptor.ActionName) {
        object[] authAttributes = mInfo.GetCustomAttributes(typeof(System.Web.Mvc.AuthorizeAttribute), false);

        if (authAttributes.Length > 0) {

            <LOGIC WHEN THE METHOD REQUIRES AUTHORIZAITON>

            break;
        }
    }
}

这有点像标题不正确的"

This is a little like the slightly mistitled "How to determine if a class is decorated with a specific attribute" but not quite.

推荐答案

您可以简单地使用filterContext.ActionDescriptor.GetCustomAttributes

You can simply use filterContext.ActionDescriptor.GetCustomAttributes

public override void OnActionExecuting(ActionExecutingContext filterContext)
{
    bool hasAuthorizeAttribute = filterContext.ActionDescriptor
        .GetCustomAttributes(typeof(AuthorizeAttribute), false)
        .Any();

    if (hasAuthorizeAttribute)
    { 
        // do stuff
    }

    base.OnActionExecuting(filterContext);
}

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