c# – 使用Attribute创建Request IP约束

[InternalOnly]
public ActionResult InternalMethod()
{ //magic }

“InternalOnly”属性适用于在执行任何其他操作之前应检查HttpContext请求IP是否已知值的方法.

我将如何创建这个“InternalOnly”属性？

public class InternalOnly : FilterAttribute
{
    public void OnAuthorization (AuthorizationContext filterContext)
    {
        if (!IsIntranet (filterContext.HttpContext.Request.UserHostAddress))
        {
            throw new HttpException ((int)HttpStatusCode.Forbidden, "Access forbidden.");
        }
    }

    private bool IsIntranet (string userIP)
    {
        // match an internal IP (ex: 127.0.0.1)
        return !string.IsNullOrEmpty (userIP) && Regex.IsMatch (userIP, "^127");
    }
}