使用"属性"创建"请求IP"约束

Question

我想做以下(伪代码):

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

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

我该如何创建这个" InternalOnly"属性？

Answer 1

您可以创建自定义过滤器属性:

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");
    }
}