获取客户端ip并用正则表达式验证

代理HTTP_VIA

  /// <summary>
        /// 获得请求的ip
        /// </summary>
        /// <returns></returns>
        public static string GetIP()
        {
            string ip = string.Empty;
            if (HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null)
                ip = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
            else
                ip = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"].ToString();

            if (string.IsNullOrEmpty(ip) || !ValidateHelper.IsIP(ip))
                ip = "127.0.0.1";
            return ip;
        }

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