.net取得客户端真实IP

来源：互联网发布：c语言switch语句举例编辑：程序博客网时间：2024/04/28 19:54
        /// <summary>         /// 取得客户端真实IP。如果有代理则取第一个非内网地址         /// </summary>         public static string IPAddress        {            get            {                string result = String.Empty;                result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];                if (result != null && result != String.Empty)                {                    //可能有代理                     if (result.IndexOf(".") == -1)    //没有“.”肯定是非IPv4格式                         result = null;                    else                    {                        if (result.IndexOf(",") != -1)                        {                            //有“,”，估计多个代理。取第一个不是内网的IP。                             result = result.Replace(" ", "").Replace("'", "");                            string[] temparyip = result.Split(",;".ToCharArray());                            for (int i = 0; i < temparyip.Length; i++)                            {                                if (IsIPAddress(temparyip[i])                                    && temparyip[i].Substring(0, 3) != "10."                                    && temparyip[i].Substring(0, 7) != "192.168"                                    && temparyip[i].Substring(0, 7) != "172.16.")                                {                                    return temparyip[i];    //找到不是内网的地址                                 }                            }                        }                        else if (IsIPAddress(result)) //代理即是IP格式                             return result;                        else                            result = null;    //代理中的内容 非IP，取IP                     }                }                string IpAddress = (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null && HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != String.Empty) ? HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] : HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];                if (null == result || result == String.Empty)                    result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];                if (result == null || result == String.Empty)                    result = HttpContext.Current.Request.UserHostAddress;                return result;            }        }        //// <summary>        /// 判断是否是IP地址格式 0.0.0.0        /// </summary>        /// <param name="str1">待判断的IP地址</param>        /// <returns>true or false</returns>        public static bool IsIPAddress(string str1)        {            if (str1 == null || str1 == string.Empty || str1.Length < 7 || str1.Length > 15) return false;            string regformat = @"^\d{1,3}[\.]\d{1,3}[\.]\d{1,3}[\.]\d{1,3}$";            Regex regex = new Regex(regformat, RegexOptions.IgnoreCase);            return regex.IsMatch(str1);        }
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