获取客户端的IP地址

柔光的暖阳◎ 2022-04-24 04:58 265阅读 0赞

# [获取客户端的IP地址][IP] #

#region public static string GetClientIP() 获取客户端的IP地址
            /// <summary>
            /// 获取客户端的IP地址
            /// </summary>
            /// <returns></returns>
            public static string GetClientIP()
            {
                string result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
                if (!string.IsNullOrEmpty(result))
                {
                    //可能有代理 
                    if (result.IndexOf(".", StringComparison.Ordinal) == -1)
                        //没有"."肯定是非IPv4格式 
                        result = null;
                    else
                    {
                        if (result.IndexOf(",", StringComparison.Ordinal) != -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 (string.IsNullOrEmpty(result))
                    result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
                if (string.IsNullOrEmpty(result))
                    result = HttpContext.Current.Request.UserHostAddress;
                return result;
            }
            /// <summary>
            /// ip判断
            /// </summary>
            /// <param name="str1"></param>
            /// <returns></returns>
            private static bool IsIPAddress(string str1)
            {
                if (string.IsNullOrEmpty(str1) || 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);
            }
            #endregion

posted @ 2019-01-23 13:19 [波霸38][38] 阅读( ...) 评论( ...) [编辑][Link 1] 收藏

[IP]: https://www.cnblogs.com/sharing1986687846/p/10308382.html
[38]: https://www.cnblogs.com/sharing1986687846/
[Link 1]: https://i.cnblogs.com/EditPosts.aspx?postid=10308382