string HostName = string.Empty; string ip = string.Empty; string ipv4 = String.Empty; if (!string.IsNullOrEmpty(System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"])) ip = Convert.ToString(System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]); if (string.IsNullOrEmpty(ip)) ip = Request.UserHostAddress; // 利用 Dns.GetHostEntry 方法,由获取的 IPv6 位址反查 DNS 纪录,
// 再逐一判断何者为 IPv4 协议,即可转为 IPv4 位址。 foreach (IPAddress ipAddr in Dns.GetHostEntry(ip).AddressList) { if (ipAddr.AddressFamily.ToString() == "InterNetwork") { ipv4 = ipAddr.ToString(); } } HostName = "主机名: " + Dns.GetHostEntry(ip).HostName + " IP: " + ipv4;
在本机进行程序代码调试测试,其中字符串ip会显示为::1,是IPv6的IP地址格式,相当于127.0.0.1。最终处理成IPv4的显示地址。
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上述方法,代码调试没有问题,但是放在服务器上后,客户端访问就出问题了,有部分电脑能获取主机名,但是ipv4显示为空,另外一部分
Dns.GetHostEntry(ip)中的ip正常,但是执行Dns.GetHostEntry(ip)貌似为null,导致出现异常。最后选择的方法是只记录客户端的IPV4,
/// <summary> /// 获取web客户端ip /// </summary> /// <returns></returns> public static string GetWebClientIp() { string userIP = "未获取用户IP"; try { if (System.Web.HttpContext.Current == null || System.Web.HttpContext.Current.Request == null || System.Web.HttpContext.Current.Request.ServerVariables == null) { return ""; } string CustomerIP = ""; //cdn加速后取到的IP simone 090805 CustomerIP = System.Web.HttpContext.Current.Request.Headers["Cdn-Src-Ip"]; if (!string.IsNullOrEmpty(CustomerIP)) { return CustomerIP; } CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (!String.IsNullOrEmpty(CustomerIP)) { return CustomerIP; } if (System.Web.HttpContext.Current.Request.ServerVariables["HTTP_VIA"] != null) { CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"]; if (CustomerIP == null) { CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; } } else { CustomerIP = System.Web.HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"]; } if (string.Compare(CustomerIP, "unknown", true) == 0 || String.IsNullOrEmpty(CustomerIP)) { return System.Web.HttpContext.Current.Request.UserHostAddress; } return CustomerIP; } catch { } return userIP; }
原文链接:https://www.cnblogs.com/purplefox2008/p/5983957.html
原创文章,作者:优速盾-小U,如若转载,请注明出处:https://www.cdnb.net/bbs/archives/20746