如何获取代理背后的本地IP地址
本文关键字:IP 地址 背后 代理 何获取 获取 | 更新日期: 2023-09-27 18:10:29
我使用这个扩展方法来跟踪用户的IP地址:
public static string GetUser_IP_Address(string input = null)
{
string visitorsIpAddr = string.Empty;
if (HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"] != null)
{
visitorsIpAddr = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"].ToString();
}
else if (!string.IsNullOrEmpty(HttpContext.Current.Request.UserHostAddress))
{
visitorsIpAddr = HttpContext.Current.Request.UserHostAddress;
}
if (input != null)
{
return string.Format("Your IP address is {0}.", visitorsIpAddr);
}
return visitorsIpAddr;
}
上面的代码给了我没有代理的计算机上的实际地址,但是那些有代理设置的计算机给了我代理服务器的IP地址。
任何想法?
StackExchange DataExplorer App还使用以下功能确定代理后用户的IP地址。你可以去看看。
/// <summary>
/// When a client IP can't be determined
/// </summary>
public const string UnknownIP = "0.0.0.0";
private static readonly Regex _ipAddress = new Regex(@"'b([0-9]{1,3}'.){3}[0-9]{1,3}$",
RegexOptions.Compiled | RegexOptions.ExplicitCapture);
/// <summary>
/// returns true if this is a private network IP
/// http://en.wikipedia.org/wiki/Private_network
/// </summary>
private static bool IsPrivateIP(string s)
{
return (s.StartsWith("192.168.") || s.StartsWith("10.") || s.StartsWith("127.0.0."));
}
public static string GetRemoteIP(NameValueCollection ServerVariables)
{
string ip = ServerVariables["REMOTE_ADDR"]; // could be a proxy -- beware
string ipForwarded = ServerVariables["HTTP_X_FORWARDED_FOR"];
// check if we were forwarded from a proxy
if (ipForwarded.HasValue())
{
ipForwarded = _ipAddress.Match(ipForwarded).Value;
if (ipForwarded.HasValue() && !IsPrivateIP(ipForwarded))
ip = ipForwarded;
}
return ip.HasValue() ? ip : UnknownIP;
}
这里HasValue()
是在另一个类中定义的扩展,如下所示:
public static class Extensions
{
public static bool HasValue(this string s)
{
return !string.IsNullOrEmpty(s);
}
}