SystemHelper类(IP操作)

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本文介绍了一种通过C#实现的方法来获取客户端的真实IP地址、代理IP、本地IP及操作系统信息等。提供了多种获取IP地址的方式，并展示了如何判断IP的有效性及获取时区ID。

public class SystemHelper
{
/// <summary>
/// 获取客户端IP地址
/// </summary>
/// <returns>若失败则返回回送地址</returns>
public static string GetHostAddress()
{
string userHostAddress = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

if (string.IsNullOrEmpty(userHostAddress))
{
userHostAddress = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}
if (string.IsNullOrEmpty(userHostAddress))
{
userHostAddress = HttpContext.Current.Request.UserHostAddress;
}
//最后判断获取是否成功，并检查IP地址的格式（检查其格式非常重要）
if (!string.IsNullOrEmpty(userHostAddress) && IsIP(userHostAddress))
{
return userHostAddress;
}
return "127.0.0.1";
}

/// <summary>
/// 检查IP地址格式
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static bool IsIP(string ip)
{
return Regex.IsMatch(ip, @"^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$");
}

/// <summary>
/// 获取真实IP
/// </summary>
/// <returns></returns>
public static string GetRealIP()
{
string result = string.Empty;

result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];

//可能有代理
if (!string.IsNullOrWhiteSpace(result))
{
//没有"." 肯定是非IP格式
if (result.IndexOf(".") == -1)
{
result = null;
}
else
{
//有","，估计多个代理。取第一个不是内网的IP。
if (result.IndexOf(",") != -1)
{
result = result.Replace(" ", string.Empty).Replace("\"", string.Empty);

string[] temparyip = result.Split(",;".ToCharArray());

if (temparyip != null && temparyip.Length > 0)
{
for (int i = 0; i < temparyip.Length; i++)
{
//找到不是内网的地址
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];
}
}
}
}
//代理即是IP格式
else if (IsIPAddress(result))
{
return result;
}
//代理中的内容非IP
else
{
result = "127.0.0.1";
}
}
}

if (string.IsNullOrWhiteSpace(result))
{
result = HttpContext.Current.Request.ServerVariables["REMOTE_ADDR"];
}

if (string.IsNullOrWhiteSpace(result))
{
result = HttpContext.Current.Request.UserHostAddress;
}

return result;
}

/// <summary>
/// 获取代理ip
/// </summary>
/// <returns></returns>
public static string GetProxyIp()
{
var result = HttpContext.Current.Request.ServerVariables["HTTP_X_FORWARDED_FOR"];
if (string.IsNullOrEmpty(result))
{
return "";
}
return result;
}

/// <summary>
/// 获取客户端本地IP
/// </summary>
/// <param name="type">内网ip</param>
/// <returns></returns>
public static string GetLocalIP()
{
IPHostEntry host;
string localIP = "";
host = Dns.GetHostEntry(Dns.GetHostName());
foreach (IPAddress ip in host.AddressList)
{
if (ip.AddressFamily.ToString() == "InterNetwork")
{
localIP = ip.ToString();
break;
}
}
return localIP;
}

/// <summary>
/// 获取时区ID
/// </summary>
/// <returns></returns>
public static string GetTimeZoneInfo()
{
TimeZoneInfo local = TimeZoneInfo.Local;
return local.Id;
}

/// <summary>
/// 是否是IP地址
/// </summary>
/// <param name="str"></param>
/// <returns></returns>
public static bool IsIPAddress(string str)
{
if (string.IsNullOrWhiteSpace(str) || str.Length < 7 || str.Length > 15)
return false;

string regformat = @"^\d{1,3}[\.]\d{1,3}[\.]\d{1,3}[\.]\d{1,3}{1}";

Regex regex = new Regex(regformat, RegexOptions.IgnoreCase);

return regex.IsMatch(str);
}

/// <summary>
/// 操作系统
/// </summary>
/// <returns></returns>
public static string GetOprationSystem()
{
// this.CustomerIP.Value = Request.UserHostAddress.ToString(); //获取IP
// this.CustomerBrowserLanguage.Value = Request.UserLanguages[0].ToString(); //获取浏览器语言
var userAgent = HttpContext.Current.Request.UserAgent;
string osVersion = "未知";
if (!string.IsNullOrEmpty(userAgent))
{
if (userAgent.Contains("NT 6."))
{
osVersion = "Windows Vista/Server 2008";
}
else if (userAgent.Contains("NT 5.2"))
{
osVersion = "Windows Server 2003";
}
else if (userAgent.Contains("NT 5.1"))
{
osVersion = "Windows XP";
}
else if (userAgent.Contains("NT 5"))
{
osVersion = "Windows 2000";
}
else if (userAgent.Contains("NT 4"))
{
osVersion = "Windows NT4";
}
else if (userAgent.Contains("NT"))
{
osVersion = "Windows 8及以上版本";
}
else if (userAgent.Contains("Me"))
{
osVersion = "Windows Me";
}
else if (userAgent.Contains("98"))
{
osVersion = "Windows 98";
}
else if (userAgent.Contains("95"))
{
osVersion = "Windows 95";
}
else if (userAgent.Contains("Mac"))
{
osVersion = "Mac";
}
else if (userAgent.Contains("Unix"))
{
osVersion = "UNIX";
}
else if (userAgent.Contains("Linux"))
{
osVersion = "Linux";
}
else if (userAgent.Contains("SunOS"))
{
osVersion = "SunOS";
}
}
return osVersion;
}
}