public static string GetRealIP()

{

string result = System.Web.HttpContext.Current.Request.Headers["Cdn-Src-Ip"];

if(string.IsNullOrEmpty(result)){

result = System.Web.HttpContext.Current.Request.Headers["HTTP_X_FORWARDED_FOR"];

}

if(string.IsNullOrEmpty(result)){

result = System.Web.HttpContext.Current.Request.Headers["HTTP_VIA"];

}

if(string.IsNullOrEmpty(result)){

result = System.Web.HttpContext.Current.Request.Headers["REMOTE_ADDR"];

}

if(string.IsNullOrEmpty(result)||!IsIp(result)){

result = "127.0.0.1";

}

return result;

}

/// <summary>

///是否为ip

/// </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?)$");

}