/// <summary>
/// 查找指定IP位置
/// </summary>
/// <param name="ip"></param>
/// <returns></returns>
public static Location GetLocation(string ip = "")
{
if (ip.IsNullOrEmpty())
{
ip = Req.GetIP();
}
if (data == null)
{
using (var fs = new FileStream(File, FileMode.Open, FileAccess.Read, FileShare.Read))
{
data = new byte[fs.Length];
fs.Read(data, 0, data.Length);
}
var buffer = new byte[8];
Array.Copy(data, 0, buffer, 0, 8);
firstStartIpOffset = ((buffer[0] + (buffer[1] * 0x100)) + ((buffer[2] * 0x100) * 0x100)) +
(((buffer[3] * 0x100) * 0x100) * 0x100);
lastStartIpOffset = ((buffer[4] + (buffer[5] * 0x100)) + ((buffer[6] * 0x100) * 0x100)) +
(((buffer[7] * 0x100) * 0x100) * 0x100);
ipCount = Convert.ToInt64((((lastStartIpOffset - firstStartIpOffset)) / 7.0));
if (ipCount <= 1L)
{
throw new ArgumentException("ip FileDataError");
}
}
if (!regex.Match(ip).Success)
{
throw new ArgumentException("IP格式错误");
}
var Location = new Location {
IP = ip
};
var intIP = IpToInt(ip);
if ((intIP >= IpToInt("127.0.0.1") && (intIP <= IpToInt("127.255.255.255"))))
{
Location.Area = "本机/局域网地址";
Location.Address = "";
}
else
{
if ((((intIP >= IpToInt("0.0.0.0")) && (intIP <= IpToInt("2.255.255.255"))) ||
((intIP >= IpToInt("64.0.0.0")) && (intIP <= IpToInt("126.255.255.255")))) ||
((intIP >= IpToInt("58.0.0.0")) && (intIP <= IpToInt("60.255.255.255"))))
{
Location.Area = "网络保留地址";
Location.Address = "";
}
}
var right = ipCount;
var left = 0L;
var startIp = 0L;
var endIpOff = 0L;
var endIp = 0L;
var countryFlag = 0;
while (left < (right - 1L))
{
var middle = (right + left) / 2L;
startIp = GetStartIp(middle, out endIpOff);
if (intIP == startIp)
{
left = middle;
break;
}
if (intIP > startIp)
{
left = middle;
}
else
{
right = middle;
}
}
startIp = GetStartIp(left, out endIpOff);
endIp = GetEndIp(endIpOff, out countryFlag);
if ((startIp <= intIP) && (endIp >= intIP))
{
string local;
Location.Area = GetCountry(endIpOff, countryFlag, out local);
Location.Address = local;
}
else
{
Location.Area = "未知";
Location.Address = "";
}
Location.Address = Location.Address.Replace("CZ88.NET", "", RegexOptions.IgnoreCase);
return(Location);
}
/// <summary>
/// 获取IP地址位置
/// </summary>
/// <param name="province">返回省份</param>
/// <param name="city">返回城市</param>
public static string GetAddress(out string province, out string city)
{
return(GetAddress(Req.GetIP(), out province, out city));
}
