【asp】asp.net 纯真ip库取得所在地实现代码-net-纯真ip

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asp.net 纯真ip库取得所在地实现代码

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;

namespace QQWry.NET
{

public class IPLocation
{
private string _IP;
private string _Country;
private string _Local;
public string IP
{ get{return _IP;}
set{_IP=value;}
}
public string Country
{ get{return _Country;}
set{_Country=value;}
}
public string Local
{ get{return _Local;}
set{_Local=value;}
}
}
public class QQWryLocator
{
private byte[] data;
Regex regex=new Regex(@"(((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))\.){3}((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))");
long firstStartIpOffset;
long lastStartIpOffset;
long ipCount;
public long Count { get { return ipCount; } }
public QQWryLocator(string dataPath)
{
using (FileStream fs=new FileStream(dataPath, FileMode.Open, FileAccess.Read, FileShare.Read))
{
data=new byte[fs.Length];
fs.Read(data, 0, data.Length);
}
byte[] 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((double)(((double)(lastStartIpOffset - firstStartIpOffset)) / 7.0));

if (ipCount <=1L)
{
throw new ArgumentException("ip FileDataError");
}
}
private static long IpToInt(string ip)
{
char[] separator=new char[] { '.' };
if (ip.Split(separator).Length==3)
{
ip=ip + ".0";
}
string[] strArray=ip.Split(separator);
long num2=((long.Parse(strArray[0]) * 0x100L) * 0x100L) * 0x100L;
long num3=(long.Parse(strArray[1]) * 0x100L) * 0x100L;
long num4=long.Parse(strArray[2]) * 0x100L;
long num5=long.Parse(strArray[3]);
return (((num2 + num3) + num4) + num5);
}
private static string IntToIP(long ip_Int)
{
long num=(long)((ip_Int & 0xff000000L) >> 0x18);
if (num < 0L)
{
num +=0x100L;
}
long num2=(ip_Int & 0xff0000L) >> 0x10;
if (num2 < 0L)
{
num2 +=0x100L;
}
long num3=(ip_Int & 0xff00L) >> 8;
if (num3 < 0L)
{
num3 +=0x100L;
}
long num4=ip_Int & 0xffL;
if (num4 < 0L)
{
num4 +=0x100L;
}
return (num.ToString() + "." + num2.ToString() + "." + num3.ToString() + "." + num4.ToString());
}
public IPLocation Query(string ip)
{
if (!regex.Match(ip).Success)
{
throw new ArgumentException("IP格式错误");
}
IPLocation ipLocation=new IPLocation();
ipLocation.IP=ip;
long intIP=IpToInt(ip);
if ((intIP >=IpToInt("127.0.0.1") && (intIP <=IpToInt("127.255.255.255"))))
{
ipLocation.Country="本机内部环回地址";
ipLocation.Local="";
}
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"))))
{
ipLocation.Country="网络保留地址";
ipLocation.Local="";
}
}
long right=ipCount;
long left=0L;
long middle=0L;
long startIp=0L;
long endIpOff=0L;
long endIp=0L;
int countryFlag=0;
while (left < (right - 1L))
{
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;
ipLocation.Country=GetCountry(endIpOff, countryFlag, out local);
ipLocation.Local=local;
}
else
{
ipLocation.Country="未知";
ipLocation.Local="";
}
return ipLocation;
}
private long GetStartIp(long left, out long endIpOff)
{
long leftOffset=firstStartIpOffset + (left * 7L);
byte[] buffer=new byte[7];
Array.Copy(data, leftOffset, buffer, 0, 7);
endIpOff=(Convert.ToInt64(buffer[4].ToString()) + (Convert.ToInt64(buffer[5].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[6].ToString()) * 0x100L) * 0x100L);
return ((Convert.ToInt64(buffer[0].ToString()) + (Convert.ToInt64(buffer[1].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[2].ToString()) * 0x100L) * 0x100L)) + (((Convert.ToInt64(buffer[3].ToString()) * 0x100L) * 0x100L) * 0x100L);
}
private long GetEndIp(long endIpOff, out int countryFlag)
{
byte[] buffer=new byte[5];
Array.Copy(data, endIpOff, buffer, 0, 5);
countryFlag=buffer[4];
return ((Convert.ToInt64(buffer[0].ToString()) + (Convert.ToInt64(buffer[1].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[2].ToString()) * 0x100L) * 0x100L)) + (((Convert.ToInt64(buffer[3].ToString()) * 0x100L) * 0x100L) * 0x100L);
}
/// <summary>
/// Gets the country.
/// </summary>
/// <param name="endIpOff">The end ip off.</param>
/// <param name="countryFlag">The country flag.</param>
/// <param name="local">The local.</param>
/// <returns>country</returns>
private string GetCountry(long endIpOff, int countryFlag, out string local)
{
string country="";
long offset=endIpOff + 4L;
switch (countryFlag)
{
case 1:
case 2:
country=GetFlagStr(ref offset, ref countryFlag, ref endIpOff);
offset=endIpOff + 8L;
local=(1==countryFlag) ? "" : GetFlagStr(ref offset, ref countryFlag, ref endIpOff);
break;
default:
country=GetFlagStr(ref offset, ref countryFlag, ref endIpOff);
local=GetFlagStr(ref offset, ref countryFlag, ref endIpOff);
break;
}
return country;
}
private string GetFlagStr(ref long offset, ref int countryFlag, ref long endIpOff)
{
int flag=0;
byte[] buffer=new byte[3];

while (true)
{
//用于向前累加偏移量
long forwardOffset=offset;
flag=data[forwardOffset++];
//没有重定向
if (flag !=1 && flag !=2)
{
break;
}
Array.Copy(data, forwardOffset, buffer, 0, 3);
forwardOffset +=3;
if (flag==2)
{
countryFlag=2;
endIpOff=offset - 4L;
}
offset=(Convert.ToInt64(buffer[0].ToString()) + (Convert.ToInt64(buffer[1].ToString()) * 0x100L)) + ((Convert.ToInt64(buffer[2].ToString()) * 0x100L) * 0x100L);
}
if (offset < 12L)
{
return "";
}
return GetStr(ref offset);
}
private string GetStr(ref long offset)
{
byte lowByte=0;
byte highByte=0;
StringBuilder stringBuilder=new StringBuilder();
byte[] bytes=new byte[2];
Encoding encoding=Encoding.GetEncoding("GB2312");
while (true)
{
lowByte=data[offset++];
if (lowByte==0)
{
return stringBuilder.ToString();
}
if (lowByte > 0x7f)
{
highByte=data[offset++];
bytes[0]=lowByte;
bytes[1]=highByte;
if (highByte==0)
{
return stringBuilder.ToString();
}
stringBuilder.Append(encoding.GetString(bytes));
}
else
{
stringBuilder.Append((char)lowByte);
}
}
}
}
}

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