【网络IP】c#实现根据网络IP显示地理位置功能示例-地理位置

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c#实现根据网络IP显示地理位置功能示例

Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> 1 using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
using System.Text.RegularExpressions;
using System.Net;
using System.Net.Sockets;
namespace AjaxIP
{
public class IPLocation
{
public string IP { get; set; }
public string Country { get; set; }
public string Local { get; set; }
}
public class QQWryLocator
{
static Encoding encoding=Encoding.GetEncoding("GB2312");
private byte[] data;
int firstStartIpOffset;
int lastStartIpOffset;
int ipCount;
public int 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);
}
firstStartIpOffset=(int)data[0] + (((int)data[1]) << 8) + (((int)data[2]) << 16) + (((int)data[3]) << 24);
lastStartIpOffset=(int)data[4] + (((int)data[5]) << 8) + (((int)data[6]) << 16) + (((int)data[7]) << 24);
ipCount=(lastStartIpOffset - firstStartIpOffset) / 7 + 1;
if (ipCount <=1)
{
throw new ArgumentException("ip FileDataError");
}
}
public static uint IpToInt(string ip)
{
//string[] strArray=ip.Split('.');
//return (uint.Parse(strArray[0]) << 24) + (uint.Parse(strArray[1]) << 16) + (uint.Parse(strArray[2]) << 8) + uint.Parse(strArray[0]);
//return (uint)IPAddress.HostToNetworkOrder((int)(IPAddress.Parse(ip).Address));
byte[] bytes=IPAddress.Parse(ip).GetAddressBytes();
return (uint)bytes[3] + (((uint)bytes[2]) << 8) + (((uint)bytes[1]) << 16) + (((uint)bytes[0]) << 24);
}
public static string IntToIP(uint ip_Int)
{
return new IPAddress(ip_Int).ToString();
}
public IPLocation Query(string ip)
{
IPAddress address=IPAddress.Parse(ip);
if (address.AddressFamily !=AddressFamily.InterNetwork)
{
throw new ArgumentException("不支持非IPV4的地址");
}
if (IPAddress.IsLoopback(address))
{
return new IPLocation() { IP=ip, Country="本机内部环回地址", Local=string.Empty };
}
uint intIP=(uint)IPAddress.HostToNetworkOrder((int)address.Address);
//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"))))
//if (intIP <=50331647 || (intIP >=1073741824 && intIP <=2130706431) || (intIP >=973078528 && intIP <=1023410175))
//{
// return new IPLocation() { IP=ip, Country="网络保留地址", Local=string.Empty };
//}
IPLocation ipLocation=new IPLocation() { IP=ip };
uint right=(uint)ipCount;
uint left=0;
uint middle=0;
uint startIp=0;
uint endIpOff=0;
uint endIp=0;
int countryFlag=0;
while (left < (right - 1))
{
middle=(right + left) / 2;
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=string.Empty;
}
return ipLocation;
}
private uint GetStartIp(uint left, out uint endIpOff)
{
int leftOffset=(int)(firstStartIpOffset + (left * 7));
endIpOff=(uint)data[4 + leftOffset] + (((uint)data[5 + leftOffset]) << 8) + (((uint)data[6 + leftOffset]) << 16);
return (uint)data[leftOffset] + (((uint)data[1 + leftOffset]) << 8) + (((uint)data[2 + leftOffset]) << 16) + (((uint)data[3 + leftOffset]) << 24);
}
private uint GetEndIp(uint endIpOff, out int countryFlag)
{
countryFlag=data[4 + endIpOff];
return (uint)data[endIpOff] + (((uint)data[1 + endIpOff]) << 8) + (((uint)data[2 + endIpOff]) << 16) + (((uint)data[3 + endIpOff]) << 24);
}
/// <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(uint endIpOff, int countryFlag, out string local)
{
string country=string.Empty;
uint offset=endIpOff + 4;
switch (countryFlag)
{
case 1:
case 2:
country=GetFlagStr(ref offset, ref countryFlag, ref endIpOff);
offset=endIpOff + 8;
local=(1==countryFlag) ? string.Empty : 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 uint offset, ref int countryFlag, ref uint endIpOff)
{
int flag=0;
while (true)
{
flag=data[offset];
//没有重定向
if (flag !=1 && flag !=2)
{
break;
}
if (flag==2)
{
countryFlag=2;
endIpOff=offset - 4;
}
offset=(uint)data[1 + offset] + (((uint)data[2 + offset]) << 8) + (((uint)data[3 + offset]) << 16);
}
if (offset < 12)
{
return string.Empty;
}
return GetStr(ref offset);
}
/// <summary>
/// 读取字符串...
/// </summary>
/// <param name="offset"></param>
/// <returns></returns>
private string GetStr(ref uint offset)
{
byte lowByte=0;
byte highByte=0;
StringBuilder stringBuilder=new StringBuilder(16);
while (true)
{
lowByte=data[offset++];
if (lowByte==0)
{
return stringBuilder.ToString();
}
if (lowByte > 0x7f)
{
highByte=data[offset++];
if (highByte==0)
{
return stringBuilder.ToString();
}
stringBuilder.Append(encoding.GetString(new byte[] { lowByte, highByte }));
}
else
{
stringBuilder.Append((char)lowByte);
}
}
}
}
}

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