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asp.net/C#讀取純真IP數據庫
C#讀取純真IP數據庫
免費下載地址：https://download.csdn.net/detail/virone/4568159
using System;
免費下載地址：https://download.csdn.net/detail/virone/4568159
using System;
using System.Collections.Generic;
using System.Text;
using System.IO;
namespace 純真IP數據庫研究
{
///<summary>
/// 提供從純真IP數據庫搜索IP信息的方法；
/// 感謝LumaQQ提供純真IP數據庫格式文檔；
///</summary>
public class
IPSearch
{
FileStream ipFile;
long ip;
string ipfilePath;
///<summary>
/// 構造函數
///</summary>
///<param name="ipfilePath">純真IP數據庫路徑</param>
public IPSearch(string ipfilePath)
{
this.ipfilePath = ipfilePath;
}
//測試
static
void Main(string[] args)
{
string ipfilePath = @"C:/Documents and Settings/Daode/桌麵/qqwry/QQWry.dat";
IPSearch ipSearch = new
IPSearch(ipfilePath);
string ip = "72.51.27.51";
IPSearch.IPLocation loc = ipSearch.GetIPLocation(ip);
Console.WriteLine("你查的ip是：{0} 地理位置：{1} {2}", ip, loc.country, loc.area);
Console.ReadKey();
}
///<summary>
/// 地理位置,包括國家和地區
///</summary>
public struct
IPLocation
{
public string country, area;
}
///<summary>
/// 獲取指定IP所在地理位置
///</summary>
///<param name="strIP">要查詢的IP地址</param>
///<returns></returns>
public
IPLocation GetIPLocation(string strIP)
{
ip = IPToLong(strIP);
ipFile =
new FileStream(ipfilePath,
FileMode.Open, FileAccess.Read);
long[] ipArray = BlockToArray(ReadIPBlock());
long offset = SearchIP(ipArray, 0, ipArray.Length - 1) * 7 + 4;
ipFile.Position += offset;//跳過起始IP
ipFile.Position = ReadLongX(3) + 4;//跳過結束IP
IPLocation loc = new
IPLocation();
int flag = ipFile.ReadByte();//讀取標誌
if (flag == 1)//表示國家和地區被轉向
{
ipFile.Position = ReadLongX(3);
flag = ipFile.ReadByte();//再讀標誌
}
long countryOffset = ipFile.Position;
loc.country = ReadString(flag);
if (flag == 2)
{
ipFile.Position = countryOffset + 3;
}
flag = ipFile.ReadByte();
loc.area = ReadString(flag);
ipFile.Close();
ipFile =
null;
return loc;
}
///<summary>
/// 將字符串形式的IP轉換位long
///</summary>
///<param name="strIP"></param>
///<returns></returns>
public
long IPToLong(string strIP)
{
byte[] ip_bytes = new
byte[8];
string[] strArr = strIP.Split(new
char[] { '.' });
for (int i = 0; i < 4; i++)
{
ip_bytes[i] =
byte.Parse(strArr[3 - i]);
}
return BitConverter.ToInt64(ip_bytes, 0);
}
///<summary>
/// 將索引區字節塊中的起始IP轉換成Long數組
///</summary>
///<param name="ipBlock"></param>
long[] BlockToArray(byte[] ipBlock)
{
long[] ipArray = new
long[ipBlock.Length / 7];
int ipIndex = 0;
byte[] temp = new
byte[8];
for (int i = 0; i < ipBlock.Length; i += 7)
{
Array.Copy(ipBlock, i, temp, 0, 4);
ipArray[ipIndex] =
BitConverter.ToInt64(temp, 0);
ipIndex++;
}
return ipArray;
}
///<summary>
/// 從IP數組中搜索指定IP並返回其索引
///</summary>
///<param name="ipArray">IP數組</param>
///<param name="start">指定搜索的起始位置</param>
///<param name="end">指定搜索的結束位置</param>
///<returns></returns>
int SearchIP(long[] ipArray,
int start, int end)
{
int middle = (start + end) / 2;
if (middle == start)
return middle;
else if (ip < ipArray[middle])
return SearchIP(ipArray, start, middle);
else
return SearchIP(ipArray, middle, end);
}
///<summary>
/// 讀取IP文件中索引區塊
///</summary>
///<returns></returns>
byte[] ReadIPBlock()
{
long startPosition = ReadLongX(4);
long endPosition = ReadLongX(4);
long count = (endPosition - startPosition) / 7 + 1;//總記錄數
ipFile.Position = startPosition;
byte[] ipBlock = new
byte[count * 7];
ipFile.Read(ipBlock, 0, ipBlock.Length);
ipFile.Position = startPosition;
return ipBlock;
}
///<summary>
/// 從IP文件中讀取指定字節並轉換位long
///</summary>
///<param name="bytesCount">需要轉換的字節數，主意不要超過8字節</param>
///<returns></returns>
long ReadLongX(int bytesCount)
{
byte[] _bytes = new
byte[8];
ipFile.Read(_bytes, 0, bytesCount);
return BitConverter.ToInt64(_bytes, 0);
}
///<summary>
/// 從IP文件中讀取字符串
///</summary>
///<param name="flag">轉向標誌</param>
///<returns></returns>
string ReadString(int flag)
{
if (flag == 1 || flag == 2)//轉向標誌
ipFile.Position = ReadLongX(3);
else
ipFile.Position -= 1;
List<byte> list =
new List<byte>();
byte b = (byte)ipFile.ReadByte();
while (b > 0)
{
list.Add(b);
b = (byte)ipFile.ReadByte();
}
return Encoding.Default.GetString(list.ToArray());
}
}
}
最後更新：2017-04-02 15:28:25