/// <inheritdoc />
/// <summary>
/// 获取指定IP所在地理位置
/// </summary>
/// <param name="strIp">要查询的IP地址</param>
/// <returns></returns>
public virtual IpLocation GetIpLocation(string strIp)
{
var loc = new IpLocation
{
Ip = strIp
};
if (!CheckIp(strIp))
{
return(loc);
}
var ip = IpToLong(strIp);
if (ip == IpToLong("127.0.0.1"))
{
loc.Country = "本机内部环回地址";
loc.Area = string.Empty;
return(loc);
}
if (!Init())
{
return(loc);
}
return(ReadLocation(loc, ip, _startPosition, _ipIndexCache, _qqwryDbBytes));
}
/// <inheritdoc />
/// <summary>
/// 获取指定IP所在地理位置
/// </summary>
/// <param name="strIp">要查询的IP地址</param>
/// <param name="token"></param>
/// <returns></returns>
public virtual async Task <IpLocation> GetIpLocationAsync(string strIp, CancellationToken token = default(CancellationToken))
{
var loc = new IpLocation
{
Ip = strIp
};
if (!CheckIp(strIp))
{
return(loc);
}
long ip = IpToLong(strIp);
if (ip == IpToLong("127.0.0.1"))
{
loc.Country = "本机内部环回地址";
loc.Area = string.Empty;
return(loc);
}
if (!await InitAsync(false, token))
{
return(loc);
}
return(ReadLocation(loc, ip, _startPosition, _ipIndexCache, _qqwryDbBytes));
}
private static IpLocation ReadLocation(IpLocation loc, long ip, long startPosition, long[] ipIndex, byte[] qqwryDbBytes)
{
long offset = SearchIp(ip, ipIndex, 0, ipIndex.Length) * 7 + 4;
//偏移
var arrayOffset = startPosition + offset;
//跳过结束IP
arrayOffset = ReadLongX(qqwryDbBytes, arrayOffset, 3) + 4;
//读取标志
var flag = qqwryDbBytes[arrayOffset];
arrayOffset += 1;
//表示国家和地区被转向
if (flag == 1)
{
arrayOffset = ReadLongX(qqwryDbBytes, arrayOffset, 3);
//再读标志
flag = qqwryDbBytes[arrayOffset];
arrayOffset += 1;
}
var countryOffset = arrayOffset;
loc.Country = ReadString(qqwryDbBytes, flag, ref arrayOffset);
if (flag == 2)
{
arrayOffset = countryOffset + 3;
}
flag = qqwryDbBytes[arrayOffset];
arrayOffset += 1;
loc.Area = ReadString(qqwryDbBytes, flag, ref arrayOffset);
if (" CZ88.NET".Equals(loc.Area, StringComparison.CurrentCultureIgnoreCase))
{
loc.Area = string.Empty;
}
return(loc);
}
///<summary>
///取得具体信息
///</summary>
///<param name="offset"></param>
///<returns></returns>
private IpLocation getIPLocation(IpLocation loc, IpDbAccessor ipFile, long offset)
{
ipFile.Position = offset + 4;
//读取第一个字节判断是否是标志字节
byte one = (byte)ipFile.ReadByte();
if (one == REDIRECT_MODE_1)
{
//第一种模式
//读取国家偏移
long countryOffset = ReadLongX(ipFile, 3);//readLong3();
//转至偏移处
ipFile.Position = countryOffset;
//再次检查标志字节
byte b = (byte)ipFile.ReadByte();
if (b == REDIRECT_MODE_2)
{
loc.Country = readString(ipFile, ReadLongX(ipFile, 3));//readString(readLong3());
ipFile.Position = countryOffset + 4;
}
else
{
loc.Country = readString(ipFile, countryOffset);
}
//读取地区标志
loc.Area = readArea(ipFile, ipFile.Position);
}
else if (one == REDIRECT_MODE_2)
{
//第二种模式
loc.Country = readString(ipFile, ReadLongX(ipFile, 3));//readString(readLong3());
loc.Area = readArea(ipFile, offset + 8);
}
else
{
//普通模式
loc.Country = readString(ipFile, --ipFile.Position);
loc.Area = readString(ipFile, ipFile.Position);
}
return(loc);
}
/// <inheritdoc />
/// <summary>
/// 获取指定IP所在地理位置
/// </summary>
/// <param name="strIp">要查询的IP地址</param>
/// <param name="token"></param>
/// <returns></returns>
public virtual async Task <IpLocation> GetIpLocationAsync(string strIp, CancellationToken token = default(CancellationToken))
{
var loc = new IpLocation
{
Ip = strIp
};
long ip = IpToLong(strIp);
if (ip == IpToLong("127.0.0.1"))
{
loc.Country = "本机内部环回地址";
loc.Area = string.Empty;
return(loc);
}
if (!await InitAsync(false, token))
{
return(loc);
}
return(ReadLocation(loc, strIp));
}
///<summary>
///搜索IP地址搜索
///</summary>
///<param name="ip"></param>
///<returns></returns>
public IpLocation ReadLocation(IpLocation loc, string ip)
{
//将字符IP转换为字节
string[] ipSp = ip.Split('.');
if (ipSp.Length != 4)
{
throw new ArgumentOutOfRangeException("不是合法的IP地址!");
}
byte[] IP = new byte[4];
for (int i = 0; i < IP.Length; i++)
{
IP[i] = (byte)(int.Parse(ipSp[i]) & 0xFF);
}
var ipFile = new IpDbAccessor(_qqwryDbBytes);
long offset = locateIP(ipFile, IP);
if (offset != -1)
{
loc = getIPLocation(loc, ipFile, offset);
}
return(loc);
}
private static IpLocation ReadLocation(IpLocation loc, long ip, long startPosition, long[] ipIndex, byte[] qqwryDbBytes)
{
long offset = SearchIp(ip, ipIndex, 0, ipIndex.Length) * 7 + 4;
using (var stream = new MemoryStream(qqwryDbBytes))
{
stream.Position = startPosition;
//跳过起始IP
stream.Position += offset;
//跳过结束IP
stream.Position = ReadLongX(stream, 3) + 4;
//读取标志
var flag = stream.ReadByte();
//表示国家和地区被转向
if (flag == 1)
{
stream.Position = ReadLongX(stream, 3);
//再读标志
flag = stream.ReadByte();
}
var countryOffset = stream.Position;
loc.Country = ReadString(stream, flag);
if (flag == 2)
{
stream.Position = countryOffset + 3;
}
flag = stream.ReadByte();
loc.Area = ReadString(stream, flag);
}
if (" CZ88.NET".Equals(loc.Area, StringComparison.CurrentCultureIgnoreCase))
{
loc.Area = string.Empty;
}
return(loc);
}
/// <inheritdoc />
/// <summary>
/// 获取指定IP所在地理位置
/// </summary>
/// <param name="strIp">要查询的IP地址</param>
/// <returns></returns>
public virtual IpLocation GetIpLocation(string strIp)
{
var loc = new IpLocation
{
Ip = strIp
};
var ip = IpToLong(strIp);
if (ip == IpToLong("127.0.0.1"))
{
loc.Country = "本机内部环回地址";
loc.Area = string.Empty;
return(loc);
}
if (!Init())
{
return(loc);
}
return(ReadLocation(loc, strIp));
}