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);
}
}
}
}
}
使用：
QQWry.NET.QQWryLocator qqWry = new QQWry.NET.QQWryLocator(Server.MapPath("QQWry.Dat"));
QQWry.NET.IPLocation ip = qqWry.Query("120.67.217.7");
Response.Write(ip.IP + "<br />");
Response.Write(ip.Country + "<br />");
Response.Write(ip.Local);
结果：
