jiayouzl

Python 版我写好了
```
# -*- coding: UTF-8 -*-

import socket
import struct


class CzIp:

def __init__(self, db_file="qqwry2024-08-28.dat"): # db_file="qqwry.dat"
self.f_db = open(db_file, "rb")
bs = self.f_db.read(8)
(self.first_index, self.last_index) = struct.unpack("II", bs)
self.index_count = int((self.last_index - self.first_index) / 7 + 1)
self.cur_start_ip = None
self.cur_end_ip_offset = None
self.cur_end_ip = None
print(self.get_version(), " 记录总数: %d 条 " % (self.index_count))

def get_version(self):
"""
获取版本信息，最后一条 IP 记录 255.255.255.0-255.255.255.255 是版本信息
:return: str
"""
s = self.get_addr_by_ip(0xFFFFFF00)
return s

def _get_area_addr(self, offset=0):
if offset:
self.f_db.seek(offset)
bs = self.f_db.read(1)
(byte,) = struct.unpack("B", bs)
if byte == 0x01 or byte == 0x02:
p = self.getLong3()
if p:
return self.get_offset_string(p)
else:
return ""
else:
self.f_db.seek(-1, 1)
return self.get_offset_string(offset)

def _get_addr(self, offset):
"""
获取 offset 处记录区地址信息(包含国家和地区)
如果是中国 ip ，则是 "xx 省 xx 市 xxxxx 地区" 这样的形式
(比如:"福建省 电信", "澳大利亚 墨尔本 Goldenit 有限公司")
:param offset:
:return:str
"""
self.f_db.seek(offset + 4)
bs = self.f_db.read(1)
(byte,) = struct.unpack("B", bs)
if byte == 0x01: # 重定向模式 1
country_offset = self.getLong3()
self.f_db.seek(country_offset)
bs = self.f_db.read(1)
(b,) = struct.unpack("B", bs)
if b == 0x02:
country_addr = self.get_offset_string(self.getLong3())
self.f_db.seek(country_offset + 4)
else:
country_addr = self.get_offset_string(country_offset)
area_addr = self._get_area_addr()
elif byte == 0x02: # 重定向模式 2
country_addr = self.get_offset_string(self.getLong3())
area_addr = self._get_area_addr(offset + 8)
else: # 字符串模式
country_addr = self.get_offset_string(offset + 4)
area_addr = self._get_area_addr()
return country_addr + " " + area_addr

def dump(self, first, last):
"""
打印数据库中索引为 first 到索引为 last(不包含 last)的记录
:param first:
:param last:
:return:
"""
if last > self.index_count:
last = self.index_count
for index in range(first, last):
offset = self.first_index + index * 7
self.f_db.seek(offset)
buf = self.f_db.read(7)
(ip, of1, of2) = struct.unpack("IHB", buf)
address = self._get_addr(of1 + (of2 << 16))
print("%d %s %s" % (index, self.ip2str(ip), address))

def _set_ip_range(self, index):
offset = self.first_index + index * 7
self.f_db.seek(offset)
buf = self.f_db.read(7)
(self.cur_start_ip, of1, of2) = struct.unpack("IHB", buf)
self.cur_end_ip_offset = of1 + (of2 << 16)
self.f_db.seek(self.cur_end_ip_offset)
buf = self.f_db.read(4)
(self.cur_end_ip,) = struct.unpack("I", buf)

def get_addr_by_ip(self, ip):
"""
通过 ip 查找其地址
:param ip: (int or str)
:return: str
"""
if type(ip) == str:
ip = self.str2ip(ip)
L = 0
R = self.index_count - 1
while L < R - 1:
M = int((L + R) / 2)
self._set_ip_range(M)
if ip == self.cur_start_ip:
L = M
break
if ip > self.cur_start_ip:
L = M
else:
R = M
self._set_ip_range(L)
# version information, 255.255.255.X, urgy but useful
if ip & 0xFFFFFF00 == 0xFFFFFF00:
self._set_ip_range(R)
if self.cur_start_ip <= ip <= self.cur_end_ip:
address = self._get_addr(self.cur_end_ip_offset)
else:
address = "未找到该 IP 的地址"
return address

def get_ip_range(self, ip):
"""
返回 ip 所在记录的 IP 段
:param ip: ip(str or int)
:return: str
"""
if type(ip) == str:
ip = self.str2ip(ip)
self.get_addr_by_ip(ip)
range = self.ip2str(self.cur_start_ip) + " - " + self.ip2str(self.cur_end_ip)
return range

def get_offset_string(self, offset=0):
"""
获取文件偏移处的字符串(以'\0'结尾)
:param offset: 偏移
:return: str
"""
if offset:
self.f_db.seek(offset)
bs = b""
ch = self.f_db.read(1)
(byte,) = struct.unpack("B", ch)
while byte != 0:
bs += ch
ch = self.f_db.read(1)
(byte,) = struct.unpack("B", ch)
return bs.decode("gbk")

def ip2str(self, ip):
"""
整数 IP 转化为 IP 字符串
:param ip:
:return:
"""
return str(ip >> 24) + "." + str((ip >> 16) & 0xFF) + "." + str((ip >> 8) & 0xFF) + "." + str(ip & 0xFF)

def str2ip(self, s):
"""
IP 字符串转换为整数 IP
:param s:
:return:
"""
(ip,) = struct.unpack("I", socket.inet_aton(s))
return ((ip >> 24) & 0xFF) | ((ip & 0xFF) << 24) | ((ip >> 8) & 0xFF00) | ((ip & 0xFF00) << 8)

def getLong3(self, offset=0):
"""
3 字节的数值
:param offset:
:return:
"""
if offset:
self.f_db.seek(offset)
bs = self.f_db.read(3)
(a, b) = struct.unpack("HB", bs)
return (b << 16) + a


if __name__ == "__main__":
# todo:纯真 IP 库解析
cz = CzIp()
# print(cz.get_version())
ip = "8.8.8.8"
print(cz.get_ip_range(ip))
print(cz.get_addr_by_ip(ip))
print("====")
ip = "125.129.173.203"
print(cz.get_ip_range(ip))
print(cz.get_addr_by_ip(ip))
```