Pac for domestic ip in PKU

pku-pac.py

#!/usr/bin/env python

import re
from urllib.request import urlopen

url = 'https://its.pku.edu.cn/oper/liebiao.jsp'
with urlopen(url) as response:
    the_page = response.read().decode('gbk')

loc1 = the_page.find('netmask')
loc1 += 7
while not the_page[loc1].isdigit():
    loc1 += 1
loc2 = the_page.find('</pre>')
addresses = the_page[loc1:loc2]
addrlist = addresses.split('\n')

with open('cernet.pac', 'w') as f:
    f.write('''function FindProxyForURL(url, host)
{
if( isPlainHostName(host) || !isResolvable(host) ) return "DIRECT";
rip=dnsResolve(host);
if( isInNet(rip,"127.0.0.0","255.0.0.0") ||
''')

    rule = re.compile(r'^\s*(?P<netnum>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s*(?P<hostbits>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s*(?P<netmark>\d{1,3}\.\d{1,3}\.\d{1,3}\.\d{1,3})\s*')
    for line in addrlist:
        matchlist = rule.search(line)
        if(len(line) == 0):
            continue
        line4write = 'isInNet(rip,\"%s\",\"%s\") ||\n' % (matchlist.group('netnum'), matchlist.group('netmark'))
        f.write(line4write)

    f.write('''(shExpMatch(host, "*qq.com")) ||
(shExpMatch(host, "*taobao.com")) )return "DIRECT";
else return "PROXY 127.0.0.1:8087; DIRECT";
}
''')