dns-resolver.py

#!/usr/bin/env python3

# pip3 install dnspython pythonping

# github.global.ssl.fastly.net
#
# github.com
# gist.github.com
# assets-cdn.github.com
#
# githubusercontent.com
# raw.githubusercontent.com
# gist.githubusercontent.com
# camo.githubusercontent.com
# avatars.githubusercontent.com
# avatars0.githubusercontent.com
# avatars1.githubusercontent.com
# avatars2.githubusercontent.com
# avatars3.githubusercontent.com
# avatars4.githubusercontent.com
# avatars5.githubusercontent.com
# avatars6.githubusercontent.com
# avatars7.githubusercontent.com
# avatars8.githubusercontent.com
#
# github.io


import sys
import typing as t

from dns.resolver import Answer, Resolver, get_default_resolver
from dns.exception import Timeout, DNSException
from pythonping import ping


if __name__ == '__main__':
    if len(sys.argv) < 2:
        print('ERR: Url not specified!')

    ip_set: 'set[str]' = set()

    for ns in get_default_resolver().nameservers + [
            '8.8.8.8', '8.8.4.4', '9.9.9.9', '9.9.9.10', '1.1.1.1', '1.0.0.1',
            '77.88.8.8', '77.88.8.1', '208.67.222.222', '208.67.220.220',
            '208.67.222.220', '208.67.220.222', '185.121.177.177',
            '169.239.202.202', '114.114.114.114', '114.114.115.115', '223.5.5.5',
            '223.6.6.6', '199.85.126.10', '199.85.127.10', '8.26.56.26',
            '8.20.247.20', '119.29.29.29', '182.254.118.118', '180.76.76.76',
            '1.2.4.8', '210.2.4.8', '117.50.10.10', '52.80.52.52']:

        my_resolver = Resolver(configure=False)
        my_resolver.nameservers = [ns]

        try:
            answer = t.cast(Answer, my_resolver.resolve(sys.argv[1], 'a'))
            for x in answer:
                x = str(x)
                if x not in ip_set:
                    ip_set.add(x)
                    print(f'{x} \t {ping(x).rtt_avg_ms:>6.2f} ms \t from {ns}')
        except (Timeout, DNSException):
            print(f'{ns} is not available')