如何检测域名

nslookup example.com
dig example.com

import dns.resolver
import requests

def check_dns(domain):
    try:
        answers = dns.resolver.resolve(domain, 'A')
        for rdata in answers:
            print(f'DNS A record: {rdata}')
    except dns.resolver.NXDOMAIN:
        print(f'Domain {domain} does not exist.')
    except dns.resolver.NoAnswer:
        print(f'Domain {domain} has no A records.')
    except dns.resolver.Timeout:
        print(f'Timeout while resolving {domain}.')

def check_server(domain):
    try:
        response = requests.get(f'http://{domain}')
        print(f'Server response: {response.status_code}')
    except requests.exceptions.RequestException as e:
        print(f'Error accessing {domain}: {e}')

if __name__ == '__main__':
    domain = 'example.com'
    check_dns(domain)
    check_server(domain)