python3 批量查询域名A记录 & CNAME

场景：需要批量查询域名信息

需要生成一个 domain_in.txt的文件
文件内容格式（尾行不可有空行）：

baidu.com
bilibili.com

代码

import random
import string
from dns.resolver import Resolver
import requests
import socket
from parsel import Selector

"""
# python3
pip install dnspython3
pip install lxml
pip install requests
pip install parsel
"""

dns_resolver = Resolver()
dns_resolver.nameservers = ["8.8.8.8", "8.8.4.4"]


def get_ip_from_domain(domain):
    domain = domain.lower().strip()
    try:
        return dns_resolver.query(domain, \'CNAME\')[0].to_text()
    except Exception:
        return str(None)


def open_domainlist(filename):
    with open(filename, encoding="utf-8") as f:
        return f.readlines()


def get_whoisname(domainwhois):
    requests_data = {
        "domain": str(domainwhois),
        "type": \'true\',
        "standard": \'true\'
    }
    url = \'https://api.devopsclub.cn/api/whoisquery\'
    get_whoisnames = requests.get(url=url, params=requests_data).json()
    return get_whoisnames


def for_domainlist(domainnamess):
    for domain_one in domainnamess:
        # 组合
        domain_one_n = domain_one.strip(\'\n\')
        www_domain = \'www\' + \'.\' + domain_one_n
        # 打印
        print(domain_one_n + \' 域名解析检查: \')
        whois_xpath(domain_one_n)
        get_domain_ip(domain_one_n)
        get_domain_or_ip(\'www\', domain_one_n)
        print(www_domain + \' CNAME = \' + get_ip_from_domain(www_domain))
        print(\'-\' * 30)


def whois_xpath(whois_name):
    # 获取返回响应的html文件
    url = \'https://who.is/whois/\' + whois_name

    headers = {
        \'User-Agent\': \'Mozilla/5.0 (Windows NT 10.0; Win64; x64) \'
                      \'AppleWebKit/537.36 (KHTML, like Gecko) \'
                      \'Chrome/84.0.4147.125 Safari/537.36 Edg/84.0.522.61\'
    }
    selector = Selector(text=requests.post(url=url, headers=headers, timeout=600).text)
    select_url = selector.xpath(\'/html/body/div[3]/div[2]/div[5]/div[1]/div[3]/div/div[3]/div[2]/text()\').extract_first()
    print(select_url)


def get_domain_ip(domain):
    try:
        myaddr = socket.getaddrinfo(domain, \'http\')
        print(\'顶级域名解析值： \' + domain + \' = \' + myaddr[0][4][0])
    except Exception:
        print(\'顶级域名解析不存在\')


def get_domain_or_ip(a, domain):
    try:
        domain_sub = a + \'.\' + domain
        myaddr = socket.getaddrinfo(domain_sub, \'http\')
        print(domain_sub + \' = \' + myaddr[0][4][0])
    except Exception:
        print(\'解析\' + a + \'不存在\')


if __name__ == \'__main__\':
    # input(\'确认相对路径存在 domain_in.txt /  <Enter>\')
    DomainNames = open_domainlist(\'domain_in.txt\')
    for_domainlist(DomainNames)
    # input(\'Press <Enter>\')