Python 爬虫练习(三) 利用百度进行子域名收集

不多介绍了，千篇一律的正则匹配.....

import requests
import re

head = {'User-Agent': \
            'Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/43.0.2357.130 Safari/537.36'}
key = 'jcrcw.com'  # 这里填主域名
lst = []

match = 'style="text-decoration:none;">(.*?)</b>'

for i in range(1, 20):  # 1-19页
    url = "https://www.baidu.com/s?wd=inurl:{}&pn={}&oq={}&ie=utf-8".format(key, i, key)
    print(url)
    # response = requests.get(url,headers=head,cookies = cook).content
    response = requests.get(url, headers=head).content
    subdomains = re.findall(match, response.decode())
    for j in subdomains:
        j = j.replace('<b>', '')
        if key in j:
            if j not in lst:
                lst.append(j)
                # print(lst)
print(lst)

　　运行结果：