012_py之证书过期监测及域名使用的py列表的并集差集交集

一、由于线上域名证书快要过期,需要进行监测,顾写了一个方法用于线上证书过期监测,如下:

import ssl,socket,pprint

def check_domain_sslexpired(domain):
    context = ssl.create_default_context()
    context.verify_mode = ssl.CERT_REQUIRED
    context.check_hostname = True
    context.load_verify_locations("/private/tmp/creditupdate/jyall.crt")
    conn = context.wrap_socket(socket.socket(socket.AF_INET), server_hostname=domain)
    conn.connect((domain, 443))
    cert = conn.getpeercert()
    return '{0}	{1}	{2}'.format(domain, cert['issuer'][2][0][1], cert['notAfter'])

def main():
    print check_domain_sslexpired("www.jyall.com")
if __name__ == '__main__':
    main()

输出=>

www.jyall.com	GlobalSign Organization Validation CA - SHA256 - G2	Apr 11 05:16:03 2019 GMT

二、由于域名数量特别地多,所以需要使用集合进行对已经更新的和未更新的域名进行统计

#!/usr/bin/env python
#coding:utf-8

def diff(listA,listB):
    #求交集的两种方式
    retA = [i for i in listA if i in listB]
    retB = list(set(listA).intersection(set(listB)))

    print "retA is: ",retA
    print "retB is: ",retB

    #求并集
    retC = list(set(listA).union(set(listB)))
    print "retC1 is: ",retC

    #求差集，在B中但不在A中
    retD = list(set(listB).difference(set(listA)))
    print "retD is: ",retD

    retE = [i for i in listB if i not in listA]
    print "retE is: ",retE

def main():
    listA = [1,2,3,4,5]
    listA1 = [3,4,5]
    listB = [3,4,5,6,7]
    diff(listA,listB)

if __name__ == '__main__':
    main()

输出:

retA is:  [3, 4, 5]
retB is:  [3, 4, 5]
retC1 is:  [1, 2, 3, 4, 5, 6, 7]
retD is:  [6, 7]
retE is:  [6, 7]