python练习题（四）

写一个脚本，判断本机的80端口是否开启着，如果开启着什么都不做，如果发现端口不存在，那么重启一下httpd服务，并发邮件通知你自己。脚本写好后，可以每一分钟执行一次，也可以写一个死循环的脚本，30s检测一次。

#!/usr/bin/env python
#!coding=utf-8
import os
import time
import sys
import smtplib
from email.mime.text import MIMEText
from email.MIMEMultipart import MIMEMultipart

def sendsimplemail (warning):
msg = MIMEText(warning)
msg['Subject'] = 'python first mail'
msg['From'] = 'root@localhost'
try:
smtp = smtplib.SMTP()
smtp.connect(r'smtp.126.com')
smtp.login('要发送的邮箱名', '密码')
smtp.sendmail('要发送的邮箱名', ['要发送的邮箱名'], msg.as_string())
smtp.close()
except Exception, e:
print e

while True:
http_status = os.popen('netstat -tulnp | grep httpd','r').readlines()
try:
if http_status == []:
os.system('service httpd start')
new_http_status = os.popen('netstat -tulnp | grep httpd','r').readlines()
str1 = ''.join(new_http_status)
is_80 = str1.split()[3].split(':')[-1]
if is_80 != '80':
print 'httpd 启动失败'
else:
print 'httpd 启动成功'
sendsimplemail(warning = "This is a warning!!!")
else:
print 'httpd正常'
time.sleep(5)
except KeyboardInterrupt:
sys.exit('\n')