#-*- encoding:utf-8 -*-  

#!/usr/bin/env python   # name IsOpen.py   import os   import socket   import time   import smtplib     from email.mime.text import MIMEText     mailto_list=["rootliu@****.com"]    mail_host="smtp.****.com"  #设置服务器   mail_user="rootliu@****.com"    #用户名   mail_pass="******"   #口令    mail_postfix="****.com"  #发件箱的后缀        def send_mail(mailto_list,sub,content):  #to_list：收件人；sub：主题；content：邮件内容       me="VPN Server  is down"+"<"+mail_user+"@"+mail_postfix+">"   #这里的hello可以任意设置，收到信后，将按照设置显示       msg = MIMEText(content,_subtype='html',_charset='gb2312')    #创建一个实例，这里设置为html格式邮件       msg['Subject'] = sub    #设置主题       msg['From'] = me         msg['To'] = ";".join(mailto_list)         try:             s = smtplib.SMTP()             s.connect(mail_host)  #连接smtp服务器           s.login(mail_user,mail_pass)  #登陆服务器           s.sendmail(me, mailto_list, msg.as_string())  #发送邮件           s.close()             return True         except Exception as e:         print str(e)             return False     def IsOpen(ip,port,flag):     s = socket.socket(socket.AF_INET,socket.SOCK_STREAM)       try:           s.connect((ip,int(port)))           s.shutdown(2)           print ('%d is open'% port)           return True       except:           print ('%d is down' % port)             return False          if __name__ == '__main__':       while(1>0):           flag=1           IsOpen('127.0.0.1',80,flag)           time.sleep(5)           flag=IsOpen('127.0.0.1',80,flag)           print (flag)           if flag==False:               send_mail(mailto_list,"VPN Server is down","error")               time.sleep(5)