python 检测nginx状态，若无法访问发邮件通知

应用场景:用来检测网站可用性，访问失败，则发邮件通知

#!/usr/bin/env python
import urllib2,time,smtplib,string,logging
from conf import *

logging.basicConfig(level=logging.DEBUG,
                    format='%(asctime)s %(filename)s[line:%(lineno)d] %(levelname)s %(message)s',
                    datefmt='%a, %d %b %Y %H:%M:%S',
                    filename='/var/log/status.log',
                    filemode='a')

def send_mail(name,url):
    HOST = "smtp.126.com"
    SUBJECT = name + " " + url + " " + "Domain name cannot be accessed"
    TO = "[e-mail]"
    FROM = "[e-mail]"
    text = name + " " + url
    BODY = string.join((
        "From: %s" % FROM,
        "To: %s" % TO,
        "Subject: %s" % SUBJECT,
        "",
        text
    ),"\r\n")

    #server = smtplib.SMTP()
    #server.connect(HOST,"465")
    #server.starttls()
    server = smtplib.SMTP_SSL(HOST,"")
    server.set_debuglevel(True)
    logging.info(server.ehlo())
    server.login("[e-mail]","password")
    server.sendmail(FROM,[TO],BODY)
    server.quit()

def show_status(key,url):
    try:
        req = urllib2.Request(url)
        req.add_header('Referer', url)
        req.add_header('User-Agent','Mozilla/5.0 (iPhone; CPU iPhone OS 10_0_2 like Mac OS X) AppleWebKit/602.1.50 (KHTML, like Gecko) Version/10.0 Mobile/14A456 Safari/602.1',)  #目标网站是手机h5，所以请求头模拟手机浏览器
        response = urllib2.urlopen(req).code
    except urllib2.URLError,e:
        send_mail(key,url[7:]) #发送邮件内容不能包含http，所以从http后面开始截取邮件内容
        logging.warning(e)  #打印错误日志到文件中

def main():
    for (key,url) in info['host']['all_url'].items():
        show_status(key, url)
        time.sleep(2)

if __name__=="__main__":
    main()