#!/usr/bin/python2.7
# -*- encoding: utf-8 -*-
import difflib ##用于文件比较的库
import sys
import smtplib
import getpass
from os.path import getsize
from email.MIMEText import MIMEText
#检查文件的大小是否相同
def check_files_size(file1, file2):
  size1 = getsize(file1)
  size2 = getsize(file2)
  if int(size1) != int(size2):
  return True
#比较文件的内容，并且声称HTML页面
def files_compare(file1, file2):
  text1_lines = file1.splitlines()
  text2_lines = file2.splitlines()
  d = difflib.HtmlDiff()
  msg = d.make_file(text1_lines, text2_lines)
  return msg
#邮件报警，使用Linux自带的postfix发送邮件
def alert_by_email(subject, msg, mailto):
  senduser = getpass.getuser()###获取当前Linux登录的用户
  smail = smtplib.SMTP('127.0.0.1')
  #smail.set_debuglevel(1) ##设置为调试模式，可以看到邮件发送的过程和成功与否
  message = MIMEText(msg, 'html', _charset='utf-8')
  message['From'] = senduser
  message['To'] = mailto
  message['Subject'] = subject
  smail.sendmail('root@localhost', mailto, message.as_string())
  smail.quit()
if __name__ == '__main__':
  reload(sys)
  sys.setdefaultencoding('utf-8')#设置编码为utf-8
  file1 = '/home/*/nginx1/nginx.conf'
  file2 = '/home/*/nginx2/nginx.conf'
  mailto = '***@***' #发送到你想要接收的邮箱地址
  subject = u'nginx配置文件监控' #邮件主题
  if check_files_size(file1, file2) == True: #如果两个文件大小不同，就进行文件内容比较，发送邮件报警
  with open(file1) as f:
    text1 = f.read().strip()
  with open(file2) as f:
    text2 = f.read().strip()
  msg = files_compare(text1, text2)
  alert_by_email(subject, msg, mailto)
  else:
  sys.exit(0)