'''
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 此平臺是網路工程師個人日常技術、項目案例經驗分享，
 為鞏固及提升技術能力乃至共享所學所知技術，
 也歡迎各位工程師一起分享、一起成長。
'''

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

from netmiko import ConnectHandler
from netmiko.ssh_exception import NetMikoTimeoutException
from netmiko.ssh_exception import NetMikoAuthenticationException
from datetime import datetime
import time
import logging
from my_devices import device_list as devices

'定義類'
class SSH_Client():
 '定義login_host函數，用于登陸設備'
 def login_host(self , a_device):
  try:
   self.ssh = ConnectHandler(**a_device)
   self.ssh.enable()
   reply = self.ssh.find_prompt()
   print('>' * 10 + '成功登陸結果如下:' + '>' * 10 + '\n' + reply)
   return True
  except ValueError:
   logging.warning(a_device['host'] + ' Secret 密碼錯誤')
  except NetMikoTimeoutException:
   logging.warning(a_device['host'] + ' 連接不上設備,請檢查網絡是否正常通信')
  except NetMikoAuthenticationException:
   logging.warning(a_device['host'] + ' 登陸失敗，用戶名或密碼錯誤')

 '定義do_cmd函數,用于執行命令'
 def do_cmd(self,cmds):
  '讀取文件，for語句循環執行命令'
  with open(cmds) as cmd_obj:
   for cmd in cmd_obj:
    reply = self.ssh.send_command(cmd)
    time.sleep(2)
    logging.warning('>' * 10 + cmd.rstrip() + ' 命令執行結果如下:' + '>' * 10 + '\n' + reply)
 '定義logout_host函數，關閉程序'
 def logout_host(self):
  self.ssh.disconnect()

if __name__ == '__main__':
 cmds = 'cmd.txt' # 存放執行命令文件，相對路徑
 ssh_client = SSH_Client()
 start_time = datetime.now()
 for a_device in devices:
  '如果登錄結果為True，則執行命令，然后退出'
  if ssh_client.login_host(a_device):
   ssh_client.do_cmd(cmds)
   ssh_client.logout_host()
   time.sleep(2)
 stop_time = datetime.now()
 print('總花費時長：{0}\n'.format(stop_time - start_time))