Python 利用邮件系统完成远程控制电脑的实现（关机、重启等）

0. 我们如何通过邮件系统完成远程控制电脑（关机、重启等）？

实现思路：

需要有两个邮箱：接收指令邮箱（A）发送指令邮箱（B）

被控制的电脑（查看 A 邮箱）：
1. 每隔指定时间监听 A 邮箱 查看最近的邮件
2. 打开最近邮件，看是否是 B 邮箱地址发来的执行命令
3. 向 A 和 B 邮箱都发送 主题为：反馈 内容为：“目标计算机已收到指令！开始执行：xxx 指令！” 邮件
4. 执行指定邮箱发送的执行命令

远程人员操作：

登录 B 邮箱，向 A 邮箱发送 主题为：“目标计算机执行” 内容为：xxx指令（例如：关机）

1. 代码编写

import poplib
import smtplib
import os
import time
from email.parser import Parser
from email.header import decode_header
from email.utils import parseaddr
from email.mime.text import MIMEText
from email.header import Header

email_params = dict()
email_params['email_message'] = '反馈'
email_params['email_subject'] = '目标计算机反馈'
email_params['email_from'] = 'A邮箱'
email_params['email_user'] = 'A邮箱'
email_params['email_exec'] = 'B邮箱'
email_params['email_to'] = ['A邮箱', 'B邮箱']
email_params['email_smtp'] = 'smtp.163.com'
email_params['email_pop'] = 'pop.163.com'
email_params['email_pass'] = 'A邮箱的密码（smtp、pop3的密码）'
interval_time = 5

def decode_str(s):
  value, charset = decode_header(s)[0]
  if charset:
    value = value.decode(charset)
  return value

def get_headers(message):
  headers = dict()
  for header in ['From', 'To', 'Subject']:
    value = message.get(header, '')
    if value:
      if header == 'Subject':
        headers['Subject'] = decode_str(value)
      elif header == 'From':
        hdr, addr = parseaddr(value)
        headers['From'] = decode_str(addr)
      elif header == 'To':
        hdr, addr = parseaddr(value)
        headers['To'] = decode_str(addr)
  return headers

def guess_charset(message):
  charset = message.get_charset()
  if charset is None:
    content_type = message.get('Content-Type', '').lower()
    pos = content_type.find('charset=')
    if pos >= 0:
      charset = content_type[pos + 8:].strip()
  return charset

def get_content(message):
  for part in message.walk():
    content_type = part.get_content_type()
    charset = guess_charset(part)
    if content_type == 'text/plain' and charset:
      try:
        return part.get_payload(decode=True).decode(charset)
      except AttributeError:
        print('type error')
      except LookupError:
        print("unknown encoding: utf-8")

def receive_email():
  email_server = poplib.POP3_SSL(email_params['email_pop'])
  email_server.user(email_params['email_user'])
  email_server.pass_(email_params['email_pass'])
  resp, mails, octets = email_server.list()
  index = len(mails)
  if index == 0:
    return None, None
  resp, lines, octets = email_server.retr(index)
  message = b'\r\n'.join(lines).decode('utf-8', 'ignore')
  message = Parser().parsestr(message)
  email_server.quit()
  return get_headers(message), get_content(message)

def send_email(email_message):
  message = MIMEText(email_message, 'plain', 'utf-8')
  message['Subject'] = Header(email_params['email_subject'], 'utf-8')
  message['From'] = Header(email_params['email_from'])
  message['To'] = Header(','.join(email_params['email_to']), 'utf-8')

  email_server = smtplib.SMTP_SSL(email_params['email_smtp'])
  email_server.login(email_params['email_from'], email_params['email_pass'])
  email_server.sendmail(email_params['email_from'], email_params['email_to'], message.as_string())
  email_server.close()

def exec_operator(exec_content):
  if exec_content == '关机':
    os.system("shutdown -s -t 1")
  elif exec_content == '重启':
    os.system("shutdown -r")
  else:
    os.system(exec_content)

if __name__ == '__main__':
  while True:
    headers, content = receive_email()
    if headers and content and headers['From'] == email_params['email_exec'] and headers['Subject'] == '目标计算机执行':
      email_message = "目标计算机已接收到指令！开始执行: " + content + " 指令！"
      send_email(email_message)
      exec_operator(content)
    time.sleep(interval_time)

2. 解释说明

A 邮箱：是 163 邮箱，需要开启 smtp、pop3 服务

上面所说的 smtp、pop3 密码，指的是开启上图所示的服务要设定的密码！！！

B 邮箱：是 QQ 邮箱，只是用来发送执行命令到 A 邮箱的，所以不必开启 smtp、pop2 服务

3. 运行截图

B 邮箱向 A 邮箱发送命令 👇

B 邮箱从 A 邮箱接收到的反馈邮件 👇

至于关机的画面，就不展示了，大家自己运行后尝试看吧！(*^_^*)

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