python3练习-发送IP地址到邮箱

时间：2024-01-19 15:51:58
需求：

从外网通过VPN访问内网，并登录电脑A。在电脑A通过共享文件夹（需要\\IP的方式访问）访问到内网电脑B，由于电脑B的WI-FI的IP地址会变化，所以当电脑B的I访问路径需要获知电脑B的最新IP
import socket
import smtplib
import json
from email.header import Header
from email.mime.text import MIMEText
from email.utils import parseaddr, formataddr
import threading

now_ip = ""
mail_param_json = ""
# 内网B为win7操作系统，内网IP以10开头，取WIFI-IP

def _get_ip_win():

    ips = socket.gethostbyname_ex(socket.gethostname())

    for s in ips[2]:

        if s.startswith(''):

            return s
#发送邮件到指定的邮箱

#配置文件为json字符串：'{"from_addr": "", "password": "", "to_addr": "", "smtp_server":""}'

def _format_addr(s):

    name, addr = parseaddr(s)

    return formataddr((Header(name, 'utf-8').encode(), addr))

def send_mail(json_param_str=None):

    if json_param_str != None and isinstance(json_param_str, str):

        e_param = json.loads(json_param_str)

        from_addr = e_param.get('from_addr')

        password = e_param.get('password')

        to_addr = e_param.get('to_addr')

        smtp_server = e_param.get('smtp_server')

        msg = MIMEText('ip address changed to : ' + _get_ip_win() + '\r\n', 'plain', 'utf-8')

        msg['From'] = _format_addr('Reboot <%s>' % from_addr)

        msg['To'] = _format_addr('Reboot <%s>' % to_addr)

        msg['Subject'] = Header('NOTICE!!!--PC IP CHANGED', 'utf-8').encode()

        server = smtplib.SMTP(smtp_server, 25)

        server.set_debuglevel(1)

        server.login(from_addr, password)

        server.sendmail(from_addr, [to_addr], msg.as_string())

        server.quit()

    else:

        pass
#定时检查IP是否有变化

def checkIP(start_ip):

    global now_ip

    if start_ip != now_ip:

        global mail_param_json

        send_mail(mail_param_json)

        print("发送邮件,旧IP：",now_ip,"---新IP：",start_ip)

        now_ip = start_ip

    else:

        print("IP地址未发生变化,旧IP：", start_ip, "---新IP：", now_ip)

    new_ip = _get_ip_win()

    t = threading.Timer(3600.0, checkIP,(new_ip,))

    t.start()
#初始化 读取配置文件

if __name__ == '__main__':

    with open('./config', 'r') as f:

        mail_param_json = f.read()

    start_ip,now_ip = _get_ip_win(),_get_ip_win()

    checkIP(start_ip)

PS:

1、仅实现的基本功能，代码不够规范

2、待修改增加log记录，配置文件写入到sqlLite中

3、方法需要重构，不灵活

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