定时获取公网ip并发送邮件提醒

前一段时间路由器刷的老毛子固件“穿透服务”中定时更新阿里DDNS失败了，用了很久第一次遇到。所以需要做个备用的措施用来实时获取公网ip信息

1、基于python实现

• 开启邮箱的SMTP功能
• 拿到授权码(不是登录密码)

#!/usr/bin/python
# -*- coding: UTF-8 -*-
import os
import re
import random
import requests
import logging
import smtplib
from email.mime.text import MIMEText
from email.header import Header
from string import Template
from email.utils import parseaddr, formataddr
# 输出日志格式
logging.basicConfig(format='%(asctime)s - %(filename)s[line:%(lineno)d] - %(levelname)s: %(message)s',
                    level=logging.INFO,
                    filename='sendWANIP.log',
                    filemode='a')
 
 
def _format_addr(s):
    """
    美化邮箱地址,用于可显示发/收件人
    :param s: 邮件地址
    :return: 美化后的地址
    """
    addr = parseaddr(s)
    return formataddr(addr)
 
def get_current_ip():
    """
    获取当前公网ip地址
    :return: 公网ip地址
    """
    ip_reg = re.compile("((2(5[0-5]|[0-4]\\d))|[0-1]?\\d{1,2})(\\.((2(5[0-5]|[0-4]\\d))|[0-1]?\\d{1,2})){3}")
    # 可根据需求增删获取ip网址
    api_tuple = (
        "http://txt.go.sohu.com/ip/soip",
        "https://ident.me/",
        "https://ifconfig.me/ip",
        "https://icanhazip.com/",
        "https://checkip.amazonaws.com/",
        "http://members.3322.org/dyndns/getip"
    )
    url = api_tuple[random.randrange(len(api_tuple))]
    # print(url)
    r = requests.get(url)
    ip = re.findall(r'\d+.\d+.\d+.\d+', r.text)
    # ip[0]
    if re.match(ip_reg,ip[0]):
        logging.info("从{}获取地址成功!ip={}".format(url,ip))
        return ip[0]
    else:
        logging.error("从{}获取地址失败!".format(url))
        exit(-1)
 
def record_ip(params):
    """
    将最新的ip记录在文件中
    :param params: 包含ip的参数
    """
    filename="./lastwanip"
    last_wan_ip=""
    if os.path.exists(filename):
        f=open(filename,'r');
        last_wan_ip=f.readline()
        f.close()
    logging.info("从文件中读到ip地址为:{}".format(last_wan_ip))
    if last_wan_ip!= params['current_ip']:
        f = open(filename, 'w');
        f.write(params['current_ip'])
        f.close()
    else:
        logging.info("ip地址已经是最新的,无需更新")
        exit(0)
def send_mail(params):
    """
    给指定用户发送邮件
    :param params: 发送邮件信息
    :return: 0: 发送成功,>0 发送失败
    """
    # 第三方 SMTP 服务
    mail_host = "smtp.163.com"  # 设置服务器
    mail_user = "xxxx"  # 用户名
    mail_pass = "xxxxxxxx"  # 口令,即授权码不是账户密码
    receivers = sender = '[email protected]'
    # 邮件内容支持html格式，仿照的腾讯云模板
    mail_text="""
    
    
    
        
        
    
    
    

        
            

                

                    

                        

                        
                            

                                

                                    

                                        

                                        

                                            

                                            

                                                

                                                    
                                                        
                                                    
                                                
                                                

                                                

                                                

                                                    

                                                        

                                                        

                                                            

                                                            

                                                                

                                                                    [DynamicIP-Notice]
                                                                
     
                                                                

                                                                    
                                                                        Your current public ip address is :
                                                                        ${current_ip}
                                                                        .
                                                                    
                                                                
     
                                                                

                                                                    

                                                                        

                                                                            Sincerely,
                                                                            

                                                                            ${device}
                                                                        
                                                                    
                                                                
                                                            
                                                            

                                                        
                                                        
                                                    
                                                
     
                                                

                                                    

                                                        

                                                        

                                                            

                                                            

                                                                

                                                                    如非本人邮件，请忽略！
                                                                
                                                            

                                                        
                                                        
                                                    
                                                
                                            
                                            

                                        
                                        
                                    
                                
                            
                        
                    
                
            
        
    
     
    
    
    """
    mail = MIMEText(Template(mail_text).substitute(params), 'html', 'utf-8')
    # 显示发件人
    mail['From'] = _format_addr(sender)
    mail['To'] = _format_addr(receivers)
    # 设置邮件主题
    subject = '[DynamicIP-Notice] {}'.format(params['current_ip'])
    mail['Subject'] = Header(subject, 'utf-8')
 
    try:
        smtpObj = smtplib.SMTP()
        smtpObj.connect(mail_host, 25)  # 25 为 SMTP 端口号
        smtpObj.login(mail_user, mail_pass)
        smtpObj.sendmail(sender, receivers, mail.as_string())
        logging.info("邮件发送成功,最新ip为{}".format(params['current_ip']))
        return 0
    except smtplib.SMTPException as ex:
        logging.error("邮件发送失败{},".format(ex))
        return 1
 
if __name__=='__main__':
    device = os.environ['COMPUTERNAME']
    params = {"current_ip": get_current_ip(), "device": device}
    record_ip(params)
    send_mail(params)

2、创建bat文件启动脚本

"D:\Program Files\Python310\python.exe" D:\Code\Code\sendWANIP\sendWANIP.py

3、Windows任务计划

添加windows任务计划，每隔10分钟执行bat文件获取公网ip
注意：

• “程序或脚本”中写的可执行文件不要被引号包裹
• 起始位置必填，为可执行文件所在的目录否则无法执行

4、shell脚本

路由器上跑的shell脚本，百度得来的出处忘记了，有需要的可以参考

#!/bin/bash
 
#SMTP配置   #（例子）
#SMTP服务器#smtpserver=smtp.126.com
#邮箱账号#[email protected]
#邮箱密码fromaddresspwd=xxxxxxxxxxxxx
#收件人信息#[email protected] 英文逗号分隔
 
 
 
#SMTP配置
smtpserver=smtp.163.com
[email protected]
fromaddresspwd=xxxxxxxxxxxxx
[email protected]
 
 
 
#文件路径，最新ip写入lastwanip.txt 
iptxt="/etc/storage/lastwanip.txt"
#文件路径，邮件正文，写入mail文件
mailtxtpath="/etc/storage/mail.txt"
 
 
 
 
#获取WANIP接口
newwanip=`wget http://members.3322.org/dyndns/getip -q -O -`
 
 
 
 
#如接口获取不到ip，本次取消发送
echo $newwanip
 
if [ x"$newwanip" = "x" ]; then
  newwanip=`wget https://ifconfig.me/ip -q -O -`
  echo $newwanip
  if [ x"$newwanip" = "x" ]; then
    exit
  fi
fi
 
if [ -f $iptxt ]; then
  oldwanip=`cat $iptxt`
else
  oldwanip="0.0.0.0"
fi
 
 
 
 
 
#对比上次IP，如相同则不发邮件，否则发送
echo $oldwanip
 
if [ "$newwanip" = "$oldwanip" ]; then
  exit
fi
if [ -f $mailtxtpath ]; then
  rm -f $mailtxtpath
fi
 
 
 
 
 
#配置邮件标题，修改“wanip”和在${newwanip} 后面加参数
#不能修改代码格式，行与行之间必须空格！
cat  <>$mailtxtpath
Subject: WANIP:[ ${newwanip} ]
 
路由器型号 = RedMi AC2100
 
IP=    ${newwanip}
 
ok
 
To: $toaddress
From: $fromaddress
EOF
 
 
 
 
 
#调用系统邮件服务
sendmail -f $fromaddress -t $toaddress -S $smtpserver -au$fromaddress -ap$fromaddresspwd < $mailtxtpath
 
 
 
 
#缓存最新ip地址，写入/etc/storage/lastwanip.txt"
echo $newwanip > $iptxt
 
 
 
 
#打印系统日志，调用logger接口
logger 发现WANIP变化，外网IP= $newwanip 
logger （$fromaddress）已邮件通知（$toaddress）