获取本机的公网IP

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该脚本用于获取本机外网IP地址。
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import requests
def get_public_ip():
    try:
        response = requests.get('https://api.ipify.org?format=json')
        response.raise_for_status()
        ip_info = response.json()
        return ip_info['ip']
    except requests.RequestException as e:
        print(f"Error fetching public IP: {e}")
        return None

public_ip = get_public_ip()
if public_ip:
    print(f"Public IP Address: {public_ip}")

一个实际案例来展示该工具的应用。检查本机外网IP是否发生了变化，如果发生变化，就通过邮件通知。

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<PYTHON>
import requests

# 获取当前外网 IP 地址
def get_ip():
    try:
        response = requests.get('https://api.ipify.org?format=json')
        response.raise_for_status()
        ip_info = response.json()
        return ip_info['ip']
    except requests.RequestException as e:
        print(f"Error fetching public IP: {e}")
        return None

current_ip = get_ip()

import smtplib
from email.mime.text import MIMEText
from email.header import Header

# 发件人和收件人邮箱地址
sender = "sender@example.com"
receiver = "receiver@example.com"
# 邮箱登录密码（这里使用的是授权码）
password = "your_password"

if current_ip:
    # 读取本地文件，获取上一次的外网 IP 地址
    try:
        with open("ip.txt", "r") as f:
            last_ip = f.read().strip()
    except FileNotFoundError:
        last_ip = ""

    # 检查 IP 是否发生变化
    if current_ip != last_ip:
        # 发送邮件通知
        message = MIMEText(f"Your public IP has changed to {current_ip}", "plain", "utf-8")
        message["From"] = Header("IP Monitor", "utf-8")
        message["To"] = Header("You", "utf-8")
        message["Subject"] = Header("IP Address Change Notification", "utf-8")

        try:
            smtp_obj = smtplib.SMTP("smtp.example.com", 587)
            smtp_obj.starttls()
            smtp_obj.login(sender, password)
            smtp_obj.sendmail(sender, receiver, message.as_string())
            smtp_obj.quit()
            print("邮件发送成功")
        except smtplib.SMTPException as e:
            print(f"邮件发送失败：{e}")

        # 更新本地文件中的 IP 地址
        with open("ip.txt", "w") as f:
            f.write(current_ip)
else:
    print("无法获取当前的外网 IP 地址")