Get external IP of the current machine from one of the services and send it to the Telegram chat using bot API

send_external_ip_to_telegram.py

# Script initially generated by ChatGPT with GPT-4 and manually modified in some details

import requests
import os
import socket
import logging
import smtplib
from email.message import EmailMessage
from typing import Tuple, Optional

logging.basicConfig(
    level=logging.INFO, format="%(asctime)s - %(levelname)s - %(message)s"
)

# Replace with your own bot token and chat_id
bot_token = "TELEGRAM_BOT_TOKEN"
chat_id = "TELEGRAM_CHAT_ID"

# Email credentials
email_address = "SENDER_EMAIL"
email_password = "SENDER_APP_PASSWORD"
recipient_email = "RECIPIENT_EMAIL"

def send_email(subject, body):
    msg = EmailMessage()
    msg.set_content(body)
    msg["Subject"] = subject
    msg["From"] = email_address
    msg["To"] = recipient_email

    try:
        with smtplib.SMTP_SSL("smtp.gmail.com", 465) as server:
            server.login(email_address, email_password)
            server.send_message(msg)
            logging.info("Email sent successfully")
    except Exception as e:
        logging.error(f"Failed to send email: {e}")


def is_valid_ipv4_address(ip):
    try:
        socket.inet_pton(socket.AF_INET, ip)
    except AttributeError:  # no inet_pton here, sorry
        try:
            socket.inet_aton(ip)
        except socket.error:
            return False
        return ip.count(".") == 3
    except socket.error:  # not a valid address
        return False

    return True


def get_external_ip(services) -> Tuple[Optional[str], Optional[str]]:
    for service in services:
        try:
            response = requests.get(service, timeout=5)
            response.raise_for_status()
            ip = response.text.strip()
            if is_valid_ipv4_address(ip):
                return ip, service
        except requests.exceptions.RequestException as e:
            logging.warning(f"Getting IP from {service} failed with error {e}")
    return None, None


ip_services = [
    "https://ipecho.net/plain",
    "https://api.ipify.org?format=text",
    "http://checkip.amazonaws.com/",
    "https://ipinfo.io/ip",
    "http://icanhazip.com/",
    "http://ifconfig.me/ip",
    "http://ip-api.com/line?fields=query",
    "https://myexternalip.com/raw",
]

external_ip, service_name = get_external_ip(ip_services)

if external_ip:
    # Specify the temporary file to store the last known IP address
    temp_file = "last_known_ip.txt"

    # Check if the temporary file exists and read the content
    if os.path.exists(temp_file):
        with open(temp_file, "r") as file:
            last_known_ip = file.read()
    else:
        last_known_ip = ""

    # Compare the current external IP with the last known IP
    if external_ip != last_known_ip:
        # Save the current IP to the temporary file
        with open(temp_file, "w") as file:
            file.write(external_ip)

        # Prepare the message
        message = f"The current external IP has changed from {last_known_ip} to: {external_ip} (obtained from {service_name})"

        # Send message to the Telegram channel
        url = f"https://api.telegram.org/bot{bot_token}/sendMessage"
        payload = {"chat_id": chat_id, "text": message}

        requests.post(url, data=payload)
        
        # Send email notification
        send_email("External IP Address Changed", message)
else:
    logging.error("Unable to fetch IP address from any of the services.")