dns_update.py

#!/usr/bin/python3

INTERVAL = 300
DOMAINS = [
    {
        "domain":"",
        "password":"",
        "host":"@"
    }
]


import requests
from time import sleep

def _get_ip():
    res = requests.get("https://api.ipify.org/")
    if res.status_code==200:
        return res.text

LAST_IP = None

def _update_ip(domain,password,host):
    res = requests.get("https://dynamicdns.park-your-domain.com/update",data={
        "host":host,
        "domain":domain,
        "password":password,
        "ip":LAST_IP
    })
    if res.status_code==200:
        return True
    else:
        return res.text


while True:
    try:
        ip = _get_ip()
        if not ip:
            print("Something went wrong with the IP API")
        elif ip and ip!=LAST_IP:
            print("Updating IP to {}".format(ip))
            LAST_IP = ip
            for i in DOMAINS:
                up = _update_ip(i["domain"],i["password"],i["host"])
                if type(up)==bool:
                    print("Updated IP for {}".format(i["domain"]))
                else:
                    print("""
                    Something went wrong updating {}
                    Error message: {}
                    """.format(i["domain"],up))
    finally:
        print("Sleeping for {} seconds".format(INTERVAL))
        sleep(INTERVAL)