aly / ddnsupdate.py

import requests,time,socket,json,sys def init_settings(): try: with open("settings.json") as f: settings = json.load(f) return settings except: with open("settings.json", "w") as f: settings = dict(domain="REPLACE_WITH_DOMAIN", host="REPLACE_WITH_SUBDOMAIN", password="REPLACE_WITH_DDNS_PASSWORD", updateUrl="https://dynamicdns.park-your-domain.com/update") f.write(json.dumps(settings)) return False def do_update(settings): with open("ddns.log", "a") as f: settings["ip"] = requests.get("http://ipv4.icanhazip.com").text.strip() oldip = socket.gethostbyname("{host}.{domain}".format(**settings)) if settings["ip"] != oldip: d = requests.get(settings.pop("updateUrl"), params=settings).text if "<Done>true</Done>" in d: logline = "{}: Success ({})\r\n".format(time.ctime(), settings["ip"]) retval = 0 else: logline = "{}: Error: {} ({})\r\n".format(time.ctime(), d, settings["ip"]) retval = 1 else: logline = "{}: Skipping ({})\r\n".format(time.ctime(), settings["ip"]) retval = 5 f.write(logline) print logline.strip() return retval def main(): settings = init_settings() if settings: return do_update(settings) else: print "settings.json updated with url parameters, please update to fit the url provided by your DDNS service" return 50 if __name__ == "__main__": sys.exit(main())