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December 18, 2024 00:14
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cloudflare_dynamic_ip_updater.sh
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| #!/usr/bin/env python | |
| import json | |
| import requests | |
| import logging | |
| import logging.handlers | |
| import string | |
| import sys | |
| import ipaddress | |
| logger = logging.getLogger(__name__) | |
| logger.setLevel(logging.DEBUG) | |
| handler = logging.handlers.SysLogHandler(address='/dev/log') | |
| formatter = logging.Formatter('%(module)s: %(message)s') | |
| handler.setFormatter(formatter) | |
| logger.addHandler(handler) | |
| base_url = 'https://api.cloudflare.com/client/v4/' | |
| api_email = 'API_EMAIL' | |
| api_key = 'API_KEY' | |
| zone_name = 'DOMAIN_NAME' | |
| headers = { | |
| "X-Auth-Email": api_email, | |
| "X-Auth-Key": api_key, | |
| "Content-Type": "application/json" | |
| } | |
| # get zone id | |
| params = { | |
| "name": zone_name, | |
| "match": "all" | |
| } | |
| r = requests.get(base_url + 'zones', params=params, headers=headers) | |
| json_result = json.loads(r.text) | |
| if r.raise_for_status(): | |
| logger.critical(requests.exceptions.HTTPError) | |
| sys.exit(1) | |
| if not json_result["success"]: | |
| logger.critical(string.join(json_result["errors"], ",")) | |
| sys.exit(1) | |
| if len(json_result["result"]) > 1: | |
| logger.critical("More than one zone returned") | |
| sys.exit(1) | |
| zone_id = json_result["result"][0]["id"] | |
| # get A record and current IP address | |
| params = { | |
| "type": "A", | |
| "match": "all" | |
| } | |
| r = requests.get(base_url + 'zones/' + zone_id + '/dns_records', params=params | |
| , headers=headers) | |
| json_result = json.loads(r.text) | |
| if r.raise_for_status(): | |
| logger.critical(requests.exceptions.HTTPError) | |
| sys.exit(1) | |
| if not json_result["success"]: | |
| logger.critical(string.join(json_result["errors"], ",")) | |
| sys.exit(1) | |
| if len(json_result["result"]) > 1: | |
| logger.critical("More than one A record returned") | |
| sys.exit(1) | |
| if json_result["result"][0]["name"] != zone_name: | |
| logger.critical("Record name should be the same as the zone name") | |
| sys.exit(1) | |
| record_id = json_result["result"][0]["id"] | |
| current_ip = json_result["result"][0]["content"] | |
| # get external ip | |
| r = requests.get("http://ipinfo.io/json", timeout=60) | |
| if r.raise_for_status(): | |
| logger.critical(requests.exceptions.HTTPError) | |
| sys.exit(1) | |
| json_result = json.loads(r.text) | |
| try: | |
| external_ip = ipaddress.ip_address(json_result["ip"]) | |
| except Exception, ex: | |
| logger.critical(ex.message) | |
| sys.exit(1) | |
| if external_ip.version != 4 or not external_ip.exploded: | |
| logger.error("Not global IPv4 address") | |
| sys.exit(1) | |
| if current_ip == external_ip.exploded: | |
| logger.info("No IP change") | |
| sys.exit(0) | |
| # do update | |
| content = { | |
| "id": record_id, | |
| "type": "A", | |
| "name": zone_name, | |
| "content": external_ip.exploded, | |
| "ttl": 300 | |
| } | |
| r = requests.put(base_url + 'zones/' + zone_id + '/dns_records/' + record_id, | |
| headers=headers, data=json.dumps(content)) | |
| if r.raise_for_status(): | |
| logger.critical(requests.exceptions.HTTPError) | |
| sys.exit(1) | |
| logger.info("Public IP " + external_ip.exploded + " published") | |
| sys.exit(0) |
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