cloudflare dynamic dns #ddns #dyndns public ip setter script

dyndns-cloudflare.py

#!/usr/bin/env python3
# First create subdomain. Eg: laptop.example.com
# Then set parameters belog. Eg: subdom = "laptop"
# This script will fetch external public ip and set it as value.
# Make sure target record is A record!

import json, urllib.request

"""
urllib.request.install_opener(
	urllib.request.build_opener(
		urllib.request.HTTPSHandler(debuglevel=1)
	)
)
"""

request = lambda url, data=None, headers={}, method="GET": \
	urllib.request.urlopen(
		urllib.request.Request(url, data=data, headers=headers, method=method)
	).read().decode()

ident  = None #"5d0351519136bf626c8c15fb2b304c84"
zone   = "_your_zone_id_"
mail   = "_your_mail_addr_"
apikey = "_your_api_key_"
addr   = request("http://wtfismyip.com/text").split()[0]
url_r  = "https://api.cloudflare.com/client/v4/zones/{zone}/dns_records"
url_w  = "https://api.cloudflare.com/client/v4/zones/{zone}/dns_records/{id}"
subdom = "_subdomain_to_search_for_"

head = {
	"Content-Type": "application/json",
	"X-AUTH-EMAIL": mail,
	"X-AUTH-KEY": apikey,
}

data = {
	"ttl": 300,
	"type": "A",
	"name": subdom,
	"content": addr,
}

resp = json.loads(request(url_r.format(zone=zone), headers=head))

if not ident: # searches for id of subdomain
	for z in resp["result"]:
		if z["name"].startswith(subdom):
			ident = z["id"]

resp = json.loads(request(url_w.format(id=ident, zone=zone),
	headers=head, data=json.dumps(data).encode(), method="PUT"
))

print(resp["result"])