DynFlare - CloudFlare as dynamic dns service

dynflare.py

#!/usr/bin/env python
# encoding: utf-8
"""
dynflare
Created by Djordje Stojanovic <[email protected]>

"""
import sys
import socket
import logging
try:
	import json
except ImportError:
	import simplejson as json
try:
	import requests
except ImportError:
	logging.error('`requests` library required. Install with `sudo pip install requests`')
	sys.exit(1)
try:
	import dns.resolver as resolver
except ImportError:
	logging.error('`dnspython` library required. Install with `sudo pip install dnspython`')
	sys.exit(1)

class CloudFlare(object):
	def __init__(self, email, token):
		self.url = 'https://www.cloudflare.com/api_json.html'
		self.email = email
		self.token = token
	
	def _request(self, payload):
		r = requests.get(self.url, params=payload)
		if r.status_code == 200:
			return r.json()
		else:
			logging.error('Unable to make request to CloudFlare!')
			return None
	
	def _create_payload(self, action, data=None):
		payload = {
			'a': action,
			'tkn': self.token,
			'email': self.email
		}
		return ((data is not None and type(data) is dict) and dict(payload, **data)) or payload
	
	def get_records(self, domain):
		data = { 'z': domain }
		payload = self._create_payload('rec_load_all', data)
		return self._request(payload)
	
	def get_record(self, domain, name):
		records = self.get_records(domain)['response']['recs']
		fqdn = "{}.{}".format(name, domain)
		record = filter(lambda record: record['name'] == fqdn, records['objs'])
		if len(record) > 0:
			return record[0]
		else:
			logging.warning('Record for %s not found.', fqdn)
			return None
	
	def create_record(self, domain, name, content, record_type='A', ttl=1):
		record_types = ['A', 'CNAME', 'MX', 'TXT', 'SPF', 'AAAA', 'NS', 'SRV', 'LOC']
		if record_type.upper() in record_types:
			data = {
				'z': domain,
				'type': record_type.upper(),
				'name': name,
				'content': content,
				'ttl': ttl
			}
			payload = self._create_payload('rec_new', data)
			return self._request(payload)
		else:
			logging.error('Record type is not in %s', '/'.join(record_types))
			return None
	
	def edit_record(self, domain, name, content, record_type='', ttl=None):
		record = self.get_record(domain, name)
		if record is not None:
			filter_non_empty = lambda dictionary: dict([ (i, dictionary[i]) for i in dictionary if dictionary[i] is not None or dictionary[i] is not ''])
			data = {
				'z': domain,
				'type': record_type,
				'id': record['rec_id'],
				'content': content,
				'ttl': ttl
			}
			data = filter_non_empty(data)
			payload = self._create_payload('rec_edit', data)
			return self._request(payload)
		else:
			return None
	
	def delete_record(self, domain, name):
		record = self.get_record(domain, name)
		if record is not None:
			data = {
				'z': domain,
				'id': record['rec_id']
			}
			payload = self._create_payload('rec_delete', data)
			return self._request(payload)
		else:
			return None

def get_public_ip():
	r = resolver.Resolver()
	r.nameservers = [socket.gethostbyname('resolver1.opendns.com')]
	return r.query('myip.opendns.com', 'A')[0].address

def main():
	hostname = socket.gethostname()
	ip = get_public_ip()
	cf = CloudFlare("YOUR_EMAIL", "YOUR_CF_TOKEN")
	domain = 'YOUR_DOMAIN'
	record = cf.get_record(domain, hostname)
	r = None
	if record is not None:
		if 'name' in record:
			logging.info('Updating record for %s.%s', hostname, domain)
			r = cf.edit_record(domain, hostname, ip)
	else:
		logging.info('Creating record for %s.%s', hostname, domain)
		r = cf.create_record(domain, hostname, ip)
	if r is None:
		logging.error('Errored out while editing CloudFlare DNS Record')
		print r
		sys.exit(1)
	logging.info('%s.%s -> %s', hostname, domain, ip)
	logging.info('Update sucessfull')
	# print hostname+'.'+domain+' -> '+ip
	# print 'Update sucessfull'
	sys.exit(0)

if __name__ == '__main__':
	main()