def get_dns_ip(self, zone_uuid: str) -> str:
"""Get the DNS A @ record."""
url = '{}/zones/{}/records'.format(self.api, zone_uuid)
headers = {'X-Api-Key': self.api_secret}
response = get(url, headers=headers)
try:
tld_a_record = [
entry for entry in response
if entry['rrset_type'] == 'A'
and entry['rrset_name'] == '@'
]
ip_record = tld_a_record[0]['rrset_values'][0]
self.validate_subdomain_entries(response)
message = 'Discovered IP address of {} for {} DNS A @ record'
logger.info(message.format(ip_record, self.domain))
return ip_record
except (KeyError, IndexError):
message = 'Could not find A record for {}'.format(self.domain)
logger.critical(message)
exit(EXIT_CODE_1_BAD)
def get_user() -> str:
"""Determine who the current user is."""
try:
return check_output('whoami', timeout=0.5).decode('utf-8').strip()
except OSError as exception:
message = 'Canot determine user. Raised {}'.format(str(exception))
logger.critical(message)
exit(EXIT_CODE_1_BAD)
def validate_subdomain_entries(self, response):
"""Validate that user specified subdomain entries exist."""
entries = set([entry['rrset_name'] for entry in response])
entries_match = all((subd in entries for subd in self.subdomains))
if not entries_match:
message = 'Missing subdomain DNS record from {} under {}'
subdomains = ','.join(self.subdomains)
logger.critical(message.format(subdomains, self.domain))
exit(EXIT_CODE_1_BAD)
def validate_api_secrets(config, sections) -> None:
"""Validate the DNS providers are actually supported."""
for section in sections:
try:
config[section]['api_secret']
except KeyError:
message = 'No api_secret in {} config section'.format(section)
logger.critical(message)
exit(EXIT_CODE_1_BAD)
def put(url, payload, headers=None):
"""Run a HTTP PUT on some web resource."""
headers = headers or []
try:
request = Request(url, headers=headers, method='PUT')
dumped = dumps(payload).encode('utf-8')
return (urlopen(request, data=dumped,
timeout=REQUEST_TIMEOUT).read().decode('utf-8'))
except (URLError, ValueError, timeout) as exception:
print(exception.file.read())
message = 'Unable to PUT against {}: {}'.format(url, str(exception))
logger.critical(message)
exit(EXIT_CODE_1_BAD)
def validate_dns_providers(config, sections) -> None:
"""Validate the DNS providers are actually supported."""
for section in sections:
try:
provider = config[section]['provider']
if provider not in SUPPORTED_DNS_PROVIDERS:
message = 'Unsupported DNS provider {}'.format(provider)
logger.critical(message)
exit(EXIT_CODE_1_BAD)
except KeyError:
message = 'No provider in {} config section'.format(section)
logger.critical(message)
exit(EXIT_CODE_1_BAD)
def read_config(user: str, root: Union[str, None] = None) -> Any:
"""Read the INI configuration file."""
cfg_path = '{root}/{user}/.hdyndns/hdyndns.ini'.format(
root=root if root else '/home', user=user)
config = ConfigParser()
if not config.read(cfg_path):
message = 'Missing configuration from {}'.format(cfg_path)
logger.critical(message)
exit(EXIT_CODE_1_BAD)
return config
def get_zone_uuid(self) -> List[str]:
"""Get the DNS zone UUID."""
url = '{}/domains/{}'.format(self.api, self.domain)
headers = {'X-Api-Key': self.api_secret}
response = get(url, headers=headers)
try:
zone_uuid = response['zone_uuid']
message = 'Discovered Gandi zone UUID of {} for {}'
logger.info(message.format(zone_uuid, self.domain))
return zone_uuid
except KeyError as exception:
message = 'Missing {} from {}'
logger.critical(message.format(str(exception), dumps(response)))
exit(EXIT_CODE_1_BAD)
def cli_entrypoint() -> None:
"""The command line entrypoint."""
user = get_user()
create_home(user)
config = read_config(user)
sections = [section for section in config.keys() if section != 'DEFAULT']
validate_dns_providers(config, sections)
validate_api_secrets(config, sections)
for section in sections:
if 'gandi' == config[section]['provider']:
logger.info('Processing {} with provider Gandi'.format(section))
GandiDynDNS(config[section]).update_dns()
exit(EXIT_CODE_0_OK)
else:
logger.critical('No supported provider found')
exit(EXIT_CODE_1_BAD)
def get(url, headers=None, load_json=True):
"""Run a HTTP GET on some web resource."""
headers = headers or {}
try:
request = Request(url, headers=headers, method='GET')
response = (urlopen(request,
timeout=REQUEST_TIMEOUT).read().decode('utf-8'))
if not load_json:
return response
try:
return loads(response)
except JSONDecodeError:
message = 'Unable to JSON load {}'.format(response)
logger.critical(message)
exit(EXIT_CODE_1_BAD)
except (URLError, ValueError, timeout) as exception:
message = 'Unable to GET against {}: {}'.format(url, str(exception))
logger.critical(message)
exit(EXIT_CODE_1_BAD)
