text: """DNS Authenticator for OVH DNS."""
  import logging
  
  import zope.interface
  from lexicon.providers import ovh
  
  from certbot import errors
  from certbot import interfaces
  from certbot.plugins import dns_common
  from certbot.plugins import dns_common_lexicon
  
  logger = logging.getLogger(__name__)
  
  TOKEN_URL = 'https://eu.api.ovh.com/createToken/ or https://ca.api.ovh.com/createToken/'
  
  
  @zope.interface.implementer(interfaces.IAuthenticator)
  @zope.interface.provider(interfaces.IPluginFactory)
  class Authenticator(dns_common.DNSAuthenticator):
      """DNS Authenticator for OVH
  
      This Authenticator uses the OVH API to fulfill a dns-01 challenge.
      """
  
      description = 'Obtain certificates using a DNS TXT record (if you are using OVH for DNS).'
      ttl = 60
  
      def __init__(self, *args, **kwargs):
          super(Authenticator, self).__init__(*args, **kwargs)
          self.credentials = None
  
      @classmethod
      def add_parser_arguments(cls, add):  # pylint: disable=arguments-differ
          super(Authenticator, cls).add_parser_arguments(add, default_propagation_seconds=30)
          add('credentials', help='OVH credentials INI file.')
  
      def more_info(self):  # pylint: disable=missing-docstring,no-self-use
          return 'This plugin configures a DNS TXT record to respond to a dns-01 challenge using ' + \
                 'the OVH API.'
  
      def _setup_credentials(self):
          self.credentials = self._configure_credentials(
              'credentials',
              'OVH credentials INI file',
              {
                  'endpoint': 'OVH API endpoint (ovh-eu or ovh-ca)',
                  'application-key': 'Application key for OVH API, obtained from {0}'
                  .format(TOKEN_URL),
                  'application-secret': 'Application secret for OVH API, obtained from {0}'
                  .format(TOKEN_URL),
                  'consumer-key': 'Consumer key for OVH API, obtained from {0}'
                  .format(TOKEN_URL),
              }
          )
  
      def _perform(self, domain, validation_name, validation):
          self._get_ovh_client().add_txt_record(domain, validation_name, validation)
  
      def _cleanup(self, domain, validation_name, validation):
          self._get_ovh_client().del_txt_record(domain, validation_name, validation)
  
      def _get_ovh_client(self):
          return _OVHLexiconClient(
              self.credentials.conf('endpoint'),
              self.credentials.conf('application-key'),
              self.credentials.conf('application-secret'),
              self.credentials.conf('consumer-key'),
              self.ttl
          )
  
  
  class _OVHLexiconClient(dns_common_lexicon.LexiconClient):
      """
      Encapsulates all communication with the OVH API via Lexicon.
      """
  
      def __init__(self, endpoint, application_key, application_secret, consumer_key, ttl):
          super(_OVHLexiconClient, self).__init__()
  
          self.provider = ovh.Provider({
              'provider_name': 'ovh',
              'auth_entrypoint': endpoint,
              'auth_application_key': application_key,
              'auth_application_secret': application_secret,
              'auth_consumer_key': consumer_key,
              'ttl': ttl,
          })
  
      def _handle_http_error(self, e, domain_name):
          hint = None
          if str(e).startswith('400 Client Error:'):
              hint = 'Is your Application Secret value correct?'
          if str(e).startswith('403 Client Error:'):
              hint = 'Are your Application Key and Consumer Key values correct?'
  
          return errors.PluginError('Error determining zone identifier for {0}: {1}.{2}'
                                    .format(domain_name, e, ' ({0})'.format(hint) if hint else ''))
  
      def _handle_general_error(self, e, domain_name):
          if domain_name in str(e) and str(e).endswith('not found'):
              return
  
          super(_OVHLexiconClient, self)._handle_general_error(e, domain_name)
  