code: def _frontend_url():
      '''
      Tries to guess the url of zabbix frontend.
  
      .. versionadded:: 2016.3.0
      '''
      hostname = socket.gethostname()
      frontend_url = 'http://' + hostname + '/zabbix/api_jsonrpc.php'
      try:
          try:
              response = salt.utils.http.query(frontend_url)
              error = response['error']
          except HTTPError as http_e:
              error = six.text_type(http_e)
          if error.find('412: Precondition Failed'):
              return frontend_url
          else:
              raise KeyError
      except (ValueError, KeyError):
          return Falsf _frontend_url():
      '''
      Tries to guess the url of zabbix frontend.
  
      .. versionadded:: 2016.3.0
      '''
      hostname = socket.gethostname()
      frontend_url = 'http://' + hostname + '/zabbix/api_jsonrpc.php'
      try:
          try:
              response = salt.utils.http.query(frontend_url)
              error = response['error']
          except HTTPError as http_e:
              error = six.text_type(http_e)
          if error.find('412: Precondition Failed'):
              return frontend_url
          else:
              raise KeyError
      except (ValueError, KeyError):
          return False
docs: Tries to guess the url of zabbix frontend.
  
      .. versionadded:: 2016.3.0