code: def _get_docushare_url(handle, validate=True):
          
          logger = structlog.get_logger(__name__)
          logger.debug('Using Configuration._get_docushare_url')
  
          # Make a short link to the DocuShare version page since
          # a) It doesn't immediately trigger a PDF download,
          # b) It gives the user extra information about the document before
          #    downloading it.
          url = 'https://ls.st/{handle}*'.format(handle=handle.lower())
  
          if validate:
              # Test that the short link successfully resolves to DocuShare
              logger.debug('Validating {0}'.format(url))
              try:
                  response = requests.head(url, allow_redirects=True, timeout=30)
              except requests.exceptions.RequestException as e:
                  raise DocuShareError(str(e))
  
              error_message = 'URL {0} does not resolve to DocuShare'.format(url)
              if response.status_code != 200:
                  logger.warning('HEAD {0} status: {1:d}'.format(
                      url, response.status_code))
                  raise DocuShareError(error_message)
              redirect_url_parts = urllib.parse.urlsplit(response.url)
              if redirect_url_parts.netloc != 'docushare.lsst.org':
                  logger.warning('{0} resolved to {1}'.format(url, response.url))
                  raise DocuShareError(error_message)
  
          return url
docs: Get a docushare URL given document's handle.
  
          Parameters
          ----------
          handle : `str`
              Handle name, such as ``'LDM-151'``.
          validate : `bool`, optional
              Set to `True` to request that the link resolves by performing
              a HEAD request over the network. `False` disables this testing.
              Default is `True`.
  
          Returns
          -------
          docushare_url : `str`
              Shortened DocuShare URL for the document corresponding to the
              handle.
  
          Raises
          ------
          lander.exceptions.DocuShareError
              Raised for any error related to validating the DocuShare URL.