else:

      DL_URL_PREFIX = 'https://dl.fedoraproject.org'

  def get_page(page, pages):

      """ Retrieve the JSON for a particular page of datagrepper results """

              # Do an HTTP HEAD to find the size of the file in megabytes

              url = entry['image_url']

              if not url.startswith('http'):

                  url = DL_URL_PREFIX + url

              response = requests.head(url)

              if not bool(response):

                  log.error("Failed to HEAD %s for size.  %r" % (url, response))

              # Provide the download URL

              url_key = mapping[key] + "_url"

              # Figure out which of our vars we're going to set, and set it

              iso_size_key = iso_size_prefix + mapping[key]