code: def iiif_info_handler(prefix=None, identifier=None,
                        config=None, klass=None, auth=None, **args):
      
      if (not auth or degraded_request(identifier) or auth.info_authz()):
          # go ahead with request as made
          if (auth):
              logging.debug("Authorized for image %s" % identifier)
          i = IIIFHandler(prefix, identifier, config, klass, auth)
          try:
              return i.image_information_response()
          except IIIFError as e:
              return i.error_response(e)
      elif (auth.info_authn()):
          # authn but not authz -> 401
          abort(401)
      else:
          # redirect to degraded
          response = redirect(host_port_prefix(
              config.host, config.port, prefix) + '/' + identifier + '-deg/info.json')
          response.headers['Access-control-allow-origin'] = '*'
          return response
docs: Handler for IIIF Image Information requests.