code: def respond_webhook(self, environ):
          
          request = FieldStorage(fp=environ["wsgi.input"], environ=environ)
          url = environ["PATH_INFO"]
          params = dict([(k, request[k].value) for k in request])
          try:
              if self.bot is None:
                  raise NotImplementedError
              response = self.bot.handle_webhook_event(environ, url, params)
          except NotImplementedError:
              return 404
          except:
              self.logger.debug(format_exc())
              return 500
          return response or 200
docs: Passes the request onto a bot with a webhook if the webhook
          path is requested.