code: def get(self):
      
      try:
        cluster = self.get_argument_cluster()
        role = self.get_argument_role()
        environ = self.get_argument_environ()
        topology_name = self.get_argument_topology()
        container = self.get_argument(constants.PARAM_CONTAINER)
        path = self.get_argument(constants.PARAM_PATH)
        offset = self.get_argument_offset()
        length = self.get_argument_length()
        topology_info = self.tracker.getTopologyInfo(topology_name, cluster, role, environ)
  
        stmgr_id = "stmgr-" + container
        stmgr = topology_info["physical_plan"]["stmgrs"][stmgr_id]
        host = stmgr["host"]
        shell_port = stmgr["shell_port"]
        file_data_url = "http://%s:%d/filedata/%s?offset=%s&length=%s" % \
          (host, shell_port, path, offset, length)
  
        http_client = tornado.httpclient.AsyncHTTPClient()
        response = yield http_client.fetch(file_data_url)
        self.write_success_response(json.loads(response.body))
        self.finish()
      except Exception as e:
        Log.debug(traceback.format_exc())
        self.write_error_response(e)
docs: get method