code: def get(self, cluster, environ, topology, container):
      '''
      :param cluster:
      :param environ:
      :param topology:
      :param container:
      :return:
      '''
      offset = self.get_argument("offset")
      length = self.get_argument("length")
      path = self.get_argument("path")
  
      data = yield access.get_container_file_data(cluster, environ, topology, container, path,
                                                  offset, length)
  
      self.write(data)
      self.finish(f get(self, cluster, environ, topology, container):
      '''
      :param cluster:
      :param environ:
      :param topology:
      :param container:
      :return:
      '''
      offset = self.get_argument("offset")
      length = self.get_argument("length")
      path = self.get_argument("path")
  
      data = yield access.get_container_file_data(cluster, environ, topology, container, path,
                                                  offset, length)
  
      self.write(data)
      self.finish()
docs: :param cluster:
      :param environ:
      :param topology:
      :param container:
      :return: