class_docstr: Implements the HTTP/1.x protocol.
  
  This class can be on its own for clients, or via `HTTP1ServerConnection`
  for servers.
class_docstr_tok: ["Implements","the","HTTP\/1.x","protocol",".","This","class","can","be","on","its","own","for","clients",",","or","via","`","HTTP1ServerConnection","`","for","servers","."]
code: def _on_connection_close(self):
      # Note that this callback is only registered on the IOStream
      # when we have finished reading the request and are waiting for
      # the application to produce its response.
      if self._close_callback is not None:
          callback = self._close_callback
          self._close_callback = None
          callback()
      if not self._finish_future.done():
          self._finish_future.set_result(None)
      self._clear_callbacks()
  
imports: from __future__ import absolute_import, division, print_function
  import re
  from tornado.concurrent import Future
  from tornado.escape import native_str, utf8
  from tornado import gen
  from tornado import httputil
  from tornado import iostream
  from tornado.log import gen_log, app_log
  from tornado import stack_context
  from tornado.util import GzipDecompressor, PY3
label_desc: Use image node_id 6 for calling the HTTP1Connection obj's underlying member method code with example usage: obj._on_connection_close() without return types