Method on_connection_close

python/python3/tornado/web.py:306–323

Called in async handlers if the client closed the connection. Override this to clean up resources associated with long-lived connections. Note that this method is called only if the connection was closed during asynchronous processing; if you need to do cleanup afte

(self)

        pass

    def on_connection_close(self) -> None:
        """Called in async handlers if the client closed the connection.

        Override this to clean up resources associated with
        long-lived connections.  Note that this method is called only if
        the connection was closed during asynchronous processing; if you
        need to do cleanup after every request override `on_finish`
        instead.

        Proxies may keep a connection open for a time (perhaps
        indefinitely) after the client has gone away, so this method
        may not be called promptly after the end user closes their
        connection.
        """
        if _has_stream_request_body(self.__class__):
            if not self.request._body_future.done():
                self.request._body_future.set_exception(iostream.StreamClosedError())
                self.request._body_future.exception()

    def clear(self) -> None:
        """Resets all headers and content for this response."""