simple_httpclient.py 文件源码

def _handle_exception(self, typ, value, tb):
        if self.final_callback:
            self._remove_timeout()
            if isinstance(value, StreamClosedError):
                if value.real_error is None:
                    value = HTTPError(599, "Stream closed")
                else:
                    value = value.real_error
            self._run_callback(HTTPResponse(self.request, 599, error=value,
                                            request_time=self.io_loop.time() - self.start_time,
                                            ))

            if hasattr(self, "stream"):
                # TODO: this may cause a StreamClosedError to be raised
                # by the connection's Future.  Should we cancel the
                # connection more gracefully?
                self.stream.close()
            return True
        else:
            # If our callback has already been called, we are probably
            # catching an exception that is not caused by us but rather
            # some child of our callback. Rather than drop it on the floor,
            # pass it along, unless it's just the stream being closed.
            return isinstance(value, StreamClosedError)