'You may call this once you have set the content_length to the whole
object length and body or app_iter to reset the content_length
properties on the request.
It is ok to not call this method, the conditional response will be
maintained for you when you __call__ the response.'

def fix_conditional_response(self):

    self.response_iter = self._response_iter(self.app_iter, self._body)
