common.py 文件源码

def _render(resource, request):
    # type: (Resource, Union[DummyRequest, Request]) -> Any
    """
    Simulate rendering of a Twisted resource.
    :param resource: Twisted Resource with render() method.
    :param request: Request (or mock object).
    :return: Deferred 
    """
    result = resource.render(request)
    if isinstance(result, bytes):
        request.write(result)
        request.finish()
        return succeed(None)
    elif result == NOT_DONE_YET:
        if request.finished:
            return succeed(None)
        else:
            return request.notifyFinish()
    else:
        raise ValueError("Unexpected return value: %r" % (result,))