Send a file from a given directory.

    Arguments:
       directory: Directory that when combined with file_name gives
           the file path.
       file_name: File name that when combined with directory gives
           the file path.
       See :func:`send_file` for the other arguments.

async def send_from_directory(
        directory: FilePath,
        file_name: str,
        *,
        mimetype: Optional[str]=None,
        as_attachment: bool=False,
        attachment_filename: Optional[str]=None,
        add_etags: bool=True,
        cache_timeout: Optional[int]=None,
        conditional: bool=True,
        last_modified: Optional[datetime]=None,
) -> Response:
    """Send a file from a given directory.

    Arguments:
       directory: Directory that when combined with file_name gives
           the file path.
       file_name: File name that when combined with directory gives
           the file path.
       See :func:`send_file` for the other arguments.
    """
    file_path = safe_join(directory, file_name)
    if not file_path.is_file():
        raise NotFound()
    return await send_file(
        file_path,
        mimetype=mimetype,
        as_attachment=as_attachment,
        attachment_filename=attachment_filename,
        add_etags=add_etags,
        cache_timeout=cache_timeout,
        conditional=conditional,
        last_modified=last_modified,
    )