flask_assets.py 文件源码

def get_static_folder(app_or_blueprint):
    """Return the static folder of the given Flask app
    instance, or module/blueprint.

    In newer Flask versions this can be customized, in older
    ones (<=0.6) the folder is fixed.
    """
    if not hasattr(app_or_blueprint, 'static_folder'):
        # I believe this is for app objects in very old Flask
        # versions that did not support custom static folders.
        return path.join(app_or_blueprint.root_path, 'static')

    if not app_or_blueprint.has_static_folder:
        # Use an exception type here that is not hidden by spit_prefix.
        raise TypeError(('The referenced blueprint %s has no static '
                         'folder.') % app_or_blueprint)
    return app_or_blueprint.static_folder