Flask 静态文件缓存问题

@app.context_processor

def override_url_for():

    return dict(url_for=dated_url_for)

def dated_url_for(endpoint, **values):

    if endpoint == 'static':

        filename = values.get('filename', None)

    if filename:

        file_path = os.path.join(app.root_path, endpoint, filename)

        values['q'] = int(os.stat(file_path).st_mtime)

        return url_for(endpoint, **values)