helpers.py 文件源码

def request_wants_json():
    """Checks whether a JSON response is expected base on the Accept-Header.

    Flask Snippet: http://flask.pocoo.org/snippets/45/

    Returns:
        True if JSON is expected, False otherwise.
    """
    best = request.accept_mimetypes.best_match(
        ['application/json', 'text/html'])
    return (best == 'application/json' and
            request.accept_mimetypes[best] >
            request.accept_mimetypes['text/html'])