{'username': 'Foobear', 'realm': 'testrealm', 'qop': 'chap', 'cnonce':
    '5ccc069c403ebaf9f0171e9517f40e41', 'response':
    '6629fae49393a05397450978507c4ef1', 'Authorization': 'Digest'}
Parse an HTTP request Authorization header with Python