def parse_authorization_header(self):
        digest = self.request.headers.get('Authorization')
        digest = re.sub(r'^Basic ', '', digest)
        try:
            digest = base64.b64decode(digest)
        except __HOLE__:
            self.raise_http_400({'error': 'invalid_request',
                                 'error_description': 'Base 64 from Authorization header could not be decoded'})
        self.client_id, self.code_from_header = digest.split(':')
dataset/ETHPy150Open globocom/oauth2u/oauth2u/server/handlers/defaults.py/AccessTokenHandler.parse_authorization_header