Process the request before routing it.

def process_request(self, req, resp):  # pylint: disable=unused-argument
        """ Process the request before routing it. """

        if req.path in (self.revoke_endpoint, self.token_endpoint):
            return

        try:
            token = self._get_token(req)
            self.auth_token(token)
        except (AuthRequired, InvalidAuthSyntax) as exc:
            if not self.optional:
                abort(exc)
        except AuthRejected as exc:
            if not self.optional:
                exc.headers = self._get_invalid_token_headers(exc.detail)
                abort(exc)