python 介面實現類的

定義介面實現

class ObjectAuth(ABC):
    @staticmethod
    def dispatch(type):
        for sub_cls in ObjectAuth.__subclasses__():
            if sub_cls.__name__.lower().find(type.lower()) >= 0:
                return sub_cls
        raise Exception("沒有合適的ObjectAuth類進行分配")

    @abstractmethod
    def gen_temp_access_key(self, bucket, resource):
        raise NotImplementedError()

具體實現

class OOSAuth(ObjectAuth):
    def __init__(self, remote_config) -> None:
        self.read_only_ak = remote_config.get('read_only_ak')
        self.read_only_sk = remote_config.get('read_only_sk')

    def gen_temp_access_key(self, bucket, resource):
        return self.read_only_ak, self.read_only_sk, ''

使用實現類方式

auth = ObjectAuth.dispatch(type)(file_uploader_config)
auth.gen_temp_access_key(bucket, resource)