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from collections.abc import Generator
import oss2 as aliyun_s3
from configs import dify_config
from extensions.storage.base_storage import BaseStorage
class AliyunOssStorage(BaseStorage):
"""Implementation for Aliyun OSS storage."""
def __init__(self):
super().__init__()
self.bucket_name = dify_config.ALIYUN_OSS_BUCKET_NAME
self.folder = dify_config.ALIYUN_OSS_PATH
oss_auth_method = aliyun_s3.Auth
region = None
if dify_config.ALIYUN_OSS_AUTH_VERSION == "v4":
oss_auth_method = aliyun_s3.AuthV4
region = dify_config.ALIYUN_OSS_REGION
oss_auth = oss_auth_method(dify_config.ALIYUN_OSS_ACCESS_KEY, dify_config.ALIYUN_OSS_SECRET_KEY)
self.client = aliyun_s3.Bucket(
oss_auth,
dify_config.ALIYUN_OSS_ENDPOINT,
self.bucket_name,
connect_timeout=30,
region=region,
)
def save(self, filename, data):
self.client.put_object(self.__wrapper_folder_filename(filename), data)
def load_once(self, filename: str) -> bytes:
obj = self.client.get_object(self.__wrapper_folder_filename(filename))
data = obj.read()
return data
def load_stream(self, filename: str) -> Generator:
obj = self.client.get_object(self.__wrapper_folder_filename(filename))
while chunk := obj.read(4096):
yield chunk
def download(self, filename, target_filepath):
self.client.get_object_to_file(self.__wrapper_folder_filename(filename), target_filepath)
def exists(self, filename):
return self.client.object_exists(self.__wrapper_folder_filename(filename))
def delete(self, filename):
self.client.delete_object(self.__wrapper_folder_filename(filename))
def __wrapper_folder_filename(self, filename) -> str:
if self.folder:
if self.folder.endswith("/"):
filename = self.folder + filename
else:
filename = self.folder + "/" + filename
return filename
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