dify

dify/api/extensions/storage/aliyun_oss_storage.py

@@ -0,0 +1,56 @@
+import posixpath
+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()
+        if not isinstance(data, bytes):
+            return b""
+        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: str, target_filepath):
+        self.client.get_object_to_file(self.__wrapper_folder_filename(filename), target_filepath)
+
+    def exists(self, filename: str):
+        return self.client.object_exists(self.__wrapper_folder_filename(filename))
+
+    def delete(self, filename: str):
+        self.client.delete_object(self.__wrapper_folder_filename(filename))
+
+    def __wrapper_folder_filename(self, filename: str) -> str:
+        return posixpath.join(self.folder, filename) if self.folder else filename