diff --git a/api/api/products/aliyun.py b/api/api/products/aliyun.py
index ebce041..0cafe04 100644
--- a/api/api/products/aliyun.py
+++ b/api/api/products/aliyun.py
@@ -20,6 +20,15 @@ def oss_get(name, bucket=None):
     except oss2.exceptions.NoSuchKey:
         return None
 
+def oss_list(bucket):
+    ret = []
+    for obj in oss_bucket(bucket).list_objects().object_list:
+        ret.append(obj.key)
+    return ret
+
+def oss_delete(name, bucket):
+    oss_bucket(bucket).delete_object(name)
+
 def oss_sign_url(name, method='GET', bucket=None):
     return oss_bucket(bucket).sign_url(method, name.encode(), 24 * 60 * 60)