update

backend/view/download.py

@@ -56,7 +56,7 @@ def get():
         print(message)
         # 读取epk文件，按照格式返回相应结构体数据
         ret = ""
-        if os.path.exists(result):
+        if isinstance(result, str) and os.path.exists(result):
             with open(result, "rb") as f:
                 ret = f.read()
             return ret