slight cleanup

code/app.py

@@ -210,7 +210,7 @@ def download_file(token, name):
     """
     check for file expiry, and send file if allowed
     """
-    full_path = os.path.join(app.config["DATAFOLDER"], token, name)
+    full_path = file_full_path(token, name)
     if not os.path.exists(full_path):
         return "Error", 404
     db_stat = db_get_file(token, name)