If there is only one folder at the root of the zip, consider it as root

gadget/gadget_landing_cribjs.js

@@ -16,7 +16,22 @@
     if (logFunction === undefined) {
       logFunction = console.log;
     }
-    var promise_list = [], url_number = 0;
+    var promise_list = [], url_number = 0, path_list = [], root_path = "", i;
+    zip.forEach(function (relativePath, zipEntry) {
+      path_list.push(relativePath);
+    });
+    if (path_list) {
+      root_path = path_list[0].split("/")[0];
+    }
+    for (i = 0; i < path_list.length - 1; i++) {
+      if (root_path !== path_list[i].split("/")[0]) {
+        root_path = "";
+        break;
+      }
+    }
+    if (root_path !== "" && !from_path) {
+      from_path = root_path;
+    }
     zip.forEach(function (relativePath, zipEntry) {
       var end_url;
       url_number += 1;