1 files changed, 16 insertions, 0 deletions
diff --git a/toolkit/jetpack/sdk/zip/utils.js b/toolkit/jetpack/sdk/zip/utils.js
new file mode 100644
index 0000000000..e600380cbe
--- /dev/null
+++ b/toolkit/jetpack/sdk/zip/utils.js
@@ -0,0 +1,16 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+"use strict";
+
+const { Cc, Ci } = require("chrome");
+
+function getZipReader(aFile) {
+  return new Promise(resolve => {
+    let zipReader = Cc["@mozilla.org/libjar/zip-reader;1"].
+                        createInstance(Ci.nsIZipReader);
+    zipReader.open(aFile);
+    resolve(zipReader);
+  });
+};
+exports.getZipReader = getZipReader;