1 files changed, 49 insertions, 0 deletions
diff --git a/devtools/shared/indexed-db.js b/devtools/shared/indexed-db.js
new file mode 100644
index 0000000000..25cb858142
--- /dev/null
+++ b/devtools/shared/indexed-db.js
@@ -0,0 +1,49 @@
+/* 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";
+
+/**
+ * This indexedDB helper is a simplified version of sdk/indexed-db. It creates a DB with
+ * a principal dedicated to DevTools.
+ */
+
+const PSEUDOURI = "indexeddb://fx-devtools";
+const principaluri = Services.io.newURI(PSEUDOURI);
+const principal = Services.scriptSecurityManager.createContentPrincipal(
+  principaluri,
+  {}
+);
+
+// indexedDB is only exposed to document globals.
+// We are retrieving an instance from a Sandbox, which has to be loaded
+// from the system principal in order to avoid having wrappers around
+// all indexed DB objects.
+const systemPrincipal = Services.scriptSecurityManager.getSystemPrincipal();
+const sandbox = Cu.Sandbox(systemPrincipal, {
+  wantGlobalProperties: ["indexedDB"],
+});
+const { indexedDB } = sandbox;
+
+module.exports = Object.freeze({
+  /**
+   * Only the standard version of indexedDB.open is supported.
+   */
+  open(name, version) {
+    const options = {};
+    if (typeof version === "number") {
+      options.version = version;
+    }
+    return indexedDB.openForPrincipal(principal, name, options);
+  },
+
+  /**
+   * Only the standard version of indexedDB.deleteDatabase is supported.
+   */
+  deleteDatabase(name) {
+    return indexedDB.deleteForPrincipal(principal, name);
+  },
+
+  cmp: indexedDB.cmp.bind(indexedDB),
+});