1 files changed, 40 insertions, 0 deletions
diff --git a/ext/bg/js/request.js b/ext/bg/js/request.js
new file mode 100644
index 00000000..94fd135a
--- /dev/null
+++ b/ext/bg/js/request.js
@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2017  Alex Yatskov <alex@foosoft.net>
+ * Author: Alex Yatskov <alex@foosoft.net>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+
+function requestJson(url, action, params) {
+    return new Promise((resolve, reject) => {
+        const xhr = new XMLHttpRequest();
+        xhr.overrideMimeType('application/json');
+        xhr.addEventListener('load', () => resolve(xhr.responseText));
+        xhr.addEventListener('error', () => reject('failed to execute network request'));
+        xhr.open(action, url);
+        if (params) {
+            xhr.send(JSON.stringify(params));
+        } else {
+            xhr.send();
+        }
+    }).then(responseText => {
+        try {
+            return JSON.parse(responseText);
+        }
+        catch (e) {
+            return Promise.reject('invalid JSON response');
+        }
+    });
+}