init

user/plugins/admin/themes/grav/app/utils/keepalive.js

@@ -0,0 +1,34 @@
+import { config } from 'grav-config';
+import { userFeedbackError } from './response';
+
+const MAX_SAFE_DELAY = 2147483647;
+
+class KeepAlive {
+    constructor() {
+        this.active = false;
+    }
+
+    start() {
+        let timeout = config.admin_timeout / 1.5 * 1000;
+        this.timer = setInterval(() => this.fetch(), Math.min(timeout, MAX_SAFE_DELAY));
+        this.active = true;
+    }
+
+    stop() {
+        clearInterval(this.timer);
+        this.active = false;
+    }
+
+    fetch() {
+        let data = new FormData();
+        data.append('admin-nonce', config.admin_nonce);
+
+        fetch(`${config.base_url_relative}/task${config.param_sep}keepAlive`, {
+            credentials: 'same-origin',
+            method: 'post',
+            body: data
+        }).catch(userFeedbackError);
+    }
+}
+
+export default new KeepAlive();