do not reload the page if the server is (temporarily) unreachable

1 files changed, 19 insertions, 1 deletions

diff --git a/core/js/js.js b/core/js/js.js
index 67487ec979c..4b09cc49038 100644
--- a/core/js/js.js
+++ b/core/js/js.js
@@ -730,6 +730,17 @@ var OC={
 	},
 
 	/**
+	 * Warn users that the connection to the server was lost temporarily
+	 *
+	 * This function is throttled to prevent stacked notfications.
+	 * After 7sec the first notification is gone, then we can show another one
+	 * if necessary.
+	 */
+	_ajaxConnectionLostHandler: _.throttle(function() {
+		OC.Notification.showTemporary(t('core', 'Connection to server lost'));
+	}, 7 * 1000, {trailing: false}),
+
+	/**
 	 * Process ajax error, redirects to main page
 	 * if an error/auth error status was returned.
 	 */
@@ -742,7 +753,7 @@ var OC={
 			return;
 		}
 
-		if (_.contains([0, 302, 303, 307, 401], xhr.status)) {
+		if (_.contains([302, 303, 307, 401], xhr.status)) {
 			// sometimes "beforeunload" happens later, so need to defer the reload a bit
 			setTimeout(function() {
 				if (!self._userIsNavigatingAway && !self._reloadCalled) {
@@ -752,6 +763,13 @@ var OC={
 					self._reloadCalled = true;
 				}
 			}, 100);
+		} else if(xhr.status === 0) {
+			// Connection lost (e.g. WiFi disconnected or server is down)
+			setTimeout(function() {
+				if (!self._userIsNavigatingAway && !self._reloadCalled) {
+					self._ajaxConnectionLostHandler();
+				}
+			}, 100);
 		}
 	},