From 63e169c139b1627da09b73b4d24e8a7716fdc15c Mon Sep 17 00:00:00 2001
From: Dan Stillman <dstillman@zotero.org>
Date: Wed, 24 Feb 2016 21:50:06 -0500
Subject: [PATCH] Only show empty-response-from-server error for 0 or 200
 status codes

---
 chrome/content/zotero/xpcom/sync/syncAPIClient.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/chrome/content/zotero/xpcom/sync/syncAPIClient.js b/chrome/content/zotero/xpcom/sync/syncAPIClient.js
index b56439e38..d252f960b 100644
--- a/chrome/content/zotero/xpcom/sync/syncAPIClient.js
+++ b/chrome/content/zotero/xpcom/sync/syncAPIClient.js
@@ -626,7 +626,7 @@ Zotero.Sync.APIClient.prototype = {
 	_checkConnection: function (xmlhttp, channel) {
 		const Ci = Components.interfaces;
 		
-		if (!xmlhttp.responseText) {
+		if (!xmlhttp.responseText && (xmlhttp.status == 0 || xmlhttp.status == 200)) {
 			let msg = null;
 			let dialogButtonText = null;
 			let dialogButtonCallback = null;