From 9b087f62f93a0b2ef0f00b576dc9f697440c2890 Mon Sep 17 00:00:00 2001
From: Gerhard Hoffmann <g.hoffmann@atb-online.eu>
Date: Sat, 17 Feb 2024 08:04:06 +0100
Subject: [PATCH] Check if json-file to be downloaded to device-controller is
 empty before starting a download.

---
 update.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/update.cpp b/update.cpp
index 0284b56..6f95e32 100644
--- a/update.cpp
+++ b/update.cpp
@@ -414,7 +414,7 @@ bool Update::downloadJson(enum FileTypeJson type,
         QFileInfo fi(jsFileToSendToDC); // max. size of template file is 800 bytes
         if (file.exists()) {
             if (file.open(QIODevice::ReadOnly)) {
-                if (fi.size() <= 800) {
+                if (fi.size() > 0 && fi.size() <= 800) {
                     QByteArray ba = file.readAll();
                     // kindOfFile: 1=config, 2=device, 3=cash, 4=serial, 5=time, 6=printer
                     //      nrOfTemplate=1...32 if kindOfFile==6