From 4e552ae5b2c98d96b0df1a3f92bfb6f4aa22b1f0 Mon Sep 17 00:00:00 2001
From: IrinaMalysheva <irina.malysheva@onlyoffice.com>
Date: Fri, 18 Jun 2021 14:22:13 +0300
Subject: [PATCH] More messages for /revision errors.

---
 Web/App_Code/DebugInfo.cs       |  4 ++++
 Web/App_Code/RevisionHandler.cs | 10 ++++++++--
 2 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/Web/App_Code/DebugInfo.cs b/Web/App_Code/DebugInfo.cs
index 8ba64204c..6e481f1ff 100644
--- a/Web/App_Code/DebugInfo.cs
+++ b/Web/App_Code/DebugInfo.cs
@@ -57,6 +57,10 @@ public class DebugInfo
             }
         }
 
+        if (!File.Exists(ChangeLogFilePath)) {
+            return "changelog.xml doesn't exist";
+        }
+
         var ChangeLogPatternFilePath = Path.Combine(basePath, TemplateName);
 
         var xmlLog = new XmlDocument();
diff --git a/Web/App_Code/RevisionHandler.cs b/Web/App_Code/RevisionHandler.cs
index 9cca99912..48f1583cc 100644
--- a/Web/App_Code/RevisionHandler.cs
+++ b/Web/App_Code/RevisionHandler.cs
@@ -12,15 +12,17 @@ namespace TeamLab.HttpHandlers
             get { return false; }
         }
 
+        public string result;
+
         public void ProcessRequest(HttpContext context)
         {
             var DebugString = DebugInfo.DebugString;
-            string result = "result's empty";
             if (!String.IsNullOrEmpty(DebugString))
             {
                 result = DebugString;
             }
-            else {
+            else
+            {
                 if (DebugString == null)
                 {
                     result = "DebugString's null";
@@ -30,6 +32,10 @@ namespace TeamLab.HttpHandlers
                     result = DebugInfo.GetStaticDebugString();
                 }
             }
+            if (result == String.Empty)
+            {
+                result = "result's empty";
+            }
             context.Response.Write(result);
         }
     }