From 04d83bf277f1500fbc2660c0df5991735beee726 Mon Sep 17 00:00:00 2001
From: ReinforceZwei <39955851+ReinforceZwei@users.noreply.github.com>
Date: Fri, 17 Dec 2021 09:29:24 +0800
Subject: [PATCH] SessionCache: Add backward compatibility for old session file

---
 MinecraftClient/Protocol/Session/SessionToken.cs | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/MinecraftClient/Protocol/Session/SessionToken.cs b/MinecraftClient/Protocol/Session/SessionToken.cs
index 36669d5b..1df0cb44 100644
--- a/MinecraftClient/Protocol/Session/SessionToken.cs
+++ b/MinecraftClient/Protocol/Session/SessionToken.cs
@@ -41,7 +41,11 @@ namespace MinecraftClient.Protocol.Session
             session.PlayerName = fields[1];
             session.PlayerID = fields[2];
             session.ClientID = fields[3];
-            session.RefreshToken = fields[4];
+            // Backward compatible with old session file without refresh token field
+            if (fields.Length > 4)
+                session.RefreshToken = fields[4];
+            else
+                session.RefreshToken = String.Empty;
 
             Guid temp;
             if (!JwtRegex.IsMatch(session.ID))