From 982f358bf37b69ac1d99887887d71fe86226a2fb Mon Sep 17 00:00:00 2001
From: ReinforceZwei <39955851+ReinforceZwei@users.noreply.github.com>
Date: Sat, 10 Jul 2021 19:28:39 +0800
Subject: [PATCH] ResourcePackSend: Add URL checking for invalid resource pack

---
 MinecraftClient/Protocol/Handlers/Protocol18.cs | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/MinecraftClient/Protocol/Handlers/Protocol18.cs b/MinecraftClient/Protocol/Handlers/Protocol18.cs
index 627ad897..3fec7721 100644
--- a/MinecraftClient/Protocol/Handlers/Protocol18.cs
+++ b/MinecraftClient/Protocol/Handlers/Protocol18.cs
@@ -860,7 +860,7 @@ namespace MinecraftClient.Protocol.Handlers
                             String forcedMessage = ChatParser.ParseText(dataTypes.ReadNextString(packetData));
                         }
                         // Some server plugins may send invalid resource packs to probe the client and we need to ignore them (issue #1056)
-                        if (hash.Length != 40)
+                        if (!url.StartsWith("http") && hash.Length != 40) // Some server may have null hash value
                             break;
                         //Send back "accepted" and "successfully loaded" responses for plugins or server config making use of resource pack mandatory
                         byte[] responseHeader = new byte[0];