PaperMC/CraftBukkit-Patches/0146-Only-fetch-an-online-UUID-in-online-mode.patch

From 2c388c7f705c6615e19692e82ccf20a4c47f79a8 Mon Sep 17 00:00:00 2001
From: Maxim Van de Wynckel <maxim_vdw@hotmail.com>
Date: Wed, 30 Jul 2014 01:19:51 +0200
Subject: [PATCH] Only fetch an online UUID in online mode

The previous code would get an online UUID even in offline mode that
breaks plugins if the player joins.

Example:
You want to store data for player "Test"  who never joined. An online UUID is created and you save it using that UUID.

The player Test joins with an offline UUID but that will not match the online UUID of the saved data.

diff --git a/src/main/java/org/bukkit/craftbukkit/CraftServer.java b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
index 899982b..57bd4f1 100644
--- a/src/main/java/org/bukkit/craftbukkit/CraftServer.java
+++ b/src/main/java/org/bukkit/craftbukkit/CraftServer.java
@@ -1275,8 +1275,14 @@ public final class CraftServer implements Server {
 
         OfflinePlayer result = getPlayerExact(name);
         if (result == null) {
-            // This is potentially blocking :(
-            GameProfile profile = MinecraftServer.getServer().getUserCache().getProfile(name);
+            // Spigot Start
+            GameProfile profile = null;
+            // Only fetch an online UUID in online mode
+            if ( MinecraftServer.getServer().getOnlineMode() || org.spigotmc.SpigotConfig.bungee )
+            {
+                profile = MinecraftServer.getServer().getUserCache().getProfile( name );
+            }
+            // Spigot end
             if (profile == null) {
                 // Make an OfflinePlayer using an offline mode UUID since the name has no profile
                 result = getOfflinePlayer(new GameProfile(UUID.nameUUIDFromBytes(("OfflinePlayer:" + name).getBytes(Charsets.UTF_8)), name));
-- 
2.1.0