PaperMC/Spigot-Server-Patches/0374-Catch-JsonParseException-in-Entity-and-TE-names.patch

From d1f048e1a9846bf688bd9f099cdb00ae37fb4990 Mon Sep 17 00:00:00 2001
From: Zach Brown <zach.brown@destroystokyo.com>
Date: Sat, 22 Sep 2018 15:56:59 -0400
Subject: [PATCH] Catch JsonParseException in Entity and TE names

As a result, data that no longer parses correctly will not crash the server
instead just logging the exception and continuing (and in most cases should
fix the data)

Player data is fixed pretty much immediately but some block data (like
Shulkers) may need to be changed in order for it to re-save properly

No more crashing though.

diff --git a/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java b/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
index 729859d132..2a1dffbf48 100644
--- a/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
+++ b/src/main/java/net/minecraft/server/CommandBlockListenerAbstract.java
@@ -57,7 +57,7 @@ public abstract class CommandBlockListenerAbstract implements ICommandListener {
         this.g = nbttagcompound.getString("Command");
         this.d = nbttagcompound.getInt("SuccessCount");
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.h = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.h = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
         if (nbttagcompound.hasKeyOfType("TrackOutput", 1)) {
diff --git a/src/main/java/net/minecraft/server/Entity.java b/src/main/java/net/minecraft/server/Entity.java
index c45c52084a..0237049a40 100644
--- a/src/main/java/net/minecraft/server/Entity.java
+++ b/src/main/java/net/minecraft/server/Entity.java
@@ -1733,7 +1733,7 @@ public abstract class Entity implements INamableTileEntity, ICommandListener, Ke
             this.setPosition(this.locX, this.locY, this.locZ);
             this.setYawPitch(this.yaw, this.pitch);
             if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-                this.setCustomName(IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName")));
+                this.setCustomName(MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound)); // Paper - Catch ParseException
             }
 
             this.setCustomNameVisible(nbttagcompound.getBoolean("CustomNameVisible"));
diff --git a/src/main/java/net/minecraft/server/MCUtil.java b/src/main/java/net/minecraft/server/MCUtil.java
index f7856897f6..e11f439ff1 100644
--- a/src/main/java/net/minecraft/server/MCUtil.java
+++ b/src/main/java/net/minecraft/server/MCUtil.java
@@ -363,4 +363,19 @@ public final class MCUtil {
                 return null;
         }
     }
+
+    @Nullable
+    public static IChatBaseComponent getBaseComponentFromNbt(String key, NBTTagCompound compound) {
+        if (!compound.hasKey(key)) {
+            return null;
+        }
+        String string = compound.getString(key);
+        try {
+            return IChatBaseComponent.ChatSerializer.jsonToComponent(string);
+        } catch (com.google.gson.JsonParseException e) {
+            org.bukkit.Bukkit.getLogger().warning("Unable to parse " + key + " from " + compound +": " + e.getMessage());
+        }
+
+        return null;
+    }
 }
diff --git a/src/main/java/net/minecraft/server/TileEntityBanner.java b/src/main/java/net/minecraft/server/TileEntityBanner.java
index b4fae0d307..364a9fa7a9 100644
--- a/src/main/java/net/minecraft/server/TileEntityBanner.java
+++ b/src/main/java/net/minecraft/server/TileEntityBanner.java
@@ -74,7 +74,7 @@ public class TileEntityBanner extends TileEntity implements INamableTileEntity {
     public void load(NBTTagCompound nbttagcompound) {
         super.load(nbttagcompound);
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.a = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.a = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
         if (this.hasWorld()) {
diff --git a/src/main/java/net/minecraft/server/TileEntityBrewingStand.java b/src/main/java/net/minecraft/server/TileEntityBrewingStand.java
index 480faa66e4..f3ddb86d04 100644
--- a/src/main/java/net/minecraft/server/TileEntityBrewingStand.java
+++ b/src/main/java/net/minecraft/server/TileEntityBrewingStand.java
@@ -236,7 +236,7 @@ public class TileEntityBrewingStand extends TileEntityContainer implements IWorl
         ContainerUtil.b(nbttagcompound, this.items);
         this.brewTime = nbttagcompound.getShort("BrewTime");
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.k = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.k = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
         this.fuelLevel = nbttagcompound.getByte("Fuel");
diff --git a/src/main/java/net/minecraft/server/TileEntityChest.java b/src/main/java/net/minecraft/server/TileEntityChest.java
index 7594c16e99..8037930727 100644
--- a/src/main/java/net/minecraft/server/TileEntityChest.java
+++ b/src/main/java/net/minecraft/server/TileEntityChest.java
@@ -83,7 +83,7 @@ public class TileEntityChest extends TileEntityLootable { // Paper - Remove ITic
         }
 
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.i = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.i = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
     }
diff --git a/src/main/java/net/minecraft/server/TileEntityDispenser.java b/src/main/java/net/minecraft/server/TileEntityDispenser.java
index ddd2e0eb0b..21bd156e91 100644
--- a/src/main/java/net/minecraft/server/TileEntityDispenser.java
+++ b/src/main/java/net/minecraft/server/TileEntityDispenser.java
@@ -107,7 +107,7 @@ public class TileEntityDispenser extends TileEntityLootable {
         }
 
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.i = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.i = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
     }
diff --git a/src/main/java/net/minecraft/server/TileEntityFurnace.java b/src/main/java/net/minecraft/server/TileEntityFurnace.java
index a537d35b73..f6bc6403fb 100644
--- a/src/main/java/net/minecraft/server/TileEntityFurnace.java
+++ b/src/main/java/net/minecraft/server/TileEntityFurnace.java
@@ -219,7 +219,7 @@ public class TileEntityFurnace extends TileEntityContainer implements IWorldInve
         }
 
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.l = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.l = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
         // Paper start - cook speed API
diff --git a/src/main/java/net/minecraft/server/TileEntityHopper.java b/src/main/java/net/minecraft/server/TileEntityHopper.java
index a8cf160fe4..c56422170c 100644
--- a/src/main/java/net/minecraft/server/TileEntityHopper.java
+++ b/src/main/java/net/minecraft/server/TileEntityHopper.java
@@ -61,7 +61,7 @@ public class TileEntityHopper extends TileEntityLootable implements IHopper, ITi
         }
 
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.setCustomName(IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName")));
+            this.setCustomName(MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound)); // Paper - Catch ParseException
         }
 
         this.f = nbttagcompound.getInt("TransferCooldown");
diff --git a/src/main/java/net/minecraft/server/TileEntityShulkerBox.java b/src/main/java/net/minecraft/server/TileEntityShulkerBox.java
index df9a30560c..65a6854521 100644
--- a/src/main/java/net/minecraft/server/TileEntityShulkerBox.java
+++ b/src/main/java/net/minecraft/server/TileEntityShulkerBox.java
@@ -254,7 +254,7 @@ public class TileEntityShulkerBox extends TileEntityLootable implements IWorldIn
         }
 
         if (nbttagcompound.hasKeyOfType("CustomName", 8)) {
-            this.i = IChatBaseComponent.ChatSerializer.a(nbttagcompound.getString("CustomName"));
+            this.i = MCUtil.getBaseComponentFromNbt("CustomName", nbttagcompound); // Paper - Catch ParseException
         }
 
     }
-- 
2.19.0