1 files changed, 65 insertions, 0 deletions
diff --git a/patches/server/0378-Add-Raw-Byte-ItemStack-Serialization.patch b/patches/server/0378-Add-Raw-Byte-ItemStack-Serialization.patch
new file mode 100644
index 0000000000..c6976b5d11
--- /dev/null
+++ b/patches/server/0378-Add-Raw-Byte-ItemStack-Serialization.patch
@@ -0,0 +1,65 @@
+From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
+From: Mariell Hoversholm <[email protected]>
+Date: Thu, 30 Apr 2020 16:56:54 +0200
+Subject: [PATCH] Add Raw Byte ItemStack Serialization
+
+Serializes using NBT which is safer for server data migrations than bukkits format.
+
+diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+index 6888548989e6b841d2389011f05c5eadb754e532..3b4764986302194882e009fe20a9d6406cf2be8e 100644
+--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
++++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+@@ -431,6 +431,53 @@ public final class CraftMagicNumbers implements UnsafeValues {
+     public boolean isSupportedApiVersion(String apiVersion) {
+         return apiVersion != null && SUPPORTED_API.contains(apiVersion);
+     }
++
++    @Override
++    public byte[] serializeItem(ItemStack item) {
++        Preconditions.checkNotNull(item, "null cannot be serialized");
++        Preconditions.checkArgument(item.getType() != Material.AIR, "air cannot be serialized");
++
++        return serializeNbtToBytes((item instanceof CraftItemStack ? ((CraftItemStack) item).handle : CraftItemStack.asNMSCopy(item)).save(new CompoundTag()));
++    }
++
++    @Override
++    public ItemStack deserializeItem(byte[] data) {
++        Preconditions.checkNotNull(data, "null cannot be deserialized");
++        Preconditions.checkArgument(data.length > 0, "cannot deserialize nothing");
++
++        CompoundTag compound = deserializeNbtFromBytes(data);
++        int dataVersion = compound.getInt("DataVersion");
++        Dynamic<Tag> converted = DataFixers.getDataFixer().update(References.ITEM_STACK, new Dynamic<Tag>(NbtOps.INSTANCE, compound), dataVersion, getDataVersion());
++        return CraftItemStack.asCraftMirror(net.minecraft.world.item.ItemStack.of((CompoundTag) converted.getValue()));
++    }
++
++    private byte[] serializeNbtToBytes(CompoundTag compound) {
++        compound.putInt("DataVersion", getDataVersion());
++        java.io.ByteArrayOutputStream outputStream = new java.io.ByteArrayOutputStream();
++        try {
++            net.minecraft.nbt.NbtIo.writeCompressed(
++                compound,
++                outputStream
++            );
++        } catch (IOException ex) {
++            throw new RuntimeException(ex);
++        }
++        return outputStream.toByteArray();
++    }
++
++    private CompoundTag deserializeNbtFromBytes(byte[] data) {
++        CompoundTag compound;
++        try {
++            compound = net.minecraft.nbt.NbtIo.readCompressed(
++                new java.io.ByteArrayInputStream(data)
++            );
++        } catch (IOException ex) {
++            throw new RuntimeException(ex);
++        }
++        int dataVersion = compound.getInt("DataVersion");
++        Preconditions.checkArgument(dataVersion <= getDataVersion(), "Newer version! Server downgrades are not supported!");
++        return compound;
++    }
+     // Paper end
+ 
+     /**