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Add Raw Byte ItemStack Serialization 

Serializes using NBT which is safer for server data migrations than bukkits format.
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Mariell Hoversholm 2020-04-30 16:59:24 +02:00 committed by Aikar
parent df43f82838
commit 6f196fe701
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2 changed files with 157 additions and 0 deletions
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55
Spigot-API-Patches/0208-Add-Raw-Byte-ItemStack-Serialization.patch Normal file
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@ -0,0 +1,55 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mariell Hoversholm <proximyst@proximyst.com>
Date: Thu, 30 Apr 2020 16:56:31 +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/UnsafeValues.java b/src/main/java/org/bukkit/UnsafeValues.java
index 821064264405cde147e944df279b44a20a4868ad..4fa00140cf17e3ea7d602b6337b3fe4f2901202e 100644
--- a/src/main/java/org/bukkit/UnsafeValues.java
+++ b/src/main/java/org/bukkit/UnsafeValues.java
@@ -89,5 +89,9 @@ public interface UnsafeValues {
static boolean isLegacyPlugin(org.bukkit.plugin.Plugin plugin) {
return !Bukkit.getUnsafe().isSupportedApiVersion(plugin.getDescription().getAPIVersion());
}
+
+ byte[] serializeItem(ItemStack item);
+
+ ItemStack deserializeItem(byte[] data);
// Paper end
}
diff --git a/src/main/java/org/bukkit/inventory/ItemStack.java b/src/main/java/org/bukkit/inventory/ItemStack.java
index d7d6a3e83dfd88359708749f5c12be02815c3580..ccd81fca25233c2a9c2a8c3f4dda3053d7b2e723 100644
--- a/src/main/java/org/bukkit/inventory/ItemStack.java
+++ b/src/main/java/org/bukkit/inventory/ItemStack.java
@@ -613,6 +613,29 @@ public class ItemStack implements Cloneable, ConfigurationSerializable {
return Bukkit.getServer().getItemFactory().ensureServerConversions(this);
}
+ /**
+ * Deserializes this itemstack from raw NBT bytes. NBT is safer for data migrations as it will
+ * use the built in data converter instead of bukkits dangerous serialization system.
+ *
+ * This expects that the DataVersion was stored on the root of the Compound, as saved from
+ * the {@link #serializeAsBytes()} API returned.
+ * @return ItemStack migrated to this version of Minecraft if needed.
+ */
+ @NotNull
+ public static ItemStack deserializeBytes(@NotNull byte[] bytes) {
+ return org.bukkit.Bukkit.getUnsafe().deserializeItem(bytes);
+ }
+
+ /**
+ * Serializes this itemstack to raw bytes in NBT. NBT is safer for data migrations as it will
+ * use the built in data converter instead of bukkits dangerous serialization system.
+ * @return bytes representing this item in NBT.
+ */
+ @NotNull
+ public byte[] serializeAsBytes() {
+ return org.bukkit.Bukkit.getUnsafe().serializeItem(this);
+ }
+
/**
* Gets the Display name as seen in the Client.
* Currently the server only supports the English language. To override this,

102
Spigot-Server-Patches/0529-Add-Raw-Byte-ItemStack-Serialization.patch Normal file
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@ -0,0 +1,102 @@
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Mariell Hoversholm <proximyst@proximyst.com>
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/net/minecraft/server/DataConverterRegistry.java b/src/main/java/net/minecraft/server/DataConverterRegistry.java
index 77c77973bb335cc89dae31bef2bbbcd4adc1d14b..d957d5fc2dc724cdda553e3a67ffe65e1e41c304 100644
--- a/src/main/java/net/minecraft/server/DataConverterRegistry.java
+++ b/src/main/java/net/minecraft/server/DataConverterRegistry.java
@@ -22,6 +22,7 @@ public class DataConverterRegistry {
return datafixerbuilder.build(SystemUtils.e());
}
+ public static DataFixer getDataFixer() { return a(); } // Paper - OBFHELPER
public static DataFixer a() {
return DataConverterRegistry.c;
}
diff --git a/src/main/java/net/minecraft/server/ItemStack.java b/src/main/java/net/minecraft/server/ItemStack.java
index d6e43313bf0c678cf78fe77de2f8f4b6f819e3f4..ea60880c6f15b1a39579896d78cf641563621aa4 100644
--- a/src/main/java/net/minecraft/server/ItemStack.java
+++ b/src/main/java/net/minecraft/server/ItemStack.java
@@ -140,6 +140,7 @@ public final class ItemStack {
this.checkEmpty();
}
+ public static ItemStack fromCompound(NBTTagCompound nbttagcompound) { return a(nbttagcompound); } // Paper - OBFHELPER
public static ItemStack a(NBTTagCompound nbttagcompound) {
try {
return new ItemStack(nbttagcompound);
diff --git a/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java b/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java
index 2322c0c8c5aacebb6317eab8ce4245554f6d9d55..3e6f878cdbbf5ebfa7fb390745ead135c1c4dee8 100644
--- a/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java
+++ b/src/main/java/net/minecraft/server/NBTCompressedStreamTools.java
@@ -14,6 +14,7 @@ import java.util.zip.GZIPOutputStream;
public class NBTCompressedStreamTools {
+ public static NBTTagCompound readNBT(InputStream inputstream) throws IOException { return a(inputstream); } // Paper - OBFHELPER
public static NBTTagCompound a(InputStream inputstream) throws IOException {
DataInputStream datainputstream = new DataInputStream(new BufferedInputStream(new GZIPInputStream(inputstream)));
Throwable throwable = null;
@@ -43,6 +44,7 @@ public class NBTCompressedStreamTools {
return nbttagcompound;
}
+ public static void writeNBT(NBTTagCompound nbttagcompound, OutputStream outputstream) throws IOException { a(nbttagcompound, outputstream); } // Paper - OBFHELPER
public static void a(NBTTagCompound nbttagcompound, OutputStream outputstream) throws IOException {
DataOutputStream dataoutputstream = new DataOutputStream(new BufferedOutputStream(new GZIPOutputStream(outputstream)));
Throwable throwable = null;
diff --git a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
index 770375ed4207920e71d2d0799c611c4b3cdbe6f7..aa8f135250338452c6143d41cca9aaea886ba31f 100644
--- a/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
+++ b/src/main/java/org/bukkit/craftbukkit/util/CraftMagicNumbers.java
@@ -313,6 +313,46 @@ 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");
+
+ java.io.ByteArrayOutputStream outputStream = new java.io.ByteArrayOutputStream();
+ NBTTagCompound compound = (item instanceof CraftItemStack ? ((CraftItemStack) item).getHandle() : CraftItemStack.asNMSCopy(item)).save(new NBTTagCompound());
+ compound.setInt("DataVersion", getDataVersion());
+ try {
+ net.minecraft.server.NBTCompressedStreamTools.writeNBT(
+ compound,
+ outputStream
+ );
+ } catch (IOException ex) {
+ throw new RuntimeException(ex);
+ }
+
+ return outputStream.toByteArray();
+ }
+
+ @Override
+ public ItemStack deserializeItem(byte[] data) {
+ Preconditions.checkNotNull(data, "null cannot be deserialized");
+ Preconditions.checkArgument(data.length > 0, "cannot deserialize nothing");
+
+ try {
+ NBTTagCompound compound = net.minecraft.server.NBTCompressedStreamTools.readNBT(
+ new java.io.ByteArrayInputStream(data)
+ );
+ int dataVersion = compound.getInt("DataVersion");
+
+ Preconditions.checkArgument(dataVersion < getDataVersion(), "Newer version! Server downgrades are not supported!");
+ Dynamic<NBTBase> converted = DataConverterRegistry.getDataFixer().update(DataConverterTypes.ITEM_STACK, new Dynamic<NBTBase>(DynamicOpsNBT.a, compound), -1, getDataVersion());
+ return CraftItemStack.asCraftMirror(net.minecraft.server.ItemStack.fromCompound((NBTTagCompound) converted.getValue()));
+ } catch (IOException ex) {
+ com.destroystokyo.paper.util.SneakyThrow.sneaky(ex);
+ throw new RuntimeException();
+ }
+ }
// Paper end
/**