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ayunami2000ayunami2000
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‎.gitattributes‎

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# Auto detect text files and perform LF normalization
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* text=auto

‎.gitignore‎

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.gradle
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.idea
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build
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gradle
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libs
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gradlew
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gradlew.bat
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src/main/resources/*.png

‎LICENSE‎

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BSD 3-Clause License
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Copyright (c) 2023, ayunami2000
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation
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and/or other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its
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contributors may be used to endorse or promote products derived from
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this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

‎README.md‎

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# ayunViaProxyEagUtils
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eaglercraft support for viaproxy. ws:// on same port as java. supports both 1.5.2 and 1.8.8 eaglercraft depending on the configuration (e.g. use legacy passthrough & protocolsupport if the backend server doesn't support 1.5.2)
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note: skin files from 1.5.2 are excluded

‎build.gradle‎

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plugins {
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id 'java'
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}
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group 'me.ayunami2000.ayunViaProxyEagUtils'
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version '1.0-SNAPSHOT'
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repositories {
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mavenCentral()
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}
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dependencies {
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implementation files("libs/ViaProxy-3.0.21-SNAPSHOT+java8_PATCHED.jar")
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}

‎settings.gradle‎

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rootProject.name = 'ayunViaProxyEagUtils'
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‎src/main/java/me/ayunami2000/ayunViaProxyEagUtils/EaglerSkinHandler.java‎

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package me.ayunami2000.ayunViaProxyEagUtils;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.ChannelInboundHandlerAdapter;
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import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
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import net.raphimc.vialegacy.protocols.release.protocol1_7_2_5to1_6_4.types.Types1_6_4;
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import net.raphimc.viaproxy.proxy.util.ExceptionUtil;
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import java.io.ByteArrayOutputStream;
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import java.io.DataOutputStream;
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import java.io.IOException;
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import java.nio.charset.StandardCharsets;
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import java.util.HashMap;
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import java.util.UUID;
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import java.util.concurrent.ConcurrentHashMap;
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public class EaglerSkinHandler extends ChannelInboundHandlerAdapter {
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public static final ConcurrentHashMap<UUID, byte[]> skinCollection;
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private static final ConcurrentHashMap<UUID, byte[]> capeCollection;
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private static final ConcurrentHashMap<UUID, Long> lastSkinLayerUpdate;
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private static final int[] SKIN_DATA_SIZE;
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private static final int[] CAPE_DATA_SIZE;
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private static final ConcurrentHashMap<UUID, ChannelHandlerContext> users;
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private final String user;
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private static void sendData(final ChannelHandlerContext ctx, final String channel, final byte[] data) throws IOException {
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final ByteBuf bb = ctx.alloc().buffer();
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bb.writeByte(250);
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try {
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Types1_6_4.STRING.write(bb, channel);
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} catch (Exception e) {
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throw new IOException(e);
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}
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bb.writeShort(data.length);
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bb.writeBytes(data);
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ctx.writeAndFlush(new BinaryWebSocketFrame(bb));
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}
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public EaglerSkinHandler(final String username) {
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this.user = username;
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}
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
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ExceptionUtil.handleNettyException(ctx, cause, null);
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}
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public void channelRead(final ChannelHandlerContext ctx, final Object obj) throws Exception {
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final UUID uuid = UUID.nameUUIDFromBytes(("OfflinePlayer:" + this.user).getBytes(StandardCharsets.UTF_8));
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if (!EaglerSkinHandler.users.containsKey(uuid) && ctx.channel().isActive()) {
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EaglerSkinHandler.users.put(uuid, ctx);
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}
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if (obj instanceof BinaryWebSocketFrame) {
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final ByteBuf bb = ((BinaryWebSocketFrame) obj).content();
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if (bb.readableBytes() >= 3 && bb.readByte() == -6) {
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String tag;
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byte[] msg;
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try {
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tag = Types1_6_4.STRING.read(bb);
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msg = new byte[bb.readShort()];
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bb.readBytes(msg);
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} catch (Exception e) {
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bb.resetReaderIndex();
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super.channelRead(ctx, obj);
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return;
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}
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try {
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if ("EAG|MySkin".equals(tag)) {
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if (!EaglerSkinHandler.skinCollection.containsKey(uuid)) {
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final int t = msg[0] & 0xFF;
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if (t < EaglerSkinHandler.SKIN_DATA_SIZE.length && msg.length == EaglerSkinHandler.SKIN_DATA_SIZE[t] + 1) {
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EaglerSkinHandler.skinCollection.put(uuid, msg);
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}
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}
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bb.release();
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return;
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}
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if ("EAG|MyCape".equals(tag)) {
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if (!EaglerSkinHandler.capeCollection.containsKey(uuid)) {
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final int t = msg[0] & 0xFF;
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if (t < EaglerSkinHandler.CAPE_DATA_SIZE.length && msg.length == EaglerSkinHandler.CAPE_DATA_SIZE[t] + 2) {
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EaglerSkinHandler.capeCollection.put(uuid, msg);
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}
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}
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bb.release();
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return;
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}
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if ("EAG|FetchSkin".equals(tag)) {
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if (msg.length > 2) {
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final String fetch = new String(msg, 2, msg.length - 2, StandardCharsets.UTF_8);
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final UUID uuidFetch = UUID.nameUUIDFromBytes(("OfflinePlayer:" + fetch).getBytes(StandardCharsets.UTF_8));
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byte[] data;
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if ((data = EaglerSkinHandler.skinCollection.get(uuidFetch)) != null) {
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byte[] conc = new byte[data.length + 2];
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conc[0] = msg[0];
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conc[1] = msg[1];
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System.arraycopy(data, 0, conc, 2, data.length);
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if ((data = EaglerSkinHandler.capeCollection.get(uuidFetch)) != null) {
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final byte[] conc2 = new byte[conc.length + data.length];
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System.arraycopy(conc, 0, conc2, 0, conc.length);
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System.arraycopy(data, 0, conc2, conc.length, data.length);
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conc = conc2;
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}
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sendData(ctx, "EAG|UserSkin", conc);
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}
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}
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bb.release();
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return;
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}
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if ("EAG|SkinLayers".equals(tag)) {
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final long millis = System.currentTimeMillis();
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final Long lsu = EaglerSkinHandler.lastSkinLayerUpdate.get(uuid);
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if (lsu != null && millis - lsu < 700L) {
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return;
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}
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EaglerSkinHandler.lastSkinLayerUpdate.put(uuid, millis);
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byte[] conc2;
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if ((conc2 = EaglerSkinHandler.capeCollection.get(uuid)) != null) {
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conc2[1] = msg[0];
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} else {
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conc2 = new byte[]{2, msg[0], 0};
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EaglerSkinHandler.capeCollection.put(uuid, conc2);
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}
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final ByteArrayOutputStream bao = new ByteArrayOutputStream();
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final DataOutputStream dd = new DataOutputStream(bao);
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dd.write(msg[0]);
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dd.writeUTF(this.user);
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final byte[] bpacket = bao.toByteArray();
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for (final UUID pl : EaglerSkinHandler.users.keySet()) {
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if (!pl.equals(uuid)) {
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sendData(EaglerSkinHandler.users.get(pl), "EAG|SkinLayers", bpacket);
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}
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}
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bb.release();
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return;
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}
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} catch (Throwable var18) {
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var18.printStackTrace();
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}
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}
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bb.resetReaderIndex();
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}
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super.channelRead(ctx, obj);
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}
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public void channelInactive(final ChannelHandlerContext ctx) throws Exception {
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super.channelInactive(ctx);
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final UUID uuid = UUID.nameUUIDFromBytes(("OfflinePlayer:" + this.user).getBytes(StandardCharsets.UTF_8));
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EaglerSkinHandler.users.remove(uuid);
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EaglerSkinHandler.skinCollection.remove(uuid);
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EaglerSkinHandler.capeCollection.remove(uuid);
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EaglerSkinHandler.lastSkinLayerUpdate.remove(uuid);
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}
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static {
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skinCollection = new ConcurrentHashMap<>();
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capeCollection = new ConcurrentHashMap<>();
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lastSkinLayerUpdate = new ConcurrentHashMap<>();
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SKIN_DATA_SIZE = new int[]{8192, 16384, -9, -9, 1, 16384, -9};
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CAPE_DATA_SIZE = new int[]{4096, -9, 1};
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users = new ConcurrentHashMap<>();
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}
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}

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