update project structure

mirai-core/pom.xml

@@ -38,6 +38,13 @@
         <relativePath>../pom.xml</relativePath>
     </parent>
 
+    <dependencies>
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+        </dependency>
+    </dependencies>
+
     <build>
 
         <resources>

mirai-core/src/main/java/net/mamoe/mirai/network/Network.java

+package net.mamoe.mirai.network;
+
+import io.netty.bootstrap.ServerBootstrap;
+import io.netty.channel.ChannelInitializer;
+import io.netty.channel.ChannelPipeline;
+import io.netty.channel.EventLoopGroup;
+import io.netty.channel.nio.NioEventLoopGroup;
+import io.netty.channel.socket.SocketChannel;
+import io.netty.channel.socket.nio.NioServerSocketChannel;
+import io.netty.handler.codec.bytes.ByteArrayDecoder;
+import io.netty.handler.codec.bytes.ByteArrayEncoder;
+
+/**
+ * JPRE 网络层启动器.
+ * 本类用于启动网络服务器. 包接受器请参考 {@link NetworkPacketHandler}
+ * (插件请不要使用本类, 用了也会因端口占用而抛出异常)
+ *
+ * @author Him188 @ JPRE Project
+ */
+public final class Network {
+    private static ServerBootstrap server;
+
+    /**
+     * 启动网络服务器. 会阻塞线程直到关闭网络服务器.
+     *
+     * @param port 端口号
+     * @throws RuntimeException 服务器已经启动时抛出
+     */
+    public static void start(int port) throws InterruptedException {
+        if (server != null) {
+            throw new RuntimeException("there is already a ServerBootstrap instance");
+        }
+
+        EventLoopGroup bossGroup = new NioEventLoopGroup();
+        EventLoopGroup workerGroup = new NioEventLoopGroup();
+        try {
+            server = new ServerBootstrap();
+            server.group(bossGroup, workerGroup);
+            server.channel(NioServerSocketChannel.class);
+            //b.option(ChannelOption.SO_BACKLOG, 100);
+            //b.handler(new LoggingHandler(LogLevel.INFO));
+            server.childHandler(new ChannelInitializer<SocketChannel>() {
+                @Override
+                protected void initChannel(SocketChannel ch) throws Exception {
+                    ChannelPipeline pipeline = ch.pipeline();
+                    pipeline.addLast("bytesDecoder", new ByteArrayDecoder());
+                    pipeline.addLast("bytesEncoder", new ByteArrayEncoder());
+                    pipeline.addLast("handler", new NetworkPacketHandler());
+                }
+            });
+
+            server.bind(port).sync().channel().closeFuture().sync();
+        } finally {
+            bossGroup.shutdownGracefully();
+            workerGroup.shutdownGracefully();
+        }
+    }
+}

mirai-core/src/main/java/net/mamoe/mirai/network/NetworkPacketHandler.java

+package net.mamoe.mirai.network;
+
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.SimpleChannelInboundHandler;
+
+import java.io.IOException;
+import java.net.InetSocketAddress;
+
+/**
+ * 网络数据包接收器. 该类属于网络层, 插件一般不需要使用
+ *
+ * @author Him188 @ JPRE Project
+ */
+public class NetworkPacketHandler extends SimpleChannelInboundHandler<byte[]> {
+    @Override
+    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
+        super.channelRead(ctx, msg);
+    }
+
+    @Override
+    protected void channelRead0(ChannelHandlerContext ctx, byte[] data) throws Exception {
+        synchronized (this) {
+            handlePacket(ctx, data);
+        }
+    }
+
+    private byte[] temp = new byte[0];
+
+
+    /**
+     * Synchronized by {@code synchronized (this)} in {@link #channelRead0}
+     */
+    private void handlePacket(ChannelHandlerContext ctx, byte[] data) {
+        try {
+            temp = Utils.arrayAppend(temp, data);
+            while (temp.length != 0) {
+                int position = Utils.arraySearch(temp, Protocol.SIGNATURE);
+                if (position < 0) {
+                    return;//收到的是子包, 数据未结尾
+                }
+
+                byte[] d = Utils.arrayGetCenter(temp, 0, position);
+                temp = Utils.arrayDelete(temp, position + Protocol.SIGNATURE.length);
+
+                JPREMain.getInstance().getScheduler().addTask(() -> processPacket(ctx, d));
+            }
+        } catch (Exception e) {
+            e.printStackTrace();
+        }
+    }
+
+    //TODO 改为 public, 并将 ctx 改为插件可扩展的消息源以实现多源化
+    private void processPacket(ChannelHandlerContext ctx, byte[] data) {
+        if (data.length == 0) {
+            return;
+        }
+        processPacket(ctx, new BinaryStream(data));
+    }
+
+    private void processPacket(ChannelHandlerContext ctx, BinaryStream stream) {
+        //System.out.println(stream);
+        for (MPQClient client : clients) {
+            if (client.is((InetSocketAddress) ctx.channel().remoteAddress())) {
+                client.getFrame().getScheduler().addTask(() -> {
+                    try {
+                        client.dataReceive(stream);
+                    } catch (Exception e) {
+                        e.printStackTrace();
+                    }
+                });
+                return;
+            }
+        }
+    }
+
+    @Override
+    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
+        if (cause instanceof IOException) { //远程主机强迫关闭了一个现有的连接
+            return;
+        }
+
+        super.exceptionCaught(ctx, cause);
+    }
+
+    @Override
+    public void channelActive(ChannelHandlerContext ctx) throws Exception {
+        super.channelActive(ctx);
+
+        FrameConnectionEvent event = null;
+        for (MPQClient client : clients) {
+            if (client.is((InetSocketAddress) ctx.channel().remoteAddress())) {
+                event = new FrameConnectionEvent(client.getFrame());
+                client.setAddress((InetSocketAddress) ctx.channel().remoteAddress());
+                client.setCtx(ctx);
+                break;
+            }
+        }
+
+        if (event == null) {
+            Frame frame = new Frame(getJPREMain());
+            MPQClient client = new MPQClient(frame, (InetSocketAddress) ctx.channel().remoteAddress(), ctx);
+            clients.add(client);
+            event = new FrameConnectionEvent(frame);
+        }
+
+        event.getFrame().getPluginManager().callEvent(event);
+    }
+
+    @Override
+    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
+        System.out.println("[Network] RemoteClient: " + ctx.channel().remoteAddress() + " disconnected.");
+
+        for (MPQClient client : clients) {
+            if (client.is((InetSocketAddress) ctx.channel().remoteAddress())) {
+                FrameDisconnectionEvent event = new FrameDisconnectionEvent(client.getFrame());
+                client.getFrame().getPluginManager().callEvent(event);
+                break;
+            }
+        }
+
+        super.channelInactive(ctx);
+    }
+}
\ No newline at end of file

pom.xml

@@ -92,6 +92,13 @@
                 <version>2.8.5</version>
                 <scope>provided</scope>
             </dependency>
+
+            <!-- https://mvnrepository.com/artifact/io.netty/netty-all -->
+            <dependency>
+                <groupId>io.netty</groupId>
+                <artifactId>netty-all</artifactId>
+                <version>4.1.38.Final</version>
+            </dependency>
         </dependencies>
     </dependencyManagement>