Java ChannelHandler类代码示例

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
protected ChannelHandler setupWSChannel(SslContext sslCtx, Configuration conf, DataStore datastore) {
    return new ChannelInitializer<SocketChannel>() {

        @Override
        protected void initChannel(SocketChannel ch) throws Exception {
            ch.pipeline().addLast("ssl", sslCtx.newHandler(ch.alloc()));
            ch.pipeline().addLast("httpServer", new HttpServerCodec());
            ch.pipeline().addLast("aggregator", new HttpObjectAggregator(8192));
            ch.pipeline().addLast("sessionExtractor", new WebSocketHttpCookieHandler(config));
            ch.pipeline().addLast("idle-handler", new IdleStateHandler(conf.getWebsocket().getTimeout(), 0, 0));
            ch.pipeline().addLast("ws-protocol", new WebSocketServerProtocolHandler(WS_PATH, null, true));
            ch.pipeline().addLast("wsDecoder", new WebSocketRequestDecoder(datastore, config));
            ch.pipeline().addLast("error", new WSExceptionHandler());
        }
    };

}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
 * Add a custom channel handler to the given channel.
 * 
 * Method modified by @Edasakii to fix bug on reload caused by CastException
 * 
 * @param player - the channel to inject.
 * @return The packet interceptor.
 */
private PacketInterceptor injectChannelInternal(Channel channel) {
    try {
        ChannelHandler ch = channel.pipeline().get(handlerName);
        PacketInterceptor interceptor = null;
        if (ch != null && ch instanceof PacketInterceptor) {
            interceptor = (PacketInterceptor) ch;
        } else {
            interceptor = new PacketInterceptor();
            channel.pipeline().addBefore("packet_handler", handlerName, interceptor);
            uninjectedChannels.remove(channel);
        }
        return interceptor;
    } catch (IllegalArgumentException e) {
        e.printStackTrace();
        return null;
    }
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
    LOGGER.info("{} : handlerAdded", connectionInfo);

    Http2Connection connection = new DefaultHttp2Connection(true);
    ChannelHandler http2ConnHandler = new HttpToHttp2ConnectionHandlerBuilder()
            .frameListener(new DelegatingDecompressorFrameListener(
                    connection,
                    new InboundHttp2ToHttpAdapterBuilder(connection)
                            .maxContentLength(master.config().getMaxContentLength())
                            .propagateSettings(true)
                            .build()))
            .connection(connection)
            .frameLogger(new Http2FrameLogger(LogLevel.DEBUG))
            .build();
    ctx.pipeline()
       .addBefore(ctx.name(), null, http2ConnHandler)
       .addBefore(ctx.name(), null, new Http2Handler());
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
@Override
public void handlerAdded(ChannelHandlerContext ctx) throws Exception {
    LOGGER.info("{} : handlerAdded", connectionInfo);

    Http2Connection connection = new DefaultHttp2Connection(false);
    ChannelHandler http2ConnHandler = new HttpToHttp2ConnectionHandlerBuilder()
            .frameListener(new DelegatingDecompressorFrameListener(
                    connection,
                    new InboundHttp2ToHttpAdapterBuilder(connection)
                            .maxContentLength(master.config().getMaxContentLength())
                            .propagateSettings(true)
                            .build()))
            .frameLogger(new Http2FrameLogger(LogLevel.DEBUG))
            .connection(connection)
            .build();
    ctx.pipeline()
       .addBefore(ctx.name(), null, http2ConnHandler)
       .addBefore(ctx.name(), null, new Http2Handler());
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
@Override
protected void initChannel(SocketChannel socketChannel) throws Exception {
    ChannelPipeline pipeline = socketChannel.pipeline();

    ChannelHandler lengthFieldBasedFrameDecoder = NettyUtils.createLengthFieldBasedFrameDecoder(32768, 0, 4);
    pipeline.addLast(lengthFieldBasedFrameDecoder);

    ChannelHandler packetDecoder = new SkyllaPacketDecoder(this.protocol);
    pipeline.addLast(packetDecoder);

    ChannelHandler lengthFieldPrepender = NettyUtils.createLengthFieldPrepender(4);
    pipeline.addLast(lengthFieldPrepender);

    ChannelHandler packetEncoder = new SkyllaPacketEncoder(this.protocol);
    pipeline.addLast(packetEncoder);

    ChannelHandler packetHandler = new SkyllaConnection(socketChannel, this.protocol);
    pipeline.addLast(packetHandler);
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
@Override
public void connect() {
    this.workerGroup = NettyUtils.createEventLoopGroup(4);

    Class<? extends Channel> channelClazz = NettyUtils.getChannel();
    ChannelHandler channelInitializer = new SkyllaChannelInitializer(this.config.getProtocol());

    Bootstrap bootstrap = new Bootstrap();

    try {
        channel = bootstrap
                .channel(channelClazz)
                .group(this.workerGroup)
                .option(ChannelOption.TCP_NODELAY, true)
                .option(ChannelOption.SO_BACKLOG, 50)
                .handler(channelInitializer)
                .connect(this.config.getServerHost(), this.config.getServerPort())
                .sync().channel();
    } catch (InterruptedException e) {
        e.printStackTrace();
    }
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
 * Adds a channel that listens locally
 */
public SocketAddress addLocalEndpoint()
{
    ChannelFuture channelfuture;

    synchronized (this.endpoints)
    {
        channelfuture = ((ServerBootstrap)((ServerBootstrap)(new ServerBootstrap()).channel(LocalServerChannel.class)).childHandler(new ChannelInitializer<Channel>()
        {
            protected void initChannel(Channel p_initChannel_1_) throws Exception
            {
                NetworkManager networkmanager = new NetworkManager(EnumPacketDirection.SERVERBOUND);
                networkmanager.setNetHandler(new NetHandlerHandshakeMemory(NetworkSystem.this.mcServer, networkmanager));
                NetworkSystem.this.networkManagers.add(networkmanager);
                p_initChannel_1_.pipeline().addLast((String)"packet_handler", (ChannelHandler)networkmanager);
            }
        }).group((EventLoopGroup)eventLoops.getValue()).localAddress(LocalAddress.ANY)).bind().syncUninterruptibly();
        this.endpoints.add(channelfuture);
    }

    return channelfuture.channel().localAddress();
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
 * Adds a channel that listens locally
 */
@SideOnly(Side.CLIENT)
public SocketAddress addLocalEndpoint()
{
    ChannelFuture channelfuture;

    synchronized (this.endpoints)
    {
        channelfuture = ((ServerBootstrap)((ServerBootstrap)(new ServerBootstrap()).channel(LocalServerChannel.class)).childHandler(new ChannelInitializer<Channel>()
        {
            protected void initChannel(Channel p_initChannel_1_) throws Exception
            {
                NetworkManager networkmanager = new NetworkManager(EnumPacketDirection.SERVERBOUND);
                networkmanager.setNetHandler(new NetHandlerHandshakeMemory(NetworkSystem.this.mcServer, networkmanager));
                NetworkSystem.this.networkManagers.add(networkmanager);
                p_initChannel_1_.pipeline().addLast((String)"packet_handler", (ChannelHandler)networkmanager);
            }
        }).group((EventLoopGroup)SERVER_NIO_EVENTLOOP.getValue()).localAddress(LocalAddress.ANY)).bind().syncUninterruptibly();
        this.endpoints.add(channelfuture);
    }

    return channelfuture.channel().localAddress();
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
	 * 适配
	 */
	@Override
	protected ChannelHandler fixHandlerBeforeConnect(final ChannelHandler handler) {
		ChannelHandler result=new ShareableChannelInboundHandler() {
			@Override
			public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
				Channel ch=ctx.channel();
				ch.pipeline().addLast(new HttpClientCodec());
            	ch.pipeline().addLast(new HttpObjectAggregator(64*1024));
            	ch.pipeline().addLast(new WebSocketClientProtocolHandler(WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, false, new DefaultHttpHeaders())));
            	ch.pipeline().addLast(new WebSocketConnectedClientHandler(handler));
				ctx.pipeline().remove(this);//移除当前handler
				ctx.pipeline().fireChannelRegistered();//重新从第一个handler抛出事件
			}
		};
//		ChannelInitializer<SocketChannel> result=new ChannelInitializer<SocketChannel>() {
//            @Override
//            protected void initChannel(SocketChannel ch) {
//            	ch.pipeline().addLast(new HttpClientCodec());
//            	ch.pipeline().addLast(new HttpObjectAggregator(64*1024));
//            	ch.pipeline().addLast(new WebSocketClientProtocolHandler(WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, false, new DefaultHttpHeaders())));
//            	ch.pipeline().addLast(new WebSocketConnectedClientHandler(handler));
//            }
//        };
        return result;
	}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
	 * 适配
	 */
	@Override
	protected ChannelHandler fixHandlerBeforeConnect(final ChannelHandler handler) {
		ChannelHandler result=new ShareableChannelInboundHandler() {
			@Override
			public void channelRegistered(ChannelHandlerContext ctx) throws Exception {
				Channel ch=ctx.channel();
				ch.pipeline().addLast(new HttpClientCodec());
            	ch.pipeline().addLast(new HttpObjectAggregator(64*1024));
            	ch.pipeline().addLast(new WebSocketClientProtocolHandler(WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, false, new DefaultHttpHeaders())));
            	ch.pipeline().addLast(new WebSocketConnectedClientHandler(handler));
				ctx.pipeline().remove(this);//移除当前handler
				ctx.fireChannelRegistered();//重新从第一个handler抛出事件
			}
		};
//		ChannelInitializer<SocketChannel> result=new ChannelInitializer<SocketChannel>() {
//            @Override
//            protected void initChannel(SocketChannel ch) {
//            	ch.pipeline().addLast(new HttpClientCodec());
//            	ch.pipeline().addLast(new HttpObjectAggregator(64*1024));
//            	ch.pipeline().addLast(new WebSocketClientProtocolHandler(WebSocketClientHandshakerFactory.newHandshaker(uri, WebSocketVersion.V13, null, false, new DefaultHttpHeaders())));
//            	ch.pipeline().addLast(new WebSocketConnectedClientHandler(handler));
//            }
//        };
        return result;
	}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
@Override
protected ChannelHandler newNonSslHandler(ChannelHandlerContext context) {
    return new ChannelInboundHandlerAdapter() {

        private HttpResponseEncoder encoder = new HttpResponseEncoder();

        @Override
        public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
            LOG.trace("Received non-SSL request, returning redirect");
            FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,
                    HttpResponseStatus.MOVED_PERMANENTLY, Unpooled.EMPTY_BUFFER);
            response.headers().set(Names.LOCATION, redirectAddress);
            LOG.trace(Constants.LOG_RETURNING_RESPONSE, response);
            encoder.write(ctx, response, ctx.voidPromise());
            ctx.flush();
        }
    };
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
private SslHandler getSslHandler() throws Exception {
  // get SslHandler if it was added to the pipeline
  ArgumentCaptor<ChannelHandler> captor = ArgumentCaptor.forClass(ChannelHandler.class);
  verify(pipeline).addFirst(captor.capture());
  SslHandler sslHandler = (SslHandler) captor.getValue();

  // mock and store the context so we can get the handshake future
  ChannelHandlerContext context = mock(ChannelHandlerContext.class);
  when(context.executor()).thenReturn(ImmediateEventExecutor.INSTANCE);
  when(context.channel()).thenReturn(mock(Channel.class, Answers.RETURNS_MOCKS.get()));

  // add the handler but prevent the handshake from running automatically
  when(channel.isActive()).thenReturn(false);
  sslHandler.handlerAdded(context);

  return sslHandler;
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
 * INTERNAL Create a new channel pair with the specified name and channel handlers.
 * This is used internally in forge and FML
 *
 * @param container The container to associate the channel with
 * @param name The name for the channel
 * @param handlers Some {@link ChannelHandler} for the channel
 * @return an {@link EnumMap} of the pair of channels. keys are {@link Side}. There will always be two entries.
 */
public EnumMap<Side,FMLEmbeddedChannel> newChannel(ModContainer container, String name, ChannelHandler... handlers)
{
    if (channels.get(Side.CLIENT).containsKey(name) || channels.get(Side.SERVER).containsKey(name) || name.startsWith("MC|") || name.startsWith("\u0001") || (name.startsWith("FML") && !("FML".equals(container.getModId()))))
    {
        throw new RuntimeException("That channel is already registered");
    }
    EnumMap<Side,FMLEmbeddedChannel> result = Maps.newEnumMap(Side.class);

    for (Side side : Side.values())
    {
        FMLEmbeddedChannel channel = new FMLEmbeddedChannel(container, name, side, handlers);
        channels.get(side).put(name,channel);
        result.put(side, channel);
    }
    return result;
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
/**
 * Adds a channel that listens locally
 */
public SocketAddress addLocalEndpoint()
{
    ChannelFuture channelfuture;

    synchronized (this.endpoints)
    {
        channelfuture = ((ServerBootstrap)((ServerBootstrap)(new ServerBootstrap()).channel(LocalServerChannel.class)).childHandler(new ChannelInitializer<Channel>()
        {
            protected void initChannel(Channel p_initChannel_1_) throws Exception
            {
                NetworkManager networkmanager = new NetworkManager(EnumPacketDirection.SERVERBOUND);
                networkmanager.setNetHandler(new NetHandlerHandshakeMemory(NetworkSystem.this.mcServer, networkmanager));
                NetworkSystem.this.networkManagers.add(networkmanager);
                p_initChannel_1_.pipeline().addLast((String)"packet_handler", (ChannelHandler)networkmanager);
            }
        }).group((EventLoopGroup)SERVER_NIO_EVENTLOOP.getValue()).localAddress(LocalAddress.ANY)).bind().syncUninterruptibly();
        this.endpoints.add(channelfuture);
    }

    return channelfuture.channel().localAddress();
}
 

import io.netty.channel.ChannelHandler; //导入依赖的package包/类
public static ChannelHandler[] getPreInterceptors(){
    preLock.lock();
    try {
        if(preInterceptors==null){
            preInterceptors = getInterceptors(PreHandleInterceptor.class);
        }
    }finally {
        preLock.unlock();
    }
    return ArrayUtil.clone(preInterceptors);
}