io.netty.handler.codec.http.HttpResponseEncoder Java Examples

/**
 * Initialize the channel.
 *
 * @param channel the channel.
 */
@Override
public void initChannel(SocketChannel channel) {
    ChannelPipeline pipeline = channel.pipeline();
    if (ssl) {
        try {
            SSLContext sslContext = SSLContext.getDefault();
            SSLEngine sslEngine = sslContext.createSSLEngine();
            sslEngine.setUseClientMode(false);
            pipeline.addLast(new SslHandler(sslEngine));
        } catch (NoSuchAlgorithmException e) {
            if (LOGGER.isLoggable(SEVERE)) {
                LOGGER.log(WARNING, "Unable to match SSL algorithm", e);
            }
        }
    }
    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new HttpResponseEncoder());
    pipeline.addLast(new HttpObjectAggregator(10*1024*1024));
    pipeline.addLast(new NettyHttpServerHandler(httpServerProcessor));
}
 

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline pipeline = ch.pipeline();

    if (sslCtx != null) {
        pipeline.addLast(sslCtx.newHandler(ch.alloc()));
    }

    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new HttpResponseEncoder());

    // Remove the following line if you don't want automatic content compression.
    pipeline.addLast(new HttpContentCompressor());

    pipeline.addLast(new HttpUploadServerHandler());
}
 

@Override
protected void initChannel(SocketChannel ch) throws Exception {
	
	ChannelPipeline pipeline = ch.pipeline();
	
	if (serverTlsContext != null && serverTlsContext.useTls()) {
		SSLEngine engine = serverTlsContext.getContext().createSSLEngine();
		engine.setUseClientMode(false);
		pipeline.addLast("tls", new SslHandler(engine));
	}
	
	pipeline.addLast("encoder", new HttpResponseEncoder());
       pipeline.addLast("decoder", new HttpRequestDecoder());
       pipeline.addLast("aggregator", new HttpObjectAggregator(65536));
       pipeline.addLast("handler", new Ipcd10WebSocketServerHandler(false));
}
 

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline pipeline = ch.pipeline();

    if (sslCtx != null) {
        pipeline.addLast(sslCtx.newHandler(ch.alloc()));
    }

    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new HttpResponseEncoder());

    // Remove the following line if you don't want automatic content compression.
    pipeline.addLast(new HttpContentCompressor());

    pipeline.addLast(new HttpUploadServerHandler());
}
 

private void switchToHttp(ChannelHandlerContext ctx) {
   ChannelPipeline p = ctx.pipeline();
   p.addLast("http-decoder", new HttpRequestDecoder());
   p.addLast("http-aggregator", new HttpObjectAggregator(Integer.MAX_VALUE));
   p.addLast("http-encoder", new HttpResponseEncoder());
   //create it lazily if and when we need it
   if (httpKeepAliveRunnable == null) {
      long httpServerScanPeriod = ConfigurationHelper.getLongProperty(TransportConstants.HTTP_SERVER_SCAN_PERIOD_PROP_NAME, TransportConstants.DEFAULT_HTTP_SERVER_SCAN_PERIOD, nettyAcceptor.getConfiguration());
      httpKeepAliveRunnable = new HttpKeepAliveRunnable();
      Future<?> future = scheduledThreadPool.scheduleAtFixedRate(httpKeepAliveRunnable, httpServerScanPeriod, httpServerScanPeriod, TimeUnit.MILLISECONDS);
      httpKeepAliveRunnable.setFuture(future);
   }
   long httpResponseTime = ConfigurationHelper.getLongProperty(TransportConstants.HTTP_RESPONSE_TIME_PROP_NAME, TransportConstants.DEFAULT_HTTP_RESPONSE_TIME, nettyAcceptor.getConfiguration());
   HttpAcceptorHandler httpHandler = new HttpAcceptorHandler(httpKeepAliveRunnable, httpResponseTime, ctx.channel());
   ctx.pipeline().addLast("http-handler", httpHandler);
   p.addLast(new ProtocolDecoder(false, true));
   p.remove(this);
}
 

@Override
public void initChannel(SocketChannel socketChannel) {
  ChannelPipeline channelPipeline = socketChannel.pipeline();
  channelPipeline.addLast("decoder", new HttpRequestDecoder());
  channelPipeline.addLast("encoder", new HttpResponseEncoder());
  channelPipeline.addLast("idle", new IdleStateHandler(0, 0, _proxyServer.getClientConnectionIdleTimeout()));
  ChannelMediator channelMediator = new ChannelMediator(socketChannel,
      _proxyServer.getProxyModeControllerFactory(),
      _proxyServer.getDownstreamWorkerGroup(),
      _proxyServer.getServerConnectionIdleTimeout(),
      _proxyServer.getAllChannels());
  ClientChannelHandler clientChannelHandler =
      new ClientChannelHandler(channelMediator, _proxyServer.getConnectionFlowRegistry());

  channelPipeline.addLast("handler", clientChannelHandler);
}
 

@Override
public void initChannel(SocketChannel ch) {
	ChannelPipeline pipeline = ch.pipeline();
	if (sslCtx != null) {
		pipeline.addLast(sslCtx.newHandler(ch.alloc()));
	}
	pipeline.addLast(new HttpResponseEncoder());
	pipeline.addLast(new HttpRequestDecoder());
	// Uncomment the following line if you don't want to handle HttpChunks.
	//pipeline.addLast("chunkedWriter", new ChunkedWriteHandler());
	//p.addLast(new HttpObjectAggregator(1048576));
	// Remove the following line if you don't want automatic content compression.
	//pipeline.addLast(new HttpContentCompressor());
	
	// Uncomment the following line if you don't want to handle HttpContents.
	pipeline.addLast(new HttpObjectAggregator(65536));
	pipeline.addLast("readTimeoutHandler", new ReadTimeoutHandler(READ_TIMEOUT));
	pipeline.addLast("myHandler", new MyHandler());
	
	pipeline.addLast("handler", new HttpServerHandler(listener));
}
 

@Test
public void prematureCancel() {
	FluxIdentityProcessor<Void> signal = Processors.more().multicastNoBackpressure();
	disposableServer =
			TcpServer.create()
			         .host("localhost")
			         .port(0)
			         .handle((in, out) -> {
			             signal.onComplete();
			             return out.withConnection(c -> c.addHandlerFirst(new HttpResponseEncoder()))
			                       .sendObject(Mono.delay(Duration.ofSeconds(2))
			                                       .map(t -> new DefaultFullHttpResponse(HttpVersion.HTTP_1_1,
			                                                                             HttpResponseStatus.PROCESSING)))
			                       .neverComplete();
			         })
			         .wiretap(true)
			         .bindNow(Duration.ofSeconds(30));

	StepVerifier.create(
			createHttpClientForContextWithAddress()
			        .get()
			        .uri("/")
			        .responseContent()
			        .timeout(signal))
			    .verifyError(TimeoutException.class);
}
 

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline p = ch.pipeline();
    if (sslCtx != null) {
        p.addLast(sslCtx.newHandler(ch.alloc()));
    }

    p.addLast(new HttpRequestDecoder());
    // Uncomment the following line if you don't want to handle HttpChunks.
    p.addLast(new HttpObjectAggregator(65536));
    p.addLast(new HttpResponseEncoder());
    // Remove the following line if you don't want automatic content
    // compression.
    p.addLast(new HttpContentCompressor());
    p.addLast(new ApiRequestParser());
}
 

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
	if (msg instanceof ByteBuf && ctx.channel().isActive()) {
		boolean isHttpRequest = false;
		ByteBuf buffer = (ByteBuf) msg;
		final int len = 11;
		if (buffer.readableBytes() > len) {
			byte[] dst = new byte[len];
			buffer.getBytes(buffer.readerIndex(), dst, 0, len);
			int n = HttpMethodUtil.method(dst);
			isHttpRequest = n > 2;
		}
		if (isHttpRequest) {
			ChannelPipeline cp = ctx.pipeline();
			String currentName = ctx.name();
			cp.addAfter(currentName, "HttpRequestDecoder", new HttpRequestDecoder());
			cp.addAfter("HttpRequestDecoder", "HttpResponseEncoder", new HttpResponseEncoder());
			cp.addAfter("HttpResponseEncoder", "HttpObjectAggregator", new HttpObjectAggregator(512 * 1024));
			ChannelHandler handler = serverDef.httpHandlerFactory.create(serverDef);
			cp.addAfter("HttpObjectAggregator", "HttpThriftBufDecoder", handler);

			cp.remove(currentName);
		}
	}
	ctx.fireChannelRead(msg);
}
 

@Override
protected void initChannel(SocketChannel ch) throws Exception {
    /*
     * ChannelInboundHandler按照注册的先后顺序执行，ChannelOutboundHandler按照注册的先后顺序逆序执行。
     * HttpRequestDecoder、HttpObjectAggregator、HttpHandler为InboundHandler
     * HttpContentCompressor、HttpResponseEncoder为OutboundHandler
     * 在使用Handler的过程中，需要注意：
     * 1、ChannelInboundHandler之间的传递，通过调用 ctx.fireChannelRead(msg) 实现；调用ctx.write(msg) 将传递到ChannelOutboundHandler。
     * 2、ctx.write()方法执行后，需要调用flush()方法才能令它立即执行。
     * 3、ChannelOutboundHandler 在注册的时候需要放在最后一个ChannelInboundHandler之前，否则将无法传递到ChannelOutboundHandler。
     * 4、Handler的消费处理放在最后一个处理。
     */
    ChannelPipeline pipeline = ch.pipeline();
    pipeline.addLast("decoder", new HttpRequestDecoder());
    pipeline.addLast("aggregator", new HttpObjectAggregator(maxContentLength));
    pipeline.addLast("encoder", new HttpResponseEncoder());
    // 启用gzip（由于使用本地存储文件，不能启用gzip）
    //pipeline.addLast(new HttpContentCompressor(1));
    pipeline.addLast(new ChunkedWriteHandler());
    // 将HttpRequestHandler放在业务线程池中执行，避免阻塞worker线程。
    pipeline.addLast(eventExecutorGroup, "httpRequestHandler", new HttpRequestHandler());
}
 

@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(HttpHeaderNames.LOCATION, redirectAddress);
            LOG.trace(Constants.LOG_RETURNING_RESPONSE, response);
            encoder.write(ctx, response, ctx.voidPromise());
            ctx.flush();
        }
    };
}
 

private ServerBootstrap serverBootstrap() {
        boot.group(bossGroup, workGroup)
                .channel(NioServerSocketChannel.class)
                .childHandler(new ChannelInitializer<SocketChannel>() {
                                  @Override
                                  protected void initChannel(SocketChannel ch) throws Exception {
                                      ch.pipeline()
                                              .addLast("decoder", new HttpRequestDecoder())
                                              .addLast("http-aggregator", new HttpObjectAggregator(65536))
//                                              .addLast("encoder", new HttpResponseDecoder())
                                              .addLast("base-encoder", new HttpResponseEncoder())
                                              .addLast("chunk", new ChunkedWriteHandler())
                                              .addLast("handler", new TestHttpServerHandler());

                                  }
                              }
                );


        return boot;
    }
 

@Override
public void init() {
    super.init();
    b.group(bossGroup, workGroup)
            .channel(NioServerSocketChannel.class)
            .option(ChannelOption.SO_KEEPALIVE, false)
            .option(ChannelOption.TCP_NODELAY, true)
            .option(ChannelOption.SO_BACKLOG, 1024)
            .localAddress(new InetSocketAddress(port))
            .childHandler(new ChannelInitializer<SocketChannel>() {

                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ch.pipeline().addLast(defLoopGroup,
                            new HttpRequestDecoder(),       //请求解码器
                            new HttpObjectAggregator(65536),//将多个消息转换成单一的消息对象
                            new HttpResponseEncoder(),      // 响应编码器
                            new HttpServerHandler(snowFlake)//自定义处理器
                    );
                }
            });

}
 

@Override
	protected void initChannel(SocketChannel ch) throws Exception {
		ChannelPipeline p = ch.pipeline();
		if(sslCtx!=null)
		{
			p.addLast(new SslHandler(sslCtx.newEngine(ch.alloc())));
		}
		p.addLast(new HttpResponseEncoder());//必须放在最前面,如果decoder途中需要回复消息,则decoder前面需要encoder
		p.addLast(new HttpRequestDecoder());
		p.addLast(new HttpObjectAggregator(65536));//限制contentLength
		//大文件传输处理
//		p.addLast(new ChunkedWriteHandler());
//		p.addLast(new HttpContentCompressor());
		//跨域配置
		CorsConfig corsConfig = CorsConfigBuilder.forAnyOrigin().allowNullOrigin().allowCredentials().build();
		p.addLast(new CorsHandler(corsConfig));
		if(unPoolMsg)
		{
			p.addLast(new DefaultListenerHandler<HttpRequest>(new HttpListenerProxy(listener)));
		}else
		{
			p.addLast(new DefaultListenerHandler<HttpRequest>(listener));
		}
	}
 

@Override
protected void initChannel(SocketChannel ch) throws Exception {
    ChannelPipeline pipeline = ch.pipeline();

    config.getChannelInboundHandlerList().forEach(pipeline::addLast);
    config.getChannelOutboundHandlerList().forEach(pipeline::addLast);
    pipeline.addLast(new HttpResponseEncoder());
    config.getHttpResponseHandlerList().forEach(pipeline::addLast);
    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new ChunkedWriteHandler());
    pipeline.addLast(new HttpObjectAggregator(10 * 1024 * 1024));
    pipeline.addLast(new FrontHandler());
    pipeline.addLast(new ExceptionHandler());


    ch.closeFuture().addListener(new ChannelFutureListener() {
        @Override
        public void operationComplete(ChannelFuture future) throws Exception {
            logger.debug("channel close");
        }
    });
}
 

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline pipeline = ch.pipeline();

    if (sslCtx != null) {
        pipeline.addLast(sslCtx.newHandler(ch.alloc()));
    }

    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new HttpResponseEncoder());

    // Remove the following line if you don't want automatic content compression.
    pipeline.addLast(new HttpContentCompressor());

    pipeline.addLast(new HttpUploadServerHandler());
}
 

@Override
protected void initChannel(SocketChannel ch)
        throws Exception {
    // Create a default pipeline implementation.
    CorsConfig corsConfig = CorsConfig.withAnyOrigin().build();
    ChannelPipeline pipeline = ch.pipeline();
    // Uncomment the following line if you want HTTPS
    //SSLEngine engine = SecureChatSslContextFactory.getServerContext().createSSLEngine();
    //engine.setUseClientMode(false);
    //pipeline.addLast("ssl", new SslHandler(engine));

    pipeline.addLast("encoder", new HttpResponseEncoder());
    pipeline.addLast("decoder", new HttpRequestDecoder());
    pipeline.addLast("aggregator", new HttpObjectAggregator(8388608)); // 8MB
    //pipeline.addLast("chunkedWriter", new ChunkedWriteHandler());
    pipeline.addLast("cors", new CorsHandler(corsConfig));
    pipeline.addLast("handler", new HttpStaticFileServerHandler());
}
 

@Override
public ChannelHandler[] channelHandler(Connector connector, AppContext appContext) {
    RsfContext rsfContext = appContext.getInstance(RsfContext.class);
    RsfDuplexHandler inHandler = new RsfDuplexHandler(  //
            new HttpRequestDecoder(),   //
            new HttpResponseEncoder()   //
    );
    return new ChannelHandler[] {       //
            inHandler,                  //
            new HttpCoder(rsfContext, connector, this.httpHandler)//
    };
}
 

public ChannelFuture bind(SocketAddress address, final Callable<Processor<HttpRequest, HttpResponse>> handler) {
    ServerBootstrap bootstrap = new ServerBootstrap();
    bootstrap.group(eventLoop)
            .channel(NioServerSocketChannel.class)
            .childOption(ChannelOption.AUTO_READ, false)
            .localAddress(address)
            .childHandler(new ChannelInitializer<SocketChannel>() {
                @Override
                protected void initChannel(SocketChannel ch) throws Exception {
                    ChannelPipeline pipeline = ch.pipeline();

                    pipeline.addLast(
                            new HttpRequestDecoder(),
                            new HttpResponseEncoder()
                    ).addLast("serverStreamsHandler", new HttpStreamsServerHandler());

                    HandlerSubscriber<HttpResponse> subscriber = new HandlerSubscriber<>(ch.eventLoop(), 2, 4);
                    HandlerPublisher<HttpRequest> publisher = new HandlerPublisher<>(ch.eventLoop(), HttpRequest.class);

                    pipeline.addLast("serverSubscriber", subscriber);
                    pipeline.addLast("serverPublisher", publisher);

                    Processor<HttpRequest, HttpResponse> processor = handler.call();
                    processor.subscribe(subscriber);
                    publisher.subscribe(processor);
                }
            });

    return bootstrap.bind();
}
 

private void switchToHttp(ChannelHandlerContext ctx) {
    ChannelPipeline p = ctx.pipeline();
    p.addLast("decoder", new HttpRequestDecoder());
    p.addLast("encoder", new HttpResponseEncoder());
    p.addLast("deflater", new HttpContentCompressor());
    p.addLast("handler", new HttpSnoopServerHandler());
    p.remove(this);
}
 

protected ChannelHandler setupHttpChannel(Configuration config, SslContext sslCtx) {

        return new ChannelInitializer<SocketChannel>() {

            @Override
            protected void initChannel(SocketChannel ch) throws Exception {

                ch.pipeline().addLast("ssl", new NonSslRedirectHandler(config, sslCtx));
                ch.pipeline().addLast("encoder", new HttpResponseEncoder());
                ch.pipeline().addLast("decoder", new HttpRequestDecoder());
                ch.pipeline().addLast("compressor", new HttpContentCompressor());
                ch.pipeline().addLast("decompressor", new HttpContentDecompressor());
                ch.pipeline().addLast("aggregator", new HttpObjectAggregator(8192));
                ch.pipeline().addLast("chunker", new ChunkedWriteHandler());
                final Configuration.Cors corsCfg = config.getHttp().getCors();
                final CorsConfigBuilder ccb;
                if (corsCfg.isAllowAnyOrigin()) {
                    ccb = CorsConfigBuilder.forAnyOrigin();
                } else {
                    ccb = CorsConfigBuilder.forOrigins(corsCfg.getAllowedOrigins().stream().toArray(String[]::new));
                }
                if (corsCfg.isAllowNullOrigin()) {
                    ccb.allowNullOrigin();
                }
                if (corsCfg.isAllowCredentials()) {
                    ccb.allowCredentials();
                }
                corsCfg.getAllowedMethods().stream().map(HttpMethod::valueOf).forEach(ccb::allowedRequestMethods);
                corsCfg.getAllowedHeaders().forEach(ccb::allowedRequestHeaders);
                CorsConfig cors = ccb.build();
                LOG.trace("Cors configuration: {}", cors);
                ch.pipeline().addLast("cors", new CorsHandler(cors));
                ch.pipeline().addLast("queryDecoder", new qonduit.netty.http.HttpRequestDecoder(config));
                ch.pipeline().addLast("strict", new StrictTransportHandler(config));
                ch.pipeline().addLast("login", new X509LoginRequestHandler(config));
                ch.pipeline().addLast("doLogin", new BasicAuthLoginRequestHandler(config));
                ch.pipeline().addLast("error", new HttpExceptionHandler());
            }
        };
    }
 

@Override
public void channelRead0
  (final ChannelHandlerContext ctx, final HttpRequest req) {
  uri = req.getUri();
  final Channel client = ctx.channel();
  Bootstrap proxiedServer = new Bootstrap()
    .group(client.eventLoop())
    .channel(NioSocketChannel.class)
    .handler(new ChannelInitializer<SocketChannel>() {
      @Override
      protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline p = ch.pipeline();
        p.addLast(new HttpRequestEncoder(), new Forwarder(uri, client));
      }
    });
  ChannelFuture f = proxiedServer.connect(host);
  proxiedChannel = f.channel();
  f.addListener(new ChannelFutureListener() {
    @Override
    public void operationComplete(ChannelFuture future) throws Exception {
      if (future.isSuccess()) {
        ctx.channel().pipeline().remove(HttpResponseEncoder.class);
        HttpRequest newReq = new DefaultFullHttpRequest(HTTP_1_1,
          req.getMethod(), req.getUri());
        newReq.headers().add(req.headers());
        newReq.headers().set(CONNECTION, Values.CLOSE);
        future.channel().writeAndFlush(newReq);
      } else {
        DefaultHttpResponse resp = new DefaultHttpResponse(HTTP_1_1,
          INTERNAL_SERVER_ERROR);
        resp.headers().set(CONNECTION, Values.CLOSE);
        LOG.info("Proxy " + uri + " failed. Cause: ", future.cause());
        ctx.writeAndFlush(resp).addListener(ChannelFutureListener.CLOSE);
        client.close();
      }
    }
  });
}
 

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline p = ch.pipeline();
    if (sslCtx != null) {
        p.addLast(sslCtx.newHandler(ch.alloc()));
    }
    p.addLast(new HttpRequestDecoder());
    // Uncomment the following line if you don't want to handle HttpChunks.
    //p.addLast(new HttpObjectAggregator(1048576));
    p.addLast(new HttpResponseEncoder());
    // Remove the following line if you don't want automatic content compression.
    //p.addLast(new HttpContentCompressor());
    p.addLast(new HttpSnoopServerHandler());
}
 

@Override
public void initChannel(SocketChannel ch) {
    CorsConfig corsConfig = CorsConfigBuilder.forAnyOrigin().allowNullOrigin().allowCredentials().build();
    ChannelPipeline pipeline = ch.pipeline();
    if (sslCtx != null) {
        pipeline.addLast(sslCtx.newHandler(ch.alloc()));
    }
    pipeline.addLast(new HttpResponseEncoder());
    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new HttpObjectAggregator(65536));
    pipeline.addLast(new ChunkedWriteHandler());
    pipeline.addLast(new CorsHandler(corsConfig));
    pipeline.addLast(new OkResponseHandler());
}
 

@Override
public void initChannel(SocketChannel ch) {
    ChannelPipeline p = ch.pipeline();
    if (sslCtx != null) {
        p.addLast(sslCtx.newHandler(ch.alloc()));
    }
    p.addLast(new HttpRequestDecoder());
    // Uncomment the following line if you don't want to handle HttpChunks.
    //p.addLast(new HttpObjectAggregator(1048576));
    p.addLast(new HttpResponseEncoder());
    // Remove the following line if you don't want automatic content compression.
    //p.addLast(new HttpContentCompressor());
    p.addLast(new HttpSnoopServerHandler());
}
 

@Override
public void initChannel(SocketChannel ch) {
    CorsConfig corsConfig = CorsConfig.withAnyOrigin().build();
    ChannelPipeline pipeline = ch.pipeline();
    if (sslCtx != null) {
        pipeline.addLast(sslCtx.newHandler(ch.alloc()));
    }
    pipeline.addLast(new HttpResponseEncoder());
    pipeline.addLast(new HttpRequestDecoder());
    pipeline.addLast(new HttpObjectAggregator(65536));
    pipeline.addLast(new ChunkedWriteHandler());
    pipeline.addLast(new CorsHandler(corsConfig));
    pipeline.addLast(new OkResponseHandler());
}
 

/**
 * Add all {@link ChannelHandler}'s that are needed for HTTP.
 */
protected void addHttpHandlers(ChannelHandlerContext ctx) {
    ChannelPipeline pipeline = ctx.pipeline();
    pipeline.addLast("httpRequestDecoder", new HttpRequestDecoder());
    pipeline.addLast("httpResponseEncoder", new HttpResponseEncoder());
    pipeline.addLast("httpChunkAggregator", new HttpObjectAggregator(maxHttpContentLength));
    pipeline.addLast("httpRequestHandler", createHttpRequestHandlerForHttp());
}
 

@Override
public void initChannel(SocketChannel ch) throws Exception {
    ChannelPipeline pipeline = ch.pipeline();
    pipeline.addLast("encoder", new HttpResponseEncoder());
    pipeline.addLast("decoder", new HttpRequestDecoder());
    pipeline.addLast("handler", new AutobahnServerHandler());
}
 

@Override
public void channelRead0
  (final ChannelHandlerContext ctx, final HttpRequest req) {
  uri = req.getUri();
  final Channel client = ctx.channel();
  Bootstrap proxiedServer = new Bootstrap()
    .group(client.eventLoop())
    .channel(NioSocketChannel.class)
    .handler(new ChannelInitializer<SocketChannel>() {
      @Override
      protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline p = ch.pipeline();
        p.addLast(new HttpRequestEncoder(), new Forwarder(uri, client));
      }
    });
  ChannelFuture f = proxiedServer.connect(host);
  proxiedChannel = f.channel();
  f.addListener(new ChannelFutureListener() {
    @Override
    public void operationComplete(ChannelFuture future) throws Exception {
      if (future.isSuccess()) {
        ctx.channel().pipeline().remove(HttpResponseEncoder.class);
        HttpRequest newReq = new DefaultFullHttpRequest(HTTP_1_1,
          req.getMethod(), req.getUri());
        newReq.headers().add(req.headers());
        newReq.headers().set(CONNECTION, Values.CLOSE);
        future.channel().writeAndFlush(newReq);
      } else {
        DefaultHttpResponse resp = new DefaultHttpResponse(HTTP_1_1,
          INTERNAL_SERVER_ERROR);
        resp.headers().set(CONNECTION, Values.CLOSE);
        LOG.info("Proxy " + uri + " failed. Cause: ", future.cause());
        ctx.writeAndFlush(resp).addListener(ChannelFutureListener.CLOSE);
        client.close();
      }
    }
  });
}