Examples with StringDecoder io.netty.handler.codec.string.StringDecoder used on opensource projects

Example 46 with StringDecoder

use of io.netty.handler.codec.string.StringDecoder in project java by wavefrontHQ.

the class HistogramLineIngester method initChannel.

@Override
protected void initChannel(Channel ch) throws Exception {
    // Round robin channel to handler assignment.
    int idx = (int) (Math.abs(connectionId.getAndIncrement()) % handlers.size());
    ChannelHandler handler = handlers.get(idx);
    // Add decoders and timeout, add handler()
    ChannelPipeline pipeline = ch.pipeline();
    pipeline.addLast(new LineBasedFrameDecoder(MAXIMUM_FRAME_LENGTH, true, false), new StringDecoder(Charsets.UTF_8), new IdleStateHandler(CHANNEL_IDLE_TIMEOUT_IN_SECS_DEFAULT, 0, 0), new ChannelDuplexHandler() {

        @Override
        public void userEventTriggered(ChannelHandlerContext ctx, Object evt) throws Exception {
            if (evt instanceof IdleStateEvent) {
                if (((IdleStateEvent) evt).state() == IdleState.READER_IDLE) {
                    logger.warning("terminating connection to histogram client due to inactivity after " + CHANNEL_IDLE_TIMEOUT_IN_SECS_DEFAULT + "s: " + ctx.channel());
                    ctx.close();
                }
            }
        }
    }, handler);
}

Example 47 with StringDecoder

use of io.netty.handler.codec.string.StringDecoder in project dubbo by alibaba.

the class QosProcessHandler method decode.

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 1) {
        return;
    }
    // read one byte to guess protocol
    final int magic = in.getByte(in.readerIndex());
    ChannelPipeline p = ctx.pipeline();
    p.addLast(new LocalHostPermitHandler(acceptForeignIp));
    if (isHttp(magic)) {
        // no welcome output for http protocol
        if (welcomeFuture != null && welcomeFuture.isCancellable()) {
            welcomeFuture.cancel(false);
        }
        p.addLast(new HttpServerCodec());
        p.addLast(new HttpObjectAggregator(1048576));
        p.addLast(new HttpProcessHandler());
        p.remove(this);
    } else {
        p.addLast(new LineBasedFrameDecoder(2048));
        p.addLast(new StringDecoder(CharsetUtil.UTF_8));
        p.addLast(new StringEncoder(CharsetUtil.UTF_8));
        p.addLast(new IdleStateHandler(0, 0, 5 * 60));
        p.addLast(new TelnetIdleEventHandler());
        p.addLast(new TelnetProcessHandler());
        p.remove(this);
    }
}

Example 48 with StringDecoder

use of io.netty.handler.codec.string.StringDecoder in project tech by ffyyhh995511.

the class HelloServerInitializer method initChannel.

@Override
protected void initChannel(SocketChannel ch) throws Exception {
    ChannelPipeline pipeline = ch.pipeline();
    // 以("\n")为结尾分割的 解码器
    pipeline.addLast("framer", new DelimiterBasedFrameDecoder(8192, Delimiters.lineDelimiter()));
    // 字符串解码 和 编码
    pipeline.addLast("decoder", new StringDecoder());
    pipeline.addLast("encoder", new StringEncoder());
    // 自己的逻辑Handler
    pipeline.addLast("handler", new HelloServerHandler());
}

Example 49 with StringDecoder

use of io.netty.handler.codec.string.StringDecoder in project chuidiang-ejemplos by chuidiang.

the class ServerWithNettyHandlers method run.

public void run() throws Exception {
    // (1)
    EventLoopGroup bossGroup = new NioEventLoopGroup();
    EventLoopGroup workerGroup = new NioEventLoopGroup();
    try {
        // (2)
        ServerBootstrap b = new ServerBootstrap();
        b.group(bossGroup, workerGroup).channel(// (3)
        NioServerSocketChannel.class).childHandler(new // (4)
        ChannelInitializer<SocketChannel>() {

            @Override
            public void initChannel(SocketChannel ch) throws Exception {
                ch.pipeline().addLast(new LineBasedFrameDecoder(1000));
                ch.pipeline().addLast(new LineEncoder(Charset.defaultCharset()));
                ch.pipeline().addLast(new StringDecoder(Charset.defaultCharset()));
                ch.pipeline().addLast(serverHandler);
            }
        }).option(ChannelOption.SO_BACKLOG, // (5)
        128).childOption(ChannelOption.SO_KEEPALIVE, // (6)
        true);
        // Bind and start to accept incoming connections.
        // (7)
        ChannelFuture f = b.bind(port).sync();
        // Wait until the server socket is closed.
        // In this example, this does not happen, but you can do that to gracefully
        // shut down your server.
        f.channel().closeFuture().sync();
    } finally {
        workerGroup.shutdownGracefully();
        bossGroup.shutdownGracefully();
    }
}

Example 50 with StringDecoder

use of io.netty.handler.codec.string.StringDecoder in project openremote by openremote.

the class AbstractIOClientProtocol method getGenericStringEncodersAndDecoders.

/**
 * Supplies a set of encoders/decoders that convert from/to {@link String} to/from {@link ByteBuf} based on the generic protocol {@link Attribute}s
 */
public static Supplier<ChannelHandler[]> getGenericStringEncodersAndDecoders(AbstractNettyIOClient<String, ?> client, IOAgent<?, ?, ?> agent) {
    boolean hexMode = agent.getMessageConvertHex().orElse(false);
    boolean binaryMode = agent.getMessageConvertBinary().orElse(false);
    Charset charset = agent.getMessageCharset().map(Charset::forName).orElse(CharsetUtil.UTF_8);
    int maxLength = agent.getMessageMaxLength().orElse(Integer.MAX_VALUE);
    String[] delimiters = agent.getMessageDelimiters().orElse(new String[0]);
    boolean stripDelimiter = agent.getMessageStripDelimiter().orElse(false);
    return () -> {
        List<ChannelHandler> encodersDecoders = new ArrayList<>();
        if (hexMode || binaryMode) {
            encodersDecoders.add(new AbstractNettyIOClient.MessageToByteEncoder<>(String.class, client, (msg, out) -> {
                byte[] bytes = hexMode ? ProtocolUtil.bytesFromHexString(msg) : ProtocolUtil.bytesFromBinaryString(msg);
                out.writeBytes(bytes);
            }));
            if (delimiters.length > 0) {
                ByteBuf[] byteDelimiters = Arrays.stream(delimiters).map(delim -> Unpooled.wrappedBuffer(hexMode ? ProtocolUtil.bytesFromHexString(delim) : ProtocolUtil.bytesFromBinaryString(delim))).toArray(ByteBuf[]::new);
                encodersDecoders.add(new DelimiterBasedFrameDecoder(maxLength, stripDelimiter, byteDelimiters));
            } else {
                encodersDecoders.add(new FixedLengthFrameDecoder(maxLength));
            }
            // Incoming messages will be bytes
            encodersDecoders.add(new AbstractNettyIOClient.ByteToMessageDecoder<>(client, (byteBuf, messages) -> {
                byte[] bytes = new byte[byteBuf.readableBytes()];
                byteBuf.readBytes(bytes);
                String msg = hexMode ? ProtocolUtil.bytesToHexString(bytes) : ProtocolUtil.bytesToBinaryString(bytes);
                messages.add(msg);
            }));
        } else {
            encodersDecoders.add(new StringEncoder(charset));
            if (agent.getMessageMaxLength().isPresent()) {
                encodersDecoders.add(new FixedLengthFrameDecoder(maxLength));
            } else {
                ByteBuf[] byteDelimiters;
                if (delimiters.length > 0) {
                    byteDelimiters = Arrays.stream(delimiters).map(delim -> Unpooled.wrappedBuffer(delim.getBytes(charset))).toArray(ByteBuf[]::new);
                } else {
                    byteDelimiters = Delimiters.lineDelimiter();
                }
                encodersDecoders.add(new DelimiterBasedFrameDecoder(maxLength, stripDelimiter, byteDelimiters));
            }
            encodersDecoders.add(new StringDecoder(charset));
            encodersDecoders.add(new AbstractNettyIOClient.MessageToMessageDecoder<>(String.class, client));
        }
        return encodersDecoders.toArray(new ChannelHandler[0]);
    };
}