Example usage for io.netty.buffer Unpooled EMPTY_BUFFER

Introduction

In this page you can find the example usage for io.netty.buffer Unpooled EMPTY_BUFFER.

Prototype

ByteBuf EMPTY_BUFFER

To view the source code for io.netty.buffer Unpooled EMPTY_BUFFER.

Click Source Link

Document

A buffer whose capacity is 0 .

Usage

From source file:cc.agentx.client.net.nio.XRelayHandler.java

License:Apache License

@Override
public void channelInactive(ChannelHandlerContext ctx) {
    if (dstChannel.isActive()) {
        if (!uplink) {
            log.info("\t          Proxy <- Target \tDisconnect");
            log.info("\tClient <- Proxy           \tDisconnect");
        }//www .  j  a  v  a 2  s  . c om
        dstChannel.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
    }
}

---

From source file:cc.agentx.server.net.nio.XConnectHandler.java

License:Apache License

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) {
    try {//from  ww w.j  av a  2 s  .c o  m
        ByteBuf byteBuf = (ByteBuf) msg;
        if (!byteBuf.hasArray()) {
            byte[] bytes = new byte[byteBuf.readableBytes()];
            byteBuf.getBytes(0, bytes);

            if (!requestParsed) {
                if (!exposedRequest) {
                    bytes = wrapper.unwrap(bytes);
                    if (bytes == null) {
                        log.info("\tClient -> Proxy           \tHalf Request");
                        return;
                    }
                }
                XRequest xRequest = requestWrapper.parse(bytes);
                String host = xRequest.getHost();
                int port = xRequest.getPort();
                int dataLength = xRequest.getSubsequentDataLength();
                if (dataLength > 0) {
                    byte[] tailData = Arrays.copyOfRange(bytes, bytes.length - dataLength, bytes.length);
                    if (exposedRequest) {
                        tailData = wrapper.unwrap(tailData);
                        if (tailData != null) {
                            tailDataBuffer.write(tailData, 0, tailData.length);
                        }
                    } else {
                        tailDataBuffer.write(tailData, 0, tailData.length);
                    }
                }
                log.info("\tClient -> Proxy           \tTarget {}:{}{}", host, port,
                        DnsCache.isCached(host) ? " [Cached]" : "");
                if (xRequest.getAtyp() == XRequest.Type.DOMAIN) {
                    try {
                        host = DnsCache.get(host);
                        if (host == null) {
                            host = xRequest.getHost();
                        }
                    } catch (UnknownHostException e) {
                        log.warn("\tClient <- Proxy           \tBad DNS! ({})", e.getMessage());
                        ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
                        return;
                    }
                }

                Promise<Channel> promise = ctx.executor().newPromise();
                promise.addListener(new FutureListener<Channel>() {
                    @Override
                    public void operationComplete(final Future<Channel> future) throws Exception {
                        final Channel outboundChannel = future.getNow();
                        if (future.isSuccess()) {
                            // handle tail
                            byte[] tailData = tailDataBuffer.toByteArray();
                            tailDataBuffer.close();
                            if (tailData.length > 0) {
                                log.info("\tClient ==========> Target \tSend Tail [{} bytes]", tailData.length);
                            }
                            outboundChannel
                                    .writeAndFlush((tailData.length > 0) ? Unpooled.wrappedBuffer(tailData)
                                            : Unpooled.EMPTY_BUFFER)
                                    .addListener(channelFuture -> {
                                        // task handover
                                        outboundChannel.pipeline()
                                                .addLast(new XRelayHandler(ctx.channel(), wrapper, false));
                                        ctx.pipeline()
                                                .addLast(new XRelayHandler(outboundChannel, wrapper, true));
                                        ctx.pipeline().remove(XConnectHandler.this);
                                    });

                        } else {
                            if (ctx.channel().isActive()) {
                                ctx.writeAndFlush(Unpooled.EMPTY_BUFFER)
                                        .addListener(ChannelFutureListener.CLOSE);
                            }
                        }
                    }
                });

                final String finalHost = host;
                bootstrap.group(ctx.channel().eventLoop()).channel(NioSocketChannel.class)
                        .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000)
                        .option(ChannelOption.SO_KEEPALIVE, true)
                        .handler(new XPingHandler(promise, System.currentTimeMillis())).connect(host, port)
                        .addListener(new ChannelFutureListener() {
                            @Override
                            public void operationComplete(ChannelFuture future) throws Exception {
                                if (!future.isSuccess()) {
                                    if (ctx.channel().isActive()) {
                                        log.warn("\tClient <- Proxy           \tBad Ping! ({}:{})", finalHost,
                                                port);
                                        ctx.writeAndFlush(Unpooled.EMPTY_BUFFER)
                                                .addListener(ChannelFutureListener.CLOSE);
                                    }
                                }
                            }
                        });

                requestParsed = true;
            } else {
                bytes = wrapper.unwrap(bytes);
                if (bytes != null)
                    tailDataBuffer.write(bytes, 0, bytes.length);
            }
        }
    } finally {
        ReferenceCountUtil.release(msg);
    }
}

---

From source file:cc.agentx.server.net.nio.XConnectHandler.java

License:Apache License

@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
    if (ctx.channel().isActive()) {
        ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
    }/*from  ww  w  . j a  v  a 2s  .c om*/
    cause.printStackTrace();
    log.warn("\tBad Connection! ({})", cause.getMessage());
}

---

From source file:ch07.handlers.HttpSnoopServerHandler.java

License:Apache License

@Override
protected void channelRead0(ChannelHandlerContext ctx, Object msg) {
    if (msg instanceof HttpRequest) {
        HttpRequest request = this.request = (HttpRequest) msg;

        if (HttpHeaders.is100ContinueExpected(request)) {
            send100Continue(ctx);/*from   ww w.j  a v a2s.co m*/
        }

        buf.setLength(0);
        buf.append("WELCOME TO THE WILD WILD WEB SERVER\r\n");
        buf.append("===================================\r\n");

        buf.append("VERSION: ").append(request.protocolVersion()).append("\r\n");
        buf.append("HOSTNAME: ").append(HttpHeaders.getHost(request, "unknown")).append("\r\n");
        buf.append("REQUEST_URI: ").append(request.uri()).append("\r\n\r\n");

        HttpHeaders headers = request.headers();
        if (!headers.isEmpty()) {
            for (Map.Entry<String, String> h : headers) {
                String key = h.getKey();
                String value = h.getValue();
                buf.append("HEADER: ").append(key).append(" = ").append(value).append("\r\n");
            }
            buf.append("\r\n");
        }

        QueryStringDecoder queryStringDecoder = new QueryStringDecoder(request.uri());
        Map<String, List<String>> params = queryStringDecoder.parameters();
        if (!params.isEmpty()) {
            for (Entry<String, List<String>> p : params.entrySet()) {
                String key = p.getKey();
                List<String> vals = p.getValue();
                for (String val : vals) {
                    buf.append("PARAM: ").append(key).append(" = ").append(val).append("\r\n");
                }
            }
            buf.append("\r\n");
        }

        appendDecoderResult(buf, request);
    }

    if (msg instanceof HttpContent) {
        HttpContent httpContent = (HttpContent) msg;

        ByteBuf content = httpContent.content();
        if (content.isReadable()) {
            buf.append("CONTENT: ");
            buf.append(content.toString(CharsetUtil.UTF_8));
            buf.append("\r\n");
            appendDecoderResult(buf, request);
        }

        if (msg instanceof LastHttpContent) {
            buf.append("END OF CONTENT\r\n");

            LastHttpContent trailer = (LastHttpContent) msg;
            if (!trailer.trailingHeaders().isEmpty()) {
                buf.append("\r\n");
                for (String name : trailer.trailingHeaders().names()) {
                    for (String value : trailer.trailingHeaders().getAll(name)) {
                        buf.append("TRAILING HEADER: ");
                        buf.append(name).append(" = ").append(value).append("\r\n");
                    }
                }
                buf.append("\r\n");
            }

            if (!writeResponse(trailer, ctx)) {
                // If keep-alive is off, close the connection once the content is fully written.
                ctx.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
            }
        }
    }
}

---

From source file:cn.david.socks.SocksServerUtils.java

License:Apache License

/**
 * Closes the specified channel after all queued write requests are flushed.
 *///from  w  w  w .  jav a 2 s. c o m
public static void closeOnFlush(Channel ch) {
    if (ch.isActive()) {
        ch.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
    }
}

---

From source file:cn.ifengkou.hestia.client.MessageSendHandler.java

License:Apache License

public void close() {
    channel.writeAndFlush(Unpooled.EMPTY_BUFFER).addListener(ChannelFutureListener.CLOSE);
}

---

From source file:cn.wantedonline.puppy.httpserver.component.HttpObjectAggregator.java

License:Apache License

private static FullHttpMessage toFullMessage(HttpMessage msg) {
    if (msg instanceof FullHttpMessage) {
        return ((FullHttpMessage) msg).retain();
    }/*  w w  w .  j  av a2  s  . co  m*/

    FullHttpMessage fullMsg;
    if (msg instanceof HttpRequest) {
        fullMsg = new AggregatedFullHttpRequest((HttpRequest) msg, Unpooled.EMPTY_BUFFER,
                new DefaultHttpHeaders());
    } else if (msg instanceof HttpResponse) {
        fullMsg = new AggregatedFullHttpResponse((HttpResponse) msg, Unpooled.EMPTY_BUFFER,
                new DefaultHttpHeaders());
    } else {
        throw new IllegalStateException();
    }

    return fullMsg;
}

---

From source file:cn.wantedonline.puppy.httpserver.component.HttpRequest.java

License:Apache License

public HttpRequest(HttpVersion httpVersion, HttpMethod method, String uri) {
    super(httpVersion, method, uri, Unpooled.EMPTY_BUFFER);
}

---

From source file:cn.wantedonline.puppy.httpserver.component.HttpRequest.java

License:Apache License

public HttpRequest(HttpVersion httpVersion, HttpMethod method, String uri, boolean validateHeaders) {
    super(httpVersion, method, uri, Unpooled.EMPTY_BUFFER, validateHeaders);
}

---

From source file:code.google.nfs.rpc.netty.serialize.NettyProtocolDecoder.java

License:Apache License

/**
 * Returns the internal cumulative buffer of this decoder. You usually
 * do not need to access the internal buffer directly to write a decoder.
 * Use it only when you must use it at your own risk.
 */// w  ww . j  a  va  2 s  .  c o  m
protected ByteBuf internalBuffer() {
    if (cumulation != null) {
        return cumulation;
    } else {
        return Unpooled.EMPTY_BUFFER;
    }
}

---

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