Example usage for io.netty.channel ChannelFuture addListener

List of usage examples for io.netty.channel ChannelFuture addListener

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Introduction

In this page you can find the example usage for io.netty.channel ChannelFuture addListener.

Prototype

@Override
    ChannelFuture addListener(GenericFutureListener<? extends Future<? super Void>> listener);

Source Link

Usage

From source file:com.elephant.framework.network.telnet.netty.TelnetServerHandler.java

License:Apache License

@Override
public void messageReceived(ChannelHandlerContext ctx, String request) throws Exception {

    //String msgId = request.substring(0, endIndex)

    // Generate and write a response.
    String response;//from  w  w  w .  j  a  v a 2  s . c o  m
    boolean close = false;
    if (request.isEmpty()) {
        response = "Please type something.\r\n";
    } else if ("bye".equals(request.toLowerCase())) {
        response = "Have a good day!\r\n";
        close = true;
    } else {
        response = "Did you say '" + request + "'?\r\n";
    }

    // We do not need to write a ChannelBuffer here.
    // We know the encoder inserted at TelnetPipelineFactory will do the conversion.
    ChannelFuture future = ctx.write(response);

    // Close the connection after sending 'Have a good day!'
    // if the client has sent 'bye'.
    if (close) {
        future.addListener(ChannelFutureListener.CLOSE);
    }
}

From source file:com.emin.igwmp.skm.core.netty.handler.SocksServerConnectHandler.java

License:Apache License

@Override
public void channelRead0(final ChannelHandlerContext ctx, final SocksMessage message) throws Exception {
    if (message instanceof Socks4CommandRequest) {
        final Socks4CommandRequest request = (Socks4CommandRequest) message;
        Promise<Channel> promise = ctx.executor().newPromise();
        promise.addListener(new FutureListener<Channel>() {
            @Override// ww w. j a v  a 2 s  .  c o m
            public void operationComplete(final Future<Channel> future) throws Exception {
                final Channel outboundChannel = future.getNow();
                if (future.isSuccess()) {
                    ChannelFuture responseFuture = ctx.channel()
                            .writeAndFlush(new DefaultSocks4CommandResponse(Socks4CommandStatus.SUCCESS));

                    responseFuture.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture channelFuture) {
                            ctx.pipeline().remove(SocksServerConnectHandler.this);
                            outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                            ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                        }
                    });
                } else {
                    ctx.channel().writeAndFlush(
                            new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop()).channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000).option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.dstAddr(), request.dstPort()).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(
                            new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    } else if (message instanceof Socks5CommandRequest) {
        final Socks5CommandRequest request = (Socks5CommandRequest) message;
        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()) {
                    ChannelFuture responseFuture = ctx.channel()
                            .writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.SUCCESS,
                                    request.dstAddrType(), request.dstAddr(), request.dstPort()));

                    responseFuture.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture channelFuture) {
                            ctx.pipeline().remove(SocksServerConnectHandler.this);
                            outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                            ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                        }
                    });
                } else {
                    ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.FAILURE,
                            request.dstAddrType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop()).channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000).option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.dstAddr(), request.dstPort()).addListener(new ChannelFutureListener() {
            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.FAILURE,
                            request.dstAddrType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    } else {
        ctx.close();
    }
}

From source file:com.example.pojo.server.ServerTimeServerHandler.java

License:Apache License

@Override
public void channelActive(final ChannelHandlerContext ctx) {
    final ServerTime serverTime = new ServerTime(offset);
    log.info("channel active: {}", serverTime);
    final ChannelFuture channelFuture = ctx.writeAndFlush(serverTime);
    channelFuture.addListener((ChannelFuture future) -> {
        log.info("close channel.");
        future.channel().closeFuture();/*from  ww w . j  av a2  s .co  m*/
    });
}

From source file:com.fanavard.challenge.server.websocket.server.WebSocketServerHandler.java

License:Apache License

private static void sendHttpResponse(ChannelHandlerContext ctx, FullHttpRequest req, FullHttpResponse res) {
    // Generate an error page if response getStatus code is not OK (200).
    if (res.status().code() != 200) {
        ByteBuf buf = Unpooled.copiedBuffer(res.status().toString(), CharsetUtil.UTF_8);
        res.content().writeBytes(buf);/*from  w ww.  j  a v  a 2  s  .  c  o  m*/
        buf.release();
        HttpHeaderUtil.setContentLength(res, res.content().readableBytes());
    }

    // Send the response and close the connection if necessary.
    ChannelFuture f = ctx.channel().writeAndFlush(res);
    if (!HttpHeaderUtil.isKeepAlive(req) || res.status().code() != 200) {
        f.addListener(ChannelFutureListener.CLOSE);
    }
}

From source file:com.fjn.helper.frameworkex.netty.v4.discardserver.DiscardServerHandler.java

License:Apache License

/**
 * ???//  w  ww .j  a  v  a 2 s.  co  m
 * @param ctx
 * @param msg
 * @throws Exception
 */
public void channelRead(final ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf in = (ByteBuf) msg;
    try {
        while (in.isReadable()) {
            char c = (char) in.readByte();
            content += c;
            if (c == '\n' || c == '\r') {
                if (!line.isEmpty()) {
                    System.out.println(line);
                }
                if ("quit".equals(line)) {
                    ByteBuf bf = ctx.alloc().buffer(content.getBytes().length);
                    bf.setBytes(0, content.getBytes());
                    final ChannelFuture f = ctx.writeAndFlush(bf); // (3)
                    f.addListener(new ChannelFutureListener() {
                        @Override
                        public void operationComplete(ChannelFuture future) throws InterruptedException {
                            assert f == future;
                            ctx.close();
                        }
                    }); // (4)
                }
                line = "";
                continue;
            } else {
                line += c;
            }
        }
    } finally {
        ReferenceCountUtil.release(msg);
    }
}

From source file:com.fjn.helper.frameworkex.netty.v4.timetest.TimeServerHandler.java

License:Apache License

@Override
public void channelActive(ChannelHandlerContext ctx) {
    ChannelFuture f = ctx.writeAndFlush(new UnixTime());
    f.addListener(ChannelFutureListener.CLOSE);
}

From source file:com.flysoloing.learning.network.netty.http.file.HttpStaticFileServerHandler.java

License:Apache License

@Override
public void channelRead0(ChannelHandlerContext ctx, FullHttpRequest request) throws Exception {
    if (!request.decoderResult().isSuccess()) {
        sendError(ctx, BAD_REQUEST);//from   ww  w  . jav a  2 s  .c o m
        return;
    }

    if (request.method() != GET) {
        sendError(ctx, METHOD_NOT_ALLOWED);
        return;
    }

    final String uri = request.uri();
    final String path = sanitizeUri(uri);
    if (path == null) {
        sendError(ctx, FORBIDDEN);
        return;
    }

    File file = new File(path);
    if (file.isHidden() || !file.exists()) {
        sendError(ctx, NOT_FOUND);
        return;
    }

    if (file.isDirectory()) {
        if (uri.endsWith("/")) {
            sendListing(ctx, file, uri);
        } else {
            sendRedirect(ctx, uri + '/');
        }
        return;
    }

    if (!file.isFile()) {
        sendError(ctx, FORBIDDEN);
        return;
    }

    // Cache Validation
    String ifModifiedSince = request.headers().get(HttpHeaderNames.IF_MODIFIED_SINCE);
    if (ifModifiedSince != null && !ifModifiedSince.isEmpty()) {
        SimpleDateFormat dateFormatter = new SimpleDateFormat(HTTP_DATE_FORMAT, Locale.US);
        Date ifModifiedSinceDate = dateFormatter.parse(ifModifiedSince);

        // Only compare up to the second because the datetime format we send to the client
        // does not have milliseconds
        long ifModifiedSinceDateSeconds = ifModifiedSinceDate.getTime() / 1000;
        long fileLastModifiedSeconds = file.lastModified() / 1000;
        if (ifModifiedSinceDateSeconds == fileLastModifiedSeconds) {
            sendNotModified(ctx);
            return;
        }
    }

    RandomAccessFile raf;
    try {
        raf = new RandomAccessFile(file, "r");
    } catch (FileNotFoundException ignore) {
        sendError(ctx, NOT_FOUND);
        return;
    }
    long fileLength = raf.length();

    HttpResponse response = new DefaultHttpResponse(HTTP_1_1, OK);
    HttpUtil.setContentLength(response, fileLength);
    setContentTypeHeader(response, file);
    setDateAndCacheHeaders(response, file);
    if (HttpUtil.isKeepAlive(request)) {
        response.headers().set(HttpHeaderNames.CONNECTION, HttpHeaderValues.KEEP_ALIVE);
    }

    // Write the initial line and the header.
    ctx.write(response);

    // Write the content.
    ChannelFuture sendFileFuture;
    ChannelFuture lastContentFuture;
    if (ctx.pipeline().get(SslHandler.class) == null) {
        sendFileFuture = ctx.write(new DefaultFileRegion(raf.getChannel(), 0, fileLength),
                ctx.newProgressivePromise());
        // Write the end marker.
        lastContentFuture = ctx.writeAndFlush(LastHttpContent.EMPTY_LAST_CONTENT);
    } else {
        sendFileFuture = ctx.writeAndFlush(new HttpChunkedInput(new ChunkedFile(raf, 0, fileLength, 8192)),
                ctx.newProgressivePromise());
        // HttpChunkedInput will write the end marker (LastHttpContent) for us.
        lastContentFuture = sendFileFuture;
    }

    sendFileFuture.addListener(new ChannelProgressiveFutureListener() {
        public void operationProgressed(ChannelProgressiveFuture future, long progress, long total) {
            if (total < 0) { // total unknown
                System.err.println(future.channel() + " Transfer progress: " + progress);
            } else {
                System.err.println(future.channel() + " Transfer progress: " + progress + " / " + total);
            }
        }

        public void operationComplete(ChannelProgressiveFuture future) {
            System.err.println(future.channel() + " Transfer complete.");
        }
    });

    // Decide whether to close the connection or not.
    if (!HttpUtil.isKeepAlive(request)) {
        // Close the connection when the whole content is written out.
        lastContentFuture.addListener(ChannelFutureListener.CLOSE);
    }
}

From source file:com.flysoloing.learning.network.netty.proxy.HexDumpProxyFrontendHandler.java

License:Apache License

@Override
public void channelActive(ChannelHandlerContext ctx) {
    final Channel inboundChannel = ctx.channel();

    // Start the connection attempt.
    Bootstrap b = new Bootstrap();
    b.group(inboundChannel.eventLoop()).channel(ctx.channel().getClass())
            .handler(new HexDumpProxyBackendHandler(inboundChannel)).option(ChannelOption.AUTO_READ, false);
    ChannelFuture f = b.connect(remoteHost, remotePort);
    outboundChannel = f.channel();/*from  w w w. j  a v  a 2  s.c o m*/
    f.addListener(new ChannelFutureListener() {
        public void operationComplete(ChannelFuture future) {
            if (future.isSuccess()) {
                // connection complete start to read first data
                inboundChannel.read();
            } else {
                // Close the connection if the connection attempt has failed.
                inboundChannel.close();
            }
        }
    });
}

From source file:com.flysoloing.learning.network.netty.redis.RedisClient.java

License:Apache License

public static void main(String[] args) throws Exception {
    EventLoopGroup group = new NioEventLoopGroup();
    try {/* w  w w  .  j ava  2s.co  m*/
        Bootstrap b = new Bootstrap();
        b.group(group).channel(NioSocketChannel.class).handler(new ChannelInitializer<SocketChannel>() {
            @Override
            protected void initChannel(SocketChannel ch) throws Exception {
                ChannelPipeline p = ch.pipeline();
                p.addLast(new RedisDecoder());
                p.addLast(new RedisBulkStringAggregator());
                p.addLast(new RedisArrayAggregator());
                p.addLast(new RedisEncoder());
                p.addLast(new RedisClientHandler());
            }
        });

        // Start the connection attempt.
        Channel ch = b.connect(HOST, PORT).sync().channel();

        // Read commands from the stdin.
        System.out.println("Enter Redis commands (quit to end)");
        ChannelFuture lastWriteFuture = null;
        BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
        for (;;) {
            final String input = in.readLine();
            final String line = input != null ? input.trim() : null;
            if (line == null || "quit".equalsIgnoreCase(line)) { // EOF or "quit"
                ch.close().sync();
                break;
            } else if (line.isEmpty()) { // skip `enter` or `enter` with spaces.
                continue;
            }
            // Sends the received line to the server.
            lastWriteFuture = ch.writeAndFlush(line);
            lastWriteFuture.addListener(new GenericFutureListener<ChannelFuture>() {
                @Override
                public void operationComplete(ChannelFuture future) throws Exception {
                    if (!future.isSuccess()) {
                        System.err.print("write failed: ");
                        future.cause().printStackTrace(System.err);
                    }
                }
            });
        }

        // Wait until all messages are flushed before closing the channel.
        if (lastWriteFuture != null) {
            lastWriteFuture.sync();
        }
    } finally {
        group.shutdownGracefully();
    }
}

From source file:com.flysoloing.learning.network.netty.socksproxy.SocksServerConnectHandler.java

License:Apache License

@Override
public void channelRead0(final ChannelHandlerContext ctx, final SocksMessage message) throws Exception {
    if (message instanceof Socks4CommandRequest) {
        final Socks4CommandRequest request = (Socks4CommandRequest) message;
        Promise<Channel> promise = ctx.executor().newPromise();
        promise.addListener(new FutureListener<Channel>() {
            public void operationComplete(final Future<Channel> future) throws Exception {
                final Channel outboundChannel = future.getNow();
                if (future.isSuccess()) {
                    ChannelFuture responseFuture = ctx.channel()
                            .writeAndFlush(new DefaultSocks4CommandResponse(Socks4CommandStatus.SUCCESS));

                    responseFuture.addListener(new ChannelFutureListener() {
                        public void operationComplete(ChannelFuture channelFuture) {
                            ctx.pipeline().remove(SocksServerConnectHandler.this);
                            outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                            ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                        }/*from  w  ww.j  a  v a  2  s.c  o m*/
                    });
                } else {
                    ctx.channel().writeAndFlush(
                            new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop()).channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000).option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.dstAddr(), request.dstPort()).addListener(new ChannelFutureListener() {
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(
                            new DefaultSocks4CommandResponse(Socks4CommandStatus.REJECTED_OR_FAILED));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    } else if (message instanceof Socks5CommandRequest) {
        final Socks5CommandRequest request = (Socks5CommandRequest) message;
        Promise<Channel> promise = ctx.executor().newPromise();
        promise.addListener(new FutureListener<Channel>() {
            public void operationComplete(final Future<Channel> future) throws Exception {
                final Channel outboundChannel = future.getNow();
                if (future.isSuccess()) {
                    ChannelFuture responseFuture = ctx.channel()
                            .writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.SUCCESS,
                                    request.dstAddrType(), request.dstAddr(), request.dstPort()));

                    responseFuture.addListener(new ChannelFutureListener() {
                        public void operationComplete(ChannelFuture channelFuture) {
                            ctx.pipeline().remove(SocksServerConnectHandler.this);
                            outboundChannel.pipeline().addLast(new RelayHandler(ctx.channel()));
                            ctx.pipeline().addLast(new RelayHandler(outboundChannel));
                        }
                    });
                } else {
                    ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.FAILURE,
                            request.dstAddrType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });

        final Channel inboundChannel = ctx.channel();
        b.group(inboundChannel.eventLoop()).channel(NioSocketChannel.class)
                .option(ChannelOption.CONNECT_TIMEOUT_MILLIS, 10000).option(ChannelOption.SO_KEEPALIVE, true)
                .handler(new DirectClientHandler(promise));

        b.connect(request.dstAddr(), request.dstPort()).addListener(new ChannelFutureListener() {
            public void operationComplete(ChannelFuture future) throws Exception {
                if (future.isSuccess()) {
                    // Connection established use handler provided results
                } else {
                    // Close the connection if the connection attempt has failed.
                    ctx.channel().writeAndFlush(new DefaultSocks5CommandResponse(Socks5CommandStatus.FAILURE,
                            request.dstAddrType()));
                    SocksServerUtils.closeOnFlush(ctx.channel());
                }
            }
        });
    } else {
        ctx.close();
    }
}