Example usage for io.netty.buffer ByteBuf isReadable

List of usage examples for io.netty.buffer ByteBuf isReadable

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Introduction

In this page you can find the example usage for io.netty.buffer ByteBuf isReadable.

Prototype

public abstract boolean isReadable();

Source Link

Document

Returns true if and only if (this.writerIndex - this.readerIndex) is greater than 0 .

Usage

From source file:com.corundumstudio.socketio.SocketIOEncoder.java

License:Apache License

private void handle(WebSocketPacketMessage webSocketPacketMessage, Channel channel, ByteBuf out)
        throws IOException {
    encoder.encodePacket(webSocketPacketMessage.getPacket(), out);
    WebSocketFrame res = new TextWebSocketFrame(out);
    log.trace("Out message: {} sessionId: {}", out.toString(CharsetUtil.UTF_8),
            webSocketPacketMessage.getSessionId());
    channel.writeAndFlush(res);/*from   w  w  w.  j  a  va2 s.c  om*/
    if (!out.isReadable()) {
        out.release();
    }
}

From source file:com.crm.provisioning.thread.osa.CallbackServerHandler.java

License:Apache License

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

        if (is100ContinueExpected(request)) {
            send100Continue(ctx);/*from w ww . j av a  2 s .  c om*/
        }

        buffer.setLength(0);
        requestDate = new Date();
        appendDecoderResult(buffer, request);
    }

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

        ByteBuf content = httpContent.content();
        if (content.isReadable()) {
            buffer.append(content.toString(CharsetUtil.UTF_8));

            appendDecoderResult(buffer, request);
        }

        if (msg instanceof LastHttpContent) {
            String actionType = parserContent();

            writeResponse((LastHttpContent) msg, ctx, actionType);
        }
    }
}

From source file:com.dwarf.netty.guide.http.snoop.HttpSnoopServerHandler.java

License:Apache License

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

        if (HttpHeaderUtil.is100ContinueExpected(request)) {
            send100Continue(ctx);/*from   w  w  w  .  j  a  v a2s  . com*/
        }

        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(request.headers().get(HOST, "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<CharSequence, CharSequence> h : headers) {
                CharSequence key = h.getKey();
                CharSequence 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 (CharSequence name : trailer.trailingHeaders().names()) {
                    for (CharSequence 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:com.example.discard.DiscardServerHandler.java

License:Apache License

@Override
public void channelRead(final ChannelHandlerContext ctx, final Object msg) {
    log.info("message coming.");
    final ByteBuf byteBuf = (ByteBuf) msg;
    final EmitterProcessor<Byte> emitter = EmitterProcessor.create();

    // ??? ByteBuf.toString(StandardCharset.UTF_8) ????
    final Mono<String> messageMono = emitter.collectList().map(DiscardServerHandler::unBoxing)
            .map(bs -> new String(bs, StandardCharsets.UTF_8));
    messageMono.subscribe(message -> log.info("received message: {}", message));
    messageMono.doOnTerminate(() -> ReferenceCountUtil.release(byteBuf));

    while (byteBuf.isReadable()) {
        emitter.onNext(byteBuf.readByte());
    }//w ww. j a va2 s .  c  o  m
    emitter.onComplete();
}

From source file:com.facebook.nifty.core.NiftyDispatcher.java

License:Apache License

private void writeResponse(ChannelHandlerContext ctx, TNiftyTransport messageTransport,
        int responseSequenceId) {
    // Ensure responses to requests are written in the same order the requests
    // were received.
    synchronized (responseMap) {
        ByteBuf response = messageTransport.getOutputBuffer();
        ThriftTransportType transportType = messageTransport.getTransportType();
        int currentResponseId = lastResponseWrittenId.get() + 1;
        if (responseSequenceId != currentResponseId) {
            // This response is NOT next in line of ordered responses, save it to
            // be sent later, after responses to all earlier requests have been
            // sent.
            responseMap.put(responseSequenceId, response);
        } else {// w  ww  . j  ava 2 s. c o  m
            // This response was next in line, write this response now, and see if
            // there are others next in line that should be sent now as well.
            do {
                if (response.isReadable()) {
                    response = addFraming(ctx, response, transportType);
                    //ctx.nextOutboundByteBuffer().writeBytes(response);
                    ctx.channel().write(response);
                    //response.release();
                }
                lastResponseWrittenId.incrementAndGet();
                ++currentResponseId;
                response = responseMap.remove(currentResponseId);
            } while (null != response);

            ctx.channel().flush();

            // Now that we've written some responses, check if reads should be unblocked
            if (isChannelReadBlocked(ctx)) {
                int lastRequestSequenceId = dispatcherSequenceId.get();
                if (lastRequestSequenceId <= lastResponseWrittenId.get() + queuedResponseLimit) {
                    unblockChannelReads(ctx);
                }
            }
        }
    }
}

From source file:com.facebook.nifty.core.NiftyDispatcher.java

License:Apache License

private ByteBuf addFraming(ChannelHandlerContext ctx, ByteBuf response, ThriftTransportType transportType) {
    if (!response.isReadable()) {
        // Empty response from one-way message, don't frame it
        return response;
    }//from  w  w w. j  av  a 2s  .c  o  m

    if (transportType == ThriftTransportType.UNFRAMED) {
        return response;
    } else if (transportType == ThriftTransportType.FRAMED) {
        ByteBuf frameSizeBuffer = ctx.alloc().buffer(4);
        frameSizeBuffer.writeInt(response.readableBytes());
        return Unpooled.wrappedBuffer(frameSizeBuffer, response);
    } else {
        throw new UnsupportedOperationException("Header protocol is not supported");
    }
}

From source file:com.facebook.nifty.core.ThriftFrameDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf buffer, List<Object> out) throws Exception {

    if (!buffer.isReadable()) {
        return;//from  www  .  j  a  v  a  2  s.c  o m
    }
    TTransport ttransport = null;
    short firstByte = buffer.getUnsignedByte(0);
    if (firstByte >= 0x80) {
        // A non-zero MSB for the first byte of the message implies the message starts with a
        // protocol id (and thus it is unframed).
        ttransport = tryDecodeUnframedMessage(ctx, buffer);
    } else if (buffer.readableBytes() < MESSAGE_FRAME_SIZE) {
        // Expecting a framed message, but not enough bytes available to read the frame size
        ttransport = null;
        log.error("Expecting a framed message, but not enough bytes available to read the frame size {}",
                MESSAGE_FRAME_SIZE);
    } else {
        // Messages with a zero MSB in the first byte are framed messages
        ttransport = tryDecodeFramedMessage(ctx, buffer);
    }
    if (ttransport != null) {
        out.add(ttransport);
    } else {
        log.error("ttransport is null , firstByte is {}", firstByte);
    }
}

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

License:Apache License

/**
 * ??//from w  w w .ja  v a 2  s .c o  m
 */
public void channelRead2(ChannelHandlerContext ctx, Object msg) throws Exception {
    ByteBuf in = (ByteBuf) msg;
    try {
        while (in.isReadable()) {
            System.out.print((char) in.readByte());
            System.out.flush();
        }
    } finally {
        ReferenceCountUtil.release(msg);
    }
}

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

License:Apache License

/**
 * ???/*from  www  .  java2  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.flysoloing.learning.network.netty.http.snoop.HttpSnoopServerHandler.java

License:Apache License

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

        if (HttpUtil.is100ContinueExpected(request)) {
            send100Continue(ctx);/*from   ww  w  .  ja v a2s  .  c o 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(request.headers().get(HttpHeaderNames.HOST, "unknown")).append("\r\n");
        buf.append("REQUEST_URI: ").append(request.uri()).append("\r\n\r\n");

        HttpHeaders headers = request.headers();
        if (!headers.isEmpty()) {
            for (Entry<String, String> h : headers) {
                CharSequence key = h.getKey();
                CharSequence 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 (CharSequence name : trailer.trailingHeaders().names()) {
                    for (CharSequence 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);
            }
        }
    }
}