Example usage for io.netty.buffer ByteBuf writeByte

Introduction

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

Prototype

public abstract ByteBuf writeByte(int value);

Source Link

Document

Sets the specified byte at the current writerIndex and increases the writerIndex by 1 in this buffer.

Usage

From source file:com.mastfrog.scamper.compression.CompressingCodec.java

License:Open Source License

@Override
public ByteBuf encode(MessageType type, ByteBuf outbound, Channel channel) {
    try {//from  w  w  w.j a  v a 2s .  c o  m
        ByteBuf head = channel.alloc().buffer(type.headerLength() + 1);
        head.writeByte(magicNumber());
        type.writeHeader(head);
        ByteBuf compressed = channel.alloc().buffer();
        compress(outbound, compressed);
        ByteBuf result = channel.alloc().compositeBuffer(2).addComponent(head).addComponent(compressed);
        result.writerIndex(head.readableBytes() + compressed.readableBytes());
        return result;
    } catch (Exception ex) {
        return Exceptions.chuck(ex);
    }
}

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From source file:com.mastfrog.scamper.MessageType.java

License:Open Source License

/**
 * Write this mesage type into a ByteBuf
 *
 * @param buf The buffeer/*from  w  ww  .  j a  va 2 s.com*/
 * @return the buffer
 */
public ByteBuf writeHeader(ByteBuf buf) {
    return buf.writeByte(byteOne).writeByte(byteTwo);
}

---

From source file:com.mnt.base.stream.client.NClientNIOConnection.java

License:Open Source License

@Override
public void deliverWaitPacket() {
    ByteBuf buf = channelHandlerContext.alloc().buffer(1);
    buf.writeByte(0);
    channelHandlerContext.writeAndFlush(buf);
}

---

From source file:com.mnt.base.stream.netty.NStreamEncoder.java

License:Open Source License

@Override
protected void encode(ChannelHandlerContext ctx, StreamPacket packet, ByteBuf out) throws Exception {

    Attribute<NStreamLightweightParser> parserAttr = ctx.channel().attr(NStreamDecoder.NSTREAM_PARSER_KEY);
    NStreamLightweightParser parser = parserAttr.get();
    if (parser == null) {
        parser = new NStreamLightweightParser();
        parserAttr.set(parser);/*  w  w w .j a v a2 s.  c  om*/
    }

    ByteArrays source = packet.getSource();

    out.writeByte(StreamPacketDef.BYTE_STREAM_PACKET_START);
    out.writeBytes(BytesUtil.intToBytes(source.getTotalLength()));

    for (ByteArray ba : source.getByteArrays()) {
        out.writeBytes(ba.getBytes(), ba.getPosition(), ba.getLength());
    }

    out.writeBytes(BytesUtil.genSign(source));
    out.writeByte(StreamPacketDef.BYTE_STREAM_PACKET_END);
}

---

From source file:com.mobius.software.android.iotbroker.mqtt.parser.MQParser.java

License:Open Source License

public static ByteBuf encode(MQMessage header) throws UnsupportedEncodingException, MalformedMessageException {
    int length = header.getLength();
    ByteBuf buf = getBuffer(length);
    MessageType type = header.getType();

    switch (type) {
    case CONNECT:
        Connect connect = (Connect) header;
        if (connect.isWillFlag() && !connect.getWill().isValid())
            throw new MalformedMessageException("invalid will encoding");

        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeShort(4);/*from w ww  .j a  va2s .c o m*/
        buf.writeBytes(connect.getName().getBytes());
        buf.writeByte(connect.getProtocolLevel());
        byte contentFlags = 0;
        contentFlags |= 0;
        contentFlags |= connect.isClean() ? 0x02 : 0;
        contentFlags |= connect.isWillFlag() ? 0x04 : 0;
        contentFlags |= connect.isWillFlag() ? connect.getWill().getTopic().getQos().getValue() << 3 : 0;
        contentFlags |= connect.isWillFlag() ? connect.getWill().getRetain() ? 0x20 : 0 : 0;
        contentFlags |= connect.isUsernameFlag() ? 0x40 : 0;
        contentFlags |= connect.isPasswordFlag() ? 0x80 : 0;
        buf.writeByte(contentFlags);
        buf.writeShort(connect.getKeepAlive());
        buf.writeShort(connect.getClientID().length());
        buf.writeBytes(connect.getClientID().getBytes("UTF-8"));

        if (connect.isWillFlag()) {
            Text willTopic = connect.getWill().getTopic().getName();
            if (willTopic != null) {
                buf.writeShort(willTopic.length());
                buf.writeBytes(willTopic.toString().getBytes("UTF-8"));
            }

            byte[] willMessage = connect.getWill().getContent();
            if (willMessage != null) {
                buf.writeShort(willMessage.length);
                buf.writeBytes(willMessage);
            }
        }

        String username = connect.getUserName();
        if (username != null) {
            buf.writeShort(username.length());
            buf.writeBytes(username.getBytes("UTF-8"));
        }

        String password = connect.getPassword();
        if (password != null) {
            buf.writeShort(password.length());
            buf.writeBytes(password.getBytes("UTF-8"));
        }
        break;

    case CONNACK:
        Connack connack = (Connack) header;
        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeBoolean(connack.isSessionPresent());
        buf.writeByte(connack.getReturnCode().getNum());
        break;

    case PUBLISH:
        Publish publish = (Publish) header;
        byte firstByte = (byte) (type.getNum() << 4);
        firstByte |= publish.isDup() ? 8 : 0;
        firstByte |= (publish.getTopic().getQos().getValue() << 1);
        firstByte |= publish.isRetain() ? 1 : 0;
        buf.setByte(0, firstByte);
        buf.writeShort(publish.getTopic().length());
        buf.writeBytes(publish.getTopic().getName().toString().getBytes("UTF-8"));
        if (publish.getPacketID() != null)
            buf.writeShort(publish.getPacketID());
        buf.writeBytes(publish.getContent());
        break;

    case PUBACK:
        Puback puback = (Puback) header;
        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeShort(puback.getPacketID());
        break;

    case PUBREC:
        Pubrec pubrec = (Pubrec) header;
        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeShort(pubrec.getPacketID());
        break;

    case PUBREL:
        Pubrel pubrel = (Pubrel) header;
        buf.setByte(0, (byte) ((type.getNum() << 4) | 0x2));
        buf.writeShort(pubrel.getPacketID());
        break;

    case PUBCOMP:
        Pubcomp pubcomp = (Pubcomp) header;
        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeShort(pubcomp.getPacketID());
        break;

    case SUBSCRIBE:
        Subscribe sub = (Subscribe) header;
        buf.setByte(0, (byte) ((type.getNum() << 4) | 0x2));
        if (sub.getPacketID() != null)
            buf.writeShort(sub.getPacketID());
        for (Topic subscription : sub.getTopics()) {
            buf.writeShort(subscription.getName().length());
            buf.writeBytes(subscription.getName().toString().getBytes("UTF-8"));
            buf.writeByte(subscription.getQos().getValue());
        }
        break;

    case SUBACK:
        Suback suback = (Suback) header;
        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeShort(suback.getPacketID());
        for (SubackCode code : suback.getReturnCodes())
            buf.writeByte(code.getNum());
        break;

    case UNSUBSCRIBE:
        Unsubscribe unsub = (Unsubscribe) header;
        buf.setByte(0, (byte) ((type.getNum() << 4) | 0x2));
        buf.writeShort(unsub.getPacketID());
        for (Topic topic : unsub.getTopics()) {
            buf.writeShort(topic.getName().length());
            buf.writeBytes(topic.getName().toString().getBytes("UTF-8"));
        }
        break;

    case UNSUBACK:
        Unsuback unsuback = (Unsuback) header;
        buf.setByte(0, (byte) (type.getNum() << 4));
        buf.writeShort(unsuback.getPacketID());
        break;

    case DISCONNECT:
    case PINGREQ:
    case PINGRESP:
        buf.setByte(0, (byte) (type.getNum() << 4));
        break;

    default:
        throw new MalformedMessageException("Invalid header type: " + type);
    }

    return buf;
}

---

From source file:com.mobius.software.android.iotbroker.mqtt.parser.MQParser.java

License:Open Source License

private static ByteBuf getBuffer(final int length) throws MalformedMessageException {
    byte[] lengthBytes;

    if (length <= 127)
        lengthBytes = new byte[1];
    else if (length <= 16383)
        lengthBytes = new byte[2];
    else if (length <= 2097151)
        lengthBytes = new byte[3];
    else if (length <= 26843545)
        lengthBytes = new byte[4];
    else//from ww w  .  ja  v  a2 s  .  c om
        throw new MalformedMessageException("header length exceeds maximum of 26843545 bytes");

    byte encByte;
    int pos = 0, l = length;
    do {
        encByte = (byte) (l % 128);
        l /= 128;
        if (l > 0)
            lengthBytes[pos++] = (byte) (encByte | 128);
        else
            lengthBytes[pos++] = encByte;
    } while (l > 0);

    int bufferSize = 1 + lengthBytes.length + length;
    ByteBuf buf = Unpooled.buffer(bufferSize);

    buf.writeByte(0);
    buf.writeBytes(lengthBytes);

    return buf;
}

---

From source file:com.mobius.software.mqtt.parser.MQParser.java

License:Open Source License

public static ByteBuf encode(MQMessage header) throws MalformedMessageException {
    int length = header.getLength();
    ByteBuf buf = getBuffer(length);
    MessageType type = header.getType();
    try {/* w  ww  .j av a 2 s  .  c o m*/
        switch (type) {
        case CONNECT:
            Connect connect = (Connect) header;
            if (connect.isWillFlag() && !connect.getWill().isValid())
                throw new MalformedMessageException("invalid will encoding");

            buf.setByte(0, (byte) (type.getNum() << 4));
            buf.writeShort(4);
            buf.writeBytes(connect.getName().getBytes());
            buf.writeByte(connect.getProtocolLevel());

            byte contentFlags = 0;
            if (connect.isCleanSession())
                contentFlags += 2;
            if (connect.isWillFlag()) {
                contentFlags += 4;
                contentFlags += connect.getWill().getTopic().getQos().getValue() << 3;
                if (connect.getWill().isRetain())
                    contentFlags += 0x20;
            }
            if (connect.isPasswordFlag())
                contentFlags += 0x40;
            if (connect.isUsernameFlag())
                contentFlags += 0x80;
            buf.writeByte(contentFlags);

            buf.writeShort(connect.getKeepalive());
            buf.writeShort(connect.getClientID().length());
            buf.writeBytes(connect.getClientID().getBytes("UTF-8"));

            if (connect.isWillFlag()) {
                Text willTopic = connect.getWill().getTopic().getName();
                if (willTopic != null) {
                    buf.writeShort(willTopic.length());
                    buf.writeBytes(willTopic.toString().getBytes("UTF-8"));
                }

                byte[] willMessage = connect.getWill().getContent();
                if (willMessage != null) {
                    buf.writeShort(willMessage.length);
                    buf.writeBytes(willMessage);
                }
            }

            String username = connect.getUsername();
            if (username != null) {
                buf.writeShort(username.length());
                buf.writeBytes(username.getBytes("UTF-8"));
            }

            String password = connect.getPassword();
            if (password != null) {
                buf.writeShort(password.length());
                buf.writeBytes(password.getBytes("UTF-8"));
            }
            break;

        case CONNACK:
            Connack connack = (Connack) header;
            buf.setByte(0, (byte) (type.getNum() << 4));
            buf.writeBoolean(connack.isSessionPresent());
            buf.writeByte(connack.getReturnCode().getNum());
            break;

        case PUBLISH:
            Publish publish = (Publish) header;
            byte firstByte = (byte) (type.getNum() << 4);
            firstByte |= publish.isDup() ? 8 : 0;
            firstByte |= (publish.getTopic().getQos().getValue() << 1);
            firstByte |= publish.isRetain() ? 1 : 0;
            buf.setByte(0, firstByte);
            buf.writeShort(publish.getTopic().length());
            buf.writeBytes(publish.getTopic().getName().toString().getBytes("UTF-8"));
            switch (publish.getTopic().getQos()) {
            case AT_MOST_ONCE:
                if (publish.getPacketID() != null)
                    throw new MalformedMessageException("publish qos-0 must not contain packetID");
                break;
            case AT_LEAST_ONCE:
            case EXACTLY_ONCE:
                if (publish.getPacketID() == null)
                    throw new MalformedMessageException("publish qos-1,2 must contain packetID");
                buf.writeShort(publish.getPacketID());
                break;
            }
            buf.writeBytes(publish.getContent());
            break;

        case PUBACK:
            Puback puback = (Puback) header;
            buf.setByte(0, (byte) (type.getNum() << 4));
            if (puback.getPacketID() == null)
                throw new MalformedMessageException("puback must contain packetID");
            buf.writeShort(puback.getPacketID());
            break;

        case PUBREC:
            Pubrec pubrec = (Pubrec) header;
            buf.setByte(0, (byte) (type.getNum() << 4));
            if (pubrec.getPacketID() == null)
                throw new MalformedMessageException("pubrec must contain packetID");
            buf.writeShort(pubrec.getPacketID());
            break;

        case PUBREL:
            Pubrel pubrel = (Pubrel) header;
            buf.setByte(0, (byte) ((type.getNum() << 4) | 0x2));
            if (pubrel.getPacketID() == null)
                throw new MalformedMessageException("pubrel must contain packetID");
            buf.writeShort(pubrel.getPacketID());
            break;

        case PUBCOMP:
            Pubcomp pubcomp = (Pubcomp) header;
            buf.setByte(0, (byte) (type.getNum() << 4));
            if (pubcomp.getPacketID() == null)
                throw new MalformedMessageException("pubcomp must contain packetID");
            buf.writeShort(pubcomp.getPacketID());
            break;

        case SUBSCRIBE:
            Subscribe sub = (Subscribe) header;
            buf.setByte(0, (byte) ((type.getNum() << 4) | 0x2));
            if (sub.getPacketID() == null)
                throw new MalformedMessageException("subscribe must contain packetID");
            buf.writeShort(sub.getPacketID());
            for (Topic subscription : sub.getTopics()) {
                buf.writeShort(subscription.getName().length());
                buf.writeBytes(subscription.getName().toString().getBytes("UTF-8"));
                buf.writeByte(subscription.getQos().getValue());
            }
            break;

        case SUBACK:
            Suback suback = (Suback) header;
            buf.setByte(0, (byte) (type.getNum() << 4));
            if (suback.getPacketID() == null)
                throw new MalformedMessageException("suback must contain packetID");
            buf.writeShort(suback.getPacketID());
            for (SubackCode code : suback.getReturnCodes())
                buf.writeByte(code.getNum());
            break;

        case UNSUBSCRIBE:
            Unsubscribe unsub = (Unsubscribe) header;
            buf.setByte(0, (byte) ((type.getNum() << 4) | 0x2));
            if (unsub.getPacketID() == null)
                throw new MalformedMessageException("subscribe must contain packetID");
            buf.writeShort(unsub.getPacketID());
            for (Text topic : unsub.getTopics()) {
                buf.writeShort(topic.length());
                buf.writeBytes(topic.toString().getBytes("UTF-8"));
            }
            break;

        case UNSUBACK:
            Unsuback unsuback = (Unsuback) header;
            buf.setByte(0, (byte) (type.getNum() << 4));
            if (unsuback.getPacketID() == null)
                throw new MalformedMessageException("unsuback must contain packetID");
            buf.writeShort(unsuback.getPacketID());
            break;

        case DISCONNECT:
        case PINGREQ:
        case PINGRESP:
            buf.setByte(0, (byte) (type.getNum() << 4));
            break;

        default:
            throw new MalformedMessageException("Invalid header type: " + type);
        }

        return buf;
    } catch (UnsupportedEncodingException e) {
        throw new MalformedMessageException("unsupported string encoding:" + e.getMessage());
    }
}

---

From source file:com.mobius.software.mqtt.parser.MQParser.java

License:Open Source License

public static ByteBuf getBuffer(final int length) throws MalformedMessageException {
    byte[] lengthBytes;

    if (length <= 127)
        lengthBytes = new byte[1];
    else if (length <= 16383)
        lengthBytes = new byte[2];
    else if (length <= 2097151)
        lengthBytes = new byte[3];
    else if (length <= 26843545)
        lengthBytes = new byte[4];
    else/* ww w . j  a va  2 s  . com*/
        throw new MalformedMessageException("header length exceeds maximum of 26843545 bytes");

    byte encByte;
    int pos = 0, l = length;
    do {
        encByte = (byte) (l % 128);
        l /= 128;
        if (l > 0)
            lengthBytes[pos++] = (byte) (encByte | 128);
        else
            lengthBytes[pos++] = encByte;
    } while (l > 0);

    int bufferSize = 1 + lengthBytes.length + length;
    ByteBuf buf = Unpooled.buffer(bufferSize);

    buf.writeByte(0);
    buf.writeBytes(lengthBytes);

    return buf;
}

---

From source file:com.mobius.software.mqtt.parser.test.TestParser.java

License:Open Source License

@Test
public void testPositivenext() throws MalformedMessageException {
    ByteBuf buf = Unpooled.buffer(114);
    buf.writeByte(0x82);
    buf.writeByte(0x66);//from  w w w.j av a 2 s.  c  o m
    buf.writeShort(10);
    buf.writeShort(97);
    buf.writeBytes(new byte[96]);
    buf.writeByte(1);
    buf.writeByte(0);
    assertEquals("Invalid next header length", 104, MQParser.next(buf).capacity());
    assertEquals("buffer index was not reset", 0, buf.readerIndex());
}

---

From source file:com.mobius.software.mqtt.parser.test.TestParser.java

License:Open Source License

@Test(expected = MalformedMessageException.class)
public void testNegativeNext() throws MalformedMessageException {
    ByteBuf buf = Unpooled.buffer(103);
    buf.writeByte(0x82);
    buf.writeByte(0x66); //encoded l=104, actual l=103
    buf.writeShort(10);//w ww.  j a v a 2 s. com
    buf.writeShort(97);
    buf.writeBytes(new byte[96]);
    buf.writeByte(1);
    MQParser.next(buf);
}

---

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