Example usage for io.netty.buffer ByteBuf indexOf

Introduction

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

Prototype

public abstract int indexOf(int fromIndex, int toIndex, byte value);

Source Link

Document

Locates the first occurrence of the specified value in this buffer.

Usage

From source file:org.traccar.protocol.WatchFrameDecoder.java

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    int endIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ']') + 1;
    if (endIndex > 0) {
        ByteBuf frame = Unpooled.buffer();
        while (buf.readerIndex() < endIndex) {
            byte b1 = buf.readByte();
            if (b1 == '}') {
                byte b2 = buf.readByte();
                switch (b2) {
                case 0x01:
                    frame.writeByte('}');
                    break;
                case 0x02:
                    frame.writeByte('[');
                    break;
                case 0x03:
                    frame.writeByte(']');
                    break;
                case 0x04:
                    frame.writeByte(',');
                    break;
                case 0x05:
                    frame.writeByte('*');
                    break;
                default:
                    throw new IllegalArgumentException(
                            String.format("unexpected byte at %d: 0x%02x", buf.readerIndex() - 1, b2));
                }//www.jav a  2  s .  co m
            } else {
                frame.writeByte(b1);
            }
        }
        return frame;
    }

    return null;
}

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From source file:org.traccar.protocol.WatchProtocolDecoder.java

License:Apache License

@Override
protected Object decode(Channel channel, SocketAddress remoteAddress, Object msg) throws Exception {

    ByteBuf buf = (ByteBuf) msg;

    buf.skipBytes(1); // '[' header
    manufacturer = buf.readSlice(2).toString(StandardCharsets.US_ASCII);
    buf.skipBytes(1); // '*' delimiter

    int idIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
    String id = buf.readSlice(idIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);
    DeviceSession deviceSession = getDeviceSession(channel, remoteAddress, id);
    if (deviceSession == null) {
        return null;
    }/*from  ww w .j  a v a 2  s.  c  o  m*/

    buf.skipBytes(1); // '*' delimiter

    String index = null;
    int contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*');
    if (contentIndex + 5 < buf.writerIndex() && buf.getByte(contentIndex + 5) == '*'
            && buf.toString(contentIndex + 1, 4, StandardCharsets.US_ASCII).matches("\\p{XDigit}+")) {
        int indexLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) '*') - buf.readerIndex();
        hasIndex = true;
        index = buf.readSlice(indexLength).toString(StandardCharsets.US_ASCII);
        buf.skipBytes(1); // '*' delimiter
    }

    buf.skipBytes(4); // length
    buf.skipBytes(1); // '*' delimiter

    buf.writerIndex(buf.writerIndex() - 1); // ']' ignore ending

    contentIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
    if (contentIndex < 0) {
        contentIndex = buf.writerIndex();
    }

    String type = buf.readSlice(contentIndex - buf.readerIndex()).toString(StandardCharsets.US_ASCII);

    if (contentIndex < buf.writerIndex()) {
        buf.readerIndex(contentIndex + 1);
    }

    if (type.equals("INIT")) {

        sendResponse(channel, id, index, "INIT,1");

    } else if (type.equals("LK")) {

        sendResponse(channel, id, index, "LK");

        if (buf.isReadable()) {
            String[] values = buf.toString(StandardCharsets.US_ASCII).split(",");
            if (values.length >= 3) {
                Position position = new Position(getProtocolName());
                position.setDeviceId(deviceSession.getDeviceId());

                getLastLocation(position, null);

                position.set(Position.KEY_BATTERY_LEVEL, Integer.parseInt(values[2]));

                return position;
            }
        }

    } else if (type.equals("UD") || type.equals("UD2") || type.equals("UD3") || type.equals("AL")
            || type.equals("WT")) {

        Position position = decodePosition(deviceSession, buf.toString(StandardCharsets.US_ASCII));

        if (type.equals("AL")) {
            if (position != null) {
                position.set(Position.KEY_ALARM, Position.ALARM_SOS);
            }
            sendResponse(channel, id, index, "AL");
        }

        return position;

    } else if (type.equals("TKQ")) {

        sendResponse(channel, id, index, "TKQ");

    } else if (type.equals("PULSE") || type.equals("heart") || type.equals("bphrt")) {

        if (buf.isReadable()) {

            Position position = new Position(getProtocolName());
            position.setDeviceId(deviceSession.getDeviceId());

            getLastLocation(position, new Date());

            String[] values = buf.toString(StandardCharsets.US_ASCII).split(",");
            int valueIndex = 0;

            if (type.equals("bphrt")) {
                position.set("pressureHigh", values[valueIndex++]);
                position.set("pressureLow", values[valueIndex++]);
            }
            position.set(Position.KEY_HEART_RATE, Integer.parseInt(values[valueIndex]));

            return position;

        }

    } else if (type.equals("img")) {

        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        getLastLocation(position, null);

        int timeIndex = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) ',');
        buf.readerIndex(timeIndex + 12 + 2);
        position.set(Position.KEY_IMAGE, Context.getMediaManager().writeFile(id, buf, "jpg"));

        return position;

    } else if (type.equals("TK")) {

        if (buf.readableBytes() == 1) {
            byte result = buf.readByte();
            if (result != '1') {
                LOGGER.warn(type + "," + result);
            }
            return null;
        }

        Position position = new Position(getProtocolName());
        position.setDeviceId(deviceSession.getDeviceId());

        getLastLocation(position, null);

        position.set(Position.KEY_AUDIO, Context.getMediaManager().writeFile(id, buf, "amr"));

        return position;

    }

    return null;
}

---

From source file:org.traccar.protocol.XexunFrameDecoder.java

License:Apache License

@Override
protected Object decode(ChannelHandlerContext ctx, Channel channel, ByteBuf buf) throws Exception {

    if (buf.readableBytes() < 80) {
        return null;
    }//from  ww w  . jav  a  2 s .  c  o m

    int beginIndex = BufferUtil.indexOf("GPRMC", buf);
    if (beginIndex == -1) {
        beginIndex = BufferUtil.indexOf("GNRMC", buf);
        if (beginIndex == -1) {
            return null;
        }
    }

    int identifierIndex = BufferUtil.indexOf("imei:", buf, beginIndex, buf.writerIndex());
    if (identifierIndex == -1) {
        return null;
    }

    int endIndex = buf.indexOf(identifierIndex, buf.writerIndex(), (byte) ',');
    if (endIndex == -1) {
        return null;
    }

    buf.skipBytes(beginIndex - buf.readerIndex());

    return buf.readRetainedSlice(endIndex - beginIndex + 1);
}

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From source file:pub.vrtech.protocol.RedisCommandCodec.java

License:Apache License

/***
 * ?//from  w ww .  ja  v a  2s .c o  m
 * 
 * @param is
 *            bytebuff?
 * @return
 * @throws IOException
 */
private long readLength(ByteBuf is) throws IOException {
    final int readerIndex = is.readerIndex();
    final int index = is.indexOf(is.readerIndex(), is.writerIndex(), LF);
    byte[] bytesArray = new byte[index - readerIndex - 1];
    is.readBytes(bytesArray);// 
    is.skipBytes(2);//  /r/n
    return BytesUtils.byteArray2Integer(bytesArray);
}

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From source file:ratpack.sse.internal.ServerSentEventDecoder.java

License:Apache License

private static boolean skipTillFirstMatching(ByteBuf byteBuf, byte thing) {
    int i = byteBuf.indexOf(byteBuf.readerIndex(), byteBuf.capacity(), thing);
    if (-1 == i) {
        return false;
    } else {//  ww w. j a  va  2 s. co  m
        byteBuf.readByte();
        return true;
    }
}

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