Example usage for io.netty.buffer ByteBuf readerIndex

Introduction

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

Prototype

public abstract int readerIndex();

Source Link

Document

Returns the readerIndex of this buffer.

Usage

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTPMessage.java

License:Apache License

/**
 * Create a human readable string representation of binary data, keeping printable ascii and hex
 * encoding everything else./*w  w  w . j a  va 2s  .  c o m*/
 *
 * @param data The data
 * @return A human readable string representation of the data.
 */
private static String toString(final ByteBuf data) {
    if (data == null) {
        return null;
    }
    final StringBuilder sb = new StringBuilder();
    for (int i = data.readerIndex(); i < data.writerIndex(); i++) {
        final byte b = data.getByte(i);
        if (b > 31 && b < 127) {
            if (b == '%') {
                sb.append('%');
            }
            sb.append((char) b);
        } else {
            sb.append('%');
            sb.append(String.format("%02X", b));
        }
    }
    return sb.toString();
}

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From source file:com.spotify.netty4.handler.codec.zmtp.ZMTPMessage.java

License:Apache License

/**
 * Convenience method for reading a {@link ZMTPMessage} from a {@link ByteBuf}.
 *//*from  w  w  w .  j  a  v a  2s .c om*/
public static ZMTPMessage read(final ByteBuf in, final ZMTPVersion version) throws ZMTPParsingException {
    final int mark = in.readerIndex();
    final ZMTPWireFormat wireFormat = ZMTPWireFormats.wireFormat(version);
    final ZMTPWireFormat.Header header = wireFormat.header();
    final RecyclableArrayList frames = RecyclableArrayList.newInstance();
    while (true) {
        final boolean read = header.read(in);
        if (!read) {
            frames.recycle();
            in.readerIndex(mark);
            return null;
        }
        if (in.readableBytes() < header.length()) {
            frames.recycle();
            in.readerIndex(mark);
            return null;
        }
        if (header.length() > Integer.MAX_VALUE) {
            throw new ZMTPParsingException("frame is too large: " + header.length());
        }
        final ByteBuf frame = in.readSlice((int) header.length());
        frame.retain();
        frames.add(frame);
        if (!header.more()) {
            @SuppressWarnings("unchecked")
            final ZMTPMessage message = ZMTPMessage.from((List<ByteBuf>) (Object) frames);
            frames.recycle();
            return message;
        }
    }
}

---

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTPMessageEncoder.java

License:Apache License

@Override
public void encode(final Object msg, final ZMTPWriter writer) {
    final ZMTPMessage message = (ZMTPMessage) msg;
    for (int i = 0; i < message.size(); i++) {
        final ByteBuf frame = message.frame(i);
        final boolean more = i < message.size() - 1;
        final ByteBuf dst = writer.frame(frame.readableBytes(), more);
        dst.writeBytes(frame, frame.readerIndex(), frame.readableBytes());
    }//from w w w  .ja va 2  s . co  m
}

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From source file:com.streamsets.pipeline.lib.parser.net.DelimitedLengthFieldBasedFrameDecoder.java

License:Apache License

public DelimitedLengthFieldBasedFrameDecoder(int maxFrameLength, int lengthAdjustment, boolean failFast,
        ByteBuf delimiter, Charset lengthFieldCharset, boolean trimLengthString) {
    if (delimiter == null) {
        throw new NullPointerException("delimiter");
    }//  ww w . j a  va 2 s.  c  o  m
    if (!delimiter.isReadable()) {
        throw new IllegalArgumentException("empty delimiter");
    }

    this.delimiter = delimiter.slice(delimiter.readerIndex(), delimiter.readableBytes());
    this.lengthFieldCharset = lengthFieldCharset;

    this.maxFrameLength = maxFrameLength;
    this.lengthAdjustment = lengthAdjustment;
    this.failFast = failFast;
    this.trimLengthString = trimLengthString;
}

---

From source file:com.streamsets.pipeline.lib.parser.net.DelimitedLengthFieldBasedFrameDecoder.java

License:Apache License

/**
 * Create a frame out of the {@link ByteBuf} and return it.
 *
 * @param ctx the {@link ChannelHandlerContext} which this {@link ByteToMessageDecoder} belongs to
 * @param in the {@link ByteBuf} from which to read data
 * @return frame           the {@link ByteBuf} which represent the frame or {@code null} if no frame could
 * be created.//from   w  w w  . ja  v  a2 s .  c  o  m
 */
protected Object decode(ChannelHandlerContext ctx, ByteBuf in) throws Exception {
    if (discardingTooLongFrame) {
        long bytesToDiscard = this.bytesToDiscard;
        int localBytesToDiscard = (int) Math.min(bytesToDiscard, in.readableBytes());
        in.skipBytes(localBytesToDiscard);
        bytesToDiscard -= localBytesToDiscard;
        this.bytesToDiscard = bytesToDiscard;

        failIfNecessary(false);
        return null;
    }

    if (consumingLength) {
        int delimIndex = indexOf(in, delimiter);
        if (delimIndex < 0) {
            return null;
        }

        final String lengthStr = in.toString(in.readerIndex(), delimIndex, lengthFieldCharset);
        try {
            frameLength = Long.parseLong(trimLengthString ? lengthStr.trim() : lengthStr);
        } catch (NumberFormatException e) {
            throw new CorruptedFrameException(String.format("Invalid length field decoded (in %s charset): %s",
                    lengthFieldCharset.name(), lengthStr), e);
        }

        if (frameLength < 0) {
            throw new CorruptedFrameException("negative pre-adjustment length field: " + frameLength);
        }

        frameLength += lengthAdjustment;

        //consume length field and delimiter bytes
        in.skipBytes(delimIndex + delimiter.capacity());

        //consume delimiter bytes
        consumingLength = false;
    }

    if (frameLength > maxFrameLength) {
        long discard = frameLength - in.readableBytes();
        tooLongFrameLength = frameLength;

        if (discard < 0) {
            // buffer contains more bytes then the frameLength so we can discard all now
            in.skipBytes((int) frameLength);
        } else {
            // Enter the discard mode and discard everything received so far.
            discardingTooLongFrame = true;
            consumingLength = true;
            bytesToDiscard = discard;
            in.skipBytes(in.readableBytes());
        }
        failIfNecessary(true);
        return null;
    }

    // never overflows because it's less than maxFrameLength
    int frameLengthInt = (int) frameLength;
    if (in.readableBytes() < frameLengthInt) {
        // need more bytes available to read actual frame
        return null;
    }

    // the frame is now entirely present, reset state vars
    consumingLength = true;
    frameLength = 0;

    // extract frame
    int readerIndex = in.readerIndex();
    int actualFrameLength = frameLengthInt;// - initialBytesToStrip;
    ByteBuf frame = extractFrame(ctx, in, readerIndex, actualFrameLength);
    in.readerIndex(readerIndex + actualFrameLength);
    return frame;
}

---

From source file:com.streamsets.pipeline.lib.parser.net.DelimitedLengthFieldBasedFrameDecoder.java

License:Apache License

/**
 * Returns the number of bytes between the readerIndex of the haystack and
 * the first needle found in the haystack.  -1 is returned if no needle is
 * found in the haystack.//  w  w  w.j a  va2s.  c  om
 */
private static int indexOf(ByteBuf haystack, ByteBuf needle) {
    for (int i = haystack.readerIndex(); i < haystack.writerIndex(); i++) {
        int haystackIndex = i;
        int needleIndex;
        for (needleIndex = 0; needleIndex < needle.capacity(); needleIndex++) {
            if (haystack.getByte(haystackIndex) != needle.getByte(needleIndex)) {
                break;
            } else {
                haystackIndex++;
                if (haystackIndex == haystack.writerIndex() && needleIndex != needle.capacity() - 1) {
                    return -1;
                }
            }
        }

        if (needleIndex == needle.capacity()) {
            // Found the needle from the haystack!
            return i - haystack.readerIndex();
        }
    }
    return -1;
}

---

From source file:com.talent.balance.common.ParseUtils.java

License:Open Source License

public static int processReadIndex(ByteBuf buffer) {
    int newReaderIndex = buffer.readerIndex();
    if (newReaderIndex < (buffer.capacity())) {
        buffer.readerIndex(newReaderIndex + 1);
        return 1;
    }//  w  w w.ja  v a  2  s . co  m
    return 0;
}

---

From source file:com.talent.mysql.packet.MysqlResponsePacket.java

License:Open Source License

public PacketWithMeta<Packet> decode(ByteBuf byteBuf) throws DecodeException {
    int capacity = byteBuf.capacity();
    PacketWithMeta<Packet> packetWithMeta = null;
    while (true) {
        if ((capacity - byteBuf.readerIndex()) < MysqlHeader.HEADER_LEN) //?
        {/*from w ww .  ja v  a  2  s . co  m*/
            if (packetWithMeta != null) {
                packetWithMeta.setPacketLenght(byteBuf.readerIndex());
            }

            return packetWithMeta;
        }

        if (byteBuf.order() == ByteOrder.BIG_ENDIAN) {
            byteBuf = byteBuf.order(ByteOrder.LITTLE_ENDIAN);
        }

        MysqlHeader header = MysqlHeaderFactory.borrow();
        header.decode(byteBuf);

        ParseUtils.processReadIndex(byteBuf);

        //?
        if (capacity - byteBuf.readerIndex() < header.getBodyLength()) //?
        {
            if (packetWithMeta != null) {
                packetWithMeta.setPacketLenght(byteBuf.readerIndex());
            }
            return packetWithMeta;
        } else {
            T t = decodeBody(byteBuf, header);
            if (packetWithMeta == null) {
                packetWithMeta = new PacketWithMeta<Packet>();

                List<Packet> packets = new ArrayList<Packet>();
                packets.add(t);

                packetWithMeta.setPackets(packets);
                packetWithMeta.setPacketLenght(byteBuf.readerIndex());
                return packetWithMeta;

                //               com.talent.mysql.packet.factory.MysqlHeaderFactory.returnObj(t.getMysqlHeader());
            } else {
                packetWithMeta.getPackets().add(t);
            }
        }
    }

}

---

From source file:com.talent.mysql.packet.request.AuthPacket.java

License:Open Source License

@Override
public void encodeBody(ByteBuf byteBuf) {
    int index = byteBuf.readerIndex();
    String xx = Long.toBinaryString(clientFlags);
    byteBuf.setLong(index, clientFlags);
    index += 4;//from   w w w . ja  va  2s  . c o m

    byteBuf.setLong(index, maxPacketSize);
    index += 4;

    byteBuf.setByte(index, charsetIndex);
    index++;

    byteBuf.setBytes(index, extra);
    index += extra.length;

    byteBuf.setBytes(index, user);
    index += user.length;

    byteBuf.setByte(index, 0);
    index++;

    byteBuf.setByte(index, passwordLen);
    index++;

    byteBuf.setBytes(index, password);
    index += password.length;

    byteBuf.setBytes(index, database);
    index += database.length;

    byteBuf.setByte(index, 0);
    index++;
}

---

From source file:com.talent.mysql.packet.request.AuthPacket.java

License:Open Source License

public void decodeBody(ByteBuf _byteBuf) {
    byte[] bs = new byte[] { -117, -93, 2, 0, 0, 0, 0, 64, 33, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
            0, 0, 0, 0, 0, 0, 0, 114, 111, 111, 116, 0, 20, -19, -111, -3, 39, -46, -116, -128, -44, -112, -26,
            -48, 42, 70, -85, 8, 83, 83, 100, 103, 68, 116, 97, 108, 101, 110, 116, 95, 98, 97, 115, 101, 119,
            101, 98, 50, 48, 49, 0 };/*  ww w . ja v a 2 s  .  c o m*/
    ByteBuf byteBuf = Unpooled.buffer(bs.length);
    byteBuf = byteBuf.order(ByteOrder.LITTLE_ENDIAN);
    byteBuf.setBytes(0, bs, 0, bs.length);

    int _index = byteBuf.readerIndex();
    int index = _index;

    clientFlags = byteBuf.getInt(index); //172939
    index += 4;

    maxPacketSize = byteBuf.getInt(index); //1073741824
    index += 4;

    charsetIndex = byteBuf.getByte(index); //33
    index += 1;

    index += extra.length;

    int len = 0;
    while (byteBuf.getByte(index + len) != 0) {
        len++;
    }
    user = new byte[len];
    byteBuf.getBytes(index, user, 0, len);
    index += len;
    index++;

    passwordLen = byteBuf.getByte(index);
    index += 1;

    password = new byte[passwordLen];
    byteBuf.getBytes(index, password, 0, passwordLen);

    len = 0;
    while (byteBuf.getByte(index + len) != 0) {
        len++;
    }
    database = new byte[len];
    byteBuf.getBytes(index, database, 0, len);
    index += len;
    index++;

}

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