Example usage for io.netty.buffer ByteBuf skipBytes

Introduction

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

Prototype

public abstract ByteBuf skipBytes(int length);

Source Link

Document

Increases the current readerIndex by the specified length in this buffer.

Usage

From source file:com.shelf.messagepack.MessagePackFrameDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    long frameLength = decodeLength(in, 0);
    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 {//from  w ww  .  ja  va  2 s.  com
            // Enter the discard mode and discard everything received so far.
            discardingTooLongFrame = true;
            bytesToDiscard = discard;
            in.skipBytes(in.readableBytes());
        }
        failIfNecessary(true);
    } else {
        int readerIndex = in.readerIndex();
        int actualFrameLength = (int) frameLength;
        ByteBuf buffer = extractFrame(ctx, in, readerIndex, actualFrameLength);
        in.readerIndex(readerIndex + actualFrameLength);
        out.add(buffer);
    }
}

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From source file:com.spotify.ffwd.protobuf.ProtobufDecoder.java

License:Apache License

private void decodeOne(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    final int version = (int) in.getUnsignedInt(0);
    final long totalLength = in.getUnsignedInt(4);

    if (totalLength > MAX_FRAME_SIZE) {
        log.error("Received frame with length (" + totalLength + ") larger than maximum allowed ( "
                + MAX_FRAME_SIZE + ")");
        in.clear();/*from   w ww . j  a  va  2  s .co  m*/
        return;
    }

    // datagram underflow
    if (in.readableBytes() < totalLength) {
        log.error("Received frame of shorter length (" + in.readableBytes() + ") than reported (" + totalLength
                + ")");
        in.clear();
        return;
    }

    in.skipBytes(8);

    final Object frame;

    switch (version) {
    case 0:
        frame = decodeFrame0(in);
        break;
    default:
        throw new IllegalArgumentException("Unsupported protocol version: " + version);
    }

    if (frame != null) {
        out.add(frame);
    }
}

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From source file:com.spotify.ffwd.riemann.RiemannFrameDecoder.java

License:Apache License

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
    if (in.readableBytes() < 4) {
        return;//from  w  ww  .j av a 2s.  c o m
    }

    final long length = in.getUnsignedInt(0);

    if (length > MAX_SIZE) {
        throw new CorruptedFrameException(
                String.format("frame size (%s) larger than max (%d)", length, MAX_SIZE));
    }

    final int intLength = (int) length;

    if (in.readableBytes() < (4 + length)) {
        return;
    }

    in.skipBytes(4);
    final ByteBuf frame = in.readBytes(intLength);

    try {
        out.add(serializer.parse0(frame));
    } finally {
        frame.release();
    }
}

---

From source file:com.spotify.folsom.client.binary.BinaryMemcacheDecoder.java

License:Apache License

@Override
protected void decode(final ChannelHandlerContext ctx, final ByteBuf buf, final List<Object> out)
        throws Exception {
    for (int i = 0; i < BATCH_SIZE; i++) {
        if (buf.readableBytes() < 24) {
            return;
        }/*from   w  ww  .  jav a 2 s  .co  m*/

        buf.markReaderIndex();

        final int magicNumber = buf.readUnsignedByte(); // byte 0
        if (magicNumber != 0x81) {
            throw fail(buf, String.format("Invalid magic number: 0x%2x", magicNumber));
        }

        final int opcode = buf.readByte(); // byte 1
        final int keyLength = buf.readUnsignedShort(); // byte 2-3
        final int extrasLength = buf.readUnsignedByte(); // byte 4
        buf.skipBytes(1);
        final int statusCode = buf.readUnsignedShort(); // byte 6-7

        final MemcacheStatus status = MemcacheStatus.fromInt(statusCode);

        final int totalLength = buf.readInt(); // byte 8-11
        final int opaque = buf.readInt();

        final long cas = buf.readLong();

        if (buf.readableBytes() < totalLength) {
            buf.resetReaderIndex();
            return;
        }

        buf.skipBytes(extrasLength);

        buf.skipBytes(keyLength);

        final int valueLength = totalLength - keyLength - extrasLength;
        byte[] valueBytes;
        if (valueLength == 0) {
            valueBytes = NO_BYTES;
        } else {
            valueBytes = new byte[valueLength];
        }

        buf.readBytes(valueBytes);

        replies.add(new ResponsePacket((byte) opcode, status, opaque, cas, valueBytes));
        if ((opaque & 0xFF) == 0) {
            out.add(replies);
            replies = new BinaryResponse();
        }
    }
}

---

From source file:com.spotify.netty.handler.codec.zmtp.ZMTPMessageParser.java

License:Apache License

/**
 * Discard frames for current message.//from   ww  w .  j  a  v a2  s  .c om
 *
 * @return A truncated message if done discarding, null if not yet done.
 */
private ZMTPParsedMessage discardFrames(final ByteBuf buffer) throws ZMTPMessageParsingException {

    while (buffer.readableBytes() > 0) {
        // Parse header if necessary
        if (!headerParsed) {
            buffer.markReaderIndex();
            headerParsed = parseZMTPHeader(buffer);
            if (!headerParsed) {
                // Wait for more data to decode
                buffer.resetReaderIndex();
                return null;
            }
            size += frameSize;
            frameRemaining = frameSize;
        }

        // Discard bytes
        final int discardBytes = min(frameRemaining, buffer.readableBytes());
        frameRemaining -= discardBytes;
        buffer.skipBytes(discardBytes);

        // Check if this frame is completely discarded
        final boolean done = frameRemaining == 0;
        if (done) {
            headerParsed = false;
        }

        // Check if this message is done discarding
        if (done && !hasMore) {
            // We're done discarding
            return finish(true);
        }
    }

    return null;
}

---

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

License:Apache License

private static CharSequence readMethod(final ByteBuf data, final int size) {
    for (final AsciiString method : METHODS) {
        if (asciiEquals(method, data, size)) {
            data.skipBytes(size);
            return method;
        }/*from ww w .j  a va2s .c o m*/
    }
    return readAscii(data, size);
}

---

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTP10WireFormat.java

License:Apache License

/**
 * Read the remote identity octets from a ZMTP/1.0 greeting.
 *//*from  w ww  . ja v a 2 s.  c om*/
static ByteBuffer readIdentity(final ByteBuf buffer) throws ZMTPParsingException {
    final long length = readLength(buffer);
    if (length == -1) {
        return null;
    }
    final long identityLength = length - 1;
    if (identityLength < 0 || identityLength > 255) {
        throw new ZMTPParsingException("Bad remote identity length: " + length);
    }

    // skip the flags byte
    buffer.skipBytes(1);

    final byte[] identity = new byte[(int) identityLength];
    buffer.readBytes(identity);
    return ByteBuffer.wrap(identity);
}

---

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTP20WireFormat.java

License:Apache License

/**
 * Read a ZMTP/2.0 greeting./*from  w  w w.ja v a2s . c  o  m*/
 *
 * @param in The buffer to read the greeting from.
 * @return A {@link com.spotify.netty4.handler.codec.zmtp.ZMTP20WireFormat.Greeting}.
 * @throws ZMTPParsingException      If the greeting is malformed.
 * @throws IndexOutOfBoundsException If there is not enough readable bytes to read an entire
 *                                   greeting.
 */
static Greeting readGreeting(ByteBuf in) throws ZMTPParsingException {
    if (in.readByte() != (byte) 0xff) {
        throw new ZMTPParsingException("Illegal ZMTP/2.0 greeting, first octet not 0xff");
    }
    in.skipBytes(9);
    return readGreetingBody(in);
}

---

From source file:com.spotify.netty4.handler.codec.zmtp.ZMTP20WireFormat.java

License:Apache License

/**
 * Read enough bytes from buffer to deduce the remote protocol version in a backwards compatible
 * ZMTP handshake.// w w  w . j a  v a  2 s .c  o  m
 *
 * @param in the buffer of data to determine version from.
 * @return The detected {@link ZMTPVersion}.
 * @throws IndexOutOfBoundsException if there is not enough data available in buffer.
 */
static ZMTPVersion detectProtocolVersion(final ByteBuf in) {
    if (in.readByte() != (byte) 0xff) {
        return ZMTPVersion.ZMTP10;
    }
    in.skipBytes(8);
    if ((in.readByte() & 0x01) == 0) {
        return ZMTPVersion.ZMTP10;
    }
    return ZMTPVersion.ZMTP20;
}

---

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

License:Apache License

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

    // Discard input if handshake failed. It is expected that the user will close the channel.
    if (session.handshakeFuture().isDone()) {
        assert !session.handshakeFuture().isSuccess();
        in.skipBytes(in.readableBytes());
    }//  w ww. j  ava2s.c om

    // Shake hands
    final ZMTPHandshake handshake;
    try {
        handshake = handshaker.handshake(in, ctx);
        if (handshake == null) {
            // Handshake is not yet done. Await more input.
            return;
        }
    } catch (Exception e) {
        session.handshakeFailure(e);
        ctx.fireUserEventTriggered(new ZMTPHandshakeFailure(session));
        throw e;
    }

    // Handshake is done.
    session.handshakeSuccess(handshake);

    // Replace this handler with the framing encoder and decoder
    if (actualReadableBytes() > 0) {
        out.add(in.readBytes(actualReadableBytes()));
    }
    final ZMTPDecoder decoder = config.decoder().decoder(session);
    final ZMTPEncoder encoder = config.encoder().encoder(session);
    final ZMTPWireFormat wireFormat = ZMTPWireFormats.wireFormat(session.negotiatedVersion());
    final ChannelHandler handler = new CombinedChannelDuplexHandler<ZMTPFramingDecoder, ZMTPFramingEncoder>(
            new ZMTPFramingDecoder(wireFormat, decoder), new ZMTPFramingEncoder(wireFormat, encoder));
    ctx.pipeline().replace(this, ctx.name(), handler);

    // Tell the user that the handshake is complete
    ctx.fireUserEventTriggered(new ZMTPHandshakeSuccess(session, handshake));
}

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