io.netty.buffer.ByteBuf.readerIndex()方法的使用及代码示例

x33g5p2x  于2022-01-16 转载在 其他  
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本文整理了Java中io.netty.buffer.ByteBuf.readerIndex()方法的一些代码示例，展示了ByteBuf.readerIndex()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。ByteBuf.readerIndex()方法的具体详情如下：
包路径：io.netty.buffer.ByteBuf
类名称：ByteBuf
方法名：readerIndex

ByteBuf.readerIndex介绍

[英]Returns the readerIndex of this buffer.
[中]返回此缓冲区的readerIndex。

代码示例

代码示例来源：origin: netty/netty

@Override
public long skip(long bytes) throws IOException {
  int readable = buffer.readableBytes();
  if (readable < bytes) {
    bytes = readable;
  }
  buffer.readerIndex((int) (buffer.readerIndex() + bytes));
  return bytes;
}

代码示例来源：origin: wildfly/wildfly

/**
 * Returns the closing status code as per <a href="http://tools.ietf.org/html/rfc6455#section-7.4">RFC 6455</a>. If
 * a getStatus code is set, -1 is returned.
 */
public int statusCode() {
  ByteBuf binaryData = content();
  if (binaryData == null || binaryData.capacity() == 0) {
    return -1;
  }
  binaryData.readerIndex(0);
  int statusCode = binaryData.readShort();
  binaryData.readerIndex(0);
  return statusCode;
}

代码示例来源：origin: redisson/redisson

@Override
  public Object decode(ByteBuf buf, State state) throws IOException {
    int decompressSize = buf.readInt();
    ByteBuf out = ByteBufAllocator.DEFAULT.buffer(decompressSize);
    try {
      LZ4SafeDecompressor decompressor = factory.safeDecompressor();
      ByteBuffer outBuffer = out.internalNioBuffer(out.writerIndex(), out.writableBytes());
      int pos = outBuffer.position();
      decompressor.decompress(buf.internalNioBuffer(buf.readerIndex(), buf.readableBytes()), outBuffer);
      int compressedLength = outBuffer.position() - pos;
      out.writerIndex(compressedLength);
      return innerCodec.getValueDecoder().decode(out, state);
    } finally {
      out.release();
    }
  }
};

代码示例来源：origin: org.opendaylight.openflowjava/simple-client

@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
  ByteBuf bb = (ByteBuf) msg;
  if (LOG.isDebugEnabled()) {
    LOG.debug("<< {}", ByteBufUtils.byteBufToHexString(bb));
  }
  int length = bb.getUnsignedShort(bb.readerIndex() + LENGTH_INDEX_IN_HEADER);
  LOG.trace("SimpleClientHandler - start of read");
  byte[] message = new byte[length];
  bb.readBytes(message);
  scenarioHandler.addOfMsg(message);
  LOG.trace("end of read");
}

代码示例来源：origin: org.opendaylight.netconf/netconf-netty-util

@Override
public void decode(final ChannelHandlerContext ctx, final ByteBuf in, final List<Object> out) throws IOException, SAXException {
  if (in.isReadable()) {
    if (LOG.isTraceEnabled()) {
      LOG.trace("Received to decode: {}", ByteBufUtil.hexDump(in));
      if (!isWhitespace(in.readByte())) {
        in.readerIndex(in.readerIndex() - 1);
        break;
    if (in.readerIndex() != 0 && LOG.isWarnEnabled()) {
      final byte[] strippedBytes = new byte[in.readerIndex()];
      in.getBytes(0, strippedBytes, 0, in.readerIndex());
      LOG.warn("XML message with unwanted leading bytes detected. Discarded the {} leading byte(s): '{}'",
          in.readerIndex(), ByteBufUtil.hexDump(Unpooled.wrappedBuffer(strippedBytes)));

代码示例来源：origin: apache/drill

public void decode(ChannelHandlerContext ctx, ByteBuf msg, List<Object> out) throws IOException {
  logger.trace("Channel closed before decoding the message of {} bytes", msg.readableBytes());
  msg.skipBytes(msg.readableBytes());
  return;
  if(logger.isTraceEnabled()) {
   logger.trace("Trying to decrypt the encrypted message of size: {} with maxWrappedSize", msg.readableBytes());
  msg.getBytes(msg.readerIndex(), lengthOctets.array(), 0, RpcConstants.LENGTH_FIELD_LENGTH);
  final int wrappedMsgLength = lengthOctets.getInt(0);
  msg.skipBytes(RpcConstants.LENGTH_FIELD_LENGTH);
  msg.getBytes(msg.readerIndex(), wrappedMsg, 0, wrappedMsgLength);
  if(logger.isTraceEnabled()) {
   logger.trace("Successfully decrypted incoming message. Length after decryption: {}", decodedMsg.length);

代码示例来源：origin: Graylog2/graylog2-server

LOG.trace("Attempting to decode DNS record [{}]", dnsRecord);
try {
  final ByteBuf byteBuf = dnsRawRecord.content();
  ipAddressBytes = new byte[byteBuf.readableBytes()];
  int readerIndex = byteBuf.readerIndex();
  byteBuf.getBytes(readerIndex, ipAddressBytes);
} finally {
LOG.trace("The IP address has [{}] bytes", ipAddressBytes.length);
LOG.trace("The resulting IP address is [{}]", ipAddress.getHostAddress());

代码示例来源：origin: apache/hive

@Override
protected void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out)
  throws Exception {
 if (in.readableBytes() < 4) {
  return;
 }
 in.markReaderIndex();
 int msgSize = in.readInt();
 checkSize(msgSize);
 if (in.readableBytes() < msgSize) {
  // Incomplete message in buffer.
  in.resetReaderIndex();
  return;
 }
 try {
  ByteBuffer nioBuffer = maybeDecrypt(in.nioBuffer(in.readerIndex(), msgSize));
  Input kryoIn = new Input(new ByteBufferInputStream(nioBuffer));
  Object msg = kryos.get().readClassAndObject(kryoIn);
  LOG.trace("Decoded message of type {} ({} bytes)",
    msg != null ? msg.getClass().getName() : msg, msgSize);
  out.add(msg);
 } finally {
  in.skipBytes(msgSize);
 }
}

代码示例来源：origin: qunarcorp/qmq

@Override
protected void decode(ChannelHandlerContext channelHandlerContext, ByteBuf in, List<Object> list) throws Exception {
  if (in.readableBytes() < RemotingHeader.MIN_HEADER_SIZE + RemotingHeader.LENGTH_FIELD) return;
  int magicCode = in.getInt(in.readerIndex() + RemotingHeader.LENGTH_FIELD);
  if (DEFAULT_MAGIC_CODE != magicCode) {
    throw new IOException("Illegal Data, MagicCode=" + Integer.toHexString(magicCode));
  int total = in.readInt();
  if (in.readableBytes() < total) {
    in.resetReaderIndex();
    return;
  short headerSize = in.readShort();
  RemotingHeader remotingHeader = decodeHeader(in);

代码示例来源：origin: alibaba/fescar

@Override
public boolean decode(ByteBuf in) {
  int i = in.readableBytes();
  try {
    short len = in.readShort();
    if (len > 0) {
      byte[] bs = new byte[len];
      this.setVersion(new String(bs, UTF8));
    len = in.readShort();
    if (len > 0) {
      byte[] bs = new byte[len];
      this.setApplicationId(new String(bs, UTF8));
    len = in.readShort();
    if (len > 0) {
      byte[] bs = new byte[len];
    LOGGER.debug(in.writerIndex() == in.readerIndex() ? "true" : "false" + this);

代码示例来源：origin: traccar/traccar

int idLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x00) - buf.readerIndex();
String id = buf.readBytes(idLength).toString(StandardCharsets.US_ASCII);
buf.readByte();
  int blockEnd = buf.readInt() + buf.readerIndex();
  int nameLength = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x00) - buf.readerIndex();
  String name = buf.readBytes(nameLength).toString(StandardCharsets.US_ASCII);
  buf.readByte();
    position.setLatitude(buf.readDoubleLE());
    position.setAltitude(buf.readDoubleLE());
    position.setSpeed(buf.readShort());
    position.setCourse(buf.readShort());
    position.set(Position.KEY_SATELLITES, buf.readByte());
  } else {
    switch (dataType) {
      case 1:
        int len = buf.indexOf(buf.readerIndex(), buf.writerIndex(), (byte) 0x00) - buf.readerIndex();
        position.set(name, buf.readBytes(len).toString(StandardCharsets.US_ASCII));
        buf.readByte();
        break;
      case 3:
        position.set(name, buf.readInt());
        break;
      case 4:
  buf.readerIndex(blockEnd);

代码示例来源：origin: waterguo/antsdb

int pos = in.readerIndex();
int size = BufferUtils.readLongInt(in);
int sequence = in.readByte() & 0xff;
if (!in.isReadable(size)) {
  in.readerIndex(pos);
  return;
packet.retain();
try {
  in.readerIndex(pos + size + 4);
  _log.trace("packet {}", ByteBufUtil.dump(packet));
  out.add(packet);

代码示例来源：origin: org.opendaylight.controller/netconf-netty-util

@Override
public void decode(final ChannelHandlerContext ctx, final ByteBuf in, final List<Object> out) throws IOException, SAXException {
  if (in.isReadable()) {
    if (LOG.isTraceEnabled()) {
      LOG.trace("Received to decode: {}", ByteBufUtil.hexDump(in));
      if (!isWhitespace(in.readByte())) {
        in.readerIndex(in.readerIndex() - 1);
        break;
    if (in.readerIndex() != 0 && LOG.isWarnEnabled()) {
      final byte[] strippedBytes = new byte[in.readerIndex()];
      in.getBytes(0, strippedBytes, 0, in.readerIndex());
      LOG.warn("XML message with unwanted leading bytes detected. Discarded the {} leading byte(s): '{}'",
          in.readerIndex(), ByteBufUtil.hexDump(Unpooled.wrappedBuffer(strippedBytes)));

代码示例来源：origin: apache/drill

if (component.readableBytes() > wrapSizeLimit) {
 throw new RpcException(String.format("Component Chunk size: %d is greater than the wrapSizeLimit: %d",
   component.readableBytes(), wrapSizeLimit));
component.getBytes(component.readerIndex(), origMsg, 0, component.readableBytes());
if(logger.isTraceEnabled()) {
 logger.trace("Trying to encrypt chunk of size:{} with wrapSizeLimit:{} and chunkMode: {}",
   component.readableBytes(), wrapSizeLimit);
final byte[] wrappedMsg = saslCodec.wrap(origMsg, 0, component.readableBytes());
if(logger.isTraceEnabled()) {
 logger.trace("Successfully encrypted message, original size: {} Final Size: {}",
   component.readableBytes(), wrappedMsg.length);

代码示例来源：origin: whizzosoftware/WZWave

cbuf.addComponent(previousBuf.copy());
  cbuf.addComponent(in);
  cbuf.writerIndex(previousBuf.readableBytes() + in.readableBytes());
  data = cbuf;
  if (data.readableBytes() == 1 && isSingleByteFrame(data, data.readerIndex())) {
    out.add(createSingleByteFrame(data));
  } else {
    boolean foundFrame = false;
    for (int searchStartIx = data.readerIndex(); searchStartIx < data.readerIndex() + data.readableBytes(); searchStartIx++) {
      if (data.getByte(searchStartIx) == DataFrame.START_OF_FRAME) {
        int frameEndIx = scanForFrame(data, searchStartIx);
        if (frameEndIx > 0) {
          if (searchStartIx > data.readerIndex() && isSingleByteFrame(data, searchStartIx - 1)) {
            data.readerIndex(searchStartIx - 1);
            out.add(createSingleByteFrame(data));
          } else if (searchStartIx > data.readerIndex()) {
            data.readerIndex(searchStartIx);
in.readBytes(in.readableBytes());
logger.trace("Done processing received data: {}", out);

代码示例来源：origin: netty/netty

@Override
public int readableBytes() {
  if (terminated) {
    return buffer.readableBytes();
  } else {
    return Integer.MAX_VALUE - buffer.readerIndex();
  }
}

代码示例来源：origin: redisson/redisson

@Override
  public Object decode(ByteBuf buf, State state) throws IOException {
    int decompressSize = buf.readInt();
    ByteBuf out = ByteBufAllocator.DEFAULT.buffer(decompressSize);
    try {
      LZ4SafeDecompressor decompressor = factory.safeDecompressor();
      ByteBuffer outBuffer = out.internalNioBuffer(out.writerIndex(), out.writableBytes());
      int pos = outBuffer.position();
      decompressor.decompress(buf.internalNioBuffer(buf.readerIndex(), buf.readableBytes()), outBuffer);
      int compressedLength = outBuffer.position() - pos;
      out.writerIndex(compressedLength);
      return innerCodec.getValueDecoder().decode(out, state);
    } finally {
      out.release();
    }
  }
};

代码示例来源：origin: alipay/sofa-bolt

public void decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) throws Exception {
  if (in.readableBytes() >= lessLen) {
    in.markReaderIndex();
    byte protocol = in.readByte();
      if (in.readableBytes() > 2 + 1) {
        int startIndex = in.readerIndex();
        in.markReaderIndex();
        if (type == RpcCommandType.REQUEST || type == RpcCommandType.REQUEST_ONEWAY) {
          if (in.readableBytes() >= RpcProtocolV2.getRequestHeaderLength() - 3) {
            short cmdCode = in.readShort();
            byte ver2 = in.readByte();
            int requestId = in.readInt();
            byte serializer = in.readByte();
            byte protocolSwitchValue = in.readByte();
            int timeout = in.readInt();
            short classLen = in.readShort();
            short headerLen = in.readShort();
            int contentLen = in.readInt();
            byte[] clazz = null;
            byte[] header = null;

代码示例来源：origin: wildfly/wildfly

return;
if (buffer.readableBytes() == 1) {
  protocolViolation(ctx, "Invalid close frame body");
int idx = buffer.readerIndex();
buffer.readerIndex(0);
int statusCode = buffer.readShort();
if (statusCode >= 0 && statusCode <= 999 || statusCode >= 1004 && statusCode <= 1006
    || statusCode >= 1012 && statusCode <= 2999) {
buffer.readerIndex(idx);

代码示例来源：origin: traccar/traccar

format = formats.get(buf.getUnsignedByte(buf.readerIndex()));
} else if (!formats.isEmpty()) {
  format = formats.values().iterator().next();
      break;
    case 0x07:
      position.setLatitude(buf.readInt() * 0.000001);
      break;
    case 0x08:
      position.setLongitude(buf.readInt() * 0.000001);
      break;
    case 0x09:
      position.setAltitude(buf.readShort() * 0.1);
      break;
    case 0x0a:
      position.setCourse(buf.readShort() * 0.1);
      break;
    case 0x0b:
      break;
    case 0x14:
      position.set(Position.KEY_RSSI, buf.readShort());
      break;
    case 0x16:

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