Example usage for io.netty.buffer ByteBuf hasArray

List of usage examples for io.netty.buffer ByteBuf hasArray

Introduction

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

Prototype

public abstract boolean hasArray();

Source Link

Document

Returns true if and only if this buffer has a backing byte array.

Usage

From source file:dorkbox.network.connection.KryoExtra.java

License:Apache License

public synchronized void writeCrypto(final Connection_ connection, final ByteBuf buffer, final Object message)
        throws IOException {
    // required by RMI and some serializers to determine which connection wrote (or has info about) this object
    this.rmiSupport = connection.rmiSupport();

    ByteBuf objectOutputBuffer = this.tempBuffer;
    objectOutputBuffer.clear(); // always have to reset everything

    // write the object to a TEMP buffer! this will be compressed
    writer.setBuffer(objectOutputBuffer);

    writeClassAndObject(writer, message);

    // save off how much data the object took
    int length = objectOutputBuffer.writerIndex();

    // NOTE: compression and encryption MUST work with byte[] because they use JNI!
    // Realistically, it is impossible to get the backing arrays out of a Heap Buffer once they are resized and begin to use
    // sliced. It's lame that there is a "double copy" of bytes here, but I don't know how to avoid it...
    // see:   https://stackoverflow.com/questions/19296386/netty-java-getting-data-from-bytebuf

    byte[] inputArray;
    int inputOffset;

    // Even if a ByteBuf has a backing array (i.e. buf.hasArray() returns true), the using it isn't always possible because
    // the buffer might be a slice of other buffer or a pooled buffer:
    //noinspection Duplicates
    if (objectOutputBuffer.hasArray() && objectOutputBuffer.array()[0] == objectOutputBuffer.getByte(0)
            && objectOutputBuffer.array().length == objectOutputBuffer.capacity()) {

        // we can use it...
        inputArray = objectOutputBuffer.array();
        inputArrayLength = -1; // this is so we don't REUSE this array accidentally!
        inputOffset = objectOutputBuffer.arrayOffset();
    } else {//from ww w .java2  s  .co m
        // we can NOT use it.
        if (length > inputArrayLength) {
            inputArrayLength = length;
            inputArray = new byte[length];
            this.inputArray = inputArray;
        } else {
            inputArray = this.inputArray;
        }

        objectOutputBuffer.getBytes(objectOutputBuffer.readerIndex(), inputArray, 0, length);
        inputOffset = 0;
    }

    ////////// compressing data
    // we ALWAYS compress our data stream -- because of how AES-GCM pads data out, the small input (that would result in a larger
    // output), will be negated by the increase in size by the encryption

    byte[] compressOutput = this.compressOutput;

    int maxLengthLengthOffset = 4; // length is never negative, so 4 is OK (5 means it's negative)
    int maxCompressedLength = compressor.maxCompressedLength(length);

    // add 4 so there is room to write the compressed size to the buffer
    int maxCompressedLengthWithOffset = maxCompressedLength + maxLengthLengthOffset;

    // lazy initialize the compression output buffer
    if (maxCompressedLengthWithOffset > compressOutputLength) {
        compressOutputLength = maxCompressedLengthWithOffset;
        compressOutput = new byte[maxCompressedLengthWithOffset];
        this.compressOutput = compressOutput;
    }

    // LZ4 compress. output offset max 4 bytes to leave room for length of tempOutput data
    int compressedLength = compressor.compress(inputArray, inputOffset, length, compressOutput,
            maxLengthLengthOffset, maxCompressedLength);

    // bytes can now be written to, because our compressed data is stored in a temp array.

    final int lengthLength = OptimizeUtilsByteArray.intLength(length, true);

    // correct input.  compression output is now encryption input
    inputArray = compressOutput;
    inputOffset = maxLengthLengthOffset - lengthLength;

    // now write the ORIGINAL (uncompressed) length to the front of the byte array. This is so we can use the FAST decompress version
    OptimizeUtilsByteArray.writeInt(inputArray, length, true, inputOffset);

    // correct length for encryption
    length = compressedLength + lengthLength; // +1 to +4 for the uncompressed size bytes

    /////// encrypting data.
    final long nextGcmSequence = connection.getNextGcmSequence();

    // this is a threadlocal, so that we don't clobber other threads that are performing crypto on the same connection at the same time
    final ParametersWithIV cryptoParameters = connection.getCryptoParameters();
    BigEndian.Long_.toBytes(nextGcmSequence, cryptoParameters.getIV(), 4); // put our counter into the IV

    final GCMBlockCipher aes = this.aesEngine;
    aes.reset();
    aes.init(true, cryptoParameters);

    byte[] cryptoOutput;

    // lazy initialize the crypto output buffer
    int cryptoSize = length + 16; // from:  aes.getOutputSize(length);

    // 'output' is the temp byte array
    if (cryptoSize > cryptoOutputLength) {
        cryptoOutputLength = cryptoSize;
        cryptoOutput = new byte[cryptoSize];
        this.cryptoOutput = cryptoOutput;
    } else {
        cryptoOutput = this.cryptoOutput;
    }

    int encryptedLength = aes.processBytes(inputArray, inputOffset, length, cryptoOutput, 0);

    try {
        // authentication tag for GCM
        encryptedLength += aes.doFinal(cryptoOutput, encryptedLength);
    } catch (Exception e) {
        throw new IOException("Unable to AES encrypt the data", e);
    }

    // write out our GCM counter
    OptimizeUtilsByteBuf.writeLong(buffer, nextGcmSequence, true);

    // have to copy over the orig data, because we used the temp buffer
    buffer.writeBytes(cryptoOutput, 0, encryptedLength);
}

From source file:dorkbox.network.connection.KryoExtra.java

License:Apache License

public Object readCrypto(final Connection_ connection, final ByteBuf buffer, int length) throws IOException {
    // required by RMI and some serializers to determine which connection wrote (or has info about) this object
    this.rmiSupport = connection.rmiSupport();

    ////////////////
    // Note: we CANNOT write BACK to the buffer as "temp" storage, since there could be additional data on it!
    ////////////////

    ByteBuf inputBuf = buffer;

    final long gcmIVCounter = OptimizeUtilsByteBuf.readLong(buffer, true);
    int lengthLength = OptimizeUtilsByteArray.longLength(gcmIVCounter, true);

    // have to adjust for the gcmIVCounter
    length = length - lengthLength;/*from   w ww .j  a v  a 2  s .  co  m*/

    /////////// decrypting data

    // NOTE: compression and encryption MUST work with byte[] because they use JNI!
    // Realistically, it is impossible to get the backing arrays out of a Heap Buffer once they are resized and begin to use
    // sliced. It's lame that there is a "double copy" of bytes here, but I don't know how to avoid it...
    // see:   https://stackoverflow.com/questions/19296386/netty-java-getting-data-from-bytebuf

    byte[] inputArray;
    int inputOffset;

    // Even if a ByteBuf has a backing array (i.e. buf.hasArray() returns true), the using it isn't always possible because
    // the buffer might be a slice of other buffer or a pooled buffer:
    //noinspection Duplicates
    if (inputBuf.hasArray() && inputBuf.array()[0] == inputBuf.getByte(0)
            && inputBuf.array().length == inputBuf.capacity()) {

        // we can use it...
        inputArray = inputBuf.array();
        inputArrayLength = -1; // this is so we don't REUSE this array accidentally!
        inputOffset = inputBuf.arrayOffset() + lengthLength;
    } else {
        // we can NOT use it.
        if (length > inputArrayLength) {
            inputArrayLength = length;
            inputArray = new byte[length];
            this.inputArray = inputArray;
        } else {
            inputArray = this.inputArray;
        }

        inputBuf.getBytes(inputBuf.readerIndex(), inputArray, 0, length);
        inputOffset = 0;
    }

    // have to make sure to set the position of the buffer, since our conversion to array DOES NOT set the new reader index.
    buffer.readerIndex(buffer.readerIndex() + length);

    // this is a threadlocal, so that we don't clobber other threads that are performing crypto on the same connection at the same time
    final ParametersWithIV cryptoParameters = connection.getCryptoParameters();
    BigEndian.Long_.toBytes(gcmIVCounter, cryptoParameters.getIV(), 4); // put our counter into the IV

    final GCMBlockCipher aes = this.aesEngine;
    aes.reset();
    aes.init(false, cryptoParameters);

    int cryptoSize = length - 16; // from:  aes.getOutputSize(length);

    // lazy initialize the decrypt output buffer
    byte[] decryptOutputArray;
    if (cryptoSize > decryptOutputLength) {
        decryptOutputLength = cryptoSize;
        decryptOutputArray = new byte[cryptoSize];
        this.decryptOutput = decryptOutputArray;

        decryptBuf = Unpooled.wrappedBuffer(decryptOutputArray);
    } else {
        decryptOutputArray = this.decryptOutput;
    }

    int decryptedLength = aes.processBytes(inputArray, inputOffset, length, decryptOutputArray, 0);

    try {
        // authentication tag for GCM
        decryptedLength += aes.doFinal(decryptOutputArray, decryptedLength);
    } catch (Exception e) {
        throw new IOException("Unable to AES decrypt the data", e);
    }

    ///////// decompress data -- as it's ALWAYS compressed

    // get the decompressed length (at the beginning of the array)
    inputArray = decryptOutputArray;
    final int uncompressedLength = OptimizeUtilsByteArray.readInt(inputArray, true);
    inputOffset = OptimizeUtilsByteArray.intLength(uncompressedLength, true); // because 1-4 bytes for the decompressed size

    byte[] decompressOutputArray = this.decompressOutput;
    if (uncompressedLength > decompressOutputLength) {
        decompressOutputLength = uncompressedLength;
        decompressOutputArray = new byte[uncompressedLength];
        this.decompressOutput = decompressOutputArray;

        decompressBuf = Unpooled.wrappedBuffer(decompressOutputArray); // so we can read via kryo
    }
    inputBuf = decompressBuf;

    // LZ4 decompress, requires the size of the ORIGINAL length (because we use the FAST decompressor
    decompressor.decompress(inputArray, inputOffset, decompressOutputArray, 0, uncompressedLength);

    inputBuf.setIndex(0, uncompressedLength);

    // read the object from the buffer.
    reader.setBuffer(inputBuf);

    return readClassAndObject(reader); // this properly sets the readerIndex, but only if it's the correct buffer
}

From source file:io.atomix.cluster.messaging.impl.MessageDecoder.java

License:Apache License

static String readString(ByteBuf buffer, int length, Charset charset) {
    if (buffer.isDirect()) {
        final String result = buffer.toString(buffer.readerIndex(), length, charset);
        buffer.skipBytes(length);/*from  w w w. j  av a  2 s . c  o m*/
        return result;
    } else if (buffer.hasArray()) {
        final String result = new String(buffer.array(), buffer.arrayOffset() + buffer.readerIndex(), length,
                charset);
        buffer.skipBytes(length);
        return result;
    } else {
        final byte[] array = new byte[length];
        buffer.readBytes(array);
        return new String(array, charset);
    }
}

From source file:io.datty.aerospike.support.AerospikeValueUtil.java

License:Apache License

public static Value toValue(ByteBuf bufferOrNull) {

    if (bufferOrNull == null) {
        return new NullValue();
    } else if (bufferOrNull.hasArray()) {
        int start = bufferOrNull.readerIndex();
        int length = bufferOrNull.readableBytes();
        if (start != 0 || length != bufferOrNull.capacity()) {
            int baseOffset = bufferOrNull.arrayOffset() + start;
            return new ByteSegmentValue(bufferOrNull.array(), baseOffset, baseOffset + length);
        } else {/*  w  ww.j  a v  a  2 s.  c om*/
            return new BytesValue(bufferOrNull.array());
        }
    } else {
        byte[] bytes = new byte[bufferOrNull.readableBytes()];
        bufferOrNull.getBytes(bufferOrNull.readerIndex(), bytes);
        return new BytesValue(bytes);
    }

}

From source file:io.datty.msgpack.core.AbstractMessageReader.java

License:Apache License

public String readString(ByteBuf buffer, int length, Charset charset) {
    if (length > buffer.readableBytes()) {
        throw new MessageParseException(
                "insufficient buffer length: " + buffer.readableBytes() + ", required length: " + length);
    }/* w w w .  ja v a2  s  . co m*/
    if (buffer.hasArray()) {
        int start = buffer.readerIndex();
        int baseOffset = buffer.arrayOffset() + start;
        String str = new String(buffer.array(), baseOffset, length, charset);
        buffer.readerIndex(start + length);
        return str;
    } else {
        byte[] bytes = new byte[length];
        buffer.readBytes(bytes);
        return new String(bytes, charset);
    }
}

From source file:io.gatling.netty.util.ahc.ByteBufUtils.java

License:Apache License

public static byte[] byteBuf2Bytes(ByteBuf buf) {
    int readable = buf.readableBytes();
    int readerIndex = buf.readerIndex();
    if (buf.hasArray()) {
        byte[] array = buf.array();
        if (buf.arrayOffset() == 0 && readerIndex == 0 && array.length == readable) {
            return array;
        }/*from   w  w  w  . ja  v  a2  s .co m*/
    }
    byte[] array = new byte[readable];
    buf.getBytes(readerIndex, array);
    return array;
}

From source file:io.gatling.netty.util.ahc.Utf8ByteBufCharsetDecoder.java

License:Apache License

private void inspectByteBufs(ByteBuf[] bufs) {
    for (ByteBuf buf : bufs) {
        if (!buf.hasArray()) {
            withoutArray = true;/*from w  w w  .  j  a  va2 s .  c  om*/
            break;
        }
        totalSize += buf.readableBytes();
        totalNioBuffers += buf.nioBufferCount();
    }
}

From source file:io.nebo.thrift.TNiftyTransport.java

License:Apache License

public TNiftyTransport(Channel channel, ByteBuf in, ThriftTransportType thriftTransportType) {
    this.channel = channel;
    this.in = in;
    this.out = Unpooled.buffer(DEFAULT_OUTPUT_BUFFER_SIZE);
    this.thriftTransportType = thriftTransportType;
    this.initialReaderIndex = in.readerIndex();

    if (!in.hasArray()) {
        buffer = null;//from   w w  w  . j  a  va 2  s  .  c o  m
        bufferPosition = 0;
        initialBufferPosition = bufferEnd = -1;
    } else {
        buffer = in.array();
        initialBufferPosition = bufferPosition = in.arrayOffset() + in.readerIndex();
        bufferEnd = bufferPosition + in.readableBytes();
        // Without this, reading from a !in.hasArray() buffer will advance the readerIndex
        // of the buffer, while reading from a in.hasArray() buffer will not advance the
        // readerIndex, and this has led to subtle bugs. This should help to identify
        // those problems by making things more consistent.
        in.readerIndex(in.readerIndex() + in.readableBytes());
    }
}

From source file:io.servicecomb.foundation.vertx.TestVertxUtils.java

License:Apache License

@Test
public void testgetBytesFastByteBufCopy() {
    ByteBuf byteBuf = Unpooled.directBuffer();
    byteBuf.writeByte(1);/*from www .  j av a 2 s.  c  o m*/
    Assert.assertFalse(byteBuf.hasArray());

    byte[] result = VertxUtils.getBytesFast(byteBuf);
    Assert.assertEquals(1, result[0]);

    byteBuf.release();
}

From source file:io.servicecomb.foundation.vertx.VertxUtils.java

License:Apache License

public static byte[] getBytesFast(ByteBuf byteBuf) {
    if (byteBuf.hasArray()) {
        return byteBuf.array();
    }//w  ww . java2s  .co m

    byte[] arr = new byte[byteBuf.writerIndex()];
    byteBuf.getBytes(0, arr);
    return arr;
}