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:io.grpc.alts.internal.BufUnwrapperTest.java

License:Apache License

@Test
public void writableNioBuffers_indexesPreserved() {
    ByteBuf buf = alloc.buffer(1);
    int ridx = buf.readerIndex();
    int widx = buf.writerIndex();
    int cap = buf.capacity();
    try (BufUnwrapper unwrapper = new BufUnwrapper()) {
        ByteBuffer[] internalBufs = unwrapper.writableNioBuffers(buf);
        Truth.assertThat(internalBufs).hasLength(1);

        internalBufs[0].put((byte) 'a');

        assertEquals(ridx, buf.readerIndex());
        assertEquals(widx, buf.writerIndex());
        assertEquals(cap, buf.capacity());
    } finally {//from w w  w .  j  a va 2s  .  co m
        buf.release();
    }
}

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From source file:io.grpc.alts.internal.ChannelCrypterNettyTestBase.java

License:Apache License

FrameDecrypt frameDecryptOfEncrypt(FrameEncrypt frameEncrypt) {
    int tagLen = client.getSuffixLength();
    FrameDecrypt frameDecrypt = new FrameDecrypt();
    ByteBuf out = frameEncrypt.out;
    frameDecrypt.ciphertext = Collections
            .singletonList(out.slice(out.readerIndex(), out.readableBytes() - tagLen));
    frameDecrypt.tag = out.slice(out.readerIndex() + out.readableBytes() - tagLen, tagLen);
    frameDecrypt.out = getDirectBuffer(out.readableBytes(), ref);
    return frameDecrypt;
}

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From source file:io.grpc.alts.internal.ChannelCrypterNettyTestBase.java

License:Apache License

@Test
public void encryptDecryptComposite() throws GeneralSecurityException {
    String message = "Hello world";
    int lastLen = 2;
    byte[] messageBytes = message.getBytes(UTF_8);
    FrameEncrypt frameEncrypt = new FrameEncrypt();
    ByteBuf plain1 = getDirectBuffer(messageBytes.length - lastLen, ref);
    ByteBuf plain2 = getDirectBuffer(lastLen, ref);
    plain1.writeBytes(messageBytes, 0, messageBytes.length - lastLen);
    plain2.writeBytes(messageBytes, messageBytes.length - lastLen, lastLen);
    ByteBuf plain = Unpooled.wrappedBuffer(plain1, plain2);
    frameEncrypt.plain = Collections.singletonList(plain);
    frameEncrypt.out = getDirectBuffer(messageBytes.length + client.getSuffixLength(), ref);

    client.encrypt(frameEncrypt.out, frameEncrypt.plain);

    int tagLen = client.getSuffixLength();
    FrameDecrypt frameDecrypt = new FrameDecrypt();
    ByteBuf out = frameEncrypt.out;
    int outLen = out.readableBytes();
    ByteBuf cipher1 = getDirectBuffer(outLen - lastLen - tagLen, ref);
    ByteBuf cipher2 = getDirectBuffer(lastLen, ref);
    cipher1.writeBytes(out, 0, outLen - lastLen - tagLen);
    cipher2.writeBytes(out, outLen - tagLen - lastLen, lastLen);
    ByteBuf cipher = Unpooled.wrappedBuffer(cipher1, cipher2);
    frameDecrypt.ciphertext = Collections.singletonList(cipher);
    frameDecrypt.tag = out.slice(out.readerIndex() + out.readableBytes() - tagLen, tagLen);
    frameDecrypt.out = getDirectBuffer(out.readableBytes(), ref);

    server.decrypt(frameDecrypt.out, frameDecrypt.tag, frameDecrypt.ciphertext);
    assertThat(frameEncrypt.plain.get(0).slice(0, frameDecrypt.out.readableBytes()))
            .isEqualTo(frameDecrypt.out);
}

---

From source file:io.grpc.netty.GrpcHpackDecoder.java

License:Apache License

/**
 * Unsigned Little Endian Base 128 Variable-Length Integer Encoding
 * <p>/* w w w.  j a  v  a2  s  .co  m*/
 * Visible for testing only!
 */
static int decodeULE128(ByteBuf in, int result) throws Http2Exception {
    final int readerIndex = in.readerIndex();
    final long v = decodeULE128(in, (long) result);
    if (v > Integer.MAX_VALUE) {
        // the maximum value that can be represented by a signed 32 bit number is:
        // [0x1,0x7f] + 0x7f + (0x7f << 7) + (0x7f << 14) + (0x7f << 21) + (0x6 << 28)
        // OR
        // 0x0 + 0x7f + (0x7f << 7) + (0x7f << 14) + (0x7f << 21) + (0x7 << 28)
        // we should reset the readerIndex if we overflowed the int type.
        in.readerIndex(readerIndex);
        throw DECODE_ULE_128_TO_INT_DECOMPRESSION_EXCEPTION;
    }
    return (int) v;
}

---

From source file:io.grpc.netty.GrpcHpackDecoder.java

License:Apache License

/**
 * Unsigned Little Endian Base 128 Variable-Length Integer Encoding
 * <p>/*from ww  w . j a v a2 s . co  m*/
 * Visible for testing only!
 */
static long decodeULE128(ByteBuf in, long result) throws Http2Exception {
    assert result <= 0x7f && result >= 0;
    final boolean resultStartedAtZero = result == 0;
    final int writerIndex = in.writerIndex();
    for (int readerIndex = in.readerIndex(), shift = 0; readerIndex < writerIndex; ++readerIndex, shift += 7) {
        byte b = in.getByte(readerIndex);
        if (shift == 56 && (((b & 0x80) != 0 || b == 0x7F) && !resultStartedAtZero)) {
            // the maximum value that can be represented by a signed 64 bit number is:
            // [0x01L, 0x7fL] + 0x7fL + (0x7fL << 7) + (0x7fL << 14) + (0x7fL << 21) + (0x7fL << 28) + (0x7fL << 35)
            // + (0x7fL << 42) + (0x7fL << 49) + (0x7eL << 56)
            // OR
            // 0x0L + 0x7fL + (0x7fL << 7) + (0x7fL << 14) + (0x7fL << 21) + (0x7fL << 28) + (0x7fL << 35) +
            // (0x7fL << 42) + (0x7fL << 49) + (0x7fL << 56)
            // this means any more shifts will result in overflow so we should break out and throw an error.
            throw DECODE_ULE_128_TO_LONG_DECOMPRESSION_EXCEPTION;
        }

        if ((b & 0x80) == 0) {
            in.readerIndex(readerIndex + 1);
            return result + ((b & 0x7FL) << shift);
        }
        result += (b & 0x7FL) << shift;
    }

    throw DECODE_ULE_128_DECOMPRESSION_EXCEPTION;
}

---

From source file:io.grpc.netty.GrpcHpackHuffmanDecoder.java

License:Apache License

/**
 * Decompresses the given Huffman coded string literal.
 *
 * @param buf the string literal to be decoded
 * @return the output stream for the compressed data
 * @throws Http2Exception EOS Decoded//from  ww  w. ja  v a  2  s  .  co m
 */
public AsciiString decode(ByteBuf buf, int length) throws Http2Exception {
    processor.reset();
    buf.forEachByte(buf.readerIndex(), length, processor);
    buf.skipBytes(length);
    return processor.end();
}

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From source file:io.hekate.network.netty.NettyMessage.java

License:Apache License

static String utf(ByteBuf buf) throws IOException {
    try {//from   w  w w.jav  a 2s  . co  m
        int len = buf.readInt();

        String string = buf.toString(buf.readerIndex(), len, StandardCharsets.UTF_8);

        buf.skipBytes(len);

        return string;
    } catch (IndexOutOfBoundsException e) {
        throw endOfStream(e);
    }
}

---

From source file:io.hekate.network.netty.NettyMessageTest.java

License:Apache License

@Test
public void testPreview() throws Exception {
    ByteBuf buf = Unpooled.buffer();

    buf.writeByte(10);//from   w ww . ja  v  a2  s  .c  o m
    buf.writeBoolean(true);
    buf.writeInt(100);
    buf.writeLong(1000);
    buf.writeDouble(1.01);

    NettyMessage msg = new NettyMessage(buf, new Codec<Object>() {
        @Override
        public boolean isStateful() {
            return false;
        }

        @Override
        public Class<Object> baseType() {
            return Object.class;
        }

        @Override
        public Object decode(DataReader in) throws IOException {
            throw new AssertionError("Should not be called.");
        }

        @Override
        public void encode(Object obj, DataWriter out) throws IOException {
            throw new AssertionError("Should not be called.");
        }
    });

    assertEquals((byte) 10, (byte) msg.preview(DataInput::readByte));
    assertEquals(0, buf.readerIndex());

    assertTrue(msg.previewBoolean(m -> {
        m.skipBytes(1);

        return m.readBoolean();
    }));
    assertEquals(0, buf.readerIndex());

    assertEquals(100, msg.previewInt(m -> {
        m.skipBytes(2);

        return m.readInt();
    }));
    assertEquals(0, buf.readerIndex());

    assertEquals(1000, msg.previewLong(m -> {
        m.skipBytes(6);

        return m.readLong();
    }));
    assertEquals(0, buf.readerIndex());

    assertEquals(1.01, msg.previewDouble(m -> {
        m.skipBytes(14);

        return m.readDouble();
    }), 1000);
    assertEquals(0, buf.readerIndex());

    assertEquals(1, buf.refCnt());

    msg.release();

    assertEquals(0, buf.refCnt());
}

---

From source file:io.hydramq.core.type.converters.StringConverter.java

License:Open Source License

@Override
public String read(final ConversionContext context, final ByteBuf buffer) {
    int size = buffer.readInt();
    String value = buffer.toString(buffer.readerIndex(), size, CharsetUtil.UTF_8);
    buffer.skipBytes(size);// ww  w . java 2s. c o  m
    return value;
}

---

From source file:io.jsync.dns.impl.netty.decoder.TextDecoder.java

License:Open Source License

/**
 * Returns a decoded TXT (text) resource record, stored as an
 * {@link ArrayList} of {@code String}s.
 *
 * @param response the DNS response that contains the resource record being
 *                 decoded//from   w w w  . ja v  a2 s  .  c  o m
 * @param resource the resource record being decoded
 */
@Override
public List<String> decode(DnsResponse response, DnsResource resource) {
    List<String> list = new ArrayList<String>();
    ByteBuf data = resource.content().readerIndex(response.originalIndex());
    int index = data.readerIndex();
    while (index < data.writerIndex()) {
        int len = data.getUnsignedByte(index++);
        list.add(data.toString(index, len, CharsetUtil.UTF_8));
        index += len;
    }
    return list;
}

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