Example usage for io.netty.buffer Unpooled buffer

Introduction

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

Prototype

public static ByteBuf buffer()

Source Link

Document

Creates a new big-endian Java heap buffer with reasonably small initial capacity, which expands its capacity boundlessly on demand.

Usage

From source file:com.twitter.http2.HttpHeaderBlockEncoder.java

License:Apache License

/**
 * Encode the header block frame./*from   ww w.ja  va 2  s . c o m*/
 */
public ByteBuf encode(ChannelHandlerContext ctx, HttpHeaderBlockFrame frame) throws IOException {
    ByteBuf buf = Unpooled.buffer();
    ByteBufOutputStream out = new ByteBufOutputStream(buf);

    // The current allowable max header table size is the
    // minimum of the encoder and decoder allowable sizes
    int allowableHeaderTableSize = Math.min(encoderMaxHeaderTableSize, decoderMaxHeaderTableSize);

    // maxHeaderTableSize will hold the smallest size seen the
    // last call to encode. This might be smaller than the
    // current allowable max header table size
    if (maxHeaderTableSize < allowableHeaderTableSize) {
        encoder.setMaxHeaderTableSize(out, maxHeaderTableSize);
    }

    // Check if the current allowable size is equal to the encoder's
    // capacity and set the new size if necessary
    if (allowableHeaderTableSize != encoder.getMaxHeaderTableSize()) {
        encoder.setMaxHeaderTableSize(out, allowableHeaderTableSize);
    }

    // Store the current allowable size for the next call
    maxHeaderTableSize = allowableHeaderTableSize;

    // Now we can encode headers
    for (String name : frame.headers().names()) {
        if ("cookie".equalsIgnoreCase(name)) {
            // Sec. 8.1.3.4. Cookie Header Field
            for (String value : frame.headers().getAll(name)) {
                for (String crumb : value.split(";")) {
                    byte[] valueBytes = crumb.trim().getBytes(StandardCharsets.UTF_8);
                    encoder.encodeHeader(out, COOKIE, valueBytes, true);
                }
            }
        } else {
            byte[] nameBytes = name.toLowerCase(Locale.ENGLISH).getBytes(StandardCharsets.UTF_8);
            // Sec. 8.1.3.3. Header Field Ordering
            List<String> values = frame.headers().getAll(name);
            if (values.size() == 0) {
                encoder.encodeHeader(out, nameBytes, EMPTY, false);
            } else {
                for (String value : values) {
                    byte[] valueBytes = value.getBytes(StandardCharsets.UTF_8);
                    encoder.encodeHeader(out, nameBytes, valueBytes, false);
                }
            }
        }
    }

    return buf;
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeString() throws Exception {
    String str = "Hello, TChannel!";
    ByteBuf buf = Unpooled.buffer();
    CodecUtils.encodeString(str, buf);/*  w ww .  j  a  v  a2  s .co m*/
    String newStr = CodecUtils.decodeString(buf);
    assertEquals(str, newStr);
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeUnicodeString() throws Exception {
    String str = "??";
    ByteBuf buf = Unpooled.buffer();
    CodecUtils.encodeString(str, buf);/*w ww.  j  ava  2 s.com*/
    String newStr = CodecUtils.decodeString(buf);
    assertEquals(str, newStr);
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeEmojiString() throws Exception {
    String str = "\uD83C\uDF89\uD83C\uDF7B";
    ByteBuf buf = Unpooled.buffer();
    CodecUtils.encodeString(str, buf);//from   ww  w.java2 s.com
    String newStr = CodecUtils.decodeString(buf);
    assertEquals(str, newStr);
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeSmallString() throws Exception {
    String str = "Hello, TChannel!";
    ByteBuf buf = Unpooled.buffer();
    CodecUtils.encodeSmallString(str, buf);
    String newStr = CodecUtils.decodeSmallString(buf);
    assertEquals(str, newStr);/*from   w  ww. ja  v  a2s.com*/
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeUnicodeSmallString() throws Exception {
    String str = "??";
    ByteBuf buf = Unpooled.buffer();
    CodecUtils.encodeSmallString(str, buf);
    String newStr = CodecUtils.decodeSmallString(buf);
    assertEquals(str, newStr);//from   ww  w .ja  v a  2 s .co m
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeHeaders() throws Exception {
    Map<String, String> headers = new HashMap<String, String>();
    ByteBuf buf = Unpooled.buffer();

    headers.put("Hello", "TChannel");
    headers.put("", "?");
    headers.put("????", "");

    CodecUtils.encodeHeaders(headers, buf);

    Map<String, String> newHeaders = CodecUtils.decodeHeaders(buf);
    assertEquals(headers, newHeaders);//from www .jav a2  s .c  o m

}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeSmallHeaders() throws Exception {
    Map<String, String> headers = new HashMap<String, String>();
    ByteBuf buf = Unpooled.buffer();

    headers.put("Hello", "TChannel");
    headers.put("", "?");
    headers.put("????", "");

    CodecUtils.encodeSmallHeaders(headers, buf);

    Map<String, String> newHeaders = CodecUtils.decodeSmallHeaders(buf);
    assertEquals(headers, newHeaders);//from   ww w . j  a  v  a 2s.  c  om
}

From source file:com.uber.tchannel.codecs.CodecUtilsTest.java

License:Open Source License

@Test
public void testEncodeDecodeTrace() throws Exception {

    Trace trace = new Trace(1, 2, 3, (byte) 0x04);
    ByteBuf buf = Unpooled.buffer();
    CodecUtils.encodeTrace(trace, buf);//  w ww. ja va 2s .  c  o m
    Trace newTrace = CodecUtils.decodeTrace(buf);
    assertEquals(trace.parentId, newTrace.parentId);
    assertEquals(trace.spanId, newTrace.spanId);
    assertEquals(trace.traceId, newTrace.traceId);
    assertEquals(trace.traceFlags, newTrace.traceFlags);

}

From source file:com.vethrfolnir.encdec.ReadDataFiles.java

License:Open Source License

public static long[] readFile(URL url) {

    ByteBuf buff = Unpooled.buffer().order(ByteOrder.LITTLE_ENDIAN);

    try (DataInputStream is = new DataInputStream(url.openStream())) {
        buff.writeBytes(is, is.available());
    } catch (Exception e) {
        throw new RuntimeException(e);
    }// w  w  w.j  a  va2  s . c  o m

    int bits2 = buff.readUnsignedShort();

    System.out.println("First two bits: " + bits2 + " hex: 0x" + PrintData.fillHex(bits2, 2));

    long[] out_dat = new long[12];

    buff.readerIndex(6);
    int pointer = 0;
    for (int i = 0; i < 3; i++) {
        long[] buf = new long[4];

        for (int j = 0; j < 4; j++) {
            buf[j] = buff.readUnsignedInt();
        }

        out_dat[pointer++] = buf[0] ^ (xor_tab_datfile[0]);
        out_dat[pointer++] = buf[1] ^ (xor_tab_datfile[1] & 0xFFFFFFFFL);
        out_dat[pointer++] = buf[2] ^ (xor_tab_datfile[2] & 0xFFFFFFFFL);
        out_dat[pointer++] = buf[3] ^ (xor_tab_datfile[3]);
    }

    for (int i = 0; i < out_dat.length; i++) {
        System.out.print(" " + (out_dat[i]));
    }

    System.out.println();
    return null;
}