Examples with Deflater java.util.zip.Deflater used on opensource projects

Example 11 with Deflater

use of java.util.zip.Deflater in project jetty.project by eclipse.

the class DeflateFrameExtensionTest method testDeflateBasics.

@Test
public void testDeflateBasics() throws Exception {
    // Setup deflater basics
    Deflater compressor = new Deflater(Deflater.BEST_COMPRESSION, true);
    compressor.setStrategy(Deflater.DEFAULT_STRATEGY);
    // Text to compress
    String text = "info:";
    byte[] uncompressed = StringUtil.getUtf8Bytes(text);
    // Prime the compressor
    compressor.reset();
    compressor.setInput(uncompressed, 0, uncompressed.length);
    compressor.finish();
    // Perform compression
    ByteBuffer outbuf = ByteBuffer.allocate(64);
    BufferUtil.clearToFill(outbuf);
    while (!compressor.finished()) {
        byte[] out = new byte[64];
        int len = compressor.deflate(out, 0, out.length, Deflater.SYNC_FLUSH);
        if (len > 0) {
            outbuf.put(out, 0, len);
        }
    }
    compressor.end();
    BufferUtil.flipToFlush(outbuf, 0);
    byte[] compressed = BufferUtil.toArray(outbuf);
    // Clear the BFINAL bit that has been set by the compressor.end() call.
    // In the real implementation we never end() the compressor.
    compressed[0] &= 0xFE;
    String actual = TypeUtil.toHexString(compressed);
    // what pywebsocket produces
    String expected = "CaCc4bCbB70200";
    Assert.assertThat("Compressed data", actual, is(expected));
}

Example 12 with Deflater

use of java.util.zip.Deflater in project mapdb by jankotek.

the class SerializerCompressionDeflateWrapper method serialize.

//        /** used for deserialization */
//        @SuppressWarnings("unchecked")
//        protected SerializerCompressionDeflateWrapper(SerializerBase serializerBase, DataInput2 is, SerializerBase.FastArrayList<Object> objectStack) throws IOException {
//            objectStack.add(this);
//            this.serializer = (Serializer<E>) serializerBase.deserialize(is,objectStack);
//            this.compressLevel = is.readByte();
//            int dictlen = is.unpackInt();
//            if(dictlen==0) {
//                dictionary = null;
//            } else {
//                byte[] d = new byte[dictlen];
//                is.readFully(d);
//                dictionary = d;
//            }
//        }
@Override
public void serialize(DataOutput2 out, E value) throws IOException {
    DataOutput2 out2 = new DataOutput2();
    serializer.serialize(out2, value);
    byte[] tmp = new byte[out2.pos + 41];
    int newLen;
    try {
        Deflater deflater = new Deflater(compressLevel);
        if (dictionary != null) {
            deflater.setDictionary(dictionary);
        }
        deflater.setInput(out2.buf, 0, out2.pos);
        deflater.finish();
        newLen = deflater.deflate(tmp);
    //LZF.get().compress(out2.buf,out2.pos,tmp,0);
    } catch (IndexOutOfBoundsException e) {
        //larger after compression
        newLen = 0;
    }
    if (newLen >= out2.pos || newLen == 0) {
        //compression adds size, so do not compress
        out.packInt(0);
        out.write(out2.buf, 0, out2.pos);
        return;
    }
    //unpacked size, zero indicates no compression
    out.packInt(out2.pos + 1);
    out.write(tmp, 0, newLen);
}

Example 13 with Deflater

use of java.util.zip.Deflater in project Mycat-Server by MyCATApache.

the class CompressUtil method compress.

/**
	 * 适用于mysql与客户端交互时zlib 压缩
	 *  
	 * @param data
	 * @return
	 */
public static byte[] compress(byte[] data) {
    byte[] output = null;
    Deflater compresser = new Deflater();
    compresser.setInput(data);
    compresser.finish();
    ByteArrayOutputStream out = new ByteArrayOutputStream(data.length);
    byte[] result = new byte[1024];
    try {
        while (!compresser.finished()) {
            int length = compresser.deflate(result);
            out.write(result, 0, length);
        }
        output = out.toByteArray();
    } finally {
        try {
            out.close();
        } catch (Exception e) {
        }
        compresser.end();
    }
    return output;
}

Example 14 with Deflater

use of java.util.zip.Deflater in project jersey by jersey.

the class DeflateEncoder method encode.

@Override
public OutputStream encode(String contentEncoding, OutputStream entityStream) throws IOException {
    // some implementations don't support the correct deflate
    // so we have a property to configure the incorrect deflate (no zlib wrapper) should be used
    // let's check that
    Object value = config.getProperty(MessageProperties.DEFLATE_WITHOUT_ZLIB);
    boolean deflateWithoutZLib;
    if (value instanceof String) {
        deflateWithoutZLib = Boolean.valueOf((String) value);
    } else if (value instanceof Boolean) {
        deflateWithoutZLib = (Boolean) value;
    } else {
        deflateWithoutZLib = false;
    }
    return deflateWithoutZLib ? new DeflaterOutputStream(entityStream, new Deflater(Deflater.DEFAULT_COMPRESSION, true)) : new DeflaterOutputStream(entityStream);
}

Example 15 with Deflater

use of java.util.zip.Deflater in project dropwizard by dropwizard.

the class BiDiGzipHandlerTest method testDecompressDeflateRequestGzipCompatible.

@Test
public void testDecompressDeflateRequestGzipCompatible() throws Exception {
    request.setMethod("POST");
    request.setURI("/banner");
    request.setHeader(HttpHeaders.CONTENT_ENCODING, "deflate");
    request.setHeader(HttpHeaders.CONTENT_TYPE, PLAIN_TEXT_UTF_8);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    try (DeflaterOutputStream deflate = new DeflaterOutputStream(baos, new Deflater(-1, true))) {
        Resources.copy(Resources.getResource("assets/new-banner.txt"), deflate);
    }
    request.setContent(baos.toByteArray());
    HttpTester.Response response = HttpTester.parseResponse(servletTester.getResponses(request.generate()));
    assertThat(response.getStatus()).isEqualTo(200);
    assertThat(response.getContent()).isEqualTo("Banner has been updated");
}