Example usage for java.util.zip Deflater Deflater

Introduction

In this page you can find the example usage for java.util.zip Deflater Deflater.

Prototype

public Deflater(int level, boolean nowrap) 

Source Link

Document

Creates a new compressor using the specified compression level.

Usage

From source file:divconq.ctp.stream.GzipStream.java

@Override
public ReturnOption handle(FileDescriptor file, ByteBuf data) {
    if (file == FileDescriptor.FINAL)
        return this.downstream.handle(file, data);

    // we don't know what to do with a folder at this stage - gzip is for file content only
    // folder scanning is upstream in the FileSourceStream and partners
    if (file.isFolder())
        return ReturnOption.CONTINUE;

    // init if not set for this round of processing 
    if (this.deflater == null) {
        this.deflater = new Deflater(this.compressionLevel, true);
        this.crc.reset();
        this.writeHeader = true;
    }/*from www  .  ja v a  2 s .  c om*/

    ByteBuf in = data;
    ByteBuf out = null;

    if (in != null) {
        byte[] inAry = in.array();

        // always allow for a header (10) plus footer (8) plus extra (12)
        // in addition to content
        int sizeEstimate = (int) Math.ceil(in.readableBytes() * 1.001) + 30;
        out = Hub.instance.getBufferAllocator().heapBuffer(sizeEstimate);

        if (this.writeHeader) {
            this.writeHeader = false;
            out.writeBytes(gzipHeader);
        }

        this.crc.update(inAry, in.arrayOffset(), in.writerIndex());

        this.deflater.setInput(inAry, in.arrayOffset(), in.writerIndex());

        while (!this.deflater.needsInput())
            deflate(out);
    } else
        out = Hub.instance.getBufferAllocator().heapBuffer(30);

    FileDescriptor blk = new FileDescriptor();

    if (StringUtil.isEmpty(this.lastpath)) {
        if (StringUtil.isNotEmpty(this.nameHint))
            this.lastpath = "/" + this.nameHint;
        else if (file.getPath() != null)
            this.lastpath = "/" + GzipUtils.getCompressedFilename(file.path().getFileName());
        else
            this.lastpath = "/" + FileUtil.randomFilename("gz");
    }

    blk.setPath(this.lastpath);

    file.setModTime(System.currentTimeMillis());

    if (file.isEof()) {
        this.deflater.finish();

        while (!this.deflater.finished())
            deflate(out);

        int crcValue = (int) this.crc.getValue();

        out.writeByte(crcValue);
        out.writeByte(crcValue >>> 8);
        out.writeByte(crcValue >>> 16);
        out.writeByte(crcValue >>> 24);

        int uncBytes = this.deflater.getTotalIn();

        out.writeByte(uncBytes);
        out.writeByte(uncBytes >>> 8);
        out.writeByte(uncBytes >>> 16);
        out.writeByte(uncBytes >>> 24);

        this.deflater.end();
        this.deflater = null; // cause a reset for next time we use stream

        blk.setEof(true);
    }

    if (in != null)
        in.release();

    return this.downstream.handle(blk, out);
}

---

From source file:com.tremolosecurity.unison.u2f.util.U2fUtil.java

public static String encode(List<SecurityKeyData> devices, String encyrptionKeyName) throws Exception {
    ArrayList<KeyHolder> keys = new ArrayList<KeyHolder>();
    for (SecurityKeyData dr : devices) {
        KeyHolder kh = new KeyHolder();
        kh.setCounter(dr.getCounter());//from  w  w w.  j a  va2 s  . co m
        kh.setEnrollmentTime(dr.getEnrollmentTime());
        kh.setKeyHandle(dr.getKeyHandle());
        kh.setPublicKey(dr.getPublicKey());
        kh.setTransports(dr.getTransports());
        keys.add(kh);
    }

    String json = gson.toJson(keys);
    EncryptedMessage msg = new EncryptedMessage();

    SecretKey key = GlobalEntries.getGlobalEntries().getConfigManager().getSecretKey(encyrptionKeyName);
    if (key == null) {
        throw new Exception("Queue message encryption key not found");
    }

    Cipher cipher = Cipher.getInstance("AES/CBC/PKCS5Padding");
    cipher.init(Cipher.ENCRYPT_MODE, key);
    msg.setMsg(cipher.doFinal(json.getBytes("UTF-8")));
    msg.setIv(cipher.getIV());

    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    DeflaterOutputStream compressor = new DeflaterOutputStream(baos,
            new Deflater(Deflater.BEST_COMPRESSION, true));

    compressor.write(gson.toJson(msg).getBytes("UTF-8"));
    compressor.flush();
    compressor.close();

    String b64 = new String(Base64.encodeBase64(baos.toByteArray()));

    return b64;

}

---

From source file:com.alibaba.citrus.service.requestcontext.session.encoder.AbstractSerializationEncoder.java

/** ? */
public String encode(Map<String, Object> attrs, StoreContext storeContext) throws SessionEncoderException {
    ByteArrayOutputStream baos = new ByteArrayOutputStream();

    // 1. ?/*  w ww.  j  av  a  2 s .com*/
    // 2. 
    Deflater def = new Deflater(Deflater.BEST_COMPRESSION, false);
    DeflaterOutputStream dos = new DeflaterOutputStream(baos, def);

    try {
        serializer.serialize(assertNotNull(attrs, "objectToEncode is null"), dos);
    } catch (Exception e) {
        throw new SessionEncoderException("Failed to encode session state", e);
    } finally {
        try {
            dos.close();
        } catch (IOException e) {
        }

        def.end();
    }

    byte[] plaintext = baos.toByteArray().toByteArray();

    // 3. 
    byte[] cryptotext = encrypt(plaintext);

    // 4. base64?
    try {
        String encodedValue = new String(Base64.encodeBase64(cryptotext, false), "ISO-8859-1");

        return URLEncoder.encode(encodedValue, "ISO-8859-1");
    } catch (UnsupportedEncodingException e) {
        throw new SessionEncoderException("Failed to encode session state", e);
    }
}

---

From source file:ch.cern.security.saml2.utils.xml.XMLUtils.java

/**
 * Compress the xml string and encodes it in Base64
 * /*from  ww w  . j  a v  a 2 s.c  om*/
 * @param xmlString
 * @param isDebugEnabled 
 * @return xml string encoded
 * @throws IOException
 * @throws UnsupportedEncodingException
 */
public static String xmlDeflateAndEncode(String xmlString, boolean isDebugEnabled)
        throws IOException, UnsupportedEncodingException {

    if (isDebugEnabled)
        nc.notice(xmlString);

    // Deflate the SAMLResponse value
    ByteArrayOutputStream bytesOut = new ByteArrayOutputStream();
    Deflater deflater = new Deflater(Deflater.DEFLATED, true);
    DeflaterOutputStream deflaterStream = new DeflaterOutputStream(bytesOut, deflater);
    deflaterStream.write(xmlString.getBytes());
    deflaterStream.finish();

    // Encoded the deflatedResponse in base64
    Base64 base64encoder = new Base64();
    String base64response = new String(base64encoder.encode(bytesOut.toByteArray()), "UTF-8");

    if (isDebugEnabled)
        nc.notice(base64response);

    return base64response;
}

---

From source file:ZipUtil.java

public static void zipFileToFile(File flSource, File flTarget) throws IOException {
    Deflater oDeflate = new Deflater(Deflater.DEFLATED, false);

    FileInputStream stmFileIn = new FileInputStream(flSource);
    FileOutputStream stmFileOut = new FileOutputStream(flTarget);
    DeflaterOutputStream stmDeflateOut = new DeflaterOutputStream(stmFileOut, oDeflate);
    try {//from  www .ja va 2s .  c  om
        // FileUtil.inputStreamToOutputStream(stmFileIn, stmDeflateOut);
    } //end try
    finally {
        stmDeflateOut.finish();
        stmDeflateOut.flush();
        stmDeflateOut.close();
        stmFileOut.close();
        stmFileIn.close();
    }
}

---

From source file:de.hofuniversity.iisys.neo4j.websock.query.encoding.safe.TSafeDeflateJsonQueryHandler.java

@Override
public ByteBuffer encode(final WebsockQuery query) throws EncodeException {
    ByteBuffer result = null;//w w  w  .  ja  v  a  2 s . c o m

    try {
        final JSONObject obj = JsonConverter.toJson(query);
        byte[] data = obj.toString().getBytes();

        //compress
        final Deflater deflater = new Deflater(fCompression, true);
        deflater.setInput(data);

        int read = 0;
        int totalSize = 0;
        final List<byte[]> buffers = new LinkedList<byte[]>();

        final byte[] buffer = new byte[BUFFER_SIZE];
        read = deflater.deflate(buffer, 0, BUFFER_SIZE, Deflater.SYNC_FLUSH);
        while (read > 0) {
            totalSize += read;
            buffers.add(Arrays.copyOf(buffer, read));
            read = deflater.deflate(buffer, 0, BUFFER_SIZE, Deflater.SYNC_FLUSH);
        }

        result = fuse(buffers, totalSize);

        if (fDebug) {
            fTotalBytesOut += totalSize;
            fLogger.log(Level.FINEST, "encoded compressed JSON message: " + totalSize + " bytes\n"
                    + "total bytes sent: " + fTotalBytesOut);
        }
    } catch (JSONException e) {
        e.printStackTrace();
        throw new EncodeException(query, "failed to encode JSON", e);
    }

    return result;
}

---

From source file:org.simbasecurity.core.saml.SAMLServiceImpl.java

protected String encodeSAMLRequest(byte[] pSAMLRequest) throws RuntimeException {
    Base64 base64Encoder = new Base64();

    try {//w ww.  j  a  v a  2  s  .com
        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
        Deflater deflater = new Deflater(Deflater.DEFAULT_COMPRESSION, true);

        DeflaterOutputStream def = new DeflaterOutputStream(byteArray, deflater);
        def.write(pSAMLRequest);
        def.close();
        byteArray.close();

        String stream = new String(base64Encoder.encode(byteArray.toByteArray()));

        return stream.trim();
    } catch (Exception e) {
        throw new RuntimeException(e);
    }
}

---

From source file:org.squale.welcom.struts.webServer.WebEngine.java

/**
 * gzip / deflate / none//  w  w  w .  j ava  2 s .c o m
 * 
 * @return OutPuStream en focntion de la configuration
 * @throws IOException IOException
 */
public OutputStream getOutputStream() throws IOException {
    OutputStream out;
    if ((request.getHeader("Accept-Encoding") != null) && (request.getHeader("Accept-Encoding").indexOf(
            WelcomConfigurator.getMessage(WelcomConfigurator.OPTIFLUX_COMPRESSION_MODE).toLowerCase()) > -1)) {
        response.setHeader("Content-Encoding",
                WelcomConfigurator.getMessage(WelcomConfigurator.OPTIFLUX_COMPRESSION_MODE).toLowerCase());

        if (Util.isEqualsIgnoreCase(WelcomConfigurator.getMessage(WelcomConfigurator.OPTIFLUX_COMPRESSION_MODE),
                "deflate")) {
            out = new DeflaterOutputStream(response.getOutputStream(), new Deflater(COMPRESSION_LEVEL, true));
        } else {
            out = new GZIPOutputStream(response.getOutputStream());
        }
    } else {
        out = response.getOutputStream();
    }
    return out;
}

---

From source file:de.hofuniversity.iisys.neo4j.websock.query.encoding.unsafe.DeflateJsonQueryHandler.java

@Override
public ByteBuffer encode(final WebsockQuery query) throws EncodeException {
    ByteBuffer result = null;/*from   w  w  w .j a v  a 2 s  . c  om*/

    try {
        final JSONObject obj = JsonConverter.toJson(query);
        byte[] data = obj.toString().getBytes();

        //compress
        final Deflater deflater = new Deflater(fCompression, true);
        deflater.setInput(data);
        deflater.finish();

        int totalSize = 0;

        int read = deflater.deflate(fBuffer, 0, BUFFER_SIZE, Deflater.SYNC_FLUSH);
        while (true) {
            totalSize += read;

            if (deflater.finished()) {
                //if finished, directly add buffer
                fBuffers.add(fBuffer);
                break;
            } else {
                //make a copy, reuse buffer
                fBuffers.add(Arrays.copyOf(fBuffer, read));
                read = deflater.deflate(fBuffer, 0, BUFFER_SIZE, Deflater.SYNC_FLUSH);
            }
        }

        result = fuse(totalSize);

        deflater.end();

        if (fDebug) {
            fTotalBytesOut += totalSize;
            fLogger.log(Level.FINEST, "encoded compressed JSON message: " + totalSize + " bytes\n"
                    + "total bytes sent: " + fTotalBytesOut);
        }
    } catch (JSONException e) {
        e.printStackTrace();
        throw new EncodeException(query, "failed to encode JSON", e);
    }

    return result;
}

---

From source file:com.alibaba.citrus.service.requestcontext.session.valueencoder.AbstractSessionValueEncoder.java

private byte[] compress(byte[] data) throws SessionValueEncoderException {
    if (!doCompress()) {
        return data;
    }//from   w w w . j a v  a  2 s  .  c  o m

    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    Deflater def = new Deflater(Deflater.BEST_COMPRESSION, false);
    DeflaterOutputStream dos = new DeflaterOutputStream(baos, def);

    try {
        dos.write(data);
    } catch (Exception e) {
        throw new SessionValueEncoderException(e);
    } finally {
        try {
            dos.close();
        } catch (IOException e) {
        }

        def.end();
    }

    return baos.toByteArray();
}

---

• «
• 1
• 2
• 3
• 4
• 5
• 6
• 7
• »