Example usage for java.util.zip Inflater inflate

Introduction

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

Prototype

public int inflate(ByteBuffer output) throws DataFormatException 

Source Link

Document

Uncompresses bytes into specified buffer.

Usage

From source file:Main.java

public static byte[] decompress(byte[] data, int off, int len, int srcLen) {
    byte[] output = null;
    Inflater decompresser = new Inflater();
    decompresser.reset();// w  w w  . java  2s.co m
    //      decompresser.setInput(data);
    decompresser.setInput(data, off, len);

    ByteArrayOutputStream o = new ByteArrayOutputStream(srcLen);
    try {
        o.reset();
        byte[] buf = new byte[1024];
        while (!decompresser.finished()) {
            int i = decompresser.inflate(buf);
            o.write(buf, 0, i);
        }
        output = o.toByteArray();
    } catch (Exception e) {
        throw new RuntimeException(e);
    } finally {
        try {
            o.close();
            decompresser.end();
        } catch (Exception e) {
        }
    }

    return output;
}

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From source file:Main.java

public static byte[] zlibDecompress(byte[] data, int offset, int length) {
    byte[] output = null;

    Inflater decompresser = new Inflater();
    decompresser.reset();//w  ww . j  av a 2  s . c om
    try {
        decompresser.setInput(data, offset, length);
    } catch (Exception e) {
        return null;
    }

    ByteArrayOutputStream o = new ByteArrayOutputStream(data.length);
    try {
        byte[] buf = new byte[1024];
        while (!decompresser.finished()) {
            int i = decompresser.inflate(buf);
            o.write(buf, 0, i);
        }
        output = o.toByteArray();
    } catch (Exception e) {
        output = data;
        e.printStackTrace();
    } finally {
        try {
            o.close();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    decompresser.end();
    return output;
}

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From source file:org.socraticgrid.workbench.security.wso2.Saml2Util.java

/**
 * Decoding and deflating the encoded AuthReq
 *
 * @param encodedStr encoded AuthReq/*from   www  .j a  v a  2  s  .  c  o m*/
 * @return decoded AuthReq
 */
public static String decode(String encodedStr) throws Exception {
    try {
        org.apache.commons.codec.binary.Base64 base64Decoder = new org.apache.commons.codec.binary.Base64();
        byte[] xmlBytes = encodedStr.getBytes("UTF-8");
        byte[] base64DecodedByteArray = base64Decoder.decode(xmlBytes);

        try {
            Inflater inflater = new Inflater(true);
            inflater.setInput(base64DecodedByteArray);
            byte[] xmlMessageBytes = new byte[5000];
            int resultLength = inflater.inflate(xmlMessageBytes);

            if (!inflater.finished()) {
                throw new RuntimeException("didn't allocate enough space to hold " + "decompressed data");
            }

            inflater.end();
            return new String(xmlMessageBytes, 0, resultLength, "UTF-8");

        } catch (DataFormatException e) {
            ByteArrayInputStream bais = new ByteArrayInputStream(base64DecodedByteArray);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            InflaterInputStream iis = new InflaterInputStream(bais);
            byte[] buf = new byte[1024];
            int count = iis.read(buf);
            while (count != -1) {
                baos.write(buf, 0, count);
                count = iis.read(buf);
            }
            iis.close();
            String decodedStr = new String(baos.toByteArray());
            return decodedStr;
        }
    } catch (IOException e) {
        throw new Exception("Error when decoding the SAML Request.", e);
    }

}

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From source file:radixcore.network.ByteBufIO.java

/**
 * Decompresses a compressed byte array.
 * /*  w ww  .  j  a  v a  2 s . c  o  m*/
 * @param input The byte array to be decompressed.
 * @return The byte array in its decompressed, readable form.
 */
public static byte[] decompress(byte[] input) {
    try {
        final Inflater inflater = new Inflater();
        final ByteArrayOutputStream byteOutput = new ByteArrayOutputStream(input.length);
        final byte[] buffer = new byte[1024];
        inflater.setInput(input);

        while (!inflater.finished()) {
            final int count = inflater.inflate(buffer);
            byteOutput.write(buffer, 0, count);
        }

        inflater.end();
        byteOutput.close();
        return byteOutput.toByteArray();
    }

    catch (final DataFormatException e) {
        RadixExcept.logFatalCatch(e, "Error decompressing byte array.");
        return null;
    }

    catch (final IOException e) {
        RadixExcept.logFatalCatch(e, "Error decompressing byte array.");
        return null;
    }
}

---

From source file:org.wso2.identity.integration.test.requestPathAuthenticator.RequestPathAuthenticatorTestCase.java

/**
 * Decoding and deflating the encoded AuthReq
 *
 * @param encodedStr encoded AuthReq/*from w ww . j av a  2s.  c  o  m*/
 * @return decoded AuthReq
 */
private static String decode(String encodedStr) {
    try {
        Base64 base64Decoder = new Base64();
        byte[] xmlBytes = encodedStr.getBytes(DEFAULT_CHARSET);
        byte[] base64DecodedByteArray = base64Decoder.decode(xmlBytes);

        try {
            Inflater inflater = new Inflater(true);
            inflater.setInput(base64DecodedByteArray);
            byte[] xmlMessageBytes = new byte[5000];
            int resultLength = inflater.inflate(xmlMessageBytes);

            if (!inflater.finished()) {
                throw new RuntimeException("End of the compressed data stream has NOT been reached");
            }

            inflater.end();
            String decodedString = new String(xmlMessageBytes, 0, resultLength, (DEFAULT_CHARSET));
            return decodedString;

        } catch (DataFormatException e) {
            ByteArrayInputStream byteArrayInputStream = new ByteArrayInputStream(base64DecodedByteArray);
            ByteArrayOutputStream byteArrayOutputStream = new ByteArrayOutputStream();
            InflaterInputStream iis = new InflaterInputStream(byteArrayInputStream);
            byte[] buf = new byte[1024];
            int count = iis.read(buf);
            while (count != -1) {
                byteArrayOutputStream.write(buf, 0, count);
                count = iis.read(buf);
            }
            iis.close();
            String decodedStr = new String(byteArrayOutputStream.toByteArray(), StandardCharsets.UTF_8);

            return decodedStr;
        }
    } catch (IOException e) {
        Assert.fail("Error while decoding SAML response");
        return "";
    }
}

---

From source file:ZipUtil.java

/**
 * Inflates a previously deflated file./*from  w  w  w  . ja v  a  2  s  .c  om*/
 */
public static byte[] unzipByteArray(byte[] file) throws IOException {
    byte[] byReturn = null;

    Inflater oInflate = new Inflater(false);
    oInflate.setInput(file);

    ByteArrayOutputStream oZipStream = new ByteArrayOutputStream();
    try {
        while (!oInflate.finished()) {
            byte[] byRead = new byte[ZIP_BUFFER_SIZE];
            int iBytesRead = oInflate.inflate(byRead);
            if (iBytesRead == byRead.length) {
                oZipStream.write(byRead);
            } else {
                oZipStream.write(byRead, 0, iBytesRead);
            }
        }
        byReturn = oZipStream.toByteArray();
    } catch (DataFormatException ex) {
        throw new IOException("Attempting to unzip file that is not zipped.");
    } finally {
        oZipStream.close();
    }
    return byReturn;
}

---

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

public static String xmlDecodeAndInflate(String encodedXmlString, boolean isDebugEnabled)
        throws UnsupportedEncodingException, DataFormatException {

    // URL decode
    // No need to URL decode: auto decoded by request.getParameter() method (GET)

    if (isDebugEnabled)
        nc.notice("Encoded XML String: " + encodedXmlString);

    // Base64 decode
    Base64 base64Decoder = new Base64();
    byte[] xmlBytes = encodedXmlString.getBytes("UTF-8");
    byte[] base64DecodedByteArray = base64Decoder.decode(xmlBytes);

    if (isDebugEnabled)
        nc.notice("Base64 decoded bytes: " + new String(base64DecodedByteArray, "UTF-8"));

    // Inflate (uncompress) the AuthnRequest data
    // First attempt to unzip the byte array according to DEFLATE (rfc 1951)
    Inflater inflater = new Inflater(true);
    inflater.setInput(base64DecodedByteArray);
    // since we are decompressing, it's impossible to know how much space we
    // might need; hopefully this number is suitably big
    byte[] xmlMessageBytes = new byte[5000];
    int resultLength = inflater.inflate(xmlMessageBytes);

    if (!inflater.finished()) {
        throw new RuntimeException("didn't allocate enough space to hold " + "decompressed data");
    }//from   w  w w  .j  av a 2s .  com

    inflater.end();

    String decodedString = new String(xmlMessageBytes, 0, resultLength, "UTF-8");

    if (isDebugEnabled)
        nc.notice("Decoded and inflated string (UTF-8): " + new String(base64DecodedByteArray));

    return decodedString;
}

---

From source file:org.wso2.carbon.identity.authenticator.saml2.sso.ui.Util.java

/**
 * Decoding and deflating the encoded AuthReq
 *
 * @param encodedStr encoded AuthReq/*  w  w  w  .  j a va2  s  .  c o m*/
 * @return decoded AuthReq
 */
public static String decode(String encodedStr) throws SAML2SSOUIAuthenticatorException {
    try {
        org.apache.commons.codec.binary.Base64 base64Decoder = new org.apache.commons.codec.binary.Base64();
        byte[] xmlBytes = encodedStr.getBytes("UTF-8");
        byte[] base64DecodedByteArray = base64Decoder.decode(xmlBytes);

        try {
            Inflater inflater = new Inflater(true);
            inflater.setInput(base64DecodedByteArray);
            byte[] xmlMessageBytes = new byte[5000];
            int resultLength = inflater.inflate(xmlMessageBytes);

            if (inflater.getRemaining() > 0) {
                throw new RuntimeException("didn't allocate enough space to hold " + "decompressed data");
            }

            inflater.end();
            return new String(xmlMessageBytes, 0, resultLength, "UTF-8");

        } catch (DataFormatException e) {
            ByteArrayInputStream bais = new ByteArrayInputStream(base64DecodedByteArray);
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            InflaterInputStream iis = new InflaterInputStream(bais);
            byte[] buf = new byte[1024];
            int count = iis.read(buf);
            while (count != -1) {
                baos.write(buf, 0, count);
                count = iis.read(buf);
            }
            iis.close();
            String decodedStr = new String(baos.toByteArray());
            return decodedStr;
        }
    } catch (IOException e) {
        throw new SAML2SSOUIAuthenticatorException("Error when decoding the SAML Request.", e);
    }

}

---

From source file:com.qatickets.common.ZIPHelper.java

public static byte[] decompressAsBytes(byte[] data) {

    if (data == null) {
        return null;
    }// w ww.  j  av  a 2  s. c  om

    // Create the decompressor and give it the data to compress
    final Inflater decompressor = new Inflater();
    decompressor.setInput(data);

    // Create an expandable byte array to hold the decompressed data
    final ByteArrayOutputStream bos = new ByteArrayOutputStream(data.length);

    // Decompress the data
    final byte[] buf = new byte[1024];
    while (!decompressor.finished()) {
        try {
            final int count = decompressor.inflate(buf);
            bos.write(buf, 0, count);
        } catch (DataFormatException e) {
        }
    }
    try {
        bos.close();
    } catch (IOException e) {
    }

    // Get the decompressed data
    final byte[] decompressedData = bos.toByteArray();

    decompressor.end();

    return decompressedData;
}

---

From source file:com.simiacryptus.text.CompressionUtil.java

/**
 * Decode lz byte [ ].//w w  w.j  a v  a 2  s.  c  o  m
 *
 * @param data       the data
 * @param dictionary the dictionary
 * @return the byte [ ]
 */
public static byte[] decodeLZ(byte[] data, String dictionary) {
    try {
        Inflater decompresser = new Inflater();
        decompresser.setInput(data, 0, data.length);
        byte[] result = new byte[data.length * 32];
        int resultLength = 0;
        if (!dictionary.isEmpty()) {
            resultLength = decompresser.inflate(result);
            assert (0 == resultLength);
            if (decompresser.needsDictionary()) {
                byte[] bytes = dictionary.getBytes("UTF-8");
                decompresser.setDictionary(bytes);
            }
        }
        resultLength = decompresser.inflate(result);
        decompresser.end();
        return Arrays.copyOfRange(result, 0, resultLength);
    } catch (DataFormatException | UnsupportedEncodingException e) {
        throw new RuntimeException(e);
    }
}

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