Example usage for java.util.zip Inflater Inflater

Introduction

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

Prototype

public Inflater(boolean nowrap) 

Source Link

Document

Creates a new decompressor.

Usage

From source file:com.iflytek.spider.util.DeflateUtils.java

/**
 * Returns an inflated copy of the input array, truncated to
 * <code>sizeLimit</code> bytes, if necessary.  If the deflated input
 * has been truncated or corrupted, a best-effort attempt is made to
 * inflate as much as possible.  If no data can be extracted
 * <code>null</code> is returned.
 *//*w  w w  .  ja  v a 2s. c om*/
public static final byte[] inflateBestEffort(byte[] in, int sizeLimit) {
    // decompress using InflaterInputStream 
    ByteArrayOutputStream outStream = new ByteArrayOutputStream(EXPECTED_COMPRESSION_RATIO * in.length);

    // "true" because HTTP does not provide zlib headers
    Inflater inflater = new Inflater(true);
    InflaterInputStream inStream = new InflaterInputStream(new ByteArrayInputStream(in), inflater);

    byte[] buf = new byte[BUF_SIZE];
    int written = 0;
    while (true) {
        try {
            int size = inStream.read(buf);
            if (size <= 0)
                break;
            if ((written + size) > sizeLimit) {
                outStream.write(buf, 0, sizeLimit - written);
                break;
            }
            outStream.write(buf, 0, size);
            written += size;
        } catch (Exception e) {
            LOG.info("Caught Exception in inflateBestEffort");
            e.printStackTrace(LogUtil.getWarnStream(LOG));
            break;
        }
    }
    try {
        outStream.close();
    } catch (IOException e) {
    }

    return outStream.toByteArray();
}

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From source file:com.faceye.feature.util.http.DeflateUtils.java

/**
 * Returns an inflated copy of the input array, truncated to
 * <code>sizeLimit</code> bytes, if necessary.  If the deflated input
 * has been truncated or corrupted, a best-effort attempt is made to
 * inflate as much as possible.  If no data can be extracted
 * <code>null</code> is returned.
 *//*from  w w w.jav  a2s.c o m*/
public static final byte[] inflateBestEffort(byte[] in, int sizeLimit) {
    // decompress using InflaterInputStream 
    ByteArrayOutputStream outStream = new ByteArrayOutputStream(EXPECTED_COMPRESSION_RATIO * in.length);

    // "true" because HTTP does not provide zlib headers
    Inflater inflater = new Inflater(true);
    InflaterInputStream inStream = new InflaterInputStream(new ByteArrayInputStream(in), inflater);

    byte[] buf = new byte[BUF_SIZE];
    int written = 0;
    while (true) {
        try {
            int size = inStream.read(buf);
            if (size <= 0)
                break;
            if ((written + size) > sizeLimit) {
                outStream.write(buf, 0, sizeLimit - written);
                break;
            }
            outStream.write(buf, 0, size);
            written += size;
        } catch (Exception e) {
            LOG.info("Caught Exception in inflateBestEffort", e);
            break;
        }
    }
    try {
        outStream.close();
    } catch (IOException e) {
    }

    return outStream.toByteArray();
}

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From source file:com.predic8.membrane.core.util.ByteUtil.java

public static byte[] getDecompressedData(byte[] compressedData) throws IOException {
    Inflater decompressor = new Inflater(true);
    decompressor.setInput(compressedData);

    byte[] buf = new byte[1024];

    List<Chunk> chunks = new ArrayList<Chunk>();

    while (!decompressor.finished()) {
        int count;
        try {/*w w  w. ja v a  2 s .com*/
            count = decompressor.inflate(buf);
        } catch (DataFormatException e) {
            throw new IOException(e);
        }
        if (buf.length == count) {
            Chunk chunk = new Chunk(buf);
            chunks.add(chunk);
        } else if (count < buf.length) {
            byte[] shortContent = new byte[count];
            for (int j = 0; j < count; j++) {
                shortContent[j] = buf[j];
            }
            Chunk chunk = new Chunk(shortContent);
            chunks.add(chunk);
        }
    }

    log.debug("Number of decompressed chunks: " + chunks.size());
    if (chunks.size() > 0) {

        ByteArrayOutputStream bos = new ByteArrayOutputStream();

        for (Chunk chunk : chunks) {
            chunk.write(bos);
        }

        try {
            bos.close();
        } catch (IOException e) {
        }
        return bos.toByteArray();
    }

    return null;
}

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From source file:org.wso2.carbon.identity.sso.saml.tomcat.agent.Util.java

/**
 * Decoding and deflating the encoded AuthReq
 *
 * @param encodedStr//from w  w w. ja v a  2 s. co  m
 *            encoded AuthReq
 * @return decoded AuthReq
 */
public static String decode(String encodedStr) throws SSOAgentException {
    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();
            return new String(baos.toByteArray());
        }
    } catch (IOException e) {
        throw new SSOAgentException("Error when decoding the SAML Request.", e);
    }
}

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From source file:com.hundsun.jresplus.web.nosession.cookie.HessianZipSerializer.java

public static Object decode(byte[] encodedValue) throws SerializationException {
    ByteArrayInputStream bais = new ByteArrayInputStream(encodedValue);
    Inflater inf = new Inflater(false);
    InflaterInputStream iis = new InflaterInputStream(bais, inf);
    Hessian2Input hi = null;/*from   w  w  w. j a  v a2 s  .c o  m*/
    try {
        hi = new Hessian2Input(iis);
        return hi.readObject();
    } catch (Exception e) {
        throw new SerializationException("Failed to parse data", e);
    } finally {
        if (hi != null) {
            try {
                hi.close();
            } catch (IOException e) {
            }
        }
        try {
            iis.close();
        } catch (IOException e) {
        }
        inf.end();
    }
}

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From source file:net.fenyo.mail4hotspot.service.Browser.java

public static String getHtml(final String target_url, final Cookie[] cookies) throws IOException {
    // log.debug("RETRIEVING_URL=" + target_url);
    final URL url = new URL(target_url);

    final HttpURLConnection conn = (HttpURLConnection) url.openConnection();
    //Proxy proxy = new Proxy(Proxy.Type.HTTP, new InetSocketAddress("10.69.60.6", 3128)); 
    // final HttpURLConnection conn = (HttpURLConnection) url.openConnection(proxy);

    //      HttpURLConnection.setFollowRedirects(true);
    // conn.setRequestProperty("User-agent", "my agent name");

    conn.setRequestProperty("Accept-Language", "en-US");

    //      conn.setRequestProperty(key, value);

    // allow both GZip and Deflate (ZLib) encodings
    conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
    final String encoding = conn.getContentEncoding();
    InputStream is = null;/*from   w  w w .j  a va 2  s  .  co  m*/
    // create the appropriate stream wrapper based on the encoding type
    if (encoding != null && encoding.equalsIgnoreCase("gzip"))
        is = new GZIPInputStream(conn.getInputStream());
    else if (encoding != null && encoding.equalsIgnoreCase("deflate"))
        is = new InflaterInputStream(conn.getInputStream(), new Inflater(true));
    else
        is = conn.getInputStream();

    final InputStreamReader reader = new InputStreamReader(new BufferedInputStream(is));

    final CharBuffer cb = CharBuffer.allocate(1024 * 1024);
    int ret;
    do {
        ret = reader.read(cb);
    } while (ret > 0);
    cb.flip();
    return cb.toString();
}

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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");
    }/* w  ww. ja  v  a  2 s. co m*/

    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;
}

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From source file:ZipUtil.java

/**
 * Inflates a previously deflated file.//from   ww w  .java  2s. c o  m
 */
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;
}

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From source file:com.google.android.feeds.ContentHandlerUtils.java

/**
 * Returns the uncompressed {@link InputStream} for the given
 * {@link URLConnection}./*from ww w  . j av a 2s. c o m*/
 */
public static InputStream getUncompressedInputStream(URLConnection connection) throws IOException {
    InputStream source = connection.getInputStream();
    String encoding = connection.getContentEncoding();
    if ("gzip".equalsIgnoreCase(encoding)) {
        return new GZIPInputStream(source);
    } else if ("deflate".equalsIgnoreCase(encoding)) {
        boolean noHeader = true;
        Inflater inflater = new Inflater(noHeader);
        return new InflaterInputStream(source, inflater);
    } else {
        return source;
    }
}

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From source file:v7db.files.Compression.java

/**
 * assumes that the result buffer has exactly the needed size
 * /*  ww w  . ja v  a  2s .  co  m*/
 * @throws DataFormatException
 */
static void inflate(byte[] data, int off, int len, byte[] out) throws DataFormatException {
    Inflater inflater = new Inflater(true);
    inflater.setInput(data, off, len);
    int size = inflater.inflate(out);
    if (size != out.length)
        throw new DataFormatException(
                "unexpected size of deflated data: " + size + " instead of " + out.length);
}

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