Example usage for java.util.zip GZIPInputStream read

Introduction

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

Prototype

public int read(byte b[]) throws IOException 

Source Link

Document

Reads up to b.length bytes of data from this input stream into an array of bytes.

Usage

From source file:updater.builder.SoftwarePatchBuilder.java

public static void catalog(CommandLine line, Options options) throws ParseException, Exception {
    if (!line.hasOption("key")) {
        throw new Exception("Please specify the key file to use using --key");
    }/*  ww  w .ja va 2 s . c  om*/
    if (!line.hasOption("output")) {
        throw new Exception("Please specify the path to output the XML file using --output");
    }

    String[] catalogArgs = line.getOptionValues("catalog");
    String keyArg = line.getOptionValue("key");
    String outputArg = line.getOptionValue("output");

    if (catalogArgs.length != 2) {
        throw new ParseException("Wrong arguments for 'catalog', expecting 2 arguments");
    }
    if (!catalogArgs[0].equals("e") && !catalogArgs[0].equals("d")) {
        throw new ParseException("Catalog mode should be either 'e' or 'd' but not " + catalogArgs[0]);
    }

    RSAKey rsaKey = RSAKey.read(Util.readFile(new File(keyArg)));

    System.out.println("Mode: " + (catalogArgs[0].equals("e") ? "encrypt" : "decrypt"));
    System.out.println("Catalog file: " + catalogArgs[1]);
    System.out.println("Key file: " + keyArg);
    System.out.println("Output file: " + outputArg);
    System.out.println();

    File in = new File(catalogArgs[1]);
    File out = new File(outputArg);
    BigInteger mod = new BigInteger(rsaKey.getModulus());

    if (catalogArgs[0].equals("e")) {
        BigInteger privateExp = new BigInteger(rsaKey.getPrivateExponent());

        RSAPrivateKey privateKey = CommonUtil.getPrivateKey(mod, privateExp);

        // compress
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        GZIPOutputStream gout = new GZIPOutputStream(bout);
        gout.write(Util.readFile(in));
        gout.finish();
        byte[] compressedData = bout.toByteArray();

        // encrypt
        int blockSize = mod.bitLength() / 8;
        byte[] encrypted = Util.rsaEncrypt(privateKey, blockSize, blockSize - 11, compressedData);

        // write to file
        Util.writeFile(out, encrypted);
    } else {
        BigInteger publicExp = new BigInteger(rsaKey.getPublicExponent());
        RSAPublicKey publicKey = CommonUtil.getPublicKey(mod, publicExp);

        // decrypt
        int blockSize = mod.bitLength() / 8;
        byte[] decrypted = Util.rsaDecrypt(publicKey, blockSize, Util.readFile(in));

        // decompress
        ByteArrayOutputStream bout = new ByteArrayOutputStream();
        ByteArrayInputStream bin = new ByteArrayInputStream(decrypted);
        GZIPInputStream gin = new GZIPInputStream(bin);

        int byteRead;
        byte[] b = new byte[1024];
        while ((byteRead = gin.read(b)) != -1) {
            bout.write(b, 0, byteRead);
        }
        byte[] decompressedData = bout.toByteArray();

        // write to file
        Util.writeFile(out, decompressedData);
    }

    System.out.println("Manipulation succeed.");
}

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From source file:org.apache.myfaces.shared_ext202patch.util.StateUtils.java

public static final byte[] decompress(byte[] bytes) {
    if (bytes == null)
        throw new NullPointerException("byte[] bytes");

    ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buffer = new byte[bytes.length];
    int length;/*from   ww w.  java 2  s  . c  o m*/

    try {
        GZIPInputStream gis = new GZIPInputStream(bais);
        while ((length = gis.read(buffer)) != -1) {
            baos.write(buffer, 0, length);
        }

        byte[] moreBytes = baos.toByteArray();
        baos.close();
        bais.close();
        gis.close();
        baos = null;
        bais = null;
        gis = null;
        return moreBytes;
    } catch (IOException e) {
        throw new FacesException(e);
    }
}

---

From source file:org.apache.myfaces.shared.util.StateUtils.java

public static final byte[] decompress(byte[] bytes) {
    if (bytes == null) {
        throw new NullPointerException("byte[] bytes");
    }/*  w w w.  j  av  a  2  s. c  om*/

    ByteArrayInputStream bais = new ByteArrayInputStream(bytes);
    ByteArrayOutputStream baos = new ByteArrayOutputStream();
    byte[] buffer = new byte[bytes.length];
    int length;

    try {
        GZIPInputStream gis = new GZIPInputStream(bais);
        while ((length = gis.read(buffer)) != -1) {
            baos.write(buffer, 0, length);
        }

        byte[] moreBytes = baos.toByteArray();
        baos.close();
        bais.close();
        gis.close();
        baos = null;
        bais = null;
        gis = null;
        return moreBytes;
    } catch (IOException e) {
        throw new FacesException(e);
    }
}

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From source file:org.gephi.io.importer.api.ImportUtils.java

/**
 * Uncompress a GZIP file./*from   w  w w.  jav  a 2  s  .co m*/
 */
public static File getGzFile(FileObject in, File out, boolean isTar) throws IOException {

    // Stream buffer
    final int BUFF_SIZE = 8192;
    final byte[] buffer = new byte[BUFF_SIZE];

    GZIPInputStream inputStream = null;
    FileOutputStream outStream = null;

    try {
        inputStream = new GZIPInputStream(new FileInputStream(in.getPath()));
        outStream = new FileOutputStream(out);

        if (isTar) {
            // Read Tar header
            int remainingBytes = readTarHeader(inputStream);

            // Read content
            ByteBuffer bb = ByteBuffer.allocateDirect(4 * BUFF_SIZE);
            byte[] tmpCache = new byte[BUFF_SIZE];
            int nRead, nGet;
            while ((nRead = inputStream.read(tmpCache)) != -1) {
                if (nRead == 0) {
                    continue;
                }
                bb.put(tmpCache);
                bb.position(0);
                bb.limit(nRead);
                while (bb.hasRemaining() && remainingBytes > 0) {
                    nGet = Math.min(bb.remaining(), BUFF_SIZE);
                    nGet = Math.min(nGet, remainingBytes);
                    bb.get(buffer, 0, nGet);
                    outStream.write(buffer, 0, nGet);
                    remainingBytes -= nGet;
                }
                bb.clear();
            }
        } else {
            int len;
            while ((len = inputStream.read(buffer)) > 0) {
                outStream.write(buffer, 0, len);
            }
        }
    } catch (IOException ex) {
        Exceptions.printStackTrace(ex);
    } finally {
        if (inputStream != null) {
            inputStream.close();
        }
        if (outStream != null) {
            outStream.close();
        }
    }

    return out;
}

---

From source file:backtype.storm.utils.Utils.java

public static byte[] gunzip(byte[] data) {
    try {//  w  ww.  j  a  v  a 2  s . co  m
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        ByteArrayInputStream bis = new ByteArrayInputStream(data);
        GZIPInputStream in = new GZIPInputStream(bis);
        byte[] buffer = new byte[1024];
        int len = 0;
        while ((len = in.read(buffer)) >= 0) {
            bos.write(buffer, 0, len);
        }
        in.close();
        bos.close();
        return bos.toByteArray();
    } catch (IOException e) {
        throw new RuntimeException(e);
    }
}

---

From source file:org.alder.fotobuchconvert.ifolor.Decryptor.java

private byte[] loadCompressedBinaryData(InputStream is) throws IOException, UnsupportedEncodingException {

    ByteArrayOutputStream output = new ByteArrayOutputStream();
    byte[] buffer = new byte[4096];

    int bytesRead;
    // load md5 sum
    MessageDigest md;/*  w  w  w .  j a va  2 s  . com*/
    try {
        md = MessageDigest.getInstance(DIGEST_MD52);
    } catch (NoSuchAlgorithmException e) {
        throw new RuntimeException(e);
    }
    byte[] md5 = new byte[md.getDigestLength()];
    bytesRead = is.read(md5, 0, md5.length);
    if (bytesRead != md.getDigestLength())
        throw new IOException(UNEXPECTED_END_OF_FILE);

    // load size
    bytesRead = is.read(buffer, 0, 4);
    if (bytesRead != 4)
        throw new IOException(UNEXPECTED_END_OF_FILE);
    int dataSize = (((int) buffer[3] & 0xFF) << 24) | (((int) buffer[2] & 0xFF) << 16)
            | (((int) buffer[1] & 0xFF) << 8) | ((int) buffer[0] & 0xFF);
    log.debug("uncompressed file size: " + dataSize);

    GZIPInputStream gzipIs = new GZIPInputStream(is);
    while ((bytesRead = gzipIs.read(buffer)) != -1) {
        md.update(buffer, 0, bytesRead);
        output.write(buffer, 0, bytesRead);
        if (dumpData)
            System.out.print(new String(buffer, 0, bytesRead, CHARSET_cp1252));
    }
    if (dumpData)
        System.out.println();

    buffer = md.digest();
    for (int i = 0; i < buffer.length; i++)
        if (buffer[i] != md5[i])
            throw new IOException("MD5 mismatch");

    if (output.size() != dataSize)
        throw new IOException(String.format("File size mismatch: %d instead of %d", output.size(), dataSize));

    log.debug("MD5 ok");

    return output.toByteArray();
}

---

From source file:ca.farrelltonsolar.classic.PVOutputUploader.java

private Bundle deserializeBundle(byte[] data) {
    Bundle bundle = null;//from ww  w .j a  va  2s  .com
    final Parcel parcel = Parcel.obtain();
    try {
        final ByteArrayOutputStream byteBuffer = new ByteArrayOutputStream();
        final byte[] buffer = new byte[1024];
        final GZIPInputStream zis = new GZIPInputStream(new ByteArrayInputStream(data));
        int len = 0;
        while ((len = zis.read(buffer)) != -1) {
            byteBuffer.write(buffer, 0, len);
        }
        zis.close();
        parcel.unmarshall(byteBuffer.toByteArray(), 0, byteBuffer.size());
        parcel.setDataPosition(0);
        bundle = parcel.readBundle();
    } catch (IOException ex) {
        Log.w(getClass().getName(), String.format("deserializeBundle failed ex: %s", ex));
        bundle = null;
    } finally {
        parcel.recycle();
    }
    return bundle;
}

---

From source file:org.physical_web.physicalweb.Utils.java

/**
 * Out-of-place Gunzips from src to dest.
 * @param src file containing gzipped information.
 * @param dest file to place decompressed information.
 * @return File that has decompressed information.
 *//* www . j a v a 2  s.  c  om*/
public static File gunzip(File src, File dest) {

    byte[] buffer = new byte[1024];

    try {

        GZIPInputStream gzis = new GZIPInputStream(new FileInputStream(src));

        FileOutputStream out = new FileOutputStream(dest);

        int len;
        while ((len = gzis.read(buffer)) > 0) {
            out.write(buffer, 0, len);
        }

        gzis.close();
        out.close();

    } catch (IOException ex) {
        ex.printStackTrace();
    }
    return dest;
}

---

From source file:sequential.analysis.SequentialAnalysis.java

public void unGunzipFile(String compressedFile, String decompressedFile) {
    byte[] buffer = new byte[1024];
    try {/*from  www. j  ava 2  s .c  om*/
        FileInputStream fileIn = new FileInputStream(compressedFile);
        GZIPInputStream gZIPInputStream = new GZIPInputStream(fileIn);
        FileOutputStream fileOutputStream = new FileOutputStream(decompressedFile);
        int bytes_read;
        while ((bytes_read = gZIPInputStream.read(buffer)) > 0) {
            fileOutputStream.write(buffer, 0, bytes_read);
        }
        gZIPInputStream.close();
        fileOutputStream.close();
        getCsvData(decompressedFile);
        System.out.println("Success!");
    } catch (IOException ex) {
        ex.printStackTrace();
    }

}

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From source file:org.tuckey.web.filters.urlrewriteviacontainer.WebappHttpIT.java

/**
 * inflate a gzipped inputstream and return it as a string.
 *///from   w  w w.  j a  v  a2  s.c  o  m
private String inflateGzipToString(InputStream is) throws IOException {
    GZIPInputStream gis = new GZIPInputStream(is);
    ByteArrayOutputStream os = new ByteArrayOutputStream();
    byte[] buffer = new byte[1024];
    while (true) {
        int bytesRead = gis.read(buffer);
        if (bytesRead == -1)
            break;
        os.write(buffer, 0, bytesRead);
    }
    return os.toString();
}

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