Example usage for java.util.zip InflaterInputStream InflaterInputStream

Introduction

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

Prototype

public InflaterInputStream(InputStream in, Inflater inf) 

Source Link

Document

Creates a new input stream with the specified decompressor and a default buffer size.

Usage

From source file:Main.java

public static InputStream getInputEncoding(URLConnection connection) throws IOException {
    InputStream in;/*w  w  w  . jav a 2 s. c  o  m*/
    String encoding = connection.getContentEncoding();
    if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
        in = new GZIPInputStream(connection.getInputStream());
    } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
        in = new InflaterInputStream(connection.getInputStream(), new Inflater(true));
    } else {
        in = connection.getInputStream();
    }
    return in;
}

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From source file:Main.java

static String downloadHtml(String urlString) {
    StringBuffer buffer = new StringBuffer();

    try {/*from  ww  w.  j a v  a 2 s.  co  m*/
        URL url = new URL(urlString);
        HttpURLConnection conn = (HttpURLConnection) url.openConnection();
        HttpURLConnection.setFollowRedirects(true);
        conn.setRequestProperty("Accept-Encoding", "gzip, deflate");
        String encoding = conn.getContentEncoding();
        InputStream inStr = null;

        if (encoding != null && encoding.equalsIgnoreCase("gzip")) {
            inStr = new GZIPInputStream(conn.getInputStream());
        } else if (encoding != null && encoding.equalsIgnoreCase("deflate")) {
            inStr = new InflaterInputStream(conn.getInputStream(), new Inflater(true));
        } else {
            inStr = conn.getInputStream();
        }
        int ptr = 0;
        InputStreamReader inStrReader = new InputStreamReader(inStr, Charset.forName("GB2312"));

        while ((ptr = inStrReader.read()) != -1) {
            buffer.append((char) ptr);
        }
        inStrReader.close();
        conn.disconnect();
        inStr.close();
    } catch (Exception e) {
        e.printStackTrace();
    }
    return buffer.toString();
}

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From source file:org.openmrs.module.shr.contenthandler.DataUtil.java

public static byte[] uncompressDeflate(byte[] content) throws IOException {
    InflaterInputStream deflateIn = new InflaterInputStream(new ByteArrayInputStream(content),
            new Inflater(true));
    return copyToByteArray(deflateIn);
}

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From source file:com.barrybecker4.common.util.Base64Codec.java

/**
 * Take a String and decompress it.//from  w w w  .  j a  v a  2s.c om
 * @param data the compressed string to decompress.
 * @return the decompressed string.
 */
public static synchronized String decompress(final String data) {

    // convert from string to bytes for decompressing
    byte[] compressedDat = Base64.decodeBase64(data.getBytes());

    final ByteArrayInputStream in = new ByteArrayInputStream(compressedDat);
    final Inflater inflater = new Inflater();
    final InflaterInputStream iStream = new InflaterInputStream(in, inflater);
    final char cBuffer[] = new char[4096];
    StringBuilder sBuf = new StringBuilder();
    try {
        InputStreamReader iReader = new InputStreamReader(iStream, CONVERTER_UTF8);
        while (true) {
            final int numRead = iReader.read(cBuffer);
            if (numRead == -1) {
                break;
            }
            sBuf.append(cBuffer, 0, numRead);
        }
    } catch (UnsupportedEncodingException e) {
        throw new IllegalArgumentException("Unsupported encoding exception :" + e.getMessage(), e);
    } catch (IOException e) {
        throw new IllegalStateException("io error :" + e.getMessage(), e);
    }

    return sBuf.toString();
}

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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  va  2  s.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  www  . ja v a 2 s .  com
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: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;//w  w w .  j a va2 s.com
    // 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: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;//  w  ww . j a  v a2s  . c om
    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:com.google.android.feeds.ContentHandlerUtils.java

/**
 * Returns the uncompressed {@link InputStream} for the given
 * {@link URLConnection}.//from w  ww  .  j  a  va  2 s.  c  om
 */
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:com.tremolosecurity.unison.u2f.util.U2fUtil.java

private static String inflate(String saml) throws Exception {
    byte[] compressedData = Base64.decodeBase64(saml);
    ByteArrayInputStream bin = new ByteArrayInputStream(compressedData);

    InflaterInputStream decompressor = new InflaterInputStream(bin, new Inflater(true));
    //decompressor.setInput(compressedData);

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

    // Decompress the data
    byte[] buf = new byte[1024];
    int len;/*from   w w  w.  ja v a  2s  .  c  o  m*/
    while ((len = decompressor.read(buf)) > 0) {

        bos.write(buf, 0, len);

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

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

    String decoded = new String(decompressedData);

    return decoded;
}

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