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107 lines
3.6 KiB
107 lines
3.6 KiB
// tarTools.java
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// (C) 2008 by David Wieditz; d.wieditz@gmx.de
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// first published 21.05.2008 on http://yacy.net
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//
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// This is a part of YaCy, a peer-to-peer based web search engine
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//
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// $LastChangedDate$
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// $LastChangedRevision$
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// $LastChangedBy$
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//
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// LICENSE
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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package net.yacy.utils;
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.io.InputStream;
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import java.util.zip.GZIPInputStream;
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import net.yacy.cora.util.ConcurrentLog;
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import org.apache.tools.tar.TarEntry;
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import org.apache.tools.tar.TarInputStream;
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public class tarTools {
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public static InputStream getInputStream(final String tarFileName) throws Exception{
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if (tarFileName.endsWith(".gz")) {
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try {
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return new GZIPInputStream(new FileInputStream(new File(tarFileName)));
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} catch (final IOException e) {
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// this might happen if the stream is not in gzip format.
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// there may be a 'gz' extension, but it may still be a raw tar file
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// this can be caused by 'one too much gzip-content header' that was attached
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// by a release file server, so just try to open is as normal stream
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return new FileInputStream(new File(tarFileName));
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}
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}
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return new FileInputStream(new File(tarFileName));
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}
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public static InputStream getInputStream(final File tarFileName) throws Exception{
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return getInputStream(tarFileName.toString());
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}
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/**
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* untar for any archive, overwrites existing data
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* @param in use getInputStream() for convenience
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* @param untarDir destination path
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* @throws Exception (IOException or FileNotFoundException)
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*/
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public static void unTar(final InputStream in, final String untarDir) throws Exception{
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ConcurrentLog.info("UNTAR", "starting");
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if(new File(untarDir).exists()){
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final TarInputStream tin = new TarInputStream(in);
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TarEntry tarEntry = tin.getNextEntry();
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while(tarEntry != null){
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final File destPath = new File(untarDir + File.separator + tarEntry.getName());
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if (!tarEntry.isDirectory()) {
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new File(destPath.getParent()).mkdirs(); // create missing subdirectories
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final FileOutputStream fout = new FileOutputStream(destPath);
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tin.copyEntryContents(fout);
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fout.close();
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} else {
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destPath.mkdir();
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}
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tarEntry = tin.getNextEntry();
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}
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tin.close();
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} else { // untarDir doesn't exist
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ConcurrentLog.warn("UNTAR", "destination " + untarDir + " doesn't exist.");
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}
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ConcurrentLog.info("UNTAR", "finished");
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}
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public static void main(final String args[]) {
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// @arg0 source
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// @arg1 destination
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if(args.length == 2){
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try {
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unTar(getInputStream(args[0]), args[1]);
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} catch (final Exception e) {
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System.out.println(e);
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}
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} else {
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System.out.println("usage: <source> <destination>");
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}
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}
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}
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