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package org.openslx.util;
import org.kamranzafar.jtar.TarEntry;
import org.kamranzafar.jtar.TarHeader;
import org.kamranzafar.jtar.TarInputStream;
import org.kamranzafar.jtar.TarOutputStream;
import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.nio.charset.StandardCharsets;
import java.util.zip.GZIPInputStream;
import java.util.zip.GZIPOutputStream;
public class TarArchiveUtil {
private TarArchiveUtil() {}
public static class TarArchiveReader implements AutoCloseable {
private boolean isCompressed;
private final TarInputStream tarInputStream;
private TarEntry currentEntry = null;
public TarArchiveReader(InputStream in) throws IOException {
this(in,true,false);
}
public TarArchiveReader(InputStream in, boolean isBuffered, boolean isCompressed) throws IOException {
this.isCompressed = isCompressed;
InputStream stream = in;
if (isBuffered) {
stream = new BufferedInputStream(stream);
}
if (isCompressed) {
stream = new GZIPInputStream(stream);
}
this.tarInputStream = new TarInputStream(stream);
}
public boolean hasNextEntry() throws IOException {
this.currentEntry = this.tarInputStream.getNextEntry();
if (this.currentEntry != null) {
return true;
} else {
return false;
}
}
public String getEntryName() {
return this.currentEntry.getName();
}
public byte[] readCurrentEntry() throws IOException {
ByteArrayOutputStream output = new ByteArrayOutputStream();
byte[] rawData = new byte[1024];
int count = 0;
while ((count = this.tarInputStream.read(rawData)) != -1) {
output.write(rawData, 0, count);
}
return output.toByteArray();
}
@Override
public void close() throws IOException {
tarInputStream.close();
}
}
public static class TarArchiveWriter implements AutoCloseable
{
private boolean isBuffered;
private boolean isCompressed;
private final TarOutputStream tarOutputStream;
public TarArchiveWriter (OutputStream out) throws IOException {
this(out, true, true);
}
public TarArchiveWriter (OutputStream out, boolean isBuffered, boolean isCompressed) throws IOException {
this.isBuffered = isBuffered;
this.isCompressed = isCompressed;
OutputStream stream = out;
if (isBuffered) {
stream = new BufferedOutputStream(stream);
}
if (isCompressed) {
stream = new GZIPOutputStream(stream);
}
this.tarOutputStream = new TarOutputStream(stream);
}
public void writeFile(String filename, String data) throws IOException {
if (data == null)
return;
putFile(filename, data.getBytes(StandardCharsets.UTF_8));
}
public void writeFile(String filename, byte[] data) throws IOException {
if (data == null)
return;
putFile(filename, data);
}
private void putFile(String filename, byte[] data) throws IOException {
if (data == null)
return;
tarOutputStream.putNextEntry(new TarEntry(TarHeader.createHeader(filename,
data.length, Util.unixTime(), false, 0644)));
tarOutputStream.write(data);
}
@Override
public void close() throws Exception {
tarOutputStream.close();
}
}
}
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