/**
* GzipDecompressingEntity
* Copyright 2010 by Sebastian Gaebel
* First released 01.07.2010 at http://yacy.net
*
* $LastChangedDate: 2011-03-08 02:51:51 +0100 (Di, 08. Mär 2011) $
* $LastChangedRevision: 7567 $
* $LastChangedBy: low012 $
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program in the file lgpl21.txt
* If not, see <http://www.gnu.org/licenses/>.
*/
package net.yacy.cora.protocol.http;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.util.zip.GZIPInputStream;
import org.apache.http.HttpEntity;
import org.apache.http.entity.HttpEntityWrapper;
public class GzipDecompressingEntity extends HttpEntityWrapper {
private static final int DEFAULT_BUFFER_SIZE = 1024; // this is also the maximum chunk size
private GZIPInputStream gzipInputStream = null;
public GzipDecompressingEntity(final HttpEntity entity) {
super(entity);
}
public InputStream getContent() throws IOException, IllegalStateException {
if (gzipInputStream == null) {
gzipInputStream = new GZIPInputStream(wrappedEntity.getContent());
}
return gzipInputStream;
}
public void writeTo(OutputStream outstream) throws IOException {
if (outstream == null) {
throw new IllegalArgumentException("Output stream may not be null");
}
InputStream instream = this.getContent();
try {
int l;
byte[] tmp = new byte[DEFAULT_BUFFER_SIZE];
while ((l = instream.read(tmp)) != -1) {
outstream.write(tmp, 0, l);
}
} finally {
instream.close();
}
}
public boolean isChunked() {
return true;
}
public long getContentLength() {
// length of ungzipped content not known in advance
return -1;
}
}