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/**
* GzipCompressingEntity
* Copyright 2010 by Sebastian Gaebel
* First released 01.07.2010 at http://yacy.net
*
* $LastChangedDate$
* $LastChangedRevision$
* $LastChangedBy$
*
* 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.OutputStream;
import java.util.zip.Deflater;
import java.util.zip.GZIPOutputStream;
import net.yacy.cora.protocol.HeaderFramework;
import org.apache.http.Header;
import org.apache.http.HttpEntity;
import org.apache.http.entity.HttpEntityWrapper;
import org.apache.http.message.BasicHeader;
import org.apache.http.protocol.HTTP;
public class GzipCompressingEntity extends HttpEntityWrapper {
// private static final int DEFAULT_BUFFER_SIZE = 1024; // this is also the maximum chunk size
public GzipCompressingEntity(final HttpEntity entity) {
super(entity);
}
@Override
public Header getContentEncoding() {
return new BasicHeader(HTTP.CONTENT_ENCODING, HeaderFramework.CONTENT_ENCODING_GZIP);
}
@Override
public long getContentLength() {
return -1;
}
@Override
public boolean isChunked() {
// force content chunking
return true;
}
@Override
public void writeTo(final OutputStream outstream) throws IOException {
if (outstream == null) {
throw new IllegalArgumentException("Output stream may not be null");
}
GZIPOutputStream gzip = new GZIPOutputStream(outstream, 65536){{def.setLevel(Deflater.BEST_SPEED);}};
wrappedEntity.writeTo(gzip);
gzip.finish();
}
}
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