/*
* Copyright 2012 The Netty Project
*
* The Netty Project licenses this file to you under the Apache License,
* version 2.0 (the "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*/
package org.jboss.netty.handler.codec.spdy;
import java.util.zip.DataFormatException;
import java.util.zip.Inflater;
import org.jboss.netty.buffer.ChannelBuffer;
import static org.jboss.netty.handler.codec.spdy.SpdyCodecUtil.*;
class SpdyHeaderBlockZlibDecompressor extends SpdyHeaderBlockDecompressor {
private final byte[] out = new byte[8192];
private final Inflater decompressor = new Inflater();
@Override
public void setInput(ChannelBuffer compressed) {
byte[] in = new byte[compressed.readableBytes()];
compressed.readBytes(in);
decompressor.setInput(in);
}
@Override
public void decode(ChannelBuffer decompressed) throws Exception {
try {
int numBytes = decompressor.inflate(out);
if (numBytes == 0 && decompressor.needsDictionary()) {
decompressor.setDictionary(SPDY_DICT);
numBytes = decompressor.inflate(out);
}
decompressed.writeBytes(out, 0, numBytes);
} catch (DataFormatException e) {
throw new SpdyProtocolException(
"Received invalid header block", e);
}
}
@Override
public void end() {
decompressor.end();
}
}