io.netty.handler.codec.http.websocketx.extensions.compression.PerFrameDeflateDecoder Maven / Gradle / Ivy
/*
* Copyright 2014 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 io.netty.handler.codec.http.websocketx.extensions.compression;
import io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
import io.netty.handler.codec.http.websocketx.ContinuationWebSocketFrame;
import io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import io.netty.handler.codec.http.websocketx.WebSocketFrame;
import io.netty.handler.codec.http.websocketx.extensions.WebSocketExtension;
/**
* Per-frame implementation of deflate decompressor.
*/
class PerFrameDeflateDecoder extends DeflateDecoder {
/**
* Constructor
* @param noContext true to disable context takeover.
*/
public PerFrameDeflateDecoder(boolean noContext) {
super(noContext);
}
@Override
public boolean acceptInboundMessage(Object msg) throws Exception {
return (msg instanceof TextWebSocketFrame ||
msg instanceof BinaryWebSocketFrame ||
msg instanceof ContinuationWebSocketFrame) &&
(((WebSocketFrame) msg).rsv() & WebSocketExtension.RSV1) > 0;
}
@Override
protected int newRsv(WebSocketFrame msg) {
return msg.rsv() ^ WebSocketExtension.RSV1;
}
@Override
protected boolean appendFrameTail(WebSocketFrame msg) {
return true;
}
}