ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.compression.PerMessageDeflateDecoder Maven / Gradle / Ivy

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Pulls down netty.io, relocates nd then makes a fat new jar with them all in it.

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/*
 * 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 ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.compression;

import ch.cern.hbase.thirdparty.io.netty.channel.ChannelHandlerContext;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.BinaryWebSocketFrame;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.ContinuationWebSocketFrame;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.TextWebSocketFrame;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.WebSocketFrame;
import ch.cern.hbase.thirdparty.io.netty.handler.codec.http.websocketx.extensions.WebSocketExtension;

import java.util.List;

/**
 * Per-message implementation of deflate decompressor.
 */
class PerMessageDeflateDecoder extends DeflateDecoder {

    private boolean compressing;

    /**
     * Constructor
     * @param noContext true to disable context takeover.
     */
    PerMessageDeflateDecoder(boolean noContext) {
        super(noContext);
    }

    @Override
    public boolean acceptInboundMessage(Object msg) throws Exception {
        return ((msg instanceof TextWebSocketFrame ||
                 msg instanceof BinaryWebSocketFrame) &&
                    (((WebSocketFrame) msg).rsv() & WebSocketExtension.RSV1) > 0) ||
                (msg instanceof ContinuationWebSocketFrame && compressing);
    }

    @Override
    protected int newRsv(WebSocketFrame msg) {
        return (msg.rsv() & WebSocketExtension.RSV1) > 0 ?
                msg.rsv() ^ WebSocketExtension.RSV1 : msg.rsv();
    }

    @Override
    protected boolean appendFrameTail(WebSocketFrame msg) {
        return msg.isFinalFragment();
    }

    @Override
    protected void decode(ChannelHandlerContext ctx, WebSocketFrame msg,
        List