/*
* Copyright 2013 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;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToMessageDecoder;
import java.util.List;
abstract class WebSocketProtocolHandler extends MessageToMessageDecoder<WebSocketFrame> {
private final boolean dropPongFrames;
/**
* Creates a new {@link WebSocketProtocolHandler} that will <i>drop</i> {@link PongWebSocketFrame}s.
*/
WebSocketProtocolHandler() {
this(true);
}
/**
* Creates a new {@link WebSocketProtocolHandler}, given a parameter that determines whether or not to drop {@link
* PongWebSocketFrame}s.
*
* @param dropPongFrames
* {@code true} if {@link PongWebSocketFrame}s should be dropped
*/
WebSocketProtocolHandler(boolean dropPongFrames) {
this.dropPongFrames = dropPongFrames;
}
@Override
protected void decode(ChannelHandlerContextctx, WebSocketFrameframe, List<Object> out) throws Exception {
if (frame instanceof PingWebSocketFrame) {
frame.content().retain();
ctx.channel().writeAndFlush(new PongWebSocketFrame(frame.content()));
return;
}
if (frame instanceof PongWebSocketFrame && dropPongFrames) {
return;
}
out.add(frame.retain());
}
@Override
public void exceptionCaught(ChannelHandlerContextctx, Throwablecause) throws Exception {
ctx.fireExceptionCaught(cause);
ctx.close();
}
}