/* * 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> { @Override protected void decode(ChannelHandlerContext ctx, WebSocketFrame frame, List<Object> out) throws Exception { if (frame instanceof PingWebSocketFrame) { frame.content().retain(); ctx.channel().writeAndFlush(new PongWebSocketFrame(frame.content())); return; } if (frame instanceof PongWebSocketFrame) { // Pong frames need to get ignored return; } out.add(frame.retain()); } @Override public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception { ctx.close(); } }