74 lines
2.3 KiB
Java
74 lines
2.3 KiB
Java
/*
|
|
* 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(ChannelHandlerContext ctx, WebSocketFrame frame) throws Exception {
|
|
if (frame instanceof PingWebSocketFrame) {
|
|
frame.content().retain();
|
|
ctx.channel().writeAndFlush(new PongWebSocketFrame(frame.content()));
|
|
readIfNeeded(ctx);
|
|
return;
|
|
}
|
|
if (frame instanceof PongWebSocketFrame && dropPongFrames) {
|
|
readIfNeeded(ctx);
|
|
return;
|
|
}
|
|
|
|
ctx.fireChannelRead(frame.retain());
|
|
}
|
|
|
|
private static void readIfNeeded(ChannelHandlerContext ctx) {
|
|
if (!ctx.channel().config().isAutoRead()) {
|
|
ctx.read();
|
|
}
|
|
}
|
|
|
|
@Override
|
|
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
|
|
ctx.fireExceptionCaught(cause);
|
|
ctx.close();
|
|
}
|
|
}
|