19d1f4ea62
Motivation: Currently, on recipt of a PongWebSocketFrame, the WebSocketProtocolHandler will drop the frame, rather than passing it along so it can be referenced by other handlers. Modifications: Add boolean field to WebSocketProtocolHandler to indicate whether Pong frames should be dropped or propagated, defaulting to "true" to preserve existing functionality. Add new constructors to the client and server implementations of WebSocketProtocolHandler that allow for overriding the behavior for the handling of Pong frames. Result: PongWebSocketFrames are passed along the channel, if specified.
66 lines
2.1 KiB
Java
66 lines
2.1 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, 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(ChannelHandlerContext ctx, Throwable cause) throws Exception {
|
|
ctx.fireExceptionCaught(cause);
|
|
ctx.close();
|
|
}
|
|
}
|