netty5 MessagePack自定义协议 问题
1 自定义协议
Headers {
//目标类
private byte cls;
//效验码
private byte msgCrc = 0x01;
//全局回话id
private long msgSessionId;
//消息长度，包括头部
private int msgLength;
//消息类型
private byte msgType;
}
Messages {
Headers ;
Object ;
Object getBody() {
;
}
}
2 encoder
Encoder MessageToByteEncoder<Messages> {
MessagePack ;
[] ;
encode(ChannelHandlerContext ctx, Messages msgs, ByteBuf out) Exception {
= MessagePack();
(msgs == || msgs.getHeaders() == ) {
Exception();
}
= .write(msgs.getBody());
out.writeByte(msgs.getHeaders().getMsgCrc());
out.writeByte(msgs.getHeaders().getCls());
out.writeInt(.);
out.writeByte(msgs.getHeaders().getMsgType());
(msgs.getBody() != ) {
out.writeBytes();
}
}
}
3 decoder
Decoder ByteToMessageDecoder {
Logger = LoggerFactory.(.getClass().getName());
MessagePack ;
Messages ;
Headers ;
Class ;
decode(ChannelHandlerContext ctx, ByteBuf in, List<Object> out) Exception {
= MessagePack();
= Messages();
= Headers();
msgCrc = in.readByte();
cl = in.readByte();
lg = in.readInt();
(msgCrc != Tools.) {
.debug();
;
}
(in.readableBytes() < lg) {
in.resetReaderIndex();
;
}
in.markReaderIndex();
.setMsgCrc(msgCrc);
.setCls(cl);
.setMsgLength(lg);
.setMsgType(in.readByte());
(cl == ) {
= DictClass.;
}
[] array;
length = in.readableBytes();
array = [length];
in.getBytes(in.readerIndex(), array, , length);
.setBody(.read(array, ));
.setHeaders();
out.add();
}
}
4 server
ChildChannelHander ChannelInitializer<SocketChannel> {
initChannel(SocketChannel ch) Exception {
ch.pipeline().addLast(Encoder());
ch.pipeline().addLast(Decoder());
ch.pipeline().addLast(FlowerpotLoginServiceHandlers());
.debug();
}
}
5 client
(ChannelInitializer<SocketChannel>() {
initChannel(SocketChannel ch) Exception {
ch.pipeline().addLast(Encoder());
ch.pipeline().addLast(Decoder());
ch.pipeline().addLast(FlowerpotLoginClientHandlers());
.debug();
}
}
错误信息:
15:04:22.650 [nioEventLoopGroup-1-6] WARN i.n.channel.DefaultChannelPipeline - An exceptionCaught() event was fired, and it reached at the tail of the pipeline. It usually means the last handler in the pipeline did not handle the exception.
io.netty.handler.codec.DecoderException: java.lang.IndexOutOfBoundsException: readerIndex(34) + length(1) exceeds writerIndex(34): PooledUnsafeDirectByteBuf(ridx: 34, widx: 34, cap: 34)
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:347) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:272) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.ChannelHandlerInvokerUtil.invokeChannelInactiveNow(ChannelHandlerInvokerUtil.java:56) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.DefaultChannelHandlerInvoker.invokeChannelInactive(DefaultChannelHandlerInvoker.java:92) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.PausableChannelEventExecutor.invokeChannelInactive(PausableChannelEventExecutor.java:71) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:366) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.handler.codec.ByteToMessageDecoder.channelInactive(ByteToMessageDecoder.java:295) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.ChannelHandlerInvokerUtil.invokeChannelInactiveNow(ChannelHandlerInvokerUtil.java:56) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.DefaultChannelHandlerInvoker.invokeChannelInactive(DefaultChannelHandlerInvoker.java:92) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.PausableChannelEventExecutor.invokeChannelInactive(PausableChannelEventExecutor.java:71) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelInactive(AbstractChannelHandlerContext.java:366) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.DefaultChannelPipeline.fireChannelInactive(DefaultChannelPipeline.java:938) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.AbstractChannel$AbstractUnsafe$7.run(AbstractChannel.java:680) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:328) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.internal.chmv8.ForkJoinTask$RunnableExecuteAction.exec(ForkJoinTask.java:1412) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.internal.chmv8.ForkJoinTask.doExec(ForkJoinTask.java:280) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.internal.chmv8.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:877) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.internal.chmv8.ForkJoinPool.scan(ForkJoinPool.java:1706) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.internal.chmv8.ForkJoinPool.runWorker(ForkJoinPool.java:1661) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.util.internal.chmv8.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:126) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
Caused by: java.lang.IndexOutOfBoundsException: readerIndex(34) + length(1) exceeds writerIndex(34): PooledUnsafeDirectByteBuf(ridx: 34, widx: 34, cap: 34)
at io.netty.buffer.AbstractByteBuf.checkReadableBytes(AbstractByteBuf.java:1138) ~[netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.buffer.AbstractByteBuf.readByte(AbstractByteBuf.java:542) ~[netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at io.netty.buffer.WrappedByteBuf.readByte(WrappedByteBuf.java:423) ~[netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
at com.senhe.flowerpots.service.coder.Decoder.decode(Decoder.java:39) ~[classes/:na]
at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:316) [netty-all-5.0.0.Alpha2.jar:5.0.0.Alpha2]
... 21 common frames omitted