我用netty编写了一个小型http代理,它已经运行了一段时间了。今天我开始在一个客户端的日志文件中发现奇怪的异常:
java.lang.UnsupportedOperationException: unsupported message type: DefaultFullHttpResponse (expected: ByteBuf, FileRegion)
at io.netty.channel.nio.AbstractNioByteChannel.filterOutboundMessage(AbstractNioByteChannel.java:276) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannel$AbstractUnsafe.write(AbstractChannel.java:654) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.DefaultChannelPipeline$HeadContext.write(DefaultChannelPipeline.java:1054) ~[netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:651) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.logging.LoggingHandler.write(LoggingHandler.java:289) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeWrite(AbstractChannelHandlerContext.java:658) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.write(AbstractChannelHandlerContext.java:716) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:706) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.writeAndFlush(AbstractChannelHandlerContext.java:741) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.codec.http.HttpObjectAggregator.decode(HttpObjectAggregator.java:131) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.codec.http.HttpObjectAggregator.decode(HttpObjectAggregator.java:54) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.codec.MessageToMessageDecoder.channelRead(MessageToMessageDecoder.java:89) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:163) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.handler.logging.LoggingHandler.channelRead(LoggingHandler.java:283) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:333) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:319) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:787) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:130) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:511) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeysOptimized(NioEventLoop.java:468) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:382) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:354) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.util.concurrent.SingleThreadEventExecutor$2.run(SingleThreadEventExecutor.java:116) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at io.netty.util.concurrent.DefaultThreadFactory$DefaultRunnableDecorator.run(DefaultThreadFactory.java:137) [netty-all-4.0.23.Final.jar:4.0.23.Final]
at java.lang.Thread.run(Thread.java:745) [na:1.7.0_79]
在查找源代码时,似乎在响应
100 Continue
请求发送POST
状态时出现问题(HttpObjectAggregator
第130-139行)if (is100ContinueExpected(m)) {
ctx.writeAndFlush(CONTINUE).addListener(new ChannelFutureListener() {
@Override
public void operationComplete(ChannelFuture future)
throws Exception {
if (!future.isSuccess()) {
ctx.fireExceptionCaught(future.cause());
}
}
});
}
实际上,导致问题的客户端似乎是唯一一个随请求一起发送
Expect: 100-continue
头的客户端。这使我认为我的处理程序管道可能设置错误:p.addLast(new LoggingHandler(LogLevel.DEBUG));
p.addLast(new HttpRequestDecoder());
p.addLast(new HttpObjectAggregator(MAX_CONTENT_LENGTH));
p.addLast(new HttpResponseEncoder());
p.addLast(new MyHandler(...));
HttpObjectAggregator
的api文档声明请注意,在channelpipeline中的httpobjectaggregator之前需要有httpresponseencoder或httprequestencoder。
所以我认为
HttpRequestDecoder
和HttpResponseEncoder
都应该在HttpObjectAggregator
之前。那可能是我的问题吗? 最佳答案
您是否尝试更改顺序(聚合器是myhandler之前的最后一个)?
关于java - 如何为HTTP代理配置Netty管道,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/31654747/