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问题：

Netty 代理服务器引发的异常异常

吕征
2023-03-14

我正在将本地netty服务器连接到远程https服务器以代理请求。

public class CustomInitializer extends ChannelInitializer<SocketChannel> {

    @Autowired(required = false)
    private SslContext sslContext;


    @Override
    public void initChannel(SocketChannel ch) {
        ChannelPipeline p = ch.pipeline();
        if (sslContext != null) {
            p.addLast(sslContext.newHandler(ch.alloc()));
        }
        p.addLast(new LoggingHandler(LogLevel.INFO));
        p.addLast(new HttpClientCodec());
        p.addLast(new HttpObjectAggregator(8*1024, true));
        p.addLast(new MyCustomHandler());
    }
}

下面是我如何创建ssLcontext bean

@Bean
    public SslContext sslContext(@Value("${tcp.ssl}") boolean ssl) throws SSLException, CertificateException {
        SslContext sslContext = null;
        if (ssl) {
            SelfSignedCertificate ssc = new SelfSignedCertificate();
            sslContext = SslContextBuilder.forServer(ssc.certificate(), ssc.privateKey()).build();
        }
        return sslContext;
    }

当我点击我的本地主机时，它应该代理到后端。我得到以下异常。但是，如果SSL关闭并且我连接到远程，这是在不同端口上运行的本地服务器，则工作正常

io.netty.handler.codec.DecoderException: io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record: dsffddfs
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:459)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:547)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:501)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:834)
io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record: thjhjhhj     at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1178)
    at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1243)
    at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489)
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:547)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:501)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:834)
io.netty.handler.codec.DecoderException: io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record: tyuuiiio
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:459)
    at io.netty.handler.codec.ByteToMessageDecoder.channelRead(ByteToMessageDecoder.java:265)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:340)
    at io.netty.channel.DefaultChannelPipeline$HeadContext.channelRead(DefaultChannelPipeline.java:1434)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:362)
    at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:348)
    at io.netty.channel.DefaultChannelPipeline.fireChannelRead(DefaultChannelPipeline.java:965)
    at io.netty.channel.nio.AbstractNioByteChannel$NioByteUnsafe.read(AbstractNioByteChannel.java:163)
    at io.netty.channel.nio.NioEventLoop.processSelectedKey(NioEventLoop.java:647)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeysPlain(NioEventLoop.java:547)
    at io.netty.channel.nio.NioEventLoop.processSelectedKeys(NioEventLoop.java:501)
    at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:461)
    at io.netty.util.concurrent.SingleThreadEventExecutor$5.run(SingleThreadEventExecutor.java:884)
    at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
    at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: io.netty.handler.ssl.NotSslRecordException: not an SSL/TLS record: 678900
    at io.netty.handler.ssl.SslHandler.decodeJdkCompatible(SslHandler.java:1178)
    at io.netty.handler.ssl.SslHandler.decode(SslHandler.java:1243)
    at io.netty.handler.codec.ByteToMessageDecoder.decodeRemovalReentryProtection(ByteToMessageDecoder.java:489)
    at io.netty.handler.codec.ByteToMessageDecoder.callDecode(ByteToMessageDecoder.java:428)
    ... 16 more

编辑

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共有1个答案

卫仲卿
2023-03-14

当您收到NotSslRecordException异常时，您最好的起点是错误之后的随机字节blob。

您的“blob”以以下字节开始：504f5354…

将十六进制数据转换回字符串后，您会得到< code>50 = P，< code>4f = O，< code>53 = S，< code>54 = T，最终结果:< code>POST

由于我们现在将二进制 blob 的开头转换为 String，因此我们现在需要弄清楚哪些协议使用这些“魔术字符串”。我们不必寻找它，这是一个HTTP请求，你不能使用HTTPS来接收它。

解决方案很简单，使用https连接到服务器，而不是http:

https://localhost:8080/

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