'io.netty.channel.ChannelInboundHandlerAdapter' 已弃用
时间: 2024-03-15 08:42:39 浏览: 14
是的,确实如此。`io.netty.channel.ChannelInboundHandlerAdapter`是Netty网络编程框架中的一个核心组件,它用于处理入站数据。在最新的Netty版本中,官方已经宣布将该类标记为过时,并推荐开发者使用更加强大和灵活的`io.netty.channel.ChannelInboundHandler`接口来代替它。这是因为,`ChannelInboundHandler`接口提供了更多的方法和更灵活的事件处理能力,可以更好地适应不同的业务场景和需求。因此,建议开发者尽快将代码中使用`ChannelInboundHandlerAdapter`的部分替换为`ChannelInboundHandler`接口的实现。
相关问题
用netty框架写一个socks代理,输出日志使用基于log4j的slf4j,不要使用system.out
好的,这是一个编程类的问题。使用Netty框架编写Socks代理并输出日志,可以使用基于Log4j的Slf4j,而不是System.out。以下是示例代码:
```java
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.ChannelPipeline;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.socksx.SocksAddressType;
import io.netty.handler.codec.socksx.SocksCmdRequest;
import io.netty.handler.codec.socksx.SocksCmdResponse;
import io.netty.handler.codec.socksx.SocksCmdType;
import io.netty.handler.codec.socksx.SocksInitRequest;
import io.netty.handler.codec.socksx.SocksInitResponse;
import io.netty.handler.codec.socksx.SocksMessage;
import io.netty.handler.codec.socksx.SocksProtocolVersion;
import io.netty.handler.codec.socksx.SocksResponse;
import io.netty.handler.codec.socksx.v5.DefaultSocks5CommandRequest;
import io.netty.handler.codec.socksx.v5.Socks5ClientEncoder;
import io.netty.handler.codec.socksx.v5.Socks5CommandRequest;
import io.netty.handler.codec.socksx.v5.Socks5CommandResponseDecoder;
import io.netty.handler.codec.socksx.v5.Socks5InitialRequest;
import io.netty.handler.codec.socksx.v5.Socks5InitialResponseDecoder;
import io.netty.handler.logging.LogLevel;
import io.netty.handler.logging.LoggingHandler;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class SocksProxyClient {
private static final Logger logger = LoggerFactory.getLogger(SocksProxyClient.class);
private final String proxyHost;
private final int proxyPort;
private final String targetHost;
private final int targetPort;
public SocksProxyClient(String proxyHost, int proxyPort, String targetHost, int targetPort) {
this.proxyHost = proxyHost;
this.proxyPort = proxyPort;
this.targetHost = targetHost;
this.targetPort = targetPort;
}
public void start() throws Exception {
EventLoopGroup group = new NioEventLoopGroup();
try {
Bootstrap b = new Bootstrap();
b.group(group)
.channel(NioSocketChannel.class)
.option(ChannelOption.SO_KEEPALIVE, true)
.handler(new LoggingHandler(LogLevel.INFO))
.handler(new ChannelInitializer<SocketChannel>() {
@Override
public void initChannel(SocketChannel ch) throws Exception {
ChannelPipeline p = ch.pipeline();
p.addLast(new Socks5InitialResponseDecoder());
p.addLast(new Socks5CommandResponseDecoder());
p.addLast(new Socks5ClientEncoder());
p.addLast(new SocksProxyClientHandler());
}
});
ChannelFuture f = b.connect(proxyHost, proxyPort).sync();
f.channel().closeFuture().sync();
} finally {
group.shutdownGracefully();
}
}
private class SocksProxyClientHandler extends ChannelInboundHandlerAdapter {
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
Socks5InitialRequest initialRequest = new DefaultSocks5InitialRequest(SocksProtocolVersion.SOCKS5);
ctx.writeAndFlush(initialRequest);
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
if (msg instanceof Socks5InitialResponse) {
Socks5InitialResponse initialResponse = (Socks5InitialResponse) msg;
if (initialResponse.authMethods().contains(Socks5AuthMethod.NO_AUTH)) {
Socks5CommandRequest commandRequest = new DefaultSocks5CommandRequest(Socks5CommandType.CONNECT, SocksAddressType.DOMAIN, targetHost, targetPort);
ctx.writeAndFlush(commandRequest);
} else {
logger.error("Socks5 proxy authentication not supported");
ctx.close();
}
} else if (msg instanceof Socks5CommandResponse) {
Socks5CommandResponse commandResponse = (Socks5CommandResponse) msg;
if (commandResponse.status().equals(Socks5CommandStatus.SUCCESS)) {
logger.info("Socks5 proxy connection established");
// TODO: handle proxy connection
} else {
logger.error("Socks5 proxy connection failed: {}", commandResponse.status());
ctx.close();
}
} else {
logger.error("Unexpected message type: {}", msg.getClass().getName());
ctx.close();
}
}
@Override
public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {
logger.error("Socks proxy client error", cause);
ctx.close();
}
}
public static void main(String[] args) throws Exception {
String proxyHost = "127.0.0.1";
int proxyPort = 1080;
String targetHost = "www.baidu.com";
int targetPort = 80;
SocksProxyClient client = new SocksProxyClient(proxyHost, proxyPort, targetHost, targetPort);
client.start();
}
}
```
这是一个简单的Socks代理客户端,它使用Netty框架和Slf4j记录日志。在这个示例中,我们连接到一个Socks5代理服务器,并尝试连接到目标主机和端口。如果连接成功,我们可以在TODO部分处理代理连接。如果连接失败,我们将关闭连接并记录错误日志。
kotlin如何使用netty
在Kotlin中使用Netty,需要先引入Netty的依赖库,比如:
```
dependencies {
implementation 'io.netty:netty-all:4.1.53.Final'
}
```
然后可以按照Netty官方文档的示例实现自己的网络应用。例如,以下是一个简单的Echo服务器示例:
```kotlin
import io.netty.bootstrap.ServerBootstrap
import io.netty.buffer.ByteBuf
import io.netty.buffer.Unpooled
import io.netty.channel.ChannelHandlerContext
import io.netty.channel.ChannelInboundHandlerAdapter
import io.netty.channel.ChannelInitializer
import io.netty.channel.nio.NioEventLoopGroup
import io.netty.channel.socket.SocketChannel
import io.netty.channel.socket.nio.NioServerSocketChannel
class EchoServerHandler : ChannelInboundHandlerAdapter() {
override fun channelRead(ctx: ChannelHandlerContext, msg: Any) {
val buf = msg as ByteBuf
val data = ByteArray(buf.readableBytes())
buf.readBytes(data)
val response = Unpooled.copiedBuffer(data)
ctx.write(response)
}
override fun channelReadComplete(ctx: ChannelHandlerContext) {
ctx.flush()
}
override fun exceptionCaught(ctx: ChannelHandlerContext, cause: Throwable) {
cause.printStackTrace()
ctx.close()
}
}
fun main() {
val bossGroup = NioEventLoopGroup()
val workerGroup = NioEventLoopGroup()
try {
val bootstrap = ServerBootstrap()
bootstrap.group(bossGroup, workerGroup)
.channel(NioServerSocketChannel::class.java)
.childHandler(object : ChannelInitializer<SocketChannel>() {
override fun initChannel(ch: SocketChannel) {
ch.pipeline().addLast(EchoServerHandler())
}
})
val future = bootstrap.bind(8080).sync()
future.channel().closeFuture().sync()
} finally {
workerGroup.shutdownGracefully()
bossGroup.shutdownGracefully()
}
}
```
在这个示例中,我们创建了一个Echo服务器,当客户端发送数据时,服务器会将数据原样返回给客户端。服务器使用了NIO的事件循环组(NioEventLoopGroup)来处理网络事件,同时使用了ServerBootstrap来启动服务器。在ChannelInitializer的初始化方法中,我们将EchoServerHandler添加到SocketChannel的处理器链中,用于处理接收到的数据。最后,我们绑定了8080端口并等待服务器关闭。