netty 搭建 websocket 服务端，客户端通过公钥方式来访问http 进行注册，注册成功后获取认证信息，并通过认证信息连接websocket端

你可以使用Netty来搭建WebSocket服务端，并通过公钥方式进行HTTP注册。以下是一个基本的示例代码：

public class WebSocketServer {

    public void start() {
        EventLoopGroup bossGroup = new NioEventLoopGroup();
        EventLoopGroup workerGroup = new NioEventLoopGroup();

        try {
            ServerBootstrap bootstrap = new ServerBootstrap();
            bootstrap.group(bossGroup, workerGroup)
                    .channel(NioServerSocketChannel.class)
                    .childHandler(new WebSocketServerInitializer());

            ChannelFuture future = bootstrap.bind(8080).sync();
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        } finally {
            bossGroup.shutdownGracefully();
            workerGroup.shutdownGracefully();
        }
    }

    public static void main(String[] args) {
        WebSocketServer server = new WebSocketServer();
        server.start();
    }
}

然后，你可以创建一个 `WebSocketServerInitializer` 类来处理WebSocket连接和HTTP请求：

public class WebSocketServerInitializer extends ChannelInitializer<SocketChannel> {

    @Override
    protected void initChannel(SocketChannel ch) throws Exception {
        ChannelPipeline pipeline = ch.pipeline();

        // 添加HTTP请求处理器
        pipeline.addLast(new HttpServerCodec());
        pipeline.addLast(new HttpObjectAggregator(65536));
        pipeline.addLast(new ChunkedWriteHandler());
        pipeline.addLast(new HttpHandler());

        // 添加WebSocket处理器
        pipeline.addLast(new WebSocketServerProtocolHandler("/websocket"));
        pipeline.addLast(new WebSocketHandler());
    }
}

在 `HttpHandler` 类中，你可以进行公钥验证和注册的逻辑处理：

public class HttpHandler extends SimpleChannelInboundHandler<FullHttpRequest> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, FullHttpRequest request) throws Exception {
        // 进行公钥验证和注册的逻辑处理
        // ...

        // 注册成功后返回认证信息
        FullHttpResponse response = new DefaultFullHttpResponse(HttpVersion.HTTP_1_1, HttpResponseStatus.OK);
        response.content().writeBytes("Authentication successful!".getBytes());
        response.headers().set(HttpHeaderNames.CONTENT_TYPE, "text/plain");
        ctx.writeAndFlush(response);

        ctx.channel().close();
    }
}

最后，在 `WebSocketHandler` 类中，你可以处理WebSocket连接和消息的逻辑：

public class WebSocketHandler extends SimpleChannelInboundHandler<WebSocketFrame> {

    @Override
    protected void channelRead0(ChannelHandlerContext ctx, WebSocketFrame frame) throws Exception {
        // 处理WebSocket消息
        // ...
    }

    @Override
    public void channelActive(ChannelHandlerContext ctx) throws Exception {
        // WebSocket连接建立时的处理
        // ...
    }

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        // WebSocket连接关闭时的处理
        // ...
    }
}

这是一个简单的示例，你可以根据你的需求进行更详细的实现。希望对你有帮助！