# websocket--3.5.netty方式02
package com.zs.websocket.netty2;
import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelOption;
import io.netty.channel.EventLoopGroup;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.DisposableBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Slf4j
@Component
public class NioWebSocketServer implements InitializingBean, DisposableBean {
@Autowired
private WebSocketProperties webSocketProperties;
@Autowired
private NioWebSocketChannelInitializer webSocketChannelInitializer;
private EventLoopGroup bossGroup;
private EventLoopGroup workGroup;
private ChannelFuture channelFuture;
@Override
public void afterPropertiesSet() throws Exception {
try {
bossGroup = new NioEventLoopGroup(webSocketProperties.getBoss());
workGroup = new NioEventLoopGroup(webSocketProperties.getWork());
ServerBootstrap serverBootstrap = new ServerBootstrap();
serverBootstrap.option(ChannelOption.SO_BACKLOG, 1024)
.group(bossGroup, workGroup)
.channel(NioServerSocketChannel.class)
.localAddress(webSocketProperties.getPort())
.childHandler(webSocketChannelInitializer);
channelFuture = serverBootstrap.bind().sync();
} finally {
if (channelFuture != null && channelFuture.isSuccess()) {
log.info("Netty server startup on port: {} (websocket) with context path '{}'", webSocketProperties.getPort(), webSocketProperties.getPath());
} else {
log.error("Netty server startup failed.");
if (bossGroup != null)
bossGroup.shutdownGracefully().sync();
if (workGroup != null)
workGroup.shutdownGracefully().sync();
}
}
}
@Override
public void destroy() throws Exception {
log.info("Shutting down Netty server...");
if (bossGroup != null)
bossGroup.shutdownGracefully().sync();
if (workGroup != null)
workGroup.shutdownGracefully().sync();
if (channelFuture != null)
channelFuture.channel().closeFuture().syncUninterruptibly();
log.info("Netty server shutdown.");
}
}
package com.zs.websocket.netty2;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.socket.SocketChannel;
import io.netty.handler.codec.http.HttpObjectAggregator;
import io.netty.handler.codec.http.HttpServerCodec;
import io.netty.handler.codec.http.websocketx.WebSocketServerProtocolHandler;
import io.netty.handler.stream.ChunkedWriteHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
@Component
public class NioWebSocketChannelInitializer extends ChannelInitializer<SocketChannel> {
@Autowired
private WebSocketProperties webSocketProperties;
@Autowired
private NioWebSocketHandler nioWebSocketHandler;
@Override
protected void initChannel(SocketChannel socketChannel) {
socketChannel.pipeline()
.addLast(new HttpServerCodec())
.addLast(new ChunkedWriteHandler())
.addLast(new HttpObjectAggregator(8192))
.addLast(nioWebSocketHandler)
.addLast(new WebSocketServerProtocolHandler(webSocketProperties.getPath(), null, true, 65536));
}
}
package com.zs.websocket.netty2;
import cn.hutool.http.HttpUtil;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.handler.codec.http.FullHttpRequest;
import io.netty.handler.codec.http.websocketx.*;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import java.nio.charset.Charset;
import java.nio.charset.StandardCharsets;
import java.util.HashMap;
@Slf4j
@ChannelHandler.Sharable
@Component
public class NioWebSocketHandler extends SimpleChannelInboundHandler<WebSocketFrame> {
@Autowired
private NioWebSocketChannelPool webSocketChannelPool;
@Autowired
private WebSocketProperties webSocketProperties;
@Override
public void channelActive(ChannelHandlerContext ctx) throws Exception {
log.debug("客户端连接:{}", ctx.channel().id());
webSocketChannelPool.addChannel(ctx.channel());
super.channelActive(ctx);
}
@Override
public void channelInactive(ChannelHandlerContext ctx) throws Exception {
log.debug("客户端断开连接:{}", ctx.channel().id());
webSocketChannelPool.removeChannel(ctx.channel());
super.channelInactive(ctx);
}
@Override
public void channelReadComplete(ChannelHandlerContext ctx) {
ctx.channel().flush();
}
@Override
protected void channelRead0(ChannelHandlerContext ctx, WebSocketFrame frame) {
// 根据请求数据类型进行分发处理
if (frame instanceof PingWebSocketFrame) {
pingWebSocketFrameHandler(ctx, (PingWebSocketFrame) frame);
} else if (frame instanceof TextWebSocketFrame) {
textWebSocketFrameHandler(ctx, (TextWebSocketFrame) frame);
} else if (frame instanceof CloseWebSocketFrame) {
closeWebSocketFrameHandler(ctx, (CloseWebSocketFrame) frame);
}
}
@Override
public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
log.info("客户端请求数据类型:{}", msg.getClass());
if (msg instanceof FullHttpRequest) {
fullHttpRequestHandler(ctx, (FullHttpRequest) msg);
}
super.channelRead(ctx, msg);
}
/**
* 处理连接请求,客户端WebSocket发送握手包时会执行这一次请求
*
* @param ctx
* @param request
*/
private void fullHttpRequestHandler(ChannelHandlerContext ctx, FullHttpRequest request) {
String uri = request.uri();
HashMap<String, String> params = (HashMap<String, String>) HttpUtil.decodeParamMap(uri, StandardCharsets.UTF_8);
log.debug("客户端请求参数:{}", params);
// 判断请求路径是否跟配置中的一致
if (webSocketProperties.getPath().equals(RequestUriUtils.getBasePath(uri)))
// 因为有可能携带了参数,导致客户端一直无法返回握手包,因此在校验通过后,重置请求路径
request.setUri(webSocketProperties.getPath());
else
ctx.close();
}
/**
* 客户端发送断开请求处理
*
* @param ctx
* @param frame
*/
private void closeWebSocketFrameHandler(ChannelHandlerContext ctx, CloseWebSocketFrame frame) {
ctx.close();
}
/**
* 创建连接之后,客户端发送的消息都会在这里处理
*
* @param ctx
* @param frame
*/
private void textWebSocketFrameHandler(ChannelHandlerContext ctx, TextWebSocketFrame frame) {
// 客户端发送过来的内容不进行业务处理,原样返回
ctx.channel().writeAndFlush(frame.retain());
}
/**
* 处理客户端心跳包
*
* @param ctx
* @param frame
*/
private void pingWebSocketFrameHandler(ChannelHandlerContext ctx, PingWebSocketFrame frame) {
ctx.channel().writeAndFlush(new PongWebSocketFrame(frame.content().retain()));
}
}
package com.zs.websocket.netty2;
import io.netty.channel.Channel;
import io.netty.channel.group.ChannelGroup;
import io.netty.channel.group.DefaultChannelGroup;
import io.netty.util.concurrent.GlobalEventExecutor;
import lombok.extern.slf4j.Slf4j;
import org.springframework.stereotype.Component;
@Slf4j
@Component
public class NioWebSocketChannelPool {
private final ChannelGroup channels = new DefaultChannelGroup(GlobalEventExecutor.INSTANCE);
/**
* 新增一个客户端通道
*
* @param channel
*/
public void addChannel(Channel channel) {
channels.add(channel);
}
/**
* 移除一个客户端连接通道
*
* @param channel
*/
public void removeChannel(Channel channel) {
channels.remove(channel);
}
}
package com.zs.websocket.netty2;
import java.util.HashMap;
import java.util.Map;
public class RequestUriUtils {
/**
* 将路径参数转换成Map对象,如果路径参数出现重复参数名,将以最后的参数值为准
* @param uri 传入的携带参数的路径
* @return
*/
public static Map<String, String> getParams(String uri) {
Map<String, String> params = new HashMap<>(10);
int idx = uri.indexOf("?");
if (idx != -1) {
String[] paramsArr = uri.substring(idx + 1).split("&");
for (String param : paramsArr) {
idx = param.indexOf("=");
params.put(param.substring(0, idx), param.substring(idx + 1));
}
}
return params;
}
/**
* 获取URI中参数以外部分路径
* @param uri
* @return
*/
public static String getBasePath(String uri) {
if (uri == null || uri.isEmpty())
return null;
int idx = uri.indexOf("?");
if (idx == -1)
return uri;
return uri.substring(0, idx);
}
}
package com.zs.websocket.netty2;
import lombok.Getter;
import lombok.Setter;
import org.springframework.boot.context.properties.ConfigurationProperties;
import org.springframework.stereotype.Component;
@Getter
@Setter
@Component
@ConfigurationProperties(prefix = "chat.websocket")
public class WebSocketProperties {
private Integer port = 8070; // 监听端口
private String path = "/ws"; // 请求路径
private Integer boss = 2; // bossGroup线程数
private Integer work = 2; // workGroup线程数
}