Netty搭建websocket服务器，postman可以连接，浏览器无法连接

简介：Netty搭建websocket 服务器，postman可以连接，浏览器无法连接，很奇怪，不知道为什么。最后更换端口解决问题，原来端口时6666，把6666改成其他端口就可以了。

过程：
前端代码
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后端netty代码相关配置

//socket端口int port = 4848;//websocket端口int wsPort=6666;EventLoopGroup bossGroup = new NioEventLoopGroup();EventLoopGroup workerGroup = new NioEventLoopGroup();try{//socket通信ServerBootstrap bootstrap = new ServerBootstrap();//websocket通信ServerBootstrap wbsBootstrap=new ServerBootstrap();//处理socket信息bootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(new ChannelInitializer<SocketChannel>(){@Overrideprotected void initChannel(SocketChannel ch) throws Exception {System.out.println("连接ip"+ch.remoteAddress());clientContext.put(ch.remoteAddress().getHostString(),ch);
//									ch.writeAndFlush(Unpooled.copiedBuffer(Bytes.HexString2Bytes("a55a000a820000880d0a")));System.out.println(ch.remoteAddress()+"xxxxx！");//添加一个粘包分包处理器ch.pipeline().addLast(new DelimiterBasedFrameDecoder(29, false, Unpooled.wrappedBuffer(new byte[] {(byte)0x0D,(byte)0x0A})));//注册handelerch.pipeline().addLast(new MyNettyServerHandler(systemService));}							}).option(ChannelOption.SO_BACKLOG, 1024).childOption(ChannelOption.SO_KEEPALIVE, true);wbsBootstrap.group(bossGroup, workerGroup).channel(NioServerSocketChannel.class).childHandler(new WebSocketChannelInitializer());ChannelFuture f = bootstrap.bind(port).sync();ChannelFuture wsf = wbsBootstrap.bind(wsPort).sync();wsf.channel().closeFuture().sync();f.channel().closeFuture().sync();

后端webSocketchannelInitializer()的代码：

public class WebSocketChannelInitializer extends ChannelInitializer<SocketChannel>{@Overrideprotected void initChannel(SocketChannel ch) throws Exception {System.out.println("连接ws-ip"+ch.remoteAddress());
//        ChannelPipeline pipeline = ch.pipeline();
//        pipeline.addLast(new HttpServerCodec());
//        pipeline.addLast(new ChunkedWriteHandler());
//        //用于将http数据聚合到一起发送一个请求 fullHttpRequest
//        pipeline.addLast(new HttpObjectAggregator(8192));
//        pipeline.addLast(new WebSocketServerProtocolHandler("/"));//传入websocket path
//        pipeline.addLast(new TextWebSocketHandler());//传入websocket path// 获取职责链ChannelPipeline pipeline = ch.pipeline();// pipeline.addLast(new HttpServerCodec());pipeline.addLast(new HttpObjectAggregator(65535));//解决跨域问题CorsConfig corsConfig = CorsConfigBuilder.forAnyOrigin().allowNullOrigin().allowCredentials().build();pipeline.addLast(new CorsHandler(corsConfig));pipeline.addLast(new ChunkedWriteHandler());pipeline.addLast(new WebSocketServerProtocolHandler("/"));pipeline.addLast(new TextWebSocketHandler());}
}

后端TextWebSocketHandler()的代码：

public class TextWebSocketHandler extends SimpleChannelInboundHandler<TextWebSocketFrame> {@Overrideprotected void channelRead0(ChannelHandlerContext ctx, TextWebSocketFrame msg) throws Exception {int size = GlobalChannelGroup.channelGroup.size();System.out.println("当前微信墙连接数:" + (size == 0 ? 0 : size - 1));System.out.println("收到消息：" + msg.text());Channel channel = ctx.channel();
//		ctx.writeAndFlush(msg.text());
//		ctx.writeAndFlush(msg);ctx.writeAndFlush(new TextWebSocketFrame("nihaohao"));
//		GlobalChannelGroup.channelGroup.forEach(o -> {
//			if (o.localAddress().toString().endsWith("6666")) {
//				o.writeAndFlush(msg.text());
//			} else {
//				TextWebSocketFrame text = new TextWebSocketFrame(o.remoteAddress() + "发送消息：" + msg.text() + "\n");
//				o.writeAndFlush(text);
//			}
//		});}@Overridepublic void handlerAdded(ChannelHandlerContext ctx) throws Exception {Channel ch = ctx.channel();GlobalChannelGroup.channelGroup.add(ch);
//		GlobalChannelGroup.channels.add(ctx);}@Overridepublic void channelInactive(ChannelHandlerContext ctx) throws Exception {System.out.println(ctx.channel().remoteAddress() + ":离开聊天室");}@Overridepublic void channelActive(ChannelHandlerContext ctx) throws Exception {Channel ch = ctx.channel();GlobalChannelGroup.channels.add(ctx);System.out.println(ch.remoteAddress() + "：连接到聊天室");}@Overridepublic void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) throws Exception {System.out.println("异常");GlobalChannelGroup.channels.remove(ctx);ctx.close();}
}