package com.genersoft.iot.vmp.netty.handle;
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import io.netty.buffer.ByteBuf;
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import io.netty.channel.ChannelHandlerContext;
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import io.netty.channel.SimpleChannelInboundHandler;
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import io.netty.channel.socket.DatagramPacket;
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import io.netty.util.CharsetUtil;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.stereotype.Component;
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/**
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* updHandler udp 服务端数据接收处理
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* @author zhongrj
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* @date 2023-02-21
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*/
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@Component
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public class UdpServerHandler extends SimpleChannelInboundHandler<DatagramPacket> {
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private Logger logger = LoggerFactory.getLogger(this.getClass());
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@Override
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protected void channelRead0(ChannelHandlerContext channelHandlerContext, DatagramPacket datagramPacket) throws Exception {
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// 读取收到的数据
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ByteBuf buf = (ByteBuf) datagramPacket.copy().content();
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byte[] req = new byte[buf.readableBytes()];
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buf.readBytes(req);
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String body = new String(req, CharsetUtil.UTF_8);
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System.out.println("【UDP】>>>>>> 收到客户端的数据："+body);
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//获取字符串的长度
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int length = body.length();
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System.out.println("数据长度>>>>>> = " + length);
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}
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//捕获异常
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@Override
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public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause)throws Exception {
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logger.error("UdpServerHandler exceptionCaught"+cause.getMessage());
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System.out.println("UdpServerHandler exceptionCaught"+cause.getMessage());
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cause.printStackTrace();
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ctx.close();
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}
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//消息没有结束的时候触发
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@Override
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public void channelReadComplete(ChannelHandlerContext ctx) throws Exception {
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ctx.flush();
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}
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}
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