agent-tcp/src/main/java/com/tongran/agenttcp/server/handler/AgentEncoderHandler.java

package com.tongran.agenttcp.server.handler;

import com.alibaba.fastjson2.JSON;
import com.tongran.agenttcp.server.model.Message;
import com.tongran.agenttcp.server.netty.core.session.SessionManager;
import com.tongran.agenttcp.utils.AssertLog;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.Unpooled;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelOutboundHandlerAdapter;
import io.netty.channel.ChannelPromise;
import org.apache.commons.lang3.StringUtils;
import org.springframework.stereotype.Component;

import java.nio.charset.StandardCharsets;

@Component
@ChannelHandler.Sharable
public class AgentEncoderHandler extends ChannelOutboundHandlerAdapter {

    protected final SessionManager sessionManager;

    public AgentEncoderHandler() {
        this.sessionManager = SessionManager.getInstance();
    }

    /**
     * 消息解码器
     */
    @Override
    public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
        if (msg instanceof Message) {
            Message entity = (Message) msg;
            if (StringUtils.isBlank(entity.getData())) {
                AssertLog.error(">>[down]:IP:{},errorContent:{}", sessionManager.client(ctx), msg);
                return;
            }
            AssertLog.info(">>[down]:IP:{},[content]==>{}", sessionManager.client(ctx), entity.getData());
//            String json =  JSON.toJSONString(entity);
            String json = "agent-server:"+JSON.toJSONString(entity)+"@tong-ran";
            byte[] bytes = json.getBytes(StandardCharsets.UTF_8); // 显式指定 UTF-8
//            byte[] bytes = EscapeUtil.hexStringToByteArray(entity.getContent());
            ByteBuf buf = Unpooled.wrappedBuffer(bytes);
            ctx.write(buf, promise);
        }
    }

}