bl/common/socket/ServerEvent.go

package socket

import (
	"context"
	"log"
	"net"
	"os"
	"strings"
	"sync/atomic"
	"time"

	"blazing/common/socket/codec"
	"blazing/cool"
	"blazing/logic/service/player"

	"github.com/panjf2000/gnet/v2"
)

func (s *Server) Boot() error {
	//	go s.bootws()
	err := gnet.Run(s, s.network+"://"+s.addr,
		gnet.WithMulticore(true),
		gnet.WithTicker(true),

		// gnet.WithReusePort(true),
		// gnet.WithReuseAddr(true),
		gnet.WithSocketRecvBuffer(s.bufferSize))
	if err != nil {
		panic(err)
	}

	return nil
}

func (s *Server) Stop() error {
	_ = s.eng.Stop(context.Background())
	s.workerPool.Release()

	return nil
}

func (s *Server) OnClose(c gnet.Conn, err error) (action gnet.Action) {
	defer func() {
		if err := recover(); err != nil { // 恢复 panic，err 为 panic 错误值
			// 1. 打印错误信息

			cool.Loger.Error(context.TODO(), "panic 错误：", err)

		}
	}()
	// 识别 RST 导致的连接中断（错误信息含 "connection reset"）
	if err != nil && (strings.Contains(err.Error(), "connection reset") || strings.Contains(err.Error(), "reset by peer")) {
		remoteIP := c.RemoteAddr().(*net.TCPAddr).IP.String()

		log.Printf("RST 攻击检测: 来源 %s, 累计攻击次数 %d", remoteIP)

		// 防护逻辑：临时封禁异常 IP（可扩展为 IP 黑名单）
		//	go s.tempBlockIP(remoteIP, 5*time.Minute)
	}
	//fmt.Println(err, c.RemoteAddr().String(), "断开连接")
	atomic.AddInt64(&s.connected, -1)

	//logging.Infof("conn[%v] disconnected", c.RemoteAddr().String())
	v, _ := c.Context().(*player.ClientData)
	v.LF.Close()
	if v.Player != nil {
		v.SaveL.Do(func() { //使用保存锁,确保在踢人和掉线的时候只保存一次
			//cool.Loger.Info(context.TODO(), "准备保存", v.Player.Info.UserID)
			v.Player.Save() //保存玩家数据

		})

	}

	//}
	//关闭连接
	return
}
func (s *Server) OnTick() (delay time.Duration, action gnet.Action) {
	cool.Loger.Infof(context.Background(), "[connected-count=%v]", atomic.LoadInt64(&s.connected))
	if s.quit && atomic.LoadInt64(&s.connected) == 0 {
		//执行正常退出逻辑
		os.Exit(0)
	}
	return 30 * time.Second, gnet.None
}
func (s *Server) OnBoot(eng gnet.Engine) gnet.Action {
	s.eng = eng

	//	cool.Loger.Infof(context.Background(), " server is listening on %s\n", s.addr)

	return gnet.None
}

func (s *Server) OnOpen(conn gnet.Conn) (out []byte, action gnet.Action) {
	if s.network != "tcp" {
		return nil, gnet.Close
	}

	if conn.Context() == nil {
		conn.SetContext(player.NewClientData(conn)) //注入data
	}

	atomic.AddInt64(&s.connected, 1)

	return nil, gnet.None
}

func (s *Server) OnTraffic(c gnet.Conn) (action gnet.Action) {
	defer func() {
		if err := recover(); err != nil { // 恢复 panic，err 为 panic 错误值
			// 1. 打印错误信息

			cool.Loger.Error(context.TODO(), "panic 错误：", err)

		}
	}()

	ws := c.Context().(*player.ClientData).Wsmsg
	if ws.Tcp { //升级失败时候防止缓冲区溢出
		return s.handleTcp(c)

	}

	tt, len1 := ws.ReadBufferBytes(c)
	if tt == gnet.Close {

		return gnet.Close
	}

	ok, action := ws.Upgrade(c)
	if action != gnet.None { //连接断开
		return action
	}
	if !ok { //升级失败,说明是tcp连接
		ws.Tcp = true

		return s.handleTcp(c)

	}
	//	fmt.Println(ws.Buf.Bytes())
	c.Discard(len1)

	messages, err := ws.Decode(c)
	if err != nil {
		return gnet.Close
	}
	if messages == nil {
		return
	}

	t := c.Context().(*player.ClientData)
	//client := conn.RemoteAddr().String()
	s.workerPool.Submit(func() { //TODO 这里可能存在顺序执行问题,待修复
		for _, msg := range messages {
			t.LF.Producer().Write(msg.Payload)
			//t.OnEvent(msg.Payload)
		}
	})

	return gnet.None
}

func (s *Server) handleTcp(conn gnet.Conn) (action gnet.Action) {

	conn.Context().(*player.ClientData).IsCrossDomain.Do(func() { //跨域检测
		handle(conn)
	})

	data, err := s.codec.Decode(conn)
	if err != nil {
		if err == codec.ErrIncompletePacket {

			return
		}
		return gnet.Close

	}

	s.workerPool.Submit(func() { //TODO 这里可能存在顺序执行问题,待修复
		//conn.Context().(*player.ClientData).OnEvent(data)
		if t, ok := conn.Context().(*player.ClientData); ok {
			t.LF.Producer().Write(data)
		}

	})

	if conn.InboundBuffered() > 0 {
		if err := conn.Wake(nil); err != nil { // wake up the connection manually to avoid missing the leftover data
			cool.Loger.Errorf(context.Background(), "failed to wake up the connection, %v", err)
			return gnet.Close
		}
	}
	return action

}

// CROSS_DOMAIN 定义跨域策略文件内容
const CROSS_DOMAIN = "<?xml version=\"1.0\"?><!DOCTYPE cross-domain-policy><cross-domain-policy><allow-access-from domain=\"*\" to-ports=\"*\" /></cross-domain-policy>\x00"

// TEXT 定义跨域请求的文本格式
const TEXT = "<policy-file-request/>\x00"

func handle(c gnet.Conn) {

	// 读取数据并检查是否为跨域请求
	data, err := c.Peek(len(TEXT))
	if err != nil {
		log.Printf("Error reading cross-domain request: %v", err)
		return
	}

	if string(data) == TEXT { //判断是否是跨域请求
		log.Printf("Received cross-domain request from %s", c.RemoteAddr())
		// 处理跨域请求
		c.Write([]byte(CROSS_DOMAIN))
		c.Discard(len(TEXT))

		return
	}

	//return
}