feat(log): Seq 会话追踪、控制台降噪与推送质量增强

请求日志自动带 sid/request_id，支持 LogBind；挂 Seq 后控制台仅 Warn+，Seq 仍全量；并修毫秒时间戳、@m、失败重试与停机 flush。

Co-authored-by: Cursor <cursoragent@cursor.com>

application.go

@@ -2,7 +2,9 @@ package hotime
 
 import (
 	"context"
+	"crypto/rand"
 	"database/sql"
+	"encoding/hex"
 	"fmt"
 	"io/ioutil"
 	stdlog "log"
@@ -25,8 +27,8 @@ import (
 	. "code.hoteas.com/golang/hotime/db"
 	"code.hoteas.com/golang/hotime/log"
 	mysql "github.com/go-sql-driver/mysql"
-	logrus "github.com/sirupsen/logrus"
 	"github.com/rs/zerolog"
+	logrus "github.com/sirupsen/logrus"
 )
 
 type Application struct {
@@ -97,10 +99,45 @@ func (that *Application) initiateGracefulShutdown(drain, shutdown time.Duration)
 		} else {
 			that.Log.Infof("服务已安全关闭")
 		}
+		// 冲刷 Seq 队列，避免停机前后关键日志丢失
+		that.Log.CloseSeq()
+		if that.WebConnectLog != nil {
+			that.WebConnectLog.CloseSeq()
+		}
 		os.Exit(0)
 	})
 }
 
+// clientIP 取客户端真实 IP：X-Real-IP → X-Forwarded-For 第一段 → RemoteAddr
+func clientIP(req *http.Request) string {
+	if req == nil {
+		return ""
+	}
+	if ip := strings.TrimSpace(req.Header.Get("X-Real-IP")); ip != "" {
+		return ip
+	}
+	if xff := req.Header.Get("X-Forwarded-For"); xff != "" {
+		if i := strings.Index(xff, ","); i >= 0 {
+			return strings.TrimSpace(xff[:i])
+		}
+		return strings.TrimSpace(xff)
+	}
+	host, _, err := net.SplitHostPort(req.RemoteAddr)
+	if err == nil && host != "" {
+		return host
+	}
+	return req.RemoteAddr
+}
+
+// shortID 生成 n 字节随机 hex（n=6 → 12 位）
+func shortID(n int) string {
+	b := make([]byte, n)
+	if _, err := rand.Read(b); err != nil {
+		return Md5(strconv.Itoa(Rand(10)))[:n*2]
+	}
+	return hex.EncodeToString(b)
+}
+
 // Run 启动实例
 func (that *Application) Run(router Router) {
 	//如果没有设置配置自动生成配置
@@ -438,10 +475,22 @@ func (that *Application) handler(w http.ResponseWriter, req *http.Request) {
 	if err != nil {
 		unescapeUrl = req.RequestURI
 	}
+
+	// 请求级追踪：sid=sessionId 前 12 位（脱敏），request_id 回写响应头
+	requestId := shortID(6)
+	sid := sessionId
+	if len(sid) > 12 {
+		sid = sid[:12]
+	}
+	w.Header().Set("X-Request-Id", requestId)
+	reqLog := that.Log.WithFields("sid", sid, "request_id", requestId)
+	dbCopy := that.Db
+	dbCopy.Log = reqLog
+
 	//访问实例
 	context := Context{SessionIns: SessionIns{SessionId: sessionId, HoTimeCache: that.HoTimeCache},
-		Resp: w, Req: req, Application: that, RouterString: s, Config: that.Config, Db: &that.Db,
-		HandlerStr: unescapeUrl}
+		Resp: w, Req: req, Application: that, RouterString: s, Config: that.Config, Db: &dbCopy,
+		HandlerStr: unescapeUrl, Logger: reqLog}
 	//header默认设置
 	header := w.Header()
 	header.Set("Content-Type", "text/html; charset=utf-8")
@@ -455,26 +504,17 @@ func (that *Application) handler(w http.ResponseWriter, req *http.Request) {
 	defer func() {
 		//是否展示日志
 		if that.WebConnectLog != nil {
-
-			//负载均衡优化
-			ipStr := ""
-			if req.Header.Get("X-Forwarded-For") != "" {
-				ipStr = req.Header.Get("X-Forwarded-For")
-			} else if req.Header.Get("X-Real-IP") != "" {
-				ipStr = req.Header.Get("X-Real-IP")
-			}
-			//负载均衡优化
-			if ipStr == "" {
-				//RemoteAddr := that.Req.RemoteAddr
-				ipStr = Substr(context.Req.RemoteAddr, 0, strings.Index(context.Req.RemoteAddr, ":"))
-			}
-
-			that.WebConnectLog.Info().
-				Str("ip", ipStr).
+			evt := that.WebConnectLog.Info().
+				Str("ip", clientIP(req)).
 				Str("method", context.Req.Method).
+				Str("sid", sid).
+				Str("request_id", requestId).
 				Float64("cost_ms", ObjToFloat64(time.Now().UnixNano()-nowUnixTime.UnixNano())/1000000.00).
-				Float64("size_kb", ObjToFloat64(context.DataSize)/1000.00).
-				Msg(context.HandlerStr)
+				Float64("size_kb", ObjToFloat64(context.DataSize)/1000.00)
+			if country := req.Header.Get("EO-Client-IPCountry"); country != "" {
+				evt = evt.Str("ip_country", country)
+			}
+			evt.Msg(context.HandlerStr)
 		}
 	}()