补齐相关日志日志

internal/middleware/logger.go

@@ -2,6 +2,7 @@ package middleware
 
 import (
 	"log/slog"
+	"net/http"
 	"net/url"
 	"strings"
 	"time"
@@ -30,6 +31,17 @@ func sanitizeQuery(query string) string {
 	return values.Encode()
 }
 
+// maxUserAgentLen user_agent 日志字段最大长度：超出截断，避免异常长 UA 撑大日志体积。
+const maxUserAgentLen = 256
+
+// truncateUserAgent 截断超长 User-Agent（仅用于日志展示）。
+func truncateUserAgent(ua string) string {
+	if len(ua) <= maxUserAgentLen {
+		return ua
+	}
+	return ua[:maxUserAgentLen] + "...(truncated)"
+}
+
 func GinSlogMiddleware() gin.HandlerFunc {
 	return func(c *gin.Context) {
 
@@ -40,16 +52,26 @@ func GinSlogMiddleware() gin.HandlerFunc {
 		// 处理请求
 		c.Next()
 
-		// 请求结束后打日志
-		slog.InfoContext(c.Request.Context(), "GIN_REQUEST",
-			"request_id", GetRequestID(c.Request.Context()),
+		// 请求结束后按状态码分级打日志：5xx=Error、4xx（除 401）=Warn、其余=Info。
+		ctx := c.Request.Context()
+		status := c.Writer.Status()
+		attrs := []any{
+			"request_id", GetRequestID(ctx),
 			"method", c.Request.Method,
 			"path", path,
 			"query", query,
-			"status", c.Writer.Status(),
+			"status", status,
 			"ip", c.ClientIP(),
 			"latency", time.Since(start).String(),
-			"user_agent", c.Request.UserAgent(),
-		)
+			"user_agent", truncateUserAgent(c.Request.UserAgent()),
+		}
+		switch {
+		case status >= http.StatusInternalServerError:
+			slog.ErrorContext(ctx, "GIN_REQUEST", attrs...)
+		case status >= http.StatusBadRequest && status != http.StatusUnauthorized:
+			slog.WarnContext(ctx, "GIN_REQUEST", attrs...)
+		default:
+			slog.InfoContext(ctx, "GIN_REQUEST", attrs...)
+		}
 	}
 }