add shield item of config in .gitignore

.gitignore

@@ -24,3 +24,5 @@ go.work
 .vscode
 # Shield all log files in the log folder
 /log/
+# Shield config files in the config folder
+/config/config.yaml

handler/measurement_recommend.go

@@ -66,17 +66,16 @@ func MeasurementRecommendHandler(c *gin.Context) {
 	fmt.Printf("finalOffset:%v\n", finalOffset)
 
 	resultRecommends := make([]string, 0, len(recommends))
-	seen := make(map[string]struct{}) // 使用空结构体节省内存
+	seen := make(map[string]struct{})
 
 	for _, recommend := range recommends {
-		recommendation := recommend[finalOffset:]
-		fmt.Printf("resultRecommend:%s\n", recommendation)
-		fmt.Printf("len of resultRecommend:%d\n", len(recommendation))
-
-		if len(recommendation) != 0 {
-			if _, exists := seen[recommendation]; !exists {
-				seen[recommendation] = struct{}{}
-				resultRecommends = append(resultRecommends, recommendation)
+		recommendTerm := recommend[finalOffset:]
+		fmt.Printf("resultRecommend:%s\n", recommendTerm)
+		fmt.Printf("len of resultRecommend:%d\n", len(recommendTerm))
+		if len(recommendTerm) != 0 {
+			if _, exists := seen[recommendTerm]; !exists {
+				seen[recommendTerm] = struct{}{}
+				resultRecommends = append(resultRecommends, recommendTerm)
 			}
 		}
 	}