在开发中遇到一个奇怪问题,如果正则匹配中出现了+
开头的去匹配资源名和描述时候,会导致报错,代码如下:
// 模糊匹配资源名&描述 if searchBy := appG.C.DefaultQuery("searchBy", ""); searchBy != "" { regex := bson.M{"$regex": searchBy} or := []bson.M{{"name": regex}, {"description": regex}} BsonM := bson.M{ "$or": or, } query = append(query, BsonM) }
会出现报错情况:
Regular expression is incalid: nothing to repeat
所以自己写了一个正则匹配特殊字符转换的小函数:
// 模糊匹配资源名&描述 if searchBy := appG.C.DefaultQuery("searchBy", ""); searchBy != "" { EscapeString := CheckRegexString1(searchBy) log.Println(EscapeString) regex := bson.M{"$regex": EscapeString} or := []bson.M{{"name": regex}, {"description": EscapeString}} BsonM := bson.M{ "$or": or, } query = append(query, BsonM) } func CheckRegexString1(str string) string { //正则匹配出现的特殊字符串 fbsArr := []string{"\\", "$", "(", ")", "*", "+", ".", "[", "]", "?", "^", "{", "}", "|"} for _, ch := range fbsArr { if StrContainers := strings.Contains(str, ch); StrContainers == true { str = strings.Replace(str, ch, "\\"+ch, -1) } } return str }
功能目前上线后跑起来是正常的,需要后续观察一下时候存在一些特殊的字符没有包括进来。