golang 使用反射处理 string, 用于 request body 中的 string 字段进行 trim

func trimSpace(any interface{}) {
	ov := reflect.ValueOf(any)
	if ov.Kind() == reflect.Ptr && !ov.IsNil() {
		ov = ov.Elem()
	}
	ot := reflect.TypeOf(any)
	if ot.Kind() == reflect.Ptr {
		ot = ot.Elem()
	}

	for i := 0; i < ot.NumField(); i++ {
		field := ov.Field(i)
		if field.Kind() == reflect.Ptr {
			if field.Elem().Kind() == reflect.Struct {
				trimSpace(field.Interface())
				continue
			}
			field = field.Elem()
		}

		if field.CanInterface() && field.IsValid() {
			if field.Kind() == reflect.String && field.CanSet() {
				filedValue, ok := field.Interface().(string)
				if ok {
					filedValue = strings.TrimSpace(filedValue)
					field.Set(reflect.ValueOf(filedValue))
				}
			}
		}
	}
}