@PostMapping("/offline")
    @ResponseBody
    public String offline(@RequestBody final URIRegisterDTO offlineDTO) {
        if (Objects.isNull(offlineDTO.getNamespaceId())) {
            offlineDTO.setNamespaceId(Constants.SYS_DEFAULT_NAMESPACE_ID);
        }
        publisher.publish(offlineDTO);
        return ShenyuResultMessage.SUCCESS;
    }
Offline result string.

@param offlineDTO the offline dto
@return the string
shenyu-admin/src/main/java/org/apache/shenyu/admin/controller/ShenyuClientHttpRegistryController.java