fix service api (#556)

* fix service api

* update ServiceResponseItem

* fix: ddns lock

service/singleton/ddns.go

@@ -19,6 +19,7 @@ var (
 	DDNSCache     map[uint64]*model.DDNSProfile
 	DDNSCacheLock sync.RWMutex
 	DDNSList      []*model.DDNSProfile
+	DDNSListLock  sync.RWMutex
 )
 
 func initDDNS() {
@@ -52,6 +53,9 @@ func UpdateDDNSList() {
 	DDNSCacheLock.RLock()
 	defer DDNSCacheLock.RUnlock()
 
+	DDNSListLock.Lock()
+	defer DDNSListLock.Unlock()
+
 	DDNSList = make([]*model.DDNSProfile, 0, len(DDNSCache))
 	for _, p := range DDNSCache {
 		DDNSList = append(DDNSList, p)