package xdsconfig import ( "encoding/xml" "fmt" "os" common "github.com/iotbzh/xds-common/golib" uuid "github.com/satori/go.uuid" "github.com/syncthing/syncthing/lib/sync" ) // xmlServerData contains persistent data stored/loaded by server type xmlServerData struct { XMLName xml.Name `xml:"XDS-Server"` Version string `xml:"version,attr"` Data ServerData `xml:"server-data"` } type ServerData struct { ID string `xml:"id"` } var sdMutex = sync.NewMutex() // ServerIDGet func ServerIDGet() (string, error) { var f string var err error d := ServerData{} if f, err = ServerDataFilenameGet(); err != nil { return "", err } if err = serverDataRead(f, &d); err != nil || d.ID == "" { // Create a new uuid when not found d.ID = uuid.NewV1().String() if err := serverDataWrite(f, d); err != nil { return "", err } } return d.ID, nil } // serverDataRead reads data saved on disk func serverDataRead(file string, data *ServerData) error { if !common.Exists(file) { return fmt.Errorf("No folder config file found (%s)", file) } sdMutex.Lock() defer sdMutex.Unlock() fd, err := os.Open(file) defer fd.Close() if err != nil { return err } xsd := xmlServerData{} err = xml.NewDecoder(fd).Decode(&xsd) if err == nil { *data = xsd.Data } return err } // serverDataWrite writes persistant data to disk func serverDataWrite(file string, data ServerData) error { sdMutex.Lock() defer sdMutex.Unlock() fd, err := os.OpenFile(file, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0666) defer fd.Close() if err != nil { return err } xsd := &xmlServerData{ Version: "1", Data: data, } enc := xml.NewEncoder(fd) enc.Indent("", " ") return enc.Encode(xsd) }