feat: option to change file hash when update to webdav

pkg/utils/utils.go

@@ -1,6 +1,7 @@
 package utils
 
 import (
+	"os"
 	"regexp"
 	"strconv"
 	"strings"
@@ -146,3 +147,16 @@ func AvailableSpace(dir string) uint64 {
 	unix.Statfs(dir, &stat)
 	return stat.Bavail * uint64(stat.Bsize)
 }
+
+func ChangeFileHash(name string) error {
+	f, err := os.OpenFile(name, os.O_APPEND|os.O_WRONLY, 0655)
+	if err != nil {
+		return errors.Wrap(err, "open file")
+	}
+	defer f.Close()
+	_, err = f.Write([]byte("\000"))
+	if err != nil {
+		return errors.Wrap(err, "write file")
+	}
+	return nil
+}