func putContentsClose(wc *storage.Writer, contents []byte) error {
size := len(contents)
var nn int
var err error
for nn < size {
n, err := wc.Write(contents[nn:size])
nn += n
if err != nil {
break
}
}
if err != nil {
wc.CloseWithError(err)
return err
}
return wc.Close()
}
