func streamToClient(ctx context.Context, w http.ResponseWriter, desc distribution.Descriptor, bw distribution.BlobWriter) error {
setResponseHeaders(w, desc.Size, desc.MediaType, desc.Digest)
reader, err := bw.Reader()
if err != nil {
return err
}
defer reader.Close()
teeReader := io.TeeReader(reader, w)
buf := make([]byte, 32768, 32786)
var soFar int64
for {
rd, err := teeReader.Read(buf)
if err == nil || err == io.EOF {
soFar += int64(rd)
if soFar < desc.Size {
// buffer underflow, keep trying
continue
}
return nil
}
return err
}
}
