refactor: usefilebuffer on writter

internal/services/backblaze.go

@@ -123,6 +123,7 @@ func (b *BackBalze) Sync(ctx context.Context) error {
 					msg, err := copyFile(ctx, bc, src)
 					if err != nil {
 						log.Printf("error copying file %s: %v\n", src, err)
+						continue
 					}
 					msgsChan <- msg
 				}
@@ -261,28 +262,27 @@ func (b *BackBalze) OldSync() error {
 	return nil
 }
 
-func copyFile(ctx context.Context, bucket *b2.Bucket, src string) (UploadMessage, error) {
+func copyFile(ctx context.Context, bucket *b2.Bucket, src string) error {
 	f, err := os.Open(src)
 	if err != nil {
-		return UploadMessage{}, err
+		return err
 	}
 	defer f.Close()
 	fi, err := f.Stat()
 	if err != nil {
-		return UploadMessage{}, err
+		return err
 	}
 	w := bucket.Object(fi.Name()).NewWriter(ctx)
 	w.ConcurrentUploads = writers
-	msg := UploadMessage{
-		key:     fi.Name(),
-		startAt: time.Now(),
-	}
+	// w.ChunkSize = 1e9 / 2
+	w.UseFileBuffer = true
+	log.Println("start copying", fi.Name())
 	if _, err := io.Copy(w, f); err != nil {
 		w.Close()
-		return msg, err
+		return err
 	}
-	msg.endAt = time.Now()
-	return msg, w.Close()
+	log.Println("end copying", fi.Name())
+	return w.Close()
 }
 
 func cleanBucket(ctx context.Context, bucket *b2.Bucket, files []string) error {