public function fileMimeType()
    {
        try {
            $mimeType = $this->storage->mimeType($this->blob->path);
        } catch (\Exception $ex) {
            $ext = pathinfo($this->blob->path, PATHINFO_EXTENSION);
            $mimeType = BlobMetadata::guessMimeType($ext, !!$ext);
        }

        return $mimeType;
    }