protected String normalizeCanonicalUrl(final String baseUrl, final String canonicalUrl) {
        try {
            final URL u = new URL(baseUrl);
            return new URL(u, canonicalUrl.startsWith(":") ? u.getProtocol() + canonicalUrl : canonicalUrl).toString();
        } catch (final MalformedURLException e) {
            logger.warn("Invalid canonical url: {} : {}", baseUrl, canonicalUrl, e);
        }
        return null;
    }

		readDirFn(pathJoin(drivePath, minioMetaMultipartBucket, shaDir), func(uploadIDDir string, typ os.FileMode) error {
			uploadIDPath := pathJoin(shaDir, uploadIDDir)
			var modTime time.Time
			// Upload IDs are of the form base64_url(<UUID>x<UnixNano>), we can extract the time from the UUID.
			if b64, err := base64.RawURLEncoding.DecodeString(uploadIDDir); err == nil {
				if split := strings.Split(string(b64), "x"); len(split) == 2 {