}

  public void testBase64Url() {
    testDecodesByBytes(base64Url(), "_zzz", new byte[] {-1, 60, -13});
    testDecodesByBytes(base64Url(), "-zzz", new byte[] {-5, 60, -13});
  }

  public void testBase64UrlInvalidDecodings() {
    assertFailsToDecode(base64Url(), "+zzz", "Unrecognized character: +");
    assertFailsToDecode(base64Url(), "/zzz", "Unrecognized character: /");
  }

  public void testBase32() {

  }

  public void testBase64Url() {
    testDecodesByBytes(base64Url(), "_zzz", new byte[] {-1, 60, -13});
    testDecodesByBytes(base64Url(), "-zzz", new byte[] {-5, 60, -13});
  }

  public void testBase64UrlInvalidDecodings() {
    assertFailsToDecode(base64Url(), "+zzz", "Unrecognized character: +");
    assertFailsToDecode(base64Url(), "/zzz", "Unrecognized character: /");
  }

  public void testBase32() {

   */
  public static BaseEncoding base64() {
    return BASE64;
  }

  private static final BaseEncoding BASE64_URL =
      new Base64Encoding(
          "base64Url()", "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_", '=');

  /**
   * The "base64url" encoding specified by <a
   * href="http://tools.ietf.org/html/rfc4648#section-5">RFC 4648 section 5</a>, Base 64 Encoding

            url.newBuilder()
              .addQueryParameter("hostname", hostname).build(),
          )
          .post(query.toRequestBody(DNS_MESSAGE))
      } else {
        val encoded = query.base64Url().replace("=", "")
        val requestUrl = url.newBuilder().addQueryParameter("dns", encoded).build()

        url(requestUrl)
      }
    }.build()

  class Builder {

    private static final BaseEncoding BASE64_DECODER = BaseEncoding.base64().withSeparator("\n", 64);

    private static final BaseEncoding BASE64URL_DECODER = BaseEncoding.base64Url().withSeparator("\n", 64);

    protected static final String OIC_AUTH_SERVER_URL = "oic.auth.server.url";

    protected static final String OIC_CLIENT_ID = "oic.client.id";

		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 {