private static boolean isAllDigits(final String hostname) {
        for (int i = 0; i < hostname.length(); i++) {
            if (!Character.isDigit(hostname.charAt(i))) {
                return false;
            }
        }
        return true;
    }

    @Override
    public UniAddress getByName(final String hostname) throws UnknownHostException {
        return getByName(hostname, false);
    }

    @Override

# it through port 9000.
services:
  minio1:
    <<: *minio-common
    hostname: minio1
    volumes:
      - data1-1:/data1
      - data1-2:/data2

  minio2:
    <<: *minio-common
    hostname: minio2
    volumes:
      - data2-1:/data1
      - data2-2:/data2

  minio3:
    <<: *minio-common
    hostname: minio3
    volumes:
      - data3-1:/data1
      - data3-2:/data2

  minio4:

    }

    @Test
    @DisplayName("Should handle null hostname in getByName")
    void testGetByNameWithNull() {
        // When/Then
        assertThrows(UnknownHostException.class, () -> {
            nameServiceClient.getByName(null);
        }, "Should throw UnknownHostException for null hostname");
    }

    @Test
    @DisplayName("Should handle empty hostname in getByName")
    void testGetByNameWithEmpty() {

            final int localPort, final String hostName, final boolean nonPooled) {
        return getSmbTransport(tc, address, port, localAddr, localPort, hostName, nonPooled, false);
    }

    @Override
    public SmbTransportImpl getSmbTransport(final CIFSContext tc, final Address address, int port, final InetAddress localAddr,
            final int localPort, final String hostName, final boolean nonPooled, final boolean forceSigning) {

        // Simple implementation - could be enhanced with proper cluster discovery
        String hostname = serverAddress.getHostName();
        if (hostname != null && hostname.contains(".")) {
            // Extract potential cluster name from hostname
            String[] parts = hostname.split("\\.");
            if (parts.length > 1) {
                return parts[0]; // Use first part as cluster name

    }

    /**
     * Gets the hostname of the local machine.
     *
     * @return The hostname.
     */
    public String getHostname() {
        final Map<String, String> env = getEnvMap();
        if (env.containsKey("COMPUTERNAME")) {
            return env.get("COMPUTERNAME");
        }
        if (env.containsKey("HOSTNAME")) {
            return env.get("HOSTNAME");
        }
        try {

        }

        // Check for valid hostname or IP address
        // Simple validation - can be enhanced
        if (host.length() > 255) {
            return false;
        }

        // Check for invalid characters
        if (host.contains("..") || host.contains("//") || host.contains("\\\\")) {
            return false;
        }

        // Basic hostname/IP validation

{* ../../docs_src/advanced_middleware/tutorial002.py hl[2,6:8] *}

The following arguments are supported:

* `allowed_hosts` - A list of domain names that should be allowed as hostnames. Wildcard domains such as `*.example.com` are supported for matching subdomains. To allow any hostname either use `allowed_hosts=["*"]` or omit the middleware.

        try (SmbSessionImpl sess = getSession(); SmbTransportImpl transport = sess.getTransport()) {
            synchronized (transport) {

                // this needs to be done before the reference to the remote hostname later
                transport.ensureConnected();

                if (waitForState(transport) == 2) {
                    // already connected
                    return null;
                }

        }

        final String hostName = loc.getServerWithDfs();
        final String path = loc.getType() == SmbConstants.TYPE_SHARE || loc.getUNCPath() == null || "\\".equals(loc.getUNCPath()) ? null
                : loc.getUNCPath();
        String share = loc.getShare();

        final DfsReferralData start = referral != null ? referral : this.ctx.getDfs().resolve(this.ctx, hostName, loc.getShare(), path);