}
    }

    // Test with different hostnames
    @Test
    public void test_differentHostnames() {
        String[] hostnames = { "smtp.gmail.com", "mail.example.com", "localhost", "192.168.1.1" };

        for (String hostname : hostnames) {
            ComponentUtil.setFessConfig(new FessConfig.SimpleImpl() {

 * crawling from duplicate hostnames to the regular canonical hostname.
 */
public class CreateForm {

    /**
     * Creates a new CreateForm instance.
     */
    public CreateForm() {
    }

    /** The CRUD operation mode for form processing */
    @ValidateTypeFailure
    public Integer crudMode;

    /** The regular canonical hostname that should be used */
    @Required

    // https://github.com/bcgit/bc-java/issues/1773
    if (!platform.isBouncyCastle()) {
      assertThat(recordedRequest.handshakeServerNames).containsExactly(url.host)
    }
  }

  /**
   * Use different hostnames for the TLS handshake (including SNI) and the HTTP request (in the
   * Host header).
   */
  @Test
  fun domainFronting() {
    val heldCertificate =
      HeldCertificate
        .Builder()

  private final Set<HttpUrl> fetchedUrls = Collections.synchronizedSet(new LinkedHashSet<>());
  private final BlockingQueue<HttpUrl> queue;
  private final ConcurrentHashMap<String, AtomicInteger> hostnames = new ConcurrentHashMap<>();
  private final int hostLimit;

  public Crawler(OkHttpClient client, int queueLimit, int hostLimit) {
    this.client = client;
    this.queue = new LinkedBlockingQueue<>(queueLimit);

    }
  }

  /** Returns true if [certificate] matches [hostname]. */
  private fun verifyHostname(
    hostname: String,
    certificate: X509Certificate,
  ): Boolean {
    val hostname = hostname.asciiToLowercase()
    return getSubjectAltNames(certificate, ALT_DNS_NAME).any {
      verifyHostname(hostname, it)
    }
  }

  /**

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.

 * <p>
 * This class should be used in favor of {@code InetAddress} to resolve
 * hostnames on LANs and WANs that support a mixture of NetBIOS/WINS and
 * DNS resolvable hosts.
 */

public class UniAddress implements Address {

    /**
     * Check whether a hostname is actually an ip address
     *
     * @param hostname the hostname to check
     * @return whether this is an IP address
     */

        // IPv4 addresses - should remain unchanged
        assertEquals("127.0.0.1", IpAddressUtil.formatForUrl("127.0.0.1"));
        assertEquals("192.168.1.1", IpAddressUtil.formatForUrl("192.168.1.1"));

        // Hostnames - should remain unchanged
        assertEquals("localhost", IpAddressUtil.formatForUrl("localhost"));
        assertEquals("example.com", IpAddressUtil.formatForUrl("example.com"));

        // Null

import jakarta.annotation.PostConstruct;

/**
 * Helper class for managing duplicate host configurations in the Fess search system.
 * This class handles URL conversion based on duplicate host rules, allowing multiple
 * hostnames or URLs to be treated as equivalent for crawling and indexing purposes.
 * It maintains a list of DuplicateHost rules and applies them to URLs.
 *
 */
public class DuplicateHostHelper {

 * duplicate host configurations used by the Fess crawler system.
 *
 * <p>Duplicate host configurations allow administrators to define hostname patterns
 * that should be treated as equivalent during crawling. This helps avoid indexing
 * duplicate content from the same logical site that may be accessible via different
 * hostnames (e.g., www.example.com and example.com).</p>
 */
public class DuplicateHostService extends FessAppService {

    /**