}
    }

    // Test with different hostnames
    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

  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);

    // 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()

package okhttp3.internal

import okhttp3.internal.idn.IDNA_MAPPING_TABLE
import okhttp3.internal.idn.Punycode
import okio.Buffer

/**
 * Quick and dirty pattern to differentiate IP addresses from hostnames. This is an approximation
 * of Android's private InetAddress#isNumeric API.
 *
 * This matches IPv6 addresses as a hex string containing at least one colon, and possibly

   * @param pattern domain name pattern from certificate. May be a wildcard pattern such as
   *     `*.android.com`.
   */
  private fun verifyHostname(
    hostname: String?,
    pattern: String?,
  ): Boolean {
    var hostname = hostname
    var pattern = pattern
    if (hostname.isNullOrEmpty() ||
      hostname.startsWith(".") ||
      hostname.endsWith("..")
    ) {

 * <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
     */

			}
		}
	}
	return ""
}

// Hostnames - returns list of unique hostnames
func (l EndpointServerPools) Hostnames() []string {
	foundSet := set.NewStringSet()
	for _, ep := range l {
		for _, endpoint := range ep.Endpoints {
			if foundSet.Contains(endpoint.Hostname()) {
				continue
			}
			foundSet.Add(endpoint.Hostname())
		}
	}
	return foundSet.ToSlice()
}

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 {

{* ../../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.