}
    }

    /**
     * Sets the HC4 HTTP client instance.
     *
     * @param hc4Client the HC4 HTTP client
     */
    public void setHc4Client(final CrawlerClient hc4Client) {
        this.hc4Client = hc4Client;
    }

    /**
     * Gets the HC4 HTTP client instance.
     *
     * @return the HC4 HTTP client
     */
    public CrawlerClient getHc4Client() {
        return hc4Client;

import org.apache.http.auth.AuthScheme;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.Credentials;

/**
 * Authentication class for Apache HttpComponents 4.x (HC4).
 * This class provides methods to handle authentication details such as
 * authentication scope, credentials, and authentication scheme.
 *
 * <p>
 * It includes constructors to initialize these details and getter and setter

 */
package org.codelibs.fess.crawler.client.http.config;

import java.util.Date;

/**
 * POJO configuration for HTTP cookies that can be converted to
 * either HC4 Cookie or HC5 Cookie.
 *
 * <p>This class provides a library-independent way to configure
 * cookies that work with both Apache HttpComponents 4.x
 * and 5.x clients.</p>
 *
 * <p>Example usage:</p>
 * <pre>{@code

		instance="prototype">
		<property name="connectionTimeout">15000</property>
		<property name="soTimeout">30000</property>
	</component>

	<!-- HC4 (Alternative - for backward compatibility) -->
	<component name="internalHc4HttpClient" class="org.codelibs.fess.crawler.client.http.Hc4HttpClient"
		instance="prototype">
		<property name="connectionTimeout">15000</property>

/**
 * HcHttpClient is the abstract base class for HTTP client implementations
 * using Apache HttpComponents. This class provides common constants and
 * configurations shared between HC4 and HC5 implementations.
 *
 * <p>Key properties and configurations:</p>
 * <ul>
 *   <li>CONNECTION_TIMEOUT_PROPERTY: Connection timeout setting.</li>
 *   <li>SO_TIMEOUT_PROPERTY: Socket timeout setting.</li>

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.client.http.config;

/**
 * POJO configuration for credentials that can be converted to
 * either HC4 Credentials or HC5 Credentials.
 *
 * <p>This class provides a library-independent way to configure
 * authentication credentials that work with both Apache HttpComponents 4.x
 * and 5.x clients.</p>
 *

                config.getPassword() != null ? config.getPassword().toCharArray() : null);
    }

    /**
     * Converts HC4 Hc4Authentication array to HC5 Hc5Authentication array.
     * This provides backward compatibility for existing configurations.
     *
     * @param hc4Auths the HC4 authentication array
     * @return the HC5 authentication array
     */

 */
package org.codelibs.fess.crawler.client.http.config;

import java.util.Map;

/**
 * POJO configuration for web authentication that can be converted to
 * either HC4 Hc4Authentication or HC5 Hc5Authentication.
 *
 * <p>This class provides a library-independent way to configure
 * HTTP authentication that works with both Apache HttpComponents 4.x
 * and 5.x clients.</p>
 *

    └── Hc4HttpClient (fallback) - Apache HttpComponents 4.x

HcHttpClient (abstract base class)
    ├── Hc4HttpClient
    └── Hc5HttpClient
```

Switch via system property: `-Dfess.crawler.http.client=hc4` or `hc5` (default)

**Key Properties**: `connectionTimeout`, `soTimeout`, `proxyHost`, `proxyPort`, `userAgent`, `robotsTxtEnabled`, `ignoreSslCertificate`, `maxTotalConnection`, `defaultMaxConnectionPerRoute`

        if (value == null) {
            return new Hc4Authentication[0];
        }

        // If already HC4 Hc4Authentication[], return directly
        if (value instanceof Hc4Authentication[]) {
            return (Hc4Authentication[]) value;
        }

        // If common POJO config, convert to HC4
        if (value instanceof WebAuthenticationConfig[]) {