*
 * <p>
 * The hreflang attribute tells search engines about alternate versions of a page in different languages
 * or for different regions. This helps search engines serve the correct language or regional URL
 * to searchers.
 * </p>
 *
 * @see <a href="https://developers.google.com/search/docs/specialty/international/localized-versions">Multi-regional and multilingual sites</a>
 */

    }

    /**
     * Checks if HTTP sessions are enabled.
     *
     * @return true if sessions are used, false otherwise
     */
    public boolean isUseSession() {
        return useSession;
    }

    /**
     * Sets whether to use HTTP sessions.
     *
     * @param useSession true to enable sessions, false to disable
     */

<dependency>
  <groupId>org.codelibs</groupId>
  <artifactId>curl4j</artifactId>
  <version>x.y.z</version>
</dependency>
```

See [Maven Central](https://repo1.maven.org/maven2/org/codelibs/curl4j/) for available versions.

### Gradle

```groovy
implementation 'org.codelibs:curl4j:x.y.z'
```

## Quick Start

### Synchronous request

```java
import org.codelibs.curl.Curl;

labels.user_name=Nombre de usuario
labels.login=Iniciar sesión
labels.login.placeholder_username=Nombre de usuario
labels.login.placeholder_password=Contraseña
labels.login.title=Iniciar sesión
labels.index_label=Etiqueta
labels.index_lang=Idioma preferido
labels.index_sort=Ordenar
labels.index_num=Número de resultados
labels.logout_title=Cerrar sesión
labels.logout=Cerrar sesión
labels.do_you_want_to_logout=¿Desea cerrar la sesión?

 * <p>
 * This class now uses the standard {@link java.util.Base64} implementation
 * instead of a custom implementation, providing better security and performance.
 * The API remains backward compatible with previous versions.
 * </p>
 *
 * @author higa
 */
public abstract class Base64Util {

    /**
     * Do not instantiate.
     */
    protected Base64Util() {
    }

    /**
     * Encodes data in Base64.

     */
    @Override
    public void delete(final String sessionId) {
        dataHelper.deleteAccessResultMap(sessionId);
    }

    /**
     * Deletes all access results from all sessions.
     */
    @Override
    public void deleteAll() {
        dataHelper.clearUrlQueueList();
    }

    /**
     * Gets an access result for the specified session and URL.
     *

    }

    public void test_multipleSessionsIndependence() {
        // Setup
        String session1 = "session1";
        String session2 = "session2";

        // Add different filters for different sessions
        service.addIncludeUrlFilter(session1, "https://session1.com/.*");
        service.addIncludeUrlFilter(session2, "https://session2.com/.*");

import software.amazon.awssdk.auth.credentials.AwsBasicCredentials;
import software.amazon.awssdk.auth.credentials.StaticCredentialsProvider;
import software.amazon.awssdk.core.sync.RequestBody;
import software.amazon.awssdk.regions.Region;
import software.amazon.awssdk.services.s3.S3Client;
import software.amazon.awssdk.services.s3.S3ClientBuilder;
import software.amazon.awssdk.services.s3.model.CommonPrefix;

        }

        return bestDelimiter;
    }

    /**
     * Counts occurrences of a character in a string, excluding quoted sections.
     *
     * @param line the line to analyze
     * @param ch the character to count
     * @return the number of occurrences
     */
    protected int countOccurrences(final String line, final char ch) {

    /**
     * News information associated with this URL.
     * Used for Google News Sitemap extension.
     */
    private SitemapNews news;

    /**
     * List of alternate language/region versions of this URL.
     * Used for hreflang annotation.
     */
    private List<SitemapAlternateLink> alternateLinks;

    /**
     * Returns the location URL of this sitemap entry.
     * @return the location URL