public abstract class CharEscaper extends Escaper {
  /** Constructor for use by subclasses. */
  protected CharEscaper() {}

  /**
   * Returns the escaped form of a given literal string.
   *
   * @param string the literal string to be escaped
   * @return the escaped form of {@code string}
   * @throws NullPointerException if {@code string} is null
   */
  @Override
  public String escape(String string) {

///

And if you click it, you have a little authorization form to type a `username` and `password` (and other optional fields):

<img src="/img/tutorial/security/image02.png">

/// note

It doesn't matter what you type in the form, it won't work yet. But we'll get there.

///

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND,
 * either express or implied. See the License for the specific language
 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.crawler.client.http.form;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
import java.util.function.BiConsumer;

	if objLayer == nil {
		return
	}

	ctx, cancel := context.WithTimeout(ctx, globalAPIConfig.getClusterDeadline())
	defer cancel()

	opts := HealthOptions{
		Maintenance:    r.Form.Get("maintenance") == "true",
		DeploymentType: r.Form.Get("deployment-type"),
	}
	result := objLayer.Health(ctx, opts)
	w.Header().Set(xhttp.MinIOWriteQuorum, strconv.Itoa(result.WriteQuorum))

import jakarta.validation.constraints.Size;

/**
 * Form class for deleting documents from search results in the admin interface.
 * Contains query and document ID fields for targeted document deletion.
 */
public class DeleteForm {

    /**
     * Creates a new instance of DeleteForm.
     * This constructor initializes the form for deleting documents from search results

import java.util.HashMap;
import java.util.Map;

import org.lastaflute.web.validation.Required;

import jakarta.validation.constraints.Size;

/**
 * Form class for handling "go" requests that redirect users to specific documents
 * or search results. This form captures the necessary parameters for document
 * access tracking and error page fallback information.
 *
 */
public class GoForm {

    /**

    }

    /**
     * Upload a file.
     * @param form The upload form.
     * @return The HTML response.
     */
    @Execute
    @Secured({ ROLE })
    public HtmlResponse upload(final UploadForm form) {
        validate(form, messages -> {}, this::asListHtml);
        verifyToken(this::asListHtml);
        final String fileName = form.bulkFile.getFileName();

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.design;

/**
 * Form class for editing design files in the admin interface.
 * This form handles the editing of template and design files used
 * for customizing the search interface appearance and layout.
 */
public class EditForm {

    /**

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.app.web.admin.elevateword;

/**
 * The download form for Elevate Word.
 * This form is used for downloading elevate word configurations from the admin interface.
 *
 */
public class DownloadForm {

    /**
     * Default constructor.
     */
    public DownloadForm() {

import org.lastaflute.web.ruts.multipart.MultipartFormFile;
import org.lastaflute.web.validation.Required;

import jakarta.validation.constraints.Pattern;

/**
 * Form for uploading design files to customize the appearance of the Fess search interface.
 * This form is used in the admin interface to upload CSS, JSP, and other design-related files
 * that customize the look and feel of the search application.
 */
public class UploadForm {