* EncodingHelper provides utility methods for managing and normalizing character encodings.
 * It allows setting a default encoding, mapping various encoding names to preferred ones,
 * and normalizing an encoding string to its preferred form or the default if no mapping is found.
 */
public class EncodingHelper {

    /** The default encoding to use when no mapping is found */
    protected String defaultEncoding;

 * 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;

        httpClientContext.setCredentialsProvider(credentialsProvider);

        // Request Header
        final RequestHeader[] requestHeaders = { new RequestHeader("enctype", "multipart/form-data") };
        for (final RequestHeader requestHeader : requestHeaders) {
            if (requestHeader.isValid()) {
                requestHeaderList.add(new BasicHeader(requestHeader.getName(), requestHeader.getValue()));

import org.codelibs.fess.crawler.client.AbstractCrawlerClient;
import org.codelibs.fess.crawler.client.AccessTimeoutTarget;
import org.codelibs.fess.crawler.client.http.conn.IdnDnsResolver;
import org.codelibs.fess.crawler.client.http.form.FormScheme;
import org.codelibs.fess.crawler.entity.ResponseData;
import org.codelibs.fess.crawler.entity.RobotsTxt;
import org.codelibs.fess.crawler.exception.CrawlerSystemException;