import java.io.IOException;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;
import org.codelibs.fess.cors.CorsHandler;
import org.codelibs.fess.cors.CorsHandlerFactory;
import org.codelibs.fess.util.ComponentUtil;

import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.ServletException;

 * governing permissions and limitations under the License.
 */
package org.codelibs.fess.cors;

import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;

/**
 * Abstract base class for handling CORS (Cross-Origin Resource Sharing) requests.
 * Provides common CORS header constants and defines the processing interface.
 */
public abstract class CorsHandler {

    /**

                                <div class="form-group row">
                                    <label for="suggestWord" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.elevate_word_suggest_word"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="suggestWord"/>

                                    <div class="form-group row">
                                        <label for="name" class="col-sm-2 text-sm-right col-form-label"><la:message
                                                key="labels.name"/></label>
                                        <div class="col-sm-10">
                                            <la:text styleId="name" property="name" styleClass="form-control"/>

                                <div class="form-group row">
                                    <label for="token" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.dict_kuromoji_token"/></label>
                                    <div class="col-sm-9">
                                        <la:errors property="token"/>

                                    <div class="form-group row">
                                        <label for="urlExpr" class="col-sm-2 text-sm-right col-form-label"><la:message
                                                key="labels.boost_document_rule_url_expr"/></label>
                                        <div class="col-sm-10">
                                            <la:text styleId="urlExpr" property="urlExpr" styleClass="form-control"/>

                                <div class="form-group row">
                                    <label for="kuromojiFile" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.dict_kuromoji_file"/></label>
                                    <div class="col-sm-9">
                                        <input type="file" id="kuromojiFile" name="kuromojiFile" class="form-control-file"/>

                                <div class="form-group row">
                                    <label for="charMappingFile" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.dict_mapping_file"/></label>
                                    <div class="col-sm-9">
                                        <input type="file" id="charMappingFile" name="charMappingFile" class="form-control-file"/>

                                <div class="form-group row">
                                    <label for="stopwordsFile" class="col-sm-3 text-sm-right col-form-label"><la:message
                                            key="labels.dict_stopwords_file"/></label>
                                    <div class="col-sm-9">
                                        <input type="file" id="stopwordsFile" name="stopwordsFile" class="form-control-file"/>

            <div class="container-fluid">
                <div class="row mb-2">
                    <div class="col-sm-6">
                        <h1>
                            <la:message key="labels.dict_protwords_title"/>
                        </h1>
                    </div>
                    <div class="col-sm-6">
                        <ol class="breadcrumb float-sm-right">