import org.apache.commons.lang3.StringUtils;
import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.commons.net.ftp.FTPClient.NatServerResolverImpl;
import org.apache.commons.net.ftp.FTPClientConfig;
import org.apache.commons.net.ftp.FTPFile;
import org.apache.commons.net.ftp.FTPFileFilters;
import org.apache.commons.net.ftp.FTPSClient;
import org.apache.commons.net.util.TrustManagerUtils;

                return "file,smb,ftp";
            }
        });

        final ProtocolHelper protocolHelper = new ProtocolHelper();
        protocolHelper.init();

        assertTrue(protocolHelper.isValidFileProtocol("file:///path/to/file"));
        assertTrue(protocolHelper.isValidFileProtocol("smb://server/share"));
        assertTrue(protocolHelper.isValidFileProtocol("ftp://server/path"));

        // ftp
        assertUrlLink("ftp://www.codelibs.org/", //
                "ftp://www.codelibs.org/");
        assertUrlLink("ftp://www.codelibs.org/あ", //
                "ftp://www.codelibs.org/あ");
        assertUrlLink("ftp://www.codelibs.org/%E3%81%82", //
                "ftp://www.codelibs.org/%E3%81%82");
        assertUrlLink("ftp://www.codelibs.org/%z", //

     *
     * @param url the URL to check
     * @return true if the URL uses a file path protocol (smb, smb1, file, ftp, s3, gcs)
     */
    public boolean isFilePathProtocol(final String url) {
        return url.startsWith("smb:") || url.startsWith("smb1:") || url.startsWith("file:") || url.startsWith("ftp:")
                || url.startsWith("s3:") || url.startsWith("gcs:");
    }

    /**

        return roleTypeList;
    }

    /**
     * Extracts role type information from FTP (File Transfer Protocol) response data.
     * Processes FTP metadata to extract file owner and group information.
     *
     * @param responseData the response data containing FTP metadata
     * @return a list of role type strings extracted from the FTP file permissions
     */

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

import java.net.URI;

import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;
import org.codelibs.core.lang.StringUtil;

/**
 * FtpAuthentication class holds the authentication information for FTP connections.
 * It includes server address, port number, username, and password.

    }

    @Test
    public void test_isFileSystemPath_ftp_protocol() {
        assertTrue(goAction.isFileSystemPath("ftp://ftp.example.com/path/file.txt"));
        assertTrue(goAction.isFileSystemPath("ftp://user:pass@ftp.example.com/file.txt"));
        assertTrue(goAction.isFileSystemPath("ftp://192.168.1.1/file.txt"));
    }

    @Test
    public void test_isFileSystemPath_storage_protocol() {

    }

    @Test
    public void test_convertCrawlingPath_ftp_protocol() {
        assertEquals("ftp://ftp.example.com/path", wizardAction.convertCrawlingPath("ftp://ftp.example.com/path"));
        assertEquals("ftp://192.168.1.1/files", wizardAction.convertCrawlingPath("ftp://192.168.1.1/files"));
    }

    @Test
    public void test_convertCrawlingPath_storage_protocol() {

- **Testing**: JUnit 4, UTFlute, Mockito, Testcontainers
- **Storage**: In-memory (default), OpenSearch (optional)
- **Cloud**: AWS SDK v2 (S3), Google Cloud Storage

### Protocols

HTTP/HTTPS, File, FTP/FTPS, SMB/CIFS (SMB1/SMB2+), Storage (MinIO via `storage://`), S3 (`s3://`), GCS (`gcs://`)

### Content Formats

            public String getCrawlerWebProtocols() {
                return "http,https";
            }

            @Override
            public String getCrawlerFileProtocols() {
                return "file,smb,smb1,ftp,storage,s3,gcs";
            }

            @Override
            public String getCrawlerDocumentFileNameEncoding() {
                return "";
            }

            @Override