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/*
* Copyright 2008 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* 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.mockftpserver.fake.command;
import org.mockftpserver.core.command.Command;
import org.mockftpserver.core.command.ReplyCodes;
import org.mockftpserver.core.session.Session;
import org.mockftpserver.core.util.StringUtil;
import java.util.List;
/**
* CommandHandler for the NLST command. Handler logic:
* <ol>
* <li>If the user has not logged in, then reply with 530 and terminate</li>
* <li>Send an initial reply of 150</li>
* <li>If the current user does not have read access to the file or directory to be listed, then reply with 550 and terminate</li>
* <li>If an error occurs during processing, then send a reply of 451 and terminate</li>
* <li>If the optional pathname parameter is missing, then send a directory listing for
* the current directory across the data connection</li>
* <li>Otherwise, if the optional pathname parameter specifies a directory or group of files,
* then send a directory listing for the specified directory across the data connection</li>
* <li>Otherwise, if the pathname parameter does not specify an existing directory or group of files,
* then send an empty response across the data connection</li>
* <li>Send a final reply with 226</li>
* </ol>
* The directory listing sent includes filenames only, separated by end-of-line characters.
*
* @author Chris Mair
* @version $Revision$ - $Date$
*/
public class NlstCommandHandler extends AbstractFakeCommandHandler {
protected void handle(Command command, Session session) {
verifyLoggedIn(session);
sendReply(session, ReplyCodes.TRANSFER_DATA_INITIAL_OK);
String path = getRealPath(session, command.getParameter(0));
// User must have read permission to the path
if (getFileSystem().exists(path)) {
this.replyCodeForFileSystemException = ReplyCodes.READ_FILE_ERROR;
verifyReadPermission(session, path);
}
this.replyCodeForFileSystemException = ReplyCodes.SYSTEM_ERROR;
List names = getFileSystem().listNames(path);
String directoryListing = StringUtil.join(names, endOfLine());
directoryListing += directoryListing.length() > 0 ? endOfLine() : "";
session.openDataConnection();
session.sendData(directoryListing.getBytes(), directoryListing.length());
session.closeDataConnection();
sendReply(session, ReplyCodes.TRANSFER_DATA_FINAL_OK);
}
}
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