/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you 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.apache.ftpserver.command.impl;
import java.io.IOException;
import java.util.List;
import org.apache.ftpserver.command.AbstractCommand;
import org.apache.ftpserver.ftplet.FtpException;
import org.apache.ftpserver.ftplet.FtpReply;
import org.apache.ftpserver.ftplet.FtpRequest;
import org.apache.ftpserver.impl.FtpIoSession;
import org.apache.ftpserver.impl.FtpServerContext;
import org.apache.ftpserver.impl.LocalizedFtpReply;
import org.apache.ftpserver.message.MessageResource;
/**
* <strong>Internal class, do not use directly.</strong>
*
* A new command "LANG" is added to the FTP command set to allow server-FTP
* process to determine in which language to present server greetings and the
* textual part of command responses.
*
* @author <a href="http://mina.apache.org">Apache MINA Project</a>
*/
public class LANG extends AbstractCommand {
/**
* Execute command.
*/
public void execute(final FtpIoSession session,
final FtpServerContext context, final FtpRequest request)
throws IOException, FtpException {
// reset state
session.resetState();
// default language
String language = request.getArgument();
if (language == null) {
session.setLanguage(null);
session.write(LocalizedFtpReply.translate(session, request, context,
FtpReply.REPLY_200_COMMAND_OKAY, "LANG", null));
return;
}
// check and set language
language = language.toLowerCase();
MessageResource msgResource = context.getMessageResource();
List<String> availableLanguages = msgResource.getAvailableLanguages();
if (availableLanguages != null) {
for (int i = 0; i < availableLanguages.size(); ++i) {
if (availableLanguages.get(i).equals(language)) {
session.setLanguage(language);
session.write(LocalizedFtpReply.translate(session, request,
context, FtpReply.REPLY_200_COMMAND_OKAY, "LANG",
null));
return;
}
}
}
// not found - send error message
session.write(LocalizedFtpReply.translate(session, request, context,
FtpReply.REPLY_504_COMMAND_NOT_IMPLEMENTED_FOR_THAT_PARAMETER,
"LANG", null));
}
}