site.java

来自「JAVA FTP 上传下载 的源文件」· Java 代码 · 共 112 行

/*
 * 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.HashMap;

import org.apache.ftpserver.command.AbstractCommand;
import org.apache.ftpserver.command.Command;
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.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * <strong>Internal class, do not use directly.</strong>
 * 
 * Handle SITE command.
 *
 * @author The Apache MINA Project ([e-mail])
 * @version $Rev: 711534 $, $Date: 2008-11-05 09:48:47 +0100 (Wed, 05 Nov 2008) $
 */
public class SITE extends AbstractCommand {

    private final Logger LOG = LoggerFactory.getLogger(SITE.class);

    private static final HashMap<String, Command> COMMAND_MAP = new HashMap<String, Command>(
            16);

    /**
     * Execute command.
     */
    public void execute(final FtpIoSession session,
            final FtpServerContext context, final FtpRequest request)
            throws IOException, FtpException {

        // get request name
        String argument = request.getArgument();
        if (argument != null) {
            int spaceIndex = argument.indexOf(' ');
            if (spaceIndex != -1) {
                argument = argument.substring(0, spaceIndex);
            }
            argument = argument.toUpperCase();
        }

        // no params
        if (argument == null) {
            session.resetState();
            session.write(LocalizedFtpReply.translate(session, request, context,
                    FtpReply.REPLY_200_COMMAND_OKAY, "SITE", null));
            return;
        }

        // call appropriate command method
        String siteRequest = "SITE_" + argument;
        Command command = (Command) COMMAND_MAP.get(siteRequest);
        try {
            if (command != null) {
                command.execute(session, context, request);
            } else {
                session.resetState();
                session.write(LocalizedFtpReply.translate(session, request, context,
                        FtpReply.REPLY_502_COMMAND_NOT_IMPLEMENTED, "SITE",
                        argument));
            }
        } catch (Exception ex) {
            LOG.warn("SITE.execute()", ex);
            session.resetState();
            session.write(LocalizedFtpReply.translate(session, request, context,
                    FtpReply.REPLY_500_SYNTAX_ERROR_COMMAND_UNRECOGNIZED,
                    "SITE", null));
        }

    }

    // initialize all the SITE command handlers
    static {
        COMMAND_MAP.put("SITE_DESCUSER",
                new org.apache.ftpserver.command.impl.SITE_DESCUSER());
        COMMAND_MAP.put("SITE_HELP",
                new org.apache.ftpserver.command.impl.SITE_HELP());
        COMMAND_MAP.put("SITE_STAT",
                new org.apache.ftpserver.command.impl.SITE_STAT());
        COMMAND_MAP
                .put("SITE_WHO", new org.apache.ftpserver.command.impl.SITE_WHO());
        COMMAND_MAP.put("SITE_ZONE",
                new org.apache.ftpserver.command.impl.SITE_ZONE());
    }
}