org.mockftpserver.stub.command.PasvCommandHandler Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of MockFtpServer Show documentation

The MockFtpServer project provides mock/dummy FTP server implementations for testing FTP client code. Two FTP Server implementations are provided, each at a different level of abstraction. FakeFtpServer provides a higher-level abstraction. You define a virtual file system, including directories and files, as well as a set of valid user accounts and credentials. The FakeFtpServer then responds with appropriate replies and reply codes based on that configuration. StubFtpServer, on the other hand, is a lower-level "stub" implementation. You configure the individual FTP server commands to return custom data or reply codes, allowing simulation of either success or failure scenarios. You can also verify expected command invocations.

There is a newer version: 3.2.0

Show newest version

/*
 * Copyright 2007 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.stub.command;

import org.mockftpserver.core.command.Command;
import org.mockftpserver.core.command.CommandHandler;
import org.mockftpserver.core.command.InvocationRecord;
import org.mockftpserver.core.command.ReplyCodes;
import org.mockftpserver.core.session.Session;
import org.mockftpserver.core.util.Assert;
import org.mockftpserver.core.util.PortParser;

import java.io.IOException;
import java.net.InetAddress;

/**
 * CommandHandler for the PASV (Passove Mode) command. Request the Session to switch to passive
 * data connection mode. Return a reply code of 227, along with response text of the form:
 * "Entering Passive Mode. (h1,h2,h3,h4,p1,p2)", where h1..h4 are the 4
 * bytes of the 32-bit internet host address of the server, and p1..p2 are the 2
 * bytes of the 16-bit TCP port address of the data connection on the server to which
 * the client must connect. See RFC959 for more information.
 * 
 * Each invocation record stored by this CommandHandler contains no data elements.
 *
 * @author Chris Mair
 */
public class PasvCommandHandler extends AbstractStubCommandHandler implements CommandHandler {

    /**
     * Constructor. Initialize the replyCode.
     */
    public PasvCommandHandler() {
        setReplyCode(ReplyCodes.PASV_OK);
    }

    /**
     * @throws IOException - if an error occurs
     * @see org.mockftpserver.core.command.CommandHandler#handleCommand(org.mockftpserver.core.command.Command, org.mockftpserver.core.session.Session)
     */
    public void handleCommand(Command command, Session session, InvocationRecord invocationRecord)
            throws IOException {

        int port = session.switchToPassiveMode();
        InetAddress server = session.getServerHost();

        Assert.isTrue(port > -1, "The server-side port is invalid: " + port);
        LOG.debug("server=" + server + " port=" + port);
        String hostAndPort = "(" + PortParser.convertHostAndPortToCommaDelimitedBytes(server, port) + ")";

        sendReply(session, hostAndPort);
    }

}