com.myJava.file.driver.remote.ftp.FTPClient.java Source code

Introduction

Here is the source code for com.myJava.file.driver.remote.ftp.FTPClient.java

Source

package com.myJava.file.driver.remote.ftp;

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

import org.apache.commons.net.MalformedServerReplyException;
import org.apache.commons.net.ftp.FTPReply;

import com.myJava.util.log.Logger;

/**
 * <BR>
 * @author Olivier PETRUCCI
 * <BR>
 *
 */

/*
Copyright 2005-2015, Olivier PETRUCCI.
    
This file is part of Areca.
    
Areca is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
    
Areca is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
    
You should have received a copy of the GNU General Public License
along with Areca; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
    
*/
public class FTPClient extends org.apache.commons.net.ftp.FTPClient {

    private boolean ignorePasvErrors = false;

    public FTPClient(boolean ignorePasvErrors) {
        super();
        this.ignorePasvErrors = ignorePasvErrors;
    }

    public int pasv() throws IOException {
        int passiveReturnCode = super.pasv();

        if (passiveReturnCode == FTPReply.ENTERING_PASSIVE_MODE) {

            // Parse and display reply host and port in passive mode
            // It's quite ugly but there is no entry point in apache's ftp library to perform this check.
            String reply = getReplyStrings()[0];
            int i, index, lastIndex;
            String octet1, octet2;
            StringBuffer host;

            reply = reply.substring(reply.indexOf('(') + 1, reply.indexOf(')')).trim();

            host = new StringBuffer(24);
            lastIndex = 0;
            index = reply.indexOf(',');
            host.append(reply.substring(lastIndex, index));

            for (i = 0; i < 3; i++) {
                host.append('.');
                lastIndex = index + 1;
                index = reply.indexOf(',', lastIndex);
                host.append(reply.substring(lastIndex, index));
            }

            lastIndex = index + 1;
            index = reply.indexOf(',', lastIndex);

            octet1 = reply.substring(lastIndex, index);
            octet2 = reply.substring(index + 1);

            // index and lastIndex now used as temporaries
            try {
                index = Integer.parseInt(octet1);
                lastIndex = Integer.parseInt(octet2);
            } catch (NumberFormatException e) {
                throw new MalformedServerReplyException(
                        "Could not parse passive host information.\nServer Reply: " + reply);
            }

            index <<= 8;
            index |= lastIndex;

            String passvHost = host.toString();

            //int passvPort = index;
            //Logger.defaultLogger().info("Passive host received from server : " + passvHost + ":" + passvPort);

            InetAddress refAddress = InetAddress.getByName(passvHost);
            if (!refAddress.equals(this._socket_.getInetAddress())) {
                String msg = "Passive address (" + refAddress + ") differs from host address ("
                        + this._socket_.getInetAddress()
                        + "). This is probably because your server is behind a router. Please check your FTP server's configuration. (for instance, use a masquerade address)";
                Logger.defaultLogger().warn(msg);
                if (!ignorePasvErrors) {
                    throw new IOException(msg);
                }
            }
        }

        return passiveReturnCode;
    }
}