ftpconnection.java

一个JAVA做的FTP软件,带源码的,可以很好的进行二次开发,,并带有详细说明文件的

/*
 * This program 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.
 *
 * This program 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 this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
package net.sf.jftp.net;


//***now all config files are imported
import net.sf.jftp.config.*;
import net.sf.jftp.util.Log;
import net.sf.jftp.util.StringUtils;

import java.io.*;

import java.net.*;

import java.util.*;


/**
 * All control transactions are made here.
 * See doc/FtpDownload.java for examples and note
 * that this class is event-driven and not Exception-based!
 * You might want to take a look at ConnectionListener, too.
 *
 * @author  David Hansmann, [e-mail]
 * @version 1.30+, June 2003
 */
public class FtpConnection implements BasicConnection, FtpConstants
{
    private static final boolean TESTMODE = false;

    // everything starting with this will be treated
    // as a negative response
    private final static String NEGATIVE = "5";
    private final static String NEGATIVE2 = "4";

    // everything starting with this will be treated
    // as a positive response
    private final static String POSITIVE = "2";

    // for resuming
    private final static String PROCEED = "3"; //"350";
    private final static char MORE_LINES_APPENDED = '-';

    /** Internal download constant */
    public final static String DOWNLOAD = "DOWNLOAD";

    /** Internal upload constant */
    public final static String UPLOAD = "UPLOAD";

    /** Internal abort command constant */
    public final static String ABOR = "ABOR";

    //*** 1.44: if LIST is not set, then load it from advanced settings
    //***       And if the file for it is not found, then create it
    //***       with LIST -laL as the default
    public static String LIST_DEFAULT = "LIST -laL";
    public static String LIST = "default";
    public final static String ASCII = "A";
    public final static String BINARY = "I";
    public final static String EBCDIC = "E";
    public final static String L8 = "L 8";
    public final static String STREAM = "S";
    public final static String BLOCKED = "B";
    public final static String COMPRESSED = "C";
    private static boolean useStream = true;
    private static boolean useBlocked = true;
    private static boolean useCompressed = true;

    //***

    /**
    *        Used to determine the type of transfer.
    */
    public boolean hasUploaded = false;
    public boolean work = true;
    private boolean msg = true;
    private boolean ok = true;
    private String pwd = "";
    private String initCWD = Settings.defaultDir;
    private String[] loginAck = new String[]
                                {
                                    FTP331_USER_OK_NEED_PASSWORD,
                                    FTP230_LOGGED_IN
                                };
    private String osType;
    private String dataType;
    private FtpTransfer lastTransfer = null;
    private boolean modeStreamSet = false;
    private DataConnection dcon = null;
    private Vector listeners = new Vector();
    private ConnectionHandler handler = new ConnectionHandler();

    // directory downloaded to
    private String localPath = null;

    // active ftp ports
    private int porta = 5; // 5 * 256 + 1 = 1281
    private int portb = 1;

    /** the host */
    private String host = "";

    /** the user */
    private String username;

    /** the password */
    private String password;

    /** the port */
    private int port = 21;

    /** the InputStream of the control connection */
    private BufferedReader in;

    /** the OutputStream of the control connection */
    private JConnection jcon;

    /** we are disconnected */
    private boolean connected = false;
    private boolean shortProgress = false;
    private boolean isDirUpload = false;
    private String baseFile;
    private int fileCount;
    private String typeNow = "";
    
    /**
    * May contain date listing
    */
    public Vector dateVector = new Vector();

    /**
    * Create an instance with a given host
    *
    * @param host The host to connect to
    */
    public FtpConnection(String host)
    {
        this.host = host;

        File f = new File(".");
        setLocalPath(f.getAbsolutePath());
    }

    /**
    * Create an instance with a given host, port and initial remote working directory
    *
    * @param host The host to connect to
    * @param port The port used for the control connection, usually 21
    * @param initCWD The initial remote working directory
    */
    public FtpConnection(String host, int port, String initCWD)
    {
        this.host = host;
        this.port = port;
        this.initCWD = initCWD;

        File f = new File(".");
        setLocalPath(f.getAbsolutePath());
    }

    /**
    * Connect to the server an log in.
    *
    * Does also fire directory update and connection initialized event if successful or
    * connection failed event if failed.
    *
    * @param username The username
    * @param password  The password
    * @return  WRONG_LOGIN_DATA, OFFLINE, GENERIC_FAILED or LOGIN_OK status code
    */
    public int login(String username, String password)
    {
        this.username = username;
        this.password = password;

        int status = LOGIN_OK;

        if(msg)
        {
            Log.debug("Connecting to " + host);
        }

        jcon = new JConnection(host, port);

        if(jcon.isThere())
        {
            in = jcon.getReader();

            if(getLine(FTP220_SERVICE_READY) == null)
            {
                ok = false;
                Log.debug("Server closed Connection, maybe too many users...");
                status = OFFLINE;
            }

            if(msg)
            {
                Log.debug("Connection established...");
            }

            jcon.send(USER + " " + username);

            if(!getLine(loginAck).startsWith(FTP230_LOGGED_IN))
            {
                jcon.send(PASS + " " + password);

                if(success(FTP230_LOGGED_IN))
                {
                    if(msg)
                    {
                        Log.debug("Logged in...");
                    }
                }
                else
                {
                    Log.debug("Wrong password!");
                    ok = false;
                    status = WRONG_LOGIN_DATA;
                }
            }

            // end if(jcon)...
        }
        else
        {
            if(msg)
            {
                Log.debug("FTP not available!");
                ok = false;
                status = GENERIC_FAILED;
            }
        }

        if(ok)
        {
            connected = true;
            system();
            binary();

            if(initCWD.trim().equals(Settings.defaultDir) ||
                   !chdirNoRefresh(initCWD))
            {
                //System.out.println("default dir...");
                //if(!chdirNoRefresh(getPWD()))
                //{
                //System.out.println("FtpConnection should not do this...");
                //	if(!chdirNoRefresh("~"))
                //	{
                //  		chdirNoRefresh("/");
                //	}
                //}
                updatePWD();
            }

            //Array of length 6 created, as that is maximum LoadSet size (need
            //public variable with that constant there for it to refer to?)
            String[] advSettings = new String[6];

            if(LIST.equals("default"))
            {
                //just get the first item (somehow it knows first is the
                //FTP list command)
                advSettings = LoadSet.loadSet(Settings.adv_settings);

                //*** IF FILE NOT FOUND, CREATE IT AND SET IT TO LIST_DEFAULT
                if(advSettings == null)
                {
                    LIST = LIST_DEFAULT;

                    SaveSet s = new SaveSet(Settings.adv_settings, LIST);
                }
                else
                {
                    LIST = advSettings[0];

                    if(LIST == null)
                    {
                        LIST = LIST_DEFAULT;
                    }
                }
            }

            //***
            fireDirectoryUpdate(this);
            fireConnectionInitialized(this);
        }
        else
        {
            fireConnectionFailed(this, new Integer(status).toString());
        }

        return status;
    }

    /**
    * Sort the filesizes an return an array.
    *
    * The Array should be in sync with the other sort*-Methods
    *
    * @param file The file containing the raw server listing, usually Settings.ls_out
    * @return An String-array of sizes containing the size or -1 if failed or 0 for directories
    */
    public String[] sortSize(String file)
    {
        BufferedReader in = null;
        PrintStream out = null;
        int length = 0;

        if(TESTMODE)
        {
            file = "/home/cdemon/sampleos2";
        }

        try
        {
            in = new BufferedReader(new FileReader(file));
            out = new PrintStream(new FileOutputStream(Settings.sortsize_out));

            while(true)
            {
                String tmp = in.readLine();

                if(tmp == null)
                {
		    Log.debug("end size");
                    break;
                }

                length++;

                // ------------- VMS override -------------------
                if(getOsType().indexOf("VMS") >= 0)
                {
                    if(tmp.indexOf(";") < 0)
                    {
                        length--;

                        continue;
                    }

                    out.println("-1");

                    continue;
                }
                // ------------------------------------------------
                else if(getOsType().indexOf("WINDOW") >= 0)
                {
                    StringTokenizer to = new StringTokenizer(tmp, " ", false);

                    if(to.countTokens() >= 4)
                    {
                        to.nextToken();
                        to.nextToken();

                        String size = to.nextToken();

                        if(size.equals("<DIR>"))
                        {
                            out.println("0");
                        }
                        else
                        {
                            try
                            {
                                Long.parseLong(size);
                                out.println(size);
                            }
                            catch(Exception ex)
                            {
                                out.println("-1");
                                Log.out("WARNING: filesize can not be determined - value is " +
                                        size);
                            }
                        }
                    }
                }
                // ------------------------------------------------
                else if(getOsType().indexOf("OS/2") >= 0)
                {
                    StringTokenizer to = new StringTokenizer(tmp, " ", false);
                    tmp = giveSize(to, 0);
                    Log.out("OS/2 parser (size): " + tmp);
                    out.println(tmp);
                }
                else
                {
                    //Log.out("\n\nparser\n\n");
                    StringTokenizer to = new StringTokenizer(tmp, " ", false);

                    if(to.countTokens() >= 8) // unix
                    {
                        tmp = giveSize(to, 4);
                        out.println(tmp);
			//Log.out(tmp);
                    }
		    else if(to.countTokens() == 7) // unix, too
		    {
		    	Log.out("WARNING: 7 token backup size parser activated!");
                        tmp = giveSize(to, 4);
                        out.println(tmp);		    	
		    }
                    else
                    {
		    	Log.debug("cannot parse line: " + tmp);
                        length--;
                    }
                }
            }
        }
        catch(Exception ex)
        {
            Log.debug(ex.toString() + " @FtpConnection::sortSize#1");
        }

        try
        {
            in = new BufferedReader(new FileReader(Settings.sortsize_out));

            String[] files = new String[length];

            for(int i = 0; i < length; i++)
            {
                files[i] = in.readLine();

                //System.out.println(files[i]);
                //Log.debug(files[i]);
            }

            return files;
        }
        catch(Exception ex)
        {
            Log.debug(ex.toString() + " @FtpConnection::sortSize#2");
        }

        return new String[0];
    }

    /**
    * Sort the permissions an return an array.
    *
    * The Array should be in sync with the other sort*-Methods
    *
    * @param file The file containing the raw server listing, usually Settings.ls_out
    * @return An int-array of sizes containing W, R or DENIED for each file
    */
    public int[] getPermissions(String file)
    {
        BufferedReader in = null;
        PrintStream out = null;
        int length = 0;

        if(TESTMODE)
        {
            file = "/home/cdemon/sampleos2";
        }

        try
        {
            in = new BufferedReader(new FileReader(file));
            out = new PrintStream(new FileOutputStream(Settings.permissions_out));

            while(true)
            {
                String tmp = in.readLine();

                if(tmp == null)
                {
                    break;
                }

                // ------------- VMS override -------------------
                if(getOsType().indexOf("VMS") >= 0)
                {
                    if(tmp.indexOf(";") < 0)
                    {
                        continue;
                    }

                    out.println("r");
                    length++;

                    continue;
                }

                // ------------------------------------------------
                length++;

                StringTokenizer to = new StringTokenizer(tmp.trim(), " ", false);

                if(!(to.countTokens() > 3) ||
                       (tmp.startsWith("/") && (tmp.indexOf("denied") > 0)))
                {
                    length--;

                    continue;
                }

                tmp = to.nextToken();

                if(tmp.length() != 10)
                {
                    //System.out.println(tmp + " - e");
                    return null; // exotic bug, hardlinks are not found or something ("/bin/ls: dir: no such file or directy" in ls output) - we have no permissions then
                }