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

    private int getActivePort()
    {
        return (getPortA() * 256) + getPortB();
    }

    /** parse a symlink */
    private String parseSymlink(String file)
    {
        if(file.indexOf("->") >= 0)
        {
            //System.out.print(file+" :-> symlink converted to:");
            file = file.substring(0, file.indexOf("->")).trim();
            file = file + "###";

            //System.out.println(file);
        }

        return file;
    }

    /** parse a symlink and cut the back */
    private String parseSymlinkBack(String file)
    {
        if(file.indexOf("->") >= 0)
        {
            //System.out.print(file+" :-> symlink converted to:");
            file = file.substring(file.indexOf("->") + 2).trim();

            //System.out.println(file);
        }

        return file;
    }

    /** test for symlink */
    private boolean isSymlink(String file)
    {
        if(file.indexOf("->") >= 0)
        {
            return true;
        }

        return false;
    }

    /** Download a file or directory.
    * Uses multithreading if enabled and does not block.
    *
    * @param file The file to download
    * @return An int-statuscode, see constants defined in this class for details
    */
    public int handleDownload(String file)
    {
        if(Settings.getEnableMultiThreading())
        {
            Log.out("spawning new thread for this download.");

            FtpTransfer t = new FtpTransfer(host, port, getLocalPath(),
                                            getCachedPWD(), file, username,
                                            password, Transfer.DOWNLOAD,
                                            handler, listeners);
            lastTransfer = t;

            return NEW_TRANSFER_SPAWNED;
        }
        else
        {
            Log.out("multithreading is completely disabled.");

            return download(file);
        }
    }

    /**
    * Download a file or directory, block until finished.
    *
    * @param file The file to download
    * @return An int returncode
    */
    public int download(String file)
    {
        Log.out("ftp download started:" + this);

        int stat;

        if(file.endsWith("/"))
        {
            shortProgress = true;
            fileCount = 0;
            baseFile = file;
            dataType = DataConnection.GETDIR;

            stat = downloadDir(file);

            pause(500);
            fireActionFinished(this);
            fireProgressUpdate(baseFile,
                               DataConnection.DFINISHED + ":" + fileCount, -1);
            shortProgress = false;
        }
        else
        {
            dataType = DataConnection.GET;

            stat = rawDownload(file);
	    
        try
        {
            Thread.sleep(100);
        }
        catch(Exception ex)
        {
        }

            fireActionFinished(this);
        }

        try
        {
            Thread.sleep(400);
        }
        catch(Exception ex)
        {
        }

        return stat;
    }

    /**
    * Get download InputStream.
    *
    * @param file The file to download
    * @return An InputStream
    */
    public InputStream getDownloadInputStream(String file)
    {
        Log.out("ftp stream download started:" + this);
        file = parse(file);

        try
        {
            int p = 0;
            dataType = DataConnection.GET;
            file = StringUtils.getFile(file);

            String path = getLocalPath() + file;

            BufferedReader in = jcon.getReader();

            modeStream();
            p = negotiatePort();

            dcon = new DataConnection(this, p, host, path, dataType, false, true);

            while(!dcon.isThere())
            {
                pause(10);
            }

            jcon.send(RETR + " " + file);

            return dcon.getInputStream();
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
            Log.debug(ex.toString() +
                      " @FtpConnection::getDownloadInputStream");

            return null;
        }
    }

    private int rawDownload(String file)
    {
        file = parse(file);

        //String path = file;
        try
        {
            int p = 0;

            //if(isRelative(file)) path = getLocalPath() + file;
            file = StringUtils.getFile(file);

            String path = getLocalPath() + file;

            //System.out.println(file + " : " + path);
            //BufferedReader in = jcon.getReader();
            modeStream();

            //binary();
            p = negotiatePort();

            File f = new File(path);

            //System.out.println("path: "+path);
            boolean resume = false;

            if(f.exists() && Settings.enableResuming)
            {
                jcon.send(REST + " " + f.length());

                if(getLine(PROCEED) != null)
                {
                    resume = true;
                }
            }

            dcon = new DataConnection(this, p, host, path, dataType, resume); //, new Updater());

            while(!dcon.isThere())
            {
                pause(10);
            }

            jcon.send(RETR + " " + file);

            String line = getLine(POSITIVE);
            Log.debug(line);

            // file has been created even if not downloaded, delete it
            if(line.startsWith(NEGATIVE))
            {
                File f2 = new File(path);

                if(f2.exists() && (f2.length() == 0))
                {
                    f2.delete();
                }

                return PERMISSION_DENIED;
            }
            else if(!line.startsWith(POSITIVE) && !line.startsWith(PROCEED))
            {
                return TRANSFER_FAILED;
            }

            // we need to block since some ftp-servers do not want the
            // refresh command that dirpanel sends otherwise
            while(!dcon.finished)
            {
                pause(10);
            }
        }
        catch(Exception ex)
        {
            ex.printStackTrace();
            Log.debug(ex.toString() + " @FtpConnection::download");

            return TRANSFER_FAILED;
        }

        return TRANSFER_SUCCESSFUL;
    }

    private int downloadDir(String dir)
    {
        if(!dir.endsWith("/"))
        {
            dir = dir + "/";
        }

        if(StringUtils.isRelative(dir))
        {
            dir = getCachedPWD() + dir;
        }

        String path = getLocalPath() + StringUtils.getDir(dir);

        //System.out.println("path: "+path);
        String pwd = getCachedPWD() + StringUtils.getDir(dir);

        String oldDir = getLocalPath();
        String oldPwd = getCachedPWD();

        File f = new File(path);

        if(!f.exists())
        {
            if(!f.mkdir())
            {
                Log.debug("Can't create directory: " + dir);
            }
            else
            {
                Log.debug("Created directory...");
            }
        }

        setLocalPath(path);

        if(!chdirNoRefresh(pwd))
        {
            return CHDIR_FAILED;
        }

        try
        {
            list(Settings.ls_out);
        }
        catch(IOException ex)
        {
            return PERMISSION_DENIED;
        }

        String[] tmp = sortLs(Settings.ls_out);

        setLocalPath(path);

        for(int i = 0; i < tmp.length; i++)
        {
            if(tmp[i].endsWith("/"))
            {
                if(tmp[i].trim().equals("../") || tmp[i].trim().equals("./"))
                {
                    Log.debug("Skipping " + tmp[i].trim());
                }
                else
                {
                    if(!work)
                    {
                        return TRANSFER_STOPPED;
                    }

                    if(downloadDir(tmp[i]) < 0)
                    {
                        ; // return TRANSFER_FAILED;
                    }
                }
            }
            else
            {
                //System.out.println( "file: " + getLocalPath() + tmp[i] + "\n\n");
                if(!work)
                {
                    return TRANSFER_STOPPED;
                }

                fileCount++;

                if(rawDownload(getLocalPath() + tmp[i]) < 0)
                {
                    ; // return TRANSFER_FAILED;
                }
            }
        }

        chdirNoRefresh(oldPwd);
        setLocalPath(oldDir);

        return TRANSFER_SUCCESSFUL;
    }

    /** Upload a file or directory.
    * Uses multithreading if enabled and does not block.
    *
    * @param file The file to upload
    * @return An int-statuscode, NEW_TRANSFER_SPAWNED,TRANSFER_FAILED or TRANSFER_SUCCESSFUL
    */
    public int handleUpload(String file)
    {
        return handleUpload(file, null);
    }

    /** Upload a file or directory.
    * Uses multithreading if enabled and does not block.
    *
    * @param file The file to upload
    * @param realName The file to rename the uploaded file to
    * @return An int-statuscode, NEW_TRANSFER_SPAWNED,TRANSFER_FAILED or TRANSFER_SUCCESSFUL
    */
    public int handleUpload(String file, String realName)
    {
        if(Settings.getEnableMultiThreading() &&
               (!Settings.getNoUploadMultiThreading()))
        {
            Log.out("spawning new thread for this upload.");

            FtpTransfer t;

            if(realName != null)
            {
                t = new FtpTransfer(host, port, getLocalPath(), getCachedPWD(),
                                    file, username, password, Transfer.UPLOAD,
                                    handler, listeners, realName);
            }
            else
            {
                t = new FtpTransfer(host, port, getLocalPath(), getCachedPWD(),
                                    file, username, password, Transfer.UPLOAD,
                                    handler, listeners);
            }

            lastTransfer = t;

            return NEW_TRANSFER_SPAWNED;
        }
        else
        {
            if(Settings.getNoUploadMultiThreading())
            {
                Log.out("upload multithreading is disabled.");
            }
            else
            {
                Log.out("multithreading is completely disabled.");
            }

            if(realName == null)
            {
                return upload(file);
            }
            else
            {
                return upload(file, realName);
            }
        }
    }

    /**
    * Upload a file or directory, block until finished.
    *
    * @param file The file to upload
    * @return An int returncode
    */
    public int upload(String file)
    {
        return upload(file, file);
    }

    /**
    * Upload and a file or directory under a given name, block until finished.
    * Note that setting realName does not affect directory transfers
    *
    * @param file The file to upload
    * @param realName The file to rename the uploaded file to
    * @return An int responsecode
    */
    public int upload(String file, String realName)
    {
        return upload(file, realName, null);
    }

    /**
    * Upload from an InputStream, block until finished.
    *
    * @param file The file to upload
    * @param in InputStream to read from
    * @return An int responsecode
    */
    public int upload(String file, InputStream in)
    {
        return upload(file, file, in);
    }

    /**
    * Upload and a file or directory under a given name, block until finished.
    * Note that setting realName does not affect directory transfers
    *
    * @param file The file to upload
    * @param realName The file to rename the uploaded file to
    * @param in InputStream to read from
    * @return An int responsecode
    */
    public int upload(String file, String realName, InputStream in)
    {
        hasUploaded = true;
        Log.out("ftp upload started: " + this);

        int stat;

        if((in == null) && new File(file).isDirectory())
        {
            shortProgress = true;
            fileCount = 0;
            baseFile = file;
            dataType = DataConnection.PUTDIR;
            isDirUpload = true;

            stat = uploadDir(file);

            shortProgress = false;

            //System.out.println(fileCount + ":" + baseFile);
            fireProgressUpdate(baseFile,
                               DataConnection.DFINISHED + ":" + fileCount, -1);

            fireActionFinished(this);
            fireDirectoryUpdate(this);
        }
        else
        {
            dataType = DataConnection.PUT;
            stat = rawUpload(file, realName, in);
	    
	try
        {
            Thread.sleep(100);
        }
        catch(Exception ex)
        {
        }
	
            fireActionFinished(this);
            fireDirectoryUpdate(this);
        }

        try
        {
            Thread.sleep(500);
        }
        catch(Exception ex)
        {
        }

        return stat;
    }