com.compomics.util.io
Class FTP

java.lang.Object
  extended by com.compomics.util.io.FTP

public class FTP
extends Object

This class was modified from a source found on the net (java.sun.com, search in developer section on 'FtpProtocolException PORT').

Author:
Lennart Martens + someone on the net...

Field Summary
 String command
          The last command issued.
protected  Socket controlSocket
          Socket for communicating commands with the server.
static int FILE_GET
          Pre-defined state.
static int FILE_PUT
          Pre-defined state.
static int FTP_PORT
          FTP port to use for connection.
protected  String m_strDestination
           
protected  String m_strSource
           
 InputStream serverInput
          Buffered stream for reading replies from server.
 PrintWriter serverOutput
          Stream for printing to the server.
protected  Vector serverResponse
          Array of strings (usually 1 entry) for the last reply from the server.
protected  String strFileNameAndPath
          String to hold the file we are up/downloading
 String welcomeMsg
          Welcome message from the server, if any.
 
Constructor Summary
FTP(String host)
          Constructor for an FTP client connected to host host.
FTP(String host, int port)
          Constructor for an FTP client connected to host host and port port.
 
Method Summary
 void abort()
          Send Abort command.
 BufferedWriter appendAscii(String filename)
          APPEND (with create) to a file to the FTP server in Ascii mode.
 BufferedOutputStream appendBinary(String filename)
          APPEND (with create) to a file to the FTP server in Binary mode.
 void ascii()
          Set transfer type to 'A' (ascii transfer).
 void binary()
          Set transfer type to 'I' (binary transfer).
 void cd(String remoteDirectory)
          CD to a specific directory on a remote FTP server.
 void cdup()
          Go up one directory on remote system.
 void closeServer()
          Issue the QUIT command to the FTP server and close the connection.
 void cwd(String remoteDirectory)
          Change working directory to a specific directory on a remote FTP server.
 void delete(String aFile)
          Delete the specified file from the ftp server file system.
 BufferedReader dir()
          Folder-list files on a remote FTP server.
 BufferedReader getAscii(String filename)
          GET a file from the FTP server in Ascii mode.
 BufferedInputStream getBinary(String filename)
          GET a file from the FTP server in Binary mode.
 String getDestinationFile()
          This method reports on the destinationfile currently used in transfer.
 String getResponseString()
          Returns all server response strings.
 String getResponseStringNoReset()
          This method allows the caller to read the response strings from the server, without resetting the internal buffer (and thus not clearing the messages read by this messages).
 String getSourceFile()
          This method reports on the sourcefile currently used in transfer.
protected  int issueCommand(String cmd)
          This method allows the caller to issue a command to the server.
protected  void issueCommandCheck(String cmd)
          This method will issue the specified command and throw an exception whenever the reply is not equal to success!
 BufferedReader list()
          LIST files on a remote FTP server.
 void login(String user)
          Login user to a host with username user and no password such as HP server which uses the form "/,user.
 void login(String user, String password)
          Login user to a host with username user and password password.
 BufferedReader ls()
          Folder-list files on a remote FTP server.
 void mkdir(String aDir)
          Create a directory on the remote system
 BufferedReader nlist()
          NLIST files on a remote FTP server
protected  Socket openDataConnection(String cmd)
          This method will set up the networking for client-server data transfer and it will send the specified command to the server.
 void openServer(String host)
          open a FTP connection to host host.
 void openServer(String host, int port)
          Open an FTP connection to host host on port port.
 BufferedWriter putAscii(String filename)
          PUT a file on the FTP server in Ascii mode.
 BufferedOutputStream putBinary(String filename)
          PUT a file to the FTP server in Binary mode
 void pwd()
          Get the name of the present working directory on the ftp server file system.
protected  int readReply()
          This method attempts to read a reply from the FTP server.
 int readServerResponse()
          This method allows the caller to capture the serverresponse.
 void rename(String oldFile, String newFile)
          Rename a file on the remote server.
 void rmdir(String aDir)
          Delete the specified directory from the ftp server file system.
 void sendServer(String cmd)
          Sends command cmd to the server.
 boolean serverIsOpen()
          Return server connection status
 void setDestinationFile(String strDestinationFile)
          This method allows the specification of the destinationfile.
 void SetFileMode(int nMode)
          This method sets the file transfer mode.
 void setFilename(String strFile)
          This method sets the name of the file to up- or download.
 void setPassive(boolean mode)
          Set Passive mode Trasfers.
 void setSourceFile(String strSourceFile)
          This method allows to set the source for the file that is to be transferred.
 void site(String params)
          Site Command
 void syst()
          Retrieve the system type from the remote server.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Field Detail

FTP_PORT

public static final int FTP_PORT
FTP port to use for connection.

See Also:
Constant Field Values

FILE_GET

public static int FILE_GET
Pre-defined state.


FILE_PUT

public static int FILE_PUT
Pre-defined state.


command

public String command
The last command issued.


welcomeMsg

public String welcomeMsg
Welcome message from the server, if any.


serverResponse

protected Vector serverResponse
Array of strings (usually 1 entry) for the last reply from the server.


controlSocket

protected Socket controlSocket
Socket for communicating commands with the server.


serverOutput

public PrintWriter serverOutput
Stream for printing to the server.


serverInput

public InputStream serverInput
Buffered stream for reading replies from server.


strFileNameAndPath

protected String strFileNameAndPath
String to hold the file we are up/downloading


m_strSource

protected String m_strSource

m_strDestination

protected String m_strDestination
Constructor Detail

FTP

public FTP(String host)
    throws IOException
Constructor for an FTP client connected to host host. Note that this constructor automatically makes the connection.

Parameters:
host - String with the hostname (or IP) to connect to.
Throws:
IOException - whenever a connection could not be made.

FTP

public FTP(String host,
           int port)
    throws IOException
Constructor for an FTP client connected to host host and port port. Note that this constructor automatically makes the connection.

Parameters:
host - String with the hostname (or IP) to connect to.
port - int with the portnumber for the host FTP server.
Throws:
IOException - whenever a connection could not be made.
Method Detail

setFilename

public void setFilename(String strFile)
This method sets the name of the file to up- or download.

Parameters:
strFile - String with the filename.

setSourceFile

public void setSourceFile(String strSourceFile)
This method allows to set the source for the file that is to be transferred.

Parameters:
strSourceFile - String with the sourec for the file to be transferred.

setDestinationFile

public void setDestinationFile(String strDestinationFile)
This method allows the specification of the destinationfile.

Parameters:
strDestinationFile - String with the destination file.

getSourceFile

public String getSourceFile()
This method reports on the sourcefile currently used in transfer.

Returns:
String with the source file.

getDestinationFile

public String getDestinationFile()
This method reports on the destinationfile currently used in transfer.

Returns:
String with the destination file.

serverIsOpen

public boolean serverIsOpen()
Return server connection status

Returns:
boolean 'true' when connected, 'false' otherwise.

setPassive

public void setPassive(boolean mode)
Set Passive mode Trasfers. This is particularly useful when attempting to FTP via passive mode.

Parameters:
mode - boolean to indicate whether passive mode should be used.

readServerResponse

public int readServerResponse()
                       throws IOException
This method allows the caller to capture the serverresponse.

Returns:
int with the server's response.
Throws:
IOException

sendServer

public void sendServer(String cmd)
Sends command cmd to the server.

Parameters:
cmd - String with the command to send.

getResponseString

public String getResponseString()
Returns all server response strings. It also clears the server-response buffer!

Returns:
String with all the server response strings.

getResponseStringNoReset

public String getResponseStringNoReset()
This method allows the caller to read the response strings from the server, without resetting the internal buffer (and thus not clearing the messages read by this messages).

Returns:
String with the server responses.

closeServer

public void closeServer()
                 throws IOException
Issue the QUIT command to the FTP server and close the connection.

Throws:
IOException

issueCommand

protected int issueCommand(String cmd)
                    throws IOException
This method allows the caller to issue a command to the server.

Parameters:
cmd - String with the command to issue.
Returns:
int with the server reply status.
Throws:
IOException - when the connection with the server failed.

issueCommandCheck

protected void issueCommandCheck(String cmd)
                          throws IOException
This method will issue the specified command and throw an exception whenever the reply is not equal to success! It basically converts an FTP error code into an FtpProtocolException.

Parameters:
cmd - String with the command to issue (and verify the response for)
Throws:
IOException - when the connection failed OR FtpProtocolException when the command was not understood by the server.

readReply

protected int readReply()
                 throws IOException
This method attempts to read a reply from the FTP server.

Returns:
int with the reply from the server.
Throws:
IOException - whenever the reply could not be read.

openDataConnection

protected Socket openDataConnection(String cmd)
                             throws IOException
This method will set up the networking for client-server data transfer and it will send the specified command to the server. This is typically used only for true file transfer.

Parameters:
cmd - String with the command to issue.
Returns:
Socket with the data connection socket.
Throws:
IOException - whenever communications could not be established.

openServer

public void openServer(String host)
                throws IOException,
                       UnknownHostException
open a FTP connection to host host.

Parameters:
host - String with the hostname (or IP) to connect to.
Throws:
IOException - whenever connection could not be established.
UnknownHostException - when the hostname cannot be resolved.

openServer

public void openServer(String host,
                       int port)
                throws IOException,
                       UnknownHostException
Open an FTP connection to host host on port port. This method can be used whenever the default FTP port (21) does not apply.

Parameters:
host - String with the hostname (or IP) of the FTP server.
port - int with the portnumber the FTP server is listening on.
Throws:
IOException - whenever connection could not be established.
UnknownHostException - when the hostname cannot be resolved.

login

public void login(String user,
                  String password)
           throws IOException
Login user to a host with username user and password password.

Parameters:
user - String with the username to use.
password - String with the password to use (passwords are sent in plain text in FTP!)
Throws:
IOException

login

public void login(String user)
           throws IOException
Login user to a host with username user and no password such as HP server which uses the form "/,user..

Parameters:
user - String with the username (and possibly coded information such as password).
Throws:
IOException

getAscii

public BufferedReader getAscii(String filename)
                        throws IOException
GET a file from the FTP server in Ascii mode.

Parameters:
filename - String with the filename to get from the server.
Returns:
BufferedReader to the file on the server.
Throws:
IOException - whenever the file could not be read.

getBinary

public BufferedInputStream getBinary(String filename)
                              throws IOException
GET a file from the FTP server in Binary mode.

Parameters:
filename - String with the filename to get from the server.
Returns:
BufferedInputStream to the file on the server.
Throws:
IOException - whenever the file could not be read.

putAscii

public BufferedWriter putAscii(String filename)
                        throws IOException
PUT a file on the FTP server in Ascii mode.

Parameters:
filename - String with the filename to put on the server.
Returns:
BufferedWriter writer for completing the file on the server.
Throws:
IOException - whenever the file could not be sent.

putBinary

public BufferedOutputStream putBinary(String filename)
                               throws IOException
PUT a file to the FTP server in Binary mode

Parameters:
filename - String with the filename to put on the server.
Returns:
BufferedOutputStream outputstream for completing the file on the server.
Throws:
IOException - whenever the file could not be sent.

appendAscii

public BufferedWriter appendAscii(String filename)
                           throws IOException
APPEND (with create) to a file to the FTP server in Ascii mode.

Parameters:
filename - String with the name of the file to append to.
Returns:
BufferedWriter with the stream for appending to.
Throws:
IOException - whenever the writer fails.

appendBinary

public BufferedOutputStream appendBinary(String filename)
                                  throws IOException
APPEND (with create) to a file to the FTP server in Binary mode.

Parameters:
filename - String with the name of the file to append to.
Returns:
BufferedOutputStream with the stream for appending to.
Throws:
IOException - whenever the writer fails.

nlist

public BufferedReader nlist()
                     throws IOException
NLIST files on a remote FTP server

Returns:
BufferedReader to read the listing from.
Throws:
IOException - whenever the listing failed.

list

public BufferedReader list()
                    throws IOException
LIST files on a remote FTP server.

Returns:
BufferedReader to read the listing from.
Throws:
IOException - whenever the listing failed.

ls

public BufferedReader ls()
                  throws IOException
Folder-list files on a remote FTP server.

Returns:
BufferedReader to read the listing from.
Throws:
IOException - whenever the listing failed.

dir

public BufferedReader dir()
                   throws IOException
Folder-list files on a remote FTP server.

Returns:
BufferedReader to read the listing from.
Throws:
IOException - whenever the listing failed.

cd

public void cd(String remoteDirectory)
        throws IOException
CD to a specific directory on a remote FTP server.

Parameters:
remoteDirectory - String with the directory to CD to.
Throws:
IOException - whenever the CD failed.

cwd

public void cwd(String remoteDirectory)
         throws IOException
Change working directory to a specific directory on a remote FTP server.

Parameters:
remoteDirectory - String with the directory to CWD to.
Throws:
IOException - whenever the CWD failed.

rename

public void rename(String oldFile,
                   String newFile)
            throws IOException
Rename a file on the remote server.

Parameters:
oldFile - String with the original filename for the file to rename.
newFile - String with the filename to rename the file to.
Throws:
IOException - when the renaming failed.

site

public void site(String params)
          throws IOException
Site Command

Parameters:
params - String with the parameters for the SITE command.
Throws:
IOException - when the SITE command failed.

binary

public void binary()
            throws IOException
Set transfer type to 'I' (binary transfer).

Throws:
IOException - when the binary mode could not be set up.

ascii

public void ascii()
           throws IOException
Set transfer type to 'A' (ascii transfer).

Throws:
IOException - when the ASCII mode could not be set up.

abort

public void abort()
           throws IOException
Send Abort command.

Throws:
IOException - when the cancellation could not be executed.

cdup

public void cdup()
          throws IOException
Go up one directory on remote system.

Throws:
IOException - when the CDUP failed.

mkdir

public void mkdir(String aDir)
           throws IOException
Create a directory on the remote system

Parameters:
aDir - String with the name for the directory to be created.
Throws:
IOException - when the directory could not be created.

rmdir

public void rmdir(String aDir)
           throws IOException
Delete the specified directory from the ftp server file system.

Parameters:
aDir - String with the directory to delete.
Throws:
IOException - when the deletion did not succeed.

delete

public void delete(String aFile)
            throws IOException
Delete the specified file from the ftp server file system.

Parameters:
aFile - String with the filename for the file to delete.
Throws:
IOException - when the deletion did not succeed.

pwd

public void pwd()
         throws IOException
Get the name of the present working directory on the ftp server file system.

Throws:
IOException - whenever the server did not report on the pwd.

syst

public void syst()
          throws IOException
Retrieve the system type from the remote server.

Throws:
IOException - whenever the system type could not be determined.

SetFileMode

public void SetFileMode(int nMode)
This method sets the file transfer mode.

Parameters:
nMode - int with the mode (either FILE_GET for retrieval, or any other int for sending a file).


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