* boolean error = false;
* try {
* int reply;
* ftp.connect("ftp.foobar.com");
* System.out.println("Connected to " + server + ".");
* System.out.print(ftp.getReplyString());
*
* // After connection attempt, you should check the reply code to verify
* // success.
* reply = ftp.getReplyCode();
*
* if(!FTPReply.isPositiveCompletion(reply)) {
* ftp.disconnect();
* System.err.println("FTP server refused connection.");
* System.exit(1);
* }
* ... // transfer files
* ftp.logout();
* } catch(IOException e) {
* error = true;
* e.printStackTrace();
* } finally {
* if(ftp.isConnected()) {
* try {
* ftp.disconnect();
* } catch(IOException ioe) {
* // do nothing
* }
* }
* System.exit(error ? 1 : 0);
* }
*
* * Immediately after connecting is the only real time you need to check the * reply code (because connect is of type void). The convention for all the * FTP command methods in FTPClient is such that they either return a * boolean value or some other value. * The boolean methods return true on a successful completion reply from * the FTP server and false on a reply resulting in an error condition or * failure. The methods returning a value other than boolean return a value * containing the higher level data produced by the FTP command, or null if a * reply resulted in an error condition or failure. If you want to access * the exact FTP reply code causing a success or failure, you must call * {@link org.apache.commons.net.ftp.FTP#getReplyCode getReplyCode } after * a success or failure. *
* The default settings for FTPClient are for it to use
* FTP.ASCII_FILE_TYPE ,
* FTP.NON_PRINT_TEXT_FORMAT ,
* FTP.STREAM_TRANSFER_MODE , and
* FTP.FILE_STRUCTURE . The only file types directly supported
* are FTP.ASCII_FILE_TYPE and
* FTP.BINARY_FILE_TYPE . Because there are at least 4
* different EBCDIC encodings, we have opted not to provide direct support
* for EBCDIC. To transfer EBCDIC and other unsupported file types you
* must create your own filter InputStreams and OutputStreams and wrap
* them around the streams returned or required by the FTPClient methods.
* FTPClient uses the {@link ToNetASCIIOutputStream NetASCII}
* filter streams to provide transparent handling of ASCII files. We will
* consider incorporating EBCDIC support if there is enough demand.
*
* FTP.NON_PRINT_TEXT_FORMAT ,
* FTP.STREAM_TRANSFER_MODE , and
* FTP.FILE_STRUCTURE are the only supported formats,
* transfer modes, and file structures.
*
* Because the handling of sockets on different platforms can differ * significantly, the FTPClient automatically issues a new PORT command * prior to every transfer requiring that the server connect to the client's * data port. This ensures identical problem-free behavior on Windows, Unix, * and Macintosh platforms. Additionally, it relieves programmers from * having to issue the PORT command themselves and dealing with platform * dependent issues. *
* Additionally, for security purposes, all data connections to the * client are verified to ensure that they originated from the intended * party (host and port). If a data connection is initiated by an unexpected * party, the command will close the socket and throw an IOException. You * may disable this behavior with * {@link #setRemoteVerificationEnabled setRemoteVerificationEnabled()}. *
* You should keep in mind that the FTP server may choose to prematurely
* close a connection if the client has been idle for longer than a
* given time period (usually 900 seconds). The FTPClient class will detect a
* premature FTP server connection closing when it receives a
* {@link org.apache.commons.net.ftp.FTPReply#SERVICE_NOT_AVAILABLE FTPReply.SERVICE_NOT_AVAILABLE }
* response to a command.
* When that occurs, the FTP class method encountering that reply will throw
* an {@link org.apache.commons.net.ftp.FTPConnectionClosedException}
* .
* FTPConnectionClosedException
* is a subclass of IOException and therefore need not be
* caught separately, but if you are going to catch it separately, its
* catch block must appear before the more general IOException
* catch block. When you encounter an
* {@link org.apache.commons.net.ftp.FTPConnectionClosedException}
* , you must disconnect the connection with
* {@link #disconnect disconnect() } to properly clean up the
* system resources used by FTPClient. Before disconnecting, you may check the
* last reply code and text with
* {@link org.apache.commons.net.ftp.FTP#getReplyCode getReplyCode },
* {@link org.apache.commons.net.ftp.FTP#getReplyString getReplyString },
* and
* {@link org.apache.commons.net.ftp.FTP#getReplyStrings getReplyStrings}.
* You may avoid server disconnections while the client is idle by
* periodicaly sending NOOP commands to the server.
*
* Rather than list it separately for each method, we mention here that * every method communicating with the server and throwing an IOException * can also throw a * {@link org.apache.commons.net.MalformedServerReplyException} * , which is a subclass * of IOException. A MalformedServerReplyException will be thrown when * the reply received from the server deviates enough from the protocol * specification that it cannot be interpreted in a useful manner despite * attempts to be as lenient as possible. *
* Listing API Examples * Both paged and unpaged examples of directory listings are available, * as follows: *
* Unpaged (whole list) access, using a parser accessible by auto-detect: *
* FTPClient f=FTPClient(); * f.connect(server); * f.login(username, password); * FTPFile[] files = listFiles(directory); **
* Paged access, using a parser not accessible by auto-detect. The class * defined in the first parameter of initateListParsing should be derived * from org.apache.commons.net.FTPFileEntryParser: *
* FTPClient f=FTPClient();
* f.connect(server);
* f.login(username, password);
* FTPListParseEngine engine =
* f.initiateListParsing("com.whatever.YourOwnParser", directory);
*
* while (engine.hasNext()) {
* FTPFile[] files = engine.getNext(25); // "page size" you want
* //do whatever you want with these files, display them, etc.
* //expensive FTPFile objects not created until needed.
* }
*
* * Paged access, using a parser accessible by auto-detect: *
* FTPClient f=FTPClient();
* f.connect(server);
* f.login(username, password);
* FTPListParseEngine engine = f.initiateListParsing(directory);
*
* while (engine.hasNext()) {
* FTPFile[] files = engine.getNext(25); // "page size" you want
* //do whatever you want with these files, display them, etc.
* //expensive FTPFile objects not created until needed.
* }
*
* * For examples of using FTPClient on servers whose directory listings *
MM d yyyy
* @author Daniel F. Savarese
* @author Rory Winston
* @see FTP
* @see FTPConnectionClosedException
* @see FTPFileEntryParser
* @see FTPFileEntryParserFactory
* @see DefaultFTPFileEntryParserFactory
* @see FTPClientConfig
*
* @see org.apache.commons.net.MalformedServerReplyException
**/
public class FTPClient extends FTP
implements Configurable
{
/***
* A constant indicating the FTP session is expecting all transfers
* to occur between the client (local) and server and that the server
* should connect to the client's data port to initiate a data transfer.
* This is the default data connection mode when and FTPClient instance
* is created.
***/
public static final int ACTIVE_LOCAL_DATA_CONNECTION_MODE = 0;
/***
* A constant indicating the FTP session is expecting all transfers
* to occur between two remote servers and that the server
* the client is connected to should connect to the other server's
* data port to initiate a data transfer.
***/
public static final int ACTIVE_REMOTE_DATA_CONNECTION_MODE = 1;
/***
* A constant indicating the FTP session is expecting all transfers
* to occur between the client (local) and server and that the server
* is in passive mode, requiring the client to connect to the
* server's data port to initiate a transfer.
***/
public static final int PASSIVE_LOCAL_DATA_CONNECTION_MODE = 2;
/***
* A constant indicating the FTP session is expecting all transfers
* to occur between two remote servers and that the server
* the client is connected to is in passive mode, requiring the other
* server to connect to the first server's data port to initiate a data
* transfer.
***/
public static final int PASSIVE_REMOTE_DATA_CONNECTION_MODE = 3;
private int __dataConnectionMode, __dataTimeout;
private int __passivePort;
private String __passiveHost;
private int __fileType, __fileFormat, __fileStructure, __fileTransferMode;
private boolean __remoteVerificationEnabled;
private long __restartOffset;
private FTPFileEntryParserFactory __parserFactory;
private int __bufferSize;
private boolean __listHiddenFiles;
// __systemName is a cached value that should not be referenced directly
// except when assigned in getSystemName and __initDefaults.
private String __systemName;
// __entryParser is a cached value that should not be referenced directly
// except when assigned in listFiles(String, String) and __initDefaults.
private FTPFileEntryParser __entryParser;
private FTPClientConfig __configuration;
/** Pattern for PASV mode responses */
private static String __parms = "\\d{1,3},\\d{1,3},\\d{1,3},\\d{1,3},\\d{1,3},\\d{1,3}";
private static java.util.regex.Pattern __parms_pat;
static {
__parms_pat = java.util.regex.Pattern.compile(__parms);
}
/***
* Default FTPClient constructor. Creates a new FTPClient instance
* with the data connection mode set to
* ACTIVE_LOCAL_DATA_CONNECTION_MODE , the file type
* set to FTP.ASCII_FILE_TYPE , the
* file format set to FTP.NON_PRINT_TEXT_FORMAT ,
* the file structure set to FTP.FILE_STRUCTURE , and
* the transfer mode set to FTP.STREAM_TRANSFER_MODE .
***/
public FTPClient()
{
__initDefaults();
__dataTimeout = -1;
__remoteVerificationEnabled = true;
__parserFactory = new DefaultFTPFileEntryParserFactory();
__configuration = null;
__listHiddenFiles = false;
}
private void __initDefaults()
{
__dataConnectionMode = ACTIVE_LOCAL_DATA_CONNECTION_MODE;
__passiveHost = null;
__passivePort = -1;
__fileType = FTP.ASCII_FILE_TYPE;
__fileStructure = FTP.FILE_STRUCTURE;
__fileFormat = FTP.NON_PRINT_TEXT_FORMAT;
__fileTransferMode = FTP.STREAM_TRANSFER_MODE;
__restartOffset = 0;
__systemName = null;
__entryParser = null;
__bufferSize = Util.DEFAULT_COPY_BUFFER_SIZE;
}
private String __parsePathname(String reply)
{
int begin, end;
begin = reply.indexOf('"') + 1;
end = reply.indexOf('"', begin);
return reply.substring(begin, end);
}
private void __parsePassiveModeReply(String reply)
throws MalformedServerReplyException
{
java.util.regex.Matcher m = __parms_pat.matcher(reply);
if (!m.find()) {
throw new MalformedServerReplyException(
"Could not parse passive host information.\nServer Reply: " + reply);
}
reply = m.group();
String parts[] = m.group().split(",");
__passiveHost = parts[0] + '.' + parts[1] + '.' + parts[2] + '.' + parts[3];
try
{
int oct1 = Integer.parseInt(parts[4]);
int oct2 = Integer.parseInt(parts[5]);
__passivePort = (oct1 << 8) | oct2;
}
catch (NumberFormatException e)
{
throw new MalformedServerReplyException(
"Could not parse passive host information.\nServer Reply: " + reply);
}
}
private boolean __storeFile(int command, String remote, InputStream local)
throws IOException
{
OutputStream output;
Socket socket;
if ((socket = _openDataConnection_(command, remote)) == null)
return false;
output = new BufferedOutputStream(socket.getOutputStream(),
getBufferSize()
);
if (__fileType == ASCII_FILE_TYPE)
output = new ToNetASCIIOutputStream(output);
// Treat everything else as binary for now
try
{
Util.copyStream(local, output, getBufferSize(),
CopyStreamEvent.UNKNOWN_STREAM_SIZE, null,
false);
}
catch (IOException e)
{
try
{
socket.close();
}
catch (IOException f)
{}
throw e;
}
output.close();
socket.close();
return completePendingCommand();
}
private OutputStream __storeFileStream(int command, String remote)
throws IOException
{
OutputStream output;
Socket socket;
if ((socket = _openDataConnection_(command, remote)) == null)
return null;
output = socket.getOutputStream();
if (__fileType == ASCII_FILE_TYPE) {
// We buffer ascii transfers because the buffering has to
// be interposed between ToNetASCIIOutputSream and the underlying
// socket output stream. We don't buffer binary transfers
// because we don't want to impose a buffering policy on the
// programmer if possible. Programmers can decide on their
// own if they want to wrap the SocketOutputStream we return
// for file types other than ASCII.
output = new BufferedOutputStream(output,
getBufferSize());
output = new ToNetASCIIOutputStream(output);
}
return new org.apache.commons.net.io.SocketOutputStream(socket, output);
}
/**
* Establishes a data connection with the FTP server, returning
* a Socket for the connection if successful. If a restart
* offset has been set with {@link #setRestartOffset(long)},
* a REST command is issued to the server with the offset as
* an argument before establishing the data connection. Active
* mode connections also cause a local PORT command to be issued.
*
* @param command The text representation of the FTP command to send. * @param arg The arguments to the FTP command. If this parameter is * set to null, then the command is sent with no argument. * @return A Socket corresponding to the established data connection. * Null is returned if an FTP protocol error is reported at * any point during the establishment and initialization of * the connection. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. */ protected Socket _openDataConnection_(int command, String arg) throws IOException { Socket socket; if (__dataConnectionMode != ACTIVE_LOCAL_DATA_CONNECTION_MODE && __dataConnectionMode != PASSIVE_LOCAL_DATA_CONNECTION_MODE) return null; if (__dataConnectionMode == ACTIVE_LOCAL_DATA_CONNECTION_MODE) { ServerSocket server; server = _serverSocketFactory_.createServerSocket(0, 1, getLocalAddress()); if (!FTPReply.isPositiveCompletion(port(getLocalAddress(), server.getLocalPort()))) { server.close(); return null; } if ((__restartOffset > 0) && !restart(__restartOffset)) { server.close(); return null; } if (!FTPReply.isPositivePreliminary(sendCommand(command, arg))) { server.close(); return null; } // For now, let's just use the data timeout value for waiting for // the data connection. It may be desirable to let this be a // separately configurable value. In any case, we really want // to allow preventing the accept from blocking indefinitely. if (__dataTimeout >= 0) server.setSoTimeout(__dataTimeout); try { socket = server.accept(); } finally { server.close(); } } else { // We must be in PASSIVE_LOCAL_DATA_CONNECTION_MODE if (pasv() != FTPReply.ENTERING_PASSIVE_MODE) return null; __parsePassiveModeReply(_replyLines.get(_replyLines.size() - 1)); socket = _socketFactory_.createSocket(__passiveHost, __passivePort); if ((__restartOffset > 0) && !restart(__restartOffset)) { socket.close(); return null; } if (!FTPReply.isPositivePreliminary(sendCommand(command, arg))) { socket.close(); return null; } } if (__remoteVerificationEnabled && !verifyRemote(socket)) { InetAddress host1, host2; host1 = socket.getInetAddress(); host2 = getRemoteAddress(); socket.close(); throw new IOException( "Host attempting data connection " + host1.getHostAddress() + " is not same as server " + host2.getHostAddress()); } if (__dataTimeout >= 0) socket.setSoTimeout(__dataTimeout); return socket; } @Override protected void _connectAction_() throws IOException { super._connectAction_(); __initDefaults(); } /*** * Sets the timeout in milliseconds to use when reading from the * data connection. This timeout will be set immediately after * opening the data connection. *
* @param timeout The default timeout in milliseconds that is used when * opening a data connection socket. ***/ public void setDataTimeout(int timeout) { __dataTimeout = timeout; } /** * set the factory used for parser creation to the supplied factory object. * * @param parserFactory * factory object used to create FTPFileEntryParsers * * @see org.apache.commons.net.ftp.parser.FTPFileEntryParserFactory * @see org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory */ public void setParserFactory(FTPFileEntryParserFactory parserFactory) { __parserFactory = parserFactory; } /*** * Closes the connection to the FTP server and restores * connection parameters to the default values. *
* @exception IOException If an error occurs while disconnecting. ***/ @Override public void disconnect() throws IOException { super.disconnect(); __initDefaults(); } /*** * Enable or disable verification that the remote host taking part * of a data connection is the same as the host to which the control * connection is attached. The default is for verification to be * enabled. You may set this value at any time, whether the * FTPClient is currently connected or not. *
* @param enable True to enable verification, false to disable verification. ***/ public void setRemoteVerificationEnabled(boolean enable) { __remoteVerificationEnabled = enable; } /*** * Return whether or not verification of the remote host participating * in data connections is enabled. The default behavior is for * verification to be enabled. *
* @return True if verification is enabled, false if not. ***/ public boolean isRemoteVerificationEnabled() { return __remoteVerificationEnabled; } /*** * Login to the FTP server using the provided username and password. *
* @param username The username to login under. * @param password The password to use. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean login(String username, String password) throws IOException { user(username); if (FTPReply.isPositiveCompletion(_replyCode)) return true; // If we get here, we either have an error code, or an intermmediate // reply requesting password. if (!FTPReply.isPositiveIntermediate(_replyCode)) return false; return FTPReply.isPositiveCompletion(pass(password)); } /*** * Login to the FTP server using the provided username, password, * and account. If no account is required by the server, only * the username and password, the account information is not used. *
* @param username The username to login under. * @param password The password to use. * @param account The account to use. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean login(String username, String password, String account) throws IOException { user(username); if (FTPReply.isPositiveCompletion(_replyCode)) return true; // If we get here, we either have an error code, or an intermmediate // reply requesting password. if (!FTPReply.isPositiveIntermediate(_replyCode)) return false; pass(password); if (FTPReply.isPositiveCompletion(_replyCode)) return true; if (!FTPReply.isPositiveIntermediate(_replyCode)) return false; return FTPReply.isPositiveCompletion(acct(account)); } /*** * Logout of the FTP server by sending the QUIT command. *
* @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean logout() throws IOException { return FTPReply.isPositiveCompletion(quit()); } /*** * Change the current working directory of the FTP session. *
* @param pathname The new current working directory. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean changeWorkingDirectory(String pathname) throws IOException { return FTPReply.isPositiveCompletion(cwd(pathname)); } /*** * Change to the parent directory of the current working directory. *
* @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean changeToParentDirectory() throws IOException { return FTPReply.isPositiveCompletion(cdup()); } /*** * Issue the FTP SMNT command. *
* @param pathname The pathname to mount. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean structureMount(String pathname) throws IOException { return FTPReply.isPositiveCompletion(smnt(pathname)); } /*** * Reinitialize the FTP session. Not all FTP servers support this * command, which issues the FTP REIN command. *
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
boolean reinitialize() throws IOException
{
rein();
if (FTPReply.isPositiveCompletion(_replyCode) ||
(FTPReply.isPositivePreliminary(_replyCode) &&
FTPReply.isPositiveCompletion(getReply())))
{
__initDefaults();
return true;
}
return false;
}
/***
* Set the current data connection mode to
* ACTIVE_LOCAL_DATA_CONNECTION_MODE. No communication
* with the FTP server is conducted, but this causes all future data
* transfers to require the FTP server to connect to the client's
* data port. Additionally, to accommodate differences between socket
* implementations on different platforms, this method causes the
* client to issue a PORT command before every data transfer.
***/
public void enterLocalActiveMode()
{
__dataConnectionMode = ACTIVE_LOCAL_DATA_CONNECTION_MODE;
__passiveHost = null;
__passivePort = -1;
}
/***
* Set the current data connection mode to
* PASSIVE_LOCAL_DATA_CONNECTION_MODE . Use this
* method only for data transfers between the client and server.
* This method causes a PASV command to be issued to the server
* before the opening of every data connection, telling the server to
* open a data port to which the client will connect to conduct
* data transfers. The FTPClient will stay in
* PASSIVE_LOCAL_DATA_CONNECTION_MODE until the
* mode is changed by calling some other method such as
* {@link #enterLocalActiveMode enterLocalActiveMode() }
***/
public void enterLocalPassiveMode()
{
__dataConnectionMode = PASSIVE_LOCAL_DATA_CONNECTION_MODE;
// These will be set when just before a data connection is opened
// in _openDataConnection_()
__passiveHost = null;
__passivePort = -1;
}
/***
* Set the current data connection mode to
* ACTIVE_REMOTE_DATA_CONNECTION . Use this method only
* for server to server data transfers. This method issues a PORT
* command to the server, indicating the other server and port to which
* it should connect for data transfers. You must call this method
* before EVERY server to server transfer attempt. The FTPClient will
* NOT automatically continue to issue PORT commands. You also
* must remember to call
* {@link #enterLocalActiveMode enterLocalActiveMode() } if you
* wish to return to the normal data connection mode.
*
* @param host The passive mode server accepting connections for data
* transfers.
* @param port The passive mode server's data port.
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean enterRemoteActiveMode(InetAddress host, int port)
throws IOException
{
if (FTPReply.isPositiveCompletion(port(host, port)))
{
__dataConnectionMode = ACTIVE_REMOTE_DATA_CONNECTION_MODE;
__passiveHost = null;
__passivePort = -1;
return true;
}
return false;
}
/***
* Set the current data connection mode to
* PASSIVE_REMOTE_DATA_CONNECTION_MODE . Use this
* method only for server to server data transfers.
* This method issues a PASV command to the server, telling it to
* open a data port to which the active server will connect to conduct
* data transfers. You must call this method
* before EVERY server to server transfer attempt. The FTPClient will
* NOT automatically continue to issue PASV commands. You also
* must remember to call
* {@link #enterLocalActiveMode enterLocalActiveMode() } if you
* wish to return to the normal data connection mode.
*
* @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean enterRemotePassiveMode() throws IOException { if (pasv() != FTPReply.ENTERING_PASSIVE_MODE) return false; __dataConnectionMode = PASSIVE_REMOTE_DATA_CONNECTION_MODE; __parsePassiveModeReply(_replyLines.get(0)); return true; } /*** * Returns the hostname or IP address (in the form of a string) returned * by the server when entering passive mode. If not in passive mode, * returns null. This method only returns a valid value AFTER a * data connection has been opened after a call to * {@link #enterLocalPassiveMode enterLocalPassiveMode()}. * This is because FTPClient sends a PASV command to the server only * just before opening a data connection, and not when you call * {@link #enterLocalPassiveMode enterLocalPassiveMode()}. *
* @return The passive host name if in passive mode, otherwise null. ***/ public String getPassiveHost() { return __passiveHost; } /*** * If in passive mode, returns the data port of the passive host. * This method only returns a valid value AFTER a * data connection has been opened after a call to * {@link #enterLocalPassiveMode enterLocalPassiveMode()}. * This is because FTPClient sends a PASV command to the server only * just before opening a data connection, and not when you call * {@link #enterLocalPassiveMode enterLocalPassiveMode()}. *
* @return The data port of the passive server. If not in passive
* mode, undefined.
***/
public int getPassivePort()
{
return __passivePort;
}
/***
* Returns the current data connection mode (one of the
* _DATA_CONNECTION_MODE constants.
*
* @return The current data connection mode (one of the
* _DATA_CONNECTION_MODE constants.
***/
public int getDataConnectionMode()
{
return __dataConnectionMode;
}
/***
* Sets the file type to be transferred. This should be one of
* FTP.ASCII_FILE_TYPE , FTP.BINARY_FILE_TYPE,
* etc. The file type only needs to be set when you want to change the
* type. After changing it, the new type stays in effect until you change
* it again. The default file type is FTP.ASCII_FILE_TYPE
* if this method is never called.
*
* @param fileType The _FILE_TYPE constant indcating the
* type of file.
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean setFileType(int fileType) throws IOException
{
if (FTPReply.isPositiveCompletion(type(fileType)))
{
__fileType = fileType;
__fileFormat = FTP.NON_PRINT_TEXT_FORMAT;
return true;
}
return false;
}
/***
* Sets the file type to be transferred and the format. The type should be
* one of FTP.ASCII_FILE_TYPE ,
* FTP.BINARY_FILE_TYPE , etc. The file type only needs to
* be set when you want to change the type. After changing it, the new
* type stays in effect until you change it again. The default file type
* is FTP.ASCII_FILE_TYPE if this method is never called.
* The format should be one of the FTP class TEXT_FORMAT
* constants, or if the type is FTP.LOCAL_FILE_TYPE , the
* format should be the byte size for that type. The default format
* is FTP.NON_PRINT_TEXT_FORMAT if this method is never
* called.
*
* @param fileType The _FILE_TYPE constant indcating the
* type of file.
* @param formatOrByteSize The format of the file (one of the
* _FORMAT constants. In the case of
* LOCAL_FILE_TYPE, the byte size.
*
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean setFileType(int fileType, int formatOrByteSize)
throws IOException
{
if (FTPReply.isPositiveCompletion(type(fileType, formatOrByteSize)))
{
__fileType = fileType;
__fileFormat = formatOrByteSize;
return true;
}
return false;
}
/***
* Sets the file structure. The default structure is
* FTP.FILE_STRUCTURE if this method is never called.
*
* @param structure The structure of the file (one of the FTP class
* _STRUCTURE constants).
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean setFileStructure(int structure) throws IOException
{
if (FTPReply.isPositiveCompletion(stru(structure)))
{
__fileStructure = structure;
return true;
}
return false;
}
/***
* Sets the transfer mode. The default transfer mode
* FTP.STREAM_TRANSFER_MODE if this method is never called.
*
* @param mode The new transfer mode to use (one of the FTP class
* _TRANSFER_MODE constants).
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean setFileTransferMode(int mode) throws IOException
{
if (FTPReply.isPositiveCompletion(mode(mode)))
{
__fileTransferMode = mode;
return true;
}
return false;
}
/***
* Initiate a server to server file transfer. This method tells the
* server to which the client is connected to retrieve a given file from
* the other server.
*
* @param filename The name of the file to retrieve.
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean remoteRetrieve(String filename) throws IOException
{
if (__dataConnectionMode == ACTIVE_REMOTE_DATA_CONNECTION_MODE ||
__dataConnectionMode == PASSIVE_REMOTE_DATA_CONNECTION_MODE)
return FTPReply.isPositivePreliminary(retr(filename));
return false;
}
/***
* Initiate a server to server file transfer. This method tells the
* server to which the client is connected to store a file on
* the other server using the given filename. The other server must
* have had a remoteRetrieve issued to it by another
* FTPClient.
*
* @param filename The name to call the file that is to be stored.
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean remoteStore(String filename) throws IOException
{
if (__dataConnectionMode == ACTIVE_REMOTE_DATA_CONNECTION_MODE ||
__dataConnectionMode == PASSIVE_REMOTE_DATA_CONNECTION_MODE)
return FTPReply.isPositivePreliminary(stor(filename));
return false;
}
/***
* Initiate a server to server file transfer. This method tells the
* server to which the client is connected to store a file on
* the other server using a unique filename based on the given filename.
* The other server must have had a remoteRetrieve issued
* to it by another FTPClient.
*
* @param filename The name on which to base the filename of the file
* that is to be stored.
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean remoteStoreUnique(String filename) throws IOException
{
if (__dataConnectionMode == ACTIVE_REMOTE_DATA_CONNECTION_MODE ||
__dataConnectionMode == PASSIVE_REMOTE_DATA_CONNECTION_MODE)
return FTPReply.isPositivePreliminary(stou(filename));
return false;
}
/***
* Initiate a server to server file transfer. This method tells the
* server to which the client is connected to store a file on
* the other server using a unique filename.
* The other server must have had a remoteRetrieve issued
* to it by another FTPClient. Many FTP servers require that a base
* filename be given from which the unique filename can be derived. For
* those servers use the other version of remoteStoreUnique
*
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public boolean remoteStoreUnique() throws IOException
{
if (__dataConnectionMode == ACTIVE_REMOTE_DATA_CONNECTION_MODE ||
__dataConnectionMode == PASSIVE_REMOTE_DATA_CONNECTION_MODE)
return FTPReply.isPositivePreliminary(stou());
return false;
}
// For server to server transfers
/***
* Initiate a server to server file transfer. This method tells the
* server to which the client is connected to append to a given file on
* the other server. The other server must have had a
* remoteRetrieve issued to it by another FTPClient.
*
* @param filename The name of the file to be appended to, or if the * file does not exist, the name to call the file being stored. *
* @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean remoteAppend(String filename) throws IOException { if (__dataConnectionMode == ACTIVE_REMOTE_DATA_CONNECTION_MODE || __dataConnectionMode == PASSIVE_REMOTE_DATA_CONNECTION_MODE) return FTPReply.isPositivePreliminary(stor(filename)); return false; } /*** * There are a few FTPClient methods that do not complete the * entire sequence of FTP commands to complete a transaction. These * commands require some action by the programmer after the reception * of a positive intermediate command. After the programmer's code * completes its actions, it must call this method to receive * the completion reply from the server and verify the success of the * entire transaction. *
* For example, *
* InputStream input;
* OutputStream output;
* input = new FileInputStream("foobaz.txt");
* output = ftp.storeFileStream("foobar.txt")
* if(!FTPReply.isPositiveIntermediate(ftp.getReplyCode())) {
* input.close();
* output.close();
* ftp.logout();
* ftp.disconnect();
* System.err.println("File transfer failed.");
* System.exit(1);
* }
* Util.copyStream(input, output);
* input.close();
* output.close();
* // Must call completePendingCommand() to finish command.
* if(!ftp.completePendingCommand()) {
* ftp.logout();
* ftp.disconnect();
* System.err.println("File transfer failed.");
* System.exit(1);
* }
*
* * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean completePendingCommand() throws IOException { return FTPReply.isPositiveCompletion(getReply()); } /*** * Retrieves a named file from the server and writes it to the given * OutputStream. This method does NOT close the given OutputStream. * If the current file type is ASCII, line separators in the file are * converted to the local representation. *
* @param remote The name of the remote file. * @param local The local OutputStream to which to write the file. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception CopyStreamException If an I/O error occurs while actually * transferring the file. The CopyStreamException allows you to * determine the number of bytes transferred and the IOException * causing the error. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean retrieveFile(String remote, OutputStream local) throws IOException { InputStream input; Socket socket; if ((socket = _openDataConnection_(FTPCommand.RETR, remote)) == null) return false; input = new BufferedInputStream(socket.getInputStream(), getBufferSize()); if (__fileType == ASCII_FILE_TYPE) input = new FromNetASCIIInputStream(input); // Treat everything else as binary for now try { Util.copyStream(input, local, getBufferSize(), CopyStreamEvent.UNKNOWN_STREAM_SIZE, null, false); } catch (IOException e) { try { socket.close(); } catch (IOException f) {} throw e; } socket.close(); return completePendingCommand(); } /*** * Returns an InputStream from which a named file from the server * can be read. If the current file type is ASCII, the returned * InputStream will convert line separators in the file to * the local representation. You must close the InputStream when you * finish reading from it. The InputStream itself will take care of * closing the parent data connection socket upon being closed. To * finalize the file transfer you must call * {@link #completePendingCommand completePendingCommand } and * check its return value to verify success. *
* @param remote The name of the remote file. * @return An InputStream from which the remote file can be read. If * the data connection cannot be opened (e.g., the file does not * exist), null is returned (in which case you may check the reply * code to determine the exact reason for failure). * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public InputStream retrieveFileStream(String remote) throws IOException { InputStream input; Socket socket; if ((socket = _openDataConnection_(FTPCommand.RETR, remote)) == null) return null; input = socket.getInputStream(); if (__fileType == ASCII_FILE_TYPE) { // We buffer ascii transfers because the buffering has to // be interposed between FromNetASCIIOutputSream and the underlying // socket input stream. We don't buffer binary transfers // because we don't want to impose a buffering policy on the // programmer if possible. Programmers can decide on their // own if they want to wrap the SocketInputStream we return // for file types other than ASCII. input = new BufferedInputStream(input, getBufferSize()); input = new FromNetASCIIInputStream(input); } return new org.apache.commons.net.io.SocketInputStream(socket, input); } /*** * Stores a file on the server using the given name and taking input * from the given InputStream. This method does NOT close the given * InputStream. If the current file type is ASCII, line separators in * the file are transparently converted to the NETASCII format (i.e., * you should not attempt to create a special InputStream to do this). *
* @param remote The name to give the remote file. * @param local The local InputStream from which to read the file. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception CopyStreamException If an I/O error occurs while actually * transferring the file. The CopyStreamException allows you to * determine the number of bytes transferred and the IOException * causing the error. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean storeFile(String remote, InputStream local) throws IOException { return __storeFile(FTPCommand.STOR, remote, local); } /*** * Returns an OutputStream through which data can be written to store * a file on the server using the given name. If the current file type * is ASCII, the returned OutputStream will convert line separators in * the file to the NETASCII format (i.e., you should not attempt to * create a special OutputStream to do this). You must close the * OutputStream when you finish writing to it. The OutputStream itself * will take care of closing the parent data connection socket upon being * closed. To finalize the file transfer you must call * {@link #completePendingCommand completePendingCommand } and * check its return value to verify success. *
* @param remote The name to give the remote file. * @return An OutputStream through which the remote file can be written. If * the data connection cannot be opened (e.g., the file does not * exist), null is returned (in which case you may check the reply * code to determine the exact reason for failure). * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public OutputStream storeFileStream(String remote) throws IOException { return __storeFileStream(FTPCommand.STOR, remote); } /*** * Appends to a file on the server with the given name, taking input * from the given InputStream. This method does NOT close the given * InputStream. If the current file type is ASCII, line separators in * the file are transparently converted to the NETASCII format (i.e., * you should not attempt to create a special InputStream to do this). *
* @param remote The name of the remote file. * @param local The local InputStream from which to read the data to * be appended to the remote file. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception CopyStreamException If an I/O error occurs while actually * transferring the file. The CopyStreamException allows you to * determine the number of bytes transferred and the IOException * causing the error. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean appendFile(String remote, InputStream local) throws IOException { return __storeFile(FTPCommand.APPE, remote, local); } /*** * Returns an OutputStream through which data can be written to append * to a file on the server with the given name. If the current file type * is ASCII, the returned OutputStream will convert line separators in * the file to the NETASCII format (i.e., you should not attempt to * create a special OutputStream to do this). You must close the * OutputStream when you finish writing to it. The OutputStream itself * will take care of closing the parent data connection socket upon being * closed. To finalize the file transfer you must call * {@link #completePendingCommand completePendingCommand } and * check its return value to verify success. *
* @param remote The name of the remote file. * @return An OutputStream through which the remote file can be appended. * If the data connection cannot be opened (e.g., the file does not * exist), null is returned (in which case you may check the reply * code to determine the exact reason for failure). * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public OutputStream appendFileStream(String remote) throws IOException { return __storeFileStream(FTPCommand.APPE, remote); } /*** * Stores a file on the server using a unique name derived from the * given name and taking input * from the given InputStream. This method does NOT close the given * InputStream. If the current file type is ASCII, line separators in * the file are transparently converted to the NETASCII format (i.e., * you should not attempt to create a special InputStream to do this). *
* @param remote The name on which to base the unique name given to * the remote file. * @param local The local InputStream from which to read the file. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception CopyStreamException If an I/O error occurs while actually * transferring the file. The CopyStreamException allows you to * determine the number of bytes transferred and the IOException * causing the error. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean storeUniqueFile(String remote, InputStream local) throws IOException { return __storeFile(FTPCommand.STOU, remote, local); } /*** * Returns an OutputStream through which data can be written to store * a file on the server using a unique name derived from the given name. * If the current file type * is ASCII, the returned OutputStream will convert line separators in * the file to the NETASCII format (i.e., you should not attempt to * create a special OutputStream to do this). You must close the * OutputStream when you finish writing to it. The OutputStream itself * will take care of closing the parent data connection socket upon being * closed. To finalize the file transfer you must call * {@link #completePendingCommand completePendingCommand } and * check its return value to verify success. *
* @param remote The name on which to base the unique name given to * the remote file. * @return An OutputStream through which the remote file can be written. If * the data connection cannot be opened (e.g., the file does not * exist), null is returned (in which case you may check the reply * code to determine the exact reason for failure). * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public OutputStream storeUniqueFileStream(String remote) throws IOException { return __storeFileStream(FTPCommand.STOU, remote); } /** * Stores a file on the server using a unique name assigned by the * server and taking input from the given InputStream. This method does * NOT close the given * InputStream. If the current file type is ASCII, line separators in * the file are transparently converted to the NETASCII format (i.e., * you should not attempt to create a special InputStream to do this). *
* @param local The local InputStream from which to read the file. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception CopyStreamException If an I/O error occurs while actually * transferring the file. The CopyStreamException allows you to * determine the number of bytes transferred and the IOException * causing the error. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. */ public boolean storeUniqueFile(InputStream local) throws IOException { return __storeFile(FTPCommand.STOU, null, local); } /** * Returns an OutputStream through which data can be written to store * a file on the server using a unique name assigned by the server. * If the current file type * is ASCII, the returned OutputStream will convert line separators in * the file to the NETASCII format (i.e., you should not attempt to * create a special OutputStream to do this). You must close the * OutputStream when you finish writing to it. The OutputStream itself * will take care of closing the parent data connection socket upon being * closed. To finalize the file transfer you must call * {@link #completePendingCommand completePendingCommand } and * check its return value to verify success. *
* @return An OutputStream through which the remote file can be written. If * the data connection cannot be opened (e.g., the file does not * exist), null is returned (in which case you may check the reply * code to determine the exact reason for failure). * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. */ public OutputStream storeUniqueFileStream() throws IOException { return __storeFileStream(FTPCommand.STOU, null); } /*** * Reserve a number of bytes on the server for the next file transfer. *
* @param bytes The number of bytes which the server should allocate. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean allocate(int bytes) throws IOException { return FTPReply.isPositiveCompletion(allo(bytes)); } /** * Reserve space on the server for the next file transfer. *
* @param bytes The number of bytes which the server should allocate.
* @param recordSize The size of a file record.
* @return True if successfully completed, false if not.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
*/
public boolean allocate(int bytes, int recordSize) throws IOException
{
return FTPReply.isPositiveCompletion(allo(bytes, recordSize));
}
/***
* Restart a STREAM_TRANSFER_MODE file transfer starting
* from the given offset. This will only work on FTP servers supporting
* the REST comand for the stream transfer mode. However, most FTP
* servers support this. Any subsequent file transfer will start
* reading or writing the remote file from the indicated offset.
*
* @param offset The offset into the remote file at which to start the * next file transfer. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ private boolean restart(long offset) throws IOException { __restartOffset = 0; return FTPReply.isPositiveIntermediate(rest(Long.toString(offset))); } /*** * Sets the restart offset. The restart command is sent to the server * only before sending the file transfer command. When this is done, * the restart marker is reset to zero. *
* @param offset The offset into the remote file at which to start the * next file transfer. This must be a value greater than or * equal to zero. ***/ public void setRestartOffset(long offset) { if (offset >= 0) __restartOffset = offset; } /*** * Fetches the restart offset. *
* @return offset The offset into the remote file at which to start the * next file transfer. ***/ public long getRestartOffset() { return __restartOffset; } /*** * Renames a remote file. *
* @param from The name of the remote file to rename. * @param to The new name of the remote file. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean rename(String from, String to) throws IOException { if (!FTPReply.isPositiveIntermediate(rnfr(from))) return false; return FTPReply.isPositiveCompletion(rnto(to)); } /*** * Abort a transfer in progress. *
* @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean abort() throws IOException { return FTPReply.isPositiveCompletion(abor()); } /*** * Deletes a file on the FTP server. *
* @param pathname The pathname of the file to be deleted. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean deleteFile(String pathname) throws IOException { return FTPReply.isPositiveCompletion(dele(pathname)); } /*** * Removes a directory on the FTP server (if empty). *
* @param pathname The pathname of the directory to remove. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean removeDirectory(String pathname) throws IOException { return FTPReply.isPositiveCompletion(rmd(pathname)); } /*** * Creates a new subdirectory on the FTP server in the current directory * (if a relative pathname is given) or where specified (if an absolute * pathname is given). *
* @param pathname The pathname of the directory to create. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean makeDirectory(String pathname) throws IOException { return FTPReply.isPositiveCompletion(mkd(pathname)); } /*** * Returns the pathname of the current working directory. *
* @return The pathname of the current working directory. If it cannot * be obtained, returns null. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public String printWorkingDirectory() throws IOException { if (pwd() != FTPReply.PATHNAME_CREATED) return null; return __parsePathname(_replyLines.get( _replyLines.size() - 1)); } /** * Send a site specific command. * @param arguments The site specific command and arguments. * @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. */ public boolean sendSiteCommand(String arguments) throws IOException { return FTPReply.isPositiveCompletion(site(arguments)); } /*** * Fetches the system type name from the server and returns the string. * This value is cached for the duration of the connection after the * first call to this method. In other words, only the first time * that you invoke this method will it issue a SYST command to the * FTP server. FTPClient will remember the value and return the * cached value until a call to disconnect. *
* @return The system type name obtained from the server. null if the * information could not be obtained. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public String getSystemName() throws IOException { //if (syst() == FTPReply.NAME_SYSTEM_TYPE) // Technically, we should expect a NAME_SYSTEM_TYPE response, but // in practice FTP servers deviate, so we soften the condition to // a positive completion. if (__systemName == null && FTPReply.isPositiveCompletion(syst())) __systemName = _replyLines.get(_replyLines.size() - 1).substring(4); return __systemName; } /*** * Fetches the system help information from the server and returns the * full string. *
* @return The system help string obtained from the server. null if the * information could not be obtained. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public String listHelp() throws IOException { if (FTPReply.isPositiveCompletion(help())) return getReplyString(); return null; } /** * Fetches the help information for a given command from the server and * returns the full string. * @param command The command on which to ask for help. * @return The command help string obtained from the server. null if the * information could not be obtained. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. */ public String listHelp(String command) throws IOException { if (FTPReply.isPositiveCompletion(help(command))) return getReplyString(); return null; } /*** * Sends a NOOP command to the FTP server. This is useful for preventing * server timeouts. *
* @return True if successfully completed, false if not. * @exception FTPConnectionClosedException * If the FTP server prematurely closes the connection as a result * of the client being idle or some other reason causing the server * to send FTP reply code 421. This exception may be caught either * as an IOException or independently as itself. * @exception IOException If an I/O error occurs while either sending a * command to the server or receiving a reply from the server. ***/ public boolean sendNoOp() throws IOException { return FTPReply.isPositiveCompletion(noop()); } /*** * Obtain a list of filenames in a directory (or just the name of a given * file, which is not particularly useful). This information is obtained * through the NLST command. If the given pathname is a directory and * contains no files, a zero length array is returned only * if the FTP server returned a positive completion code, otherwise * null is returned (the FTP server returned a 550 error No files found.). * If the directory is not empty, an array of filenames in the directory is * returned. If the pathname corresponds * to a file, only that file will be listed. The server may or may not * expand glob expressions. *
* @param pathname The file or directory to list.
* @return The list of filenames contained in the given path. null if
* the list could not be obtained. If there are no filenames in
* the directory, a zero-length array is returned.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public String[] listNames(String pathname) throws IOException
{
String line;
Socket socket;
BufferedReader reader;
ArrayList
* @return The list of filenames contained in the current working
* directory. null if the list could not be obtained.
* If there are no filenames in the directory, a zero-length array
* is returned.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public String[] listNames() throws IOException
{
return listNames(null);
}
/**
* Using the default system autodetect mechanism, obtain a
* list of file information for the current working directory
* or for just a single file.
*
* This information is obtained through the LIST command. The contents of
* the returned array is determined by the
* @param pathname The file or directory to list. Since the server may
* or may not expand glob expressions, using them here
* is not recommended and may well cause this method to
* fail.
*
* @return The list of file information contained in the given path in
* the format determined by the autodetection mechanism
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection
* as a result of the client being idle or some other
* reason causing the server to send FTP reply code 421.
* This exception may be caught either as an IOException
* or independently as itself.
* @exception IOException
* If an I/O error occurs while either sending a
* command to the server or receiving a reply
* from the server.
* @exception ParserInitializationException
* Thrown if the parserKey parameter cannot be
* resolved by the selected parser factory.
* In the DefaultFTPEntryParserFactory, this will
* happen when parserKey is neither
* the fully qualified class name of a class
* implementing the interface
* org.apache.commons.net.ftp.FTPFileEntryParser
* nor a string containing one of the recognized keys
* mapping to such a parser or if class loader
* security issues prevent its being loaded.
* @see org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory
* @see org.apache.commons.net.ftp.parser.FTPFileEntryParserFactory
* @see org.apache.commons.net.ftp.FTPFileEntryParser
*/
public FTPFile[] listFiles(String pathname)
throws IOException
{
String key = null;
FTPListParseEngine engine =
initiateListParsing(key, pathname);
return engine.getFiles();
}
/**
* Using the default system autodetect mechanism, obtain a
* list of file information for the current working directory.
*
* This information is obtained through the LIST command. The contents of
* the returned array is determined by the
* @return The list of file information contained in the current directory
* in the format determined by the autodetection mechanism.
*
* NOTE: This array may contain null members if any of the
* individual file listings failed to parse. The caller should
* check each entry for null before referencing it.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection
* as a result of the client being idle or some other
* reason causing the server to send FTP reply code 421.
* This exception may be caught either as an IOException
* or independently as itself.
* @exception IOException
* If an I/O error occurs while either sending a
* command to the server or receiving a reply
* from the server.
* @exception ParserInitializationException
* Thrown if the parserKey parameter cannot be
* resolved by the selected parser factory.
* In the DefaultFTPEntryParserFactory, this will
* happen when parserKey is neither
* the fully qualified class name of a class
* implementing the interface
* org.apache.commons.net.ftp.FTPFileEntryParser
* nor a string containing one of the recognized keys
* mapping to such a parser or if class loader
* security issues prevent its being loaded.
* @see org.apache.commons.net.ftp.parser.DefaultFTPFileEntryParserFactory
* @see org.apache.commons.net.ftp.parser.FTPFileEntryParserFactory
* @see org.apache.commons.net.ftp.FTPFileEntryParser
*/
public FTPFile[] listFiles()
throws IOException
{
return listFiles((String) null);
}
/**
* Using the default autodetect mechanism, initialize an FTPListParseEngine
* object containing a raw file information for the current working
* directory on the server
* This information is obtained through the LIST command. This object
* is then capable of being iterated to return a sequence of FTPFile
* objects with information filled in by the
*
* This method differs from using the listFiles() methods in that
* expensive FTPFile objects are not created until needed which may be
* an advantage on large lists.
*
* @return A FTPListParseEngine object that holds the raw information and
* is capable of providing parsed FTPFile objects, one for each file
* containing information contained in the given path in the format
* determined by the
* The server may or may not expand glob expressions. You should avoid
* using glob expressions because the return format for glob listings
* differs from server to server and will likely cause this method to fail.
*
* This method differs from using the listFiles() methods in that
* expensive FTPFile objects are not created until needed which may be
* an advantage on large lists.
*
*
* The server may or may not expand glob expressions. You should avoid
* using glob expressions because the return format for glob listings
* differs from server to server and will likely cause this method to fail.
*
* This method differs from using the listFiles() methods in that
* expensive FTPFile objects are not created until needed which may be
* an advantage on large lists.
*
* @param parserKey A string representing a designated code or fully-qualified
* class name of an
* @return The status information returned by the server.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public String getStatus() throws IOException
{
if (FTPReply.isPositiveCompletion(stat()))
return getReplyString();
return null;
}
/***
* Issue the FTP STAT command to the server for a given pathname. This
* should produce a listing of the file or directory.
*
* @return The status information returned by the server.
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
***/
public String getStatus(String pathname) throws IOException
{
if (FTPReply.isPositiveCompletion(stat(pathname)))
return getReplyString();
return null;
}
/**
* Issue the FTP MDTM command (not supported by all servers to retrieve the last
* modification time of a file. The modification string should be in the
* ISO 3077 form "YYYYMMDDhhmmss(.xxx)?". The timestamp represented should also be in
* GMT, but not all FTP servers honour this.
*
* @param pathname The file path to query.
* @return A string representing the last file modification time in FTPFileEntryParser
* used.
* FTPFileEntryParser
* used.
* FTPFileEntryParser used.
* parser parameter. Null will be
* returned if a data connection cannot be opened. If the current working
* directory contains no files, an empty array will be the return.
*
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException
* If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
* @exception ParserInitializationException
* Thrown if the autodetect mechanism cannot
* resolve the type of system we are connected with.
* @see FTPListParseEngine
*/
public FTPListParseEngine initiateListParsing()
throws IOException
{
return initiateListParsing((String) null);
}
/**
* Using the default autodetect mechanism, initialize an FTPListParseEngine
* object containing a raw file information for the supplied directory.
* This information is obtained through the LIST command. This object
* is then capable of being iterated to return a sequence of FTPFile
* objects with information filled in by the
* FTPFileEntryParser used.
*
* FTPClient f=FTPClient();
* f.connect(server);
* f.login(username, password);
* FTPListParseEngine engine = f.initiateListParsing(directory);
*
* while (engine.hasNext()) {
* FTPFile[] files = engine.getNext(25); // "page size" you want
* //do whatever you want with these files, display them, etc.
* //expensive FTPFile objects not created until needed.
* }
*
*
* @return A FTPListParseEngine object that holds the raw information and
* is capable of providing parsed FTPFile objects, one for each file
* containing information contained in the given path in the format
* determined by the parser parameter. Null will be
* returned if a data connection cannot be opened. If the current working
* directory contains no files, an empty array will be the return.
*
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException
* If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
* @exception ParserInitializationException
* Thrown if the autodetect mechanism cannot
* resolve the type of system we are connected with.
* @see FTPListParseEngine
*/
public FTPListParseEngine initiateListParsing(
String pathname)
throws IOException
{
String key = null;
return initiateListParsing(key, pathname);
}
/**
* Using the supplied parser key, initialize an FTPListParseEngine
* object containing a raw file information for the supplied directory.
* This information is obtained through the LIST command. This object
* is then capable of being iterated to return a sequence of FTPFile
* objects with information filled in by the
* FTPFileEntryParser used.
* FTPFileEntryParser that should be
* used to parse each server file listing.
*
* @return A FTPListParseEngine object that holds the raw information and
* is capable of providing parsed FTPFile objects, one for each file
* containing information contained in the given path in the format
* determined by the parser parameter. Null will be
* returned if a data connection cannot be opened. If the current working
* directory contains no files, an empty array will be the return.
*
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException
* If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
* @exception ParserInitializationException
* Thrown if the parserKey parameter cannot be
* resolved by the selected parser factory.
* In the DefaultFTPEntryParserFactory, this will
* happen when parserKey is neither
* the fully qualified class name of a class
* implementing the interface
* org.apache.commons.net.ftp.FTPFileEntryParser
* nor a string containing one of the recognized keys
* mapping to such a parser or if class loader
* security issues prevent its being loaded.
* @see FTPListParseEngine
*/
public FTPListParseEngine initiateListParsing(
String parserKey, String pathname)
throws IOException
{
// We cache the value to avoid creation of a new object every
// time a file listing is generated.
if(__entryParser == null) {
if (null != parserKey) {
// if a parser key was supplied in the parameters,
// use that to create the paraser
__entryParser =
__parserFactory.createFileEntryParser(parserKey);
} else {
// if no parserKey was supplied, check for a configuration
// in the params, and if non-null, use that.
if (null != __configuration) {
__entryParser =
__parserFactory.createFileEntryParser(__configuration);
} else {
// if a parserKey hasn't been supplied, and a configuration
// hasn't been supplied, then autodetect by calling
// the SYST command and use that to choose the parser.
__entryParser =
__parserFactory.createFileEntryParser(getSystemName());
}
}
}
return initiateListParsing(__entryParser, pathname);
}
/**
* private method through which all listFiles() and
* initiateListParsing methods pass once a parser is determined.
*
* @exception FTPConnectionClosedException
* If the FTP server prematurely closes the connection as a result
* of the client being idle or some other reason causing the server
* to send FTP reply code 421. This exception may be caught either
* as an IOException or independently as itself.
* @exception IOException
* If an I/O error occurs while either sending a
* command to the server or receiving a reply from the server.
* @see FTPListParseEngine
*/
private FTPListParseEngine initiateListParsing(
FTPFileEntryParser parser, String pathname)
throws IOException
{
Socket socket;
FTPListParseEngine engine = new FTPListParseEngine(parser);
if ((socket = _openDataConnection_(FTPCommand.LIST, getListArguments(pathname))) == null)
{
return engine;
}
try {
engine.readServerList(socket.getInputStream(), getControlEncoding());
}
finally {
socket.close();
}
completePendingCommand();
return engine;
}
/**
* @since 2.0
*/
protected String getListArguments(String pathname) {
if (getListHiddenFiles())
{
StringBuffer sb = new StringBuffer(pathname.length() + 3);
sb.append("-a ");
sb.append(pathname);
return sb.toString();
}
return pathname;
}
/***
* Issue the FTP STAT command to the server.
* YYYYMMDDhhmmss format.
* @throws IOException if an I/O error occurs.
* @since 2.0
*/
public String getModificationTime(String pathname) throws IOException {
if (FTPReply.isPositiveCompletion(mdtm(pathname)))
return getReplyString();
return null;
}
/**
* Set the internal buffer size.
*
* @param bufSize The size of the buffer
*/
public void setBufferSize(int bufSize) {
__bufferSize = bufSize;
}
/**
* Retrieve the current internal buffer size.
* @return The current buffer size.
*/
public int getBufferSize() {
return __bufferSize;
}
/**
* Implementation of the {@link Configurable Configurable} interface.
* In the case of this class, configuring merely makes the config object available for the
* factory methods that construct parsers.
* @param config {@link FTPClientConfig FTPClientConfig} object used to
* provide non-standard configurations to the parser.
* @since 1.4
*/
public void configure(FTPClientConfig config) {
this.__configuration = config;
}
/**
* You can set this to true if you would like to get hidden files when {@link #listFiles} too.
* A LIST -a will be issued to the ftp server.
* It depends on your ftp server if you need to call this method, also dont expect to get rid
* of hidden files if you call this method with "false".
*
* @param listHiddenFiles true if hidden files should be listed
* @since 2.0
*/
public void setListHiddenFiles(boolean listHiddenFiles) {
this.__listHiddenFiles = listHiddenFiles;
}
/**
* @see #setListHiddenFiles(boolean)
* @return the current state
* @since 2.0
*/
public boolean getListHiddenFiles() {
return this.__listHiddenFiles;
}
}
/* Emacs configuration
* Local variables: **
* mode: java **
* c-basic-offset: 4 **
* indent-tabs-mode: nil **
* End: **
*/