diff options
Diffstat (limited to 'libjava/classpath/gnu/java/net/protocol/ftp/ActiveModeDTP.java')
| -rw-r--r-- | libjava/classpath/gnu/java/net/protocol/ftp/ActiveModeDTP.java | 251 |
1 files changed, 251 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/net/protocol/ftp/ActiveModeDTP.java b/libjava/classpath/gnu/java/net/protocol/ftp/ActiveModeDTP.java new file mode 100644 index 000000000..1ed31b830 --- /dev/null +++ b/libjava/classpath/gnu/java/net/protocol/ftp/ActiveModeDTP.java @@ -0,0 +1,251 @@ +/* ActiveModeDTP.java -- + Copyright (C) 2003, 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath is distributed in the hope that it will be useful, but +WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +General Public License for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + + +package gnu.java.net.protocol.ftp; + +import java.io.IOException; +import java.io.InputStream; +import java.io.OutputStream; +import java.net.InetAddress; +import java.net.ServerSocket; +import java.net.Socket; + +/** + * An active mode FTP data transfer process. + * This starts a server on the specified port listening for a data + * connection. It converts the socket input into a file stream for reading. + * + * @author Chris Burdess (dog@gnu.org) + */ +final class ActiveModeDTP + implements DTP, Runnable +{ + + ServerSocket server; + Socket socket; + DTPInputStream in; + DTPOutputStream out; + boolean completed; + boolean inProgress; + int transferMode; + IOException exception; + Thread acceptThread; + int connectionTimeout; + + ActiveModeDTP(InetAddress localhost, int port, + int connectionTimeout, int timeout) + throws IOException + { + completed = false; + inProgress = false; + server = new ServerSocket(port, 1, localhost); + if (timeout > 0) + { + server.setSoTimeout(timeout); + } + if (connectionTimeout <= 0) + { + connectionTimeout = 20000; + } + this.connectionTimeout = connectionTimeout; + acceptThread = new Thread(this, "ActiveModeDTP"); + acceptThread.setDaemon(true); + acceptThread.start(); + } + + /** + * Start listening. + */ + public void run() + { + try + { + socket = server.accept(); + //System.err.println("Accepted connection from "+socket.getInetAddress()+":"+socket.getPort()); + } + catch (IOException e) + { + exception = e; + } + } + + /** + * Waits until a client has connected. + */ + public void waitFor() + throws IOException + { + try + { + acceptThread.join(connectionTimeout); + } + catch (InterruptedException e) + { + } + if (exception != null) + { + throw exception; + } + if (socket == null) + { + server.close(); + throw new IOException("client did not connect before timeout"); + } + acceptThread = null; + } + + /** + * Returns an input stream from which a remote file can be read. + */ + public InputStream getInputStream() + throws IOException + { + if (inProgress) + { + throw new IOException("Transfer in progress"); + } + if (acceptThread != null) + { + waitFor(); + } + switch (transferMode) + { + case FTPConnection.MODE_STREAM: + in = new StreamInputStream(this, socket.getInputStream()); + break; + case FTPConnection.MODE_BLOCK: + in = new BlockInputStream(this, socket.getInputStream()); + break; + case FTPConnection.MODE_COMPRESSED: + in = new CompressedInputStream(this, socket.getInputStream()); + break; + default: + throw new IllegalStateException("invalid transfer mode"); + } + in.setTransferComplete(false); + return in; + } + + /** + * Returns an output stream to which a local file can be written for + * upload. + */ + public OutputStream getOutputStream() throws IOException + { + if (inProgress) + { + throw new IOException("Transfer in progress"); + } + if (acceptThread != null) + { + waitFor(); + } + switch (transferMode) + { + case FTPConnection.MODE_STREAM: + out = new StreamOutputStream(this, socket.getOutputStream()); + break; + case FTPConnection.MODE_BLOCK: + out = new BlockOutputStream(this, socket.getOutputStream()); + break; + case FTPConnection.MODE_COMPRESSED: + out = new CompressedOutputStream(this, socket.getOutputStream()); + break; + default: + throw new IllegalStateException("invalid transfer mode"); + } + out.setTransferComplete(false); + return out; + } + + public void setTransferMode(int mode) + { + transferMode = mode; + } + + public void complete() + { + completed = true; + if (!inProgress) + { + transferComplete(); + } + } + + public boolean abort() + { + completed = true; + transferComplete(); + return inProgress; + } + + public void transferComplete() + { + if (socket == null) + { + return; + } + if (in != null) + { + in.setTransferComplete(true); + } + if (out != null) + { + out.setTransferComplete(true); + } + completed = completed || (transferMode == FTPConnection.MODE_STREAM); + if (completed && socket != null) + { + try + { + socket.close(); + } + catch (IOException e) + { + } + try + { + server.close(); + } + catch (IOException e) + { + } + } + } + +} |