List of usage examples for org.apache.commons.net.ssh SSHClient isConnected
@Override public boolean isConnected()
From source file:org.smallfoot.filexfer.ApacheCommonsNetSFTP.java
/** * Attempt an upload to the remote server. Initially very basic, this can be extended for all the intelligence we need to get data through. * * This function, given a filename, connects to an FTP server and attempts to store the file. * Initially the username and password are defaulted to those usable to upload from PAK_RED, but * later (when i can look at URL factories) this can be extended. The capability will be * preserved to give the function a list of statuses and a position so that a later threaded * design can try a number of uploads in parallel, ditching all but the most efficient: on * connection, so status-indiciates; on successful 1-k upload with a temp filename, * status-indicates finished 1k, and checks whether others are -- if others are ahead of it, * status-indicates as "losing" and deletes its temp file; others behind it will so-suicide; if * it's the non-losing, then this thread "continues" the upload from 1k, or deletes/restarts if * continuation is impossible. In that way, the fastest connection continues, the others give * up, timeouts are handled implicitly.//from w ww . ja v a 2 s . co m * * Where possible, checksum post-upload is verified * * Where possible, a checksum file {filename}.sum is uploaded * Where possible, a manifest XML file is sent (my hostname, my user ID, any tasks or objectives, etc) * * @param file filename to upload * @param uploadNotify array of identifiers (email address or jabber contacts) to list as notify recipients in the upload checksum file * @return "OK, ##", "FAIL, ##", "UNKNOWN" based on results (where "##" is a line number of variable length) */ public boolean upload(File file, Vector<String> uploadNotify) throws FileTransferWinchException { String checksum = null; SSHClient ssh = new SSHClient(); try { checksum = checksum(file); } catch (java.security.NoSuchAlgorithmException nsae) { throw new FileTransferChecksumMismatchException( "Checksum algorithm \"MD5\" is not available on this platform"); } catch (java.io.FileNotFoundException fnfe) { throw new FileTransferWinchException("Local file not readable", fnfe); } catch (java.io.IOException ioe) { throw new FileTransferWinchException("I/O Error reading local file", ioe); } String targetPath = getPath(); if ((null == targetPath) || (0 == targetPath.length())) targetPath = "."; String checksumnote = "# MD5 checksum (see RFC-1321)\n" + "# Verify using: \n" + "# Windows:\n" + "# see http://support.microsoft.com/kb/841290\n" + "# VICT.BAT -c " + file.getName() + "\n" + "# MacOSX, BSD-based systems:\n" + "# md5 " + file.getName() + "\n" + "# Linux (ie Redhat, CentOS, Debian, Ubuntu):\n" + "# md5sum " + file.getName() + "\n" + "# md5sum -c " + file.getName() + ".sum\n" + "# Practically every platform:\n" + "# java -jar vict.jar -c " + file.getName() + "\n"; if (null != uploadNotify) for (String s : uploadNotify) checksumnote += "# NOTIFY: " + s + "\n"; String checksumline = checksum + " " + file.getName(); System.out.println("connecting to upload " + file.getName() + " (" + checksumline + ")"); checksumline += "\n"; try { ssh.loadKnownHosts(); //System.out.println ("connecting to "+getHost() +" port "+getPort()+ " to transfer "+ file.getName()); ssh.connect(getHost()); //System.out.println ("authorizing to "+getHost()+" using \""+getUser()+"\", \""+getPass()+"\""); if ((null != getPass()) && (getPass().length() > 0)) { //System.out.println ("authorizing u p"); /* lacking a java.security.Security.addProvider(new org.bouncycastle.jce.provider.BouncyCastleProvider()); the following line simply generates a org.apache.commons.net.ssh.userauth.UserAuthException */ ssh.authPassword(getUser(), getPass()); //System.out.println ("authorized u p"); } else { //System.out.println ("authorizing u k"); ssh.authPublickey(getUser()); //System.out.println ("authorized u k"); } //System.out.println ("uploading " + file.getName()); File temp = File.createTempFile(file.getName(), ".tmp"); //System.out.println ("created " + temp.getAbsolutePath()); java.io.FileOutputStream tempo = new java.io.FileOutputStream(temp); tempo.write(checksumnote.getBytes(), 0, checksumnote.length()); tempo.write(checksumline.getBytes(), 0, checksumline.length()); tempo.flush(); ssh.newSFTPClient().put(temp.getAbsolutePath(), targetPath/* getPath()+file.getName()+".sum" */); tempo.close(); if (!temp.delete()) temp.deleteOnExit(); ssh.newSFTPClient().put(file.getName(), targetPath /* getPath()+file.getName() */ ); //it.sauronsoftware.ftp4j.FTPReply reply = client.sendCustomCommand("XMD5 \""+file.getName()+"\""); ssh.disconnect(); //System.out.println ("MD5 (XMD5): server offers no checksum, so you're on your own..."); return false; } catch (org.apache.commons.net.ssh.userauth.UserAuthException uae) { throw new FileTransferWinchException("Authentication failure: " + uae); } catch (java.io.IOException ioe) { ioe.printStackTrace(); throw new FileTransferIllegalFSMReplyException( "Uploading " + file.getName() + ": IO Error: " + ioe.getMessage(), ioe); } /* catch (it.sauronsoftware.ftp4j.FTPIllegalReplyException fire) { throw new FileTransferIllegalFSMReplyException("Uploading " + file.getName() + ": (FSM) Illegal FTP response: " + fire.getMessage(), fire); } catch (it.sauronsoftware.ftp4j.FTPException fe) { throw new FileTransferDataTransferException("Uploading " + file.getName() + ": (xFTE) Illegal FTP response: " + fe.getMessage(), fe); } catch (it.sauronsoftware.ftp4j.FTPDataTransferException fdte) { throw new FileTransferDataTransferException("Uploading " + file.getName() + ": (DTE) Illegal FTP response: " + fdte.getMessage(), fdte); } catch (it.sauronsoftware.ftp4j.FTPAbortedException fae) { throw new FileTransferDataTransferException("Uploading " + file.getName() + ": FTP aborted: " + fae.getMessage(), fae); } */ finally { if (ssh.isConnected()) try { ssh.disconnect(); } catch (java.io.IOException ioe) { throw new FileTransferWinchException("tearing down ssh connection under exception", ioe); } } }