/** Sets remote server to striped passive server mode (SPAS). */
public HostPortList setStripedPassive() throws IOException, ServerException {
Command cmd = new Command("SPAS", (controlChannel.isIPv6()) ? "2" : null);
Reply reply = null;
try {
reply = controlChannel.execute(cmd);
} catch (UnexpectedReplyCodeException urce) {
throw ServerException.embedUnexpectedReplyCodeException(urce);
} catch (FTPReplyParseException rpe) {
throw ServerException.embedFTPReplyParseException(rpe);
}
this.gSession.serverMode = GridFTPSession.SERVER_EPAS;
if (controlChannel.isIPv6()) {
gSession.serverAddressList = HostPortList.parseIPv6Format(reply.getMessage());
int size = gSession.serverAddressList.size();
for (int i = 0; i < size; i++) {
HostPort6 hp = (HostPort6) gSession.serverAddressList.get(i);
if (hp.getHost() == null) {
hp.setVersion(HostPort6.IPv6);
hp.setHost(controlChannel.getHost());
}
}
} else {
gSession.serverAddressList = HostPortList.parseIPv4Format(reply.getMessage());
}
return gSession.serverAddressList;
}
/**
* Establishes a secure and authenticated context with the server.
*
* @param factory factory for creating the DssContext of the secure session
* @param username specific username to authenticate as.
* @throws IOException on i/o error
* @throws ServerException on server refusal or faulty server behavior
*/
public void authenticate(DssContextFactory factory, String username)
throws IOException, ServerException {
try {
// authenticate
GridFTPControlChannel gridFTPControlChannel =
new GridFTPControlChannel(controlChannel, factory, expectedHostName);
// from now on, the commands and replies
// are protected and pass through gsi wrapped socket
// login
try {
Reply reply =
gridFTPControlChannel.exchange(
new Command("USER", (username == null) ? ":globus-mapping:" : username));
// wu-gsiftp sends intermediate code while
// gssftp send completion reply code
if (!Reply.isPositiveCompletion(reply) && !Reply.isPositiveIntermediate(reply)) {
throw ServerException.embedUnexpectedReplyCodeException(
new UnexpectedReplyCodeException(reply), "User authorization failed.");
}
} catch (FTPReplyParseException rpe) {
throw ServerException.embedFTPReplyParseException(
rpe, "Received faulty reply to USER command.");
}
try {
Reply reply = gridFTPControlChannel.exchange(new Command("PASS", "dummy"));
if (!Reply.isPositiveCompletion(reply)) {
throw ServerException.embedUnexpectedReplyCodeException(
new UnexpectedReplyCodeException(reply), "Bad password.");
}
} catch (FTPReplyParseException rpe) {
throw ServerException.embedFTPReplyParseException(
rpe, "Received faulty reply to PASS command.");
}
this.gSession.authorized = true;
this.username = username;
this.controlChannel = gridFTPControlChannel;
// quietly send version information to the server.
// ignore errors
try {
this.site(usageString);
} catch (Exception ex) {
}
} catch (ServerException | IOException e) {
close();
throw e;
}
}
/**
* Computes and returns a checksum of a file. transferred.
*
* @param algorithm the checksume algorithm
* @param offset the offset
* @param length the length
* @param file file to compute checksum of
* @return the computed checksum
* @throws ServerException if an error occured.
*/
public String checksum(ChecksumAlgorithm algorithm, long offset, long length, String file)
throws IOException, ServerException {
String arguments =
algorithm.toFtpCmdArgument()
+ " "
+ String.valueOf(offset)
+ " "
+ String.valueOf(length)
+ " "
+ file;
Command cmd = new Command("CKSM", arguments);
Reply reply = null;
try {
reply = controlChannel.execute(cmd);
return reply.getMessage();
} catch (UnexpectedReplyCodeException urce) {
throw ServerException.embedUnexpectedReplyCodeException(urce);
} catch (FTPReplyParseException rpe) {
throw ServerException.embedFTPReplyParseException(rpe);
}
}
