session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, "RETR", null));
return;
}
// call Ftplet.onDownloadStart() method
Ftplet ftpletContainer = context.getFtpletContainer();
FtpletEnum ftpletRet;
try {
ftpletRet = ftpletContainer.onDownloadStart(session.getFtpletSession(), request);
} catch(Exception e) {
LOG.debug("Ftplet container threw exception", e);
ftpletRet = FtpletEnum.RET_DISCONNECT;
}
if(ftpletRet == FtpletEnum.RET_SKIP) {
return;
}
else if(ftpletRet == FtpletEnum.RET_DISCONNECT) {
session.closeOnFlush().awaitUninterruptibly(10000);
return;
}
// get file object
FileObject file = null;
try {
file = session.getFileSystemView().getFileObject(fileName);
}
catch(Exception ex) {
LOG.debug("Exception getting file object", ex);
}
if(file == null) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "RETR.missing", fileName));
return;
}
fileName = file.getFullName();
// check file existance
if(!file.doesExist()) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "RETR.missing", fileName));
return;
}
// check valid file
if(!file.isFile()) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "RETR.invalid", fileName));
return;
}
// check permission
if(!file.hasReadPermission()) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "RETR.permission", fileName));
return;
}
// 24-10-2007 - added check if PORT or PASV is issued, see https://issues.apache.org/jira/browse/FTPSERVER-110
DataConnectionFactory connFactory = session.getDataConnection();
if (connFactory instanceof IODataConnectionFactory) {
InetAddress address = ((IODataConnectionFactory)connFactory).getInetAddress();
if (address == null) {
session.write(new DefaultFtpReply(FtpReply.REPLY_503_BAD_SEQUENCE_OF_COMMANDS, "PORT or PASV must be issued first"));
return;
}
}
// get data connection
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_150_FILE_STATUS_OKAY, "RETR", null));
// send file data to client
boolean failure = false;
InputStream is = null;
DataConnection dataConnection;
try {
dataConnection = session.getDataConnection().openConnection();
} catch (Exception e) {
LOG.debug("Exception getting the output data stream", e);
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_425_CANT_OPEN_DATA_CONNECTION, "RETR", null));
return;
}
try {
// open streams
is = openInputStream(session, file, skipLen);
// transfer data
long transSz = dataConnection.transferToClient(is);
// log message
String userName = session.getUser().getName();
LOG.info("File download : " + userName + " - " + fileName);
// notify the statistics component
ServerFtpStatistics ftpStat = (ServerFtpStatistics)context.getFtpStatistics();
if(ftpStat != null) {
ftpStat.setDownload(session, file, transSz);
}
}
catch(SocketException ex) {
LOG.debug("Socket exception during data transfer", ex);
failure = true;
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_426_CONNECTION_CLOSED_TRANSFER_ABORTED, "RETR", fileName));
}
catch(IOException ex) {
LOG.debug("IOException during data transfer", ex);
failure = true;
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_551_REQUESTED_ACTION_ABORTED_PAGE_TYPE_UNKNOWN, "RETR", fileName));
}
finally {
IoUtils.close(is);
}
// if data transfer ok - send transfer complete message
if(!failure) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_226_CLOSING_DATA_CONNECTION, "RETR", fileName));
// call Ftplet.onDownloadEnd() method
try {
ftpletRet = ftpletContainer.onDownloadEnd(session.getFtpletSession(), request);
} catch(Exception e) {
LOG.debug("Ftplet container threw exception", e);
ftpletRet = FtpletEnum.RET_DISCONNECT;
}
if(ftpletRet == FtpletEnum.RET_DISCONNECT) {