/*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*/
package org.apache.ftpserver.command;
import java.io.IOException;
import java.io.OutputStream;
import java.net.InetAddress;
import java.net.SocketException;
import org.apache.ftpserver.DefaultFtpReply;
import org.apache.ftpserver.IODataConnectionFactory;
import org.apache.ftpserver.ftplet.DataConnection;
import org.apache.ftpserver.ftplet.DataConnectionFactory;
import org.apache.ftpserver.ftplet.FileObject;
import org.apache.ftpserver.ftplet.FtpException;
import org.apache.ftpserver.ftplet.FtpReply;
import org.apache.ftpserver.ftplet.FtpRequest;
import org.apache.ftpserver.ftplet.Ftplet;
import org.apache.ftpserver.ftplet.FtpletEnum;
import org.apache.ftpserver.interfaces.FtpIoSession;
import org.apache.ftpserver.interfaces.FtpServerContext;
import org.apache.ftpserver.interfaces.ServerFtpStatistics;
import org.apache.ftpserver.util.FtpReplyUtil;
import org.apache.ftpserver.util.IoUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* <code>APPE <SP> <pathname> <CRLF></code><br>
*
* This command causes the server-DTP to accept the data
* transferred via the data connection and to store the data in
* a file at the server site. If the file specified in the
* pathname exists at the server site, then the data shall be
* appended to that file; otherwise the file specified in the
* pathname shall be created at the server site.
*/
public
class APPE extends AbstractCommand {
private final Logger LOG = LoggerFactory.getLogger(APPE.class);
/**
* Execute command.
*/
public void execute(final FtpIoSession session,
final FtpServerContext context,
final FtpRequest request) throws IOException, FtpException {
try {
// reset state variables
session.resetState();
// argument check
String fileName = request.getArgument();
if(fileName == null) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, "APPE", null));
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;
}
}
// call Ftplet.onAppendStart() method
Ftplet ftpletContainer = context.getFtpletContainer();
FtpletEnum ftpletRet;
try {
ftpletRet = ftpletContainer.onAppendStart(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 filenames
FileObject file = null;
try {
file = session.getFileSystemView().getFileObject(fileName);
}
catch(Exception e) {
LOG.debug("File system threw exception", e);
}
if(file == null) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "APPE.invalid", fileName));
return;
}
fileName = file.getFullName();
// check file existance
if(file.doesExist() && !file.isFile()) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "APPE.invalid", fileName));
return;
}
// check permission
if( !file.hasWritePermission()) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_550_REQUESTED_ACTION_NOT_TAKEN, "APPE.permission", fileName));
return;
}
// get data connection
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_150_FILE_STATUS_OKAY, "APPE", fileName));
DataConnection dataConnection;
try {
dataConnection = session.getDataConnection().openConnection();
} catch (Exception e) {
LOG.debug("Exception when getting data input stream", e);
session.write(FtpReplyUtil.translate(session,request, context, FtpReply.REPLY_425_CANT_OPEN_DATA_CONNECTION, "APPE", fileName));
return;
}
// get data from client
boolean failure = false;
OutputStream os = null;
try {
// find offset
long offset = 0L;
if(file.doesExist()) {
offset = file.getSize();
}
// open streams
os = file.createOutputStream(offset);
// transfer data
long transSz = dataConnection.transferFromClient(os);
// log message
String userName = session.getUser().getName();
LOG.info("File upload : " + userName + " - " + fileName);
// notify the statistics component
ServerFtpStatistics ftpStat = (ServerFtpStatistics)context.getFtpStatistics();
ftpStat.setUpload(session, file, transSz);
}
catch(SocketException e) {
LOG.debug("SocketException during file upload", e);
failure = true;
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_426_CONNECTION_CLOSED_TRANSFER_ABORTED, "APPE", fileName));
}
catch(IOException e) {
LOG.debug("IOException during file upload", e);
failure = true;
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_551_REQUESTED_ACTION_ABORTED_PAGE_TYPE_UNKNOWN, "APPE", fileName));
}
finally {
IoUtils.close(os);
}
// if data transfer ok - send transfer complete message
if(!failure) {
session.write(FtpReplyUtil.translate(session, request, context, FtpReply.REPLY_226_CLOSING_DATA_CONNECTION, "APPE", fileName));
// call Ftplet.onAppendEnd() method
try {
ftpletRet = ftpletContainer.onAppendEnd(session.getFtpletSession(), request);
} catch(Exception e) {
LOG.debug("Ftplet container threw exception", e);
ftpletRet = FtpletEnum.RET_DISCONNECT;
}
if(ftpletRet == FtpletEnum.RET_DISCONNECT) {
session.closeOnFlush().awaitUninterruptibly(10000);
return;
}
}
}
finally {
session.getDataConnection().closeDataConnection();
}
}
}