| /* |
| * 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.impl; |
| |
| import java.io.IOException; |
| import java.net.InetAddress; |
| import java.net.SocketException; |
| |
| import org.apache.ftpserver.command.AbstractCommand; |
| import org.apache.ftpserver.command.impl.listing.DirectoryLister; |
| import org.apache.ftpserver.command.impl.listing.FileFormater; |
| import org.apache.ftpserver.command.impl.listing.LISTFileFormater; |
| import org.apache.ftpserver.command.impl.listing.ListArgument; |
| import org.apache.ftpserver.command.impl.listing.ListArgumentParser; |
| import org.apache.ftpserver.command.impl.listing.NLSTFileFormater; |
| import org.apache.ftpserver.ftplet.DataConnection; |
| import org.apache.ftpserver.ftplet.DataConnectionFactory; |
| import org.apache.ftpserver.ftplet.DefaultFtpReply; |
| import org.apache.ftpserver.ftplet.FtpException; |
| import org.apache.ftpserver.ftplet.FtpReply; |
| import org.apache.ftpserver.ftplet.FtpRequest; |
| import org.apache.ftpserver.impl.FtpIoSession; |
| import org.apache.ftpserver.impl.FtpServerContext; |
| import org.apache.ftpserver.impl.IODataConnectionFactory; |
| import org.apache.ftpserver.impl.LocalizedFtpReply; |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| /** |
| * <strong>Internal class, do not use directly.</strong> |
| * |
| * <code>NLST [<SP> <pathname>] <CRLF></code><br> |
| * |
| * This command causes a directory listing to be sent from server to user site. |
| * The pathname should specify a directory or other system-specific file group |
| * descriptor; a null argument implies the current directory. The server will |
| * return a stream of names of files and no other information. |
| * |
| * @author <a href="http://mina.apache.org">Apache MINA Project</a> |
| */ |
| public class NLST extends AbstractCommand { |
| |
| private final Logger LOG = LoggerFactory.getLogger(NLST.class); |
| |
| private static final NLSTFileFormater NLST_FILE_FORMATER = new NLSTFileFormater(); |
| |
| private static final LISTFileFormater LIST_FILE_FORMATER = new LISTFileFormater(); |
| |
| private final DirectoryLister directoryLister = new DirectoryLister(); |
| |
| /** |
| * Execute command |
| */ |
| public void execute(final FtpIoSession session, |
| final FtpServerContext context, final FtpRequest request) |
| throws IOException, FtpException { |
| |
| try { |
| |
| // reset state |
| session.resetState(); |
| |
| // 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(LocalizedFtpReply.translate(session, request, context, |
| FtpReply.REPLY_150_FILE_STATUS_OKAY, "NLST", null)); |
| |
| // print listing data |
| DataConnection dataConnection; |
| try { |
| dataConnection = session.getDataConnection().openConnection(); |
| } catch (Exception e) { |
| LOG.debug("Exception getting the output data stream", e); |
| session.write(LocalizedFtpReply.translate(session, request, context, |
| FtpReply.REPLY_425_CANT_OPEN_DATA_CONNECTION, "NLST", |
| null)); |
| return; |
| } |
| |
| boolean failure = false; |
| try { |
| // parse argument |
| ListArgument parsedArg = ListArgumentParser.parse(request |
| .getArgument()); |
| |
| FileFormater formater; |
| if (parsedArg.hasOption('l')) { |
| formater = LIST_FILE_FORMATER; |
| } else { |
| formater = NLST_FILE_FORMATER; |
| } |
| |
| dataConnection.transferToClient(session.getFtpletSession(), directoryLister.listFiles( |
| parsedArg, session.getFileSystemView(), formater)); |
| } catch (SocketException ex) { |
| LOG.debug("Socket exception during data transfer", ex); |
| failure = true; |
| session.write(LocalizedFtpReply.translate(session, request, context, |
| FtpReply.REPLY_426_CONNECTION_CLOSED_TRANSFER_ABORTED, |
| "NLST", null)); |
| } catch (IOException ex) { |
| LOG.debug("IOException during data transfer", ex); |
| failure = true; |
| session |
| .write(LocalizedFtpReply |
| .translate( |
| session, |
| request, |
| context, |
| FtpReply.REPLY_551_REQUESTED_ACTION_ABORTED_PAGE_TYPE_UNKNOWN, |
| "NLST", null)); |
| } catch (IllegalArgumentException e) { |
| LOG |
| .debug("Illegal listing syntax: " |
| + request.getArgument(), e); |
| // if listing syntax error - send message |
| session |
| .write(LocalizedFtpReply |
| .translate( |
| session, |
| request, |
| context, |
| FtpReply.REPLY_501_SYNTAX_ERROR_IN_PARAMETERS_OR_ARGUMENTS, |
| "LIST", null)); |
| } |
| |
| // if data transfer ok - send transfer complete message |
| if (!failure) { |
| session.write(LocalizedFtpReply.translate(session, request, context, |
| FtpReply.REPLY_226_CLOSING_DATA_CONNECTION, "NLST", |
| null)); |
| } |
| } finally { |
| session.getDataConnection().closeDataConnection(); |
| } |
| } |
| } |