1/* 2 * Copyright 2008 the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16package org.mockftpserver.fake.command; 17 18import org.mockftpserver.core.command.Command; 19import org.mockftpserver.core.command.ReplyCodes; 20import org.mockftpserver.core.session.Session; 21import org.mockftpserver.core.util.StringUtil; 22 23import java.util.List; 24 25/** 26 * CommandHandler for the NLST command. Handler logic: 27 * <ol> 28 * <li>If the user has not logged in, then reply with 530 and terminate</li> 29 * <li>Send an initial reply of 150</li> 30 * <li>If the current user does not have read access to the file or directory to be listed, then reply with 550 and terminate</li> 31 * <li>If an error occurs during processing, then send a reply of 451 and terminate</li> 32 * <li>If the optional pathname parameter is missing, then send a directory listing for 33 * the current directory across the data connection</li> 34 * <li>Otherwise, if the optional pathname parameter specifies a directory or group of files, 35 * then send a directory listing for the specified directory across the data connection</li> 36 * <li>Otherwise, if the pathname parameter does not specify an existing directory or group of files, 37 * then send an empty response across the data connection</li> 38 * <li>Send a final reply with 226</li> 39 * </ol> 40 * The directory listing sent includes filenames only, separated by end-of-line characters. 41 * 42 * @author Chris Mair 43 * @version $Revision$ - $Date$ 44 */ 45public class NlstCommandHandler extends AbstractFakeCommandHandler { 46 47 protected void handle(Command command, Session session) { 48 verifyLoggedIn(session); 49 sendReply(session, ReplyCodes.TRANSFER_DATA_INITIAL_OK); 50 String path = getRealPath(session, command.getParameter(0)); 51 52 // User must have read permission to the path 53 if (getFileSystem().exists(path)) { 54 this.replyCodeForFileSystemException = ReplyCodes.READ_FILE_ERROR; 55 verifyReadPermission(session, path); 56 } 57 58 this.replyCodeForFileSystemException = ReplyCodes.SYSTEM_ERROR; 59 List names = getFileSystem().listNames(path); 60 String directoryListing = StringUtil.join(names, endOfLine()); 61 directoryListing += directoryListing.length() > 0 ? endOfLine() : ""; 62 63 session.openDataConnection(); 64 session.sendData(directoryListing.getBytes(), directoryListing.length()); 65 session.closeDataConnection(); 66 67 sendReply(session, ReplyCodes.TRANSFER_DATA_FINAL_OK); 68 } 69 70}