    001/*
    002 * Licensed to the Apache Software Foundation (ASF) under one or more
    003 * contributor license agreements.  See the NOTICE file distributed with
    004 * this work for additional information regarding copyright ownership.
    005 * The ASF licenses this file to You under the Apache License, Version 2.0
    006 * (the "License"); you may not use this file except in compliance with
    007 * the License.  You may obtain a copy of the License at
    008 *
    009 *      http://www.apache.org/licenses/LICENSE-2.0
    010 *
    011 * Unless required by applicable law or agreed to in writing, software
    012 * distributed under the License is distributed on an "AS IS" BASIS,
    013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    014 * See the License for the specific language governing permissions and
    015 * limitations under the License.
    016 */
    017
    018package org.apache.commons.net.ftp.parser;
    019
    020import java.text.ParseException;
    021
    022import org.apache.commons.net.ftp.FTPClientConfig;
    023import org.apache.commons.net.ftp.FTPFile;
    024
    025/**
    026 * Implementation of FTPFileEntryParser and FTPFileListParser for Netware Systems. Note that some proprietary extensions for Novell-specific operations
    027 * are not supported. See <a href="http://www.novell.com/documentation/nw65/index.html?page=/documentation/nw65/ftp_enu/data/fbhbgcfa.html">
    028 * http://www.novell.com/documentation/nw65/index.html?page=/documentation/nw65/ftp_enu/data/fbhbgcfa.html</a> for more details.
    029 *
    030 * @see org.apache.commons.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions)
    031 * @since 1.5
    032 */
    033public class NetwareFTPEntryParser extends ConfigurableFTPFileEntryParserImpl {
    034
    035    /**
    036     * Default date format is e.g. Feb 22 2006
    037     */
    038    private static final String DEFAULT_DATE_FORMAT = "MMM dd yyyy";
    039
    040    /**
    041     * Default recent date format is e.g. Feb 22 17:32
    042     */
    043    private static final String DEFAULT_RECENT_DATE_FORMAT = "MMM dd HH:mm";
    044
    045    /**
    046     * this is the regular expression used by this parser. Example: d [-W---F--] SCION_VOL2 512 Apr 13 23:12 VOL2
    047     */
    048    private static final String REGEX = "(d|-){1}\\s+" // Directory/file flag
    049            + "\\[([-A-Z]+)\\]\\s+" // Attributes RWCEAFMS or -
    050            + "(\\S+)\\s+" + "(\\d+)\\s+" // Owner and size
    051            + "(\\S+\\s+\\S+\\s+((\\d+:\\d+)|(\\d{4})))" // Long/short date format
    052            + "\\s+(.*)"; // Filename (incl. spaces)
    053
    054    /**
    055     * The default constructor for a NetwareFTPEntryParser object.
    056     *
    057     * @throws IllegalArgumentException Thrown if the regular expression is unparseable. Should not be seen under normal conditions. If it is seen, this is a
    058     *                                  sign that <code>REGEX</code> is not a valid regular expression.
    059     */
    060    public NetwareFTPEntryParser() {
    061        this(null);
    062    }
    063
    064    /**
    065     * This constructor allows the creation of an NetwareFTPEntryParser object with something other than the default configuration.
    066     *
    067     * @param config The {@link FTPClientConfig configuration} object used to configure this parser.
    068     * @throws IllegalArgumentException Thrown if the regular expression is unparseable. Should not be seen under normal conditions. If it is seen, this is a
    069     *                                  sign that <code>REGEX</code> is not a valid regular expression.
    070     * @since 1.4
    071     */
    072    public NetwareFTPEntryParser(final FTPClientConfig config) {
    073        super(REGEX);
    074        configure(config);
    075    }
    076
    077    /**
    078     * Defines a default configuration to be used when this class is instantiated without a {@link FTPClientConfig FTPClientConfig} parameter being specified.
    079     *
    080     * @return the default configuration for this parser.
    081     */
    082    @Override
    083    protected FTPClientConfig getDefaultConfiguration() {
    084        return new FTPClientConfig(FTPClientConfig.SYST_NETWARE, DEFAULT_DATE_FORMAT, DEFAULT_RECENT_DATE_FORMAT);
    085    }
    086
    087    /**
    088     * Parses a line of an NetwareFTP server file listing and converts it into a usable format in the form of an <code> FTPFile </code> instance. If the file
    089     * listing line doesn't describe a file, <code> null </code> is returned, otherwise a <code> FTPFile </code> instance representing the files in the
    090     * directory is returned.
    091     * <p>
    092     * Netware file permissions are in the following format: RWCEAFMS, and are explained as follows:
    093     * <ul>
    094     * <li><b>S</b> - Supervisor; All rights.
    095     * <li><b>R</b> - Read; Right to open and read or execute.
    096     * <li><b>W</b> - Write; Right to open and modify.
    097     * <li><b>C</b> - Create; Right to create; when assigned to a file, allows a deleted file to be recovered.
    098     * <li><b>E</b> - Erase; Right to delete.
    099     * <li><b>M</b> - Modify; Right to rename a file and to change attributes.
    100     * <li><b>F</b> - File Scan; Right to see directory or file listings.
    101     * <li><b>A</b> - Access Control; Right to modify trustee assignments and the Inherited Rights Mask.
    102     * </ul>
    103     *
    104     * See <a href="http://www.novell.com/documentation/nfap10/index.html?page=/documentation/nfap10/nfaubook/data/abxraws.html"> here</a> for more details
    105     *
    106     * @param entry A line of text from the file listing
    107     * @return An FTPFile instance corresponding to the supplied entry
    108     */
    109    @Override
    110    public FTPFile parseFTPEntry(final String entry) {
    111
    112        final FTPFile f = new FTPFile();
    113        if (matches(entry)) {
    114            final String dirString = group(1);
    115            final String attrib = group(2);
    116            final String user = group(3);
    117            final String size = group(4);
    118            final String datestr = group(5);
    119            final String name = group(9);
    120
    121            try {
    122                f.setTimestamp(super.parseTimestamp(datestr));
    123            } catch (final ParseException e) {
    124                // intentionally do nothing
    125            }
    126
    127            // is it a DIR or a file
    128            if (dirString.trim().equals("d")) {
    129                f.setType(FTPFile.DIRECTORY_TYPE);
    130            } else // Should be "-"
    131            {
    132                f.setType(FTPFile.FILE_TYPE);
    133            }
    134
    135            f.setUser(user);
    136
    137            // set the name
    138            f.setName(name.trim());
    139
    140            // set the size
    141            f.setSize(Long.parseLong(size.trim()));
    142
    143            // Now set the permissions (or at least a subset thereof - full permissions would probably require
    144            // subclassing FTPFile and adding extra metainformation there)
    145            if (attrib.indexOf('R') != -1) {
    146                f.setPermission(FTPFile.USER_ACCESS, FTPFile.READ_PERMISSION, true);
    147            }
    148            if (attrib.indexOf('W') != -1) {
    149                f.setPermission(FTPFile.USER_ACCESS, FTPFile.WRITE_PERMISSION, true);
    150            }
    151
    152            return f;
    153        }
    154        return null;
    155
    156    }
    157
    158}