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-/*
- * 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.commons.net.ftp.parser;
-import java.text.ParseException;
-
-import org.apache.commons.net.ftp.FTPClientConfig;
-import org.apache.commons.net.ftp.FTPFile;
-
-/**
- * Implementation FTPFileEntryParser and FTPFileListParser for standard
- * Unix Systems.
- *
- * This class is based on the logic of Daniel Savarese's
- * DefaultFTPListParser, but adapted to use regular expressions and to fit the
- * new FTPFileEntryParser interface.
- * @version $Id: UnixFTPEntryParser.java 658518 2008-05-21 01:04:30Z sebb $
- * @see org.apache.commons.net.ftp.FTPFileEntryParser FTPFileEntryParser (for usage instructions)
- */
-public class UnixFTPEntryParser extends ConfigurableFTPFileEntryParserImpl
-{
-
- static final String DEFAULT_DATE_FORMAT
- = "MMM d yyyy"; //Nov 9 2001
-
- static final String DEFAULT_RECENT_DATE_FORMAT
- = "MMM d HH:mm"; //Nov 9 20:06
-
- static final String NUMERIC_DATE_FORMAT
- = "yyyy-MM-dd HH:mm"; //2001-11-09 20:06
-
- /**
- * Some Linux distributions are now shipping an FTP server which formats
- * file listing dates in an all-numeric format:
- * <code>"yyyy-MM-dd HH:mm</code>.
- * This is a very welcome development, and hopefully it will soon become
- * the standard. However, since it is so new, for now, and possibly
- * forever, we merely accomodate it, but do not make it the default.
- * <p>
- * For now end users may specify this format only via
- * <code>UnixFTPEntryParser(FTPClientConfig)</code>.
- * Steve Cohen - 2005-04-17
- */
- public static final FTPClientConfig NUMERIC_DATE_CONFIG =
- new FTPClientConfig(
- FTPClientConfig.SYST_UNIX,
- NUMERIC_DATE_FORMAT,
- null, null, null, null);
-
- /**
- * this is the regular expression used by this parser.
- *
- * Permissions:
- * r the file is readable
- * w the file is writable
- * x the file is executable
- * - the indicated permission is not granted
- * L mandatory locking occurs during access (the set-group-ID bit is
- * on and the group execution bit is off)
- * s the set-user-ID or set-group-ID bit is on, and the corresponding
- * user or group execution bit is also on
- * S undefined bit-state (the set-user-ID bit is on and the user
- * execution bit is off)
- * t the 1000 (octal) bit, or sticky bit, is on [see chmod(1)], and
- * execution is on
- * T the 1000 bit is turned on, and execution is off (undefined bit-
- * state)
- * e z/OS external link bit
- */
- private static final String REGEX =
- "([bcdelfmpSs-])"
- +"(((r|-)(w|-)([xsStTL-]))((r|-)(w|-)([xsStTL-]))((r|-)(w|-)([xsStTL-])))\\+?\\s+"
- + "(\\d+)\\s+"
- + "(?:(\\S+(?:\\s\\S+)*?)\\s+)?" // owner name (optional spaces)
- + "(?:(\\S+(?:\\s\\S+)*)\\s+)?" // group name (optional spaces)
- + "(\\d+(?:,\\s*\\d+)?)\\s+"
-
- /*
- numeric or standard format date
- */
- + "((?:\\d+[-/]\\d+[-/]\\d+)|(?:\\S+\\s+\\S+))\\s+"
-
- /*
- year (for non-recent standard format)
- or time (for numeric or recent standard format
- */
- + "(\\d+(?::\\d+)?)\\s+"
-
- + "(\\S*)(\\s*.*)";
-
-
- /**
- * The default constructor for a UnixFTPEntryParser object.
- *
- * @exception IllegalArgumentException
- * Thrown if the regular expression is unparseable. Should not be seen
- * under normal conditions. It it is seen, this is a sign that
- * <code>REGEX</code> is not a valid regular expression.
- */
- public UnixFTPEntryParser()
- {
- this(null);
- }
-
- /**
- * This constructor allows the creation of a UnixFTPEntryParser object with
- * something other than the default configuration.
- *
- * @param config The {@link FTPClientConfig configuration} object used to
- * configure this parser.
- * @exception IllegalArgumentException
- * Thrown if the regular expression is unparseable. Should not be seen
- * under normal conditions. It it is seen, this is a sign that
- * <code>REGEX</code> is not a valid regular expression.
- * @since 1.4
- */
- public UnixFTPEntryParser(FTPClientConfig config)
- {
- super(REGEX);
- configure(config);
- }
-
-
- /**
- * Parses a line of a unix (standard) FTP server file listing and converts
- * it into a usable format in the form of an <code> FTPFile </code>
- * instance. If the file listing line doesn't describe a file,
- * <code> null </code> is returned, otherwise a <code> FTPFile </code>
- * instance representing the files in the directory is returned.
- * <p>
- * @param entry A line of text from the file listing
- * @return An FTPFile instance corresponding to the supplied entry
- */
- public FTPFile parseFTPEntry(String entry) {
- FTPFile file = new FTPFile();
- file.setRawListing(entry);
- int type;
- boolean isDevice = false;
-
- if (matches(entry))
- {
- String typeStr = group(1);
- String hardLinkCount = group(15);
- String usr = group(16);
- String grp = group(17);
- String filesize = group(18);
- String datestr = group(19) + " " + group(20);
- String name = group(21);
- String endtoken = group(22);
-
- try
- {
- file.setTimestamp(super.parseTimestamp(datestr));
- }
- catch (ParseException e)
- {
- // intentionally do nothing
- }
-
-
- // bcdlfmpSs-
- switch (typeStr.charAt(0))
- {
- case 'd':
- type = FTPFile.DIRECTORY_TYPE;
- break;
- case 'e':
- type = FTPFile.SYMBOLIC_LINK_TYPE;
- break;
- case 'l':
- type = FTPFile.SYMBOLIC_LINK_TYPE;
- break;
- case 'b':
- case 'c':
- isDevice = true;
- // break; - fall through
- case 'f':
- case '-':
- type = FTPFile.FILE_TYPE;
- break;
- default:
- type = FTPFile.UNKNOWN_TYPE;
- }
-
- file.setType(type);
-
- int g = 4;
- for (int access = 0; access < 3; access++, g += 4)
- {
- // Use != '-' to avoid having to check for suid and sticky bits
- file.setPermission(access, FTPFile.READ_PERMISSION,
- (!group(g).equals("-")));
- file.setPermission(access, FTPFile.WRITE_PERMISSION,
- (!group(g + 1).equals("-")));
-
- String execPerm = group(g + 2);
- if (!execPerm.equals("-") && !Character.isUpperCase(execPerm.charAt(0)))
- {
- file.setPermission(access, FTPFile.EXECUTE_PERMISSION, true);
- }
- else
- {
- file.setPermission(access, FTPFile.EXECUTE_PERMISSION, false);
- }
- }
-
- if (!isDevice)
- {
- try
- {
- file.setHardLinkCount(Integer.parseInt(hardLinkCount));
- }
- catch (NumberFormatException e)
- {
- // intentionally do nothing
- }
- }
-
- file.setUser(usr);
- file.setGroup(grp);
-
- try
- {
- file.setSize(Long.parseLong(filesize));
- }
- catch (NumberFormatException e)
- {
- // intentionally do nothing
- }
-
- if (null == endtoken)
- {
- file.setName(name);
- }
- else
- {
- // oddball cases like symbolic links, file names
- // with spaces in them.
- name += endtoken;
- if (type == FTPFile.SYMBOLIC_LINK_TYPE)
- {
-
- int end = name.indexOf(" -> ");
- // Give up if no link indicator is present
- if (end == -1)
- {
- file.setName(name);
- }
- else
- {
- file.setName(name.substring(0, end));
- file.setLink(name.substring(end + 4));
- }
-
- }
- else
- {
- file.setName(name);
- }
- }
- return file;
- }
- return null;
- }
-
- /**
- * Defines a default configuration to be used when this class is
- * instantiated without a {@link FTPClientConfig FTPClientConfig}
- * parameter being specified.
- * @return the default configuration for this parser.
- */
- @Override
- protected FTPClientConfig getDefaultConfiguration() {
- return new FTPClientConfig(
- FTPClientConfig.SYST_UNIX,
- DEFAULT_DATE_FORMAT,
- DEFAULT_RECENT_DATE_FORMAT,
- null, null, null);
- }
-
-}