From 01c75a7aa09d0d9fd7a4c61f952aaa93972e7c99 Mon Sep 17 00:00:00 2001 From: Joe Robinson Date: Wed, 27 Oct 2010 21:31:44 +0100 Subject: Reset eclipse workspace (commit hopefully changes nothing) --- .../apache/commons/net/ftp/FTPClientConfig.java | 580 +++++++++++++++++++++ 1 file changed, 580 insertions(+) create mode 100644 src/org/apache/commons/net/ftp/FTPClientConfig.java (limited to 'src/org/apache/commons/net/ftp/FTPClientConfig.java') diff --git a/src/org/apache/commons/net/ftp/FTPClientConfig.java b/src/org/apache/commons/net/ftp/FTPClientConfig.java new file mode 100644 index 0000000..450eddc --- /dev/null +++ b/src/org/apache/commons/net/ftp/FTPClientConfig.java @@ -0,0 +1,580 @@ +/* + * 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; + +import java.text.DateFormatSymbols; +import java.util.Collection; +import java.util.Locale; +import java.util.Map; +import java.util.StringTokenizer; +import java.util.TreeMap; + +/** + *

+ * This class implements an alternate means of configuring the + * {@link org.apache.commons.net.ftp.FTPClient FTPClient} object and + * also subordinate objects which it uses. Any class implementing the + * {@link org.apache.commons.net.ftp.Configurable Configurable } + * interface can be configured by this object. + *

+ * In particular this class was designed primarily to support configuration + * of FTP servers which express file timestamps in formats and languages + * other than those for the US locale, which although it is the most common + * is not universal. Unfortunately, nothing in the FTP spec allows this to + * be determined in an automated way, so manual configuration such as this + * is necessary. + *

+ * This functionality was designed to allow existing clients to work exactly + * as before without requiring use of this component. This component should + * only need to be explicitly invoked by the user of this package for problem + * cases that previous implementations could not solve. + *

+ *

Examples of use of FTPClientConfig

+ * Use cases: + * You are trying to access a server that + * + *

+ * Unpaged (whole list) access on a UNIX server that uses French month names + * but uses the "standard" MMM d yyyy date formatting + * 

+ *    FTPClient f=FTPClient();
+ *    FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
+ *    conf.setServerLanguageCode("fr");
+ *    f.configure(conf);
+ *    f.connect(server);
+ *    f.login(username, password);
+ *    FTPFile[] files = listFiles(directory);
+ *
+ *

+ *

+ * Paged access on a UNIX server that uses Danish month names + * and "European" date formatting in Denmark's time zone, when you + * are in some other time zone. + * 

+ *    FTPClient f=FTPClient();
+ *    FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
+ *    conf.setServerLanguageCode("da");
+ *    conf.setDefaultDateFormat("d MMM yyyy");
+ *    conf.setRecentDateFormat("d MMM HH:mm");
+ *    conf.setTimeZoneId("Europe/Copenhagen");
+ *    f.configure(conf);
+ *    f.connect(server);
+ *    f.login(username, password);
+ *    FTPListParseEngine engine =
+ *       f.initiateListParsing("com.whatever.YourOwnParser", directory);
+ *
+ *    while (engine.hasNext()) {
+ *       FTPFile[] files = engine.getNext(25);  // "page size" you want
+ *       //do whatever you want with these files, display them, etc.
+ *       //expensive FTPFile objects not created until needed.
+ *    }
+ *
+ *

+ *

+ * Unpaged (whole list) access on a VMS server that uses month names + * in a language not {@link #getSupportedLanguageCodes() supported} by the system. + * but uses the "standard" MMM d yyyy date formatting + * 

+ *    FTPClient f=FTPClient();
+ *    FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_VMS);
+ *    conf.setShortMonthNames(
+ *        "jan|feb|mar|apr|ma\u00ED|j\u00FAn|j\u00FAl|\u00e1g\u00FA|sep|okt|n\u00F3v|des");
+ *    f.configure(conf);
+ *    f.connect(server);
+ *    f.login(username, password);
+ *    FTPFile[] files = listFiles(directory);
+ *
+ *

+ *

+ * Unpaged (whole list) access on a Windows-NT server in a different time zone. + * (Note, since the NT Format uses numeric date formatting, language issues + * are irrelevant here). + * 

+ *    FTPClient f=FTPClient();
+ *    FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_NT);
+ *    conf.setTimeZoneId("America/Denver");
+ *    f.configure(conf);
+ *    f.connect(server);
+ *    f.login(username, password);
+ *    FTPFile[] files = listFiles(directory);
+ *
+ *

+ * Unpaged (whole list) access on a Windows-NT server in a different time zone + * but which has been configured to use a unix-style listing format. + * 
+ *    FTPClient f=FTPClient();
+ *    FTPClientConfig conf = new FTPClientConfig(FTPClientConfig.SYST_UNIX);
+ *    conf.setTimeZoneId("America/Denver");
+ *    f.configure(conf);
+ *    f.connect(server);
+ *    f.login(username, password);
+ *    FTPFile[] files = listFiles(directory);
+ *
+ *

+ * @since 1.4 + * @see org.apache.commons.net.ftp.Configurable + * @see org.apache.commons.net.ftp.FTPClient + * @see org.apache.commons.net.ftp.parser.FTPTimestampParserImpl#configure(FTPClientConfig) + * @see org.apache.commons.net.ftp.parser.ConfigurableFTPFileEntryParserImpl + */ +public class FTPClientConfig +{ + + /** + * Identifier by which a unix-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_UNIX = "UNIX"; + + /** + * Identifier by which a vms-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_VMS = "VMS"; + + /** + * Identifier by which a WindowsNT-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_NT = "WINDOWS"; + + /** + * Identifier by which an OS/2-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_OS2 = "OS/2"; + + /** + * Identifier by which an OS/400-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_OS400 = "OS/400"; + + /** + * Identifier by which an AS/400-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_AS400 = "AS/400"; + + /** + * Identifier by which an MVS-based ftp server is known throughout + * the commons-net ftp system. + */ + public static final String SYST_MVS = "MVS"; + + /** + * Some servers return an "UNKNOWN Type: L8" message + * in response to the SYST command. We set these to be a Unix-type system. + * This may happen if the ftpd in question was compiled without system + * information. + * + * NET-230 - Updated to be UPPERCASE so that the check done in + * createFileEntryParser will succeed. + * + * @since 1.5 + */ + public static final String SYST_L8 = "TYPE: L8"; + + /** + * Identifier by which an Netware-based ftp server is known throughout + * the commons-net ftp system. + * + * @since 1.5 + */ + public static final String SYST_NETWARE = "NETWARE"; + + private final String serverSystemKey; + private String defaultDateFormatStr = null; + private String recentDateFormatStr = null; + private boolean lenientFutureDates = false; + private String serverLanguageCode = null; + private String shortMonthNames = null; + private String serverTimeZoneId = null; + + + /** + * The main constructor for an FTPClientConfig object + * @param systemKey key representing system type of the server being + * connected to. See {@link #getServerSystemKey() serverSystemKey} + */ + public FTPClientConfig(String systemKey) { + this.serverSystemKey = systemKey; + } + + /** + * Convenience constructor mainly for use in testing. + * Constructs a UNIX configuration. + */ + public FTPClientConfig() { + this(SYST_UNIX); + } + + /** + * Constructor which allows setting of all member fields + * @param systemKey key representing system type of the server being + * connected to. See + * {@link #getServerSystemKey() serverSystemKey} + * @param defaultDateFormatStr See + * {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} + * @param recentDateFormatStr See + * {@link #setRecentDateFormatStr(String) recentDateFormatStr} + * @param serverLanguageCode See + * {@link #setServerLanguageCode(String) serverLanguageCode} + * @param shortMonthNames See + * {@link #setShortMonthNames(String) shortMonthNames} + * @param serverTimeZoneId See + * {@link #setServerTimeZoneId(String) serverTimeZoneId} + */ + public FTPClientConfig(String systemKey, + String defaultDateFormatStr, + String recentDateFormatStr, + String serverLanguageCode, + String shortMonthNames, + String serverTimeZoneId) + { + this(systemKey); + this.defaultDateFormatStr = defaultDateFormatStr; + this.recentDateFormatStr = recentDateFormatStr; + this.serverLanguageCode = serverLanguageCode; + this.shortMonthNames = shortMonthNames; + this.serverTimeZoneId = serverTimeZoneId; + } + + private static Map LANGUAGE_CODE_MAP = new TreeMap(); + static { + + // if there are other commonly used month name encodings which + // correspond to particular locales, please add them here. + + + + // many locales code short names for months as all three letters + // these we handle simply. + LANGUAGE_CODE_MAP.put("en", Locale.ENGLISH); + LANGUAGE_CODE_MAP.put("de",Locale.GERMAN); + LANGUAGE_CODE_MAP.put("it",Locale.ITALIAN); + LANGUAGE_CODE_MAP.put("es", new Locale("es", "", "")); // spanish + LANGUAGE_CODE_MAP.put("pt", new Locale("pt", "", "")); // portuguese + LANGUAGE_CODE_MAP.put("da", new Locale("da", "", "")); // danish + LANGUAGE_CODE_MAP.put("sv", new Locale("sv", "", "")); // swedish + LANGUAGE_CODE_MAP.put("no", new Locale("no", "", "")); // norwegian + LANGUAGE_CODE_MAP.put("nl", new Locale("nl", "", "")); // dutch + LANGUAGE_CODE_MAP.put("ro", new Locale("ro", "", "")); // romanian + LANGUAGE_CODE_MAP.put("sq", new Locale("sq", "", "")); // albanian + LANGUAGE_CODE_MAP.put("sh", new Locale("sh", "", "")); // serbo-croatian + LANGUAGE_CODE_MAP.put("sk", new Locale("sk", "", "")); // slovak + LANGUAGE_CODE_MAP.put("sl", new Locale("sl", "", "")); // slovenian + + + // some don't + LANGUAGE_CODE_MAP.put("fr", + "jan|f\u00e9v|mar|avr|mai|jun|jui|ao\u00fb|sep|oct|nov|d\u00e9c"); //french + + } + + /** + * Getter for the serverSystemKey property. This property + * specifies the general type of server to which the client connects. + * Should be either one of the FTPClientConfig.SYST_* codes + * or else the fully qualified class name of a parser implementing both + * the FTPFileEntryParser and Configurable + * interfaces. + * @return Returns the serverSystemKey property. + */ + public String getServerSystemKey() { + return serverSystemKey; + } + + /** + * getter for the {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} + * property. + * @return Returns the defaultDateFormatStr property. + */ + public String getDefaultDateFormatStr() { + return defaultDateFormatStr; + } + + /** + * getter for the {@link #setRecentDateFormatStr(String) recentDateFormatStr} property. + * @return Returns the recentDateFormatStr property. + */ + + public String getRecentDateFormatStr() { + return recentDateFormatStr; + } + + /** + * getter for the {@link #setServerTimeZoneId(String) serverTimeZoneId} property. + * @return Returns the serverTimeZoneId property. + */ + public String getServerTimeZoneId() { + return serverTimeZoneId; + } + + /** + *

+ * getter for the {@link #setShortMonthNames(String) shortMonthNames} + * property. + *

+ * @return Returns the shortMonthNames. + */ + public String getShortMonthNames() { + return shortMonthNames; + } + + /** + *

+ * getter for the {@link #setServerLanguageCode(String) serverLanguageCode} property. + *

+ * @return Returns the serverLanguageCode property. + */ + public String getServerLanguageCode() { + return serverLanguageCode; + } + + /** + *

+ * getter for the {@link #setLenientFutureDates(boolean) lenientFutureDates} property. + *

+ * @return Returns the lenientFutureDates. + * @since 1.5 + */ + public boolean isLenientFutureDates() { + return lenientFutureDates; + } + /** + *

+ * setter for the defaultDateFormatStr property. This property + * specifies the main date format that will be used by a parser configured + * by this configuration to parse file timestamps. If this is not + * specified, such a parser will use as a default value, the most commonly + * used format which will be in as used in en_US locales. + *

+ * This should be in the format described for + * java.text.SimpleDateFormat. + * property. + *

+ * @param defaultDateFormatStr The defaultDateFormatStr to set. + */ + public void setDefaultDateFormatStr(String defaultDateFormatStr) { + this.defaultDateFormatStr = defaultDateFormatStr; + } + + /** + *

+ * setter for the recentDateFormatStr property. This property + * specifies a secondary date format that will be used by a parser + * configured by this configuration to parse file timestamps, typically + * those less than a year old. If this is not specified, such a parser + * will not attempt to parse using an alternate format. + *

+ * This is used primarily in unix-based systems. + *

+ * This should be in the format described for + * java.text.SimpleDateFormat. + *

+ * @param recentDateFormatStr The recentDateFormatStr to set. + */ + public void setRecentDateFormatStr(String recentDateFormatStr) { + this.recentDateFormatStr = recentDateFormatStr; + } + + /** + *

+ * setter for the lenientFutureDates property. This boolean property + * (default: false) only has meaning when a + * {@link #setRecentDateFormatStr(String) recentDateFormatStr} property + * has been set. In that case, if this property is set true, then the + * parser, when it encounters a listing parseable with the recent date + * format, will only consider a date to belong to the previous year if + * it is more than one day in the future. This will allow all + * out-of-synch situations (whether based on "slop" - i.e. servers simply + * out of synch with one another or because of time zone differences - + * but in the latter case it is highly recommended to use the + * {@link #setServerTimeZoneId(String) serverTimeZoneId} property + * instead) to resolve correctly. + *

+ * This is used primarily in unix-based systems. + *

+ * @param lenientFutureDates set true to compensate for out-of-synch + * conditions. + */ + public void setLenientFutureDates(boolean lenientFutureDates) { + this.lenientFutureDates = lenientFutureDates; + } + /** + *

+ * setter for the serverTimeZoneId property. This property + * allows a time zone to be specified corresponding to that known to be + * used by an FTP server in file listings. This might be particularly + * useful to clients such as Ant that try to use these timestamps for + * dependency checking. + *

+ * This should be one of the identifiers used by + * java.util.TimeZone to refer to time zones, for example, + * America/Chicago or Asia/Rangoon. + *

+ * @param serverTimeZoneId The serverTimeZoneId to set. + */ + public void setServerTimeZoneId(String serverTimeZoneId) { + this.serverTimeZoneId = serverTimeZoneId; + } + + /** + *

+ * setter for the shortMonthNames property. + * This property allows the user to specify a set of month names + * used by the server that is different from those that may be + * specified using the {@link #setServerLanguageCode(String) serverLanguageCode} + * property. + *

+ * This should be a string containing twelve strings each composed of + * three characters, delimited by pipe (|) characters. Currently, + * only 8-bit ASCII characters are known to be supported. For example, + * a set of month names used by a hypothetical Icelandic FTP server might + * conceivably be specified as + * "jan|feb|mar|apr|maí|jún|júl|ágú|sep|okt|nóv|des". + *

+ * @param shortMonthNames The value to set to the shortMonthNames property. + */ + public void setShortMonthNames(String shortMonthNames) { + this.shortMonthNames = shortMonthNames; + } + + /** + *

+ * setter for the serverLanguageCode property. This property allows + * user to specify a + * + * two-letter ISO-639 language code that will be used to + * configure the set of month names used by the file timestamp parser. + * If neither this nor the {@link #setShortMonthNames(String) shortMonthNames} + * is specified, parsing will assume English month names, which may or + * may not be significant, depending on whether the date format(s) + * specified via {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} + * and/or {@link #setRecentDateFormatStr(String) recentDateFormatStr} are using + * numeric or alphabetic month names. + *

+ *

If the code supplied is not supported here, en_US + * month names will be used. We are supporting here those language + * codes which, when a java.util.Locale is constucted + * using it, and a java.text.SimpleDateFormat is + * constructed using that Locale, the array returned by the + * SimpleDateFormat's getShortMonths() method consists + * solely of three 8-bit ASCII character strings. Additionally, + * languages which do not meet this requirement are included if a + * common alternative set of short month names is known to be used. + * This means that users who can tell us of additional such encodings + * may get them added to the list of supported languages by contacting + * the jakarta-commons-net team. + *

+ *

+ * Please note that this attribute will NOT be used to determine a + * locale-based date format for the language. + * Experience has shown that many if not most FTP servers outside the + * United States employ the standard en_US date format + * orderings of MMM d yyyy and MMM d HH:mm + * and attempting to deduce this automatically here would cause more + * problems than it would solve. The date format must be changed + * via the {@link #setDefaultDateFormatStr(String) defaultDateFormatStr} and/or + * {@link #setRecentDateFormatStr(String) recentDateFormatStr} parameters. + *

+ * @param serverLanguageCode The value to set to the serverLanguageCode property. + */ + public void setServerLanguageCode(String serverLanguageCode) { + this.serverLanguageCode = serverLanguageCode; + } + + /** + * Looks up the supplied language code in the internally maintained table of + * language codes. Returns a DateFormatSymbols object configured with + * short month names corresponding to the code. If there is no corresponding + * entry in the table, the object returned will be that for + * Locale.US + * @param languageCode See {@link #setServerLanguageCode(String) serverLanguageCode} + * @return a DateFormatSymbols object configured with short month names + * corresponding to the supplied code, or with month names for + * Locale.US if there is no corresponding entry in the internal + * table. + */ + public static DateFormatSymbols lookupDateFormatSymbols(String languageCode) + { + Object lang = LANGUAGE_CODE_MAP.get(languageCode); + if (lang != null) { + if (lang instanceof Locale) { + return new DateFormatSymbols((Locale) lang); + } else if (lang instanceof String){ + return getDateFormatSymbols((String) lang); + } + } + return new DateFormatSymbols(Locale.US); + } + + /** + * Returns a DateFormatSymbols object configured with short month names + * as in the supplied string + * @param shortmonths This should be as described in + * {@link #setShortMonthNames(String) shortMonthNames} + * @return a DateFormatSymbols object configured with short month names + * as in the supplied string + */ + public static DateFormatSymbols getDateFormatSymbols(String shortmonths) + { + String[] months = splitShortMonthString(shortmonths); + DateFormatSymbols dfs = new DateFormatSymbols(Locale.US); + dfs.setShortMonths(months); + return dfs; + } + + private static String[] splitShortMonthString(String shortmonths) { + StringTokenizer st = new StringTokenizer(shortmonths, "|"); + int monthcnt = st.countTokens(); + if (12 != monthcnt) { + throw new IllegalArgumentException( + "expecting a pipe-delimited string containing 12 tokens"); + } + String[] months = new String[13]; + int pos = 0; + while(st.hasMoreTokens()) { + months[pos++] = st.nextToken(); + } + months[pos]=""; + return months; + } + + /** + * Returns a Collection of all the language codes currently supported + * by this class. See {@link #setServerLanguageCode(String) serverLanguageCode} + * for a functional descrption of language codes within this system. + * + * @return a Collection of all the language codes currently supported + * by this class + */ + public static Collection getSupportedLanguageCodes() { + return LANGUAGE_CODE_MAP.keySet(); + } + + +} -- cgit v1.2.3