| /* |
| * 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.tomcat.util.buf; |
| |
| import java.nio.charset.Charset; |
| import java.nio.charset.CharsetDecoder; |
| import java.nio.charset.CharsetEncoder; |
| import java.util.Locale; |
| import java.util.concurrent.ConcurrentHashMap; |
| import java.util.concurrent.ConcurrentMap; |
| |
| public class CharsetCache { |
| |
| /* Note: Package private to enable testing without reflection */ |
| static final String[] INITIAL_CHARSETS = new String[] { "iso-8859-1", "utf-8" }; |
| |
| /* |
| * Note: Package private to enable testing without reflection |
| */ |
| static final String[] LAZY_CHARSETS = new String[] { |
| // Initial set from Oracle JDK 8 u192 |
| "037", "1006", "1025", "1026", "1046", "1047", "1089", "1097", "1098", "1112", "1122", "1123", "1124", |
| "1140", "1141", "1142", "1143", "1144", "1145", "1146", "1147", "1148", "1149", "1166", "1364", "1381", |
| "1383", "273", "277", "278", "280", "284", "285", "290", "297", "300", "33722", "420", "424", "437", "500", |
| "5601", "646", "737", "775", "813", "834", "838", "850", "852", "855", "856", "857", "858", "860", "861", |
| "862", "863", "864", "865", "866", "868", "869", "870", "871", "874", "875", "8859_13", "8859_15", "8859_2", |
| "8859_3", "8859_4", "8859_5", "8859_6", "8859_7", "8859_8", "8859_9", "912", "913", "914", "915", "916", |
| "918", "920", "921", "922", "923", "930", "933", "935", "937", "939", "942", "942c", "943", "943c", "948", |
| "949", "949c", "950", "964", "970", "ansi-1251", "ansi_x3.4-1968", "ansi_x3.4-1986", "arabic", "ascii", |
| "ascii7", "asmo-708", "big5", "big5-hkscs", "big5-hkscs", "big5-hkscs-2001", "big5-hkscs:unicode3.0", |
| "big5_hkscs", "big5_hkscs_2001", "big5_solaris", "big5hk", "big5hk-2001", "big5hkscs", "big5hkscs-2001", |
| "ccsid00858", "ccsid01140", "ccsid01141", "ccsid01142", "ccsid01143", "ccsid01144", "ccsid01145", |
| "ccsid01146", "ccsid01147", "ccsid01148", "ccsid01149", "cesu-8", "cesu8", "cns11643", "compound_text", |
| "cp-ar", "cp-gr", "cp-is", "cp00858", "cp01140", "cp01141", "cp01142", "cp01143", "cp01144", "cp01145", |
| "cp01146", "cp01147", "cp01148", "cp01149", "cp037", "cp1006", "cp1025", "cp1026", "cp1046", "cp1047", |
| "cp1089", "cp1097", "cp1098", "cp1112", "cp1122", "cp1123", "cp1124", "cp1140", "cp1141", "cp1142", |
| "cp1143", "cp1144", "cp1145", "cp1146", "cp1147", "cp1148", "cp1149", "cp1166", "cp1250", "cp1251", |
| "cp1252", "cp1253", "cp1254", "cp1255", "cp1256", "cp1257", "cp1258", "cp1364", "cp1381", "cp1383", "cp273", |
| "cp277", "cp278", "cp280", "cp284", "cp285", "cp290", "cp297", "cp300", "cp33722", "cp367", "cp420", |
| "cp424", "cp437", "cp500", "cp50220", "cp50221", "cp5346", "cp5347", "cp5348", "cp5349", "cp5350", "cp5353", |
| "cp737", "cp775", "cp813", "cp833", "cp834", "cp838", "cp850", "cp852", "cp855", "cp856", "cp857", "cp858", |
| "cp860", "cp861", "cp862", "cp863", "cp864", "cp865", "cp866", "cp868", "cp869", "cp870", "cp871", "cp874", |
| "cp875", "cp912", "cp913", "cp914", "cp915", "cp916", "cp918", "cp920", "cp921", "cp922", "cp923", "cp930", |
| "cp933", "cp935", "cp936", "cp937", "cp939", "cp942", "cp942c", "cp943", "cp943c", "cp948", "cp949", |
| "cp949c", "cp950", "cp964", "cp970", "cpibm284", "cpibm285", "cpibm297", "cpibm37", "cs-ebcdic-cp-ca", |
| "cs-ebcdic-cp-nl", "cs-ebcdic-cp-us", "cs-ebcdic-cp-wt", "csascii", "csbig5", "cscesu-8", "cseuckr", |
| "cseucpkdfmtjapanese", "cshalfwidthkatakana", "csibm037", "csibm278", "csibm284", "csibm285", "csibm290", |
| "csibm297", "csibm420", "csibm424", "csibm500", "csibm857", "csibm860", "csibm861", "csibm862", "csibm863", |
| "csibm864", "csibm865", "csibm866", "csibm868", "csibm869", "csibm870", "csibm871", "csiso153gost1976874", |
| "csiso159jisx02121990", "csiso2022cn", "csiso2022jp", "csiso2022jp2", "csiso2022kr", "csiso87jisx0208", |
| "csisolatin0", "csisolatin2", "csisolatin3", "csisolatin4", "csisolatin5", "csisolatin9", |
| "csisolatinarabic", "csisolatincyrillic", "csisolatingreek", "csisolatinhebrew", "csjisencoding", "cskoi8r", |
| "cspc850multilingual", "cspc862latinhebrew", "cspc8codepage437", "cspcp852", "cspcp855", "csshiftjis", |
| "cswindows31j", "cyrillic", "default", "ebcdic-cp-ar1", "ebcdic-cp-ar2", "ebcdic-cp-bh", "ebcdic-cp-ca", |
| "ebcdic-cp-ch", "ebcdic-cp-fr", "ebcdic-cp-gb", "ebcdic-cp-he", "ebcdic-cp-is", "ebcdic-cp-nl", |
| "ebcdic-cp-roece", "ebcdic-cp-se", "ebcdic-cp-us", "ebcdic-cp-wt", "ebcdic-cp-yu", "ebcdic-de-273+euro", |
| "ebcdic-dk-277+euro", "ebcdic-es-284+euro", "ebcdic-fi-278+euro", "ebcdic-fr-277+euro", "ebcdic-gb", |
| "ebcdic-gb-285+euro", "ebcdic-international-500+euro", "ebcdic-it-280+euro", "ebcdic-jp-kana", |
| "ebcdic-no-277+euro", "ebcdic-s-871+euro", "ebcdic-se-278+euro", "ebcdic-sv", "ebcdic-us-037+euro", |
| "ecma-114", "ecma-118", "elot_928", "euc-cn", "euc-jp", "euc-jp-linux", "euc-kr", "euc-tw", "euc_cn", |
| "euc_jp", "euc_jp_linux", "euc_jp_solaris", "euc_kr", "euc_tw", "euccn", "eucjis", "eucjp", "eucjp-open", |
| "euckr", "euctw", "extended_unix_code_packed_format_for_japanese", "gb18030", "gb18030-2000", "gb2312", |
| "gb2312", "gb2312-1980", "gb2312-80", "gbk", "greek", "greek8", "hebrew", "ibm-037", "ibm-1006", "ibm-1025", |
| "ibm-1026", "ibm-1046", "ibm-1047", "ibm-1089", "ibm-1097", "ibm-1098", "ibm-1112", "ibm-1122", "ibm-1123", |
| "ibm-1124", "ibm-1166", "ibm-1364", "ibm-1381", "ibm-1383", "ibm-273", "ibm-277", "ibm-278", "ibm-280", |
| "ibm-284", "ibm-285", "ibm-290", "ibm-297", "ibm-300", "ibm-33722", "ibm-33722_vascii_vpua", "ibm-37", |
| "ibm-420", "ibm-424", "ibm-437", "ibm-500", "ibm-5050", "ibm-737", "ibm-775", "ibm-813", "ibm-833", |
| "ibm-834", "ibm-838", "ibm-850", "ibm-852", "ibm-855", "ibm-856", "ibm-857", "ibm-860", "ibm-861", |
| "ibm-862", "ibm-863", "ibm-864", "ibm-865", "ibm-866", "ibm-868", "ibm-869", "ibm-870", "ibm-871", |
| "ibm-874", "ibm-875", "ibm-912", "ibm-913", "ibm-914", "ibm-915", "ibm-916", "ibm-918", "ibm-920", |
| "ibm-921", "ibm-922", "ibm-923", "ibm-930", "ibm-933", "ibm-935", "ibm-937", "ibm-939", "ibm-942", |
| "ibm-942c", "ibm-943", "ibm-943c", "ibm-948", "ibm-949", "ibm-949c", "ibm-950", "ibm-964", "ibm-970", |
| "ibm-euckr", "ibm-thai", "ibm00858", "ibm01140", "ibm01141", "ibm01142", "ibm01143", "ibm01144", "ibm01145", |
| "ibm01146", "ibm01147", "ibm01148", "ibm01149", "ibm037", "ibm037", "ibm1006", "ibm1025", "ibm1026", |
| "ibm1026", "ibm1046", "ibm1047", "ibm1089", "ibm1097", "ibm1098", "ibm1112", "ibm1122", "ibm1123", |
| "ibm1124", "ibm1166", "ibm1364", "ibm1381", "ibm1383", "ibm273", "ibm273", "ibm277", "ibm277", "ibm278", |
| "ibm278", "ibm280", "ibm280", "ibm284", "ibm284", "ibm285", "ibm285", "ibm290", "ibm290", "ibm297", |
| "ibm297", "ibm300", "ibm33722", "ibm367", "ibm420", "ibm420", "ibm424", "ibm424", "ibm437", "ibm437", |
| "ibm500", "ibm500", "ibm737", "ibm775", "ibm775", "ibm813", "ibm833", "ibm834", "ibm838", "ibm850", |
| "ibm850", "ibm852", "ibm852", "ibm855", "ibm855", "ibm856", "ibm857", "ibm857", "ibm860", "ibm860", |
| "ibm861", "ibm861", "ibm862", "ibm862", "ibm863", "ibm863", "ibm864", "ibm864", "ibm865", "ibm865", |
| "ibm866", "ibm866", "ibm868", "ibm868", "ibm869", "ibm869", "ibm870", "ibm870", "ibm871", "ibm871", |
| "ibm874", "ibm875", "ibm912", "ibm913", "ibm914", "ibm915", "ibm916", "ibm918", "ibm920", "ibm921", |
| "ibm922", "ibm923", "ibm930", "ibm933", "ibm935", "ibm937", "ibm939", "ibm942", "ibm942c", "ibm943", |
| "ibm943c", "ibm948", "ibm949", "ibm949c", "ibm950", "ibm964", "ibm970", "iscii", "iscii91", |
| "iso-10646-ucs-2", "iso-2022-cn", "iso-2022-cn-cns", "iso-2022-cn-gb", "iso-2022-jp", "iso-2022-jp-2", |
| "iso-2022-kr", "iso-8859-11", "iso-8859-13", "iso-8859-15", "iso-8859-15", "iso-8859-2", "iso-8859-3", |
| "iso-8859-4", "iso-8859-5", "iso-8859-6", "iso-8859-7", "iso-8859-8", "iso-8859-9", "iso-ir-101", |
| "iso-ir-109", "iso-ir-110", "iso-ir-126", "iso-ir-127", "iso-ir-138", "iso-ir-144", "iso-ir-148", |
| "iso-ir-153", "iso-ir-159", "iso-ir-6", "iso-ir-87", "iso2022cn", "iso2022cn_cns", "iso2022cn_gb", |
| "iso2022jp", "iso2022jp2", "iso2022kr", "iso646-us", "iso8859-13", "iso8859-15", "iso8859-2", "iso8859-3", |
| "iso8859-4", "iso8859-5", "iso8859-6", "iso8859-7", "iso8859-8", "iso8859-9", "iso8859_11", "iso8859_13", |
| "iso8859_15", "iso8859_15_fdis", "iso8859_2", "iso8859_3", "iso8859_4", "iso8859_5", "iso8859_6", |
| "iso8859_7", "iso8859_8", "iso8859_9", "iso_646.irv:1983", "iso_646.irv:1991", "iso_8859-13", "iso_8859-15", |
| "iso_8859-2", "iso_8859-2:1987", "iso_8859-3", "iso_8859-3:1988", "iso_8859-4", "iso_8859-4:1988", |
| "iso_8859-5", "iso_8859-5:1988", "iso_8859-6", "iso_8859-6:1987", "iso_8859-7", "iso_8859-7:1987", |
| "iso_8859-8", "iso_8859-8:1988", "iso_8859-9", "iso_8859-9:1989", "jis", "jis0201", "jis0208", "jis0212", |
| "jis_c6226-1983", "jis_encoding", "jis_x0201", "jis_x0201", "jis_x0208-1983", "jis_x0212-1990", |
| "jis_x0212-1990", "jisautodetect", "johab", "koi8", "koi8-r", "koi8-u", "koi8_r", "koi8_u", |
| "ks_c_5601-1987", "ksc5601", "ksc5601-1987", "ksc5601-1992", "ksc5601_1987", "ksc5601_1992", "ksc_5601", |
| "l2", "l3", "l4", "l5", "l9", "latin0", "latin2", "latin3", "latin4", "latin5", "latin9", "macarabic", |
| "maccentraleurope", "maccroatian", "maccyrillic", "macdingbat", "macgreek", "machebrew", "maciceland", |
| "macroman", "macromania", "macsymbol", "macthai", "macturkish", "macukraine", "ms-874", "ms1361", "ms50220", |
| "ms50221", "ms874", "ms932", "ms936", "ms949", "ms950", "ms950_hkscs", "ms950_hkscs_xp", "ms_936", "ms_949", |
| "ms_kanji", "pc-multilingual-850+euro", "pck", "shift-jis", "shift_jis", "shift_jis", "sjis", |
| "st_sev_358-88", "sun_eu_greek", "tis-620", "tis620", "tis620.2533", "unicode", "unicodebig", |
| "unicodebigunmarked", "unicodelittle", "unicodelittleunmarked", "us", "us-ascii", "utf-16", "utf-16be", |
| "utf-16le", "utf-32", "utf-32be", "utf-32be-bom", "utf-32le", "utf-32le-bom", "utf16", "utf32", "utf_16", |
| "utf_16be", "utf_16le", "utf_32", "utf_32be", "utf_32be_bom", "utf_32le", "utf_32le_bom", "windows-1250", |
| "windows-1251", "windows-1252", "windows-1253", "windows-1254", "windows-1255", "windows-1256", |
| "windows-1257", "windows-1258", "windows-31j", "windows-437", "windows-874", "windows-932", "windows-936", |
| "windows-949", "windows-950", "windows-iso2022jp", "windows949", "x-big5-hkscs-2001", "x-big5-solaris", |
| "x-compound-text", "x-compound_text", "x-euc-cn", "x-euc-jp", "x-euc-jp-linux", "x-euc-tw", "x-eucjp", |
| "x-eucjp-open", "x-ibm1006", "x-ibm1025", "x-ibm1046", "x-ibm1097", "x-ibm1098", "x-ibm1112", "x-ibm1122", |
| "x-ibm1123", "x-ibm1124", "x-ibm1166", "x-ibm1364", "x-ibm1381", "x-ibm1383", "x-ibm300", "x-ibm33722", |
| "x-ibm737", "x-ibm833", "x-ibm834", "x-ibm856", "x-ibm874", "x-ibm875", "x-ibm921", "x-ibm922", "x-ibm930", |
| "x-ibm933", "x-ibm935", "x-ibm937", "x-ibm939", "x-ibm942", "x-ibm942c", "x-ibm943", "x-ibm943c", |
| "x-ibm948", "x-ibm949", "x-ibm949c", "x-ibm950", "x-ibm964", "x-ibm970", "x-iscii91", "x-iso-2022-cn-cns", |
| "x-iso-2022-cn-gb", "x-iso-8859-11", "x-jis0208", "x-jisautodetect", "x-johab", "x-macarabic", |
| "x-maccentraleurope", "x-maccroatian", "x-maccyrillic", "x-macdingbat", "x-macgreek", "x-machebrew", |
| "x-maciceland", "x-macroman", "x-macromania", "x-macsymbol", "x-macthai", "x-macturkish", "x-macukraine", |
| "x-ms932_0213", "x-ms950-hkscs", "x-ms950-hkscs-xp", "x-mswin-936", "x-pck", "x-sjis", "x-sjis_0213", |
| "x-utf-16be", "x-utf-16le", "x-utf-16le-bom", "x-utf-32be", "x-utf-32be-bom", "x-utf-32le", |
| "x-utf-32le-bom", "x-windows-50220", "x-windows-50221", "x-windows-874", "x-windows-949", "x-windows-950", |
| "x-windows-iso2022jp", "x0201", "x0208", "x0212", "x11-compound_text", |
| // Added from Oracle JDK 10.0.2 |
| "csiso885915", "csiso885916", "iso-8859-16", "iso-ir-226", "iso_8859-16", "iso_8859-16:2001", "l10", |
| "latin-9", "latin10", "ms932-0213", "ms932:2004", "ms932_0213", "shift_jis:2004", "shift_jis_0213:2004", |
| "sjis-0213", "sjis:2004", "sjis_0213", "sjis_0213:2004", "windows-932-0213", "windows-932:2004", |
| // Added from OpenJDK 11.0.1 |
| "932", "cp932", "cpeuccn", "ibm-1252", "ibm-932", "ibm-euccn", "ibm1252", "ibm932", "ibmeuccn", "x-ibm932", |
| // Added from OpenJDK 12 ea28 |
| "1129", "cp1129", "ibm-1129", "ibm-euctw", "ibm1129", "x-ibm1129", |
| // Added from OpenJDK 13 ea15 |
| "29626c", "833", "cp29626c", "ibm-1140", "ibm-1141", "ibm-1142", "ibm-1143", "ibm-1144", "ibm-1145", |
| "ibm-1146", "ibm-1147", "ibm-1148", "ibm-1149", "ibm-29626c", "ibm-858", "ibm-eucjp", "ibm1140", "ibm1141", |
| "ibm1142", "ibm1143", "ibm1144", "ibm1145", "ibm1146", "ibm1147", "ibm1148", "ibm1149", "ibm29626c", |
| "ibm858", "x-ibm29626c" |
| }; |
| |
| private static final Charset DUMMY_CHARSET = new DummyCharset("Dummy", null); |
| |
| private ConcurrentMap<String,Charset> cache = new ConcurrentHashMap<String, Charset>(); |
| |
| public CharsetCache() { |
| // Pre-populate the cache |
| for (String charsetName : INITIAL_CHARSETS) { |
| Charset charset = Charset.forName(charsetName); |
| addToCache(charsetName, charset); |
| } |
| |
| for (String charsetName : LAZY_CHARSETS) { |
| addToCache(charsetName, DUMMY_CHARSET); |
| } |
| } |
| |
| |
| private void addToCache(String name, Charset charset) { |
| cache.put(name, charset); |
| for (String alias : charset.aliases()) { |
| cache.put(alias.toLowerCase(Locale.ENGLISH), charset); |
| } |
| } |
| |
| |
| public Charset getCharset(String charsetName) { |
| String lcCharsetName = charsetName.toLowerCase(Locale.ENGLISH); |
| |
| Charset result = cache.get(lcCharsetName); |
| |
| if (result == DUMMY_CHARSET) { |
| // Name is known but the Charset is not in the cache |
| Charset charset = Charset.forName(lcCharsetName); |
| if (charset == null) { |
| // Charset not available in this JVM - remove cache entry |
| cache.remove(lcCharsetName); |
| result = null; |
| } else { |
| // Charset is available - populate cache entry |
| addToCache(lcCharsetName, charset); |
| result = charset; |
| } |
| } |
| |
| return result; |
| } |
| |
| |
| /* |
| * Placeholder Charset implementation for entries that will be loaded lazily |
| * into the cache. |
| */ |
| private static class DummyCharset extends Charset { |
| |
| protected DummyCharset(String canonicalName, String[] aliases) { |
| super(canonicalName, aliases); |
| } |
| |
| @Override |
| public boolean contains(Charset cs) { |
| return false; |
| } |
| |
| @Override |
| public CharsetDecoder newDecoder() { |
| return null; |
| } |
| |
| @Override |
| public CharsetEncoder newEncoder() { |
| return null; |
| } |
| } |
| } |
