/* * 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" ,// Added from OpenJDK 15 ea24 "iso8859_16" ,// Added from HPE JVM 1.8.0.17-hp-ux "cp1051" , "cp1386" , "cshproman8" , "hp-roman8" , "ibm-1051" , "r8" , "roman8" , "roman9" ,// Added from OpenJDK 21 ea18 "gb18030-2022" // If you add and entry to this list, ensure you run // TestCharsetUtil#testIsAcsiiSupersetAll() private static final Charset DUMMY_CHARSET = new DummyCharset("Dummy" , null );private ConcurrentMap<String,Charset> cache = new ConcurrentHashMap<>();public CharsetCache() {// Pre-populate the cache for (String charsetName : INITIAL_CHARSETS) {for (String charsetName : LAZY_CHARSETS) {private void addToCache(String name, Charset charset) {for (String alias : charset.aliases()) {public Charset getCharset(String charsetName) {if (result == DUMMY_CHARSET) {// Name is known but the Charset is not in the cache if (charset == null ) {// Charset not available in this JVM - remove cache entry null ;else {// Charset is available - populate cache entry 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);public boolean contains(Charset cs) {return false ;public CharsetDecoder newDecoder() {return null ;public CharsetEncoder newEncoder() {return null ;quality 91%
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