| 'use strict' |
| |
| /** |
| * @see https://encoding.spec.whatwg.org/#concept-encoding-get |
| * @param {string|undefined} label |
| */ |
| function getEncoding (label) { |
| if (!label) { |
| return 'failure' |
| } |
| |
| // 1. Remove any leading and trailing ASCII whitespace from label. |
| // 2. If label is an ASCII case-insensitive match for any of the |
| // labels listed in the table below, then return the |
| // corresponding encoding; otherwise return failure. |
| switch (label.trim().toLowerCase()) { |
| case 'unicode-1-1-utf-8': |
| case 'unicode11utf8': |
| case 'unicode20utf8': |
| case 'utf-8': |
| case 'utf8': |
| case 'x-unicode20utf8': |
| return 'UTF-8' |
| case '866': |
| case 'cp866': |
| case 'csibm866': |
| case 'ibm866': |
| return 'IBM866' |
| case 'csisolatin2': |
| case 'iso-8859-2': |
| case 'iso-ir-101': |
| case 'iso8859-2': |
| case 'iso88592': |
| case 'iso_8859-2': |
| case 'iso_8859-2:1987': |
| case 'l2': |
| case 'latin2': |
| return 'ISO-8859-2' |
| case 'csisolatin3': |
| case 'iso-8859-3': |
| case 'iso-ir-109': |
| case 'iso8859-3': |
| case 'iso88593': |
| case 'iso_8859-3': |
| case 'iso_8859-3:1988': |
| case 'l3': |
| case 'latin3': |
| return 'ISO-8859-3' |
| case 'csisolatin4': |
| case 'iso-8859-4': |
| case 'iso-ir-110': |
| case 'iso8859-4': |
| case 'iso88594': |
| case 'iso_8859-4': |
| case 'iso_8859-4:1988': |
| case 'l4': |
| case 'latin4': |
| return 'ISO-8859-4' |
| case 'csisolatincyrillic': |
| case 'cyrillic': |
| case 'iso-8859-5': |
| case 'iso-ir-144': |
| case 'iso8859-5': |
| case 'iso88595': |
| case 'iso_8859-5': |
| case 'iso_8859-5:1988': |
| return 'ISO-8859-5' |
| case 'arabic': |
| case 'asmo-708': |
| case 'csiso88596e': |
| case 'csiso88596i': |
| case 'csisolatinarabic': |
| case 'ecma-114': |
| case 'iso-8859-6': |
| case 'iso-8859-6-e': |
| case 'iso-8859-6-i': |
| case 'iso-ir-127': |
| case 'iso8859-6': |
| case 'iso88596': |
| case 'iso_8859-6': |
| case 'iso_8859-6:1987': |
| return 'ISO-8859-6' |
| case 'csisolatingreek': |
| case 'ecma-118': |
| case 'elot_928': |
| case 'greek': |
| case 'greek8': |
| case 'iso-8859-7': |
| case 'iso-ir-126': |
| case 'iso8859-7': |
| case 'iso88597': |
| case 'iso_8859-7': |
| case 'iso_8859-7:1987': |
| case 'sun_eu_greek': |
| return 'ISO-8859-7' |
| case 'csiso88598e': |
| case 'csisolatinhebrew': |
| case 'hebrew': |
| case 'iso-8859-8': |
| case 'iso-8859-8-e': |
| case 'iso-ir-138': |
| case 'iso8859-8': |
| case 'iso88598': |
| case 'iso_8859-8': |
| case 'iso_8859-8:1988': |
| case 'visual': |
| return 'ISO-8859-8' |
| case 'csiso88598i': |
| case 'iso-8859-8-i': |
| case 'logical': |
| return 'ISO-8859-8-I' |
| case 'csisolatin6': |
| case 'iso-8859-10': |
| case 'iso-ir-157': |
| case 'iso8859-10': |
| case 'iso885910': |
| case 'l6': |
| case 'latin6': |
| return 'ISO-8859-10' |
| case 'iso-8859-13': |
| case 'iso8859-13': |
| case 'iso885913': |
| return 'ISO-8859-13' |
| case 'iso-8859-14': |
| case 'iso8859-14': |
| case 'iso885914': |
| return 'ISO-8859-14' |
| case 'csisolatin9': |
| case 'iso-8859-15': |
| case 'iso8859-15': |
| case 'iso885915': |
| case 'iso_8859-15': |
| case 'l9': |
| return 'ISO-8859-15' |
| case 'iso-8859-16': |
| return 'ISO-8859-16' |
| case 'cskoi8r': |
| case 'koi': |
| case 'koi8': |
| case 'koi8-r': |
| case 'koi8_r': |
| return 'KOI8-R' |
| case 'koi8-ru': |
| case 'koi8-u': |
| return 'KOI8-U' |
| case 'csmacintosh': |
| case 'mac': |
| case 'macintosh': |
| case 'x-mac-roman': |
| return 'macintosh' |
| case 'iso-8859-11': |
| case 'iso8859-11': |
| case 'iso885911': |
| case 'tis-620': |
| case 'windows-874': |
| return 'windows-874' |
| case 'cp1250': |
| case 'windows-1250': |
| case 'x-cp1250': |
| return 'windows-1250' |
| case 'cp1251': |
| case 'windows-1251': |
| case 'x-cp1251': |
| return 'windows-1251' |
| case 'ansi_x3.4-1968': |
| case 'ascii': |
| case 'cp1252': |
| case 'cp819': |
| case 'csisolatin1': |
| case 'ibm819': |
| case 'iso-8859-1': |
| case 'iso-ir-100': |
| case 'iso8859-1': |
| case 'iso88591': |
| case 'iso_8859-1': |
| case 'iso_8859-1:1987': |
| case 'l1': |
| case 'latin1': |
| case 'us-ascii': |
| case 'windows-1252': |
| case 'x-cp1252': |
| return 'windows-1252' |
| case 'cp1253': |
| case 'windows-1253': |
| case 'x-cp1253': |
| return 'windows-1253' |
| case 'cp1254': |
| case 'csisolatin5': |
| case 'iso-8859-9': |
| case 'iso-ir-148': |
| case 'iso8859-9': |
| case 'iso88599': |
| case 'iso_8859-9': |
| case 'iso_8859-9:1989': |
| case 'l5': |
| case 'latin5': |
| case 'windows-1254': |
| case 'x-cp1254': |
| return 'windows-1254' |
| case 'cp1255': |
| case 'windows-1255': |
| case 'x-cp1255': |
| return 'windows-1255' |
| case 'cp1256': |
| case 'windows-1256': |
| case 'x-cp1256': |
| return 'windows-1256' |
| case 'cp1257': |
| case 'windows-1257': |
| case 'x-cp1257': |
| return 'windows-1257' |
| case 'cp1258': |
| case 'windows-1258': |
| case 'x-cp1258': |
| return 'windows-1258' |
| case 'x-mac-cyrillic': |
| case 'x-mac-ukrainian': |
| return 'x-mac-cyrillic' |
| case 'chinese': |
| case 'csgb2312': |
| case 'csiso58gb231280': |
| case 'gb2312': |
| case 'gb_2312': |
| case 'gb_2312-80': |
| case 'gbk': |
| case 'iso-ir-58': |
| case 'x-gbk': |
| return 'GBK' |
| case 'gb18030': |
| return 'gb18030' |
| case 'big5': |
| case 'big5-hkscs': |
| case 'cn-big5': |
| case 'csbig5': |
| case 'x-x-big5': |
| return 'Big5' |
| case 'cseucpkdfmtjapanese': |
| case 'euc-jp': |
| case 'x-euc-jp': |
| return 'EUC-JP' |
| case 'csiso2022jp': |
| case 'iso-2022-jp': |
| return 'ISO-2022-JP' |
| case 'csshiftjis': |
| case 'ms932': |
| case 'ms_kanji': |
| case 'shift-jis': |
| case 'shift_jis': |
| case 'sjis': |
| case 'windows-31j': |
| case 'x-sjis': |
| return 'Shift_JIS' |
| case 'cseuckr': |
| case 'csksc56011987': |
| case 'euc-kr': |
| case 'iso-ir-149': |
| case 'korean': |
| case 'ks_c_5601-1987': |
| case 'ks_c_5601-1989': |
| case 'ksc5601': |
| case 'ksc_5601': |
| case 'windows-949': |
| return 'EUC-KR' |
| case 'csiso2022kr': |
| case 'hz-gb-2312': |
| case 'iso-2022-cn': |
| case 'iso-2022-cn-ext': |
| case 'iso-2022-kr': |
| case 'replacement': |
| return 'replacement' |
| case 'unicodefffe': |
| case 'utf-16be': |
| return 'UTF-16BE' |
| case 'csunicode': |
| case 'iso-10646-ucs-2': |
| case 'ucs-2': |
| case 'unicode': |
| case 'unicodefeff': |
| case 'utf-16': |
| case 'utf-16le': |
| return 'UTF-16LE' |
| case 'x-user-defined': |
| return 'x-user-defined' |
| default: return 'failure' |
| } |
| } |
| |
| module.exports = { |
| getEncoding |
| } |
