81 lines
2.1 KiB
JavaScript
81 lines
2.1 KiB
JavaScript
/**
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* This file is a copy of validator.js isFQDN method - v13.7.0:
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* https://github.com/validatorjs/validator.js/blob/531dc7f1f75613bec75c6d888b46480455e78dc7/src/lib/isFQDN.js
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*/
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/* eslint-disable camelcase */
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const assertString = require('./util/assert-string');
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const merge = require('./util/merge');
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const default_fqdn_options = {
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require_tld: true,
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allow_underscores: false,
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allow_trailing_dot: false,
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allow_numeric_tld: false,
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allow_wildcard: false
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};
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module.exports = function isFQDN(str, options) {
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assertString(str);
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options = merge(options, default_fqdn_options);
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/* Remove the optional trailing dot before checking validity */
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if (options.allow_trailing_dot && str[str.length - 1] === '.') {
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str = str.substring(0, str.length - 1);
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}
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/* Remove the optional wildcard before checking validity */
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if (options.allow_wildcard === true && str.indexOf('*.') === 0) {
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str = str.substring(2);
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}
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const parts = str.split('.');
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const tld = parts[parts.length - 1];
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if (options.require_tld) {
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// disallow fqdns without tld
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if (parts.length < 2) {
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return false;
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}
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if (!options.allow_numeric_tld && !/^([a-z\u00A1-\u00A8\u00AA-\uD7FF\uF900-\uFDCF\uFDF0-\uFFEF]{2,}|xn[a-z0-9-]{2,})$/i.test(tld)) {
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return false;
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}
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// disallow spaces
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if (/\s/.test(tld)) {
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return false;
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}
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}
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// reject numeric TLDs
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if (!options.allow_numeric_tld && /^\d+$/.test(tld)) {
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return false;
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}
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return parts.every((part) => {
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if (part.length > 63) {
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return false;
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}
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if (!/^[a-z_\u00a1-\uffff0-9-]+$/i.test(part)) {
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return false;
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}
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// disallow full-width chars
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if (/[\uff01-\uff5e]/.test(part)) {
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return false;
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}
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// disallow parts starting or ending with hyphen
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if (/^-|-$/.test(part)) {
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return false;
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}
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if (!options.allow_underscores && /_/.test(part)) {
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return false;
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}
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return true;
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});
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};
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