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files >> //proc/self/root/usr/lib/node_modules/npm/node_modules/psl/index.js
/*eslint no-var:0, prefer-arrow-callback: 0, object-shorthand: 0 */ 'use strict'; var Punycode = require('punycode'); var internals = {}; // // Read rules from file. // internals.rules = require('./data/rules.json').map(function (rule) { return { rule: rule, suffix: rule.replace(/^(\*\.|\!)/, ''), punySuffix: -1, wildcard: rule.charAt(0) === '*', exception: rule.charAt(0) === '!' }; }); // // Check is given string ends with `suffix`. // internals.endsWith = function (str, suffix) { return str.indexOf(suffix, str.length - suffix.length) !== -1; }; // // Find rule for a given domain. // internals.findRule = function (domain) { var punyDomain = Punycode.toASCII(domain); return internals.rules.reduce(function (memo, rule) { if (rule.punySuffix === -1){ rule.punySuffix = Punycode.toASCII(rule.suffix); } if (!internals.endsWith(punyDomain, '.' + rule.punySuffix) && punyDomain !== rule.punySuffix) { return memo; } // This has been commented out as it never seems to run. This is because // sub tlds always appear after their parents and we never find a shorter // match. //if (memo) { // var memoSuffix = Punycode.toASCII(memo.suffix); // if (memoSuffix.length >= punySuffix.length) { // return memo; // } //} return rule; }, null); }; // // Error codes and messages. // exports.errorCodes = { DOMAIN_TOO_SHORT: 'Domain name too short.', DOMAIN_TOO_LONG: 'Domain name too long. It should be no more than 255 chars.', LABEL_STARTS_WITH_DASH: 'Domain name label can not start with a dash.', LABEL_ENDS_WITH_DASH: 'Domain name label can not end with a dash.', LABEL_TOO_LONG: 'Domain name label should be at most 63 chars long.', LABEL_TOO_SHORT: 'Domain name label should be at least 1 character long.', LABEL_INVALID_CHARS: 'Domain name label can only contain alphanumeric characters or dashes.' }; // // Validate domain name and throw if not valid. // // From wikipedia: // // Hostnames are composed of series of labels concatenated with dots, as are all // domain names. Each label must be between 1 and 63 characters long, and the // entire hostname (including the delimiting dots) has a maximum of 255 chars. // // Allowed chars: // // * `a-z` // * `0-9` // * `-` but not as a starting or ending character // * `.` as a separator for the textual portions of a domain name // // * http://en.wikipedia.org/wiki/Domain_name // * http://en.wikipedia.org/wiki/Hostname // internals.validate = function (input) { // Before we can validate we need to take care of IDNs with unicode chars. var ascii = Punycode.toASCII(input); if (ascii.length < 1) { return 'DOMAIN_TOO_SHORT'; } if (ascii.length > 255) { return 'DOMAIN_TOO_LONG'; } // Check each part's length and allowed chars. var labels = ascii.split('.'); var label; for (var i = 0; i < labels.length; ++i) { label = labels[i]; if (!label.length) { return 'LABEL_TOO_SHORT'; } if (label.length > 63) { return 'LABEL_TOO_LONG'; } if (label.charAt(0) === '-') { return 'LABEL_STARTS_WITH_DASH'; } if (label.charAt(label.length - 1) === '-') { return 'LABEL_ENDS_WITH_DASH'; } if (!/^[a-z0-9\-]+$/.test(label)) { return 'LABEL_INVALID_CHARS'; } } }; // // Public API // // // Parse domain. // exports.parse = function (input) { if (typeof input !== 'string') { throw new TypeError('Domain name must be a string.'); } // Force domain to lowercase. var domain = input.slice(0).toLowerCase(); // Handle FQDN. // TODO: Simply remove trailing dot? if (domain.charAt(domain.length - 1) === '.') { domain = domain.slice(0, domain.length - 1); } // Validate and sanitise input. var error = internals.validate(domain); if (error) { return { input: input, error: { message: exports.errorCodes[error], code: error } }; } var parsed = { input: input, tld: null, sld: null, domain: null, subdomain: null, listed: false }; var domainParts = domain.split('.'); // Non-Internet TLD if (domainParts[domainParts.length - 1] === 'local') { return parsed; } var handlePunycode = function () { if (!/xn--/.test(domain)) { return parsed; } if (parsed.domain) { parsed.domain = Punycode.toASCII(parsed.domain); } if (parsed.subdomain) { parsed.subdomain = Punycode.toASCII(parsed.subdomain); } return parsed; }; var rule = internals.findRule(domain); // Unlisted tld. if (!rule) { if (domainParts.length < 2) { return parsed; } parsed.tld = domainParts.pop(); parsed.sld = domainParts.pop(); parsed.domain = [parsed.sld, parsed.tld].join('.'); if (domainParts.length) { parsed.subdomain = domainParts.pop(); } return handlePunycode(); } // At this point we know the public suffix is listed. parsed.listed = true; var tldParts = rule.suffix.split('.'); var privateParts = domainParts.slice(0, domainParts.length - tldParts.length); if (rule.exception) { privateParts.push(tldParts.shift()); } parsed.tld = tldParts.join('.'); if (!privateParts.length) { return handlePunycode(); } if (rule.wildcard) { tldParts.unshift(privateParts.pop()); parsed.tld = tldParts.join('.'); } if (!privateParts.length) { return handlePunycode(); } parsed.sld = privateParts.pop(); parsed.domain = [parsed.sld, parsed.tld].join('.'); if (privateParts.length) { parsed.subdomain = privateParts.join('.'); } return handlePunycode(); }; // // Get domain. // exports.get = function (domain) { if (!domain) { return null; } return exports.parse(domain).domain || null; }; // // Check whether domain belongs to a known public suffix. // exports.isValid = function (domain) { var parsed = exports.parse(domain); return Boolean(parsed.domain && parsed.listed); };
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