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