You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
103 lines
2.8 KiB
103 lines
2.8 KiB
'use strict';
|
|
|
|
const Url = require('url');
|
|
|
|
|
|
const internals = {
|
|
minDomainSegments: 2,
|
|
nonAsciiRx: /[^\x00-\x7f]/,
|
|
domainControlRx: /[\x00-\x20@\:\/]/, // Control + space + separators
|
|
tldSegmentRx: /^[a-zA-Z](?:[a-zA-Z0-9\-]*[a-zA-Z0-9])?$/,
|
|
domainSegmentRx: /^[a-zA-Z0-9](?:[a-zA-Z0-9\-]*[a-zA-Z0-9])?$/,
|
|
URL: Url.URL || URL // $lab:coverage:ignore$
|
|
};
|
|
|
|
|
|
exports.analyze = function (domain, options = {}) {
|
|
|
|
if (typeof domain !== 'string') {
|
|
throw new Error('Invalid input: domain must be a string');
|
|
}
|
|
|
|
if (!domain) {
|
|
return { error: 'Domain must be a non-empty string' };
|
|
}
|
|
|
|
if (domain.length > 256) {
|
|
return { error: 'Domain too long' };
|
|
}
|
|
|
|
const ascii = !internals.nonAsciiRx.test(domain);
|
|
if (!ascii) {
|
|
if (options.allowUnicode === false) { // Defaults to true
|
|
return { error: 'Domain contains forbidden Unicode characters' };
|
|
}
|
|
|
|
domain = domain.normalize('NFC');
|
|
}
|
|
|
|
if (internals.domainControlRx.test(domain)) {
|
|
return { error: 'Domain contains invalid character' };
|
|
}
|
|
|
|
domain = internals.punycode(domain);
|
|
|
|
// https://tools.ietf.org/html/rfc1035 section 2.3.1
|
|
|
|
const minDomainSegments = options.minDomainSegments || internals.minDomainSegments;
|
|
|
|
const segments = domain.split('.');
|
|
if (segments.length < minDomainSegments) {
|
|
return { error: 'Domain lacks the minimum required number of segments' };
|
|
}
|
|
|
|
const tlds = options.tlds;
|
|
if (tlds) {
|
|
const tld = segments[segments.length - 1].toLowerCase();
|
|
if (tlds.deny && tlds.deny.has(tld) ||
|
|
tlds.allow && !tlds.allow.has(tld)) {
|
|
|
|
return { error: 'Domain uses forbidden TLD' };
|
|
}
|
|
}
|
|
|
|
for (let i = 0; i < segments.length; ++i) {
|
|
const segment = segments[i];
|
|
|
|
if (!segment.length) {
|
|
return { error: 'Domain contains empty dot-separated segment' };
|
|
}
|
|
|
|
if (segment.length > 63) {
|
|
return { error: 'Domain contains dot-separated segment that is too long' };
|
|
}
|
|
|
|
if (i < segments.length - 1) {
|
|
if (!internals.domainSegmentRx.test(segment)) {
|
|
return { error: 'Domain contains invalid character' };
|
|
}
|
|
}
|
|
else {
|
|
if (!internals.tldSegmentRx.test(segment)) {
|
|
return { error: 'Domain contains invalid tld character' };
|
|
}
|
|
}
|
|
}
|
|
};
|
|
|
|
|
|
exports.isValid = function (domain, options) {
|
|
|
|
return !exports.analyze(domain, options);
|
|
};
|
|
|
|
|
|
internals.punycode = function (domain) {
|
|
|
|
try {
|
|
return new internals.URL(`http://${domain}`).host;
|
|
}
|
|
catch (err) {
|
|
return domain;
|
|
}
|
|
};
|
|
|