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.
57 lines
2.2 KiB
57 lines
2.2 KiB
const BLACKLISTED_SUBDOMAINS = new Set([
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// from wiki page as of 2018-12-14
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'aws',
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'gristlogin',
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'issues',
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'metrics',
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'phab',
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'releases',
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'test',
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'vpn',
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'www',
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// A few more reserved just in case. The minimum length requirement would eliminate
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// some in any case, but specified here also in case that minimum changes.
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'w', 'ww', 'wwww', 'wwwww',
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'docs', 'api', 'static',
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'ftp', 'imap', 'pop', 'smtp', 'mail', 'git', 'blog', 'wiki', 'support', 'kb', 'help',
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'admin', 'store', 'dev', 'beta', 'dev',
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// a few random tech brands
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'google', 'apple', 'microsoft', 'ms', 'facebook', 'fb', 'twitter', 'youtube', 'yt',
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// updates for new special domains
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'current', 'staging', 'prod', 'login', 'login-dev',
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]);
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/**
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*
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* Checks whether the subdomain is on the list of forbidden subdomains.
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* See https://phab.getgrist.com/w/hosting/v1/urls/#organization-subdomains
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*
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* Also enforces various sanity checks.
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*
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* Throws if the subdomain is invalid.
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*
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*/
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export function checkSubdomainValidity(subdomain: string): void {
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// stick with limited alphanumeric subdomains.
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if (!(/^[a-z][-a-z0-9]*$/.test(subdomain))) {
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throw new Error('Domain must include letters, numbers, and dashes only.');
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}
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// 'docs-*' is reserved for personal orgs.
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if (subdomain.startsWith('docs-')) { throw new Error('Domain cannot use reserved prefix "docs-".'); }
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// 'doc-worker-*' is reserved for doc workers.
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if (subdomain.startsWith('doc-worker-')) { throw new Error('Domain cannot use reserved prefix "doc-worker-".'); }
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// special subdomains like _domainkey.
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if (subdomain.startsWith('_')) { throw new Error('Domain cannot use reserved prefix "_".'); }
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// some domains are currently in use for testing v1.
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if (subdomain.startsWith('v1-')) { throw new Error('Domain cannot use reserved prefix "v1-".'); }
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// check limit of 63 characters on dns label.
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if (subdomain.length > 63) { throw new Error('Domain must contain less than 64 characters.'); }
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// check the subdomain isn't too short.
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if (subdomain.length <= 2) { throw new Error('Domain must contain more than 2 characters.'); }
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// a small blacklist prepared by hand.
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if (BLACKLISTED_SUBDOMAINS.has(subdomain)) { throw new Error('Invalid domain value.'); }
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}
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