58 lines
1.9 KiB
TypeScript
58 lines
1.9 KiB
TypeScript
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import dns from "dns/promises";
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import { getSetting } from "./db";
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export type DnsCheckResult = {
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ok: boolean;
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expected: { ipv4?: string; ipv6?: string };
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resolved: { a: string[]; aaaa: string[]; wwwA: string[]; wwwAaaa: string[] };
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missing: string[];
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};
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export async function getServerIps() {
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return {
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ipv4: getSetting("server_ip") ?? undefined,
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ipv6: getSetting("server_ipv6") ?? undefined,
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};
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}
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async function resolveSafe(name: string, type: "A" | "AAAA"): Promise<string[]> {
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try {
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if (type === "A") return await dns.resolve4(name);
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return await dns.resolve6(name);
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} catch {
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return [];
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}
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}
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export async function checkDomainDns(domain: string, includeWww: boolean): Promise<DnsCheckResult> {
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const expected = await getServerIps();
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const [a, aaaa, wwwA, wwwAaaa] = await Promise.all([
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resolveSafe(domain, "A"),
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resolveSafe(domain, "AAAA"),
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includeWww ? resolveSafe(`www.${domain}`, "A") : Promise.resolve([]),
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includeWww ? resolveSafe(`www.${domain}`, "AAAA") : Promise.resolve([]),
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]);
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const missing: string[] = [];
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const apexHasIpv4 = expected.ipv4 ? a.includes(expected.ipv4) : a.length > 0;
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const apexHasIpv6 = expected.ipv6 ? aaaa.includes(expected.ipv6) : true;
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if (!apexHasIpv4) missing.push(`A ${domain} → ${expected.ipv4 ?? "(server-IP)"}`);
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if (expected.ipv6 && !apexHasIpv6) missing.push(`AAAA ${domain} → ${expected.ipv6}`);
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if (includeWww) {
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const wwwHasIpv4 = expected.ipv4 ? wwwA.includes(expected.ipv4) : wwwA.length > 0;
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if (!wwwHasIpv4) missing.push(`A www.${domain} → ${expected.ipv4 ?? "(server-IP)"}`);
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}
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return {
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ok: missing.length === 0,
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expected,
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resolved: { a, aaaa, wwwA, wwwAaaa },
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missing,
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};
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}
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export function isValidDomain(domain: string): boolean {
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return /^(?!-)[a-z0-9-]+(\.[a-z0-9-]+)+$/i.test(domain) && !domain.includes("..") && domain.length <= 253;
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}
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