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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 | 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x 193x | import { Resolver } from 'node:dns/promises';
export class DnsResolver {
constructor() {
this._resolver = new Resolver();
}
/**
* Resolves A records for the given hostname.
*
* @async
* @param {string} hostname - The hostname to resolve A records for.
* @returns {Promise<string[]>} A promise that resolves to an array of IP addresses, or an empty array if not found or an error occurs.
*/
resolveA(hostname) {
return this._resolver.resolve4(hostname).catch((error) => {
switch (error.code) {
case 'ENOTFOUND':
case 'ENODATA':
return [];
}
throw new Error(`Could not resolve DNS for ${hostname}. Caused by: ${error.message}`);
});
}
/**
* Resolves CNAME records for the given hostname.
*
* @async
* @param {string} hostname - The hostname to resolve CNAME records for.
* @returns {Promise<string|null>} A promise that resolves to the CNAME record if found, or null if not found or an error occurs.
*/
resolveCname(hostname) {
return this._resolver.resolveCname(hostname).catch((error) => {
switch (error.code) {
case 'ENOTFOUND':
case 'ENODATA':
return null;
}
throw new Error(`Could not resolve DNS for ${hostname}. Caused by: ${error.message}`);
});
}
}
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