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namae/api/services/dns/[query].ts

35 lines
928 B
TypeScript

import dns from 'dns';
import {send, sendError} from '../../../util/http';
import {NowRequest, NowResponse} from '@vercel/node';
function resolvePromise(hostname: string): Promise<string[]> {
return new Promise((resolve, reject) => {
dns.resolve4(hostname, function (err, addresses) {
if (err) return reject(err);
resolve(addresses);
});
});
}
export default async function handler(
req: NowRequest,
res: NowResponse,
): Promise<void> {
const {query} = req.query;
if (!query || typeof query !== 'string') {
return sendError(res, new Error('No query given'));
}
try {
const response = await resolvePromise(query);
const availability = response && response.length > 0 ? false : true;
send(res, {availability});
} catch (err) {
if (err.code === 'ENODATA' || err.code === 'ENOTFOUND') {
return send(res, {availability: true});
}
sendError(res, err);
}
}