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920 B
TypeScript

import isURL from 'validator/lib/isURL';
import { send, sendError, fetch } from '../../../util/http';
import { VercelRequest, VercelResponse } from '@vercel/node';
export default async function handler(
req: VercelRequest,
res: VercelResponse
): Promise<void> {
const { query, existIf = '404' } = req.query;
const availableStatus = (existIf as string).split(',').map((s) => s.trim());
if (!query || typeof query !== 'string') {
return sendError(res, new Error('no query given'));
}
if (!isURL(query)) {
return sendError(res, new Error('Invalid URL: ' + query));
}
try {
const response = await fetch(`https://${query}`);
const availability = availableStatus.includes(response.status.toString());
send(res, { availability });
} catch (err: any) {
if ((err as any).code === 'ENOTFOUND') {
return send(res, { availability: true });
}
sendError(res, err);
}
}