import { send, sendError, fetch } from '../../../util/http'; import { NowRequest, NowResponse } from '@vercel/node'; export default async function handler( req: NowRequest, res: NowResponse ): Promise { const { query } = req.query; if (!query || typeof query !== 'string') { return sendError(res, new Error('No query given')); } if (/[^a-zA-Z0-9_-]/.test(query)) { return sendError(res, new Error('Invalid characters')); } try { const response = await fetch( `https://${encodeURIComponent(query)}.slack.com` ); const availability = response.status !== 200; send(res, { availability }); } catch (err) { sendError(res, err); } }