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); } }