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

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