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

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import { NowRequest, NowResponse } from '@vercel/node';
import { fetch, send, sendError } from '../../../util/http';
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export default async function handler(
req: NowRequest,
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res: NowResponse
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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 {
const response = await fetch(
`https://api.twitter.com/i/users/username_available.json?username=${query}`,
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'GET'
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).then((res) => res.json());
const availability = response.valid;
send(res, { availability });
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} catch (err) {
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sendError(res, err);
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}
}