Next.JS FireAndForget background long running

faf.ts

import { getLogger } from '@core-ui/lib/logger';
import { NextApiRequest, NextApiResponse } from 'next';
import { apiHandler } from '@core-ui/lib/apiHandler';

import { internal_runWithWaitUntil as waitUntil } from 'next/dist/server/web/internal-edge-wait-until';

// WARNING: This api handler uses next internal function that is not designed for production
// https://github.com/vercel/next.js/issues/50522#issuecomment-1838593482
const getHandler = async (req: NextApiRequest, res: NextApiResponse): Promise<NextApiResponse> => {
  const logger = getLogger('/api/sitemap.ts:GET');
  logger.info('Fire and Forget triggered');
  const apiSecret = req.query.secret;

  logger.debug(apiSecret, 'apiSecret');
  if (!process.env.API_SECRET) {
    logger.error('API_SECRET is not set');
    return res.status(500).end();
  }

  if (apiSecret !== process.env.API_SECRET) {
    logger.error('API_SECRET is incorrect');
    return res.status(401).end();
  }

  waitUntil(async () => {
    // sleep for 30 seconds to simulate a long running task
    // eslint-disable-next-line no-promise-executor-return
    await new Promise(timesUp => setTimeout(timesUp, 60000));
    logger.info('Done waiting');
  });

  logger.info('Forget about it');
  return res.status(200).end();
};

export default apiHandler({
  GET: Promise.resolve({ default: getHandler }),
});