@mark01/express-utils/lib/middlewares/accept.js

npm package that contains utilities for express.js

import { AppError } from '../error';
export const accept = () => (req, _, next) => {
    const { accept } = req.headers;
    if (!accept?.includes('application/json') &&
        !accept?.includes('application/vnd.auth.v1+json')) {
        next(new AppError('API does not support the requested content type.', 406));
        return;
    }
    next();
};
export default accept;