NextJS on-demand revalidation endpoint

revalidate.ts

import { NextApiRequest, NextApiResponse } from "next";

export default async function handler(
  req: NextApiRequest,
  res: NextApiResponse
) {
  if (
    !req.query.revalidate_token ||
    !process.env.REVALIDATE_TOKEN ||
    req.query.revalidate_token !== process.env.REVALIDATE_TOKEN
  ) {
    return res.status(401).json({ message: "Invalid token" });
  }

  if (!req.query.revalidate_path) {
    return res.status(422).json({ message: "No revalidate path provided" });
  }

  try {
    // This should be the actual path e.g. "/my-category/my-story"
    await res.revalidate(req.query.revalidate_path as string);
    return res.json({ revalidated: true });
  } catch (err) {
    // If there was an error, the last successfully generated page will show.
    return res.status(500).send("Error revalidating");
  }
}