Page revalidation

// pages/api/revalidate.ts file

import type { NextApiRequest, NextApiResponse } from "next";

export default async function handler(req: NextApiRequest, res: NextApiResponse) {
  // Check for secret to confirm this is a valid request
  if (req.query.secret !== process.env.SUNCEL_REVALIDATE_SECRET || req.query.path === undefined) {
    return res.status(401).json({ message: "Invalid token" });
  }

  try {
    // this should be the actual path not a rewritten path
    // e.g. for "/blog/[slug]" this should be "/blog/post-1"
    await res.revalidate(req.query.path as string);
    return res.json({ revalidated: true });
  } catch (err) {
    // If there was an error, Next.js will continue
    // to show the last successfully generated page
    return res.status(500).send("Error revalidating");
  }
}