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#How to in/revalidate cached data from my external backend, after a mutation
rancid summitBOT
To invalidate the "/friends" route from an external backend in your Next.js application, you can use on-demand revalidation. This feature allows you to revalidate an individual page, ensuring that the next request to the page serves the updated content.
Based on the information provided in the extracts, you can set up an API route in your Next.js application that you can call from your external backend to trigger revalidation of the "/friends" route.
Here's how you can set up the revalidation API route:
-
Create a secret token that is known only to your Next.js app and your external backend. This token will be used to secure the revalidation endpoint.
-
Add the secret token as an environment variable to your Next.js application.
-
Create an API route in your Next.js application that will handle the revalidation request. Here's an example based on the extracts:
// pages/api/revalidate.js
export default async function handler(req, res) {
// Check for secret to confirm this is a valid request
if (req.query.secret !== process.env.MY_SECRET_TOKEN) {
return res.status(401).json({ message: 'Invalid token' });
}
try {
// Revalidate the "/friends" path
await res.revalidate('/friends');
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');
}
}
- From your external backend, after adding a new friend, make a POST request to the revalidation API route with the secret token as a query parameter:
<https://<your-site.com>/api/revalidate?secret=<token>>
Replace <your-site.com> with your actual domain and <token> with the secret token you created.
Please note that the code provided is based on the information from the extracts and should be adapted to fit the specifics of your application, such as the correct path to revalidate and the actual secret token.