Only cache non empty responses

Edgio Q&A
,
1

How do I conditionally cache only non empty responses?

2

If you’re proxying an origin, you can use transformResponse to set the statusCode to a 5xx. Any response with a status >= 400 will not be cached.

  router.get('/', ({ proxy }) => {
    proxy('origin', {
      transformResponse(response) {
        if (response.body.length === 0) {
          response.statusCode = 500
        }
      }
    })
  })

Similarly, if you’re doing SSR on Layer0 serverless, you add the transformResponse option to renderWithApp. Here’s an example:

  router.get('/', ({ renderWithApp }) => {
    renderWithApp({
      transformResponse(response) {
        if (response.body.length === 0) {
          response.statusCode = 500
        }
      }
    })
  })