Cloudflare DevelopersCD
Cloudflare Developers•2y ago
Russell

responses with "cf-cache-status: REVALIDATED" are being stored in cache following fetch()

Symptom:
Edge worker consistently responds for some requests with cf-cache-status: REVALIDATED and no Age header. This happens until this resposne falls out of cache. It occurs randomly across various requests.

Detail:
I have an edge worker that is fetch()ing content from another site which is using cloudflare. Sometimes, a response from the origin has the header cf-cache-status: REVALIDATED. What appears to happen is that my edge worker appears to store this header in it's own cached response.

Question:
How can I ensure this response has cf-cache-status: HIT in the cache? As per my other post, this is tiered caching so I don't think I can modify the response and use cache.put()... Should I manually change it each time in the worker as a cludge? As such?

    let originResponse = await fetch(request, options);
    let response = new Response(originResponse.body, originResponse);
    if (response.headers.get('cf-cache-status') == 'REVALIDATED') {
      response.headers.delete('cf-cache-status');
      response.headers.set('cf-cache-status', 'HIT');
      // delete this cache so next time it is retried - but this supposedly won't work with a domain set up with tiered caching
      cache.delete(cacheKeyUrl);
    }
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