2 min read
Honour the header
Read Cache-Control: max-age on the response and cache for exactly that long. Do not invent your own TTL that ignores what the API tells you.
resp = requests.get(f'{BASE}/products', timeout=10)
max_age = parse_max_age(resp.headers.get('Cache-Control', ''))
cache.set('products', resp.json()['data'], ttl=max_age or 3600)Stale-while-revalidate
Serve the cached copy immediately and refresh in the background when it is near expiry. The reader never waits on the API, and a transient failure just serves slightly older data — far better than an error.
Fallback on cold miss
If the cache is empty and the fetch fails, render a static link to business loans rather than an empty grid.
Frequently asked questions
What TTL should I use?
Whatever Cache-Control advertises. If the header is absent, an hour is a safe default for reference data like the catalogue.
Should I cache in the browser or the server?
Both are valid. Server-side caching protects the API best; edge or browser caching adds speed. A Worker or CDN in front is ideal.
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