caching – deploy-and.run

Why Your Full-Page Cache Needs an Opinion About Query Strings

August 29, 2026July 20, 2026 by halimat

Two separate incidents on the same network turned out to be the same root cause wearing different clothes: a cache key that let the request decide what it means, instead of the other way around.

One Bot Request Poisoned Our Cache — And Every Real Visitor Got the Broken Page

August 29, 2026July 13, 2026 by halimat

Ads were randomly missing on one site, with no reproducible pattern anyone could find. The cause was a single automated request with the wrong Accept header, cached and served to everyone after it.