https://wjmaritz.dev/tags/caching/Recent content in Caching on Wilhelm MaritzHugo -- gohugo.ioenThu, 03 Sep 2026 00:00:00 +0000https://wjmaritz.dev/posts/cloudflare-cached-my-export/Thu, 03 Sep 2026 00:00:00 +0000https://wjmaritz.dev/posts/cloudflare-cached-my-export/<p>I edited some data in an app I maintain, downloaded the Excel export again, and the file showed the state before my edit. On another machine the same download showed the current state.</p> <p>My first suspect was the change I had made to downloads the day before, when <a href="https://wjmaritz.dev/posts/safari-blob-download/">Safari refused to save a file</a>. It wasn&rsquo;t that. The problem predates it.</p> <h2 id="same-url-same-edge-same-file">Same URL, same edge, same file</h2> <p>The app sits behind Cloudflare. None of its 17 export routes sent a <code>Cache-Control</code> header, which I had never thought about because every one of them requires a login.</p>