---
title: "HTTP"
description: "1 posts about HTTP, summarised, each linking to the original."
---

# HTTP
> 1 posts about HTTP, summarised, each linking to the original.

## Articles

### [We just shipped support for the ugliest part of HTTP: Vary](https://yomu.fyi/post/we-just-shipped-support-for-the-ugliest-part-of-http-vary.md)
- Company: [Cloudflare](https://yomu.fyi/company/cloudflare.md)
- Author: Zaidoon Abd Al Hadi
- Published: Sep 22, 2026
- Type: Announcement

The Vary response header, often called the ugliest part of HTTP, is now supported in Cache Rules on every Cloudflare plan. Vary tells caches which request fields may affect a response, but not which differences actually matter, leading to cache fragmentation or incorrect responses. For example, a server might deliver different image formats to different browsers, and a cache ignoring Vary risks serving the wrong bytes. The origin still names the request headers that may affect a response, but Cloudflare lets users decide how to handle each one. This support addresses the challenge of balancing correct caching with cache efficiency.