Is it possible to cache based on request body?

Description

Contributor guide

Tech stack

rust

Domain

backend

Issue type

feature

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

3

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

half day

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

needs maintainer response

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

needs investigation

Prerequisites

Rust programmingUnderstanding of HTTP cachingFamiliarity with Pingora's lifecycle

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

25

Research direction

First, examine the Pingora source code, particularly the `CacheKey` generation in the `Cache` trait and the request handler lifecycle hooks to determine if the request body is available before cache key generation. Review any existing tests or documentation related to cache key customization. Then, discuss in the issue whether a new hook or method could be added to allow body based cache keys, referencing similar patterns in other caching proxies. Finally, propose a minimal design for maintainer feedback.