envoyproxy/envoy

CacheFilter: Serve HEAD requests from cache

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#10,020 opened on Feb 12, 2020

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area/cachehelp wanted

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Description

CacheFilter currently only does cache lookups for GET requests. HEAD requests can also be served from cache. It's not that valuable, but it's also mostly trivial.

We could also insert HEAD responses into cache, but it's probably not worth it.

Contributor guide

Research direction
Modify CacheFilter to perform cache lookup for HEAD requests similarly to GET. Ensure that the response headers and status are appropriate for HEAD. No need to insert HEAD responses into cache.
Tech stack
ccpp
Domain
backendapi
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
1
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
Under 1 hour
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
HTTPC++
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
90