Quick explanation of how this is supposed to work

[amit777]

I was wondering if you could provide a quick overview of the concept behind this middleware. I'm trying to get a better understanding of how it works with the etag middleware. The code looks so simple, so I feel like I'm missing something very basic.

Specifically, I see some code to check ctx.fresh and then return 304. But I don't see how ctx.fresh is supposed to get set.

[yaooojia]

I hope this will help you.

1. ctx.fresh is from Koa Request API

2. About setEtag : Koa Etag