Clojurians Log v2

So playing a bit with Catacumba, how would one go for implementing something like etags? Just calculate in the ending handler and add to response? Guess there is no way to hook in a function after the ending handler on the “way back”? Or am I missing something?

hi @kardan

Just yesterday I have thought about that

I want implement http cache mechanism in my app and I found the same issue

I don’t need it at the moment, was mostly trying to chew on the model a bit

Implement if-modified-since mechanism is pretty easy

but the etag seems like a little bit difficult

I think ratpack does not provides any way to do it, but I think we can do it at catacumba level

let [resp (do stuff) etag (calculate-etag resp)] (http/ok resp {:etag etag}) ?

yes, but this only calculates the etag, we also need a mechainism for "no send the response in case of request etag matches the response etag

ah, yes

At this moment it is not possible implement, but I'm thinking on it. I would like to have it plugable

in the same way as I also working on content-negotiation

ok, cool to know.

Ratpack provides a beforeSend handler but I think it does not allows overwrite the body

I think I can make a feature proposal for allow overwrite the body on that hook

Well as I said. I don’t really have a usecase for etags. What I build is really early at this point

I don’t have a problem witch cache and etags - but I hope I’ll get one :simple_smile:

😉

https://github.com/ratpack/ratpack/issues/941

👍