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kotlinlang

Does Apollo support anything similar to e-tags?

Hi! If you mean HTTP ETag, that's supported by OkHttp (the underlying client used by Apollo) if you configure it with a cache, and that should work if you use GET (by default Apollo will use POST but you can configure it).

But as you said "similar to" maybe you mean something else? :slightly_smiling_face:

I was just reading this article <https://www.apollographql.com/blog/backend/caching/graphql-caching-the-elephant-in-the-room/|here> after I asked the question

&gt;  we could say that a GraphQL query’s max-age is equal to the field in the query with the lowest max-age.


Well this article talks about HTTP caching but Apollo Kotlin also has a <https://www.apollographql.com/docs/kotlin/caching/normalized-cache|normalized cache>, which currently doesn't have a notion of expiration / max-age, but that's something that we're <https://github.com/apollographql/apollo-kotlin/pull/4009|currently looking at>.

If you're using Apollo server you can also have a look at how caching works with it <https://www.apollographql.com/docs/apollo-server/performance/caching/|here>

Out of curiosity, does your server send some etags?