Add a function to zlib data compression

[razonyang]

One use case is to generate Kroki.io diagrams without requesting APIs, and reduce build time and avoid network issues.

[bep]

You can POST diagrams to Kroki, see https://docs.kroki.io/kroki/setup/usage/#post-request -- I'm not sure your other arguments are very convincing. Build time should be the same. What network issues?

[razonyang]

You can POST diagrams to Kroki

Yes, I can, I'm implementing it via GetRemote.

Build time should be the same

APIs should take more time than local compression. With this feature, there won't be HTTP requests during the build stage.

What network issues?

One example is that the API may crash sometime, which could cause the build to fail.

[jmooring]

It seems to me that calling the Kroki API once with a POST request (and caching the returned image) makes more sense that to have every client call the Kroki API with a GET request.

I would rather know about a Kroki API crash during a build than have clients see broken images.

[bep]

APIs should take more time than local compression. With this feature, there won't be HTTP requests during the build stage.

OK, then I misunderstood. I will keep this proposal open. The proposed use case isn't convincing enough alone for this to be added to Hugo.

If someone asked me how to Integrate Kroki with Hugo, I would agree with @jmooring and say that the best/recommended way would be to do POST request during builds.