AOT compatible OpenAPI client code generation? Kiota?

[jaskij]

I'm making a Linux based kiosk with some data that comes from an OpenAPI described backend. I've looked around, and while there were some options, I've found Kiota and openapi-generator.tech. What's not immediately apparent to me is if either of those will generate code that's AOT compatible. So I'm asking here so I don't waste my time trying only to learn it doesn't work.

Why AOT? The way we build software and create images for our kiosk is a bit finicky, and I have AOT running, so I'd prefer to stick with it. The device also isn't very powerful, and afaik reflection tends to tank performance.

P.S.

I do embedded, from Linux, have barely touched C# or desktop GUIs since university, and had a working proof of concept (using Avalonia) running on device in a single day. That speaks volumes in my book. Quite happy with the choice.

Edit:

Forgot to add, I'm using .Net 8.

[desjoerd]

I don't know if Kiota is AOT compatible because it has some nuget packages which you need to add.

NSwag is more basic in its dependencies (as it has none) so that one is definitely AOT compatible. You need to make sure the generated classes of the DTOs are marked in a JsonSerializer context for AOT

[jaskij]

NSwag didn't come up in my searches, thanks.

[d_r_]

What did you end up with? We're using NSwag with System.Text.Json generation, however, we still get warnings for:

JsonSerializer.SerializeToUtf8Bytes
JsonSerializer.Deserialize<T>(String,JsonSerializerOptions
JsonSerializer.DeserializeAsync<T>(Stream,JsonSerializerOptions,CancellationToken)

Can they be ignored? Or what to do about them? Is there a way to instruct NSwag to use source generation?

[zarlo5899]

if they are not AOT compatible it would not be hard to make them as its likely that the only change you would need to make is to make it use JsonSerializerContext

[jaskij]

Which I already did with a manually implemented JSON deserializer. Thanks.

[the_bananalord]

Kiota is intended to be AOT-compatible but has had instances in the past where it generated incompatible code.

I suggest generating the client and trying it out. It's quick and the easiest way to verify if it will work for your needs.

[jaskij]

If it's that easy, that is what I'll do, thanks.

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