Hi! Anybody knows how could http headers be sent on a `window.fetch` call? I'm new to multiplatform ...

# webassembly

[Johann Fazakas]

Hi! Anybody knows how could http headers be sent on a window.fetch call? I'm new to multiplatform and wasm, I see there's a second init: RequesInit parameter on the fetch call, but I'm not sure how should I pass a mapOf<String, String>() to this object which seems to require some wasm JsAny? type for headers.
Of course, any other wasm ways/clients for http clients would also probably help me. window.fetch was just the only solution I found for this.

[Robert Jaros]

You can check how this is implemented in my project.
https://github.com/rjaros/kilua/blob/main/modules/kilua-rest/src/commonMain/kotlin/dev/kilua/rest/RestClient.kt#L307

[Robert Jaros]

Some helper functions and operators are defined here:
https://github.com/rjaros/kilua/blob/main/kilua/src/commonMain/kotlin/dev/kilua/externals/Object.kt

[Johann Fazakas]

Thank you! I see you have a complete http client here for js & wasm. Nice!

I tried to use just the essential parts and for some reason the backend service is still not receiving any header. I probably miss some silly thing. Here is a snippet of my code:

val requestInit = obj<RequestInit> {}
        requestInit.headers = obj()
        requestInit.headers!!["key"] = "value".toJsString()
        window.fetch("<http://localhost:8136/account/v1/personal-accounts>", requestInit)

Will continue playing with this next week. Have a great day!