Ktor 2.0 issue: performing a POST in common code. On Android, I have the same code as before, where ...

# ktor

[tylerwilson]

Ktor 2.0 issue: performing a POST in common code. On Android, I have the same code as before, where I set the contentType in the url { headers { } } section. But running this same code on iOS, I get the following error:

"Header(s) [Content-Type] are controlled by the engine and cannot be set explicitly"

if I try to remove the contentType call on Android, then it fails with

java.lang.IllegalStateException: Fail to serialize body. Content has type: class MyRequest (Kotlin reflection is not available), but OutgoingContent expected.
If you expect serialized body, please check that you have installed the corresponding plugin(like `ContentNegotiation`) and set `Content-Type` header.

So it seems like we cannot do common code in this case. Anybody?

[e5l]

Hey, could you check if you have ContentNegotiation feature installed?

[tylerwilson]

I do:

private val client = HttpClient {
            install(ContentNegotiation) {
                json(parser)
            }

[tylerwilson]

where parser is:

internal val parser = Json { ignoreUnknownKeys = true; isLenient = true; useAlternativeNames = false; }

[e5l]

Could you file an issue with reproducer? I will take a look

[tylerwilson]

Okay, I was finally able to make a small sample that shows the issue: https://youtrack.jetbrains.com/issue/KTOR-3631 Side note: these templates in AS are not the greatest…

[tylerwilson]

I don’t suppose you might be able to take a look at this @e5l? I have tried a few things to work around it, but to no avail. Thank you!

[e5l]

I failed to reproduce it without simulator, so trying to do this with the sample

[tylerwilson]

So sorry, I just saw your work on the issue right after sending the above. Thanks!

[e5l]

No problem

[Amin Bahiraei]

Hi all Any update on that?

[e5l]

Sorry, still in investigation

[Amin Bahiraei]

Is exist any workaround till you fix the bug?

[e5l]

@Aleksei Tirman [JB] could you check?

[Aleksei Tirman [JB]]

The only workaround I see is to use Ktor 1.6.7.

[Amin Bahiraei]

I revert my code to 1.6.7 and it works like a charm.

[tylerwilson]

If this issue is not fixed, I do hope Ktor 1.6.7 will be compatible with Kotlin 1.6.20, or that there will be a 1.6.8 that will be. Thank you.