I have an issue when I try to provide Ktor’s `Http...

# multiplatform

[Dean Djermanović]

I have an issue when I try to provide Ktor’s HttpClient instance using Koin. Here’s my code:

single {
        val buildVariant: BuildVariant = get()
        val httpClientEngine: HttpClientEngine = get()
        val kotlinxSerializer: KotlinxSerializer = get()
        val tokenRefresher: TokenRefresher = get()

        HttpClient(httpClientEngine) {
            install(JsonFeature) {
                serializer = kotlinxSerializer
            }

            install(Logging) {
                ...
            }

            install(HttpSend) {
                intercept { clientCall, requestBuilder ->
                    ...

                    requestBuilder.takeFrom(clientCall.request)

                    val newAccessToken = tokenRefresher.refreshToken()
                    requestBuilder.setAuthorizationHeader(newAccessToken)
                    execute(requestBuilder)
                }
            }
        }
    }

The problem is in this line:

val newAccessToken = tokenRefresher.refreshToken()

I get kotlin.native.concurrent.InvalidMutabilityException: mutation attempt of frozen org.koin.core.scope.Scope

Can someone please explain why do I get this exception if I’m not trying to modify tokenRefresher? refreshToken is a suspending function, but for the debugging purposes, I made it a regular function which returns some string constant. The behavior is the same, I still get the same exception.

I’m using Ktor version 1.5.2

[Dean Djermanović]

Here’s my understanding so far. intercept lambda switches threads internally, freezes tokenRefresher and therefore the whole Scope. But since I don’t try to mutate tokenRefresher , I simply call a function on it, I don’t understand why the exception gets thrown.

[Jemo]

Try this

inline fun <reified T : Any> inject(): T {
    return GlobalContext.get().get()
}

val refresher: TokenRefresher = inject()

newAccessToken = refresher.refreshToken()

``````

[Dean Djermanović]

Can I access GlobalContext in the shared module?

[Jemo]

Yes

[Jemo]

Sorry not directly

[Jemo]

I have expect class

expect object Injector {
    inline fun <reified T : Any> inject(): T
}

[Dean Djermanović]

@Jemo Yes, this works. Can you please explain what was the problem and why this works?

[Jemo]

Maybe it will be helpful https://stackoverflow.com/questions/67241768/kotlin-multiplatform-illegalstateexception-must-be-main-thread