How to translate NSOutputStream to InputStream? - ios

Question

I try to write code for iOS to upload files via Ktor using Stream but I don't know how to connect iOS stream to Android streams or Kotlin cannels.
I use the below code for Android.
private suspend fun uploadFiles(
uriList: List<Uri>,
contentResolver: ContentResolver,
entity: String,
objectId: String
): Map<String, Boolean>? {
val inputStreamMap = mutableMapOf<String, InputStream>()
uriList.forEach {
val inputStream = contentResolver.openInputStream(it) ?: return#forEach
val fileName = contentResolver.query(
it, null, null, null, null
)?.run {
val displayNameIndex = getColumnIndex(OpenableColumns.DISPLAY_NAME)
moveToFirst()
val displayName = getString(displayNameIndex)
close()
displayName
} ?: return#forEach
inputStreamMap[fileName] = inputStream
}
val channels = inputStreamMap.mapValues {
object : OutgoingContent.WriteChannelContent() {
override suspend fun writeTo(channel: ByteWriteChannel) {
it.value.copyTo(channel.toOutputStream(), 1024)
}
override val contentType = ContentType.Application.OctetStream
override val contentLength: Long = it.value.available().toLong()
}
}
val result = useCases.uploadFiles(channels, entity, objectId)
inputStreamMap.values.forEach { it.close() }
return result
}