Hello, My client doesn't print logs when I make re...

# multiplatform

[Jeff]

Hello, My client doesn't print logs when I make requests through my Android app. Any help would be appreciated.

I only get to see:

I/System.out: [OkHttp] sendRequest>>

The code is as follows:

private val client by lazy {
        HttpClient {
            install(JsonFeature) {
                serializer = KotlinxSerializer(
                    Json(
                        JsonConfiguration(
                            isLenient = true,
                            ignoreUnknownKeys = true
                        )
                    )
                )
            }
            install(Logging) {
                logger = Logger.DEFAULT
                level = LogLevel.ALL
            }
        }
    }

[saket]

I remember running into something similar. IIRC I put some debug breakpoints and found out that the current ktor logger was a no-op one.

[Jeff]

I don't seem to get you clearly @saket are you saying that the Logger doesn't work? How did you fix that?

[Kris Wong]

#ktor

[russhwolf]

Ktor's default JVM logger depends on slf4j so you need to add a compatible logger dependency separately. You could do that via logback-android, for example. https://github.com/tony19/logback-android

Easier however to define a custom logger like

install(Logging) {
    logger = object : Logger {
        override fun log(message: String) {
            Log.v(TAG, message)
        }
    }
}

[Jeff]

Thanks @russhwolf. The client code is on a shared module so I'm not sure how to go about it. It needs to work for other platforms too.

[russhwolf]

One way is expect val logger: Logger and implement per-platform. You can also use Logger.SIMPLE instead of Logger.DEFAULT in common which just uses println on all platforms.

[Jeff]

Final question:

Whats the advantage of using a library like Kermit as opposed to my own implementation like so:

### //JVM
actual fun logMessage(msg: String) {
    println(msg) ### //print the message to System.out
}

### // Android
actual fun logMessage(msg: String) {
    Log.d("AndroidApp", msg) ### //log the message to logcat
}

### // JS
actual fun logMessage(msg: String) {
    console.log(msg) // log the message to the browser console
}

### // iOS
actual fun logMessage(msg: Sring) {
    NSLog(msg) ### // log the message using NSLog
}

Does Kermit make the client logs more readable or something?

[russhwolf]

Kermit does some of that work for you, and it's structured in a way that its configuration is safe to freeze for multithreaded native use if you're configuring multiple loggers. Doesn't do anything special in terms of format. You probably don't need it if all you're doing is those simple actuals.

[Jeff]

Thanks