Kotlin Android Retrofit 2.6.0 with coroutines error handling

Question

I am using Retrofit 2.6.0 with coroutines for my web service call. I am getting the API response properly with all response codes (success & error cases). My Issue is when I

Answer 1

An addition to Arthur Matsegor's answer:

In my case API returns to me an error message for bad requests. For this scenario, i need to catch error message on Catch function. I know, writing try/catch to Catch function looks like ugly but it's worked.

private suspend fun  handleRequest(requestFunc: suspend () -> T): Result {
    return try {
        Result.success(requestFunc.invoke())
    } catch (httpException: HttpException) {
        val errorMessage = getErrorMessageFromGenericResponse(httpException)
        if (errorMessage.isNullOrBlank()) {
            Result.failure(httpException)
        } else {
            Result.failure(Throwable(errorMessage))
        }
    }
}

private fun getErrorMessageFromGenericResponse(httpException: HttpException): String? {
    var errorMessage: String? = null
    try {
        val body = httpException.response()?.errorBody()
        val adapter = Gson().getAdapter(GenericResponse::class.java)
        val errorParser = adapter.fromJson(body?.string())
        errorMessage = errorParser.errorMessage?.get(0)
    } catch (e: IOException) {
        e.printStackTrace()
    } finally {
        return errorMessage
    }
}