[Kotlin] unable to get access to OkHttpClient to enable http logging.

Description

The Java swagger client allows one to configure HTTP logging via an Api Configuration. The Kotlin client does not seem to allow this. The OkHttpClient instance is private to the ApiClient class.

Swagger-codegen version

2.3.1

Swagger declaration file content or url

This change is not directly related to API models.

Command line used for generation

This change is not directly related to API models.

Steps to reproduce

Not a bug. This is a feature request.

Related issues/PRs

Suggest a fix/enhancement

I have tested an experimental change here: https://github.com/swagger-api/swagger-codegen/compare/master...kgilmer:kotlin-logger

This replaces the static instance of the http client with a function that the client passes in which the http client is created. This allows clients to specify any desired configuration. However, I am not sure this is the best approach and would like feedback.

Start by reading the Kotlin ApiClient class where the private OkHttpClient instance is defined, then review the linked kotlin-logger comparison to understand the proposed injection approach. The change is done when Kotlin clients can configure HTTP logging or otherwise provide the desired HTTP client, with the approach validated against the existing generated-client behavior.