Logging HTTP API calls that are invoked by the FHIR Engine while syncing

[joiskash]

Is your feature request related to a problem? Please describe.
We have a requirement to log HTTP API calls. Logging is needed to analyze data packet size, time taken for API calls, failures etc.

Describe the solution you'd like
We would like to have an opening to pass an HTTPLoggingInterceptor to okHttpClient used by the FHIR engine.

Describe alternatives you've considered
No alternatives, open to suggestions.

[joiskash]

We have modified the RemoteFhirService.kt class by adding a custom HttpLoggingInterceptor that logs Http calls at the HttpLoggingInterceptor.Level.HEADERS .

      val customLogger =
        HttpLoggingInterceptor.Logger {
          try {
            writeToFile(fullFileName, it)
          } catch (exception: FileNotFoundException) {
            println("File not found")
          }
        }
      val logger = HttpLoggingInterceptor(customLogger)
      logger.level = HttpLoggingInterceptor.Level.HEADERS

      val client =
        OkHttpClient.Builder()
          .apply {
            connectTimeout(networkConfiguration.connectionTimeOut, TimeUnit.SECONDS)
            readTimeout(networkConfiguration.readTimeOut, TimeUnit.SECONDS)
            writeTimeout(networkConfiguration.writeTimeOut, TimeUnit.SECONDS)
            addInterceptor(logger)
            .
            .
            .

More details can be found here :

https://github.com/joiskash/android-fhir/blob/kj/fork-anc/engine/src/main/java/com/google/android/fhir/sync/remote/RemoteFhirService.kt