DeflateInterceptor.kt

class DeflateInterceptor : Interceptor {

    override fun intercept(chain: Interceptor.Chain): Response {
        val response = chain.proceed(chain.request())
        return inflate(response)
    }

    private fun inflate(response: Response): Response {
        val body = response.body ?: return response

        val contentEncoding = response.headers["Content-Encoding"]

        return if (contentEncoding != null && contentEncoding == "deflate") {
            val contentLength = body.contentLength()
            val inflaterSource = body.source().inflate(Inflater(true))
            val responseBody = RealResponseBody(
                body.contentType().toString(),
                contentLength,
                inflaterSource.buffer()
            )
            response.newBuilder()
                .body(responseBody)
                .build()

        } else response
    }
}