dynamically change the host url

HostInterceptor.kt

@Singleton
class HostSelectionInterceptor : Interceptor {
    
    var host: String? = null
        set(value) {
            field = value?.toHttpUrlOrNull()?.host
        }

    @Throws(IOException::class)
    override fun intercept(chain: Interceptor.Chain): okhttp3.Response {
        var request = chain.request()
        val host = this.host
        if (host != null) {
            val newUrl = request.url.newBuilder().host(host).build()
            request = request.newBuilder().url(newUrl).build()
        }
        return chain.proceed(request)
    }
}

    @Singleton
    @Provides
    1. fun provideHostInterceptor(): HostSelectionInterceptor = HostSelectionInterceptor()
    
    2. addInterceptor(hostSelectionInterceptor)

    3. hostSelectionInterceptor.host = primarySmsUrl // updating value