private fun versionString(): String? {
      val prop = Properties()
      Main::class.java.getResourceAsStream("/okcurl-version.properties")?.use {
        prop.load(it)
      }
      return prop.getProperty("version", "dev")
    }

    private fun createInsecureTrustManager(): X509TrustManager =
      object : X509TrustManager {
        override fun checkClientTrusted(
          chain: Array<X509Certificate>,

    // This explicit check avoids activating in Android Studio with Android specific classes
    // available when running plugins inside the IDE.
    val isAndroid: Boolean
      get() = "Dalvik" == System.getProperty("java.vm.name")

    private val isConscryptPreferred: Boolean
      get() {
        val preferredProvider = Security.getProviders()[0].name
        return "Conscrypt" == preferredProvider
      }

      }

      init {
        val platformSystemProperty = getPlatformSystemProperty()

        if (platformSystemProperty == JDK9_PROPERTY) {
          if (System.getProperty("javax.net.debug") == null) {
            System.setProperty("javax.net.debug", "")
          }
        } else if (platformSystemProperty == CONSCRYPT_PROPERTY) {
          if (Security.getProviders()[0].name != "Conscrypt") {

  val UNREACHABLE_ADDRESS_IPV6 = InetSocketAddress("::ffff:198.51.100.1", 8080)

  /** See `org.graalvm.nativeimage.ImageInfo`. */
  @JvmStatic val isGraalVmImage = System.getProperty("org.graalvm.nativeimage.imagecode") != null

  @JvmStatic
  fun headerEntries(vararg elements: String?): List<Header> {
    return List(elements.size / 2) { Header(elements[it * 2]!!, elements[it * 2 + 1]!!) }
  }

    for (path in fileSystem.list(directory)) {
      deployFile(path)
    }
  }

  private fun RepositoryPlugin.deployClassPath() {
    val classpath = System.getProperty("java.class.path")
    val entries =
      classpath.split(File.pathSeparator.toRegex())
        .dropLastWhile { it.isEmpty() }
        .toTypedArray()
    for (classPathEntry in entries) {

      ): Call.Factory {
        System.setProperty("proxyHost", server.hostName)
        System.setProperty("proxyPort", server.port.toString())
        return client
      }
    },
    HTTP_PROXY_SYSTEM_PROPERTY {
      override fun connect(
        server: MockWebServer,
        client: OkHttpClient,
      ): Call.Factory {
        System.setProperty("http.proxyHost", server.hostName)

  @BeforeEach
  fun setUp(server: MockWebServer) {
    this.server = server

    // Default after JDK 14, but we are avoiding tests that assume special setup.
    // System.setProperty("jdk.tls.client.enableSessionTicketExtension", "true")
    // System.setProperty("jdk.tls.server.enableSessionTicketExtension", "true")

    // IllegalStateException: Cannot resume session and session creation is disabled
    platform.assumeNotBouncyCastle()
  }

    fun configureLogging(
      debug: Boolean,
      showHttp2Frames: Boolean,
      sslDebug: Boolean,
    ) {
      if (debug || showHttp2Frames || sslDebug) {
        if (sslDebug) {
          System.setProperty("javax.net.debug", "")
        }
        LogManager.getLogManager().reset()
        val handler =
          object : ConsoleHandler() {
            override fun publish(record: LogRecord) {

 * https://github.com/xjdr/xio/blob/master/alpn-boot.gradle
 */
fun alpnBootVersion(): String? {
  val version = System.getProperty("alpn.boot.version")

  if (version != null) {
    return version
  }

  val javaVersion = System.getProperty("java.version")
  val match = "1\\.8\\.0_(\\d+)(-.*)?".toRegex().find(javaVersion) ?: return null

      }
      else -> println(message)
    }
  }

  fun enableJsseDebugLogging(debugHandler: (JsseDebugMessage) -> Unit = this::quietDebug): Closeable {
    System.setProperty("javax.net.debug", "")
    return OkHttpDebugLogging.enable(
      "javax.net.ssl",
      object : Handler() {
        override fun publish(record: LogRecord) {