*   // If this is preemptive auth, use a preemptive credential.
 *   if (challenge.scheme().equalsIgnoreCase("OkHttp-Preemptive")) {
 *     return response.request().newBuilder()
 *         .header("Proxy-Authorization", "secret")
 *         .build();
 *   }
 * }
 * return null; // Didn't find a preemptive auth scheme.
 * ```
 *
 * ## Reactive Authentication
 *

        .hostnameVerifier(hostnameVerifier)
        .build()
    val response =
      getResponse(
        Request.Builder()
          .url("https://android.com/foo".toHttpUrl())
          .header("Private", "Secret")
          .header("Proxy-Authorization", "bar")
          .header("User-Agent", "baz")
          .build(),
      )
    assertContent("encrypted response from the origin server", response)

    server.enqueue(MockResponse())
    val request =
      Request.Builder()
        .url(server.url("/"))
        .method("POST", body.toRequestBody(null))
        .build()
    val credential = basic("jesse", "secret")
    client =
      client.newBuilder()
        .authenticator(RecordingOkAuthenticator(credential, null))
        .build()
    val response = client.newCall(request).execute()

          message.startsWith("Found resumable session") -> Type.Handshake
          message.startsWith("Resuming session") -> Type.Handshake
          message.startsWith("Using PSK to derive early secret") -> Type.Handshake
          else -> Type.Unknown
        }

    override fun toString(): String {
      return if (param != null) {
        message + "\n" + param
      } else {
        message
      }

            return
          }

          // https://timothybasanov.com/2016/05/26/java-pre-master-secret.html
          // https://security.stackexchange.com/questions/35639/decrypting-tls-in-wireshark-when-using-dhe-rsa-ciphersuites
          // https://stackoverflow.com/questions/36240279/how-do-i-extract-the-pre-master-secret-using-an-openssl-based-client

          // TLSv1.2 Events
          // Produced ClientHello handshake message

   * test makes a single call with two duplex requests!
   */
  @Test
  fun duplexWithAuthChallenge() {
    enableProtocol(Protocol.HTTP_2)
    val credential = basic("jesse", "secret")
    client =
      client.newBuilder()
        .authenticator(RecordingOkAuthenticator(credential, null))
        .build()
    val body1 =
      MockStreamHandler()

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3298          ; mapped                 ; 52B4          # 1.1  CIRCLED IDEOGRAPH LABOR
3299          ; mapped                 ; 79D8          # 1.1  CIRCLED IDEOGRAPH SECRET
329A          ; mapped                 ; 7537          # 1.1  CIRCLED IDEOGRAPH MALE
329B          ; mapped                 ; 5973          # 1.1  CIRCLED IDEOGRAPH FEMALE