* both.
 *
 * Applications may configure OkHttp with an authenticator for origin servers, or proxy servers,
 * or both.
 *
 * ## Authentication Retries
 *
 * If your authentication may be flaky and requires retries you should apply some policy
 * to limit the retries by the class of errors and number of attempts.  To get the number of
 * attempts to the current point use this function.
 *
 * ```java

![Events Diagram](../assets/images/******@****.***)

### Events with Retries and Follow-Ups

OkHttp is resilient and can automatically recover from some connectivity failures. In this case, the `connectFailed()` event is not terminal and not followed by `callFailed()`. Event listeners will receive multiple events of the same type when retries are attempted.

**This release fixes a severe bug where OkHttp incorrectly detected and recovered from unhealthy
connections.** Stale or canceled connections were incorrectly attempted when they shouldn't have
been, leading to rare cases of infinite retries. Please upgrade to this release!

 *  Fix: don't return stale DNS entries in `DnsOverHttps`. We were caching DNS results indefinitely
    rather than the duration specified in the response's cache-control header.

  }

  private fun testRequestBodySurvivesRetries(transferKind: TransferKind) {
    server.enqueue(MockResponse(body = "abc"))

    // Use a misconfigured proxy to guarantee that the request is retried.
    client =
      client.newBuilder()
        .proxySelector(
          FakeProxySelector()
            .addProxy(server2.toProxyAddress())
            .addProxy(Proxy.NO_PROXY),
        )

 *
 * Unfortunately, older HTTPS servers refuse to connect when such options are presented. Rather than
 * avoiding these options entirely, this class allows a connection to be attempted with modern
 * options and then retried without them should the attempt fail.
 *
 * ## Connection Reuse
 *
 * Each connection can carry a varying number of streams, depending on the underlying protocol being

      fun run() {
        val request = Request.Builder()
            .url("http://publicobject.com/secrets/hellosecret.txt")
            .build()
      }
    ```

    To avoid making many retries when authentication isn't working, you can return null to give up. For example, you may want to skip the retry when these exact credentials have already been attempted:

    ```kotlin

acct.pro achi.nagano.jp aco act.au act.edu.au activetrail.biz actor ad ad.jp adachi.tokyo.jp adimo.co.uk adm.br adobeaemcloud.com adobeaemcloud.net adobeio-static.net adobeioruntime.net ads adult adult.ht adv.br adv.mz adygeya.ru adygeya.su ae ae.org aeg aejrie.no aero aero.mv aero.tt aerobatic.aero aeroclub.aero aerodrome.aero aeroport.fr aetna af affinitylottery.org.uk afjord.no afl africa africa.bj africa.com ag ag.it aga.niigata.jp agakhan agano.niigata.jp agdenes.no agematsu.nagano.jp agency agents.aero...

moåreke.no
midsund.no
midtre-gauldal.no
modalen.no
modum.no
molde.no
moskenes.no
moss.no
mosvik.no
malselv.no
målselv.no
malatvuopmi.no
málatvuopmi.no
namdalseid.no
aejrie.no
namsos.no
namsskogan.no
naamesjevuemie.no
nååmesjevuemie.no
laakesvuemie.no
nannestad.no
narvik.no
narviika.no
naustdal.no
nedre-eiker.no
nes.akershus.no
nes.buskerud.no

  /**
   * Returns the number of bytes required to encode these headers using HTTP/1.1. This is also the
   * approximate size of HTTP/2 headers before they are compressed with HPACK. This value is
   * intended to be used as a metric: smaller headers are more efficient to encode and transmit.
   */
  fun byteCount(): Long {
    // Each header name has 2 bytes of overhead for ': ' and every header value has 2 bytes of
    // overhead for '\r\n'.

        sslSocket.closeQuietly()
      }
    }
  }

  /**
   * To make an HTTPS connection over an HTTP proxy, send an unencrypted CONNECT request to create
   * the proxy connection. This may need to be retried if the proxy requires authorization.
   */
  @Throws(IOException::class)
  private fun createTunnel(): Request? {
    var nextRequest = tunnelRequest!!