lifetime based on Response cache headers.

 - CallStart 
 - **CacheMiss**
 - ProxySelectStart
 - ... Standard Events ...
 - CallEnd
        
### Conditional Cache Hit
 
When cache flags require checking the cache results are still valid an early cacheConditionalHit event is
received followed by a cache hit or miss.  Critically in the cache hit scenario the server won’t send the response body.

    inputStream: InputStream,
    count: Int,
  ): String {
    val result = StringBuilder()
    for (i in 0 until count) {
      val value = inputStream.read()
      if (value == -1) {
        inputStream.close()
        break
      }
      result.append(value.toChar())
    }
    return result.toString()
  }

  @Test
  fun markAndResetWithContentLengthHeader() {

    assertThat(listener.recordedEventTypes().filter { it == "ConnectFailed" }).hasSize(0)
  }

  @Test
  fun callIpv6WhenBothServersAreReachable() {
    // Flip DNS results to prefer IPv6.
    dnsResults =
      listOf(
        localhostIpv6,
        localhostIpv4,
      )
    serverIpv4.enqueue(
      MockResponse(body = "unexpected call to IPv4"),
    )

   * If [nextPlan] is not-null, another attempt should be made by following it. If [throwable] is
   * non-null, it should be reported to the user should all further attempts fail.
   *
   * The two values are independent: results can contain both (recoverable error), neither
   * (success), just an exception (permanent failure), or just a plan (non-exceptional retry).
   */
  data class ConnectResult(
    val plan: Plan,

import java.net.InetAddress
import java.net.UnknownHostException
import okhttp3.Dns

/**
 * Internal Bootstrap DNS implementation for handling initial connection to DNS over HTTPS server.
 *
 * Returns hardcoded results for the known host.
 */
internal class BootstrapDns(
  private val dnsHostname: String,
  private val dnsServers: List<InetAddress>,
) : Dns {
  @Throws(UnknownHostException::class)

/**
 * Implementation of HappyEyeballs Sorting Addresses.
 *
 * The current implementation does not address any of:
 *  - Async DNS split by IP class
 *  - Stateful handling of connectivity results
 *  - The prioritisation of addresses
 *
 * https://datatracker.ietf.org/doc/html/rfc8305#section-4
 */
fun reorderForHappyEyeballs(addresses: List<InetAddress>): List<InetAddress> {
  if (addresses.size < 2) {

      val result = mutableListOf<List<AttributeTypeAndValue>>()

      if (organizationalUnit != null) {
        result +=
          listOf(
            AttributeTypeAndValue(
              type = ORGANIZATIONAL_UNIT_NAME,
              value = organizationalUnit,
            ),
          )
      }

      result +=
        listOf(
          AttributeTypeAndValue(

11:55:40 V/InstrumentationResultParser:
11:55:40 V/InstrumentationResultParser: OK (12 tests)
...
11:55:40 I/XmlResultReporter: XML test result file generated at /Users/myusername/workspace/okhttp/android-test/build/outputs/androidTest-results/connected/TEST-pixel3a-Q(AVD) - 10-android-test-.xml. Total tests 13, passed 11, assumption_failure 1, ignored 1,
...
BUILD SUCCESSFUL in 1m 30s

/**
 * DNS implementation based on android.net.DnsResolver, which submits a request for
 * A or AAAA records, and returns the addresses or exception.
 *
 * Two instances must be used to get all results for an address.
 *
 * @param network network to use, if not selects the default network.
 */
@RequiresApi(Build.VERSION_CODES.Q)
@ExperimentalOkHttpApi
class AndroidAsyncDns(
  private val dnsClass: AsyncDns.DnsClass,

    if (planToReplace != null) {
      nextRouteToTry = planToReplace.route
      planToReplace.closeQuietly()
    }

    connectionUser.connectionAcquired(result)
    connectionUser.connectionConnectionAcquired(result)
    return ReusePlan(result)
  }

  /** Returns a plan for the first attempt at [route]. This throws if no plan is possible. */
  @Throws(IOException::class)
  internal fun planConnectToRoute(