}

  /**
   * If the client closes the connection while it is consuming the response body, attempts to peek
   * or read the trailers should throw.
   *
   * This test needs to make two interventions to prevent OkHttp from reading the entire response
   * body, which it will attempt to do otherwise:
   *
   *  * Don't cache the response. The cache will try to read the entire response body so that it

        else -> localhost()
      }

    val isAndroid: Boolean
      get() = Platform.Companion.isAndroid

    companion object {
      const val PROPERTY_NAME = "okhttp.platform"
      const val CONSCRYPT_PROPERTY = "conscrypt"
      const val CORRETTO_PROPERTY = "corretto"
      const val JDK9_PROPERTY = "jdk9"
      const val JDK8_ALPN_PROPERTY = "jdk8alpn"

    if (predicate(i)) {
      if (result.isEmpty()) result = mutableListOf()
      (result as MutableList<T>).add(i)
    }
  }
  return result
}

internal const val USER_AGENT: String = "okhttp/${CONST_VERSION}"

internal fun checkOffsetAndCount(
  arrayLength: Long,
  offset: Long,
  count: Long,
) {
  if (offset or count < 0L || offset > arrayLength || arrayLength - offset < count) {

        initCause(e)
      }
    }

    // The following try/catch block is a pseudo hacky way to get around a crash on Android 7.0
    // More details:
    // https://github.com/square/okhttp/issues/3245
    // https://android-review.googlesource.com/#/c/271775/
    try {
      this.socket = rawSocket.asBufferedSocket()
    } catch (npe: NullPointerException) {
      if (npe.message == NPE_THROW_WITH_NULL) {

          // specifically received an instruction to retry without delay.
          return userResponse.request
        }

        return null
      }

      HTTP_MISDIRECTED_REQUEST -> {
        // OkHttp can coalesce HTTP/2 connections even if the domain names are different. See
        // RealConnection.isEligible(). If we attempted this and the server returned HTTP 421, then
        // we can retry on a different connection.

     * security. ECDSA keys are noticeably faster than RSA keys.
     *
     * This is the default configuration and has been since this API was introduced in OkHttp
     * 3.11.0. Note that the default may change in future releases.
     */
    fun ecdsa256() =
      apply {
        keyAlgorithm = "EC"
        keySize = 256
      }

    /**

import assertk.assertions.isNull
import okhttp3.internal.http.parseChallenges
import org.junit.jupiter.api.Disabled
import org.junit.jupiter.api.Test

class HeadersChallengesTest {
  /** See https://github.com/square/okhttp/issues/2780.  */
  @Test fun testDigestChallengeWithStrictRfc2617Header() {
    val headers =
      Headers
        .Builder()
        .add(
          "WWW-Authenticate",

      ioException.initCause(e)
      noMoreExchanges(ioException)
      responseCallback.onFailure(this@RealCall, ioException)
    }

    override fun run() {
      threadName("OkHttp ${redactedUrl()}") {
        var signalledCallback = false
        timeout.enter()
        try {
          val response = getResponseWithInterceptorChain()
          signalledCallback = true

    dns.assertRequests(uriHost)
    proxySelector.assertRequests() // No proxy selector requests!
  }

  /**
   * Don't call through to the proxy selector if we don't have a host name.
   * https://github.com/square/okhttp/issues/5770
   */
  @Test fun proxySelectorNotCalledForNullHost() {
    // The string '>' is okay in a hostname in HttpUrl, which does very light hostname validation.

   * particular, we set up this sequence of events:
   *
   *  1. take plan 0
   *  3. plan 0 connects
   *  4. finish taking plan 1
   *
   * https://github.com/square/okhttp/issues/7152
   */
  @Test
  fun reusePlanAndNewConnectRace() {
    val plan0 = routePlanner.addPlan()
    plan0.tcpConnectDelayNanos = 250.ms