throw AssertionError("failed to set ALPN", e)
    } catch (e: IllegalAccessException) {
      throw AssertionError("failed to set ALPN", e)
    }
  }

  override fun afterHandshake(sslSocket: SSLSocket) {
    try {
      removeMethod.invoke(null, sslSocket)
    } catch (e: IllegalAccessException) {
      throw AssertionError("failed to remove ALPN", e)
    } catch (e: InvocationTargetException) {

    in 191..242 -> "8.1.13.v20181017"
    else -> null
  }

/**
 * Returns the alpn-boot version specific to this OpenJDK 8 JVM, or null if this is not a Java 8 VM.
 * 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
  }

 * Offer bridges to make it easier to migrate from OkHttp 1.x to OkHttp 2.0.
   This adds `OkUrlFactory`, `Cache`, and `@Deprecated` annotations for APIs
   dropped in 2.0.

## Version 1.5.4

_2014-04-14_

 * Drop ALPN support in Android. There's a concurrency bug in all
   currently-shipping versions.
 * Support asynchronous disconnects by breaking the socket only. This should

  ) {
    // No TLS extensions if the socket class is custom.
    if (matchesSocket(sslSocket)) {
      val bcSocket = sslSocket as BCSSLSocket

      val sslParameters = bcSocket.parameters

      // Enable ALPN.
      sslParameters.applicationProtocols = Platform.alpnProtocolNames(protocols).toTypedArray()

      bcSocket.parameters = sslParameters
    }
  }

  companion object {
    val factory =

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp.android.test.alpn

import android.os.Build
import android.util.Log
import assertk.assertThat
import assertk.assertions.isEqualTo
import javax.net.ssl.SSLSocket
import javax.net.ssl.SSLSocketFactory
import okhttp3.Call

  ) {
    // No TLS extensions if the socket class is custom.
    if (matchesSocket(sslSocket)) {
      // Enable session tickets.
      Conscrypt.setUseSessionTickets(sslSocket, true)

      // Enable ALPN.
      val names = Platform.alpnProtocolNames(protocols)
      Conscrypt.setApplicationProtocols(sslSocket, names.toTypedArray())
    }
  }

  companion object {
    val factory =

  ) {
    if (sslSocket is org.openjsse.javax.net.ssl.SSLSocket) {
      val sslParameters = sslSocket.sslParameters

      if (sslParameters is org.openjsse.javax.net.ssl.SSLParameters) {
        // Enable ALPN.
        val names = alpnProtocolNames(protocols)
        sslParameters.applicationProtocols = names.toTypedArray()

        sslSocket.sslParameters = sslParameters
      }
    } else {

    protocols: List<@JvmSuppressWildcards Protocol>,
  ) {
    if (Conscrypt.isConscrypt(sslSocket)) {
      // Enable session tickets.
      Conscrypt.setUseSessionTickets(sslSocket, true)

      // Enable ALPN.
      val names = alpnProtocolNames(protocols)
      Conscrypt.setApplicationProtocols(sslSocket, names.toTypedArray())
    } else {
      super.configureTlsExtensions(sslSocket, hostname, protocols)
    }
  }

 *
 *  * Server Name Indication (SNI) enables one IP address to negotiate secure connections for
 *    multiple domain names.
 *
 *  * Application Layer Protocol Negotiation (ALPN) enables the HTTPS port (443) to be used to
 *    negotiate HTTP/2.
 *
 * Unfortunately, older HTTPS servers refuse to connect when such options are presented. Rather than

problems. If your service has multiple IP addresses, OkHttp will attempt alternate addresses if the
first connect fails. This is necessary for IPv4+IPv6 and services hosted in redundant data
centers. OkHttp supports modern TLS features (TLS 1.3, ALPN, certificate pinning). It can be
configured to fall back for broad connectivity.

Using OkHttp is easy. Its request/response API is designed with fluent builders and immutability. It