* the event source has already been closed or canceled.
   */
  fun cancel()

  fun interface Factory {
    /**
     * Creates a new event source and immediately returns it. Creating an event source initiates an
     * asynchronous process to connect the socket. Once that succeeds or fails, `listener` will be
     * notified. The caller must cancel the returned event source when it is no longer in use.
     */

 *  Upgrade: Build with Conscrypt 2.5.1.


## Version 4.8.1

_2020-08-06_

 *  Fix: Don't crash in `HeldCertificate.Builder` when creating certificates on older versions of
    Android, including Android 6. We were using a feature of `SimpleDateFormat` that wasn't
    available in those versions!


## Version 4.8.0

_2020-07-11_

    // We know that a fresh connection was created if the server recorded a request with sequence
    // number 0. Since the client may have attempted to reuse the broken connection just before
    // creating a fresh connection, the server may have recorded 2 requests at this point. The order
    // of recording is non-deterministic.
    val requestAfter = server.takeRequest()
    assertThat(

 */
package okhttp3

import java.io.IOException
import java.net.InetAddress
import java.net.Socket
import javax.net.SocketFactory

/**
 * A [SocketFactory] that delegates calls. Sockets can be configured after creation by
 * overriding [.configureSocket].
 */
open class DelegatingSocketFactory(private val delegate: SocketFactory) : SocketFactory() {
  @Throws(IOException::class)
  override fun createSocket(): Socket {

import java.net.InetAddress
import java.net.Socket
import javax.net.ssl.SSLSocket
import javax.net.ssl.SSLSocketFactory

/**
 * A [SSLSocketFactory] that delegates calls. Sockets can be configured after creation by
 * overriding [.configureSocket].
 */
open class DelegatingSSLSocketFactory(private val delegate: SSLSocketFactory) : SSLSocketFactory() {
  @Throws(IOException::class)
  override fun createSocket(): SSLSocket {

 * Fix: Honor read timeout when parsing SPDY headers.


## Version 1.2.1

_2013-08-23_

 * Resolve issue with 'jar-with-dependencies' artifact creation.
 * Fix: Support empty SPDY header values.


## Version 1.2.0

_2013-08-11_

 *  New APIs on OkHttpClient to set default timeouts for connect and read.
 *  Fix bug when caching SPDY responses.

import java.io.IOException
import java.net.InetAddress
import java.net.ServerSocket
import javax.net.ServerSocketFactory

/**
 * A [ServerSocketFactory] that delegates calls. Sockets can be configured after creation by
 * overriding [.configureServerSocket].
 */
open class DelegatingServerSocketFactory(private val delegate: ServerSocketFactory) : ServerSocketFactory() {
  @Throws(IOException::class)

    // System.setProperty("jdk.tls.client.enableSessionTicketExtension", "true")
    // System.setProperty("jdk.tls.server.enableSessionTicketExtension", "true")

    // IllegalStateException: Cannot resume session and session creation is disabled
    platform.assumeNotBouncyCastle()
  }

  @ParameterizedTest(name = "{displayName}({arguments})")
  @ValueSource(strings = ["TLSv1.2", "TLSv1.3"])
  @Flaky
  fun testSessionReuse(tlsVersion: String) {

This is necessary for bookkeeping when creating new streams. Correct framing requires that stream IDs are sequential on the socket, so we need to bundle assigning the ID with sending the `SYN_STREAM` frame.

## Connection Pool

 *     [chunked][newChunkedSource] or [unknown][newUnknownLengthSource].
 *  6. Read from and close that source.
 *
 * Exchanges that do not have a request body may skip creating and closing the request body.
 * Exchanges that do not have a response body can call
 * [newFixedLengthSource(0)][newFixedLengthSource] and may skip reading and closing that source.
 */
class Http1ExchangeCodec(