Content-Type: text/html
Content-Length: 193
Connection: keep-alive
Location: https://publicobject.com/helloworld.txt

INFO: Sending request https://publicobject.com/helloworld.txt on Connection{publicobject.com:443, proxy=DIRECT hostAddress=54.187.32.157 cipherSuite=TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA protocol=http/1.1}
User-Agent: OkHttp Example
Host: publicobject.com
Connection: Keep-Alive
Accept-Encoding: gzip

        Protocol protocol, IOException ioe) {
      printEvent("connectFailed");
    }

    @Override public void connectionAcquired(Call call, Connection connection) {
      printEvent("connectionAcquired");
    }

    @Override public void connectionReleased(Call call, Connection connection) {
      printEvent("connectionReleased");
    }

    @Override public void requestHeadersStart(Call call) {

 * limitations under the License.
 */
package okhttp3.internal

import okhttp3.Cache
import okhttp3.Dispatcher
import okhttp3.Response
import okhttp3.internal.connection.Exchange
import okhttp3.internal.connection.RealCall
import okhttp3.internal.connection.RealConnection
import okio.FileSystem
import okio.Path

internal fun buildCache(
  file: Path,
  maxSize: Long,
  fileSystem: FileSystem,
): Cache {

      object : EventListener() {
        var socket: SSLSocket? = null
        var closed = false

        override fun connectionAcquired(
          call: Call,
          connection: Connection,
        ) {
          socket = connection.socket() as SSLSocket
        }

        override fun requestHeadersStart(call: Call) {
          if (closed) {
            throw IOException("fake socket failure")
          }

  )

  override fun connectEnd(
    connection: Connection,
    route: Route,
    call: Call,
  ) {
    logEvent(ConnectionEvent.ConnectEnd(System.nanoTime(), connection, route, call))
  }

  override fun connectionClosed(connection: Connection) = logEvent(ConnectionEvent.ConnectionClosed(System.nanoTime(), connection))

  override fun connectionAcquired(
    connection: Connection,
    call: Call,
  ) {

                            http:
                              description: HTTP connection pool settings.
                              properties:
                                h2UpgradePolicy:
                                  description: |-
                                    Specify if http1.1 connection should be upgraded to http2 for the associated destination.

    clientListener.assertTextMessage("Hello, WebSockets!")
    closeWebSockets(webSocket, server)
  }

  /**
   * We had a bug where web socket connections were leaked if the HTTP connection upgrade was not
   * successful. This test confirms that connections are released back to the connection pool!
   * https://github.com/square/okhttp/issues/4258
   */
  @Test
  @Throws(Exception::class)
  fun webSocketConnectionIsReleased() {

After this, the client and the server have an **encrypted TCP connection**, this is what TLS provides. And then they can use that connection to start the actual **HTTP communication**.

And that's what **HTTPS** is, it's just plain **HTTP** inside a **secure TLS connection** instead of a pure (unencrypted) TCP connection.

/// tip

  }

  @Test
  fun staleConnectionNotReusedForNonIdempotentRequest() {
    // Capture the connection so that we can later make it stale.
    var connection: RealConnection? = null
    client =
      client.newBuilder()
        .addNetworkInterceptor(
          Interceptor { chain ->
            connection = chain.connection() as RealConnection
            chain.proceed(chain.request())
          },
        )

  <version>11-SNAPSHOT</version>
  <name>Model urls inheritance test child</name>

  <scm child.scm.connection.inherit.append.path="false"
       child.scm.developerConnection.inherit.append.path="false"
       child.scm.url.inherit.append.path="false">
    <connection>scm:my-scm:http://domain.org/base</connection>
    <developerConnection>scm:my-scm:https://domain.org/base/</developerConnection>
    <url>https://domain.org/override</url>