.build()

        client.newCall(request).execute().use { response ->
          if (!response.isSuccessful) throw IOException("Unexpected code $response")

          for (certificate in response.handshake!!.peerCertificates) {
            println(CertificatePinner.pin(certificate))
          }
        }
      }
    ```
=== ":material-language-java: Java"
    ```java

     * 3
     * Content-Type: image/png
     * Content-Length: 100
     * Cache-Control: max-age=600
     *
     * AES_256_WITH_MD5
     * 2
     * base64-encoded peerCertificate[0]
     * base64-encoded peerCertificate[1]
     * -1
     * TLSv1.2
     * ```
     *
     * The file is newline separated. The first two lines are the URL and the request method. Next

    val cipherSuite = response1.handshake!!.cipherSuite
    val localCerts = response1.handshake!!.localCertificates
    val serverCerts = response1.handshake!!.peerCertificates
    val peerPrincipal = response1.handshake!!.peerPrincipal
    val localPrincipal = response1.handshake!!.localPrincipal
    val response2 = client.newCall(request).execute() // Cached!

    val response1 = client.newCall(request1).execute()
    val certificatePinnerBuilder = CertificatePinner.Builder()
    for (certificate in response1.handshake!!.peerCertificates) {
      certificatePinnerBuilder.add(
        server.hostName,
        pin(certificate),
      )
    }
    response1.body.close()