ドメイン名の話はHTTPSに関する話のはるか前にありますが、すべてがドメインとIPアドレスに依存するため、ここで言及する価値があります。

///

### DNS { #dns }

では、実際のHTTPSの部分に注目してみましょう。

まず、ブラウザは**DNSサーバー**に**ドメインに対するIP**が何であるかを確認します。今回は、`someapp.example.com`とします。

DNSサーバーは、ブラウザに特定の**IPアドレス**を使用するように指示します。このIPアドレスは、DNSサーバーで設定した、あなたのサーバーが使用するパブリックIPアドレスになります。

<img src="/img/deployment/https/https01.drawio.svg">

### TLS Handshake の開始 { #tls-handshake-start }

ブラウザはIPアドレスと**ポート443**（HTTPSポート）で通信します。

	// and is 'true' when etcdConfig.PathPrefix is empty
	globalBucketFederation bool

	// Allocated DNS config wrapper over etcd client.
	globalDNSConfig dns.Store

	// GlobalKMS initialized KMS configuration
	GlobalKMS *kms.KMS

	// Common lock for various subsystems performing the leader tasks
	globalLeaderLock *sharedLock

	// Auto-Encryption, if enabled, turns any non-SSE-C request

	public final fun setMaxRequestsPerHost (I)V
}

public abstract interface class okhttp3/Dns {
	public static final field Companion Lokhttp3/Dns$Companion;
	public static final field SYSTEM Lokhttp3/Dns;
	public abstract fun lookup (Ljava/lang/String;)Ljava/util/List;
}

public final class okhttp3/Dns$Companion {
}

public abstract class okhttp3/EventListener {

java.net.Inet6Address#getHostAddress()
java.net.InetSocketAddress#toString()

@defaultMessage avoid DNS lookups by accident: if you have a valid reason, then @SuppressWarnings with that reason so its completely clear
java.net.InetAddress#getHostName()
java.net.InetAddress#getCanonicalHostName()

java.net.InetSocketAddress#getHostName() @ Use getHostString() instead, which avoids a DNS lookup

@defaultMessage Do not violate java's access system

	if s1.Checksum != s2.Checksum {
		return fmt.Errorf("Expected MinIO binary checksum: %s, seen: %s", s1.Checksum, s2.Checksum)
	}

	ns1 := s1.NEndpoints
	ns2 := s2.NEndpoints
	if ns1 != ns2 {
		return fmt.Errorf("Expected number of endpoints %d, seen %d", ns1, ns2)
	}

	for i, cmdLine := range s1.CmdLines {
		if cmdLine != s2.CmdLines[i] {
			return fmt.Errorf("Expected command line argument %s, seen %s", cmdLine,

    assertFalse(InetAddresses.isInetAddress("016.016.016.016"));
  }

  public void testForStringIPv4Input() throws UnknownHostException {
    String ipStr = "192.168.0.1";
    // Shouldn't hit DNS, because it's an IP string literal.
    InetAddress ipv4Addr = InetAddress.getByName(ipStr);
    assertThat(InetAddresses.forString(ipStr)).isEqualTo(ipv4Addr);
    assertTrue(InetAddresses.isInetAddress(ipStr));
  }

        in = new DatagramPacket(rcv_buf, RCV_BUF_SIZE);

        if (RO == null || RO.length() == 0) {

            /* No resolveOrder has been specified, use the
             * default which is LMHOSTS,DNS,WINS,BCAST
             * LMHOSTS,BCAST,DNS if jcifs.smb1.netbios.wins has not
             * been specified.
             */

            if (NbtAddress.getWINSAddress() == null) {
                resolveOrder = new int[2];

   */
  open fun proxySelectEnd(
    call: Call,
    url: HttpUrl,
    proxies: List<@JvmSuppressWildcards Proxy>,
  ) {
  }

  /**
   * Invoked just prior to a DNS lookup. See [Dns.lookup].
   *
   * This can be invoked more than 1 time for a single [Call]. For example, if the response to the
   * [Call.request] is a redirect to a different host.
   *

import java.net.Inet6Address
import java.net.InetAddress
import okhttp3.internal.interleave

/**
 * Implementation of HappyEyeballs Sorting Addresses.
 *
 * The current implementation does not address any of:
 *  - Async DNS split by IP class
 *  - Stateful handling of connectivity results
 *  - The prioritisation of addresses
 *
 * https://datatracker.ietf.org/doc/html/rfc8305#section-4
 */

 *
 */
public enum ResolverType {
    /**
     * Resolve using WINS server
     */
    RESOLVER_WINS,

    /**
     * NETBIOS broadcast
     */
    RESOLVER_BCAST,

    /**
     * DNS
     */
    RESOLVER_DNS,

    /**
     * LMHosts file lookup
     */
    RESOLVER_LMHOSTS