import com.google.common.annotations.GwtIncompatible;
import com.google.common.annotations.J2ktIncompatible;
import com.google.common.annotations.VisibleForTesting;
import java.util.Collection;
import java.util.Collections;
import java.util.Comparator;
import java.util.Iterator;
import java.util.NoSuchElementException;
import java.util.Set;
import org.jspecify.annotations.Nullable;

/**

 */
fun interface Dns {
  /**
   * Returns the IP addresses of `hostname`, in the order they will be attempted by OkHttp. If a
   * connection to an address fails, OkHttp will retry the connection with the next address until
   * either a connection is made, the set of IP addresses is exhausted, or a limit is exceeded.
   */
  @Throws(UnknownHostException::class)
  fun lookup(hostname: String): List<InetAddress>

        when(mockConfig.getDfsTtl()).thenReturn(300L);

        // Mock transport to throw IOException - simulating connection failure
        when(mockTransportPool.getSmbTransport(any(CIFSContext.class), anyString(), anyInt(), anyBoolean(), anyBoolean()))
                .thenThrow(new IOException("Connection failed"));

        // Instantiate the class under test
        dfsImpl = new DfsImpl(mockContext);
    }

  <!-- 5 inherited urls with ../${project.artifactId} added to parent -->
  <url>http://www.apache.org/path/to/parent/../child-artifact-id/</url>
  <scm>
    <connection>scm:my-scm:http://domain.org/base/../child-artifact-id</connection>
    <developerConnection>scm:my-scm:https://domain.org/base/../child-artifact-id/</developerConnection>
    <url>https://domain.org/base/../child-artifact-id</url>
  </scm>

import org.gradle.internal.os.OperatingSystem
plugins {
  kotlin("jvm")
  id("okhttp.jvm-conventions")
  id("okhttp.quality-conventions")
  id("okhttp.testing-conventions")
}

dependencies {
  api(libs.square.okio)
  api(projects.mockwebserver3)
  "friendsApi"(projects.okhttp)
  api(projects.okhttpTls)
  api(libs.assertk)
  api(libs.bouncycastle.bcprov)
  implementation(libs.bouncycastle.bcpkix)
  implementation(libs.bouncycastle.bctls)

 *
 * <p>For example, to test {@link java.util.Collections#unmodifiableList(java.util.List)
 * Collections.unmodifiableList}'s iterator:
 *
 * {@snippet :
 * List<String> expectedElements = Arrays.asList("a", "b", "c", "d", "e");
 * List<String> actualElements =
 *     Collections.unmodifiableList(Arrays.asList("a", "b", "c", "d", "e"));
 * IteratorTester<String> iteratorTester =

    platform.assumeNotBouncyCastle()

    enableTls(Protocol.HTTP_1_1)
    upgrade()
  }

  @Test
  fun upgradeRefusedByServer() {
    server.enqueue(MockResponse(body = "normal request"))
    val requestWithUpgrade =
      Request
        .Builder()
        .url(server.url("/"))
        .header("Connection", "upgrade")
        .build()

        // Test constructor with different exception types as cause
        String message = "SSO process failed";

        // Test with IOException
        Exception ioException = new java.io.IOException("Connection refused");
        SsoProcessException exception1 = new SsoProcessException(message, ioException);
        assertEquals(ioException, exception1.getCause());

        // Test with IllegalArgumentException

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

plugins {
  kotlin("jvm")
  id("okhttp.publish-conventions")
  id("okhttp.jvm-conventions")
  id("okhttp.quality-conventions")
  id("okhttp.testing-conventions")
}

project.applyOsgi(
  "Fragment-Host: com.squareup.okhttp3; bundle-version=\"\${range;[==,+);\${version_cleanup;${projects.okhttp.version}}}\"",
  "Bundle-SymbolicName: com.squareup.okhttp3.urlconnection",
  "-removeheaders: Private-Package",
)