the OkHttp version in custom `User-Agent` headers.

 *  Fix: Don't crash when running as a plugin in Android Studio Canary 4.1. To enable
    platform-specific TLS features OkHttp must detect whether it's running in a JVM or in Android.
    The upcoming Android Studio runs in a JVM but has classes from Android and that confused OkHttp!

 *  Fix: Include the header `Accept: text/event-stream` for SSE calls. This header is not added if

| ------- | ------------------- | -------------------------------------------- |
| 5.x     | ✅                  | APIs subject to change in alpha releases.    |
| 4.x     | ✅                  | Android 5.0+ (API level 21+) and on Java 8+. |
| 3.x     | ❌ Ended 2021-12-31 | Android 2.3+ (API level 9+) and Java 7+.     |


## Reporting a Vulnerability

Square recognizes the important contributions the security research community

import org.jspecify.annotations.Nullable;
import org.junit.Ignore;

/** Support class added to a suite as part of {@link FeatureSpecificTestSuiteBuilderTest}. */
/*
 * @Ignore affects the Android test runner (and only the Android test runner): It respects JUnit 4
 * annotations even on JUnit 3 tests.
 *
 * TODO(b/225350400): Remove @Ignore, which doesn't seem like it should be necessary and probably
 * soon won't be.
 */

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.android

import assertk.assertThat
import assertk.assertions.isEqualTo
import okhttp3.HttpUrl.Companion.toHttpUrl
import org.junit.Test

/**
 * Run with "./gradlew :android-test-app:connectedCheck -PandroidBuild=true" and make sure ANDROID_SDK_ROOT is set.
 */
class PublicSuffixDatabaseTest {
  @Test

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the

import com.google.common.annotations.GwtCompatible;
import java.lang.annotation.Retention;
import java.lang.annotation.Target;

/**
 * Signifies that a test should not be run under Android. This annotation is respected only by our
 * Google-internal Android suite generators. Note that those generators also suppress any test
 * annotated with LargeTest.
 *
 * <p>For more discussion, see {@linkplain com.google.common.base.AndroidIncompatible the

 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp.android.test

import java.util.concurrent.TimeUnit
import kotlin.test.assertEquals
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import okhttp3.ConnectionPool
import okhttp3.OkHttpClient

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

import javax.net.ssl.SSLSocket
import okhttp3.Protocol

/**
 * Deferred implementation of SocketAdapter that works by observing the socket
 * and initializing on first use.
 *
 * We use this because eager classpath checks cause confusion and excessive logging in Android,

 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.platform.android

import android.os.Build
import java.lang.reflect.InvocationTargetException
import java.lang.reflect.Method
import javax.net.ssl.SSLSocket
import okhttp3.Protocol
import okhttp3.internal.platform.AndroidPlatform

    return typeVariable;
  }

  /**
   * Invocation handler to work around a compatibility problem between Android and Java.
   *
   * <p>Java 8 introduced a new method {@code getAnnotatedBounds()} in the {@link TypeVariable}
   * interface, whose return type {@code AnnotatedType[]} is also new in Java 8. As of 2025, Android
   * has not added {@link AnnotatedType}. That means that we cannot implement that interface in