* See the License for the specific language governing permissions and
 * limitations under the License.
 */
package okhttp3.internal.http2

import okhttp3.internal.format
import okio.ByteString.Companion.encodeUtf8

object Http2 {
  @JvmField
  val CONNECTION_PREFACE = "PRI * HTTP/2.0\r\n\r\nSM\r\n\r\n".encodeUtf8()

  /** The initial max frame size, applied independently writing to, or reading from the peer. */

import okhttp3.internal.EMPTY_BYTE_ARRAY
import okhttp3.internal.http2.Http2.FLAG_COMPRESSED
import okhttp3.internal.http2.Http2.FLAG_END_HEADERS
import okhttp3.internal.http2.Http2.FLAG_END_STREAM
import okhttp3.internal.http2.Http2.FLAG_NONE
import okhttp3.internal.http2.Http2.FLAG_PADDED
import okhttp3.internal.http2.Http2.FLAG_PRIORITY
import okhttp3.internal.http2.Http2.TYPE_GOAWAY
import okio.Buffer
import okio.BufferedSink

    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_PING)
    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_HEADERS)
    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_PING)
    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_DATA)
    assertThat(peer.takeFrame().type).isEqualTo(Http2.TYPE_RST_STREAM)
  }

  @Test fun outgoingWritesAreBatched() {

HSPLokhttp3/internal/http2/Hpack;-><clinit>()V
HSPLokhttp3/internal/http2/Hpack;-><init>()V
HSPLokhttp3/internal/http2/Hpack;->checkLowercase(Lokio/ByteString;)Lokio/ByteString;
HSPLokhttp3/internal/http2/Http2;-><clinit>()V
HSPLokhttp3/internal/http2/Http2;-><init>()V
HSPLokhttp3/internal/http2/Http2Connection$Builder;-><init>(ZLokhttp3/internal/concurrent/TaskRunner;)V

      clearPrevious: Boolean,
      settings: Settings,
    ) {
      check(type == -1)
      this.type = Http2.TYPE_SETTINGS
      this.clearPrevious = clearPrevious
      this.settings = settings
    }

    override fun ackSettings() {
      check(type == -1)
      this.type = Http2.TYPE_SETTINGS
      this.ack = true
    }

    override fun headers(
      inFinished: Boolean,

import java.util.logging.LogRecord
import java.util.logging.Logger
import okhttp3.OkHttpClient
import okhttp3.internal.SuppressSignatureCheck
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.http2.Http2
import okhttp3.internal.platform.android.AndroidLog.androidLog

private val LogRecord.androidLevel: Int
  get() =
    when {
      level.intValue() > Level.INFO.intValue() -> Log.WARN

    assumeNotWindows()

    serverTruncatesRequestButTrailersCanStillBeRead(http2 = false)
  }

  @Test
  fun serverTruncatesRequestButTrailersCanStillBeReadHttp2() {
    enableProtocol(Protocol.HTTP_2)
    serverTruncatesRequestButTrailersCanStillBeRead(http2 = true)
  }

  private fun serverTruncatesRequestButTrailersCanStillBeRead(http2: Boolean) {
    val mockResponse =
      MockResponse
        .Builder()

          if (Thread.currentThread() != currentThread) {
            return
          }

          // https://timothybasanov.com/2016/05/26/java-pre-master-secret.html
          // https://security.stackexchange.com/questions/35639/decrypting-tls-in-wireshark-when-using-dhe-rsa-ciphersuites
          // https://stackoverflow.com/questions/36240279/how-do-i-extract-the-pre-master-secret-using-an-openssl-based-client

import kotlin.reflect.KClass
import okhttp3.internal.concurrent.TaskRunner
import okhttp3.internal.http2.Http2

object OkHttpDebugLogging {
  // Keep references to loggers to prevent their configuration from being GC'd.
  private val configuredLoggers = CopyOnWriteArraySet<Logger>()

  fun enableHttp2() = enable(Http2::class)

  fun enableTaskRunner() = enable(TaskRunner::class)

  fun logHandler() =

import java.util.logging.ConsoleHandler
import java.util.logging.Level
import java.util.logging.LogManager
import java.util.logging.LogRecord
import java.util.logging.Logger
import okhttp3.internal.http2.Http2

class LoggingUtil {
  companion object {
    private val activeLoggers = mutableListOf<Logger>()

    fun configureLogging(
      debug: Boolean,
      showHttp2Frames: Boolean,
      sslDebug: Boolean,