```
OkHttpDebugLogging.enableHttp2()
OkHttpDebugLogging.enableTaskRunner()
```

### Activating on Android

```
$ adb shell setprop log.tag.okhttp.Http2 DEBUG
$ adb shell setprop log.tag.okhttp.TaskRunner DEBUG
$ adb logcat '*:E' 'okhttp.Http2:D' 'okhttp.TaskRunner:D'
```

### HTTP/2 Frame Logging

This logs inbound (`<<`) and outbound (`>>`) frames for HTTP/2 connections.

```

package okhttp3

import assertk.assertThat
import assertk.assertions.isEqualTo
import okhttp3.Headers.Companion.headersOf
import okhttp3.TestUtil.headerEntries
import okhttp3.internal.http2.Http2ExchangeCodec.Companion.http2HeadersList
import okhttp3.internal.http2.Http2ExchangeCodec.Companion.readHttp2HeadersList
import org.junit.jupiter.api.Test

class HeadersRequestTest {
  @Test fun readNameValueBlockDropsForbiddenHeadersHttp2() {

    applicationLogs
      .assertLogEqual("--> GET $url")
      .assertLogMatch(Regex("""<-- HTTP FAILED: java.net.UnknownHostException: reason. $url \(\d+ms\)"""))
      .assertNoMoreLogs()
  }

  @Test
  fun http2() {
    server.useHttps(handshakeCertificates.sslSocketFactory())
    url = server.url("/")
    setLevel(Level.BASIC)
    server.enqueue(MockResponse())
    val response = client.newCall(request().build()).execute()

 * 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 okhttp3.internal.http2

import java.io.IOException

/** Thrown when an HTTP/2 stream is canceled without damage to the socket that carries it. */
class StreamResetException(
  @JvmField val errorCode: ErrorCode,

 * 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 okhttp3.internal.http2

import java.io.IOException

/**
 * Thrown when an HTTP/2 connection is shutdown (either explicitly or if the peer has sent a GOAWAY
 * frame) and an attempt is made to use the connection.
 */

  exports okhttp3.internal.connection to mockwebserver3, okhttp3.mockwebserver, okhttp3.logging;
  exports okhttp3.internal.http to okhttp3.logging, okhttp3.brotli, mockwebserver3;
  exports okhttp3.internal.http2 to mockwebserver3, okhttp3.mockwebserver;
  exports okhttp3.internal.platform to okhttp3.logging, okhttp3.java.net.cookiejar, okhttp3.dnsoverhttps, mockwebserver3, okhttp3.mockwebserver, okhttp3.tls;

 * 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 okhttp3.internal.http2.hpackjson

/**
 * Representation of one story, a set of request headers to encode or decode. This class is used
 * reflectively with Moshi to parse stories from files.
 */
data class Story(

 * 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 okhttp3.internal.http2

import assertk.fail
import okio.BufferedSource
import okio.ByteString

internal open class BaseTestHandler : Http2Reader.Handler {
  override fun data(
    inFinished: Boolean,
    streamId: Int,

 * 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 okhttp3.internal.http2.flowcontrol

class WindowCounter(
  val streamId: Int,
) {
  /** The total number of bytes consumed. */
  var total: Long = 0L
    private set

 * 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 okhttp3.internal.http2

import okio.ByteString
import okio.ByteString.Companion.encodeUtf8

/** HTTP header: the name is an ASCII string, but the value can be UTF-8. */
data class Header(
  /** Name in case-insensitive ASCII encoding. */