if (body != null) {
      assertThat(event.responseBody).isEqualTo(body)
    }
    assertThat(event.t.javaClass).isEqualTo(cls)
    assertThat(event.t.message).isEqualTo(message)
  }

  /** Expose this recorder as a frame callback and shim in "ping" events.  */
  fun asFrameCallback() =
    object : WebSocketReader.FrameCallback {
      override fun onReadMessage(text: String) {

Framing rules make it impractical to implement http/2 correctly on a single blocking thread. The flow-control features introduce feedback between reads and writes, requiring writes to acknowledge reads and reads to throttle writes.

In OkHttp we expose a blocking API over a framed protocol. This document explains the code and policy that makes that work.

### Threads

#### Application's calling thread

 * Fix: Locking bug in SpdyConnection.
 * Fix: Ignore null header values (for compatibility with HttpURLConnection).
 * Add URLStreamHandlerFactory support so that `URL.openConnection()` uses
   OkHttp.
 * Expose the transport ("http/1.1", "spdy/3", etc.) via magic request headers.
   Use `X-Android-Transports` to write the preferred transports and
   `X-Android-Selected-Transport` to read the negotiated transport.

 *  Fix: Update the stored timestamp on conditional cache hits.
 *  New: Optimized HTTP/2 request header encoding. More headers are HPACK-encoded and string
    literals are now Huffman-encoded.
 *  New: Expose `Part` headers and body in `Multipart`.
 *  New: Make `ResponseBody.string()` and `ResponseBody.charStream()` BOM-aware. If your HTTP
    response body begins with a [byte order mark][bom] it will be consumed and used to select a

    pongQueue.add(payload)
    runWriter()
    receivedPingCount++
  }

  @Synchronized override fun onReadPong(payload: ByteString) {
    // This API doesn't expose pings.
    receivedPongCount++
    awaitingPong = false
  }

  override fun onReadClose(
    code: Int,
    reason: String,
  ) {
    require(code != -1)

    synchronized(this) {

 * Prevent leaking a cache item's InputStreams when metadata read fails.
 * Use a string to identify TLS versions in routes.
 * Add frame logger for HTTP/2.
 * Replacing `httpMinorVersion` with `Protocol`. Expose HTTP/1.0 as a potential protocol.
 * Use `Protocol` to describe framing.
 * Implement write timeouts for HTTP/1.1 streams.
 * Avoid use of SPDY stream ID 1, as that's typically used for UPGRADE.

      }

    /**
     * Sets the socket factory used to secure HTTPS connections. If unset, the system default will
     * be used.
     *
     * @deprecated [SSLSocketFactory] does not expose its [X509TrustManager], which is a field that
     *     OkHttp needs to build a clean certificate chain. This method instead must use reflection
     *     to extract the trust manager. Applications should prefer to call

import okhttp3.OkHttpClient;
import okhttp3.Request;
import okhttp3.Response;
import okhttp3.ResponseBody;

public class OkHttpContributors {
  private static final String ENDPOINT = "https://api.github.com/repos/square/okhttp/contributors";
  private static final Moshi MOSHI = new Moshi.Builder().build();
  private static final JsonAdapter<List<Contributor>> CONTRIBUTORS_JSON_ADAPTER = MOSHI.adapter(

       has changed. That is the purpose of this normalization block.
   */
    ignore("okhttp3/osgi/workspace/cnf/repo/index.xml.gz")
    ignore("okhttp3/osgi/workspace/cnf/repo/index.xml.gz.sha")
  }
}

// Expose OSGi jars to the test environment.
val osgiTestDeploy: Configuration by configurations.creating

val copyOsgiTestDeployment by tasks.creating(Copy::class.java) {
  from(osgiTestDeploy)

import okhttp3.OkHttpClient
import okhttp3.Request

class AccessHeaders {
  private val client = OkHttpClient()

  fun run() {
    val request =
      Request.Builder()
        .url("https://api.github.com/repos/square/okhttp/issues")
        .header("User-Agent", "OkHttp Headers.java")
        .addHeader("Accept", "application/json; q=0.5")
        .addHeader("Accept", "application/vnd.github.v3+json")
        .build()