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()

public final class AccessHeaders {
  private final OkHttpClient client = new OkHttpClient();

  public void run() throws Exception {
    Request request = new 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();

=== ":material-language-kotlin: Kotlin"
    ```kotlin
      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")

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// LCube - Professional hosting e.K. : https://www.lcube-webhosting.de
// Submitted by Lars Laehn <******@****.***>
git-repos.de
lcube-server.de
svn-repos.de

// Leadpages : https://www.leadpages.net
// Submitted by Greg Dallavalle <******@****.***>
leadpages.co
lpages.co
lpusercontent.com

2F86          ; mapped                 ; 820C          # 3.0  KANGXI RADICAL TONGUE
2F87          ; mapped                 ; 821B          # 3.0  KANGXI RADICAL OPPOSE
2F88          ; mapped                 ; 821F          # 3.0  KANGXI RADICAL BOAT
2F89          ; mapped                 ; 826E          # 3.0  KANGXI RADICAL STOPPING

    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