thread.start();
  }

  /**
   * This request body makes it possible for another thread to stream data to the uploading request.
   * This is potentially useful for posting live event streams like video capture. Callers should
   * write to {@code sink()} and close it to complete the post.
   */
  static final class PipeBody extends RequestBody {
    private final Pipe pipe = new Pipe(8192);

import okio.Buffer
import okio.BufferedSink
import okio.BufferedSource
import okio.Sink
import okio.Timeout
import okio.buffer
import okio.sink
import okio.source

/**
 * A scriptable web server. Callers supply canned responses and the server replays them upon request
 * in sequence.
 */
@ExperimentalOkHttpApi
class MockWebServer : Closeable {
  private val taskRunnerBackend =
    TaskRunner.RealBackend(

 *
 * This class is tolerant of some I/O errors. If files are missing from the filesystem, the
 * corresponding entries will be dropped from the cache. If an error occurs while writing a cache
 * value, the edit will fail silently. Callers should handle other problems by catching
 * `IOException` and responding appropriately.
 *
 * @constructor Create a cache which will reside in [directory]. This cache is lazily initialized on

  fun metadata(): ByteString = metadata

  /**
   * Returns a new source that returns the same bytes as upstream. Returns null if this relay has
   * been closed and no further sources are possible. In that case callers should retry after
   * building a new relay with [.read].
   */
  fun newSource(): Source? {
    synchronized(this@Relay) {
      if (file == null) return null
      sourceCount++
    }

   * project's build file due to the dependency resolution features of your build tool.
   *
   * [semver]: https://semver.org
   */
  @Suppress("MayBeConstant") // Non-const so external callers get the runtime version.
  @JvmField
  val VERSION = CONST_VERSION

    }

    /**
     * Sets the level and returns this.
     *
     * This was deprecated in OkHttp 4.0 in favor of the [level] val. In OkHttp 4.3 it is
     * un-deprecated because Java callers can't chain when assigning Kotlin vals. (The getter remains
     * deprecated).
     */
    fun setLevel(level: Level) =
      apply {
        this.level = level
      }

    @JvmName("-deprecated_level")

    to the uncaught exception handler for reporting and recovery.

 *  Fix: Un-deprecate `MockResponse.setHeaders()` and other setters. These were deprecated in OkHttp
    4.0 but that broke method chaining for Java callers.

 *  Fix: Don't crash on HTTP/2 HEAD requests when the `Content-Length` header is present but is not
    consistent with the length of the response body.

      .isEqualTo("http://host/?a=%21%24%28%29%2C%2F%3A%3B%3F%40%5B%5D%5C%5E%60%7B%7C%7D%7E")
    assertThat(url.queryParameter("a")).isEqualTo("!$(),/:;?@[]\\^`{|}~")
  }

  /**
   * When callers use `addEncodedQueryParameter()` we only encode what's strictly required. We
   * retain the encoded (or non-encoded) state of the input.
   */
  @Test
  fun queryCharactersNotReencodedWhenComposedWithAddEncoded() {

 * A cookie jar that delegates to a [java.net.CookieHandler].
 *
 * This implementation delegates everything to [okhttp3.java.net.cookiejar.JavaNetCookieJar], which
 * conforms to the package-naming limitations of JPMS.
 *
 * Callers should prefer to use [okhttp3.java.net.cookiejar.JavaNetCookieJar] directly.
 */
class JavaNetCookieJar private constructor(
  delegate: okhttp3.java.net.cookiejar.JavaNetCookieJar,
) : CookieJar by delegate {

OkHttp 3.x. You can use an OkHttp 4.x .jar file with applications or libraries built for OkHttp 3.x.

OkHttp is **not** source-compatible for Kotlin callers, but upgrading should be automatic thanks to
Kotlin’s powerful deprecation features. Most developers should be able to use IntelliJ’s _Code
Cleanup_ for a safe and fast upgrade.


Backwards-Incompatible Changes