## Version 3.13.0

_2019-02-04_

 *  **This release bumps our minimum requirements to Java 8+ or Android 5+.** Cutting off old
    devices is a serious change and we don't do it lightly! [This post][require_android_5] explains
    why we're doing this and how to upgrade.

    The OkHttp 3.12.x branch will be our long-term branch for Android 2.3+ (API level 9+) and Java

 */
class OpenJSSEPlatform private constructor() : Platform() {
  private val provider: Provider = org.openjsse.net.ssl.OpenJSSE()

  // Selects TLSv1.3 so we are specific about our intended version ranges (not just 1.3)
  // and because it's a common pattern for VMs to have differences between supported and
  // defaulted versions for TLS based on what is requested.

@JvmField
internal val EMPTY_REQUEST: RequestBody = commonEmptyRequestBody

@JvmField
internal val EMPTY_RESPONSE: ResponseBody = commonEmptyResponse

/** GMT and UTC are equivalent for our purposes. */
@JvmField
internal val UTC: TimeZone = TimeZone.getTimeZone("GMT")!!

internal fun threadFactory(
  name: String,
  daemon: Boolean,
): ThreadFactory =
  ThreadFactory { runnable ->

  }

  @Test
  fun clientCloseCancelsConnectionAfterTimeout() {
    client.webSocket!!.close(1000, "Hello!")
    taskFaker.runTasks()
    // Note: we don't process server frames so our client 'close' doesn't receive a server 'close'.
    assertThat(client.canceled).isFalse()

    taskFaker.advanceUntil(ns(RealWebSocket.CANCEL_AFTER_CLOSE_MILLIS - 1))
    assertThat(client.canceled).isFalse()

### [Fast Fallback](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-ok-http-client/-builder/fast-fallback/)

Since version 5.0, `OkHttpClient` supports fast fallback, which is our implementation of Happy Eyeballs [RFC 6555](https://datatracker.ietf.org/doc/html/rfc6555).

   it throws an `InterruptedIOException`.

## Version 1.5.2

_2014-03-17_

 * Fix bug where deleting a file that was absent from the `HttpResponseCache`
   caused an IOException.
 * Fix bug in HTTP/2 where our HPACK decoder wasn't emitting entries in
   certain eviction scenarios, leading to dropped response headers.

## Version 1.5.1

_2014-03-11_

 * Fix 1.5.0 regression where connections should not have been recycled.

  }

  /**
   * Test to ensure we don't  throw a read timeout on responses that are progressing.  For this
   * case, we take a 4KiB body and throttle it to 1KiB/second.  We set the read timeout to two
   * seconds.  If our implementation is acting correctly, it will not throw, as it is progressing.
   */
  @ParameterizedTest
  @ArgumentsSource(ProtocolParamProvider::class)
  fun readTimeoutMoreGranularThanBodySize(
    protocol: Protocol,

import okhttp3.testing.PlatformRule
import okhttp3.tls.HeldCertificate
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

/**
 * Tests for our hostname verifier. Most of these tests are from AOSP, which itself includes tests
 * from the Apache HTTP Client test suite.
 */
class HostnameVerifierTest {
  private val verifier = OkHostnameVerifier

  @RegisterExtension

release has many critical bug fixes and is safe to run in production. We're eager to stabilize our
new APIs so we can get out of alpha.

 *  New: Support Java 21's virtual threads (‘OpenJDK Project Loom’). We changed OkHttp's internals
    to use `Lock` and `Condition` instead of `synchronized` for best resource utilization.

Security.insertProviderAt(Conscrypt.newProvider(), 1);
```

The OkHttp `3.12.x` branch supports Android 2.3+ (API level 9+) and Java 7+. These platforms lack
support for TLS 1.2 and should not be used.


Releases
--------

Our [change log][changelog] has release history.

The latest release is available on [Maven Central](https://search.maven.org/artifact/com.squareup.okhttp3/okhttp/4.12.0/jar).

```kotlin