*  Upgrade: [Okio 3.7.0][okio_3_7_0].


## Version 5.0.0-alpha.11

_2022-12-24_

 *  New: Enable fast fallback by default. It's our implementation of Happy Eyeballs,
    [RFC 8305][rfc_8305]. Disable with `OkHttpClient.Builder.fastFallback(false)`.
 *  Fix: Don't log response bodies for server-sent events.
 *  Fix: Skip early hints (status code 103) responses.

### [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).

With fast fallback, OkHttp attempts to connect to multiple web servers concurrently. It keeps whichever route connects first and cancels all of the others. Its rules are:

    val requestA = server.takeRequest()
    assertThat(requestA.sequenceNumber).isEqualTo(0)
    val requestB = server.takeRequest()
    assertThat(requestB.sequenceNumber).isEqualTo(1)
  }

  /**
   * The RFC is unclear in this regard as it only specifies that this should invalidate the cache
   * entry (if any).
   */
  @Test
  fun bodyPermittedOnDelete() {
    server.enqueue(MockResponse())
    val response =

import okhttp3.internal.publicsuffix.PublicSuffixDatabase
import okhttp3.internal.toCanonicalHost
import okhttp3.internal.trimSubstring
import org.codehaus.mojo.animal_sniffer.IgnoreJRERequirement

/**
 * An [RFC 6265](http://tools.ietf.org/html/rfc6265) Cookie.
 *
 * This class doesn't support additional attributes on cookies, like
 * [Chromium's Priority=HIGH extension][chromium_extension].
 *

/**
 * A Cache-Control header with cache directives from a server or client. These directives set policy
 * on what responses can be stored, and which requests can be satisfied by those stored responses.
 *
 * See [RFC 7234, 5.2](https://tools.ietf.org/html/rfc7234#section-5.2).
 */
class CacheControl internal constructor(
  /**
   * In a response, this field's name "no-cache" is misleading. It doesn't prevent us from caching

    message = "moved to val",
    replaceWith = ReplaceWith(expression = "priorResponse"),
    level = DeprecationLevel.ERROR,
  )
  fun priorResponse(): Response? = priorResponse

  /**
   * Returns the RFC 7235 authorization challenges appropriate for this response's code. If the
   * response code is 401 unauthorized, this returns the "WWW-Authenticate" challenges. If the

    // alternative subject starting with a japanese kanji character. This is
    // not supported by Android because the underlying implementation from
    // harmony follows the definition from rfc 1034 page 10 for alternative
    // subject names. This causes the code to drop all alternative subjects.
    assertThat(verifier.verify("bar.com", session)).isTrue()
    assertThat(verifier.verify("a.bar.com", session)).isFalse()

IDN Data
========

In order to implement Nameprep (RFC 3491), OkHttp uses Unicode tables specified in Stringprep
(RFC 3454). Fragments of this RFC are dumped into the files in this directory and parsed by
`StringprepTablesReader` into a model that can be used at runtime.

This format is chosen to make it easy to validate that these tables are consistent with the RFC.

```
cd okhttp/src/test/resources/okhttp3/internal/idn/

  }

  @Test
  @Throws(Exception::class)
  fun parseStandardFormats() {
    // RFC 822, updated by RFC 1123 with GMT.
    assertThat("Thu, 01 Jan 1970 00:00:00 GMT".toHttpDateOrNull()!!.time).isEqualTo(0L)
    assertThat("Fri, 06 Jun 2014 12:30:30 GMT".toHttpDateOrNull()!!.time).isEqualTo(1402057830000L)

    // RFC 850, obsoleted by RFC 1036 with GMT.
    assertThat("Thursday, 01-Jan-70 00:00:00 GMT".toHttpDateOrNull()!!.time).isEqualTo(0L)

   */
  HTTP_1_0("http/1.0"),

  /**
   * A plaintext framing that includes persistent connections.
   *
   * This version of OkHttp implements [RFC 7230][rfc_7230], and tracks revisions to that spec.
   *
   * [rfc_7230]: https://tools.ietf.org/html/rfc7230
   */
  HTTP_1_1("http/1.1"),

  /**
   * Chromium's binary-framed protocol that includes header compression, multiplexing multiple