### Events with Retries and Follow-Ups

OkHttp is resilient and can automatically recover from some connectivity failures. In this case, the `connectFailed()` event is not terminal and not followed by `callFailed()`. Event listeners will receive multiple events of the same type when retries are attempted.

 * save a small amount of file I/O and data copying.
 */
class Relay private constructor(
  /**
   * Read/write persistence of the upstream source and its metadata. Its layout is as follows:
   *
   *  * 16 bytes: either `OkHttp cache v1\n` if the persisted file is complete. This is another
   *    sequence of bytes if the file is incomplete and should not be used.
   *  * 8 bytes: *n*: upstream data size

    Get these strings with `HeldCertificate.certificatePem()` and `privateKeyPkcs8Pem()`.

 *  Fix: Handshake now returns peer certificates in canonical order: each certificate is signed by
    the certificate that follows and the last certificate is signed by a trusted root.

 *  Fix: Don't lose HTTP/2 flow control bytes when incoming data races with a stream close. If this
    happened enough then eventually the connection would stall.

    assertThat(request.headers["Accept-Encoding"]).isEqualTo("custom")
  }

  /**
   * Test a bug where gzip input streams weren't exhausting the input stream, which corrupted the
   * request that followed or prevented connection reuse. http://code.google.com/p/android/issues/detail?id=7059
   * http://code.google.com/p/android/issues/detail?id=38817
   */
  private fun testClientConfiguredGzipContentEncodingAndConnectionReuse(

 * and the last 7 bits from this byte.
 *
 * The end of the range is not encoded, but can be inferred by looking at the start of the range
 * that follows.
 *
 * b1
 * --
 *
 * This is either a mapping decision or the length of the mapped output, according to this table:
 *
 * ```
 *  0..63 : Length of the UTF-16 sequence that this range maps to. The offset is b2b3.

   *     DIRTY action should be followed by a CLEAN or REMOVE action. DIRTY lines without a matching
   *     CLEAN or REMOVE indicate that temporary files may need to be deleted.
   *
   *   o CLEAN lines track a cache entry that has been successfully published and may be read. A
   *     publish line is followed by the lengths of each of its values.
   *
   *   o READ lines track accesses for LRU.

   */
  open fun cacheMiss(call: Call) {
  }

  /**
   * Invoked when a response will be served from the cache or network based on validating the
   * cached Response freshness. Will be followed by cacheHit or cacheMiss after the network
   * Response is available.
   *
   * This event will only be received when a Cache is configured for the client.
   */
  open fun cacheConditionalHit(
    call: Call,

    val ping = peer.takeFrame()
    assertThat(ping.type).isEqualTo(Http2.TYPE_PING)
  }

  /**
   * A server RST_STREAM shouldn't prevent the client from consuming the response body, even if it
   * follows a truncated request body.
   */
  @Test fun clientRequestBodyServerResponseBodyRstStream() {
    // Write the mocking script.
    peer.sendFrame().settings(Settings())
    peer.acceptFrame() // ACK

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flickr

// flights : 2013-12-05 Binky Moon, LLC
flights

// flir : 2015-07-23 FLIR Systems, Inc.
flir

// florist : 2013-11-07 Binky Moon, LLC
florist

// flowers : 2014-10-09 XYZ.COM LLC
flowers

// fly : 2014-05-08 Charleston Road Registry Inc.
fly

// foo : 2014-01-23 Charleston Road Registry Inc.
foo

// food : 2016-04-21 Lifestyle Domain Holdings, Inc.
food