value: String,
) = apply {
  headersCheckName(name)
  headersCheckValue(value, name)
  removeAll(name)
  commonAddLenient(name, value)
}

/** Equivalent to `build().get(name)`, but potentially faster. */
internal fun Headers.Builder.commonGet(name: String): String? {
  for (i in namesAndValues.size - 2 downTo 0 step 2) {
    if (name.equals(namesAndValues[i], ignoreCase = true)) {
      return namesAndValues[i + 1]

URLs that share the same address may also share the same underlying TCP socket connection. Sharing a connection has substantial performance benefits: lower latency, higher throughput (due to [TCP slow start](https://www.igvita.com/2011/10/20/faster-web-vs-tcp-slow-start/)) and conserved battery. OkHttp uses a [ConnectionPool](https://square.github.io/okhttp/4.x/okhttp/okhttp3/-connection-pool/) that automatically reuses HTTP/1.x connections and multiplexes HTTP/2 connections.

    // All other connections created will expire sooner
    routePlanner.defaultConnectionIdleAtNanos = expireSooner

    // Turn it into an http/2 connection that supports 5 concurrent streams
    // which can satisfy a larger policy
    val connection = routePlanner.plans.first().connection
    val http2Connection = connectHttp2(peer, connection, 5)
    setPolicy(pool, address, ConnectionPool.AddressPolicy(5))

    assertThat(hpackReader!!.getAndResetHeaderList()).isEqualTo(headerBlock)
  }

  /**
   * HPACK has a max header table size, which can be smaller than the max header message. Ensure the
   * larger header content is not lost.
   */
  @Test
  fun tooLargeToHPackIsStillEmitted() {
    bytesIn.writeByte(0x21) // Dynamic table size update (size = 1).
    bytesIn.writeByte(0x00) // Literal indexed

     * the web socket! It's possible that we're writing faster than the peer can read.
     */
    private const val MAX_QUEUE_SIZE = 16L * 1024 * 1024 // 16 MiB.

    /**
     * The maximum amount of time after the client calls [close] to wait for a graceful shutdown. If
     * the server doesn't respond the web socket will be canceled.
     */
    const val CANCEL_AFTER_CLOSE_MILLIS = 60L * 1000

    /**

  internal const val OPCODE_CONTROL_CLOSE = 0x8
  internal const val OPCODE_CONTROL_PING = 0x9
  internal const val OPCODE_CONTROL_PONG = 0xa

  /**
   * Maximum length of frame payload. Larger payloads, if supported by the frame type, can use the
   * special values [PAYLOAD_SHORT] or [PAYLOAD_LONG].
   */
  internal const val PAYLOAD_BYTE_MAX = 125L

  /** Maximum length of close message in bytes. */

 [conscrypt]: https://github.com/google/conscrypt/
 [get_example]: https://raw.github.com/square/okhttp/master/samples/guide/src/main/java/okhttp3/guide/GetExample.java
 [kotlin]: https://kotlinlang.org/
 [okhttp3_pro]: https://raw.githubusercontent.com/square/okhttp/master/okhttp/src/main/resources/META-INF/proguard/okhttp3.pro
 [okhttp_312x]: https://github.com/square/okhttp/tree/okhttp_3.12.x

    unexpected NPN response is received and OkHttp crashes.
 *  Fix: Write continuation frames when HPACK data is larger than 16383 bytes.
 *  Fix: Don't drop uncaught exceptions thrown in async calls.
 *  Fix: Throw an exception eagerly when a request body is not legal. Previously
    we ignored the problem at request-building time, only to crash later with a
    `NullPointerException`.

    receiving stream to process it.

    This change may increase OkHttp's memory use for applications that make many concurrent HTTP
    calls and that can receive data faster than they can process it. Previously, OkHttp limited
    HTTP/2 to 16 MiB of unacknowledged data per connection. With this fix there is a limit of 16 MiB
    of unacknowledged data per stream and no per-connection limit.

      /**
       * For whatever reason our BouncyCastle provider doesn't work with ECDSA keys. Just configure it
       * to use RSA-2048 instead.
       *
       * (We otherwise prefer ECDSA because it's faster.)
       */
      private val localhostHandshakeCertificatesWithRsa2048: HandshakeCertificates by lazy {
        val heldCertificate =
          HeldCertificate.Builder()
            .commonName("localhost")