// Close the raw socket so we don't end up doing synchronous I/O.
    rawSocket?.closeQuietly()
  }

  override fun socket(): Socket = socket!!

  /** Returns true if this connection is ready to host new streams. */
  fun isHealthy(doExtensiveChecks: Boolean): Boolean {
    lock.assertNotHeld()

    val nowNs = System.nanoTime()

    val rawSocket = this.rawSocket!!
    val socket = this.socket!!

 *  Fix: Don't call `EventListener.responseHeadersStart()` or `responseBodyStart()` until bytes have
    been received. Previously these events were incorrectly sent too early, when OkHttp was ready to
    read the response headers or body, which mislead tracing tools. Note that the `responseFailed()`
    event always used to follow one of these events; now it may be sent without them.

 *  New: Upgrade to Kotlin 1.3.61.

        sourcePos += bytesToRead
        return bytesToRead
      }

      // Read from upstream. This always reads a full buffer: that might be more than what the
      // current call to Source.read() has requested.
      try {
        val upstreamBytesRead = upstream!!.read(upstreamBuffer, bufferMaxSize)

        // If we've exhausted upstream, we're done.

   * a default value.
   *
   * If this does read a value, it starts with the tag and length, and reads an entire value,
   * including any potential composed values.
   *
   * If there's nothing to read and no default value, this will throw an exception.
   */
  fun fromDer(reader: DerReader): T

  fun fromDer(byteString: ByteString): T {

  private var outputByteCount = 0L

  fun wrapInput(source: Source): Source {
    return object : ForwardingSource(source) {
      override fun read(
        sink: Buffer,
        byteCount: Long,
      ): Long {
        val result = super.read(sink, byteCount)
        if (result == -1L) return result
        inputByteCount += result
        return result
      }
    }
  }

    val body = body("")
    val bytes = body.byteStream()
    assertThat(bytes.read()).isEqualTo(-1)
  }

  @Test
  fun byteStreamSeesBom() {
    val body = body("efbbbf68656c6c6f")
    val bytes = body.byteStream()
    assertThat(bytes.read()).isEqualTo(0xef)
    assertThat(bytes.read()).isEqualTo(0xbb)
    assertThat(bytes.read()).isEqualTo(0xbf)

    val derReader = DerReader(buffer)

    derReader.read("test") { header ->
      assertThat(header.tag).isEqualTo(16L)

      derReader.read("test") { header2 ->
        assertThat(header2.tag).isEqualTo(21L)
        assertThat(derReader.readOctetString()).isEqualTo("Smith".encodeUtf8())
      }

      derReader.read("test") { header3 ->
        assertThat(header3.tag).isEqualTo(1L)

  var b = addressOffset

  var i = pos
  while (i < limit) {
    if (b == address.size) return false // Too many groups.

    // Read a delimiter.
    if (b != addressOffset) {
      if (input[i] != '.') return false // Wrong delimiter.
      i++
    }

    // Read 1 or more decimal digits for a value in 0..255.
    var value = 0
    val groupOffset = i
    while (i < limit) {
      val c = input[i]

    require(length < bytesOut.size - lastFrame.start)

    // Move everything from bytesOut into a new buffer.
    val fullBuffer = Buffer()
    bytesOut.read(fullBuffer, bytesOut.size)

    // Copy back all but what we're truncating.
    fullBuffer.read(bytesOut, lastFrame.start + length)
    outFrames.add(OutFrame(lastFrame.sequence, lastFrame.start, true))
    return writer
  }

    val inputStream = response.body.byteStream()
    assertThat(inputStream.read().toChar()).isEqualTo('A')
    call.cancel()
    assertFailsWith<IOException> {
      // Reading 'B' may succeed if it's buffered.
      inputStream.read()

      // But 'C' shouldn't be buffered (the response is throttled) and this should fail.
      inputStream.read()
    }
    inputStream.close()
  }

  @Test