fun writeData(
    streamId: Int,
    outFinished: Boolean,
    buffer: Buffer?,
    byteCount: Long,
  ) {
    // Empty data frames are not flow-controlled.
    if (byteCount == 0L) {
      writer.data(outFinished, streamId, buffer, 0)
      return
    }

    var byteCount = byteCount
    while (byteCount > 0L) {
      var toWrite: Int
      withLock {
        try {

    internal var closed: Boolean = false

    @Throws(IOException::class)
    override fun read(
      sink: Buffer,
      byteCount: Long,
    ): Long {
      require(byteCount >= 0L) { "byteCount < 0: $byteCount" }

      while (true) {
        var tryAgain = false
        var readBytesDelivered = -1L
        var errorExceptionToDeliver: IOException? = null

      }
    }

    override fun read(
      sink: Buffer,
      byteCount: Long,
    ): Long {
      require(byteCount >= 0L) { "byteCount < 0: $byteCount" }
      check(!closed) { "closed" }
      if (bytesRemaining == 0L) return -1

      val read = super.read(sink, minOf(bytesRemaining, byteCount))
      if (read == -1L) {

    override fun write(
      source: Buffer,
      byteCount: Long,
    ) {
      check(!closed) { "closed" }
      if (contentLength != -1L && bytesReceived + byteCount > contentLength) {
        throw ProtocolException(
          "expected $contentLength bytes but received ${bytesReceived + byteCount}",
        )
      }
      try {
        super.write(source, byteCount)
        this.bytesReceived += byteCount

01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] responseBodyStart
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] responseBodyEnd: byteCount=128
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] connectionReleased
01-01 12:53:32.811 10999 11089 D OkHttp  : [49 ms] callEnd
01-01 12:53:32.816 10999 11090 D OkHttp  : [54 ms] responseHeadersStart

        private long totalBytesWritten = 0L;
        private boolean completed = false;

        @Override
        public void write(Buffer source, long byteCount) throws IOException {
          super.write(source, byteCount);
          totalBytesWritten += byteCount;
          progressListener.update(totalBytesWritten, contentLength(), completed);
        }

        @Override
        public void close() throws IOException {

  private val bytesPerPeriod: Long,
  private val periodDelayNanos: Long,
) : Sink by delegate {
  private var bytesWrittenSinceLastDelay = 0L

  override fun write(
    source: Buffer,
    byteCount: Long,
  ) {
    var bytesLeft = byteCount

    while (bytesLeft > 0) {
      if (bytesWrittenSinceLastDelay == bytesPerPeriod) {
        flush()
        socket.sleepWhileOpen(periodDelayNanos)
        bytesWrittenSinceLastDelay = 0

      .assertLogMatch(Regex("""requestBodyEnd: byteCount=6"""))
      .assertLogMatch(Regex("""responseHeadersStart"""))
      .assertLogMatch(Regex("""responseHeadersEnd: Response\{protocol=http/1\.1, code=200, message=OK, url=$url\}"""))
      .assertLogMatch(Regex("""responseBodyStart"""))
      .assertLogMatch(Regex("""responseBodyEnd: byteCount=0"""))
      .assertLogMatch(Regex("""connectionReleased"""))

  /**
   * Peeks up to [byteCount] bytes from the response body and returns them as a new response
   * body. If fewer than [byteCount] bytes are in the response body, the full response body is
   * returned. If more than [byteCount] bytes are in the response body, the returned value
   * will be truncated to [byteCount] bytes.
   *

          private var completed = false

          override fun write(
            source: Buffer,
            byteCount: Long,
          ) {
            super.write(source, byteCount)
            totalBytesWritten += byteCount
            progressListener.update(totalBytesWritten, contentLength(), completed)
          }

          override fun close() {
            super.close()