// If the object ETag matches with the specified ETag.
			writeHeaders()
			writeErrorResponse(ctx, w, errorCodes.ToAPIErr(ErrPreconditionFailed), r.URL)
			return true
		}
	}

	etagMatch := opts.PreserveETag != "" && isETagEqual(objInfo.ETag, opts.PreserveETag)
	vidMatch := opts.VersionID != "" && opts.VersionID == objInfo.VersionID
	if etagMatch && vidMatch {
		writeHeaders()

            try (ServletOutputStream out = response.getOutputStream(); InputStream in = curlResponse.getContentAsStream()) {
                response.setStatus(curlResponse.getHttpStatusCode());
                writeHeaders(response);
                final String responseContentType = curlResponse.getHeaderValue("Content-Type");
                if (StringUtil.isBlank(responseContentType)) {

   * @param flushHeaders true to force flush the response headers. This should be true unless the
   *     response body exists and will be written immediately.
   */
  @Throws(IOException::class)
  fun writeHeaders(
    responseHeaders: List<Header>,
    outFinished: Boolean,
    flushHeaders: Boolean,
  ) {
    lock.assertNotHeld()

    var flushHeaders = flushHeaders
    this.withLock {

  fun pushPromise(
    streamId: Int,
    promisedStreamId: Int,
    requestHeaders: List<Header>,
  ) {
    this.withLock {
      if (closed) throw IOException("closed")
      hpackWriter.writeHeaders(requestHeaders)

      val byteCount = hpackBuffer.size
      val length = minOf(maxFrameSize - 4L, byteCount).toInt()
      frameHeader(
        streamId = streamId,
        length = length + 4,

      }
    }

    if (flushHeaders) {
      writer.flush()
    }

    return stream
  }

  @Throws(IOException::class)
  internal fun writeHeaders(
    streamId: Int,
    outFinished: Boolean,
    alternating: List<Header>,
  ) {
    writer.headers(outFinished, streamId, alternating)
  }

  /**