Function doSendFileFD

lib/internal/http2/core.js:2799–2866

(session, options, fd, headers, streamOptions, err, stat)

}

function doSendFileFD(session, options, fd, headers, streamOptions, err, stat) {
  const onError = options.onError;

  if (err) {
    tryClose(fd);
    if (onError)
      onError(err);
    else
      this.destroy(err);
    return;
  }

  if (!stat.isFile()) {
    const isDirectory = stat.isDirectory();
    if (options.offset !== undefined || options.offset > 0 ||
        options.length !== undefined || options.length >= 0 ||
        isDirectory) {
      const err = isDirectory ?
        new ERR_HTTP2_SEND_FILE() : new ERR_HTTP2_SEND_FILE_NOSEEK();
      tryClose(fd);
      if (onError)
        onError(err);
      else
        this.destroy(err);
      return;
    }

    options.offset = -1;
    options.length = -1;
  }

  if (this.destroyed || this.closed) {
    tryClose(fd);
    this.destroy(new ERR_HTTP2_INVALID_STREAM());
    return;
  }

  const statOptions = {
    offset: options.offset !== undefined ? options.offset : 0,
    length: options.length !== undefined ? options.length : -1,
  };

  // options.statCheck is a user-provided function that can be used to
  // verify stat values, override or set headers, or even cancel the
  // response operation. If statCheck explicitly returns false, the
  // response is canceled. The user code may also send a separate type
  // of response so check again for the HEADERS_SENT flag
  if ((typeof options.statCheck === 'function' &&
       options.statCheck.call(this, stat, headers) === false) ||
       (this[kState].flags & STREAM_FLAGS_HEADERS_SENT)) {
    tryClose(fd);
    return;
  }

  if (stat.isFile()) {
    statOptions.length =
      statOptions.length < 0 ? stat.size - (+statOptions.offset) :
        MathMin(stat.size - (+statOptions.offset),