toWebResponse function

Response toWebResponse(Response response)

Converts an Aim Response into a web.Response.

Set-Cookie values joined with \n become separate headers. Bodies are streamed through a ReadableStream so SSE and large responses flow chunk by chunk. An empty body, or a status for which the Fetch spec forbids a body (101, 204, 205, 304), is sent as null; in the latter case the Dart body is still drained so any stream producer completes.

Implementation

web.Response toWebResponse(Response response) {
  final headers = web.Headers();
  response.headers.forEach((key, value) {
    if (key.toLowerCase() == 'set-cookie') {
      for (final cookie in value.split('\n')) {
        if (cookie.isNotEmpty) headers.append(key, cookie);
      }
    } else {
      headers.append(key, value);
    }
  });

  final init = web.ResponseInit(status: response.statusCode, headers: headers);
  final hasBody =
      response.body.contentLength != 0 &&
      !_nullBodyStatuses.contains(response.statusCode);
  if (!hasBody) {
    // Consume and discard the Dart body so stream producers complete.
    response.read().listen(null, cancelOnError: true).cancel();
    return web.Response(null, init);
  }
  return web.Response(_toReadableStream(response.read()), init);
}