function classifyResponseStreaming(res) {
  if (!res.body) {
    return { isStreaming: false };
  }
  const contentType = res.headers.get("content-type") ?? "";
  const contentLength = res.headers.get("content-length");
  if (/^text\/event-stream\b/i.test(contentType) || /^application\/(x-)?ndjson\b/i.test(contentType) || /^application\/stream\+json\b/i.test(contentType) || /^text\/plain\b/i.test(contentType) && !contentLength) {
    return { isStreaming: true };
  }
  return { isStreaming: false };
}

export { classifyResponseStreaming };
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