Function fetchBuffer

packages/cli/src/capture/assetDownloader.ts:366–383

(url: string)

}

async function fetchBuffer(url: string): Promise<Buffer | null> {
  try {
    const res = await safeFetch(url, {
      signal: AbortSignal.timeout(10000),
      headers: { "User-Agent": "HyperFrames/1.0" },
    });
    if (!res || !res.ok) return null;
    // Reject XML/HTML error pages disguised as 200 OK (common with S3/CloudFront)
    const ct = res.headers.get("content-type") || "";
    if (ct.includes("text/xml") || ct.includes("text/html") || ct.includes("application/xml")) {
      return null;
    }
    const ab = await res.arrayBuffer();
    return Buffer.from(ab);
  } catch {
    return null;
  }
}

function slugify(text: string): string {
  return text