<ul data-eligibleForWebStory="true"><li>The article discusses the challenges faced while trying to mirror a curl -F snippet in pure Node.js for streamlining image moderation API uploads.</li><li>Using undici and the form-data package initially led to ConnectTimeoutError and DNS ENOTFOUND issues, despite curl working fine.</li><li>A workaround involved bypassing the resolver systemd-resolved and pointing to public DNS to resolve the API host.</li><li>After restarting systemd-resolved, both nslookup and the Node.js code managed to resolve the API host.</li><li>Attempts were made to rely on pure native APIs, but FormData.append in Undici only accepted string, Buffer, or Blob contents, resulting in errors.</li><li>The most reliable approach chosen in Node.js involved using a specific method to mirror curl -F, stream the file to avoid a memory hit, and generate valid multipart requests.</li></ul>

Streamlining Image Moderation API Uploads in Node.js: From Native Fetch to Form‑Data and DNS Fixes

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