Can't save image/png in node

[n-berilov]

For the following endpoint /documentModels/{modelId}/analyzeResults/{resultId}/figures/{figureId} image is not getting saved. Seems like some encoding problem because it works fine in postman.

Response body is types as Uint8Array, but it seems to be a string.

Part of the output when saving in node:

�PNG
�
���
IHDR���b���q��������l���	pHYs����������+����+�IDATx��{�Ue���h��eV��Y*%D�2�]�+���&X����a��.���K�4KJ�Z�0R�����EPI�LD2/deZ�%���q?

Part of output when using postman where image saved correctly:

�PNG
�
���
IHDR���b���q��������l���	pHYs����������+����+�IDATx��{�Ue���h��eV��Y*ȥD�2�]�+���&٘����a��.���K�4KJ�Z�0R�����EPI�LD2/deZ�%̜ߧ�q?

import DocumentIntelligence, {
  isUnexpected,
} from "@azure-rest/ai-document-intelligence";

  const client = DocumentIntelligence(
    endpoint,
    {
      key,
    },
    { apiVersion: "2024-07-31-preview" }
  );

const res = await client
    .path(
      "/documentModels/{modelId}/analyzeResults/{resultId}/figures/{figureId}",
      "prebuilt-layout",
      "2a5da62f-1101-4d7e-8b02-93904e34a0b6",
      "1.1"
    )
    .get();
  if (isUnexpected(res)) {
    throw res.body.error;
  }

  fs.writeFileSync("output.png", res.body, "binary");

Version: "@azure-rest/ai-document-intelligence": "1.0.0-beta.3"

[github-actions]

Thanks for the feedback! We are routing this to the appropriate team for follow-up. cc @ctstone @vkurpad.

[HarshaNalluru]

Thanks for logging the issue @n-berilov.
We're working on this already. Will keep you posted once we fix this.

[n-berilov]

Maybe related: #27748