Corrupted files after upload by Form-Data HTTP

[Ulf.Marxen]

Hello everybody,

I am struggling to upload images using the REST API v1 with the POST Create Attachment method.

We are using Azure Logic Apps to send an image as a form-data object. The upload works, and we receive a status code 200, with "mediaType": "image/jpeg" confirmed.

In Microsoft Logic Apps they send the posts in this format:

Create workflows that call external endpoints or other workflows - Azure Logic Apps | Microsoft Learn

The $content object is using base64toBinary function to convert the image. 

When I perform a GET Attachment request with the REST API v2, I get the response:

However, no image is displayed when I open the attachment in Confluence Cloud.

I also tried uploading the image via Postman as a form-data object. This image is displayed correctly.

Any idea whats wrong, or what I should try?

Thank you