REST Upload Bitstream with Angular

[kpet]

Hello,

I have a DSpace 6.3 installed on a linux machine, using tomcat 9, jre 1.8, ant 1.10 and maven 3.3.9.

I want to upload a bitstream through an angular frontend application using DSpace 6 REST API.

However, I am not quite sure what kind of data the API expects at the POST endpoint with url "/rest/items/{item uuid}/bitstreams".

Is it some kind of form data or is it a binary file directly?

Any help would be greatly appreciated!