Send file in base64

Hello! I need to send I file through API Rest. It needs to be Encoded in base64. How can I do this?
I have a file I uploaded to my server files and then send it through an API in base64.

Thanks!

Nobody?

We don’t support yet file uploading to API services.

Is it server side or client side?

Maybe @patrick can check it out

I’ve created it as Server side