System.perspective.download Encoding

Ignition
11

I made the following attempts:

dataList.append(base64.b64encode(event.file.getBytes()))	

dataList.append(base64.b64decode(event.file.getBytes()))

dataList.append(base64.b64encode(event.file.getBytes()).encode('utf-8'))	

dataList.append(base64.b64encode(event.file.getBytes()).decode('utf-8'))

dataList.append(base64.b64decode(event.file.getBytes()).encode('utf-8'))

dataList.append(base64.b64decode(event.file.getBytes()).decode('utf-8'))

but none of them worked …