How to get a Image from a http url as https content

Using the Open Data Hub Image Proxy Functionality

URL: https://images.opendatahub.bz.it/api/Image/GetImageByUrl
Parameter: imageurl = original url of the image

Example (Image Icon of the Weather Service by the province):
https://images.opendatahub.bz.it/api/Image/GetImageByUrl?imageurl=http://daten.buergernetz.bz.it/services/weather/graphics/icons/imgsource/wetter/icon_2.png