Download a binary file from a rest api in OIC

Summary:

Is there a way to download binary files from rest api to the OIC local storage for further processing ?

My Use case is, I have a rest API from where i would be getting binary files of different types, and i would like to download them into the OIC stage area and then zip them and send to other system. Currently i am using an opaque schema with bas64 encoding, so i convert the stream reference from API response to base64 and write the file as is, the issue is with OIC service limitation where for the encode and decode functions is limited to 10mb and the files can be bigger than that.