OIC integration to read a file provided as URL and consume it to BASE64?

Content

We have a source system which offers a REST service, returning some file as URL, we want integration to read the file content into BASE64 and upload the file into ERP Cloud. Is that viable?

I tried with using the URL as rest service, it works in POSTMAN but got nothing returned from OIC rest adapter.

Sample File url:

https://storage.procoretech-qa.com/v4/d/us-east-1/pro-core.com-staging/prostore/20200103194559_sandbox_monthly_a_2160985760.pdf?sig=7b8addfbf1ecb0588e3fa0729ab386afd84502323cbe60e86875af0c656fc223

Thanks

Gabriel