Problem Definition

Looking into downloading RAW files but need the files to have the header: "Last Modified", which is needed so an application can compare the header/date and make a decision if to download the file or not.

Suggested Solution

Having a "Last Modified" header in a raw download file. To exemplify better, the screenshot below shows a test downloading the headers of 2 raw files, one hosted in S3 and another hosted in a Bitbucket instance, and as we can see in the screenshot the headers in the S3 hosted file include the Last Modified header while the one in Bitbucket doesn't:

Workaround

The closest workaround is to use /rest/api/1.0/projects/<projectKey>/repos/<repositorySlug>/last-modified/ endpoint, but this endpoint will list all the file's attributes related to a commit. There isn't a rest endpoint that references a specific file from a repository.