adding headers to s3 bucket urls

Exploring ways of migrating our downloads site to an AWS S3 bucket, we would preferably need to add the equivalent of
  ForceType application/octet-stream
 Header set Content-Disposition attachment

to prevent the files from just playing in the browser instead of downloading.

Looks like we could programmatically add the "content-disposition attachment" header to each file uploaded (to a folder) on an S3 bucket using a technique explained here,

https://stackoverflow.com/questions/19508318/how-to-set-content-disposition-headers-as-a-default-on-amazon-s3-bucket/51751708