For example if your s3 bucket is being served behind CloudFront, it is common to set Cache-Control: max-age=300,public to reduce cache TTL, or setting Content-Encoding: gzip for pre-compressed files.

s3cmd has the --add-header parameters for this purpose

Backends which have and haven't got support for --header-upload and --header-download

Backends which are crossed out are not HTTP based and can't support the feature

• alias
• amazonclouddrive
• azureblob
• b2
• box
• cache
• chunker
• crypt
• drive
• dropbox
• fichier
• ftp
• googlecloudstorage
• googlephotos
• http
• hubic
• jottacloud
• koofr
• local
• mailru
• mega
• memory
• onedrive
• opendrive
• pcloud
• premiumizeme
• putio
• qingstor
• s3
• sftp
• sharefile
• sugarsync
• swift
• union
• webdav
• yandex