Download file from S3 via HTTP

You need to have s3cmd installed. This command should return all your buckets

s3cmd ls 

First make the file you want to download be public accessible with command setacl

s3cmd setacl --acl-public s3://bucket-name/path-to-file/filname

 Then you can download from this path

http://bucket-name.s3.amazonaws.com/path-to-file/filename

(You can download with many connection in parallel with axel)

Don't forget to set permission back to private with

 s3cmd setacl --acl-private s3://bucket-name/path-to-file/filname

Credit:  a comment in s3tool.org