How to copy file across buckets using aws-s3 or aws-sdk gem in ruby on rails

Multiple images could easily be copied using aws-sdk gem as follows:

require 'aws-sdk'

image_names = ['one.jpg', 'two.jpg', 'three.jpg', 'four.jpg', 'five.png', 'six.jpg']
Aws.config.update({
    region: "destination_region", 
    credentials: Aws::Credentials.new('AWS_ACCESS_KEY_ID', 'AWS_SECRET_ACCESS_KEY')
})
image_names.each do |img|
    s3 = Aws::S3::Client.new()
    resp = s3.copy_object({
      bucket: "destinationation_bucket_name", 
      copy_source: URI.encode_www_form_component("/source_bucket_name/path/to/#{img}"), 
      key: "path/where/to/save/#{img}" 
    })      
end

If you have too many images, it is suggested to put the copying process in a background job.