Copy a Remote File to S3 with Ruby

require 'net/http'

AWS::S3::Base.establish_connection!({
  access_key_id: 'your-access-key-id',
  secret_access_key: 'your-secret-access-key'
})

# Use the Google Logo as an example
#
url = URI("https://www.google.com/images/srpr/logo3w.png")

Net::HTTP.start(url.host) do |http|
  resp = http.get(url.path)
  AWS::S3::S3Object.store(File.basename(url.path), resp.body, 'yourbucketname', access: :public_read)
end