Easy way to set cache control and public read permissions on all files in an S3 bucket (in Ruby)

setheaders.rb

AWS::S3::Base.establish_connection!(
  :access_key_id     => "YOUR KEY ID",
  :secret_access_key => "YOUR ACCESS KEY"
)

finished = false
lastkey = nil

while(!finished) 
  objects = AWS::S3::Bucket.objects('YOUR BUCKET NAME', :marker => lastkey)
  objects.each do |object|
    puts "Setting #{object.key}"
    object.cache_control = 'max-age=315360000'
    object.save({:access => :public_read})
  end
  if(objects.size == 1000) 
    lastkey = objects.last.key
  else
    finished = true
  end
end