Get a recursive listing of all files at at a given Amazon S3 path

gistfile1.rb

  credentials = YAML.load_file("#{Rails.root}/config/s3.yml")
  @access_key = credentials[Rails.env]["access_key_id"]
  @secret_key = credentials[Rails.env]["secret_access_key"]
  @bucket = credentials[Rails.env]["bucket"]

  AWS.config(
    :access_key_id     => @access_key,
    :secret_access_key => @secret_key
  )
  @s3 = AWS::S3.new
  
  def self.get_all_files_at_a_path(bucket, path)
    tree = @s3.buckets[bucket].as_tree(:prefix => path)
    directories = tree.children.select(&:branch?).collect(&:prefix)
    files = tree.children.select(&:leaf?).collect(&:key)
    while directories.size > 0
      dir = directories.pop
      files = files + @s3.buckets[bucket].as_tree(:prefix => dir).children.select(&:leaf?).collect(&:key)
      directories = directories + @s3.buckets[bucket].as_tree(:prefix => dir).children.select(&:branch?).collect(&:prefix)
    end
    return files
  end