A simple fog/s3 client

aws_client.rb

require 'fog'

module AWS
  class Client
    def initialize( options={} )
      @access_key  = options.delete( :access_key  ) or raise "AWS::Client requires an :access_key"
      @secret_key  = options.delete( :secret_key  ) or raise "AWS::Client requires a :secret_key"
      @bucket_name = options.delete( :bucket_name ) or raise "AWS::Client requires a :bucket_name"
      @aws_region  = options.delete( :aws_region  )
    end
    
    def get( filename )
      bucket.files.get filename
    end

    def read( filename )
      get( filename ).body rescue "Can't read file at #{filename}"
    end

    def write( filename, body )
      if file = get( filename )
        file.body = body
        file.save
      else
        storage.put_object @bucket_name, filename, body, headers
      end
    end
    
    protected

    def headers
      { 'x-amz-acl' => 'public-read' }
    end

    def bucket
      @bucket ||= storage.directories.get @bucket_name
    end

    def storage
      @storage ||= begin
        storage = Fog::Storage.new :provider              => 'AWS',
                                   :aws_access_key_id     => @access_key,
                                   :aws_secret_access_key => @secret_key,
                                   :region                => @aws_region
        storage.sync_clock
        storage
      end
    end
  end
end