We’re using paperclip to store files to S3 on a rails 3 project.

Our buckets are in europe and the s3 gem default sets the host to the US.

Here’s a quick initializer to override and set to use a european host (or one of your choosing).

Code from ella with minor adjustments:
https://github.com/marcel/aws-s3/issues/4

aws_s3_europe.rb

 
module AWS
  module S3
    ENDPOINTS = {
      :us     => 's3-us-west-1.amazonaws.com', 
      :asia   => 's3-ap-southeast-1.amazonaws.com', 
      :europe => 's3-eu-west-1.amazonaws.com'
    }
    
    class Base
      class << self
        def region= region
          endpoint = ENDPOINTS[region] or 
          raise S3Exception, "Unknown region: please use one of #{ENDPOINTS.keys.map(&:inspect).join(', ')}."
          DEFAULT_HOST.replace endpoint
        end
      end
    end
  end
end

AWS::S3::Base.region = :europe