Paperclip initializer for S3 Europe.

paperclip.rb

Paperclip.interpolates(:s3_eu_url) { |attachment, style|                   
  "#{attachment.s3_protocol}://s3-eu-west-1.amazonaws.com/#{attachment.bucket_name}/#{attachment.path(style).gsub(%r{^/}, "")}"
}
require 'aws/s3'                                                                                            
AWS::S3::DEFAULT_HOST.replace "s3-eu-west-1.amazonaws.com"

To avoid the warning on server startup you can use:

AWS::S3::DEFAULT_HOST.replace "s3-eu-west-1.amazonaws.com"

Actually I had it in my initializer file but forgot to update it here.

Thanks mmarschall!