Use CDN with carrierwave + fog in s3 + cloudfront with rails 3.1

Question

I'm using fog with carrierwave in my website. But the images load very very slowly.

Then I want to speed up loading of images with a CDN.

I have followed this tutorial for create the CDN for images:

http://maketecheasier.com/configure-amazon-s3-as-a-content-delivery-network/2011/06/25

I have now my distribution deployed for images but I don't know how works fine the cdn. I have in initializers/fog.rb the next configuration:

CarrierWave.configure do |config|
  config.fog_credentials = {
    :provider               => 'AWS',
    :aws_access_key_id      => 'key',
    :aws_secret_access_key  => 'key',
    :region                 => 'eu-west-1'
  }
  config.fog_host = "http://da33ii2cvf53u.cloudfront.net" #config.asset_host instead of config.fog_host for new fog gem versions
  config.fog_directory  = 'pin-pro'
  config.fog_public     = false
  #config.fog_attributes = {'Cache-Control' => 'max-age=315576000'} 
end 

I dont know if this is correct, but in my local machine it does not works fine for me. I see the image location, is the same route as before:

https://s3-eu-west-1.amazonaws.com/pin-pro/uploads/pins/medium_610cafbe-5d43-4223-ab0e-daa4990863c4.jpg?AWSAccessKeyId=AKIAIDX34WHYKB3ZKFVA&Signature=RwQriNpiRXaTxyfYVvYjsvclUa8%3D&Expires=1333203059

How can I add a CDN to fog file in carrierwave with s3 and cloudfront?

Answer 1

It looks like you haven't added the line below to your config. You will need to replace the sample address below with your cloudfront address from Amazon.

From the github README: https://github.com/jnicklas/carrierwave

"You can optionally include your CDN host name in the configuration. This is highly recommended, as without it every request requires a lookup of this information"

config.asset_host = "http://c000000.cdn.rackspacecloud.com"