Different S3 permissions for different versions

[krismartin]

I am using CarrierWave with S3 storage to store images. I need to set
different access control for different versions of the image. The
original image need to be kept "private" and the different versions
can be public ("public-read").

I have successfully achieved this by getting down to the underlying
fog gem and change the S3 ACL after the files have been uploaded to S3
using the after_create callback on the model.

Is there an easy way to do this in the uploader?

[Jonas Nicklas]

I think you should be able to do this:

class MyUploader < CarrierWave::Uploader::Base
s3_access_policy :public_read

version :thumb do
s3_access_policy :public
end
end

or something along those lines.

/Jonas

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[krismartin]

That works! Why didn't I think of that :)

So what I did was I make the default s3_access_policy in the uploader
as "private" (since the original need to be kept private) and override
the acl for each version as "public-read"

clas MyUploader < CarrierWave::Uploader::Base
s3_access_policy "private"

version :thumb do
s3_access_policy "public-read"
end
end

Thanks Jonas!

[deepak kumar]

I resolved this issue by setting @fog_public = false in my uploader

class SampleUploader < Carrierwave::Uploader::Base

    @fog_public = false

end

On Monday, 11 February 2013 18:18:02 UTC+5:30, deepak kumar wrote:

@jnicklas That method sounds good, But I for me when I do the same I get the following error 

 

undefined method `s3_access_policy'

I checked the code of fog and carrierwave but couldn't find an example or comment doing this. 

[Yassin Chelabi]

FYI ;)

  version :":thumb", :if => :image? do

    process :resize_and_pad => [40, 40, "white"]

    # when version is called, it initisialize a new class so

    # we must override fog_public to get public url on this version

    self.define_singleton_method(:fog_public) { true }

  end