Can't get Paperclip to set my S3 URLs properly

Question

I'm using paperclip and aws-sdk gems in a Rails 4 app.

I define the :path option in my paperclip.rb config, with no :url option:

Paperclip::Attachment.default_options[:path] = ":class/:attachment/:id_partition/:style/:filename"

It saves my uploaded images like such:

http://s3.amazonaws.com/mybucket-development/profiles/avatars/000/000/026/original/image_file_name.png?1420575189

All fine, it gets saved to S3. However it refuses to let me read the images for display, e.g. =profile.avatar.url(:medium). When I go to that URL in the browser it tells me to re-format it with the bucket name as a domain. Like:

http://mybucket-development.s3.amazonaws.com/profiles/avatars/000/000/026/original/image_file_name.png?1420575189

OK, not a problem either. I go to that URL, I can view my image. So now I need to figure out how to get Paperclip to format the URLs like this automatically. I read in the Paperclip docs that you just have to set

Paperclip::Attachment.default_options[:url] = ":s3_domain_url"

And that I also have to set the :path parameter or I will just get a Paperclip::Errors::InfiniteInterpolationError.

So I set my config file with both combined:

Paperclip::Attachment.default_options[:path] = ":class/:attachment/:id_partition/:style/:filename"
Paperclip::Attachment.default_options[:url] = ":s3_domain_url"

Not working... I try scrapping the paperclip.rb and putting it in config/environments/* But no matter what I do, it still saves the URLs without the domain with the bucket name in the path.

So two questions:

1) How can I get Paperclip to automatically format the saved URLs in domain style?

2) Or even better, how can I get S3 to accept the non-domain style URLs, the one that Paperclip is currently generating?

EDIT

So, if I add in the s3_host_name option then it saves the URLs domain style. So I have to have all 3 of:

Paperclip::Attachment.default_options[:url] = ':s3_domain_url'
Paperclip::Attachment.default_options[:path] = ":class/:attachment/:id_partition/:style/:filename"
Paperclip::Attachment.default_options[:s3_host_name] = 's3-us-west-2.amazonaws.com'

And it will save my URLs on the model like so:

http://mybucket-development.s3-us-west-2.amazonaws.com/profiles/avatars/000/000/026/original/image_file_name.png%3F1420580224

But now I see that I have a %3F encoding ("?") in the URL which messes it up.

Answer 1

Alright, so as mentioned in the above update, to get the domain-style URLs to be saved by Paperclip I have to include all 3 of the following in my paperclip.rb:

Paperclip::Attachment.default_options[:url] = ':s3_domain_url'
Paperclip::Attachment.default_options[:path] = ":class/:attachment/:id_partition/:style/:filename"
Paperclip::Attachment.default_options[:s3_host_name] = 's3-us-west-2.amazonaws.com'

I believe there is a related issue from recent gem upgrades, this produces URLs with encodings that won't work on their own.

So in my views I have had to add URI.unescape, such as

=image_tag URI.unescape(profile.avatar.url(:medium))

I could also set a callback on the model to replace the %3F with the "?" before save.

Strange issue with Paperclip... not sure what was going on. First app I've worked on where I encountered that issue.