sunnygleason/carrierwave — comment on commit 3ff4fcce961bc110a3d67168c37a1b7b511a511a
File: lib/carrierwave/uploader/download.rb line 41
By mkdynamic:

```ruby
mime_type = (MIME::Types[mime] || []).detect do |mime_type|
mime_type.extensions.include?(ext.downcase)
end
```