ActionMailer - Adding an attachment from S3

rubyonrails-talk
1

Seems simple enough but I haven't been able to get it to work. The files work fine from S3 on my web app, but when I email them out via ActionMailer as attachments, see the code below, the files are corrupt.

App Stack: rails 3, heroku, paperclip + s3

Here's the code:

    class UserMailer < ActionMailer::Base     # Add Attachments if any     if @comment.attachments.count > 0       @comment.attachments.each do |a|         require 'open-uri'         open("#{Rails.root.to_s}/tmp/#{a.attachment_file_name}", "wb") do |file|           file << open(a.authenticated_url()).read           attachments[a.attachment_file_name] = File.read("#{Rails.root.to_s}/tmp/#{a.attachment_file_name}")         end       end     end

    mail( :to => "#{XXXX}",           :reply_to => "XXXXX>",           :subject => "XXXXXX"           )

a.authenticated_url() just gives me a URL to s3 to get the file (of any type), I checked this, works fine. Something to do with the way I'm saving the tempfile must be breaking the ActionMailer Attachment.

Any ideas?