corrupt PDF attachment using ActionMailer

[Luma]

Hi,

I can successfully generate and save PDFs using prawn 1.0.0.rc2 and rails 3.2.13. But when I attach such a file to an email and send it via ActionMailer, the attachment is corrupt and can't be opened using Adobe Reader 10.1.7.27. The german error message is: "Beim Öffnen dieses Dokuments ist ein Fehler aufgetreten. Die Datei ist beschädigt und kann nicht repariert werden."

The attachment is not corrupt when I remove all 3 of the following lines:

pdf.font_families.update("SlimbachStd" => font_files)

pdf.image "#{Rails.root}/public/images/Logo_v2.jpg"

pdf.encrypt_document(:owner_password => PDF_CONFIG['encryption_owner_pass'], 

        :permissions => {:print_document => true, :modify_contents => false, :copy_contents => true, :modify_annotations => false})

So how can I make it work?

It also works when I change my mailer to generate the PDF directly instead of reading it from the filesystem. But that's not an option for me because I also have to send PDFs that have previously generated and saved using prawn, and also the request for sending the email takes 1-2 minutes then in development mode!

invoice_pdf.rb:

# encoding: utf-8

require "prawn"

require "prawn/measurement_extensions"

class InvoicePdf

  

  def create_and_save(directory, filename, content_hash)

    pdf = Prawn::Document.new

    

    # prepare the fonts

    font_files = {}

    font_path = "#{Rails.root}/vendor/fonts"

    [:bold, :book, :medium].each do |style|

      font_files[style] = "#{font_path}/SlimbachStd-#{style.to_s.capitalize}.ttf"

    end

    pdf.font_families.update("SlimbachStd" => font_files)    # makes it corrupt

    

    # set the default font

    pdf.font "SlimbachStd", :style => :book

    pdf.font_size 10

    

    # start content

    pdf.image "#{Rails.root}/public/images/Logo_v2.jpg"    # makes it corrupt

    

    pdf.text "Invoice", :size => 30

    pdf.text "signs like äöüßÄÖÜ are working"

    

    # some more content...

    

    # encryption

    pdf.encrypt_document(:owner_password => PDF_CONFIG['encryption_owner_pass'], 

        :permissions => {:print_document => true, :modify_contents => false, :copy_contents => true, :modify_annotations => false})    # makes it corrupt

    

    # save

    FileUtils.makedirs(directory)

    pdf.render_file("#{directory}/#{filename}")

  end

  

end

order_mailer.rb:

class OrderMailer < ActionMailer::Base

  

  def order_confirmation_email(pdf_attachments, time, sender, receivers, cc, bcc, subject, body_hash)

    # template is order_confirmation_email.text.erb

    attach_pdfs(pdf_attachments)

    mail(:date => time, :from => sender, :to => receivers, :cc => cc, :bcc => bcc, :subject => subject)

  end

  def edited_template_email(pdf_attachments, time, sender, receivers, cc, bcc, subject, body_string)

    attach_pdfs(pdf_attachments)

    mail(:date => time, :from => sender, :to => receivers, :cc => cc, :bcc => bcc, :subject => subject) do |format|

      format.text { render :text => body_string, :layout => false }

    end

  end

  

  private

  def attach_pdfs(pdf_attachments)

    pdf_attachments.each do |path_filename, filename_attachment|

      attachments[filename_attachment] = {

        mime_type: 'application/pdf',

        content: File.read(path_filename)

      }

    end

  end

end

gemfile.lock:

GIT

  remote: git://github.com/prawnpdf/prawn.git

  revision: fba53264342fbfd5069b20c84f45664275c74931

  tag: 1.0.0.rc2

  specs:

    prawn (1.0.0.rc2)

      afm

      pdf-reader (>= 0.9.0, < 2.0)

      ruby-rc4

      ttfunk (~> 1.0.3)

GIT

  remote: git://github.com/sofatutor/validates_date_time

  revision: 3f27d414bb47e064341af3a623d40ebd2c2b5c6e

  branch: rails-3

  specs:

    validates_date_time (1.0.0)

GEM

  remote: https://rubygems.org/

  specs:

    Ascii85 (1.0.2)

    actionmailer (3.2.13)

      actionpack (= 3.2.13)

      mail (~> 2.5.3)

    actionpack (3.2.13)

      activemodel (= 3.2.13)

      activesupport (= 3.2.13)

      builder (~> 3.0.0)

      erubis (~> 2.7.0)

      journey (~> 1.0.4)

      rack (~> 1.4.5)

      rack-cache (~> 1.2)

      rack-test (~> 0.6.1)

      sprockets (~> 2.2.1)

    activemodel (3.2.13)

      activesupport (= 3.2.13)

      builder (~> 3.0.0)

    activerecord (3.2.13)

      activemodel (= 3.2.13)

      activesupport (= 3.2.13)

      arel (~> 3.0.2)

      tzinfo (~> 0.3.29)

    activeresource (3.2.13)

      activemodel (= 3.2.13)

      activesupport (= 3.2.13)

    activesupport (3.2.13)

      i18n (= 0.6.1)

      multi_json (~> 1.0)

    afm (0.2.0)

    arel (3.0.2)

    builder (3.0.4)

    certified (0.1.1)

    coffee-rails (3.2.2)

      coffee-script (>= 2.2.0)

      railties (~> 3.2.0)

    coffee-script (2.2.0)

      coffee-script-source

      execjs

    coffee-script-source (1.6.2)

    daemons (1.1.9)

    dynamic_form (1.1.4)

    erubis (2.7.0)

    eventmachine (1.0.3)

    eventmachine (1.0.3-x86-mingw32)

    exception_notification (3.0.1)

      actionmailer (>= 3.0.4)

    execjs (1.4.0)

      multi_json (~> 1.0)

    hashery (2.1.0)

    hike (1.2.2)

    i18n (0.6.1)

    journey (1.0.4)

    jquery-rails (2.2.1)

      railties (>= 3.0, < 5.0)

      thor (>= 0.14, < 2.0)

    json (1.8.0)

    mail (2.5.4)

      mime-types (~> 1.16)

      treetop (~> 1.4.8)

    mime-types (1.23)

    multi_json (1.7.3)

    mysql2 (0.3.11)

    mysql2 (0.3.11-x86-mingw32)

    nokogiri (1.5.9)

    nokogiri (1.5.9-x86-mingw32)

    pdf-reader (1.3.3)

      Ascii85 (~> 1.0.0)

      afm (~> 0.2.0)

      hashery (~> 2.0)

      ruby-rc4

      ttfunk

    polyglot (0.3.3)

    rack (1.4.5)

    rack-cache (1.2)

      rack (>= 0.4)

    rack-ssl (1.3.3)

      rack

    rack-test (0.6.2)

      rack (>= 1.0)

    rails (3.2.13)

      actionmailer (= 3.2.13)

      actionpack (= 3.2.13)

      activerecord (= 3.2.13)

      activeresource (= 3.2.13)

      activesupport (= 3.2.13)

      bundler (~> 1.0)

      railties (= 3.2.13)

    railties (3.2.13)

      actionpack (= 3.2.13)

      activesupport (= 3.2.13)

      rack-ssl (~> 1.3.2)

      rake (>= 0.8.7)

      rdoc (~> 3.4)

      thor (>= 0.14.6, < 2.0)

    rake (10.0.4)

    rdoc (3.12.2)

      json (~> 1.4)

    ruby-rc4 (0.1.5)

    sass (3.2.9)

    sass-rails (3.2.6)

      railties (~> 3.2.0)

      sass (>= 3.1.10)

      tilt (~> 1.3)

    sprockets (2.2.2)

      hike (~> 1.2)

      multi_json (~> 1.0)

      rack (~> 1.0)

      tilt (~> 1.1, != 1.3.0)

    thin (1.5.1)

      daemons (>= 1.0.9)

      eventmachine (>= 0.12.6)

      rack (>= 1.0.0)

    thor (0.18.1)

    tilt (1.4.1)

    treetop (1.4.12)

      polyglot

      polyglot (>= 0.3.1)

    ttfunk (1.0.3)

    tzinfo (0.3.37)

    uglifier (2.1.0)

      execjs (>= 0.3.0)

      multi_json (~> 1.0, >= 1.0.2)

PLATFORMS

  x86-mingw32

DEPENDENCIES

  certified

  coffee-rails (~> 3.2.1)

  dynamic_form

  exception_notification

  jquery-rails

  mysql2

  nokogiri

  prawn!

  rails (= 3.2.13)

  sass-rails (~> 3.2.3)

  thin

  uglifier (>= 1.0.3)

  validates_date_time!

[Luma]

The problem description above relates to Windows 7 64-bit. It works when I run the app on Ubuntu 12.04 LTS...

[Naveed Kakal]

This is due to Windows - I'm not sure on the why, but to fix it, open your file in `rb` mode, or use `File.binread` when working with attachments and ActionMailer.

In your original code (addition in red):

def attach_pdfs(pdf_attachments)

    pdf_attachments.each do |path_filename, filename_attachment|

      attachments[filename_attachment] = {

        mime_type: 'application/pdf',

        content: File.read(path_filename, 'rb')

      }

    end

  end