After reading around it seemed to me that Prawn is out and wkhtmltopdf is in. It also seems like the PDFKit and wicked_pdf gems for Rails are the new cool. So I found a screencast by Ryan on how to use PDFKit. I installed everything, tested wkhtmltopdf on the CLI with no problems, fiddled around with Rails settingsto run multiple processes so the asset pipeline works, and all seemed good, except I'm still stuck at the very end of the process (actually getting the PDF response from the server).
When I request a .pdf
version of my view (I'm using the PDFKit Middleware option) my browser just sits there waiting for a response, but as soon as I kill the Rails process the PDF I expected to get only then pops up in my browser window. What gives?
wkhtmltopdf -V
it says 0.10.0_rc2)config.middleware.use "PDFKit::Middleware"
in my application.rb
file.gem 'pdfkit'
in my Gemfile and installed it with Bundler.pdf
mime-type in my mime_types.rb
initializer with Mime::Type.register_alias "application/pdf", :pdf
config.threadsafe!
to config/environments/development.rb
for multiple threads so asset pipeline doesn't conflict with PDF enginewkhtmltopdf http://www.google.com google.pdf
and it generated a PDF of the Google homepage as expectedThis is the regular html page rendered by Rails (I've blurred the client details):
This is the CLI output by Rails when I try to navigate to localhost:3000/some/path.pdf
. (the app hangs while waiting for a response):
When I finally kill the Rails process with ctrl-c
the PDF finally shows up in the browser as I expected to see it (CSS and HTML rendered properly, so assets seem to load fine):
Swapping PDFKit for wicked_pdf and getting the same results seems to make me think the problem isn't with those libraries, but something to do with my development environment. But wkhtmltopdf runs fine off the command line, so that makes me think that it and QT are doing their job. The problem must be in Rails. Maybe I'm not configuring something properly?
How do I determine what exactly the problem is and how do I fix it?
I'll love you if you can help me <3
I've also tried using an alternative method of rendering the PDF (with .to_pdf
) without the middleware option as follows (doing this I commented out config.middleware.use "PDFKit::Middleware"
from my application.rb
file):
respond_to do |format|
format.html
format.pdf do
html = '<html><body>This is a test.</body></html>'
@pdf = PDFKit.new(html)
send_data @pdf.to_pdf,
:filename => 'whatever.pdf',
:type => 'application/pdf',
:disposition => 'attachment'
end
end
The problem is with wkhtmltopdf itself, specifically, any version after 0.9.9. wkhtmltopdf hangs when run directly from the command-line.
Steps to correct:
brew uninstall wkhtmltopdf
cd /usr/local/Library/Formula/
git checkout 6e2d550 /usr/local/Library/Formula/wkhtmltopdf.rb
brew install wkhtmltopdf
Then verify the correct version is installed wkhtmltopdf --version
which should yield wkhtmltopdf 0.9.9
Citations: