[Rails] webrick, thin and shotgun bug? with dragonfly and wicked_pdf/PDFKit

Hi,

i'have started a discussion in dragonfly google group because of
problems using dragonfly image processing gem with wicked_pdf.
http://groups.google.com/group/dragonfly-users/browse_thread/thread/c8602007c3e43753

In these post I have linked to a public github project for testing
this issue.

There's also a heroku app:
http://wicked.heroku.com/projects.pdf

debug mode of wicked_pdf:
http://wicked.heroku.com/projects.pdf?debug=true (the html pdf view)

Sometimes the pdf creation is succesfull,(after heroku restart)

So perhaps it's a server bug

I've created a html view and have made all resources absolute (images
src, js, css files). But pdf rendering fails and I got some error by
uisng shotgun with webrick. Testing with webrick (rails s command) i
got an endless request.

Any thoughts?

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