Marc C. wrote in post #1061690:
> Except one part: I don't know how to
> render correctly the HTML in the PDF file.
>
> Currently I use the Prawn library to create the PDF's.

I use Prawn to generate pdf's, Nokogiri to parse the html portion and 
created an element_to_pdf method to walk the html, looking for tags to 
respond to, constructing the pdf.text statements to execute based on the 
tag encountered.

Something like:

doc = Nokogiri::HTML(text)
children = doc.children[1].children[0].children
# doc / html / body / elements
children.each do |child|
  element_to_pdf pdf, child
end

or something like that...  code isn't at hand

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