Diagrams referenced by URL in PDF?

If I include a diagram by URL reference, the HTML generates properly (as one would expect).

The PDF does not; the reference is just output in its literal form.

Should the PDF generator know how to do the inclusion? Or do I need to make a static copy of the diagram (which may change at source...) and save that, and then reference it locally to get it in the PDF?

- thomas

Right. This all makes sense. Thanks for the answer!

So far I can't get this to work. I have the following command line (in a script):

run_asciidoctor_pdf () {
	out_file=${1}.pdf

	# work out the options
	opts="-a current_year=$year \
		-a stylesdir=$stylesdir \
		-a resources_dir=$resources_dir \
		-a uml_export_dir=$uml_export_dir \
		-a pdf-style=$pdf_theme \
		-a pdf-stylesdir=$resources_dir \
		-a allow-uri-read -a cache-uri \
		-r asciidoctor-pdf -b pdf \
		--out-file=$out_file"

	# -a pdf-fontsdir=path/to/fonts 
	if [ "$pdf_trace" = true ]; then
		opts="${opts} --trace"
	fi

	asciidoctor ${opts} $2
	echo generated $(pwd)/$out_file
}

I just added the line '-a allow-uri-read -a cache-uri' to the previous version.

I installed open-uri-cached as above.

When I run my script, something happens, because I see this in /tmp (actually in cygwin's /tmp area):

/tmp
    /open-uri-1001
        /www.openehr.org   # this is indeed the site from which the image comes
            8a4608a543e26f1107b8842d250d74f7f86607db
            8a4608a543e26f1107b8842d250d74f7f86607db.meta

But there is no .png or .svg in /tmp. The source link is to a .svg.

The output from running asciidoctor, with trace turned on is:

/usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/temporary_path.rb:5:in `unlink': No such file or directory @ unlink_internal - /tmp/image-20160421-226964-199iqrn.png (Errno::ENOENT)
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/temporary_path.rb:5:in `unlink'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:2216:in `unlink_tmp_file'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:859:in `convert_image'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:88:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:71:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:80:in `block in content'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:80:in `map'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:80:in `content'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:104:in `convert_content_for_block'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:305:in `convert_section'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:88:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:71:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:80:in `block in content'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:80:in `map'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/abstract_block.rb:80:in `content'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/document.rb:1104:in `content'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:104:in `convert_content_for_block'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:149:in `convert_document'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.8/lib/asciidoctor-pdf/converter.rb:88:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/document.rb:1044:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor.rb:1503:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/cli/invoker.rb:94:in `block in invoke!'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/cli/invoker.rb:86:in `each'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/cli/invoker.rb:86:in `invoke!'
        from /usr/local/gems/asciidoctor-1.5.4/bin/asciidoctor:14:in `<top (required)>'
        from /home/Thomas/bin/asciidoctor:23:in `load'
        from /home/Thomas/bin/asciidoctor:23:in `<main>'

any ideas?

- thomas

That did occur to me about 1 minute after posting.... so with the update, I get this:

/usr/local/gems/ttfunk-1.4.0/lib/ttfunk.rb:34:in `verify_and_open': /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.11/data/fonts/notoserif-regular-latin.ttf not found (ArgumentError)
        from /usr/local/gems/ttfunk-1.4.0/lib/ttfunk.rb:13:in `open'
        from /usr/local/gems/prawn-2.0.1/lib/prawn/font/ttf.rb:351:in `read_ttf_file'
        from /usr/local/gems/prawn-2.0.1/lib/prawn/font/ttf.rb:27:in `initialize'
        from /usr/local/gems/prawn-2.0.1/lib/prawn/font.rb:292:in `new'
        from /usr/local/gems/prawn-2.0.1/lib/prawn/font.rb:292:in `load'
        from /usr/local/gems/prawn-2.0.1/lib/prawn/font.rb:244:in `find_font'
        from /usr/local/gems/prawn-2.0.1/lib/prawn/font.rb:58:in `font'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.11/lib/asciidoctor-pdf/prawn_ext/extensions.rb:185:in `font'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.11/lib/asciidoctor-pdf/converter.rb:1525:in `layout_title_page'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.11/lib/asciidoctor-pdf/converter.rb:143:in `convert_document'
        from /usr/local/gems/asciidoctor-pdf-1.5.0.alpha.11/lib/asciidoctor-pdf/converter.rb:96:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/document.rb:1044:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor.rb:1503:in `convert'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/cli/invoker.rb:94:in `block in invoke!'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/cli/invoker.rb:86:in `each'
        from /usr/local/gems/asciidoctor-1.5.4/lib/asciidoctor/cli/invoker.rb:86:in `invoke!'
        from /usr/local/gems/asciidoctor-1.5.4/bin/asciidoctor:14:in `<top (required)>'
        from /home/Thomas/bin/asciidoctor:23:in `load'
        from /home/Thomas/bin/asciidoctor:23:in `<main>'

I suspect this means something like a current default font is no longer supported?

- thomas

That worked!

That new asciidoctor-pdf version is a *lot* better (syntax colourising works, image inclusion, fonts, text flow ...).

But I still see some errors with images. E.g. width=%50 does strange things, some SVGs lose their text, ... shall I report these on the asciidoctor-pdf git tracker?

- thomas

Hi, I just found this thread, since I was hitting the same issue of not rendering URL referenced images in PDF using the Gradle plugin. Is there a config option in the gradle configuration to enable uri read?

Edit : I found the solution in the mean time.

You should add 'allow-uri-read': '' to the attributes of asciidoctor
When running a build against PDF backend, the images are rendered in the PDF document