for url in `cat urls`; do
	echo "Retrieving $url";
	# TODO allow customizing the proxies, or more generally the retrieval mechanisms
	# TODO allow local caching
	curl --socks localhost:1080 $url > 1.pdf
	curl --socks localhost:1083 $url > 2.pdf
	# TODO verify that we actually obtained pdfs
	if diff 1.pdf 2.pdf; then
		echo "PDFs are identical already, no need to use pdfparanoia"
	else
		cat 1.pdf | pdfparanoia > 1.cleaned.pdf
		cat 2.pdf | pdfparanoia > 2.cleaned.pdf
		if diff 1.cleaned.pdf 2.cleaned.pdf; then
			echo "pdfparanoia successful scrubbed the PDFs"
		else
			echo "pdfparanoia failed!"
		fi
		rm 1.cleaned.pdf
		rm 2.cleaned.pdf
	fi
	rm 1.pdf
	rm 2.pdf
done