Bash function to compare two urls

urldiff.sh

#urldiff http://www.google.com http://www.yahoo.com
function urldiff () {
  local file
	local files=""
	for url in "$@"
	do
		file="urldiff-"${url//[^a-zA-Z0-9]/}
		files=$files" "$file
		echo "downloading $url > $file"
		lwp-request -m 'GET' $url > $file
	done
	echo "diff $files"
	diff $files
	echo "rm $files"
	rm $files
}