determine_protocol
get_domain

# check for explicit feed link
feed_link=`echo "$content" | grep -Po '(?<=<link href=").*?(?=" rel="alternate" type="application/atom\+xml">)' | head -1 | tr '\0' '\n'`
if [[ -n $feed_link ]]
then
	page_ext="${protocol}${domain}${feed_link}"
fi

# if explicit feed link not found get user URL and add /feed.atom
if [[ "$page_ext" == "" ]]
then
	determine_protocol
	get_domain
	username="${url##*//}"
	username="${username#*/}"
	
	if [[ "$username" == users/* ]]
	then
		username="${username#*/}"
		username="users/${username%%/*}"
		page_ext="${protocol}${domain}/${username}/feed.atom"
	fi
fi