fetch-to-attrs

#!/bin/sh
#
# Fetch a web page by using curl, then extract a specific attribute.
#
# Example:
#
#   fetch-to-attr http://example.com foo
#
##
set -euf
uri="$1"
attr="$2"
curl -L -s "$uri" | sed -n "s/.*\b$attr *= *['\"]\([^'\"\]*\)'.*/\1/p"