#!/bin/sh

usage="Usage: $0 filename [urlroot]"

test $# -eq 0 && echo "$usage" && exit 1
test $# -gt 2 && echo "$usage" && exit 1

imgurls=`cat "$1" \
| awk -F \( '/!\[[^\]]*\]\([^\)]*\)/ {print $2}' \
| sed 's/)\]$//' \
| awk '{print $1}'`

for i in $imgurls; do
	echo "$i" | grep -q '//'
	test $? -ne 0 && i="${2}${i}"
	wget "$i"
done