Script to find all <script src="...."> in a URL source code

find-script-src.sh

#!/bin/bash

if [ -z $1 ] || [ "$1" == "-h" ] || [ "$1" == "--help" ]; then
    echo "Usage: "$(basename $0)" <url>"
    echo 
    echo "This script finds all external scripts referred by <script> tags"
    exit 1
fi

curl -L -s "$1" | tr '\r\n\t' ' ' | sed $'s/\(<\/[^>]*>\)/\\1\\\n/g' | sed 's/^ *//;s/ *$//' | grep "^<script" | grep --color=always "src=[\"'][^\"']\+[\"']" | while read i; do echo -e $i"\n"; done