get pure ip from url

ipurl.sh

#!/bin/sh

# get pure ip from url
function ipurl() {
  echo $1 | 
  sed -e 's/^.*:\/\/\(.*\)/\1/g' |          # remove http(s)://
  awk -F/ '{print $1}' |                    # remove /query/abc?a=b
  xargs ping -c 1 -t 1 |                    # -c only send one package, -t timeout 1s
  sed -n '1p' |                             # result: get first line
  sed -e 's/^.*(\([0-9\.]\{7,\}\)).*/\1/g'  # get ip in the first line
}

# example
# $ ipurl https://github.com/yantze
# 192.30.253.113