Script to monitor a list of links and e-mail the links that are offline... the links are read from a CSV file with the following columns in the following order: title, module, unit, URL (only URL is mandatory)

monitor-links.sh

#!/bin/bash
offline=$(mktemp)
cat all.csv | while read line
do
  title=$(echo "$line" | cut -d ',' -f 1)
  module=$(echo "$line" | cut -d ',' -f 2)
  unit=$(echo "$line" | cut -d ',' -f 3)
  url=$(echo "$line" | cut -d ',' -f 4)
  echo "Checking if $url is online..."
  agent="User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_10_3) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36"
  status=$(curl -XGET -LIk -m 10 -H "$agent" "$url" 2>/dev/null | grep HTTP | tail -1  | sed 's/^[^ ]\+ \([0-9]\+\).*/\1/g')
  if [ -z $status ]
  then
    status="000"
  fi
  echo "Response code is: $status"
  if [ $status -ne "200" ]
  then
    echo "Retrying after a few seconds..."
    sleep 5
    status=$(curl -XGET -LIk -m 10 -H "$agent" "$url" 2>/dev/null | grep HTTP | tail -1  | sed 's/^[^ ]\+ \([0-9]\+\).*/\1/g')
    if [ -z $status ]
    then
      status="000"
    fi
    echo "After trying again, response code is: $status"
    if [ $status -ne "200" ]
    then
      echo "$url is not online!"
      echo "URL: $url" >> $offline
      echo "Title: $title" >> $offline
      echo "Module: $module" >> $offline
      echo "Unit: $unit" >> $offline
      echo "" >> $offline
    fi
  fi
done
echo "Done... so, those URLs are offline:"
cat $offline
echo "Sending e-mail..."
cat $offline | mail -a 'FROM:[email protected]' -s 'Offline links' [email protected]
echo "Done!"
rm $offline