Validate URL using Bash cURL - Check if a resource exists at a URL

validate_url.sh

#!/bin/bash

# Simple function to check http response code before downloading a remote file
# Example usage:
# if `validate_url $url >/dev/null`; then dosomething; else echo "does not exist"; fi

function validate_url () {
  if [[ `curl -s --head "$1" | head -n 1 | grep "HTTP/[1-3].[0-9] [23].."` ]]; then echo "true"; fi
}