Re: How to check if a website is up?

This simplest solution is LWP::Simple

use LWP::Simple;
my $url="http://cpan.org";
if (! head($url)) {
  die "The Server is DOWN!!!!" 
}
[download]

an alternative is using a get:

if (! get($url)) {
[download]

but that would fetch the content of the page. A head call uses the least resources, just telling you weather the machine is responding to that url.

Comment on Re: How to check if a website is up? Select or Download Code

Replies are listed 'Best First'.
"Up" is an ill-defined concept by pbeckingham (Parson) on Apr 05, 2004 at 19:42 UTC
There is a whole continuum of remote server "up" detection - from mere connectivity, through to accurate and timely responses. A machine may be in several states and conditions, and depending on quite what you are looking for, some of which can be: single-user multi-user port 80 accepting http://domain responding http://domain/file responding http://domain/file responding quickly enough It may also be that the site content is unpredictable, so a specific URL may not be something you want to check. Then there is a question of whether one of the unacceptable conditions might change if you retry. For example, instantaneous loads may indicate a very poor response time, but with a perfectly acceptable average.	[reply]
Re^2: How to check if a website is up? by ytjPerl (Scribe) on May 29, 2019 at 16:11 UTC
Hi I use the head as you mentioned, but it always says the server being down with the successful URL.	[reply]