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For 2023 - we are now fully retired from IT training.
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hostname substitution to form url in xml

Posted by thierry (thierry), 22 December 2008
I have inherited a lovely Nagios install where webinject ( is used to run a series of 20 odd test cases.

Each test case is based on an xml file that contaisn the following stanza:

In their great wisdom the local guys have decided to copy/paste/edit these xml so they have a set of files for each and every $hostname resulting in hundreds of files...

I _know_ there is a better way to do this if I could only learn/understand how to programmaticaly replace $hostname for each server I need to runsaid test for.

Any pointer would be great


Posted by KevinAD (KevinAD), 24 December 2008
it is possible to expand a scalar variable in a file using a regular expression with the e option:

my $hostname = '';
my $text = 'url=http://$hostname:port/path_to_app';
$text =~ s/(\$hostname)/$1/eeg;

How you apply that to your spefic requirements is the trick.

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