Regex in scrip won't match multi-line strings

RT Users
1

Hi all,

I’m trying to automatically resolve tickets that don’t require any action.
In this example, I receive a backup notification. I know it’s a backup
script result email based on the subject, and I know the backup was
successful (and therefore I can auto-resolve the ticket) if another regex
matches the body. When I match against the subject line alone, it works.
However, when I try to match against the mutli-line body, it never matches
(even though when I run the regex against the string in a test, it matches
as expected).

Are multi-line matches not an option, or do I need to test in another way?
This is an extract of the test I am running:

(($self->TicketObj->Subject =~ /Cron <root@blah> /usr/bin/s3cmd sync
/var/spool/blah/ s3://somes3buckethere//) &&
($self->TicketObj->Body =~ /Done. Uploaded \d* bytes in \d.\d seconds/))

Thank you,

Peter
Peter Nikolaidis
CISSP
https://webportal.isc2.org/custom/CertificationVerificationResults.aspx?FN=Peter&LN=Nikolaidis&CN=453003
, GCFE https://www.giac.org/certified-professional/peter-nikolaidis/118082
, GCIH https://www.giac.org/certified-professional/peter-nikolaidis/118082
, GPPA http://www.giac.org/certified-professional/peter-nikolaidis/118082
, GSNA http://www.giac.org/certified-professional/peter-nikolaidis/118082
Paradigm Consulting Co.
MA:617.517.2940 <(617)%20517-2940> * NH:603.676.7119 <(603)%20676-7119>

2

Hi all,

I’m trying to automatically resolve tickets that don’t require any action.
In this example, I receive a backup notification. I know it’s a backup
script result email based on the subject, and I know the backup was
successful (and therefore I can auto-resolve the ticket) if another regex
matches the body. When I match against the subject line alone, it works.
However, when I try to match against the mutli-line body, it never matches
(even though when I run the regex against the string in a test, it matches
as expected).

Are multi-line matches not an option, or do I need to test in another way?

From:

http://perldoc.perl.org/perlre.html

“”"
Modifier m

Treat the string as multiple lines. That is, change “^” and “$” from
matching the start of the string’s first line and the end of its last
line to matching the start and end of each line within the string.
“”"
I almost always use /xms for my REs. This allows for significant
readability - at the cost of significant number of lines. Check out
Damian Conway’s “Perl Best Practices” Regular Expression chapter.

-m

3

Apparently I’m still doing something wrong and regex is kicking my butt.

Sample message body:

  • Stopping Asterisk PBX: asterisk
    …done.
  • Starting Asterisk PBX: asterisk
    …done.

Patterns I’ve tried:
1:
(($self->TicketObj->Subject =~ /Cron <root@pbx> /etc/init.d/asterisk
restart/) && # Successful cron jobs.
($self->TicketObj->Body =~ /* Starting Asterisk PBX:
asterisk\n...done./m)

2:
(($self->TicketObj->Subject =~ /Cron <root@pbx> /etc/init.d/asterisk
restart/) && # Successful cron jobs.
($self->TicketObj->Body =~ /* Starting Asterisk PBX:
asterisk....done./ms))
3:
(($self->TicketObj->Subject =~ /Cron <root@pbx> /etc/init.d/asterisk
restart/) && # Successful cron jobs.
($self->TicketObj->Body =~ /^* Starting Asterisk PBX:
asterisk....done.$/ms)) ||

Any ideas?

Thanks,

PeterOn Mon, Feb 27, 2017 at 10:57 AM, Matt Zagrabelny mzagrabe@d.umn.edu wrote:

On Mon, Feb 27, 2017 at 9:48 AM, Peter Nikolaidis petern@paradigmcc.com wrote:

Hi all,

I’m trying to automatically resolve tickets that don’t require any
action.
In this example, I receive a backup notification. I know it’s a backup
script result email based on the subject, and I know the backup was
successful (and therefore I can auto-resolve the ticket) if another regex
matches the body. When I match against the subject line alone, it works.
However, when I try to match against the mutli-line body, it never
matches
(even though when I run the regex against the string in a test, it
matches
as expected).

Are multi-line matches not an option, or do I need to test in another
way?

From:

perlre - Perl regular expressions - Perldoc Browser

“”"
Modifier m

Treat the string as multiple lines. That is, change “^” and “$” from
matching the start of the string’s first line and the end of its last
line to matching the start and end of each line within the string.
“”"
I almost always use /xms for my REs. This allows for significant
readability - at the cost of significant number of lines. Check out
Damian Conway’s “Perl Best Practices” Regular Expression chapter.

-m

4

Apparently I’m still doing something wrong and regex is kicking my butt.

Sample message body:

  • Stopping Asterisk PBX: asterisk
    …done.
  • Starting Asterisk PBX: asterisk
    …done.

Patterns I’ve tried:

1:
(($self->TicketObj->Subject =~ /Cron <root@pbx> /etc/init.d/asterisk
restart/) && # Successful cron jobs.
($self->TicketObj->Body =~ /* Starting Asterisk PBX:
asterisk\n...done./m)

2:
(($self->TicketObj->Subject =~ /Cron <root@pbx> /etc/init.d/asterisk
restart/) && # Successful cron jobs.
($self->TicketObj->Body =~ /* Starting Asterisk PBX:
asterisk....done./ms))
3:
(($self->TicketObj->Subject =~ /Cron <root@pbx> /etc/init.d/asterisk
restart/) && # Successful cron jobs.
($self->TicketObj->Body =~ /^* Starting Asterisk PBX:
asterisk....done.$/ms)) ||

Any ideas?

#!/usr/bin/perl

use strict;
use warnings;

my $sample_message_body = <<EOF;

  • Stopping Asterisk PBX: asterisk
    …done.
  • Starting Asterisk PBX: asterisk
    …done.
    EOF

my $sample_message_body_2 = <<EOF;

  • Stopping Asterisk PBX: asterisk.
    …done.
  • Starting Asterisk PBX: asterisk.
    …done.
    EOF

my $re = qr{
^*\s+Stopping\s+Asterisk\s+PBX:\s+asterisk$
\n
^...done.$
\n
^*\s+Starting\s+Asterisk\s+PBX:\s+asterisk$
\n
^...done.$
}xms;

if ($sample_message_body =~ $re) {
print “MATCHES!\n”;
}
else {
print “NOPE!\n”;
}

if ($sample_message_body_2 =~ $re) {
print “MATCHES!\n”;
}
else {
print “NOPE!\n”;
}

-m