Re: adding spamassassin tests -- howto?

[Will Trillich <will@serensoft.com>]

On Mon, Apr 19, 2004 at 09:12:37AM -0400, Andrew Schulman wrote:
> > we're looking for the approved "how-to-add-a-custom-test to
> > spamassassin" method...
> 
> http://wiki.apache.org/spamassassin/WritingRules

that's important information. good site -- thanks for the link.

but the tests we need involve a bit more than plain old regex
matching, so we need to CREATE OUR OWN EVAL TESTS in perl:


spamassassin prefs:

	header NONALPHA_RATIO eval:check_nonalpha_chars('Subject', 0.2, 3)

perl EvalTests.pm code:

	# raise a flag on headers such as
	# Subject: Real Good  XX3NICAL__  ULTR@M__  F!0RIC3T__  CI@_LiS__  V1AGR0__  TR_AM_AD0L
	sub check_nonalpha_chars {
	  my ($self, $header, $ratio, $count) = @_;

	  $header .= ":raw" unless ($header eq "ALL" || $header =~ /:raw$/);
	  my $str = $self->get($header);
	  return 0 unless $str;

	  # ditch whitespace
	  $str =~ s/\s+//g;
	  # count nonalpha characters
	  my $nonalpha = () = ($str =~ /[^A-Za-z]/g);

	  my $is = $nonalpha / length($str);
	  return ( ($nonalpha >= $count && $is >= $ratio) ? "$is" : undef );
	}

that's not something a regex can handle.

we could put it into /usr/share/perl5/Mail/SpamAssassin/EvalTests.pm
but that doesn't feel kosher. what's the proper approach?

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