Hi brendonc

The script below shows one way to parse a file when looking for blocks to modify or excize. It splits the file data into an alternating sequence of block separators and block internals, using the regex that matches both separators. Then it scans the sequence backwards, looking for triplets where block-start, block-internals and block-end match your criteria and it splices out the triplet(s).

Since I don't have a httpd.conf, I made up data from your posting. As is, the script below removes the block containing ServerNameTwo.

Be warned that this use of split might be considered scary.<br

HTH
Rudif

#! perl -w

use strict;

$/ = undef;
my $data = <DATA>;

my @fields = split /(?<=\n)(<\/?VirtualHost.*>[ \t]*\n)/, $data;

printf "sanity check before: %d fields\n", scalar @fields;

for (my $i = $#fields-2; $i >= 0; --$i) {
    if ($fields[$i] =~ m(<VirtualHost.*>[ \t]*\n)   &&
        $fields[$i+1] =~ m(ServerNameTwo)    &&
        $fields[$i+2] =~ m(<\/VirtualHost>[ \t]*\n)
    ) {
        splice @fields, $i, 3;
    }
}

printf "sanity check after: %d fields\n", scalar @fields;
print join '', @fields;


__END__

### mock httpd.conf file used as test data ###

Hello everyone, This is my first post. I've been search 
through previous posts and several Perl books but I haven't 
been able to find a solution to my problem. I'm quite 
new to Perl by the way. Here's the problem. I need to 
parse a httpd.conf file and remove a VirtualHost block. 
It looks like this: 


<VirtualHost 123.123.123.123>
    ServerNameOne www.domain.com
    ...
</VirtualHost>

I need to be able to parse the file, find the 
appropriate ServerName, and then remove that entire VHost block. 
I'm stuck on this one. If anyone can help I would greatly appreciate i
+t. 
Thanks, Brendon


<VirtualHost 123.123.123.123>
    ServerNameTwo www.domain.com
    ...
</VirtualHost>

qwertzuiop...

<SomeOtherBlock>
qwertzuiop...

</SomeOtherBlock>


<VirtualHost 123.123.123.123>
    ServerNameThree www.domain.com
    ...
</VirtualHost>

qwertzuiop...
qwertzuiop...
qwertzuiop...

[download]

In reply to Re: Parsing file and removing a section by Rudif
in thread Parsing file and removing a section by brendonc

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