I suggest you make a small and simple cgi-script using CGI::Simple or such and see you can get some data in and out of it. Don't yet bother yourself with coupling the cgi-script with your DNS-routines. You can add those later.

Or even better, start using some web-frameworks (Dancer springs to mind) to make life more easy for you.

Greetings, and thanks for your reply. That is a fully working piece of code:


#!/usr/bin/perl -w

use strict;
use Net::DNS;
my $dns = new Net::DNS::Resolver;

for my $domain( @ARGV ) {
    my $mx = $dns->query( $domain, 'MX' );

print "content-type:text/html; charset=utf-8\n\n";
    print "$domain:\n\n";
    foreach my $rr ($mx->answer) {
        print "<br />", $rr->exchange, ' [<b>', $rr->preference, "</b>
+]\n";
    }
}
[download]

Go ahead, stuff it into a cgi script, and put it into a cgi enabled folder. Then enter
http:/yourdomain.tld/path/to/your/script?google.com
In that form, it works just fine.
But that is not my intended final implementation. I had hoped to replace the (@ARGV) with a form input field -- hence the title of this post.
--Chris

#!/usr/bin/perl -Tw
use perl::always;
my $perl_version = "5.12.4";
print $perl_version;

Greetings @grizzley, and thank you for your reply. Sadly, following your advice DOES define $domain, but doing so only nullifies the if loop. So the form fields never show up. FWIW, the perl output in the web log reveals:


Use of uninitialized value $domain in string ne at dnsdig.cgi line 9.
Use of uninitialized value $domain in concatenation (.) or string at d
+nsdig.cgi line 18.
Can't call method "answer" on an undefined value at dnsdig.cgi line 19
+.
[download]


If I understood you correctly, the code I used was:


#!/usr/bin/perl -w

use strict;
use Net::DNS;
my $dns = new Net::DNS::Resolver;

my $domain;

if($domain ne "") {
print "<form action=\"dnsdig.cgi\" method=\"post\">
<input name=\"domain\" type=\"text\" value=\"\" />
<input type=\"submit\" value=\"Get MX\" />
</form>";
} else {
    my $mx = $dns->query( $domain, 'MX' );

print "content-type:text/html; charset=utf-8\n\n";
    print "$domain:\n\n";
    foreach my $rr ($mx->answer) {
        print "<br />", $rr->exchange, ' [<b>', $rr->preference, "</b>
+]\n";
    }
}
[download]


Thanks again for taking the time to respond.
--Chris

#!/usr/bin/perl -Tw
use perl::always;
my $perl_version = "5.12.4";
print $perl_version;