Re^4: Module to get domain name from hostname

root@sugzum:~/host# cat b2.pl
 #!/usr/bin/perl
 use feature qw(say);
 use Mozilla::PublicSuffix qw(public_suffix);
 open F, &quot;<host.txt&quot; or die $!;
 while (<F>) {
 $hostname = &quot;$_&quot;;
 }
 close F;
 my $tld = public_suffix($hostname)
 or die &quot;Invalid TLD found in '$hostname'&quot;;
 $hostname =~ /([^.]+).\Q$tld\E$/
 or die &quot;Couldn't find domain name in '$hostname'&quot;;
 my $domainname= $1;
 print &quot;Domain name is $domainname.$tld\n&quot;;
 
root@sugzum:~/ssh2smtp# cat host.txt 
200-206-30-98.customer.tdatabrasil.net.br
root@sugzum:~/ssh2smtp# perl b2.pl
Invalid TLD found in '200-206-30-98.customer.tdatabrasil.net.br
' at b2.pl line 9.
[download]

Sorry, I'm a beginner. I can't figure it out to understand how this works.

Comment on Re^4: Module to get domain name from hostname Download Code

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Re^5: Module to get domain name from hostname by Corion (Patriarch) on Jan 30, 2015 at 07:52 UTC
Your string `$hostname` still has the newline at the end of it, which is why the error message shows on two lines: `Invalid TLD found in '200-206-30-98.customer.tdatabrasil.net.br ' at b2.pl line 9.` [download] Remove all whitespace from the end of `$hostname` after you've read it from the file: `$hostname =~ s/\s+$//;` [download] That way, the call to `public_suffix()` should succeed.	[reply] [d/l] [select]
Re^6: Module to get domain name from hostname by Anonymous Monk on Jan 30, 2015 at 14:07 UTC
Thanks for the help. It works as it should.	[reply]