I bet $a is a relative uri or not a uri at all. Update: Or maybe the URI uses a scheme URI.pm doesn't recognize.

use URI ();

$uri = URI->new('index.pl');
print('Host of Relative URI ', $uri->as_string(), ':', $/);
eval { print($uri->host(), $/); };
print($@) if ($@);
print($/);

$uri = URI->new('www.perlmonks.com');
print('Host of something (', $uri->as_string(), ') that isn\'t a URI a
+t all:', $/);
eval { print($uri->host(), $/); };
print($@) if ($@);
print($/);

$uri = URI->new('ikegami://www.perlmonks.com/');
print('Host of a URI (', $uri->as_string(), ') whose scheme URI.pm doe
+sn\'t recognize:', $/);
eval { print($uri->host(), $/); };
print($@) if ($@);
print($/);

$uri = URI->new('http://www.perlmonks.com/');
print('Host of Absolute URI ', $uri->as_string(), ':', $/);
eval { print($uri->host(), $/); };
print($@) if ($@);
print($/);

$base_uri = URI->new('http://www.perlmonks.com/');
$rel_uri = URI->new('index.pl');
$abs_uri = $rel_uri->abs($base_uri);
print('Host of Relative URI ', $rel_uri->as_string(), ' converted to a
+ Absolute URI using Base URI ', $base_uri->as_string(), ':', $/);
eval { print($abs_uri->host(), $/); };
print($@) if ($@);
print($/);

__END__
output
======
Host of Relative URI index.pl:
Can't locate object method "host" via package "URI::_generic" (perhaps
+ you forgot to load "URI::_generic"?) at !.pl line 5.

Host of something (www.perlmonks.com) that isn't a URI at all:
Can't locate object method "host" via package "URI::_generic" (perhaps
+ you forgot to load "URI::_generic"?) at !.pl line 11.

Host of a URI (ikegami://www.perlmonks.com/) whose scheme URI.pm doesn
+'t recognize:
Can't locate object method "host" via package "URI::_foreign" (perhaps
+ you forgot to load "URI::_foreign"?) at !.pl line 17.

Host of Absolute URI http://www.perlmonks.com/:
www.perlmonks.com

Host of Relative URI index.pl converted to a Absolute URI using Base U
+RI http://www.perlmonks.com/:
www.perlmonks.com
[download]

" I bet $a is a relative uri or not a uri at all."

$a is a uri. I got this script from the CS department at UNC and I know it works. My only problem is that my hosting company didn't have URI installed to I had to install it locally in my domain.

My host uses Apache on Unix.

"perhaps you forgot to load "URI::_generic?"

I loaded the entire URI module including all 40+ supporting packages.

Another possibility is that the URI is of a scheme URI.pm doesn't recognize. What does $a contain?

>perl -MURI::HTTP -e''

>perl -MURI::ikegami -e''
Can't locate URI/ikegami.pm in @INC (@INC contains: ...).
BEGIN failed--compilation aborted.
[download]

Matt

Here is the code



sub process_request {
    my $a = shift @_;

    if (not $a =~ m!^http://.*!) {
        $a = "http://$a"
    }

    my $url = URI->new($a);
    my $host = $url->host();
    my $port = $url->port();
    my $path = $url->path();

    if ($port eq "") {
        $port = 80;
    }

    if ($path eq "") {
        $path = "/"
    }

    return ($host, $port, $path);
}
[download]



The $a is www.cnn.com or anything like that.

Are you sure $a will only be that? For example, 'ftp://blah.com' and 'https://somewhere.com' are valid strings for a URI which would blow up in your example since they use different schemes other than 'http'.

Perhaps a better strategy would be to let the URI module do that work for you since that's what it does best:

  my $str = shift @_;
  my $uri = URI->new($str);
  $uri->scheme('http') unless $uri->scheme;
  ...
[download]

Cheers,
Matt