require HTML::LinkExtor; $p = HTML::LinkExtor->new(\&cb, "http://www.sn.no/"); sub cb { my($tag, %links) = @_; print "$tag @{[%links]}\n"; } $p->parse_file("index.html");
The HTML::LinkExtor is a subclass of HTML::Parser. This means that the document should be given to the parser by calling the $p->parse() or $p->parse_file() methods.
The callback is called with the lowercase tag name as first argument, and then all link attributes as separate key/value pairs. All non-link attributes are removed.
[$tag, $attr => $url1, $attr2 => $url2,...]The $p->links method will also truncate the internal link list. This means that if the method is called twice without any parsing in between then the second call will return an empty list.
Also note that $p->links will always be empty if a callback routine was provided when the the HTML::LinkExtor manpage was created.
use LWP::UserAgent; use HTML::LinkExtor; use URI::URL;
$url = "http://www.sn.no/"; # for instance $ua = new LWP::UserAgent;
# Set up a callback that collect image links my @imgs = (); sub callback { my($tag, %attr) = @_; return if $tag ne 'img'; # we only look closer at <img ...> push(@imgs, values %attr); }
# Make the parser. Unfortunately, we don't know the base yet (it might # be diffent from $url) $p = HTML::LinkExtor->new(\&callback);
# Request document and parse it as it arrives $res = $ua->request(HTTP::Request->new(GET => $url), sub {$p->parse($_[0])});
# Expand all image URLs to absolute ones my $base = $res->base; @imgs = map { $_ = url($_, $base)->abs; } @imgs;
# Print them out print join("\n", @imgs), "\n";