HTML-LinkExtractor

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LinkExtractor.pm  view on Meta::CPAN

    }

    $this->{_tp} = $tp;

    $this->_parsola();
    return();
}

sub _parsola {
    my $self = shift;

## a stack of links for keeping track of TEXT
## which is all of "<a href>text</a>"
    my @TEXT = ();
    $self->{_LINKS} = [];


#  ["S",  $tag, $attr, $attrseq, $text]
#  ["E",  $tag, $text]
#  ["T",  $text, $is_data]
#  ["C",  $text]
#  ["D",  $text]
#  ["PI", $token0, $text]

    while (my $T = $self->{_tp}->get_token() ) {
        my $NL; #NewLink
        my $Tag = $T->[1]; #         my $Tag = $T->return_tag;
        my $got_TAGS_IN_NEED=0;
## Start tag?
        if($T->[0] eq 'S' ) { #         if($T->is_start_tag) {
            next unless exists $TAGS{$Tag};

## Do we have a tag for which we want to capture text?
            $got_TAGS_IN_NEED = 0;
            $got_TAGS_IN_NEED = grep { /^\Q$Tag\E$/i } @TAGS_IN_NEED;

## then check to see if we got things besides META :)
            if(defined $TAGS{ $Tag }) {

                for my $Btag(@{$TAGS{$Tag}}) {
## and we check if they do have one with a value
                    if(exists $T->[2]->{ $Btag }) { #                     if(exists $T->return_attr()->{ $Btag }) {

                        $NL = $T->[2]; #                         $NL = $T->return_attr();
## TAGS_IN_NEED are tags in deed (start capturing the <a>STUFF</a>)
                        if($got_TAGS_IN_NEED) {
                            push @TEXT, $NL;
                            $NL->{_TEXT} = "";
                        }
                    }
                }
            }elsif($Tag eq 'meta') {
                $NL = $T->[2]; #                 $NL = $T->return_attr();

                if(defined $$NL{content} and length $$NL{content} and (
                    defined $$NL{'http-equiv'} &&  $$NL{'http-equiv'} =~ /refresh/i
                    or
                    defined $$NL{'name'} &&  $$NL{'name'} =~ /refresh/i
                    ) ) {

                    my( $timeout, $url ) = split m{;\s*?URL=}i, $$NL{content},2;
                    my $base = $self->{_base};
                    $$NL{url} = URI->new_abs( $url, $base ) if $base;
                    $$NL{url} = $url unless exists $$NL{url};
                    $$NL{timeout} = $timeout if $timeout;
                }
            }

            ## In case we got nested tags
            if(@TEXT) {
                $TEXT[-1]->{_TEXT} .= $T->[-1] ; #                 $TEXT[-1]->{_TEXT} .= $T->as_is;
            }

## Text?
        }elsif($T->[0] eq 'T' ) { #         }elsif($T->is_text) {
            $TEXT[-1]->{_TEXT} .= $T->[-2]  if @TEXT; #             $TEXT[-1]->{_TEXT} .= $T->as_is if @TEXT;
## Declaration?
        }elsif($T->[0] eq 'D' ) { #         }elsif($T->is_declaration) {
## We look at declarations, to get anly custom .dtd's (tis linky)
            my $text = $T->[-1] ; #             my $text = $T->as_is;
            if( $text =~ m{ SYSTEM \s \" ( [^\"]* ) \" > $ }ix ) {
                $NL = { raw => $text, url => $1, tag => '!doctype' };
            }
## End tag?
        }elsif($T->[0] eq 'E' ){ #         }elsif($T->is_end_tag){
## these be ignored (maybe not in between <a...></a> tags
## unless we're stacking (bug #5723)
            if(@TEXT and exists $TAGS{$Tag}) {
                $TEXT[-1]->{_TEXT} .= $T->[-1] ; #                 $TEXT[-1]->{_TEXT} .= $T->as_is;
                my $pop = pop @TEXT;
                $TEXT[-1]->{_TEXT} .= $pop->{_TEXT} if @TEXT;
                $pop->{_TEXT} = _stripHTML( \$pop->{_TEXT} ) if $self->strip;
                $self->{_cb}->($self, $pop) if exists $self->{_cb};
            }
        }

        if(defined $NL) {
            $$NL{tag} = $Tag;

            my $base = $self->{_base};

            for my $at( @VALID_URL_ATTRIBUTES ) {
                if( exists $$NL{$at} ) {
                    $$NL{$at} = URI->new_abs( $$NL{$at}, $base) if $base;
                }
            }

            if(exists $self->{_cb}) {
                $self->{_cb}->($self, $NL ) if not $got_TAGS_IN_NEED or not @TEXT; #bug#5470
            } else {
                push @{$self->{_LINKS}}, $NL;
            }
        }
    }## endof while (my $token = $p->get_token)

    undef $self->{_tp};
    return();
}

sub links {
    my $self = shift;



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