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Re: Parsing HTML/XML with Regular Expressions (HTML::Parser)

by tangent (Vicar)
on Oct 18, 2017 at 02:18 UTC ( #1201544=note: print w/replies, xml ) Need Help??


in reply to Parsing HTML/XML with Regular Expressions

My favourite module for parsing HTML is HTML::TreeBuilder::XPath, but it misses out on the first div (id=Zero). It uses HTML::Parser internally but I could not find a way to pass the necessary attribute empty_element_tags=>1 from HTML::TreeBuilder to HTML::Parser.

So here is a fairly verbose version using just HTML::Parser:

use HTML::Parser; my $file = 'example.html'; my ($in_div,$in_wanted_div) = (0,0); my @result; my $parser = HTML::Parser->new( api_version => 3, start_h => [\&start, "tagname, attr"], text_h => [\&text, "dtext"], end_h => [\&end, "tagname"], empty_element_tags => 1, ); $parser->parse_file($file); print join(', ',@result); sub start { my ($tag, $attr) = @_; return unless ($tag eq 'div'); if (exists $attr->{'class'} and $attr->{'class'} eq 'data') { $in_div = 1; $in_wanted_div = 1; push(@result, "$attr->{'id'}="); } else { $in_div++; } } sub text { my ($text) = @_; return unless $in_wanted_div; $text =~ s/\W//g; $result[-1] .= $text; } sub end { my ($tag) = @_; return unless ($tag eq 'div'); $in_div--; $in_wanted_div = 0 if not $in_div; }
Output:
Zero=, One=Monday, Two=Tuesday, Three=Wednesday, Four=Thursday, Five=F +riday, Six=Saturday, Seven=Sunday

Replies are listed 'Best First'.
Re^2: Parsing HTML/XML with Regular Expressions (HTML::Parser)
by fishy (Friar) on Oct 18, 2017 at 07:06 UTC

    Wow!
    Many thanks.

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