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Re: Preserving newlines with Web::Scraper

by haukex (Bishop)
on Dec 25, 2018 at 11:35 UTC ( #1227691=note: print w/replies, xml ) Need Help??


in reply to Preserving newlines with Web::Scraper

It seems that Web::Scraper uses HTML::TreeBuilder::XPath, and HTML::TreeBuilder has an no_space_compacting option that is disabled by default, causing that module to do s/[\n\r\f\t ]+/ /g by default. At the moment I don't see a way to set arbitrary options on the parser via Web::Scraper, this is probably worth opening an issue for.

Two workarounds I see at the moment: replacing Web::Scraper with Web::Scraper::LibXML works for me:

use warnings; use strict; use Data::Dump; use Web::Scraper::LibXML; my $scraper = scraper { process '//p[contains(@class, "myClass")]', 'paragraph' => 'TEXT'; }; dd $scraper->scrape(\<<'END_HTML'); <p class="myClass">Blah Blah Blah </p> END_HTML __END__ { paragraph => "Blah\n\nBlah\n\nBlah\n" }

Or, monkey-patching Web::Scraper::build_tree:

*Web::Scraper::build_tree = sub { my($self, $html) = @_; my $t = HTML::TreeBuilder::XPath->new; $t->store_comments(1) if ($t->can('store_comments')); $t->no_space_compacting(1); $t->ignore_unknown(0); $t->parse($html); $t->eof; $t; };

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Re^2: Preserving newlines with Web::Scraper
by nysus (Parson) on Dec 25, 2018 at 11:40 UTC

    OK, thanks for confirming the issue. You posted seconds before I posted my hack workaround. Using LibXML looks like the way to go, though. Thanks a lot!

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