I don't like using long and complex regexes that may break. The
URI module is built to parse URIs; why forgo it? On the other hand, all solutions to parse HTML properly require a lot of coding; so to pick out the URLs, we make as few assumptions as possible so that a very simple (and therefor robust) regex will do the trick. The following code only assumes there are links that have a sectionId parameter; we want its value, and we want the link text, minus any tags (whether
<span> pairs or something completely different).
#!/usr/bin/perl -w
use strict;
use URI;
# in the realworld, it comes from somewhere else
my $page_content = <<'EOT';
<a href="thepage.jsp?siteId=1§ionId=443&">
<span class="small">Geography</span></a>
EOT
# the following regex will simply catch any anchor tags,
# making no assumptions about their structure
while($page_content =~ /<a\s[^>]*?href="([^"]+)"[^>]*>(.*?)<\/a>/sgi)
+{
my $url = new URI $1;
my %params = $url->query_form; # now we let URI do the dirty job f
+or us
next unless exists $params{sectionId}; # was there a sectionId par
+ameter?
# if we're still in the loop here, there was
my $text = $2;
$text =~ s/<[^>]*>//sgi; # strip all tags from the anchor's inner
+text
$text =~ s/^\s+//sgi; # then strip any whitespace from the front
$text =~ s/\s+$//sgi; # and from the end
print "$params{sectionId},$text\n"; # some pretty output
}
____________Makeshifts last the longest.
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