I don't like using regular expressions on HTML documents, so my approach would be to use a proper HTML parser instead. This has a number of benefits, including the decoding of entities in the HTML representing the email address.
This code uses LWP::UserAgent to fetch the HTML document, HTML::TokeParser to read it, and URI to parse the URIs in it.
#!/usr/bin/perl
use strict;
use warnings;
use LWP::UserAgent;
use HTML::TokeParser;
use URI;
my $ua = LWP::UserAgent->new;
$ua->timeout(10);
my $root_uri = 'http://example.com/';
my $response = $ua->get($root_uri);
if ($response->is_success) {
my $html = $response->decoded_content;
my $p = HTML::TokeParser->new( \$html );
while (my $tag = $p->get_tag('a')) {
my $href = $tag->[1]{href};
next unless $href;
my $uri = URI->new_abs( $href, $root_uri );
next unless ($uri->scheme eq 'mailto');
print $uri->to, "\n";
}
} else {
die $response->status_line;
}
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Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
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Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
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Want more info? How to link
or How to display code and escape characters
are good places to start.
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