forked from github/kensanata.oddmuse
67 lines
1.9 KiB
Perl
67 lines
1.9 KiB
Perl
#! /usr/bin/perl -w
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# Copyright (C) 2019 Alex Schroeder <alex@gnu.org>
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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=head1 Webmention from one site to another
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If you link from page A on your site to page B on some other site, you can
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invoke this script with the command-line arguments A and B. In theory, this will
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create a link back from B to A, letting them and all their visitors know that
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you wrote something in response.
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=cut
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use Modern::Perl;
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use XML::LibXML;
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use LWP::UserAgent;
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use Data::Dumper;
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if (@ARGV != 2) {
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die "Usage: webmention FROM TO\n";
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}
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my ($from, $to) = @ARGV;
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my $ua = LWP::UserAgent->new(agent => "Oddmuse Webmention Client/0.1");
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print "Getting $to\n";
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my $response = $ua->get($to);
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if (!$response->is_success) {
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die $response->status_line;
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}
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print "Parsing $to\n";
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my $data = $response->decoded_content;
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my $parser = XML::LibXML->new(recover => 2);
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my $dom = $parser->load_html(string => $data);
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my $webmention = $dom->findvalue('//link[@rel="webmention"]/@href');
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if (!$webmention) {
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die "Webmention URL not found in $to\n";
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}
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print "Webmention URL is $webmention\n";
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$response = $ua->post($webmention, { source => $from, target => $to });
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my $message = $response->code . " " . $response->message . "\n";
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if ($response->is_success) {
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print $message;
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} else {
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die $message;
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}
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