mirror of
https://github.com/pragma-/pbot.git
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349 lines
11 KiB
Perl
349 lines
11 KiB
Perl
# File: UrlTitles.pm
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#
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# Purpose: Display titles of URLs in channel messages.
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# SPDX-FileCopyrightText: 2009-2023 Pragmatic Software <pragma78@gmail.com>
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# SPDX-License-Identifier: MIT
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package PBot::Plugin::UrlTitles;
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use parent 'PBot::Plugin::Base';
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use PBot::Imports;
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use Encode;
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use Text::Levenshtein::XS qw(distance);
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use LWP::UserAgent::Paranoid;
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use HTML::Entities;
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use JSON::XS;
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use constant {
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TIMEOUT => 30,
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MAX_SIZE => 1024 * 800,
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};
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sub initialize {
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my ($self, %conf) = @_;
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# remember recent titles so we don't repeat them too often
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my $filename = $self->{pbot}->{registry}->get_value('general', 'data_dir') . '/url-title.hist';
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$self->{history} = PBot::Core::Storage::DualIndexHashObject->new(
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pbot => $self->{pbot},
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name => 'URL title history',
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filename => $filename,
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);
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$self->{history}->load;
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# can be overridden per-channel
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$self->{pbot}->{registry}->add_default('text', 'general', 'show_url_titles', $conf{show_url_titles} // 1);
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# handle these events
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$self->{pbot}->{event_dispatcher}->register_handler('irc.public', sub { $self->show_url_titles(@_) });
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$self->{pbot}->{event_dispatcher}->register_handler('irc.caction', sub { $self->show_url_titles(@_) });
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}
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sub unload {
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my ($self) = @_;
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.public');
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$self->{pbot}->{event_dispatcher}->remove_handler('irc.caction');
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}
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sub is_ignored_url {
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my ($self, $url) = @_;
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return 1 if $url =~ m{https://asciinema.org}i;
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return 1 if $url =~ m{https?://tpcg.io/}i;
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return 1 if $url =~ m/bootlin.com/i;
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return 1 if $url =~ m{https?://matrix\.to}i;
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return 1 if $url =~ m{https?://.*\.c$}i;
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return 1 if $url =~ m{https?://.*\.h$}i;
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return 1 if $url =~ m{https?://ibb.co/}i;
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return 1 if $url =~ m{https?://.*onlinegdb.com}i;
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return 1 if $url =~ m{googlesource.com/}i;
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return 1 if $url =~ m{https?://git}i and $url !~ /commit/i and $url !~ /github.com/;
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return 1 if $url =~ m{https://.*swissborg.com}i;
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return 1 if $url =~ m{https://streamable.com}i;
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return 1 if $url =~ m{https://matrix.org}i;
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return 1 if $url =~ m{https?://coliru\..*}i;
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return 1 if $url =~ m{localhost}i;
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return 1 if $url =~ m{127}i;
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return 1 if $url =~ m{192.168}i;
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return 1 if $url =~ m{file://}i;
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return 1 if $url =~ m{/src/}i;
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return 1 if $url =~ m{/trunk/}i;
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return 1 if $url =~ m{\.\.}i;
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return 1 if $url =~ m{https?://www.irccloud.com/pastebin}i;
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return 1 if $url =~ m{http://smuj.ca/cl}i;
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return 1 if $url =~ m{/man\d+/}i;
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return 1 if $url =~ m{godbolt.org}i;
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return 1 if $url =~ m{man\.cgi}i;
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return 1 if $url =~ m{wandbox}i;
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return 1 if $url =~ m{ebay.com/itm}i;
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return 1 if $url =~ m/prntscr.com/i;
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return 1 if $url =~ m/imgbin.org/i;
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return 1 if $url =~ m/jsfiddle.net/i;
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return 1 if $url =~ m/port70.net/i;
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return 1 if $url =~ m/notabug.org/i;
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return 1 if $url =~ m/flickr.com/i;
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return 1 if $url =~ m{www.open-std.org/jtc1/sc22/wg14/www/docs/dr}i;
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return 1 if $url =~ m/cheezburger/i;
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return 1 if $url =~ m/rafb.me/i;
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return 1 if $url =~ m/rextester.com/i;
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return 1 if $url =~ m/explosm.net/i;
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return 1 if $url =~ m/stackoverflow.com/i;
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return 1 if $url =~ m/scratch.mit.edu/i;
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return 1 if $url =~ m/c-faq.com/i;
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return 1 if $url =~ m/imgur.com/i;
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return 1 if $url =~ m/sprunge.us/i;
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return 1 if $url =~ m/pastebin.ws/i;
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return 1 if $url =~ m/hastebin.com/i;
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return 1 if $url =~ m/lmgtfy.com/i;
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return 1 if $url =~ m/gyazo/i;
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return 1 if $url =~ m/imagebin/i;
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return 1 if $url =~ m/\/wiki\//i;
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return 1 if $url =~ m!github.com/.*/tree/.*/source/.*!i;
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return 1 if $url =~ m!github.com/.*/commits/.*!i;
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return 1 if $url =~ m!/blob/!i;
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return 1 if $url =~ m/wiki.osdev.org/i;
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return 1 if $url =~ m/wikipedia.org/i;
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return 1 if $url =~ m/fukung.net/i;
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return 1 if $url =~ m/\/paste\//i;
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return 1 if $url =~ m/paste\./i;
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return 1 if $url =~ m/pastie/i;
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return 1 if $url =~ m/ideone.com/i;
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return 1 if $url =~ m/codepad.org/i;
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return 1 if $url =~ m/^http\:\/\/past(e|ing)\./i;
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return 1 if $url =~ m/past(?:e|ing).*\.(?:com|org|net|ch|ca|de|uk|info)/i;
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# not ignored
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return 0;
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}
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sub is_ignored_title {
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my ($self, $title) = @_;
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return 1 if $title =~ m{dive into reddit}i;
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return 1 if $title =~ m{^Loading}i;
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return 1 if $title =~ m{streamable}i;
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return 1 if $title =~ m{^IBM Knowledge Center$}i;
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return 1 if $title =~ m{Freenode head of infrastructure}i;
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return 1 if $title =~ m/^Coliru Viewer$/i;
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return 1 if $title =~ m/^Gerrit Code Review$/i;
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return 1 if $title =~ m/^Public Git Hosting -/i;
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return 1 if $title =~ m/git\/blob/i;
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return 1 if $title =~ m/\sdiff\s/i;
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return 1 if $title =~ m/- Google Search$/;
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return 1 if $title =~ m/linux cross reference/i;
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return 1 if $title =~ m/screenshot/i;
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return 1 if $title =~ m/pastebin/i;
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return 1 if $title =~ m/past[ea]/i;
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return 1 if $title =~ m/^[0-9_-]+$/;
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return 1 if $title =~ m/^Index of \S+$/;
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return 1 if $title =~ m/(?:sign up|login)/i;
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# not ignored
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return 0;
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}
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sub get_title {
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my ($self, $context) = @_;
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my $url = $context->{arguments};
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my $ua = LWP::UserAgent::Paranoid->new(request_timeout => TIMEOUT);
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my $user_agent;
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if ($url =~ /twitter.com/) {
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$user_agent = 'Mozilla/5.0 (compatible; Googlebot/2.1; +https://www.google.com/bot.html)',
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} else {
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$user_agent = 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:98.0) Gecko/20100101 Firefox/98.0';
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}
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$ua->agent($user_agent);
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$ua->max_size(MAX_SIZE);
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my $response = $ua->get($url);
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if (not $response->is_success) {
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$self->{pbot}->{logger}->log("Error getting URL [$url]\n");
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return 0;
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}
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my $title;
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if ($response->title) {
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$title = decode('UTF-8', $response->title);
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} else {
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my $text = $response->decoded_content;
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if ($text =~ m/<title>(.*?)<\/title>/msi) {
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$title = $1;
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}
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}
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if (not defined $title or not length $title) {
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$self->{pbot}->{logger}->log("No title for URL [$url]\n");
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return 0;
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}
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$title = decode_entities($title);
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# disregard one-word titles; these aren't usually interesting
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# (and are usually already present in the URL itself)
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return 0 if $title !~ /\s/;
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# truncate long title
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if (length $title > 400) {
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$title = substr($title, 0, 400);
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$title = "$title [...]";
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}
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# fuzzy compare file against title
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my ($file) = $url =~ m/.*\/(.*)$/;
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$file =~ s/[_-]+/ /g;
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my $distance = distance(lc $file, lc $title);
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my $length = (length $file > length $title) ? length $file : length $title;
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# disregard title if 75%+ similiar to file
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return 0 if $distance / $length < 0.75;
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# disregard ignored titles
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return 0 if $self->is_ignored_title($title);
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# send result back to parent
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$context->{result} = $title;
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$context->{url} = $url;
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}
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sub title_pipe_reader {
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my ($self, $pid, $buf) = @_;
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# retrieve context object from child
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my $context = decode_json $buf or do {
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$self->{pbot}->{logger}->log("Failed to decode bad json: [$buf]\n");
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return;
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};
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# context is no longer forked
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delete $context->{pid};
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my $title = delete $context->{result};
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return 0 if not defined $title or not length $title;
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# disregard recent titles (15 min)
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my $data = $self->{history}->get_data($context->{from}, $title);
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if (defined $data) {
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if (time - $data->{timestamp} < 900) {
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return 0;
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}
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}
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# update history
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$data = {
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url => $context->{url},
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timestamp => time,
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hostmask => $context->{hostmask},
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};
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$self->{history}->add($context->{from}, $title, $data, 0, 1);
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# set result
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$context->{result} = "Title of $context->{nick}'s link: $title";
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# send result off to bot to be handled
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$context->{checkflood} = 1;
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$self->{pbot}->{interpreter}->handle_result($context);
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}
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sub show_url_titles {
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my ($self, $event_type, $event) = @_;
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my ($nick, $user, $host) = (
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$event->nick,
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$event->user,
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$event->host
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);
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my ($channel, $msg) = (
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$event->{to}[0],
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$event->{args}[0]
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);
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# get show_url_titles for channel or true if not defined
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my $enabled = $self->{pbot}->{registry}->get_value($channel, 'show_url_titles') // 1;
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# disabled in channel
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return 0 if !$enabled;
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return 0 if $self->{pbot}->{registry}->get_value($channel, 'no_url_titles');
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# disabled globally (unless allowed by channel)
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return 0 if !$self->{pbot}->{registry}->get_value('general', 'show_url_titles') && !$enabled;
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# message already handled by bot command
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return 0 if $event->{interpreted};
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# no url in message
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return 0 if not $msg =~ m/https?:\/\/[^\s]/;
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# ignored user
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return 0 if $self->{pbot}->{ignorelist}->is_ignored($channel, "$nick!$user\@$host");
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# no titles for unidentified users in +z channels
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my $chanmodes = $self->{pbot}->{channels}->get_meta($channel, 'MODE');
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if (defined $chanmodes and $chanmodes =~ m/z/) {
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my $account = $self->{pbot}->{messagehistory}->{database}->get_message_account($nick, $user, $host);
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my $nickserv = $self->{pbot}->{messagehistory}->{database}->get_current_nickserv_account($account);
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return 0 if not defined $nickserv or not length $nickserv;
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}
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my $count = 0;
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while ($msg =~ s/(https?:\/\/[^\s]+)//i && ++$count <= 3) {
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my $url = $1;
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$url =~ s/\W$//;
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$url =~ s,https://mobile.twitter.com,https://twitter.com,i;
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if ($self->{pbot}->{antispam}->is_spam('url', $url)) {
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$self->{pbot}->{logger}->log("Ignoring spam URL $url\n");
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next;
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}
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if ($self->is_ignored_url($url)) {
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$self->{pbot}->{logger}->log("Ignoring URL $url\n");
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next;
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}
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my $context = {
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from => $channel,
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nick => $nick,
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user => $user,
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host => $host,
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hostmask => "$nick!$user\@$host",
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command => "title $nick $url",
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root_channel => $channel,
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root_keyword => "title",
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keyword => "title",
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arguments => $url,
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suppress_no_output => 1,
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};
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$self->{pbot}->{process_manager}->execute_process(
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$context,
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sub { $self->get_title(@_) },
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30,
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sub { $self->title_pipe_reader(@_) },
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);
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}
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return 0;
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}
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1;
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