/
oeis_drafts.pl
156 lines (118 loc) · 4 KB
/
oeis_drafts.pl
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#!/usr/bin/perl
# Daniel "Trizen" Șuteu
# Date: 07 April 2019
# https://github.com/trizen
# Get the list of OEIS drafts and generate an HTML file, highlighting the sequences that need more terms.
use 5.014;
use strict;
use warnings;
use LWP::UserAgent::Cached;
use HTML::Entities qw(decode_entities encode_entities);
require LWP::UserAgent;
require HTTP::Message;
use constant {
USE_TOR_PROXY => 0, # true to use the Tor proxy (127.0.0.1:9050)
};
my $cache_dir = 'cache';
if (not -d $cache_dir) {
mkdir($cache_dir);
}
my $lwp = LWP::UserAgent::Cached->new(
timeout => 60,
show_progress => 1,
agent => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0',
cache_dir => $cache_dir,
ssl_opts => {verify_hostname => 1, SSL_version => 'TLSv1_3'},
nocache_if => sub {
my ($response) = @_;
my $code = $response->code;
return 1 if ($code >= 500); # do not cache any bad response
return 1 if ($code == 401); # don't cache an unauthorized response
return 1 if ($response->request->method ne 'GET'); # cache only GET requests
return;
},
);
my $lwp_uc = LWP::UserAgent->new(
timeout => 60,
show_progress => 1,
agent => 'Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:91.0) Gecko/20100101 Firefox/91.0',
ssl_opts => {verify_hostname => 1, SSL_version => 'TLSv1_3'},
);
{
state $accepted_encodings = HTTP::Message::decodable();
$lwp->default_header('Accept-Encoding' => $accepted_encodings);
$lwp_uc->default_header('Accept-Encoding' => $accepted_encodings);
require LWP::ConnCache;
my $cache = LWP::ConnCache->new;
$cache->total_capacity(undef); # no limit
$lwp->conn_cache($cache);
$lwp_uc->conn_cache($cache);
}
if (USE_TOR_PROXY) {
$lwp->proxy(['http', 'https'], "socks://127.0.0.1:9050");
$lwp_uc->proxy(['http', 'https'], "socks://127.0.0.1:9050");
}
my @all_ids;
my $start = 0;
while (1) {
my $content = $lwp_uc->get("https://oeis.org/draft?start=$start")->decoded_content;
my @ids;
while ($content =~ m{<td><a href="/draft/(A\d+)">A\d+</a>}g) {
push @ids, $1;
}
@ids || last;
push @all_ids, @ids;
$start += 100;
}
say "Found: ", scalar(@all_ids), " ids";
open my $fh, '>:utf8', 'links.html';
print $fh <<'EOF';
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<html>
<head>
<style>
tt { font-family: monospace; font-size: 100%; }
p.editing { font-family: monospace; margin: 10px; text-indent: -10px; word-wrap:break-word;}
p { word-wrap: break-word; }
</style>
<meta http-equiv="content-type" content="text/html; charset=utf-8">
<title>OEIS links</title>
</head>
<body bgcolor=#ffffff>
EOF
#~ say $fh "<ul>";
sub remove_tags {
my ($str) = @_;
$str =~ s/<.*?>//gs;
join(' ', split(' ', $str));
}
my $k = 1;
foreach my $id (@all_ids) {
my $url = "https://oeis.org/draft/$id";
my $content = $lwp->get($url)->decoded_content;
my $more = 0;
if ( $content =~ m{<span title="(.*?)">more</span>}
or $content =~ m{<span title="(.*?)">hard</span>}) {
$more = 1;
}
my $author = '';
my $name = '';
if ($content =~ m{.*<font size=-2>NAME</font>.*?(?!<tt>\s*<del>)<tt>(.*?)</tt>}s) {
$name = remove_tags($1);
}
if ($content =~ m{.*<font size=-2>AUTHOR</font>.*?<ins>(.*?)</ins>}s) {
$author = remove_tags($1);
}
my $tname = $name;
if ($more) {
$tname = "<big><b>$tname</b></big>";
}
say $fh "<pre>" . $tname . " -- $author</pre>";
say $fh "<ul>";
say $fh "<li> [$k] <a href=$url>$url</a> </li>";
say $fh "</ul>";
#say $fh "<li>[$k] <a href=$url>$url</a><br> -- $name -- $author</li>";
++$k;
}
#~ say $fh "</ul>";
say $fh "</body></html>";