# Copyright (C) 2016 all contributors
# License: AGPL-3.0+
#
# Plack app redirector for mapping /$NEWSGROUP requests to
# the appropriate /$LISTNAME in PublicInbox::WWW because some
# auto-linkifiers cannot handle nntp:// redirects properly.
# This is also used directly by PublicInbox::WWW
package PublicInbox::NewsWWW;
use strict;
use warnings;
use PublicInbox::Config;
use URI::Escape qw(uri_escape_utf8);
sub new {
my ($class, $pi_config) = @_;
$pi_config ||= PublicInbox::Config->new;
bless { pi_config => $pi_config }, $class;
}
sub call {
my ($self, $env) = @_;
my $ng_map = $self->newsgroup_map;
my $path = $env->{PATH_INFO};
$path =~ s!\A/+!!;
$path =~ s!/+\z!!;
# some links may have the article number in them:
# /inbox.foo.bar/123456
my ($ng, $article) = split(m!/+!, $path, 2);
if (my $info = $ng_map->{$ng}) {
my $url = PublicInbox::Hval::prurl($env, $info->{url});
my $code = 301;
my $h = [ Location => $url, 'Content-Type' => 'text/plain' ];
if (defined $article && $article =~ /\A\d+\z/) {
my $mid = eval { ng_mid_for($ng, $info, $article) };
if (defined $mid) {
# article IDs are not stable across clones,
# do not encourage caching/bookmarking them
$code = 302;
$url .= uri_escape_utf8($mid) . '/';
}
}
return [ $code, $h, [ "Redirecting to $url\n" ] ]
}
[ 404, [ 'Content-Type' => 'text/plain' ], [] ];
}
sub ng_mid_for {
my ($ng, $info, $article) = @_;
# may fail due to lack of Danga::Socket
# for defer_weaken:
require PublicInbox::NewsGroup;
$ng = $info->{ng} ||=
PublicInbox::NewsGroup->new($ng, $info->{git_dir}, '');
$ng->mm->mid_for($article);
}
sub newsgroup_map {
my ($self) = @_;
my $rv;
$rv = $self->{ng_map} and return $rv;
my $pi_config = $self->{pi_config};
my %ng_map;
foreach my $k (keys %$pi_config) {
$k =~ /\Apublicinbox\.([^\.]+)\.mainrepo\z/ or next;
my $listname = $1;
my $git_dir = $pi_config->{"publicinbox.$listname.mainrepo"};
my $url = $pi_config->{"publicinbox.$listname.url"};
defined $url or next;
my $ng = $pi_config->{"publicinbox.$listname.newsgroup"};
next if (!defined $ng) || ($ng eq ''); # disabled
$url =~ m!/\z! or $url .= '/';
$ng_map{$ng} = { url => $url, git_dir => $git_dir };
}
$self->{ng_map} = \%ng_map;
}
1;