[PATCH] config: fix NewsWWW fallback for newsgroups in HTTP URLs

[Eric Wong]

Oops, added a test to prevent regressions while we're at it.
---
 lib/PublicInbox/Config.pm  |  4 +++-
 lib/PublicInbox/NewsWWW.pm |  3 ++-
 t/plack.t                  | 15 +++++++++++++++
 3 files changed, 20 insertions(+), 2 deletions(-)

diff --git a/lib/PublicInbox/Config.pm b/lib/PublicInbox/Config.pm
index 935b044..35b24af 100644
--- a/lib/PublicInbox/Config.pm
+++ b/lib/PublicInbox/Config.pm
@@ -56,7 +56,8 @@ sub lookup_name {
        my ($self, $name) = @_;
        my $rv = $self->{-by_name}->{$name};
        return $rv if $rv;
-       $self->{-by_name}->{$name} = _fill($self, "publicinbox.$name");
+       $rv = _fill($self, "publicinbox.$name") or return;
+       $self->{-by_name}->{$name} = $rv;
 }
 
 sub get {
@@ -118,6 +119,7 @@ sub _fill {
                my $v = $self->{"$pfx.$k"};
                $rv->{$k} = $v if defined $v;
        }
+       return unless $rv->{mainrepo};
        my $inbox = $pfx;
        $inbox =~ s/\Apublicinbox\.//;
        $rv->{name} = $inbox;
diff --git a/lib/PublicInbox/NewsWWW.pm b/lib/PublicInbox/NewsWWW.pm
index 19eb596..5357059 100644
--- a/lib/PublicInbox/NewsWWW.pm
+++ b/lib/PublicInbox/NewsWWW.pm
@@ -30,7 +30,6 @@ sub call {
        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) {
@@ -41,6 +40,8 @@ sub call {
                        }
                }
 
+               my $h = [ Location => $url, 'Content-Type' => 'text/plain' ];
+
                return [ $code, $h, [ "Redirecting to $url\n" ] ]
        }
        [ 404, [ 'Content-Type' => 'text/plain' ], [] ];
diff --git a/t/plack.t b/t/plack.t
index c8dd7bf..04680b2 100644
--- a/t/plack.t
+++ b/t/plack.t
@@ -30,6 +30,8 @@ foreach my $mod (@mods) { use_ok $mod; }
        my %cfg = (
                "$cfgpfx.address" => $addr,
                "$cfgpfx.mainrepo" => $maindir,
+               "$cfgpfx.url" => 'http://example.com/test/',
+               "$cfgpfx.newsgroup" => 'inbox.test',
        );
        while (my ($k,$v) = each %cfg) {
                is(0, system(qw(git config --file), $pi_config, $k, $v),
@@ -60,6 +62,19 @@ EOF
                require $psgi;
        };
 
+       # redirect with newsgroup
+       test_psgi($app, sub {
+               my ($cb) = @_;
+               my $from = 'http://example.com/inbox.test';
+               my $to = 'http://example.com/test/';
+               my $res = $cb->(GET($from));
+               is($res->code, 301, 'is permanent redirect');
+               is($to, $res->header('Location'), 'redirect location matches');
+               $from .= '/';
+               is($res->code, 301, 'is permanent redirect');
+               is($to, $res->header('Location'), 'redirect location matches');
+       });
+
        # redirect with trailing /
        test_psgi($app, sub {
                my ($cb) = @_;
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