+# Copyright (C) 2016 all contributors <meta@public-inbox.org>
+# License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
+use strict;
+use warnings;
+use Test::More;
+use File::Temp qw/tempdir/;
+use IO::Socket;
+use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD);
+use Socket qw(SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
+use POSIX qw(dup2 setsid);
+use Cwd qw(getcwd);
+
+my $git_dir = $ENV{GIANT_GIT_DIR};
+plan 'skip_all' => 'GIANT_GIT_DIR not defined' unless $git_dir;
+foreach my $mod (qw(Danga::Socket
+ Plack::Util Plack::Request Plack::Builder
+ HTTP::Date HTTP::Status Net::HTTP)) {
+ eval "require $mod";
+ plan skip_all => "$mod missing for git-http-backend.t" if $@;
+}
+my $psgi = getcwd()."/t/git-http-backend.psgi";
+my $tmpdir = tempdir('pi-git-http-backend-XXXXXX', TMPDIR => 1, CLEANUP => 1);
+my $err = "$tmpdir/stderr.log";
+my $out = "$tmpdir/stdout.log";
+my $httpd = 'blib/script/public-inbox-httpd';
+my %opts = (
+ LocalAddr => '127.0.0.1',
+ ReuseAddr => 1,
+ Proto => 'tcp',
+ Type => SOCK_STREAM,
+ Listen => 1024,
+);
+my $sock = IO::Socket::INET->new(%opts);
+my $host = $sock->sockhost;
+my $port = $sock->sockport;
+my $pid;
+END { kill 'TERM', $pid if defined $pid };
+
+my $get_maxrss = sub {
+ my $http = Net::HTTP->new(Host => "$host:$port");
+ ok($http, 'Net::HTTP object created for maxrss');
+ $http->write_request(GET => '/');
+ my ($code, $mess, %h) = $http->read_response_headers;
+ is($code, 200, 'success reading maxrss');
+ my $n = $http->read_entity_body(my $buf, 256);
+ ok(defined $n, 'read response body');
+ like($buf, qr/\A\d+\n\z/, 'got memory response');
+ ok(int($buf) > 0, 'got non-zero memory response');
+ int($buf);
+};
+
+{
+ ok($sock, 'sock created');
+ $pid = fork;
+ if ($pid == 0) { # pretend to be systemd
+ fcntl($sock, F_SETFD, 0);
+ dup2(fileno($sock), 3) or die "dup2 failed: $!\n";
+ $ENV{LISTEN_PID} = $$;
+ $ENV{LISTEN_FDS} = 1;
+ $ENV{TEST_CHUNK} = '1';
+ exec $httpd, "--stdout=$out", "--stderr=$err", $psgi;
+ die "FAIL: $!\n";
+ }
+ ok(defined $pid, 'forked httpd process successfully');
+}
+my $mem_a = $get_maxrss->();
+
+SKIP: {
+ my $max = 0;
+ my $pack;
+ my $glob = "$git_dir/objects/pack/pack-*.pack";
+ foreach my $f (glob($glob)) {
+ my $n = -s $f;
+ if ($n > $max) {
+ $max = $n;
+ $pack = $f;
+ }
+ }
+ skip "no packs found in $git_dir" unless defined $pack;
+ if ($pack !~ m!(/objects/pack/pack-[a-f0-9]{40}.pack)\z!) {
+ skip "bad pack name: $pack";
+ }
+ my $url = $1;
+ my $http = Net::HTTP->new(Host => "$host:$port");
+ ok($http, 'Net::HTTP object created');
+ $http->write_request(GET => $url);
+ my ($code, $mess, %h) = $http->read_response_headers;
+ is(200, $code, 'got 200 success for pack');
+ is($max, $h{'Content-Length'}, 'got expected Content-Length for pack');
+ foreach my $i (1..3) {
+ sleep 1;
+ my $diff = $get_maxrss->() - $mem_a;
+ note "${diff}K memory increase after $i seconds";
+ ok($diff < 1024, 'no bloating caused by slow dumb client');
+ }
+}
+
+{
+ my $c = fork;
+ if ($c == 0) {
+ setsid();
+ exec qw(git clone -q --mirror), "http://$host:$port/",
+ "$tmpdir/mirror.git";
+ die "Failed start git clone: $!\n";
+ }
+ select(undef, undef, undef, 0.1);
+ foreach my $i (1..10) {
+ is(1, kill('STOP', -$c), 'signaled clone STOP');
+ sleep 1;
+ ok(kill('CONT', -$c), 'continued clone');
+ my $diff = $get_maxrss->() - $mem_a;
+ note "${diff}K memory increase after $i seconds";
+ ok($diff < 2048, 'no bloating caused by slow smart client');
+ }
+ ok(kill('CONT', -$c), 'continued clone');
+ is($c, waitpid($c, 0), 'reaped wayward slow clone');
+ is($?, 0, 'clone did not error out');
+ note 'clone done, fsck-ing clone result...';
+ is(0, system("git", "--git-dir=$tmpdir/mirror.git",
+ qw(fsck --no-progress)),
+ 'fsck did not report corruption');
+
+ my $diff = $get_maxrss->() - $mem_a;
+ note "${diff}K memory increase after smart clone";
+ ok($diff < 2048, 'no bloating caused by slow smart client');
+}
+
+{
+ ok(kill('TERM', $pid), 'killed httpd');
+ $pid = undef;
+ waitpid(-1, 0);
+}
+
+done_testing();