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#!/usr/bin/perl
# (C) Sergey Kandaurov
# (C) Nginx, Inc.
# Tests for stream proxy module, the proxy_requests directive.
###############################################################################
use warnings;
use strict;
use Test::More;
BEGIN { use FindBin; chdir($FindBin::Bin); }
use lib 'lib';
use Test::Nginx;
use Test::Nginx::Stream qw/ dgram /;
###############################################################################
select STDERR; $| = 1;
select STDOUT; $| = 1;
my $t = Test::Nginx->new()->has(qw/stream udp/)->plan(26)
->write_file_expand('nginx.conf', <<'EOF');
%%TEST_GLOBALS%%
daemon off;
events {
}
stream {
%%TEST_GLOBALS_STREAM%%
proxy_timeout 2100ms;
log_format status $status;
server {
listen 127.0.0.1:%%PORT_8980_UDP%% udp;
proxy_pass 127.0.0.1:%%PORT_8990_UDP%%;
proxy_requests 0;
}
server {
listen 127.0.0.1:%%PORT_8981_UDP%% udp;
proxy_pass 127.0.0.1:%%PORT_8990_UDP%%;
proxy_requests 1;
}
server {
listen 127.0.0.1:%%PORT_8982_UDP%% udp;
proxy_pass 127.0.0.1:%%PORT_8990_UDP%%;
proxy_requests 2;
}
server {
listen 127.0.0.1:%%PORT_8983_UDP%% udp;
proxy_pass 127.0.0.1:%%PORT_8990_UDP%%;
}
server {
listen 127.0.0.1:%%PORT_8984_UDP%% udp;
proxy_pass 127.0.0.1:%%PORT_8991_UDP%%;
proxy_requests 2;
access_log %%TESTDIR%%/s.log status;
}
server {
listen 127.0.0.1:%%PORT_8985_UDP%% udp;
proxy_pass 127.0.0.1:%%PORT_8990_UDP%%;
proxy_requests 2;
proxy_responses 2;
access_log %%TESTDIR%%/s2.log status;
}
}
EOF
$t->run_daemon(\&udp_daemon, $t, port(8990));
$t->run_daemon(\&udp_daemon, $t, port(8991));
$t->run();
$t->waitforfile($t->testdir . '/' . port(8990));
$t->waitforfile($t->testdir . '/' . port(8991));
###############################################################################
# proxy_requests 0, binding is not dropped across streams
my $s = dgram('127.0.0.1:' . port(8980));
my $n = $s->io('1', read => 1);
ok($n, 'requests 0 create');
is($s->read(), '1', 'requests 0 create - response');
is($s->io('1', read => 1), $n, 'requests 0 second - binding saved');
is($s->read(), '1', 'requests 0 second - response');
is($s->io('1', read => 1), $n, 'requests 0 follow - binding saved');
is($s->read(), '1', 'requests 0 follow - response');
# proxy_requests 1, binding is dropped on every next stream
$s = dgram('127.0.0.1:' . port(8981));
$n = $s->io('1', read => 1);
ok($n, 'requests 1 create');
is($s->read(), '1', 'requests 1 create - response');
isnt($s->io('1', read => 1), $n, 'requests 1 second - binding lost');
is($s->read(), '1', 'requests 1 second - response');
# proxy_requests 2, binding is dropped on every second stream
$s = dgram('127.0.0.1:' . port(8982));
$n = $s->io('1', read => 1);
ok($n, 'requests 2 create');
is($s->read(), '1', 'requests 2 create - response');
is($s->io('1', read => 1), $n, 'requests 2 second - binding saved');
is($s->read(), '1', 'requests 2 second - response');
isnt($s->io('1', read => 1), $n, 'requests 2 follow - binding lost');
is($s->read(), '1', 'requests 2 follow - response');
# proxy_requests unset, binding is not dropped across streams
$s = dgram('127.0.0.1:' . port(8983));
$n = $s->io('1', read => 1);
ok($n, 'requests unset create');
is($s->read(), '1', 'requests unset create - response');
is($s->io('1', read => 1), $n, 'requests unset second - binding saved');
is($s->read(), '1', 'requests unset second - response');
is($s->io('1', read => 1), $n, 'requests unset follow - binding saved');
is($s->read(), '1', 'requests unset follow - response');
# proxy_requests 2, with slow backend
# client sends 5 packets, each responded with 3 packets
# expects all packets proxied from backend, the last (uneven) session succeed
$s = dgram('127.0.0.1:' . port(8984));
$s->write('2') for 1 .. 5;
my $b = join ' ', map { $s->read() } (1 .. 15);
like($b, qr/^(\d+ 1 2) \1 (?!\1)(\d+ 1 2) \2 (?!\2)\d+ 1 2$/, 'slow backend');
# proxy_requests 2, proxy_responses 2
# client sends 5 packets, each responded with 2 packets
# expects all packets proxied from backend, the last (uneven) session succeed
$s = dgram('127.0.0.1:' . port(8985));
$s->write('1') for 1 .. 5;
$b = join ' ', map { $s->read() } (1 .. 10);
SKIP: {
skip 'session could early terminate', 1 unless $ENV{TEST_NGINX_UNSAFE};
like($b, qr/^(\d+ 1) \1 (?!\1)(\d+ 1) \2 (?!\2)\d+ 1$/, 'requests - responses');
}
$t->stop();
is($t->read_file('s.log'), <<EOF, 'uneven session status - slow backend');
200
200
200
EOF
is($t->read_file('s2.log'), <<EOF, 'uneven session status - responses');
200
200
200
EOF
###############################################################################
sub udp_daemon {
my ($t, $port) = @_;
my $server = IO::Socket::INET->new(
Proto => 'udp',
LocalAddr => "127.0.0.1:$port",
Reuse => 1
)
or die "Can't create listening socket: $!\n";
# signal we are ready
open my $fh, '>', $t->testdir() . "/$port";
close $fh;
my $slp = 1 if $port == port(8991);
while (1) {
$server->recv(my $buffer, 65536);
sleep 1, $slp = 0 if $slp;
$server->send($server->peerport());
$server->send($_) for (1 .. $buffer);
}
}
###############################################################################