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#!/usr/bin/perl
# (C) Andrey Zelenkov
# (C) Nginx, Inc.
# Tests for stream proxy module, limit rate directives.
###############################################################################
use warnings;
use strict;
use Test::More;
use IO::Select;
BEGIN { use FindBin; chdir($FindBin::Bin); }
use lib 'lib';
use Test::Nginx;
use Test::Nginx::Stream qw/ stream /;
###############################################################################
select STDERR; $| = 1;
select STDOUT; $| = 1;
my $t = Test::Nginx->new()->has(qw/stream/)->plan(9)
->write_file_expand('nginx.conf', <<'EOF');
%%TEST_GLOBALS%%
daemon off;
events {
}
stream {
# download and upload rates are set equal to the maximum
# number of bytes transmitted
# proxy_download_rate value comes from following calculations:
# test string length (1000) + whitespace (1) + time string length (10)
proxy_download_rate 1011;
proxy_upload_rate 1000;
server {
listen 127.0.0.1:8081;
proxy_pass 127.0.0.1:8080;
}
server {
listen 127.0.0.1:8082;
proxy_pass 127.0.0.1:8080;
proxy_download_rate 0;
proxy_upload_rate 0;
}
server {
listen 127.0.0.1:8083;
proxy_pass 127.0.0.1:8080;
proxy_download_rate 1;
}
server {
listen 127.0.0.1:8084;
proxy_pass 127.0.0.1:8080;
proxy_upload_rate 1;
}
server {
listen 127.0.0.1:8085;
proxy_pass 127.0.0.1:8080;
proxy_download_rate 250;
}
server {
listen 127.0.0.1:8086;
proxy_pass 127.0.0.1:8087;
proxy_upload_rate 250;
}
}
EOF
$t->run_daemon(\&stream_daemon, port(8080));
$t->run_daemon(\&stream_daemon, port(8087));
$t->run();
$t->waitforsocket('127.0.0.1:' . port(8080));
$t->waitforsocket('127.0.0.1:' . port(8087));
###############################################################################
my $str = '1234567890' x 100;
my %r = response($str, peer => '127.0.0.1:' . port(8081));
is($r{'data'}, $str, 'exact limit');
%r = response($str . 'extra', peer => '127.0.0.1:' . port(8082));
is($r{'data'}, $str . 'extra', 'unlimited');
SKIP: {
skip 'unsafe on VM', 3 unless $ENV{TEST_NGINX_UNSAFE};
# if interaction between backend and client is slow then proxy can add extra
# bytes to upload/download data
%r = response($str . 'extra', peer => '127.0.0.1:' . port(8081));
is($r{'data'}, $str, 'limited');
%r = response($str, peer => '127.0.0.1:' . port(8083), readonce => 1);
is($r{'data'}, '1', 'download - one byte');
%r = response($str, peer => '127.0.0.1:' . port(8084));
is($r{'data'}, '1', 'upload - one byte');
}
# Five chunks are split with four 1s delays:
# the first four chunks are quarters of test string
# and the fifth one is some extra data from backend.
%r = response($str, peer => '127.0.0.1:' . port(8085));
my $diff = time() - $r{'time'};
cmp_ok($diff, '>=', 4, 'download - time');
is($r{'data'}, $str, 'download - data');
my $time = time();
%r = response($str . 'close', peer => '127.0.0.1:' . port(8086));
$diff = time() - $time;
cmp_ok($diff, '>=', 4, 'upload - time');
is($r{'data'}, $str . 'close', 'upload - data');
###############################################################################
sub response {
my ($data, %extra) = @_;
my $s = stream($extra{peer});
$s->write($data);
$data = '';
while (1) {
my $buf = $s->read();
last unless length($buf);
$data .= $buf;
last if $extra{'readonce'};
}
$data =~ /([\S]*)\s?(\d+)?/;
return ('data' => $1, 'time' => $2)
}
###############################################################################
sub stream_daemon {
my $port = shift;
my $server = IO::Socket::INET->new(
Proto => 'tcp',
LocalAddr => '127.0.0.1',
LocalPort => $port,
Listen => 5,
Reuse => 1
)
or die "Can't create listening socket: $!\n";
my $sel = IO::Select->new($server);
local $SIG{PIPE} = 'IGNORE';
while (my @ready = $sel->can_read) {
foreach my $fh (@ready) {
if ($server == $fh) {
my $new = $fh->accept;
$new->autoflush(1);
$sel->add($new);
} elsif (stream_handle_client($fh)) {
$sel->remove($fh);
$fh->close;
}
}
}
}
sub stream_handle_client {
my ($client) = @_;
log2c("(new connection $client)");
$client->sysread(my $buffer, 65536) or return 1;
log2i("$client $buffer");
$buffer .= " " . time() if $client->sockport() eq port(8080);
log2o("$client $buffer");
$client->syswrite($buffer);
return $client->sockport() eq port(8080) ? 1 : $buffer =~ /close/;
}
sub log2i { Test::Nginx::log_core('|| <<', @_); }
sub log2o { Test::Nginx::log_core('|| >>', @_); }
sub log2c { Test::Nginx::log_core('||', @_); }
###############################################################################