limit_conn.t

#!/usr/bin/perl

# (C) Sergey Kandaurov

# limit_req based tests for nginx limit_conn module.

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use warnings;
use strict;

use Test::More;

use Socket qw/ CRLF /;

BEGIN { use FindBin; chdir($FindBin::Bin); }

use lib 'lib';
use Test::Nginx;

###############################################################################

select STDERR; $| = 1;
select STDOUT; $| = 1;

plan(skip_all => 'win32') if $^O eq 'MSWin32';

my $t = Test::Nginx->new()->has(qw/http proxy limit_conn limit_req/)->plan(10);

$t->write_file_expand('nginx.conf', <<'EOF');

%%TEST_GLOBALS%%

daemon off;

events {
}

http {
    %%TEST_GLOBALS_HTTP%%

    limit_req_zone   $binary_remote_addr  zone=req:1m rate=30r/m;

    limit_conn_zone  $binary_remote_addr  zone=zone:1m;
    limit_conn_zone  $binary_remote_addr  zone=zone2:1m;
    limit_conn_zone  $binary_remote_addr  zone=custom:1m;
    limit_zone       legacy  $binary_remote_addr  1m;

    server {
        listen       127.0.0.1:8081;
        server_name  localhost;

        location /w {
            limit_req  zone=req burst=10;
        }
    }

    server {
        listen       127.0.0.1:8080;
        server_name  localhost;

        location / {
            proxy_pass http://127.0.0.1:8081;
            limit_conn zone 1;
        }

        location /1 {
            limit_conn zone 1;
        }

        location /zone {
            limit_conn zone2 1;
        }

        location /unlim {
            limit_conn zone 5;
        }

        location /custom {
            proxy_pass http://127.0.0.1:8081/;
            limit_conn_log_level info;
            limit_conn_status 501;
            limit_conn custom 1;
        }

        location /legacy {
            proxy_pass http://127.0.0.1:8081/;
            limit_conn legacy 1;
        }
    }
}

EOF

open OLDERR, ">&", \*STDERR; close STDERR;
$t->run();
open STDERR, ">&", \*OLDERR;

###############################################################################

# charge limit_req

http_get('/w');

# same and other zones in different locations

my $s = http_start('/w');
like(http_get('/'), qr/^HTTP\/1.. 503 /, 'rejected');
like(http_get('/1'), qr/^HTTP\/1.. 503 /, 'rejected different location');
unlike(http_get('/zone'), qr/^HTTP\/1.. 503 /, 'passed different zone');

close $s;
unlike(http_get('/1'), qr/^HTTP\/1.. 503 /, 'passed');

# custom error code and log level

$s = http_start('/custom/w');
like(http_get('/custom'), qr/^HTTP\/1.. 501 /, 'limit_conn_status');

like(`grep -F '[info]' ${\($t->testdir())}/error.log`,
	qr/limiting connections by zone "custom"/s,
	'limit_conn_log_level');

# limit_zone

$s = http_start('/legacy/w');
like(http_get('/legacy'), qr/^HTTP\/1.. 503 /, 'legacy rejected');

$s->close;
unlike(http_get('/legacy'), qr/^HTTP\/.. 503 /, 'legacy passed');

# limited after unlimited

$s = http_start('/w');
like(http_get('/unlim'), qr/404 Not Found/, 'unlimited passed');
like(http_get('/'), qr/503 Service/, 'limited rejected');

###############################################################################

sub http_start {
	my ($uri) = @_;

	my $s;
	my $request = "GET $uri HTTP/1.0" . CRLF . CRLF;

	eval {
		local $SIG{ALRM} = sub { die "timeout\n" };
		local $SIG{PIPE} = sub { die "sigpipe\n" };
		alarm(3);
		$s = IO::Socket::INET->new(
			Proto => 'tcp',
			PeerAddr => '127.0.0.1:8080'
		);
		log_out($request);
		$s->print($request);
		alarm(0);
	};
	alarm(0);
	if ($@) {
		log_in("died: $@");
		return undef;
	}
	return $s;
}

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