view limit_conn.t @ 1825:3629eda94c1b

Tests: handling of EWOULDBLOCK from sysread() with IO::Socket::SSL. With IO::Socket::SSL, when select() reports that the socket is readable, reading from it might still fail with EWOULDBLOCK, since no application data is available in the socket. In particular, this might happen with TLSv1.3 when a session ticket is received after the handshake. Fix is to explicitly check for EWOULDBLOCK errors.
author Maxim Dounin <mdounin@mdounin.ru>
date Tue, 21 Mar 2023 02:57:39 +0300
parents 196d33c2bb45
children
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#!/usr/bin/perl

# (C) Sergey Kandaurov

# limit_req based tests for nginx limit_conn module.

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

use warnings;
use strict;

use Test::More;

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

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

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

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

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

$t->write_file_expand('nginx.conf', <<'EOF')->plan(8);

%%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;

    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;
        }
    }
}

EOF

$t->run();

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

# charge limit_req

http_get('/w');

# same and other zones in different locations

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

like($t->read_file('error.log'),
	qr/\[info\].*limiting connections by zone "custom"/,
	'limit_conn_log_level');

# limited after unlimited

$s = http_get('/w', start => 1);
like(http_get('/unlim'), qr/404 Not Found/, 'unlimited passed');
like(http_get('/'), qr/503 Service/, 'limited rejected');

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