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Tests: avoid premature stream reset in h3_limit_req.t. STREAM and RESET_STREAM frames could be batched, which prevents the stream from being processed and changes the status code. The fix is to wait for the stream acknowledgment. Here we just look at the largest acknowledged, this should be enough for simple cases.
author Sergey Kandaurov <pluknet@nginx.com>
date Tue, 04 Apr 2023 00:33:54 +0400
parents 5ac6efbe5552
children 236d038dc04a
line wrap: on
line source

#!/usr/bin/perl

# (C) Sergey Kandaurov
# (C) Nginx, Inc.

# Tests for HTTP/2 protocol with priority.

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

use warnings;
use strict;

use Test::More;

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

use lib 'lib';
use Test::Nginx;
use Test::Nginx::HTTP2;

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

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

my $t = Test::Nginx->new()->has(qw/http http_v2/)->plan(20)
	->write_file_expand('nginx.conf', <<'EOF');

%%TEST_GLOBALS%%

daemon off;

events {
}

http {
    %%TEST_GLOBALS_HTTP%%

    server {
        listen       127.0.0.1:8080 http2;
        server_name  localhost;
    }
}

EOF

$t->run();

# file size is slightly beyond initial window size: 2**16 + 80 bytes

$t->write_file('t1.html',
	join('', map { sprintf "X%04dXXX", $_ } (1 .. 8202)));

$t->write_file('t2.html', 'SEE-THIS');

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

# stream muliplexing + PRIORITY frames

my $s = Test::Nginx::HTTP2->new();
my $sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

my $sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_priority(0, $sid);
$s->h2_priority(255, $sid2);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

my $frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 }
]);

my @data = grep { $_->{type} eq "DATA" } @$frames;
is(join(' ', map { $_->{sid} } @data), "$sid2 $sid", 'weight - PRIORITY 1');

# and vice versa

$s = Test::Nginx::HTTP2->new();
$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_priority(255, $sid);
$s->h2_priority(0, $sid2);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 }
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
is(join(' ', map { $_->{sid} } @data), "$sid $sid2", 'weight - PRIORITY 2');

# stream muliplexing + HEADERS PRIORITY flag

$s = Test::Nginx::HTTP2->new();
$sid = $s->new_stream({ path => '/t1.html', prio => 0 });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html', prio => 255 });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 }
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
my $sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid2 $sid", 'weight - HEADERS PRIORITY 1');

# and vice versa

$s = Test::Nginx::HTTP2->new();
$sid = $s->new_stream({ path => '/t1.html', prio => 255 });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html', prio => 0 });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 }
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid $sid2", 'weight - HEADERS PRIORITY 2');

# 5.3.1.  Stream Dependencies

# PRIORITY frame

$s = Test::Nginx::HTTP2->new();

$s->h2_priority(16, 3, 0);
$s->h2_priority(16, 1, 3);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 },
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid2 $sid", 'dependency - PRIORITY 1');

# and vice versa

$s = Test::Nginx::HTTP2->new();

$s->h2_priority(16, 1, 0);
$s->h2_priority(16, 3, 1);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 },
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid $sid2", 'dependency - PRIORITY 2');

# PRIORITY - self dependency

# 5.3.1.  Stream Dependencies
#   A stream cannot depend on itself.  An endpoint MUST treat this as a
#   stream error of type PROTOCOL_ERROR.
# Instead, we respond with a connection error of type PROTOCOL_ERROR.

$s = Test::Nginx::HTTP2->new();
$sid = $s->new_stream();
$s->read(all => [{ sid => $sid, fin => 1 }]);

$s->h2_priority(0, $sid, $sid);
$frames = $s->read(all => [{ type => 'GOAWAY' }]);

my ($frame) = grep { $_->{type} eq "GOAWAY" } @$frames;
is($frame->{last_sid}, $sid, 'dependency - PRIORITY self - GOAWAY');
is($frame->{code}, 1, 'dependency - PRIORITY self - PROTOCOL_ERROR');

# HEADERS PRIORITY flag, reprioritize prior PRIORITY frame records

$s = Test::Nginx::HTTP2->new();

$s->h2_priority(16, 1, 0);
$s->h2_priority(16, 3, 0);

$sid = $s->new_stream({ path => '/t1.html', dep => 3 });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 },
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid2 $sid", 'dependency - HEADERS PRIORITY 1');

# and vice versa

$s = Test::Nginx::HTTP2->new();

$s->h2_priority(16, 1, 0);
$s->h2_priority(16, 3, 0);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html', dep => 1 });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$s->h2_window(2**17, $sid);
$s->h2_window(2**17, $sid2);
$s->h2_window(2**17);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 },
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid $sid2", 'dependency - HEADERS PRIORITY 2');

# HEADERS - self dependency

$s = Test::Nginx::HTTP2->new();
$sid = $s->new_stream({ dep => 1 });
$frames = $s->read(all => [{ type => 'GOAWAY' }]);

($frame) = grep { $_->{type} eq "GOAWAY" } @$frames;
is($frame->{last_sid}, 0, 'dependency - HEADERS self - GOAWAY');
is($frame->{code}, 1, 'dependency - HEADERS self - PROTOCOL_ERROR');

# PRIORITY frame, weighted dependencies

$s = Test::Nginx::HTTP2->new();

$s->h2_priority(16, 5, 0);
$s->h2_priority(255, 1, 5);
$s->h2_priority(0, 3, 5);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

my $sid3 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid3, fin => 0x4 }]);

$s->h2_window(2**16, 1);
$s->h2_window(2**16, 3);
$s->h2_window(2**16, 5);
$s->h2_window(2**16);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 },
	{ sid => $sid3, fin => 1 },
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid3 $sid $sid2", 'weighted dependency - PRIORITY 1');

# and vice versa

$s = Test::Nginx::HTTP2->new();

$s->h2_priority(16, 5, 0);
$s->h2_priority(0, 1, 5);
$s->h2_priority(255, 3, 5);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid2, fin => 0x4 }]);

$sid3 = $s->new_stream({ path => '/t2.html' });
$s->read(all => [{ sid => $sid3, fin => 0x4 }]);

$s->h2_window(2**16, 1);
$s->h2_window(2**16, 3);
$s->h2_window(2**16, 5);
$s->h2_window(2**16);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid2, fin => 1 },
	{ sid => $sid3, fin => 1 },
]);

@data = grep { $_->{type} eq "DATA" } @$frames;
$sids = join ' ', map { $_->{sid} } @data;
is($sids, "$sid3 $sid2 $sid", 'weighted dependency - PRIORITY 2');

# PRIORITY - reprioritization with circular dependency - after [3] removed
# initial dependency tree:
# 1 <- [3] <- 5

$s = Test::Nginx::HTTP2->new();

$s->h2_window(2**18);

$s->h2_priority(16, 1, 0);
$s->h2_priority(16, 3, 1);
$s->h2_priority(16, 5, 3);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid2, length => 2**16 - 1 }]);

$sid3 = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid3, length => 2**16 - 1 }]);

$s->h2_window(2**16, $sid2);

$frames = $s->read(all => [{ sid => $sid2, fin => 1 }]);
$sids = join ' ', map { $_->{sid} } grep { $_->{type} eq "DATA" } @$frames;
is($sids, $sid2, 'removed dependency');

for (1 .. 40) {
	$s->read(all => [{ sid => $s->new_stream(), fin => 1 }]);
}

# make circular dependency
# 1 <- 5 -- current dependency tree before reprioritization
# 5 <- 1
# 1 <- 5

$s->h2_priority(16, 1, 5);
$s->h2_priority(16, 5, 1);

$s->h2_window(2**16, $sid);
$s->h2_window(2**16, $sid3);

$frames = $s->read(all => [
	{ sid => $sid, fin => 1 },
	{ sid => $sid3, fin => 1 },
]);

($frame) = grep { $_->{type} eq "DATA" && $_->{sid} == $sid } @$frames;
is($frame->{length}, 81, 'removed dependency - first stream');

($frame) = grep { $_->{type} eq "DATA" && $_->{sid} == $sid3 } @$frames;
is($frame->{length}, 81, 'removed dependency - last stream');

# PRIORITY - reprioritization with circular dependency - exclusive [5]
# 1 <- [5] <- 3

$s = Test::Nginx::HTTP2->new();

$s->h2_window(2**18);

$s->h2_priority(16, 1, 0);
$s->h2_priority(16, 3, 1);
$s->h2_priority(16, 5, 1, excl => 1);

$sid = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid, length => 2**16 - 1 }]);

$sid2 = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid2, length => 2**16 - 1 }]);

$sid3 = $s->new_stream({ path => '/t1.html' });
$s->read(all => [{ sid => $sid3, length => 2**16 - 1 }]);

$s->h2_window(2**16, $sid);

$frames = $s->read(all => [{ sid => $sid, fin => 1 }]);
$sids = join ' ', map { $_->{sid} } grep { $_->{type} eq "DATA" } @$frames;
is($sids, $sid, 'exclusive dependency - parent removed');

# make circular dependency
# 5 <- 3 -- current dependency tree before reprioritization
# 3 <- 5

$s->h2_priority(16, 5, 3);

$s->h2_window(2**16, $sid2);
$s->h2_window(2**16, $sid3);

$frames = $s->read(all => [
	{ sid => $sid2, fin => 1 },
	{ sid => $sid3, fin => 1 },
]);

($frame) = grep { $_->{type} eq "DATA" && $_->{sid} == $sid2 } @$frames;
is($frame->{length}, 81, 'exclusive dependency - first stream');

($frame) = grep { $_->{type} eq "DATA" && $_->{sid} == $sid3 } @$frames;
is($frame->{length}, 81, 'exclusive dependency - last stream');

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