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h2_priority.t
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h2_priority.t
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#!/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
# suppress deprecation warning
open OLDERR, ">&", \*STDERR; close STDERR;
$t->run();
open STDERR, ">&", \*OLDERR;
# 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');
###############################################################################