# Copyright (C) 2016-2018 all contributors
# License: AGPL-3.0+
# note: our HTTP server should be standalone and capable of running
# generic Rack apps.
use strict;
use warnings;
use Test::More;
use Time::HiRes qw(gettimeofday tv_interval);
foreach my $mod (qw(Plack::Util Plack::Builder Danga::Socket
HTTP::Date HTTP::Status)) {
eval "require $mod";
plan skip_all => "$mod missing for httpd-corner.t" if $@;
}
use Digest::SHA qw(sha1_hex);
use File::Temp qw/tempdir/;
use Cwd qw/getcwd/;
use IO::Socket;
use IO::Socket::UNIX;
use Fcntl qw(FD_CLOEXEC F_SETFD F_GETFD :seek);
use Socket qw(SO_KEEPALIVE IPPROTO_TCP TCP_NODELAY);
use POSIX qw(dup2 mkfifo :sys_wait_h);
my $tmpdir = tempdir('httpd-corner-XXXXXX', TMPDIR => 1, CLEANUP => 1);
my $fifo = "$tmpdir/fifo";
ok(defined mkfifo($fifo, 0777), 'created FIFO');
my $err = "$tmpdir/stderr.log";
my $out = "$tmpdir/stdout.log";
my $httpd = 'blib/script/public-inbox-httpd';
my $psgi = getcwd()."/t/httpd-corner.psgi";
my %opts = (
LocalAddr => '127.0.0.1',
ReuseAddr => 1,
Proto => 'tcp',
Type => SOCK_STREAM,
Listen => 1024,
);
my $sock = IO::Socket::INET->new(%opts);
my $upath = "$tmpdir/s";
my $unix = IO::Socket::UNIX->new(
Listen => 1024,
Type => SOCK_STREAM,
Local => $upath
);
ok($unix, 'UNIX socket created');
my $pid;
END { kill 'TERM', $pid if defined $pid };
my $spawn_httpd = sub {
my (@args) = @_;
$! = 0;
my $fl = fcntl($sock, F_GETFD, 0);
ok(! $!, 'no error from fcntl(F_GETFD)');
is($fl, FD_CLOEXEC, 'cloexec set by default (Perl behavior)');
$pid = fork;
if ($pid == 0) {
# pretend to be systemd
dup2(fileno($sock), 3) or die "dup2 failed: $!\n";
dup2(fileno($unix), 4) or die "dup2 failed: $!\n";
my $t = IO::Handle->new_from_fd(3, 'r');
$t->fcntl(F_SETFD, 0);
my $u = IO::Handle->new_from_fd(4, 'r');
$u->fcntl(F_SETFD, 0);
$ENV{LISTEN_PID} = $$;
$ENV{LISTEN_FDS} = 2;
exec $httpd, @args, "--stdout=$out", "--stderr=$err", $psgi;
die "FAIL: $!\n";
}
ok(defined $pid, 'forked httpd process successfully');
};
{
ok($sock, 'sock created');
$! = 0;
my $fl = fcntl($sock, F_GETFD, 0);
ok(! $!, 'no error from fcntl(F_GETFD)');
is($fl, FD_CLOEXEC, 'cloexec set by default (Perl behavior)');
$spawn_httpd->('-W0');
}
{
my $conn = conn_for($sock, 'streaming callback');
$conn->write("GET /callback HTTP/1.0\r\n\r\n");
ok($conn->read(my $buf, 8192), 'read response');
my ($head, $body) = split(/\r\n\r\n/, $buf);
is($body, "hello world\n", 'callback body matches expected');
}
{
my $conn = conn_for($sock, 'getline-die');
$conn->write("GET /getline-die HTTP/1.1\r\nHost: example.com\r\n\r\n");
ok($conn->read(my $buf, 8192), 'read some response');
like($buf, qr!HTTP/1\.1 200\b[^\r]*\r\n!, 'got some sort of header');
is($conn->read(my $nil, 8192), 0, 'read EOF');
$conn = undef;
my $after = capture($err);
is(scalar(grep(/GETLINE FAIL/, @$after)), 1, 'failure logged');
is(scalar(grep(/CLOSE FAIL/, @$after)), 1, 'body->close not called');
}
{
my $conn = conn_for($sock, 'close-die');
$conn->write("GET /close-die HTTP/1.1\r\nHost: example.com\r\n\r\n");
ok($conn->read(my $buf, 8192), 'read some response');
like($buf, qr!HTTP/1\.1 200\b[^\r]*\r\n!, 'got some sort of header');
is($conn->read(my $nil, 8192), 0, 'read EOF');
$conn = undef;
my $after = capture($err);
is(scalar(grep(/GETLINE FAIL/, @$after)), 0, 'getline not failed');
is(scalar(grep(/CLOSE FAIL/, @$after)), 1, 'body->close not called');
}
{
my $conn = conn_for($sock, 'excessive header');
$SIG{PIPE} = 'IGNORE';
$conn->write("GET /callback HTTP/1.0\r\n");
foreach my $i (1..500000) {
last unless $conn->write("X-xxxxxJunk-$i: omg\r\n");
}
ok(!$conn->write("\r\n"), 'broken request');
ok($conn->read(my $buf, 8192), 'read response');
my ($head, $body) = split(/\r\n\r\n/, $buf);
like($head, qr/\b400\b/, 'got 400 response');
}
{
my $conn = conn_for($sock, 'excessive body Content-Length');
$SIG{PIPE} = 'IGNORE';
my $n = (10 * 1024 * 1024) + 1;
$conn->write("PUT /sha1 HTTP/1.0\r\nContent-Length: $n\r\n\r\n");
ok($conn->read(my $buf, 8192), 'read response');
my ($head, $body) = split(/\r\n\r\n/, $buf);
like($head, qr/\b413\b/, 'got 413 response');
}
{
my $conn = conn_for($sock, 'excessive body chunked');
$SIG{PIPE} = 'IGNORE';
my $n = (10 * 1024 * 1024) + 1;
$conn->write("PUT /sha1 HTTP/1.1\r\nTransfer-Encoding: chunked\r\n");
$conn->write("\r\n".sprintf("%x\r\n", $n));
ok($conn->read(my $buf, 8192), 'read response');
my ($head, $body) = split(/\r\n\r\n/, $buf);
like($head, qr/\b413\b/, 'got 413 response');
}
# Unix domain sockets
{
my $u = IO::Socket::UNIX->new(Type => SOCK_STREAM, Peer => $upath);
ok($u, 'unix socket connected');
$u->write("GET /host-port HTTP/1.0\r\n\r\n");
$u->read(my $buf, 4096);
like($buf, qr!\r\n\r\n127\.0\.0\.1:0\z!,
'set REMOTE_ADDR and REMOTE_PORT for Unix socket');
}
sub conn_for {
my ($sock, $msg) = @_;
my $conn = IO::Socket::INET->new(
PeerAddr => $sock->sockhost,
PeerPort => $sock->sockport,
Proto => 'tcp',
Type => SOCK_STREAM);
ok($conn, "connected for $msg");
$conn->autoflush(1);
setsockopt($conn, IPPROTO_TCP, TCP_NODELAY, 1);
return $conn;
}
{
my $conn = conn_for($sock, 'host-port');
$conn->write("GET /host-port HTTP/1.0\r\n\r\n");
$conn->read(my $buf, 4096);
my ($head, $body) = split(/\r\n\r\n/, $buf);
my ($addr, $port) = split(/:/, $body);
is($addr, $conn->sockhost, 'host matches addr');
is($port, $conn->sockport, 'port matches');
}
# graceful termination
{
my $conn = conn_for($sock, 'graceful termination via slow header');
$conn->write("GET /slow-header HTTP/1.0\r\n" .
"X-Check-Fifo: $fifo\r\n\r\n");
open my $f, '>', $fifo or die "open $fifo: $!\n";
$f->autoflush(1);
ok(print($f "hello\n"), 'wrote something to fifo');
my $kpid = $pid;
$pid = undef;
is(kill('TERM', $kpid), 1, 'started graceful shutdown');
ok(print($f "world\n"), 'wrote else to fifo');
close $f or die "close fifo: $!\n";
$conn->read(my $buf, 8192);
my ($head, $body) = split(/\r\n\r\n/, $buf, 2);
like($head, qr!\AHTTP/1\.[01] 200 OK!, 'got 200 for slow-header');
is($body, "hello\nworld\n", 'read expected body');
is(waitpid($kpid, 0), $kpid, 'reaped httpd');
is($?, 0, 'no error');
$spawn_httpd->('-W0');
}
{
my $conn = conn_for($sock, 'graceful termination via slow-body');
$conn->write("GET /slow-body HTTP/1.0\r\n" .
"X-Check-Fifo: $fifo\r\n\r\n");
open my $f, '>', $fifo or die "open $fifo: $!\n";
$f->autoflush(1);
my $buf;
$conn->sysread($buf, 8192);
like($buf, qr!\AHTTP/1\.[01] 200 OK!, 'got 200 for slow-body');
like($buf, qr!\r\n\r\n!, 'finished HTTP response header');
foreach my $c ('a'..'c') {
$c .= "\n";
ok(print($f $c), 'wrote line to fifo');
$conn->sysread($buf, 8192);
is($buf, $c, 'got trickle for reading');
}
my $kpid = $pid;
$pid = undef;
is(kill('TERM', $kpid), 1, 'started graceful shutdown');
ok(print($f "world\n"), 'wrote else to fifo');
close $f or die "close fifo: $!\n";
$conn->sysread($buf, 8192);
is($buf, "world\n", 'read expected body');
is($conn->sysread($buf, 8192), 0, 'got EOF from server');
is(waitpid($kpid, 0), $kpid, 'reaped httpd');
is($?, 0, 'no error');
$spawn_httpd->('-W0');
}
sub delay { select(undef, undef, undef, shift || rand(0.02)) }
my $str = 'abcdefghijklmnopqrstuvwxyz';
my $len = length $str;
is($len, 26, 'got the alphabet');
my $check_self = sub {
my ($conn) = @_;
$conn->read(my $buf, 4096);
my ($head, $body) = split(/\r\n\r\n/, $buf, 2);
like($head, qr/\r\nContent-Length: 40\r\n/s, 'got expected length');
is($body, sha1_hex($str), 'read expected body');
};
SKIP: {
use POSIX qw(dup2);
my $have_curl = 0;
foreach my $p (split(':', $ENV{PATH})) {
-x "$p/curl" or next;
$have_curl = 1;
last;
}
my $ntest = 2;
$have_curl or skip('curl(1) missing', $ntest);
my $url = 'http://' . $sock->sockhost . ':' . $sock->sockport . '/sha1';
my ($r, $w);
pipe($r, $w) or die "pipe: $!";
open(my $tout, '+>', undef) or die "open temporary file: $!";
my $pid = fork;
defined $pid or die "fork: $!";
my @cmd = (qw(curl --tcp-nodelay --no-buffer -T- -HExpect: -sS), $url);
if ($pid == 0) {
dup2(fileno($r), 0) or die "redirect stdin failed: $!\n";
dup2(fileno($tout), 1) or die "redirect stdout failed: $!\n";
exec(@cmd) or die 'exec `' . join(' '). "' failed: $!\n";
}
$w->autoflush(1);
foreach my $c ('a'..'z') {
print $w $c or die "failed to write to curl: $!";
delay();
}
close $w or die "close write pipe: $!";
close $r or die "close read pipe: $!";
my $kid = waitpid $pid, 0;
is($?, 0, 'curl exited successfully');
$tout->sysseek(0, SEEK_SET);
$tout->sysread(my $buf, 100);
is($buf, sha1_hex($str), 'read expected body');
}
{
my $conn = conn_for($sock, '1.1 pipeline together');
$conn->write("PUT /sha1 HTTP/1.1\r\nUser-agent: hello\r\n\r\n" .
"PUT /sha1 HTTP/1.1\r\n\r\n");
my $buf = '';
my @r;
until (scalar(@r) >= 2) {
my $r = $conn->sysread(my $tmp, 4096);
die $! unless defined $r;
die "EOF <$buf>" unless $r;
$buf .= $tmp;
@r = ($buf =~ /\r\n\r\n([a-f0-9]{40})/g);
}
is(2, scalar @r, 'got 2 responses');
my $i = 3;
foreach my $hex (@r) {
is($hex, sha1_hex(''), "read expected body $i");
$i++;
}
}
{
my $conn = conn_for($sock, 'no TCP_CORK on empty body');
$conn->write("GET /empty HTTP/1.1\r\nHost:example.com\r\n\r\n");
my $buf = '';
my $t0 = [ gettimeofday ];
until ($buf =~ /\r\n\r\n/s) {
$conn->sysread($buf, 4096, length($buf));
}
my $elapsed = tv_interval($t0, [ gettimeofday ]);
ok($elapsed < 0.190, 'no 200ms TCP cork delay on empty body');
}
{
my $conn = conn_for($sock, 'graceful termination during slow request');
$conn->write("PUT /sha1 HTTP/1.0\r\n");
delay();
$conn->write("Content-Length: $len\r\n");
delay();
$conn->write("\r\n");
my $kpid = $pid;
$pid = undef;
is(kill('TERM', $kpid), 1, 'started graceful shutdown');
delay();
my $n = 0;
foreach my $c ('a'..'z') {
$n += $conn->write($c);
}
is($n, $len, 'wrote alphabet');
$check_self->($conn);
is(waitpid($kpid, 0), $kpid, 'reaped httpd');
is($?, 0, 'no error');
$spawn_httpd->('-W0');
}
# various DoS attacks against the chunk parser:
{
local $SIG{PIPE} = 'IGNORE';
my $conn = conn_for($sock, '1.1 chunk header excessive');
$conn->write("PUT /sha1 HTTP/1.1\r\nTransfer-Encoding:chunked\r\n\r\n");
my $n = 0;
my $w;
while ($w = $conn->write('ffffffff')) {
$n += $w;
}
ok($!, 'got error set in $!');
is($w, undef, 'write error happened');
ok($n > 0, 'was able to write');
my $r = $conn->read(my $buf, 66666);
ok($r > 0, 'got non-empty response');
like($buf, qr!HTTP/1\.\d 400 !, 'got 400 response');
$conn = conn_for($sock, '1.1 chunk trailer excessive');
$conn->write("PUT /sha1 HTTP/1.1\r\nTransfer-Encoding:chunked\r\n\r\n");
is($conn->syswrite("1\r\na"), 4, 'wrote first header + chunk');
delay();
$n = 0;
while ($w = $conn->write("\r")) {
$n += $w;
}
ok($!, 'got error set in $!');
ok($n > 0, 'wrote part of chunk end (\r)');
$r = $conn->read($buf, 66666);
ok($r > 0, 'got non-empty response');
like($buf, qr!HTTP/1\.\d 400 !, 'got 400 response');
}
{
my $conn = conn_for($sock, '1.1 chunked close trickle');
$conn->write("PUT /sha1 HTTP/1.1\r\nConnection:close\r\n");
$conn->write("Transfer-encoding: chunked\r\n\r\n");
foreach my $x ('a'..'z') {
delay();
$conn->write('1');
delay();
$conn->write("\r");
delay();
$conn->write("\n");
delay();
$conn->write($x);
delay();
$conn->write("\r");
delay();
$conn->write("\n");
}
$conn->write('0');
delay();
$conn->write("\r");
delay();
$conn->write("\n");
delay();
$conn->write("\r");
delay();
$conn->write("\n");
delay();
$check_self->($conn);
}
{
my $conn = conn_for($sock, '1.1 chunked close');
$conn->write("PUT /sha1 HTTP/1.1\r\nConnection:close\r\n");
my $xlen = sprintf('%x', $len);
$conn->write("Transfer-Encoding: chunked\r\n\r\n$xlen\r\n" .
"$str\r\n0\r\n\r\n");
$check_self->($conn);
}
{
my $conn = conn_for($sock, 'chunked body + pipeline');
$conn->write("PUT /sha1 HTTP/1.1\r\n" .
"Transfer-Encoding: chunked\r\n");
delay();
$conn->write("\r\n1\r\n");
delay();
$conn->write('a');
delay();
$conn->write("\r\n0\r\n\r\nPUT /sha1 HTTP/1.1\r\n");
delay();
my $buf = '';
until ($buf =~ /\r\n\r\n[a-f0-9]{40}\z/) {
$conn->sysread(my $tmp, 4096);
$buf .= $tmp;
}
my ($head, $body) = split(/\r\n\r\n/, $buf, 2);
like($head, qr/\r\nContent-Length: 40\r\n/s, 'got expected length');
is($body, sha1_hex('a'), 'read expected body');
$conn->write("Connection: close\r\n");
$conn->write("Content-Length: $len\r\n\r\n$str");
$check_self->($conn);
}
{
my $conn = conn_for($sock, 'trickle header, one-shot body + pipeline');
$conn->write("PUT /sha1 HTTP/1.0\r\n" .
"Connection: keep-alive\r\n");
delay();
$conn->write("Content-Length: $len\r\n\r\n${str}PUT");
my $buf = '';
until ($buf =~ /\r\n\r\n[a-f0-9]{40}\z/) {
$conn->sysread(my $tmp, 4096);
$buf .= $tmp;
}
my ($head, $body) = split(/\r\n\r\n/, $buf, 2);
like($head, qr/\r\nContent-Length: 40\r\n/s, 'got expected length');
is($body, sha1_hex($str), 'read expected body');
$conn->write(" /sha1 HTTP/1.0\r\nContent-Length: $len\r\n\r\n$str");
$check_self->($conn);
}
{
my $conn = conn_for($sock, 'trickle body');
$conn->write("PUT /sha1 HTTP/1.0\r\n");
$conn->write("Content-Length: $len\r\n\r\n");
my $beg = substr($str, 0, 10);
my $end = substr($str, 10);
is($beg . $end, $str, 'substr setup correct');
delay();
$conn->write($beg);
delay();
$conn->write($end);
$check_self->($conn);
}
{
my $conn = conn_for($sock, 'one-shot write');
$conn->write("PUT /sha1 HTTP/1.0\r\n" .
"Content-Length: $len\r\n\r\n$str");
$check_self->($conn);
}
{
my $conn = conn_for($sock, 'trickle header, one-shot body');
$conn->write("PUT /sha1 HTTP/1.0\r\n");
delay();
$conn->write("Content-Length: $len\r\n\r\n$str");
$check_self->($conn);
}
{
my $conn = conn_for($sock, '1.1 Connnection: close');
$conn->write("PUT /sha1 HTTP/1.1\r\nConnection:close\r\n");
delay();
$conn->write("Content-Length: $len\r\n\r\n$str");
$check_self->($conn);
}
{
my $conn = conn_for($sock, '1.1 pipeline start');
$conn->write("PUT /sha1 HTTP/1.1\r\n\r\nPUT");
my $buf = '';
until ($buf =~ /\r\n\r\n[a-f0-9]{40}\z/) {
$conn->sysread(my $tmp, 4096);
$buf .= $tmp;
}
my ($head, $body) = split(/\r\n\r\n/, $buf, 2);
like($head, qr/\r\nContent-Length: 40\r\n/s, 'got expected length');
is($body, sha1_hex(''), 'read expected body');
# 2nd request
$conn->write(" /sha1 HTTP/1.1\r\n\r\n");
$buf = '';
until ($buf =~ /\r\n\r\n[a-f0-9]{40}\z/) {
$conn->sysread(my $tmp, 4096);
$buf .= $tmp;
}
($head, $body) = split(/\r\n\r\n/, $buf, 2);
like($head, qr/\r\nContent-Length: 40\r\n/s, 'got expected length');
is($body, sha1_hex(''), 'read expected body #2');
}
done_testing();
sub capture {
my ($f) = @_;
open my $fh, '+<', $f or die "failed to open $f: $!\n";
local $/ = "\n";
my @r = <$fh>;
truncate($fh, 0) or die "truncate failed on $f: $!\n";
\@r
}
1;