t/check-www-inbox.perl

   1 #!/usr/bin/perl -w
   2 # Copyright (C) 2016-2021 all contributors <meta@public-inbox.org>
   3 # License: AGPL-3.0+ <https://www.gnu.org/licenses/agpl-3.0.txt>
   4 # Parallel WWW checker
   5 my $usage = "$0 [-j JOBS] [-s SLOW_THRESHOLD] URL_OF_INBOX\n";
   6 use strict;
   7 use warnings;
   8 use File::Temp qw(tempfile);
   9 use GDBM_File;
  10 use Getopt::Long qw(:config gnu_getopt no_ignore_case auto_abbrev);
  11 use IO::Socket;
  12 use LWP::ConnCache;
  13 use POSIX qw(:sys_wait_h);
  14 use Time::HiRes qw(gettimeofday tv_interval);
  15 use WWW::Mechanize;
  16 use Data::Dumper;
  17
  18 # we want to use vfork+exec with spawn, WWW::Mechanize can use too much
  19 # memory and fork(2) fails
  20 use PublicInbox::Spawn qw(spawn which);
  21 $ENV{PERL_INLINE_DIRECTORY} or warn "PERL_INLINE_DIRECTORY unset, may OOM\n";
  22
  23 our $tmp_owner = $$;
  24 my $nproc = 4;
  25 my $slow = 0.5;
  26 my %opts = (
  27         '-j|jobs=i' => \$nproc,
  28         '-s|slow-threshold=f' => \$slow,
  29 );
  30 GetOptions(%opts) or die "bad command-line args\n$usage";
  31 my $root_url = shift or die $usage;
  32
  33 chomp(my $xmlstarlet = which('xmlstarlet'));
  34 my $atom_check = eval {
  35         my $cmd = [ qw(xmlstarlet val -e -) ];
  36         sub {
  37                 my ($in, $out, $err) = @_;
  38                 use autodie;
  39                 open my $in_fh, '+>', undef;
  40                 open my $out_fh, '+>', undef;
  41                 open my $err_fh, '+>', undef;
  42                 print $in_fh $$in;
  43                 $in_fh->flush;
  44                 sysseek($in_fh, 0, 0);
  45                 my $rdr = {
  46                         0 => fileno($in_fh),
  47                         1 => fileno($out_fh),
  48                         2 => fileno($err_fh),
  49                 };
  50                 my $pid = spawn($cmd, undef, $rdr);
  51                 while (waitpid($pid, 0) != $pid) {
  52                         next if $!{EINTR};
  53                         warn "waitpid(xmlstarlet, $pid) $!";
  54                         return $!;
  55                 }
  56                 sysseek($out_fh, 0, 0);
  57                 sysread($out_fh, $$out, -s $out_fh);
  58                 sysseek($err_fh, 0, 0);
  59                 sysread($err_fh, $$err, -s $err_fh);
  60                 $?
  61         }
  62 } if $xmlstarlet;
  63
  64 my %workers;
  65 $SIG{INT} = sub { exit 130 };
  66 $SIG{TERM} = sub { exit 0 };
  67 $SIG{CHLD} = sub {
  68         while (1) {
  69                 my $pid = waitpid(-1, WNOHANG);
  70                 return if !defined $pid || $pid <= 0;
  71                 my $p = delete $workers{$pid} || '(unknown)';
  72                 warn("$pid [$p] exited with $?\n") if $?;
  73         }
  74 };
  75
  76 my @todo = IO::Socket->socketpair(AF_UNIX, SOCK_SEQPACKET, 0);
  77 die "socketpair failed: $!" unless $todo[1];
  78 my @done = IO::Socket->socketpair(AF_UNIX, SOCK_SEQPACKET, 0);
  79 die "socketpair failed: $!" unless $done[1];
  80 $| = 1;
  81
  82 foreach my $p (1..$nproc) {
  83         my $pid = fork;
  84         die "fork failed: $!\n" unless defined $pid;
  85         if ($pid) {
  86                 $workers{$pid} = $p;
  87         } else {
  88                 $todo[1]->close;
  89                 $done[0]->close;
  90                 worker_loop($todo[0], $done[1]);
  91         }
  92 }
  93
  94 my ($fh, $tmp) = tempfile('www-check-XXXX',
  95                         SUFFIX => '.gdbm', UNLINK => 1, TMPDIR => 1);
  96 my $gdbm = tie my %seen, 'GDBM_File', $tmp, &GDBM_WRCREAT, 0600;
  97 defined $gdbm or die "gdbm open failed: $!\n";
  98 $todo[0]->close;
  99 $done[1]->close;
 100
 101 my ($rvec, $wvec);
 102 $todo[1]->blocking(0);
 103 $done[0]->blocking(0);
 104 $seen{$root_url} = 1;
 105 my $ndone = 0;
 106 my $nsent = 1;
 107 my @queue = ($root_url);
 108 my $timeout = $slow * 4;
 109 while (keys %workers) { # reacts to SIGCHLD
 110         $wvec = $rvec = '';
 111         my $u;
 112         vec($rvec, fileno($done[0]), 1) = 1;
 113         if (@queue) {
 114                 vec($wvec, fileno($todo[1]), 1) = 1;
 115         } elsif ($ndone == $nsent) {
 116                 kill 'TERM', keys %workers;
 117                 exit;
 118         }
 119         if (!select($rvec, $wvec, undef, $timeout)) {
 120                 while (my ($k, $v) = each %seen) {
 121                         next if $v == 2;
 122                         print "WAIT ($ndone/$nsent) <$k>\n";
 123                 }
 124         }
 125         while ($u = shift @queue) {
 126                 my $s = $todo[1]->send($u, 0);
 127                 if ($!{EAGAIN}) {
 128                         unshift @queue, $u;
 129                         last;
 130                 }
 131         }
 132         my $r;
 133         do {
 134                 $r = $done[0]->recv($u, 65535, 0);
 135         } while (!defined $r && $!{EINTR});
 136         next unless $u;
 137         if ($u =~ s/\ADONE\t//) {
 138                 $ndone++;
 139                 $seen{$u} = 2;
 140         } else {
 141                 next if $seen{$u};
 142                 $seen{$u} = 1;
 143                 $nsent++;
 144                 push @queue, $u;
 145         }
 146 }
 147
 148 sub worker_loop {
 149         my ($todo_rd, $done_wr) = @_;
 150         $SIG{CHLD} = 'DEFAULT';
 151         my $m = WWW::Mechanize->new(autocheck => 0);
 152         my $cc = LWP::ConnCache->new;
 153         $m->stack_depth(0); # no history
 154         $m->conn_cache($cc);
 155         while (1) {
 156                 $todo_rd->recv(my $u, 65535, 0);
 157                 next unless $u;
 158
 159                 my $t = [ gettimeofday ];
 160                 my $r = $m->get($u);
 161                 $t = tv_interval($t);
 162                 printf "SLOW %0.06f % 5d %s\n", $t, $$, $u if $t > $slow;
 163                 my @links;
 164                 if ($r->is_success) {
 165                         my %links = map {
 166                                 (split('#', $_->URI->abs->as_string))[0] => 1;
 167                         } grep {
 168                                 $_->tag && $_->url !~ /:/
 169                         } $m->links;
 170                         @links = keys %links;
 171                 } elsif ($r->code != 300) {
 172                         warn "W: ".$r->code . " $u\n"
 173                 }
 174
 175                 my $s;
 176                 # blocking
 177                 foreach my $l (@links, "DONE\t$u") {
 178                         next if $l eq '' || $l =~ /\.mbox(?:\.gz)\z/;
 179                         do {
 180                                 $s = $done_wr->send($l, 0);
 181                         } while (!defined $s && $!{EINTR});
 182                         die "$$ send $!\n" unless defined $s;
 183                         my $n = length($l);
 184                         die "$$ send truncated $s < $n\n" if $s != $n;
 185                 }
 186
 187                 # make sure the HTML source doesn't screw up terminals
 188                 # when people curl the source (not remotely an expert
 189                 # on languages or encodings, here).
 190                 my $ct = $r->header('Content-Type') || '';
 191                 warn "no Content-Type: $u\n" if $ct eq '';
 192
 193                 if ($atom_check && $ct =~ m!\bapplication/atom\+xml\b!) {
 194                         my $raw = $r->decoded_content;
 195                         my ($out, $err) = ('', '');
 196                         my $fail = $atom_check->(\$raw, \$out, \$err);
 197                         warn "Atom ($fail) - $u - <1:$out> <2:$err>\n" if $fail;
 198                 }
 199
 200                 next if $ct !~ m!\btext/html\b!;
 201                 my $dc = $r->decoded_content;
 202                 if ($dc =~ /([\x00-\x08\x0d-\x1f\x7f-\x{99999999}]+)/s) {
 203                         my $o = $1;
 204                         my $c = Dumper($o);
 205                         warn "bad: $u $c\n";
 206                 }
 207         }
 208 }