Remove the Sizzle selectors we do not have.
[remoteglot] / varnishcount.pl
1 #! /usr/bin/perl
2 use AnyEvent;
3 use AnyEvent::Handle;
4 use EV;
5 use LWP::Simple;
6 require 'config.pm';
7 use strict;
8 use warnings;
9 no warnings qw(once);
10
11 open my $fh, "-|", "varnishncsa -F '%{%s}t %U %q tffb=%{Varnish:time_firstbyte}x' -q 'ReqURL ~ \"^/analysis.pl\"'"
12         or die "varnishncsa: $!";
13 my %uniques = ();
14
15 my $ev = AnyEvent::Handle->new(
16         fh => $fh,
17         on_read => sub {
18                 my ($hdl) = @_;
19                 $hdl->push_read(
20                         line => sub {
21                                 my ($hdl, $line, $eof) = @_;
22                                 handle_line($line);
23                         }
24                 );
25         },
26 );
27 my $ev2 = AnyEvent->timer(
28         interval => 1.0,
29         cb => \&output
30 );
31 EV::run;
32
33 sub handle_line {
34         my $line = shift;
35         $line =~ m#(\d+) /analysis.pl \?ims=\d+&unique=(.*) tffb=(.*)# or return;
36         $uniques{$2} = {
37                 last_seen => $1 + $3,
38                 grace => undef,
39         };
40         my $now = time;
41         print "[$now] $1 $2 $3\n";
42 }
43
44 sub output {
45         my $mtime = (stat($remoteglotconf::json_output))[9] - 1;  # Compensate for subsecond issues.
46         my $now = time;
47
48         while (my ($unique, $hash) = each %uniques) {
49                 my $last_seen = $hash->{'last_seen'};
50                 if ($now - $last_seen <= 5) {
51                         # We've seen this user in the last five seconds;
52                         # it's okay.
53                         next;
54                 }
55                 if ($last_seen >= $mtime) {
56                         # This user has the latest version;
57                         # they are probably just hanging.
58                         next;
59                 }
60                 if (!defined($hash->{'grace'})) {
61                         # They have five seconds after a new JSON has been
62                         # provided to get get it, or they're out.
63                         # We don't simply use $mtime, since we don't want to
64                         # reset the grace timer just because a new JSON is
65                         # published.
66                         $hash->{'grace'} = $mtime;
67                 }
68                 if ($now - $hash->{'grace'} > 5) {
69                         printf "Timing out %s (last_seen=%d, now=%d, mtime=%d, grace=%d)\n",
70                                 $unique, $last_seen, $now, $mtime, $hash->{'grace'};
71                         delete $uniques{$unique};
72                 }
73         }
74
75         my $num_viewers = scalar keys %uniques; 
76         printf "%d entries in hash, mtime=$mtime\n", scalar keys %uniques;
77         LWP::Simple::get('http://127.0.0.1:5000/override-num-viewers?num=' . $num_viewers);     
78 }