X-Git-Url: https://git.sesse.net/?p=remoteglot;a=blobdiff_plain;f=varnishcount.pl;fp=varnishcount.pl;h=82356d68176585139faae5fac4709d8c6e92caef;hp=0000000000000000000000000000000000000000;hb=d5d7dc50fe8f44711a2e4d52563ff40db029e819;hpb=7b820e6d4213ba6a8e7d618edc473668acd141aa

diff --git a/varnishcount.pl b/varnishcount.pl
new file mode 100755
index 0000000..82356d6
--- /dev/null
+++ b/varnishcount.pl
@@ -0,0 +1,61 @@
+#! /usr/bin/perl
+use Time::HiRes;
+use LWP::Simple;
+require 'config.pm';
+use strict;
+use warnings;
+no warnings qw(once);
+
+$SIG{ALRM} = sub { output(); };
+Time::HiRes::alarm(1.0, 1.0);
+
+open my $fh, "-|", "varnishncsa -F '%{%s}t %U %q tffb=%{Varnish:time_firstbyte}x' -q 'ReqURL ~ \"^/analysis.pl\"'"
+	or die "varnishncsa: $!";
+my %uniques = ();
+
+while (<$fh>) {
+	chomp;
+	m#(\d+) /analysis.pl \?ims=\d+&unique=(.*) tffb=(.*)# or next;
+	$uniques{$2} = {
+		last_seen => $1 + $3,
+		grace => undef,
+	};
+	my $now = time;
+	print "[$now] $1 $2 $3\n";
+}
+
+sub output {
+	my $mtime = (stat($remoteglotconf::json_output))[9] - 1;  # Compensate for subsecond issues.
+	my $now = time;
+
+	while (my ($unique, $hash) = each %uniques) {
+		my $last_seen = $hash->{'last_seen'};
+		if ($now - $last_seen <= 5) {
+			# We've seen this user in the last five seconds;
+			# it's okay.
+			next;
+		}
+		if ($last_seen >= $mtime) {
+			# This user has the latest version;
+			# they are probably just hanging.
+			next;
+		}
+		if (!defined($hash->{'grace'})) {
+			# They have five seconds after a new JSON has been
+			# provided to get get it, or they're out.
+			# We don't simply use $mtime, since we don't want to
+			# reset the grace timer just because a new JSON is
+			# published.
+			$hash->{'grace'} = $mtime;
+		}
+		if ($now - $hash->{'grace'} > 5) {
+			printf "Timing out %s (last_seen=%d, now=%d, mtime=%d, grace=%d)\n",
+				$unique, $last_seen, $now, $mtime, $hash->{'grace'};
+			delete $uniques{$unique};
+		}
+	}
+
+	my $num_viewers = scalar keys %uniques;	
+	printf "%d entries in hash, mtime=$mtime\n", scalar keys %uniques;
+	LWP::Simple::get('http://127.0.0.1:5000/override-num-viewers?num=' . $num_viewers);	
+}