#!/usr/bin/perl -w
#
# Copyright (C) 2004 Jimmy Olsen, Audun Ytterdal, Tore Anderson
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2 dated June,
# 1991.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
#
#
# Plugin to monitor squid requests.
#
# Configuration variables:
#
# 	squidhost    - host (default "localhost")
# 	squidport    - port (default "3128")
# 	squiduser    - username (default "")
# 	squidpasswd  - password (default "")
#
# Parameters:
#
# 	config    (required)
# 	autoconf  (optional - only used by munin-config)
#
# $Log$
# Revision 1.8  2004/12/10 18:51:43  jimmyo
# linux/apt* has been forced to LANG=C, to get predictable output.
#
# Revision 1.7  2004/12/10 10:47:47  jimmyo
# Change name from ${scale} to ${graph_period}, to be more consistent.
#
# Revision 1.6  2004/12/09 22:12:55  jimmyo
# Added "graph_period" option, to make "graph_sums" usable.
#
# Revision 1.5  2004/11/16 20:18:09  jimmyo
# License cleanups.
#
# Revision 1.4  2004/09/26 22:03:52  jimmyo
# Changd COUNTER -> DERIVE for some plugins. Set min/max values.
#
# Revision 1.3  2004/05/20 13:57:12  jimmyo
# Set categories to some of the plugins.
#
# Revision 1.2  2004/03/14 11:33:13  auduny
# Added squidpatch from Jacques Caruso
#
# Revision 1.1  2004/01/02 18:50:00  jimmyo
# Renamed occurrances of lrrd -> munin
#
# Revision 1.1.1.1  2004/01/02 15:18:07  jimmyo
# Import of LRRD CVS tree after renaming to Munin
#
# Revision 1.7  2003/12/18 17:26:26  jimmyo
# Remove use of "use"
#
# Revision 1.6  2003/11/15 11:10:28  jimmyo
# Various fixes
#
# Revision 1.5  2003/11/10 18:41:33  jimmyo
# Removed Data::Dumper dependency.
#
# Revision 1.4  2003/11/07 17:43:16  jimmyo
# Cleanups and log entries
#
#
#
#%# family=auto
#%# capabilities=autoconf

# $Id: squid_requests.in 931 2005-08-04 19:04:37Z lupe $

my $ret = undef;

if (! eval "require IO::Socket;")
{
	$ret = "IO::Socket not found";
}
if (! eval "require MIME::Base64;")
{
	$ret = "MIME::Base64 not found";
}

$squid_host = $ENV{squidhost} || "localhost";
$squid_port = $ENV{squidport} || 3128;
$user = $ENV{squiduser} || "";
$passwd = $ENV{squidpasswd} || "";
$target = "client_http\.(requests|hits|errors)";

if($ARGV[0] and $ARGV[0] eq "autoconf") {
    &autoconf($squid_host, $squid_port, $user, $passwd);
}

sub autoconf {
    my ($host, $port, $user, $passwd) = @_;

    if ($ret)
    {
	    print "no ($ret)\n";
	    exit 1;
    }

    my $cachemgr = IO::Socket::INET->new(PeerAddr => $host,
					PeerPort => $port,
					Proto    => 'tcp');

    if (!$cachemgr)
    {
	print "no (could not connect: $!)\n";
	exit 1;
    }

    my $request = "GET cache_object://$host/counters HTTP/1.0\r\n" .
	"Accept: */*\r\n" .
	&make_auth_header($user, $passwd) .
	"\r\n";
		  
    $cachemgr->syswrite($request, length($request));
    my @lines = $cachemgr->getlines();

    print "yes\n";
    exit 0;
}

sub make_auth_header {
    my ($user, $passwd) = @_;

    if(!defined $passwd || $passwd eq "") {
	return "";
    } else {
	my $auth = MIME::Base64::encode_base64(($user ? $user : "") . ":$passwd", "");
	return "Authorization: Basic $auth\r\n" .
	    "Proxy-Authorization: Basic $auth\r\n";
    }
}


sub query_squid {
    my ($host, $port, $user, $passwd) = @_;

    my $cachemgr = IO::Socket::INET->new(PeerAddr => $host,
					PeerPort => $port,
					Proto    => 'tcp') or die($!);

    

    my $request = "GET cache_object://$host/counters HTTP/1.0\r\n" .
	"Accept: */*\r\n" .
	&make_auth_header($user, $passwd) .
	"\r\n";
		  
    $cachemgr->syswrite($request, length($request));
    my @lines = $cachemgr->getlines();
    for(my $i = 0; $i <= $#lines; $i++) {
	if($lines[$i] =~ /$target = (\d+)/) {
	    print "$1.value $2\n";
	}
    }
}

if($ARGV[0] and $ARGV[0] eq "config") {
    print "graph_title Squid client requests\n";
    print "graph_args --base 1000 -l 0\n";
    print "graph_vlabel requests / \${graph_period}\n";
    print "graph_order hits errors requests\n";
    print "graph_total total\n";
    print "graph_scale no\n";
    print "graph_category squid\n";
    print "hits.label hits\n";
    print "hits.type DERIVE\n";
    print "hits.draw AREA\n";
    print "hits.min 0\n";
    print "hits.max 500000\n";
    print "errors.label errors\n";
    print "errors.type DERIVE\n";
    print "errors.draw STACK\n";
    print "errors.min 0\n";
    print "errors.max 500000\n";
    print "requests.label misses\n";
    print "requests.cdef requests,hits,-,errors,-\n";
    print "requests.type DERIVE\n";
    print "requests.draw STACK\n";
    print "requests.min 0\n";
    print "requests.max 500000\n";
    exit 0;
}

&query_squid($squid_host, $squid_port, $user, $passwd, $target);



# vim:syntax=perl