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#!/usr/bin/perl -w
# vnstat.cgi -- example cgi for vnStat image output
# copyright (c) 2008-2009 Teemu Toivola <tst at iki dot fi>
#
# based on mailgraph.cgi
# copyright (c) 2000-2007 ETH Zurich
# copyright (c) 2000-2007 David Schweikert <dws@ee.ethz.ch>
# released under the GNU General Public License
my $host = 'Some Server';
my $scriptname = 'vnstat.cgi';
# temporary directory where to store the images
my $tmp_dir = '/tmp/vnstatcgi';
# location of vnstati
my $vnstati_cmd = '/usr/bin/vnstati';
# cache time in minutes, set 0 to disable
my $cachetime = '15';
# shown interfaces, remove unnecessary lines
my @graphs = (
{ interface => 'eth0' },
{ interface => 'eth1' },
);
################
my $VERSION = "1.2";
sub graph($$$)
{
my ($interface, $file, $param) = @_;
my $result = `"$vnstati_cmd" -i "$interface" -c $cachetime $param -o "$file"`;
}
sub print_html()
{
print "Content-Type: text/html\n\n";
print <<HEADER;
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="vnstat.cgi $VERSION">
<title>Traffic Statistics for $host</title>
<style type="text/css">
<!--
a { text-decoration: underline; }
a:link { color: #b0b0b0; }
a:visited { color: #b0b0b0; }
a:hover { color: #000000; }
small { font-size: 8px; color: #cbcbcb; }
-->
</style>
</head>
<body bgcolor="#ffffff">
HEADER
for my $n (0..$#graphs) {
print "<p><a href=\"$scriptname?${n}-f\"><img src=\"$scriptname?${n}-hs\" border=\"0\" alt=\"$graphs[$n]{interface} summary\"></a></p>\n";
}
print <<FOOTER;
<small>Images generated using <a href="http://humdi.net/vnstat/">vnStat</a> image output.</small>
</body>
</html>
FOOTER
}
sub print_fullhtml($)
{
my ($interface) = @_;
print "Content-Type: text/html\n\n";
print <<HEADER;
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<meta name="Generator" content="vnstat.cgi $VERSION">
<title>Traffic Statistics for $host</title>
<style type="text/css">
<!--
a { text-decoration: underline; }
a:link { color: #b0b0b0; }
a:visited { color: #b0b0b0; }
a:hover { color: #000000; }
small { font-size: 8px; color: #cbcbcb; }
-->
</style>
</head>
<body bgcolor="#ffffff">
HEADER
print "<table border=\"0\"><tr><td>\n";
print "<img src=\"$scriptname?${interface}-s\" border=\"0\" alt=\"${interface} summary\">";
print "</td><td>\n";
print "<img src=\"$scriptname?${interface}-h\" border=\"0\" alt=\"${interface} hourly\">";
print "</td></tr><tr><td valign=\"top\">\n";
print "<img src=\"$scriptname?${interface}-d\" border=\"0\" alt=\"${interface} daily\">";
print "</td><td valign=\"top\">\n";
print "<img src=\"$scriptname?${interface}-t\" border=\"0\" alt=\"${interface} top 10\"><br>\n";
print "<img src=\"$scriptname?${interface}-m\" border=\"0\" alt=\"${interface} monthly\" vspace=\"4\">";
print "</td></tr>\n</table>\n";
print <<FOOTER;
<small><br> Images generated using <a href="http://humdi.net/vnstat/">vnStat</a> image output.</small>
</body>
</html>
FOOTER
}
sub send_image($)
{
my ($file)= @_;
-r $file or do {
print "Content-type: text/plain\n\nERROR: can't find $file\n";
exit 1;
};
print "Content-type: image/png\n";
print "Content-length: ".((stat($file))[7])."\n";
print "\n";
open(IMG, $file) or die;
my $data;
print $data while read(IMG, $data, 16384)>0;
}
sub main()
{
mkdir $tmp_dir, 0777 unless -d $tmp_dir;
my $img = $ENV{QUERY_STRING};
if(defined $img and $img =~ /\S/) {
if($img =~ /^(\d+)-s$/) {
my $file = "$tmp_dir/vnstat_$1.png";
graph($graphs[$1]{interface}, $file, "-s");
send_image($file);
}
elsif($img =~ /^(\d+)-hs$/) {
my $file = "$tmp_dir/vnstat_$1_hs.png";
graph($graphs[$1]{interface}, $file, "-hs");
send_image($file);
}
elsif($img =~ /^(\d+)-d$/) {
my $file = "$tmp_dir/vnstat_$1_d.png";
graph($graphs[$1]{interface}, $file, "-d");
send_image($file);
}
elsif($img =~ /^(\d+)-m$/) {
my $file = "$tmp_dir/vnstat_$1_m.png";
graph($graphs[$1]{interface}, $file, "-m");
send_image($file);
}
elsif($img =~ /^(\d+)-t$/) {
my $file = "$tmp_dir/vnstat_$1_t.png";
graph($graphs[$1]{interface}, $file, "-t");
send_image($file);
}
elsif($img =~ /^(\d+)-h$/) {
my $file = "$tmp_dir/vnstat_$1_h.png";
graph($graphs[$1]{interface}, $file, "-h");
send_image($file);
}
elsif($img =~ /^(\d+)-f$/) {
print_fullhtml($1);
}
else {
die "ERROR: invalid argument\n";
}
}
else {
if ($#graphs == 0) {
print_fullhtml(0);
} else {
print_html();
}
}
}
main();
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