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#!/usr/bin/perl
#
# Use try to connect to a http server.
# For use with "mon".
#
# Special version to measure and log http file transfer speed
#
# Use: "-p port -l log_file -T alarm_seconds -t timeout_seconds host [host:/path_to_doc ...]"
# Configuration file example:
#hostgroup internet_web www.ama-assn.org www.gartner.com test.ahp.com:/~meekj/ca_zip.txt
#watch internet_web
# service internet_web
# interval 1h
# monitor http_t.monitor -l /usr/local/mon/logs/internet_web -T 15.0 -t 100
# period wd {Sun-Sat}
# alert mail.alert firewall_admin
# alertevery 1h
#TODO: Allow port number to be specified in URL
#
# Jon Meek
# American Cyanamid Company
# Princeton, NJ
# meekj@pt.cyanamid.com
#
# $Id: http_t.monitor 1.3 Sat, 30 Jun 2001 14:44:29 -0400 trockij $
#
# Copyright (C) 1998, Jon Meek
#
# 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; either version 2 of the License, or
# (at your option) any later version.
#
# 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
#
use Getopt::Std;
use English;
use Time::HiRes qw( gettimeofday tv_interval );
getopts ("p:t:T:l:");
$PORT = $opt_p || 80;
$TIMEOUT = $opt_t || 30;
@failures = ();
$TimeOfDay = time;
foreach $host_path (@ARGV) { # Build host and path lists
($host, $path) = split(/:/, $host_path, 2);
push(@Hosts, $host);
if (length($path) < 1) {
$Path{$host} = '/';
} else {
$Path{$host} = $path;
}
}
# Open logfile, if -l
if ($opt_l) {
open(LOG, ">>$opt_l") || warn "$0 Can't open logfile: $opt_l\n";
}
foreach $host (@Hosts) {
($OK, $ByteCount, $GetTime) = &httpGET($host, $PORT, $Path{$host});
if (!defined (OK) || $OK == 0) {
push (@failures, $host);
}
$ResultString{$host} = sprintf "%d %s %s %d %8.3f",
$TimeOfDay, $host, $Path{$host}, $ByteCount, $GetTime;
if ($opt_l) {
print LOG "$ResultString{$host}\n";
}
}
close LOG;
if (@failures == 0) {
exit 0;
}
print join (" ", sort @failures), "\n";
foreach $host (sort keys %ResultString) {
print "$ResultString{$host}\n";
}
exit 1;
sub httpGET {
use Socket;
use Sys::Hostname;
my($Server, $Port, $Path) = @_;
my($ServerOK, $TheContent, $ByteCount, $dt);
$TheContent = '';
$dt = 0;
$t0 = [gettimeofday];
###############################################################
eval {
local $SIG{ALRM} = sub { die "Timeout Alarm" };
alarm $TIMEOUT;
$result = &OpenSocket($Server, $Port); # Open a connection to the server
if ($result == 0) { # Failure to open the socket
return '', 0, 0;
}
print S "GET $Path HTTP/1.0\r\n";
print S "Host: $Server\r\n";
print S "User-Agent: mon.d/http.monitor\r\n\r\n";
while ($in = <S>) {
$ByteCount += length($in);
$TheContent .= $in; # Store data for later processing
}
alarm 0; # Cancel the alarm
# HTTP/1.1 200 OK
if ($TheContent =~ /^HTTP\/([\d\.]+)\s+(200|302)\b/) {
$ServerOK = 1;
} else {
$ServerOK = 0;
}
close(S);
};
if ($ServerOK) { # Success, otherwise set time to -1 to indicate time-out
$t1 = [gettimeofday];
$dt = tv_interval($t0, $t1);
} else {
$dt = -1;
}
if (($opt_T) && ($dt >= 0)) { # Check time limit for alarm
if ($dt > $opt_T) {
$ServerOK = 0;
} else {
$ServerOK = 1;
}
}
if ($EVAL_ERROR and ($EVAL_ERROR =~ /^Timeout Alarm/)) {
print "**** Time Out\n";
return 0;
}
return $ServerOK, $ByteCount, $dt;
}
sub OpenSocket {
#
# Make a Berkeley socket connection between this program and a TCP port
# on another (or this) host. Port can be a number or a named service
#
local($OtherHostname, $Port) = @_;
local($OurHostname, $sockaddr, $name, $aliases, $proto, $type, $len,
$ThisAddr, $that);
$OurHostname = &hostname;
($name, $aliases, $proto) = getprotobyname('tcp');
($name, $aliases, $Port) = getservbyname($Port, 'tcp') unless $Port =~ /^\d+$/;
($name, $aliases, $type, $len, $ThisAddr) = gethostbyname($OurHostname);
($name, $aliases, $type, $len, $OtherHostAddr) = gethostbyname($OtherHostname);
my $that = sockaddr_in ($Port, $OtherHostAddr);
$result = socket(S, &PF_INET, &SOCK_STREAM, $proto) || return undef;
$result = connect(S, $that) || return undef;
select(S); $| = 1; select(STDOUT); # set S to be un-buffered
return 1; # success
}
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