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#!/usr/bin/perl
#
# NAME
# http_integrity.monitor
#
#
# SYNOPSIS
# http_integrity.monitor [-u url] [-n num_threads] [-a anchor_tag_types]
# [-t link_timeout] [-T page_timeout] host...
#
#
# DESCRIPTION
# Use try to connect to a http server and verify the integrity of the
# page and objects within that page (e.g. to make sure that there are
# no broken images).
#
# For use with "mon".
#
#
# EXAMPLES
# ./http_integrity.monitor -u "/index.html" host1 host2 host3
#
#
# OPTIONS
# -u URL path to retrieve from each host.
#
# -s Use SSL to connect to the host.
#
# -n Max number of requests to issue at one time. Defaults to 8.
# Increasing this number may produce faster load times, depending
# on the performance of the site and the speed of the link.
# Decreasing this number may produce slower load times, again,
# depending on the performance of the site and the speed of the link.
# Experiment to find what works best for you.
#
# -t Timeout, in seconds, to wait for data when downloading any given
# link. Must be an integer.
#
# -T Timeout, in seconds, to issue an error for if the time to load
# the page, plus any associated images/applets/etc., exceeds this
# number. Can be a floating point number.
#
# -a Types of anchor tag items to retrieve, in a space separated quoted
# list. Default is "img applet". Case matters.
#
#
# AUTHOR
# Andrew Ryan <andrewr@nam-shub.com>
# $Id: http_integrity.monitor,v 1.1.1.1 2005/02/18 17:52:24 trockij Exp $
#
#
# COPYRIGHT
# Copyright (C) 2000, Andrew Ryan
#
# 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 strict;
use English;
use LWP::Parallel::UserAgent;
use LWP::UserAgent;
use HTML::LinkExtor;
use URI::URL;
use Time::HiRes qw( gettimeofday tv_interval );
use Getopt::Std;
use vars qw/$opt_s $opt_u $opt_n $opt_t $opt_a $opt_T/;
getopts ("su:n:t:a:t:T:");
my $url_path = $opt_u || "/"; #default URL path to test is "/"
my $max_req = $opt_n || 16; #maximum number of requests to issue at one time
my $page_timeout = $opt_T || 10; #timeout, in seconds, for whole page
my $item_timeout = $opt_t || int($page_timeout/2); #timeout, in seconds, for any given item
my $opt_s = "s" if $opt_s ;
my @retrieve_anchors = $opt_a ? split(' ', $opt_a) : ("img","applet");
my @failures = ();
my @details = ();
my ($host, $p, $url, $tag, %attr, %saw, @addl_links, $base, $res, $req, $entries);
my ($total_time, $time_begin, $time_end, $t0, $t1);
my ($res_bytes, $total_bytes);
my $ua = new LWP::UserAgent;
$ua->timeout ($item_timeout); # timeout, in seconds, for base page
my $pua = LWP::Parallel::UserAgent->new();
$pua->max_req ($max_req);
$pua->timeout ($item_timeout); # timeout, in seconds, for any given request
my $exit_status = 0; #default exit status is OK
foreach $host (@ARGV) {
# Set up a callback that collect image links
@addl_links = ();
$total_time = 0;
$url = "http$opt_s://${host}${url_path}";
# Make the parser. Unfortunately, we don't know the base yet
# (it might be diffent from $url)
$p = HTML::LinkExtor->new(\&callback);
# Request document and parse it as it arrives
$t0 = [Time::HiRes::gettimeofday];
$res = $ua->request(
HTTP::Request->new(GET => $url)
,sub {$p->parse($_[0])});
$t1 = [Time::HiRes::gettimeofday];
$total_time += Time::HiRes::tv_interval($t0, $t1);
if ($res->is_error) {
push (@failures, $host);
if ( $res->code == 408 ) {
push(@details, sprintf("ERROR: Timeout [%s seconds] retrieving %s", $item_timeout, $res->request->url ) ) if $res->is_error;
} else {
push(@details, sprintf("ERROR: %s [%s] retrieving %s", $res->code, $res->message, $res->request->url ) ) if $res->is_error;
}
$exit_status++;
next;
}
# Expand all image URLs to absolute ones
$base = $res->base;
@addl_links = map { $_ = url($_, $base)->abs; } @addl_links;
$res_bytes = length($res->as_string);
$total_bytes += $res_bytes;
# uniq the array of addl_links
undef %saw;
@saw{@addl_links} = ();
@addl_links = keys %saw;
foreach (@addl_links) {
next if /^https/i; #we don't do https here
$req = HTTP::Request->new('GET', "$_");
if ( $res = $pua->register ($req) ) {
push(@details, sprintf("ERROR: %s", $res->error_as_HTML) );
$exit_status++;
}
}
$t0 = [Time::HiRes::gettimeofday];
$entries = $pua->wait(); #now retrieve everything
$t1 = [Time::HiRes::gettimeofday];
$total_time += Time::HiRes::tv_interval($t0, $t1);
foreach (keys %$entries) {
$res = $entries->{$_}->response;
$res_bytes = length($res->content);
$total_bytes += $res_bytes;
$exit_status++ if $res->is_error;
if ( $res->code == 408 ) {
push(@details, sprintf("ERROR: Timeout [%s seconds] retrieving %s", $item_timeout, $res->request->url ) ) if $res->is_error;
} else {
push(@details, sprintf("ERROR: %s [%s] retrieving %s", $res->code, $res->message, $res->request->url ) ) if $res->is_error;
}
}
if ($total_time > $page_timeout) {
push (@failures, $host) ;
push (@details, sprintf("ERROR: $url took %.2f seconds for complete load (>%.1f seconds)", $total_time, $page_timeout) );
next;
}
if ($exit_status > 0) {
push (@failures, $host) ;
push(@details, sprintf("%s total bytes received in %s objects in %.2f seconds (%.2f bytes/sec)",$total_bytes, scalar(@addl_links)+1, $total_time, $total_bytes/$total_time) ) ;
}
}
if (@failures == 0) {
exit 0;
}
print "@failures\n";
print join("\n", @details);
exit $exit_status;
sub callback {
my($tag, %attr) = @_;
foreach (@retrieve_anchors) {
push(@addl_links, values %attr) if $tag eq $_;
}
}
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