[Nagiosplug-devel] check_http + proxy
Stanley Hopcroft
Stanley.Hopcroft at IPAustralia.Gov.AU
Sat Jan 1 01:14:08 CET 2005
Dear Sir,
I am writing to thank you for your letter and say,
On Fri, Dec 31, 2004 at 06:49:46PM +0100, Julien TOUCHE wrote:
> >tsitc> ./check_http -H a.b.c.d -u http://cisco.com/ -v |& more
> thanks a lot, it works good, but ...
>
> it does not seem to work with https://host
>
Oh. I guess that it is unlikely to (the check needs to invoke the
CONNECT method on the proxy not a GET or POST) without significant
hacking.
> note: i try also the check_wget but
> # /export/tmp/check_wget -p proxy:port www
> http://www - Object not found WARNING
>
I am sorry about that (not familiar with wget although it is popular).
Stand alone tools include :- lynx (it comes in a plain and SSL vers)
Libraries include (Perl only) :
CURL: very popular Perl extension.
To my mind, interface is not as flexible as LWP (and I
don't know if it does SSL although I would be suprised if it
didn't)
LWP: very popular and proven. Requires Crypt::SSLeay for
near transparent (to client code) SSL access - by setting
env var.
eg Here's part of a plugin based on Nagios::WebTransact (a LWP wrapper
that is deprecated except for me)
my $QwebPrd_viewer =
'https://qwebprd.questel.fr/imag2000/en/logon.html' ;
my $QwebPrd_viewer_exp = 'Welcome to Questel-Orbit - Your guide to
Intellectual Property' ;
my $SquidFault = 'X-Squid-Error: ERR' ;
my $Proxy = { server => 'http://a.b.c.d:80' } ;
# Crypt::SSLeay support for proxys
$ENV{HTTPS_PROXY} = 'http://a.b.c.d:80' ;
# Crypt::SSLeay support for proxys
my $URLS = [
{Method => 'GET', Url => $QwebPrd_viewer, Qs_var => [], Qs_fixed
=> [], Exp => $QwebPrd_viewer_exp, Exp_Fault => $SquidFault},
] ;
my $x = Nagios::WebTransact->new( $URLS ) ;
my ($rc, $message) = $x->check( {}, timeout => $timeout || $TIMEOUT,
debug => $debug, proxy => $Proxy ) ;
print "QwebPrd start page. $message\n" ;
exit($rc ? $ERRORS{'OK'} : $ERRORS{'CRITICAL'}) ;
You may even be able to get away with LWP::Simple for one-shot
https URLs.
It's an easy library to live with (written by a cast of thousands
including Gisle Aas).
Other LWP based classes: eg WWW::Automate
These provide a simplified API to LWP for the common cases of
GET|POSTing URLs and matching the HTML against regexps (used for web
transaction health checks, in which a transaction consists of a
sequence of web pages [register, search, examine details, clean-up]).
WWW::Automate is actively developed by a known good developer (Andy
Lester). It would prob do what you want in 1 line of client code.
All but CURL on a CPAN near you.
BTW, thanks very much for your contributions to Ntop and other good
things.
Yours sincerely.
--
Stanley Hopcroft
IP Australia
Ph: (02) 6283 3189 Fax: (02) 6281 1353
PO Box 200 Woden ACT 2606
http://www.ipaustralia.gov.au
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