(Take 2) Re: Using proxy for http requests 🔗 link

(Sorry, hit 'Send' a little too early there.)


Agreed that that's probably something that should be taken into account as
well.

The key is the principle of least surprise for a sysadmin who's monitoring
things. As to whether presuming the system proxy should be used or whether
we should assume that testing http://www.example.net/ means testing just
that, I'm not sure the answer to.

There other big issue, in particular is that there's no specific syntax
for *ignoring* a proxy, so before any sort of global override is allowed,
there'd need to be a means for that.


Regards,

-jc


On Sun, May 24, 2015 5:54 pm, Galen Johnson wrote:

So it won't honor the system proxy server environment variable (ie,
export http_proxy=myproxy.example.com:3128)?  Seems like a bit of an
oversight...I could understand if you want to override the proxy to use
something different but not just ignore it.  Note...this is from the
xymon server only.

=G=

From: J.C. Cleaver <user-87556346d4af@xymon.invalid>
Sent: Sunday, May 24, 2015 2:55 PM
To: Galen Johnson
Cc: xymon at xymon.com
Subject: Re: [Xymon] Using proxy for http requests

On Sat, May 23, 2015 6:21 pm, Galen Johnson wrote:

?Bumping this in case it got lost in the upgrade issue flood...


=G=


From: Xymon <xymon-bounces at xymon.com> on behalf of Galen Johnson

<user-87f955643e3d@xymon.invalid>

Sent: Thursday, May 21, 2015 11:25 AM
To: xymon at xymon.com
Subject: [Xymon] Using proxy for http requests


I must be somewhat dense today but I need to use a proxy server for ALL
http requests and I can't tell if I need to use --proxy (and if so,
which
stanza since this is a built-in server-side test) or if I just set the
environment variable http_proxy= will work.  I would prefer not to have
to
add it to all of my http tests individually and it's also not clear if
that syntax will work for the "apache=" entries.

I'm looking through the code and it seems that for xymonnet http testing

(as opposed to submitting messages via HTTP and xymoncgimsg.cgi),
there's no universal way of specifying a proxy for all URLs that are
being tested.

The proxy needs to be added to the URL as in
https://www.xymon.com/help/manpages/man5/hosts.cfg.5.html#lbAR and then

--bb-proxy-syntax needs to tb enabled on the xymonnet command line
https://www.xymon.com/help/manpages/man1/xymonnet.1.html#lbAH

http_proxy= (and --proxy) are used by the xymon command-line utility for
submitting messages, but not testing.


On the bright side, this _should_ work for apache= tests as well (along
with any of the http test variants, like post/soap, etc).

This seems like something that could be added in in a future release,
either on a per-host, a per-.default.-host, a global variable basis.


Regards,

-jc

Curl allows you to bypass the proxy with the '--noproxy' option.  I have to say that as a sysadmin I was surprised that Xymon wouldn't honor my proxy setting ;-).  Having "http_proxy" or "HTTP_PROXY" in the xymonserver.cfg file would seem reasonable...or even a "USE_SYSTEM_PROXY" defaults to "false" setting along with the PROXY_HOST and PROXY_PORT config option for when true (or assume false if PROXY_HOST is unset).  You should still be able to define the proxy info in the hosts.cfg file to override the setting same as you would do today.  I say this next statement not being a developer...seems like it would be easy to do :-).  If I knew which files to tweak, I might even take a stab at it myself.

=G=

From: J.C. Cleaver <user-87556346d4af@xymon.invalid>
Sent: Sunday, May 24, 2015 10:23 PM
To: Galen Johnson
Cc: xymon at xymon.com
Subject: (Take 2) Re: [Xymon] Using proxy for http requests

(Sorry, hit 'Send' a little too early there.)


Agreed that that's probably something that should be taken into account as
well.

The key is the principle of least surprise for a sysadmin who's monitoring
things. As to whether presuming the system proxy should be used or whether
we should assume that testing http://www.example.net/ means testing just
that, I'm not sure the answer to.

There other big issue, in particular is that there's no specific syntax
for *ignoring* a proxy, so before any sort of global override is allowed,
there'd need to be a means for that.


Regards,

-jc


On Sun, May 24, 2015 5:54 pm, Galen Johnson wrote:

<user-87f955643e3d@xymon.invalid>

(as opposed to submitting messages via HTTP and xymoncgimsg.cgi),
there's no universal way of specifying a proxy for all URLs that are
being tested.

--bb-proxy-syntax needs to tb enabled on the xymonnet command line
https://www.xymon.com/help/manpages/man1/xymonnet.1.html#lbAH