[hobbit] Testing external web through a proxy

[Ralph Mitchell]

Heh - dude, that wasn't supposed to be the *whole* script...  :)

If that one was useful, here's something that may be a bit better.  I added
a timeout for curl, otherwise it'll wait for a long time if the server
doesn't respond.  Also, this format produces a message formatted just like
Xymon's internal http test, including the time taken to grab the headers.
You could extract the "Seconds" line to determine if the response is a bit
slow.  With a bit more magic in Xymon's configs, you could even graph it...

Ralph Mitchell

============= cut here ============
#!/bin/sh

TESTHOST=www.google.com
TESTURL=http://$TESTHOST/

TIMEOUT=30

# Grab *just* the headers, simulating Xymon's builtin http check
MESSAGE=`curl -x http://ourproxy.ourdomain.com:8080 \
     --proxy-anyauth -U hobbituser:hobbitpassword \
     -m $TIMEOUT \
     -w 'Seconds:     %{time_total}\n' \
     -s -S -L -I $TESTURL | $GREP -v Set-Cookie`

if [ "$?" -eq "0" ]; then
  COLOR=green
else
  COLOR=red
fi

# convert dots to commas in the hostname
MACHINE=`echo $TESTHOST | $SED -e 's/\./\,/g'

$BB $BBDISP "status $MACHINE.home $COLOR `date`

$MESSAGE"
============= cut here ============



On Sun, Nov 23, 2008 at 9:04 PM, Everett, Vernon <
Vernon.Everett at woodside.com.au> wrote:

>  Hi Ralph
>
> This script works a treat.
>
> Thanks
>     Vernon
>
>  ------------------------------
> *From:* Ralph Mitchell [mailto:ralphmitchell at gmail.com]
> *Sent:* Saturday, 22 November 2008 12:23 AM
> *To:* hobbit at hswn.dk
> *Subject:* Re: [hobbit] Testing external web through a proxy
>
> Looks like your proxy requires authentication via Kerberos or NTLM or
> GSS-Negotiate.  Dunno if Xymon can do those.  Luckily the curl tool
> (httpp://curl.haxx.se) *can* do those...  I haven't had to use them, but
> it should not be too hard to bang out an ext script to do the check.
> Something along these lines:
>
>      #!/bin/sh
>      curl -x http://ourproxy.ourdomain.com:8080 \
>            --proxy-anyauth -U hobbituser:hobbitpassword \
>            -s -S -L -o /dev/null http://www.google.com/
>      if [ "$?" -eq "0" ]; then
>        COLOR=green
>        MESSAGE="Pinged Google OK"
>      else
>        COLOR=RED
>        MESSAGE="Failed to reach Google"
>      fi
>      $BB $BBDISP "status www,google,com.home $COLOR `date`
> $MESSAGE"
>
> Obviously that can be expanded quite a lot...  :)  Drop it somewhere on
> your Xymon server (maybe in server/ext) and set up a block in
> server/etc/hobbitlaunch.cfg to fire it off as often as you want.  You may
> need to give the full path for curl, which is probably /usr/bin/curl.
>
> Ralph Mitchell
>
>
> On Fri, Nov 21, 2008 at 1:30 AM, Everett, Vernon <
> Vernon.Everett at woodside.com.au> wrote:
>
>>  Hi all
>>
>> I am trying to test our interent connectivity by checking Google through
>> our proxy.
>> (Once I get this right, I want to start testing some of our external web
>> pages in the same manner)
>>
>> I have configured this in bb-hosts
>> 0.0.0.0         *www.google.com* <http://www.google.com>          #
>> noconn *
>> http://hobbituser:hobbitpassword@ourproxy.ourdomain.com:8080/http://www.google.com
>> *<http://hobbituser:hobbitpassword@ourproxy.ourdomain.com:8080/http://www.google.com>
>>
>> And I get this.
>> *yellow* <http://hobbit/hobbit/gifs/yellow.gif> *
>> http://www.google.com.au/* <http://www.google.com.au/> - Proxy
>> Authentication Required
>>
>> HTTP/1.1 407 Proxy Authentication Required ( The ISA Server requires
>> authorization to fulfill the request. Access to the Web Proxy filter is
>> denied.  )
>> Via: 1.1 PXYHOSTNAME
>> Proxy-Authenticate: Negotiate
>> Proxy-Authenticate: Kerberos
>> Proxy-Authenticate: NTLM
>> Connection: Keep-Alive
>> Proxy-Connection: Keep-Alive
>> Pragma: no-cache
>> Cache-Control: no-cache
>> Content-Type: text/html
>> Content-Length: 4118
>>
>> Seconds:     0.02
>>
>> Any assistance appreciated.
>>
>> Regards
>>     Vernon
>>
>>
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