On Thu, Jul 20, 2006 at 07:09:26PM -0400, Epp, Matthew Contractor PEO EIS AKO wrote:
The one feature I'm focusing on right now is similar to the "Instructions" section handled by NKedit. In my custom BB, I edited a section of dohostsvc.c to read in files containing plain text or html. This content gets placed at the bottom of any page generated from bb-dohostsvc.sh. [snip] What I need to do now is decide how best to proceed with setting this up in Hobbit. I'd like to be able to edit the content from the web interface somehow. The "Instruction" field in the existing nkedit is good for short comments, but we've been using long descriptive html output with web links and such. With some experimentation, I found that you can do the same thing in nkedit, but you have to remove any special tags like nbsp; and all newline characters or it makes the hobbit-nkview.cfg file unreadable.
I'm going to start looking at the source for bb-hostsvc.sh tomorrow to see where I'd need to make changes, but I wanted to throw this out there to see if anyone had any thoughts. If anyone else would also like my existing code for BB, I can post that. :)
You're welcome to look at the source code, but this particular bit of Hobbit is not one of the prettier in terms of how it's implemented :-) Eventually you will end up in lib/htmllog.c and try to tweak that.
However, I think you could do this without changing a single line of code in Hobbit. The ~hobbit/server/web/hostsvc_footer is already inserted at the bottom of all the status pages (in the default setup, it's just a link to bb_footer, but copy that and make your own file).
You can implement your custom instructions by adding an HTML "object" to that file; you can get the hostname and columnname of the host being viewed by using &BBHOST and &BBSVC placeholders. So you can use this as parameters to a CGI script that delivers your instructions for this specific host+test combination, and by embedding it in an <object> section, it will automatically be shown as part of the status page.
E.g. in the hostsvc_footer you add
<center>
<object
data="&CGIBINURL/instructions.sh?HOST=&BBHOST&SVC=&BBSVC"
type="text/html" width="60%">
No instructions
</object>
</center>near the top of the hostsvc_footer filer.
Your "instructions.sh" script would need to grab the QUERY_STRING environment variable which holds the HOST and SVC parameters, match those against your configuration file, and output an HTML document with the instructions. A simple shell script would be something like (note that writing GCI shell scripts are a bad idea, security-wise):
#!/bin/sh
set echo "$QUERY_STRING" | sed -e 's!&! !g'
while test "$1" != ""; do
case "$1" in
HOST=*)
HOSTNAME=echo $1 | cut -d= -f2
;;
SVC=*)
SERVICE=echo $1 | cut -d= -f2
;;
esac
shiftdone
echo "Content-type: text/html" echo "" echo "<!DOCTYPE HTML PUBLIC \"-//W3C//DTD HTML 4.01 Transitional//EN\" \"http://www.w3.org/TR/html4/loose.dtd\">" echo "<html><head><title>Instructions</title></head>" echo "<body bgcolor=\"#ffffff\">" echo "These are the instructions for host $HOSTNAME / service $SERVICE" echo "</body></html>" echo ""
exit 0
Similar things can be written in Perl, Python, C or whatever your preferred language may be. Note that setting a <font> or BGCOLOR is necessary; my first tests of this ended up with black-on-black which is not easy to read :-)
One nice aspect of this is that you have completely de-coupled the maintenance of the instructions from Hobbit. If you have a content management system for uploading the instructions, you can use that to maintain the data. Or any other tool which is appropriate.
Regards, Henrik