[rrd-users] Re: Newbie Help - RRDs::Graph and STDOUT

[Serge Maandag]

the print "ERROR... part isn't going to do you much good.
You already printed that an image/png is coming next, so the browser
will not display the errorstring.

You could better 'die' or 'warn' the error, that way it ends up in your
webservers error-log.

Also, I don't see why you print: <img src="/cgi-bin/rrdgraph3.cgi"
alt="">
It belongs in the part where you are writing html, not the part where
you are generating an image.

Serge.


-----Original Message-----
From: Block, Ryan FTL [mailto:RBlock at citco.com] 
Sent: Wednesday, May 21, 2003 11:26 PM
To: rrd-users at list.ee.ethz.ch
Subject: [rrd-users] Newbie Help - RRDs::Graph and STDOUT 


I have a cgi script that is writing the output of RRDs::graph to STDOUT.
When I run the cgi from my web browser, all I get is a "cannot be
displayed
error". The script runs fine from command line.
Any suggestions on how to accomplish this would be appreciated. Here is
a
snippet of my code that is failing.
 print "Content-type: image/png\n\n";
 RRDs::graph("-", @args);
 my $ERR = RRDs::error;
 print "ERROR while creating $host: $ERR\n" if $ERR;
 print qq(<img src="/cgi-bin/rrdgraph3.cgi" alt="">);


Ryan Block
WAN Engineer
Citco Technology Mgt.
rblock at citco.com





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