statusmap.cgi and PNG output

[Subhendu Ghosh]

The images cannot be generated separately from the existing cgis.

-sg


On Tue, 3 Jun 2003, [iso-8859-15] Jesús M. NAVARRO wrote:

> Hi, list:
> 
> I'm following on my intent for a drop-in replacement for nagios user 
> interface.
> 
> Rigth now, V 0.4.8 (released today) is able to manage cmd.cgi, and only 
> pendant question is how to manage those CGIs that embed images.  Now I'm 
> trying to make it work with statusmap.cgi.
> 
> It seems that something like 
> http://localhost/nagios/cgi-bin/statusmap.cgi?host=all&createimage&canvas_x=0&canvas_y=0&canvas_width=593&canvas_height=552&max_width=0&max_height=0&layout=5&layermode=exclude
> 
> (quite a long URL, isn't it?) does output the PNG image, and I'm trying to 
> wrap this invocation within a PHP file by calling the CGI as a command line 
> program.
> 
> For this to work, I do something like this:
> 		putenv("REQUEST_METHOD=GET");
> 		putenv("REMOTE_USER=username");
> 		putenv("QUERY_STRING=" . $query_string);
> 			$cgi=CGI_PATH . "statusmap.cgi";
>  			$cgi_output=system($cgi);
> 
> ...where, as you can imagine, $query_string equals 
> "host=all&createimage&canvas_x=0&canvas_y=0&..."
> 
> This approach does work for "simple" CGIs, like tac.cgi (the Tactical Overview 
> one).  Problem is that the above invocation DOES NOT return just the PNG 
> "file" but the HTTP headers too (Content-type, no cache, etc.).
> 
> Though I had a look at the statusmap source code, I haven been able to 
> discover if there's any way to call the CGI so it just returns the plain 
> image, so I can return it to the client browser the way it have to.
> 
> Well, I hope someone can guide me through this one.
> 

-- 





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