Cannot show map image under WeatherMap plugin or Editor

[langnao]

Hi,

I have weathermap 0.97a plugin installed on cacti 0.87e.

Followed the installation steps as per instructed. Run check.php both on cli and using webbrower and everything returned fine.

The polling works fine and the png and html were created successfully. However, the image is not accessible under weathermap plugin. Even the editor is not showing any image. Direct access of the png image works (as shown by the attached image).

[Howie]

What does the httpd error_log say?

[langnao]

What does the httpd error_log say?

Nothing, no error.

For the 'Map Style' tab under Editor, the Sample of defined fonts not drawn too. Suspected the 'GD' thingy but double check that it is fine (support all features).

Running on RHEL5.4

[Howie]

OK, every now and then I get a bug report from someone about loading images from php. So the files are written OK, but the code that loads the images and streams them to the browser isn't right.

However, it doesn't seem to be universal - I use CentOS 5.4 here, and have no problem, for example, so you should be OK.

Look for the lines in editor.php that say:
header("Content-type: image/png");
and replace with:
header('Content-type: image/png');
ob_clean();
flush();
and see if that helps.

If it does, there are two similar places in weathermap-cacti-plugin.php that need the same change.

The odd part is that sometimes this change *causes* the problem...

[langnao]

OK, every now and then I get a bug report from someone about loading images from php. So the files are written OK, but the code that loads the images and streams them to the browser isn't right.

However, it doesn't seem to be universal - I use CentOS 5.4 here, and have no problem, for example, so you should be OK.

Look for the lines in editor.php that say:
header("Content-type: image/png");
and replace with:
header('Content-type: image/png');
ob_clean();
flush();
and see if that helps.

If it does, there are two similar places in weathermap-cacti-plugin.php that need the same change.

The odd part is that sometimes this change *causes* the problem...

Yes, it works!

Thanks. You save me from many more days of frustration ...

[gjames]

I tried the above fix and it didnt work for me.
I still get the same screens as the others.

Any help would be appreciated.
Also using
Cacti Version 0.8.7e
Cacti OS unix
Weathermap 0.97a editor
RHEL

Thanks

[gjames]

I went back to weathermap .87e and the above fix worked.

Thanks

[Howie]

There isn't a 0.87e... which version are you using now?

[gjames]

Actually it only partially fixed the problem.
The editor worked but I still get the broken image icon when I try to view the weathermaps. The png files are fine but the html in the output directory wont display.
No error in httpd.log or cacti.log.

Thanks

Cacti Version 0.8.7e
Cacti OS unix RHEL
SNMP Version NET-SNMP version: 5.3.2.2
RRDTool Version RRDTool 1.2.x

PHP Weathermap version 0.97a

[Howie]

The HTML in the output folder won't work if you just open it in a browser, that is correct. It's intended to be included from within the Cacti plugin, so the path to the image would be wrong if you just open that html file in a browser.

[gjames]

I dint realize there were 2 places to make the change above.
It appears the editors works now.
I'll see about the broken link icons.

THANKS

[martinhem]

Hello, I did changes on editor.php and weathermap-cacti-plugin.php but im still getting the same error.
Only solved "Font Samples" with this fix.

I tried 096a and 097 with cacti 0.8.7g.

2.6.32-23-server #37-Ubuntu SMP Fri Jun 11 09:11:11 UTC 2010 x86_64 GNU/Linux

Thanks

[Leddy]

OK, every now and then I get a bug report from someone about loading images from php. So the files are written OK, but the code that loads the images and streams them to the browser isn't right.

However, it doesn't seem to be universal - I use CentOS 5.4 here, and have no problem, for example, so you should be OK.

Look for the lines in editor.php that say:
header("Content-type: image/png");
and replace with:
header('Content-type: image/png');
ob_clean();
flush();
and see if that helps.

If it does, there are two similar places in weathermap-cacti-plugin.php that need the same change.

The odd part is that sometimes this change *causes* the problem...

This resolved our problem on Server 2008 R2.

FYI you need to edit editor.php and weathermap-cacti-plugin.php
Each file has 2 entries that need to be modified.