[HOWTO] JPEG support in Cacti & Thold using ImageMagick

[kschlegelmilch]

My cellphone only supports JPG, so in order to get the image sent as JPG I downloaded ImageMagick (http://www.imagemagick.org/script/index.php) and then modified the thold-functions.php and modified the following lines (line numbers might be off a bit, but you'll get close enough). I've also attached the modified file. Make sure you backup your old file before using this one.

The tmpdir can be anywhere but must pretty much have rw-rw-rw- for it to work. At first I tried the /tmp, but it didn't work.

line 91:

$file_array = array(0 => array('local_graph_id' => $graph_id, 'rra_id' => 0, 'file' => "$httpurl/graph_image.php?local_graph_id=$graph_id&rra_id=0&graph_height=100&graph_width=250",'mimetype'=>'image/jpg','filename'=>"$graph_id"));

line 785:

$graph_data_array = array("output_flag" => RRDTOOL_OUTPUT_STDOUT, "graph_height" => 100, "graph_width" => 250);

line 788:

// adding jpg support
$tmpdir = "/usr/local/apache2/htdocs/cacti/plugins/thold/tmp/";
$pngfile = $tmpdir.$val['filename'].".png";
$jpgfile = $tmpdir.$val['filename'].".jpg";
$handle = fopen($pngfile,'w+');
fwrite($handle, $data);
fclose($handle);
$command = "/usr/local/bin/convert ".$pngfile." ".$jpgfile;
exec($command);
$jhandle = fopen($jpgfile,'r');
$jdata = fread($jhandle, filesize($jpgfile));
fclose($jhandle);
$cid = md5(uniqid(time()));
$mail->AddStringEmbedAttachment($jdata, $val['filename'].'.jpg', $cid, 'base64', $val['mimetype']); // optional name
// adding jpg support

[rony]

Strange, what cell phone is this?

[kschlegelmilch]

[rony]

Lotus Notes doesn't support png at all.

I find this interesting and may add this to the mailer class I wrote for the PIA.