Fix graph errors wrong content type (#14574)

Some code was returning too soon and messing up the return type
Other code was simply not setting it

includes/html/functions.inc.php

@@ -11,6 +11,7 @@
  */
 
 use LibreNMS\Config;
+use LibreNMS\Enum\ImageFormat;
 use LibreNMS\Util\Number;
 use LibreNMS\Util\Rewrite;
 
@@ -436,28 +437,10 @@ function generate_port_image($args)
  * @param  string  $text
  * @param  int[]  $color
  */
-function graph_error($text, $color = [128, 0, 0])
+function graph_error($text, $short = null, $color = [128, 0, 0])
 {
-    echo \LibreNMS\Util\Graph::error($text, null, 300, null, $color);
-}
-
-/**
- * Output message to user in image format.
- *
- * @param  string  $text  string to display
- */
-function graph_text_and_exit($text)
-{
-    global $vars;
-
-    if ($vars['showcommand'] == 'yes') {
-        echo $text;
-
-        return;
-    }
-
-    graph_error($text, [13, 21, 210]);
-    exit;
+    header('Content-Type: ' . ImageFormat::forGraph()->contentType());
+    echo \LibreNMS\Util\Graph::error($text, $short, 300, null, $color);
 }
 
 function print_port_thumbnail($args)

includes/html/graphs/device/bits.inc.php

@@ -7,7 +7,7 @@ $ds_out = 'OUTOCTETS';
 $ports = dbFetchRows('SELECT * FROM `ports` WHERE `device_id` = ? AND `disabled` = 0 AND `deleted` = 0', [$device['device_id']]);
 
 if (empty($ports)) {
-    graph_text_and_exit('No Ports');
+    throw new \LibreNMS\Exceptions\RrdGraphException('No Ports');
 }
 
 $i = 0;

includes/html/graphs/device/processor.inc.php

@@ -3,7 +3,7 @@
 $procs = dbFetchRows('SELECT * FROM `processors` where `device_id` = ?', [$device['device_id']]);
 
 if (empty($procs)) {
-    graph_text_and_exit('No Processors');
+    throw new \LibreNMS\Exceptions\RrdGraphException('No Processors');
 }
 
 if (\LibreNMS\Config::getOsSetting($device['os'], 'processor_stacked')) {

includes/html/graphs/device/storage.inc.php

@@ -11,7 +11,7 @@ $rrd_options .= " COMMENT:'                        Size      Used    % Used\\l'"
 $storages = dbFetchRows('SELECT * FROM storage where device_id = ?', [$device['device_id']]);
 
 if (empty($storages)) {
-    graph_text_and_exit('No Storage');
+    throw new \LibreNMS\Exceptions\RrdGraphException('No Storage');
 }
 
 foreach ($storages as $storage) {

includes/html/graphs/graph.inc.php

@@ -42,13 +42,12 @@ if ($auth && is_customoid_graph($type, $subtype)) {
 } elseif ($auth && is_file(Config::get('install_dir') . "/includes/html/graphs/$type/$subtype.inc.php")) {
     include Config::get('install_dir') . "/includes/html/graphs/$type/$subtype.inc.php";
 } else {
-    graph_error("$type*$subtype ");
-    // Graph Template Missing");
+    graph_error("$type*$subtype Graph Template Missing", "$type*$subtype");
 }
 
 if ($auth === null) {
     // We are unauthenticated :(
-    graph_error($width < 200 ? 'No Auth' : 'No Authorization');
+    graph_error('No Authorization', 'No Auth');
 
     return;
 }
@@ -76,7 +75,7 @@ if (! empty($command_only)) {
 }
 
 if (empty($rrd_options)) {
-    graph_error($width < 200 ? 'Def Error' : 'Graph Definition Error');
+    graph_error('Graph Definition Error', 'Def Error');
 
     return;
 }
@@ -98,8 +97,8 @@ try {
     }
 
     if (isset($rrd_filename) && ! Rrd::checkRrdExists($rrd_filename)) {
-        graph_error($width < 200 ? 'No Data' : 'No Data file ' . basename($rrd_filename));
+        graph_error('No Data file ' . basename($rrd_filename), 'No Data');
     } else {
-        graph_error($width < 200 ? 'Draw Error' : 'Error Drawing Graph: ' . $e->getMessage());
+        graph_error('Error Drawing Graph: ' . $e->getMessage(), 'Draw Error');
     }
 }

includes/html/graphs/macaccounting/auth.inc.php

@@ -1,5 +1,7 @@
 <?php
 
+use LibreNMS\Exceptions\RrdGraphException;
+
 if (is_numeric($vars['id'])) {
     $acc = dbFetchRow('SELECT * FROM `mac_accounting` AS M, `ports` AS I, `devices` AS D WHERE M.ma_id = ? AND I.port_id = M.port_id AND I.device_id = D.device_id', [$vars['id']]);
 
@@ -25,14 +27,14 @@ if (is_numeric($vars['id'])) {
                 $title .= ' :: ' . \LibreNMS\Util\Rewrite::readableMac($acc['mac']);
                 $auth = true;
             } else {
-                graph_error('file not found');
+                throw new RrdGraphException('file not found');
             }
         } else {
-            graph_error('unauthenticated');
+            throw new RrdGraphException('unauthenticated');
         }
     } else {
-        graph_error('entry not found');
+        throw new RrdGraphException('entry not found');
     }
 } else {
-    graph_error('invalid id');
+    throw new RrdGraphException('invalid id');
 }