Observium_CE/html/includes/graphs/graph.inc.php

<?php
/**
 * Observium
 *
 *   This file is part of Observium.
 *
 * @package    observium
 * @subpackage graphs
 * @copyright  (C) 2006-2013 Adam Armstrong, (C) 2013-2021 Observium Limited
 *
 */

#ob_clean();

// Init & clean
//print_vars($index);
unset($index); // Clean accidentally global vars
$total_start = utime();

// Init global var for information about generated graph
$graph_return = [
  'status'        => FALSE, // --> $GLOBALS['rrd_status']
  'command'       => '',    // --> $GLOBALS['exec_status']['command'] added in rrdtool_graph()
  'output'        => '',    // --> $GLOBALS['exec_status']['stdout']  added in rrdtool_graph()
  'runtime'       => 0,     // --> $GLOBALS['exec_status']['runtime'] added in rrdtool_graph()
  'total'         => 0,     // total runtime for graph script
  'rrds'          => [],    // list of used rrd files           added in get_rrd_path()
  'filename'      => '',    // Generated image filename
  'descr'         => '',    // graph description if exist
  'valid_options' => [],    // hrm, used somewhere
];

preg_match('/^(?P<type>[a-z0-9A-Z-]+)_(?P<subtype>[a-z0-9A-Z-_]+)/', $vars['type'], $graphtype);

if (isset($vars['format']) && array_key_exists($vars['format'], $config['graph_formats'])) {
  $extension = $config['graph_formats'][$vars['format']]['extension'];
  $mimetype  = $config['graph_formats'][$vars['format']]['mimetype'];
  $img_format = strtoupper($vars['format']);
} else {
  $extension = 'png';
  $mimetype  = 'image/png';
}

$graphfile = $config['temp_dir'] . "/"  . strgen() . "." . $extension;

if (OBS_DEBUG) { print_vars($graphtype); }

if (isset($graphtype['type']) && isset($graphtype['subtype'])) {
  $type = $graphtype['type'];
  $subtype = $graphtype['subtype'];
} else {
  graph_error("Invalid graph type format.");
  exit;
}

// Get device array
if (is_intnum($vars['device'])) {
  $device = device_by_id_cache($vars['device']);
} elseif (!safe_empty($vars['device'])) {
  $device = device_by_name($vars['device']);
} elseif ($type === 'device' && is_intnum($vars['id'])) {
  $device = device_by_id_cache($vars['id']);
}

// $from, $to - unixtime (or rrdgraph time interval, i.e. '-1d', '-6w')
// $timestamp_from, $timestamp_to - timestamps formatted as 'Y-m-d H:i:s'
if (isset($vars['timestamp_from']) && preg_match(OBS_PATTERN_TIMESTAMP, $vars['timestamp_from'])) {
  $vars['from'] = strtotime($vars['timestamp_from']);
}
if (isset($vars['timestamp_to']) && preg_match(OBS_PATTERN_TIMESTAMP, $vars['timestamp_to'])) {
  $vars['to'] = strtotime($vars['timestamp_to']);
}

// Validate rrdtool compatible time string and set to now/day if it's not valid
if (preg_match(OBS_PATTERN_RRDTIME, $vars['to']))   { $to   = $vars['to'];   }// else { $to     = $config['time']['now']; }
if (preg_match(OBS_PATTERN_RRDTIME, $vars['from'])) { $from = $vars['from']; }// else { $from   = $config['time']['day']; }

if (isset($vars['period']) && is_numeric($vars['period'])) {
  $to     = time();
  $from   = time() - $vars['period'];
  $period = $vars['period'];
} elseif(preg_match('/[\-]*\d+[s|w|m|d|y|h]/', $vars['from'])) {
  // It seems we have AT-style/timespec. Just pass it through (some features will break because we can't calculate period)
  $from = $vars['from'];
  if(preg_match('/[\-]*\d+[s|w|m|d|y|h]/', $vars['to'])) { $to = $vars['to']; } else { $to = 'NOW'; }
} else {
  $from = (isset($vars['from'])) ? $vars['from'] : time() - 86400;
  $to   = (isset($vars['to'])) ? $vars['to'] : time();
  if ($from < 0) { $from = $to + $from; }
  $period = $to - $from;
}

// Set prev_from & prev_to if we have a period
if(isset($period)) {
  $prev_from = $from - $period;
  $prev_to   = $from;
}

$graph_include = FALSE;
$definition_include = FALSE;
//print_message("Graph type: $type, subtype: $subtype");

if (is_file($config['html_dir'] . "/includes/graphs/$type/$subtype.inc.php"))
{
  $graph_include = $config['html_dir'] . "/includes/graphs/$type/$subtype.inc.php";
}
elseif (is_array($config['graph_types'][$type][$subtype]['ds']))
{
  // Init tags array
  $tags = [];

  // Additional include with define some graph variables like $unit_text, $graph_title
  // Currently only for indexed definitions
  if ($config['graph_types'][$type][$subtype]['index'] &&
      is_file($config['html_dir'] . "/includes/graphs/$type/definition.inc.php"))
  {
    $definition_include = $config['html_dir'] . "/includes/graphs/$type/definition.inc.php";
  }
  $graph_include = $config['html_dir'] . "/includes/graphs/generic_definition.inc.php";
}
elseif (is_file($config['html_dir'] . "/includes/graphs/$type/graph.inc.php"))
{
  $graph_include = $config['html_dir'] . "/includes/graphs/$type/graph.inc.php";
}

if ($graph_include)
{
  include($config['html_dir'] . "/includes/graphs/$type/auth.inc.php");

  if (isset($auth) && $auth)
  {
    if ($definition_include)
    {
      include_once($definition_include);
    }

    include($graph_include);
  }
} elseif(!isset($vars['command_only'])) {
  graph_error('no '. $type.'_'.$subtype.''); // Graph Template Missing
}

if ($error_msg) {
  // We have an error :(
  graph_error($graph_error);
} elseif (!$auth) {
  // We are unauthenticated :(
  if ($width < 200) {
    graph_error("No Auth");
  } else {
    graph_error("No Authorization");
  }
} else {
  #$rrd_options .= " HRULE:0#999999";
  if ($no_file) {
    if ($width < 200) {
      graph_error("No RRD");
    } else {
      graph_error("Missing RRD Datafile");
    }
  } elseif (isset($vars['command_only']) && $vars['command_only'] == TRUE) {
    $return = rrdtool_graph($graphfile, $rrd_options);
    //print_vars($GLOBALS['exec_status']);

    unlink($graphfile);

    if (isset($config['graph_types'][$type][$subtype]['long']) && empty($graph_return['descr']))
    {
      $graph_return['descr'] = $config['graph_types'][$type][$subtype]['long'];
    }
  } else {
    if ($rrd_options) {
      rrdtool_graph($graphfile, $rrd_options);
      //print_debug($rrd_cmd);
      if (is_file($graphfile)) {
        if ($vars['image_data_uri'] == TRUE) {
          $image_data_uri = data_uri($graphfile, $mimetype);
        } elseif (!OBS_DEBUG) {
          $fd = fopen($graphfile, 'rb');
          header('Content-type: '.$mimetype);
          header('Content-Disposition: inline; filename="'.basename($graphfile).'"');
          header('Content-Length: ' . filesize($graphfile));
          fpassthru($fd);
          fclose($fd);
        } else {
          external_exec('/bin/ls -l '.$graphfile);
          echo('<img src="'.data_uri($graphfile, $mimetype).'" alt="graph" />');
        }
        unlink($graphfile);
      } else {
        if ($width < 200) {
          graph_error("Draw Error");
        } else {
          graph_error("Error Drawing Graph");
        }
      }
    } else {
      if ($width < 200) {
        graph_error("Def Error");
      } else {
        graph_error("Graph Definition Error");
      }
    }
  }
}

// Total runtime and clean graph file
$graph_return['total'] = utime() - $total_start;
if (strlen($graph_return['filename']) && is_file($graph_return['filename'])) {
  unlink($graph_return['filename']);
}

// EOF