mirror of
https://github.com/librenms/librenms.git
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fca6fafb60
git-svn-id: http://www.observium.org/svn/observer/trunk@966 61d68cd4-352d-0410-923a-c4978735b2b8
225 lines
8.2 KiB
PHP
Executable File
225 lines
8.2 KiB
PHP
Executable File
<?php // vim:fenc=utf-8:filetype=php:ts=4
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/*
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* Copyright (C) 2009 Bruno Prémont <bonbons AT linux-vserver.org>
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*
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* This program is free software; you can redistribute it and/or modify it under
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* the terms of the GNU General Public License as published by the Free Software
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* Foundation; only version 2 of the License is applicable.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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* details.
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*
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* You should have received a copy of the GNU General Public License along with
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* this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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if($_GET['debug']) {
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ini_set('display_errors', 1);
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ini_set('display_startup_errors', 0);
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ini_set('log_errors', 0);
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ini_set('allow_url_fopen', 0);
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ini_set('error_reporting', E_ALL);
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}
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include("../includes/defaults.inc.php");
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include("../config.php");
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include("../includes/functions.php");
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include("includes/authenticate.inc.php");
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if(!$_SESSION['authenticated']) { echo("not authenticated"); exit; }
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function makeTextBlock($text, $fontfile, $fontsize, $width) {
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// TODO: handle explicit line-break!
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$words = explode(' ', $text);
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$lines = array($words[0]);
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$currentLine = 0;
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foreach ($words as $word) {
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$lineSize = imagettfbbox($fontsize, 0, $fontfile, $lines[$currentLine] . ' ' . $word);
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if($lineSize[2] - $lineSize[0] < $width) {
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$lines[$currentLine] .= ' ' . $word;
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} else {
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$currentLine++;
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$lines[$currentLine] = $word;
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}
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}
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error_log(sprintf('Handles message "%s", %d words => %d/%d lines', $text, count($words), $currentLine, count($lines)));
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return implode("\n", $lines);
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}
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/**
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* No RRD files found that could match request
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* @code HTTP error code
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* @code_msg Short text description of HTTP error code
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* @title Title for fake RRD graph
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* @msg Complete error message to display in place of graph content
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*/
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function error($code, $code_msg, $title, $msg) {
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global $config;
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header(sprintf("HTTP/1.0 %d %s", $code, $code_msg));
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header("Pragma: no-cache");
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header("Expires: Mon, 01 Jan 2008 00:00:00 CET");
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header("Content-Type: image/png");
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$w = $config['rrd_width']+81;
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$h = $config['rrd_height']+79;
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$png = imagecreate($w, $h);
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$c_bkgnd = imagecolorallocate($png, 240, 240, 240);
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$c_fgnd = imagecolorallocate($png, 255, 255, 255);
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$c_blt = imagecolorallocate($png, 208, 208, 208);
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$c_brb = imagecolorallocate($png, 160, 160, 160);
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$c_grln = imagecolorallocate($png, 114, 114, 114);
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$c_grarr = imagecolorallocate($png, 128, 32, 32);
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$c_txt = imagecolorallocate($png, 0, 0, 0);
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$c_etxt = imagecolorallocate($png, 64, 0, 0);
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if (function_exists('imageantialias'))
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imageantialias($png, true);
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imagefilledrectangle($png, 0, 0, $w, $h, $c_bkgnd);
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imagefilledrectangle($png, 51, 33, $w-31, $h-47, $c_fgnd);
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imageline($png, 51, 30, 51, $h-43, $c_grln);
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imageline($png, 48, $h-46, $w-28, $h-46, $c_grln);
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imagefilledpolygon($png, array(49, 30, 51, 26, 53, 30), 3, $c_grarr);
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imagefilledpolygon($png, array($w-28, $h-48, $w-24, $h-46, $w-28, $h-44), 3, $c_grarr);
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imageline($png, 0, 0, $w, 0, $c_blt);
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imageline($png, 0, 1, $w, 1, $c_blt);
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imageline($png, 0, 0, 0, $h, $c_blt);
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imageline($png, 1, 0, 1, $h, $c_blt);
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imageline($png, $w-1, 0, $w-1, $h, $c_brb);
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imageline($png, $w-2, 1, $w-2, $h, $c_brb);
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imageline($png, 1, $h-2, $w, $h-2, $c_brb);
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imageline($png, 0, $h-1, $w, $h-1, $c_brb);
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imagestring($png, 4, ceil(($w-strlen($title)*imagefontwidth(4)) / 2), 10, $title, $c_txt);
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imagestring($png, 5, 60, 35, sprintf('%s [%d]', $code_msg, $code), $c_etxt);
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if (function_exists('imagettfbbox') && is_file($config['error_font'])) {
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// Detailled error message
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$fmt_msg = makeTextBlock($msg, $errorfont, 10, $w-86);
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$fmtbox = imagettfbbox(12, 0, $errorfont, $fmt_msg);
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imagettftext($png, 10, 0, 55, 35+3+imagefontwidth(5)-$fmtbox[7]+$fmtbox[1], $c_txt, $errorfont, $fmt_msg);
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} else {
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imagestring($png, 4, 53, 35+6+imagefontwidth(5), $msg, $c_txt);
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}
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imagepng($png);
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imagedestroy($png);
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}
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/**
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* No RRD files found that could match request
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*/
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function error404($title, $msg) {
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return error(404, "Not found", $title, $msg);
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}
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function error500($title, $msg) {
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return error(500, "Not found", $title, $msg);
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}
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/**
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* Incomplete / invalid request
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*/
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function error400($title, $msg) {
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return error(400, "Bad request", $title, $msg);
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}
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// Process input arguments
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$host = read_var('host', $_GET, null);
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if (is_null($host))
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return error400("?/?-?/?", "Missing host name");
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else if (!is_string($host))
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return error400("?/?-?/?", "Expecting exactly 1 host name");
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else if (strlen($host) == 0)
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return error400("?/?-?/?", "Host name may not be blank");
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$plugin = read_var('plugin', $_GET, null);
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if (is_null($plugin))
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return error400($host.'/?-?/?', "Missing plugin name");
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else if (!is_string($plugin))
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return error400($host.'/?-?/?', "Plugin name must be a string");
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else if (strlen($plugin) == 0)
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return error400($host.'/?-?/?', "Plugin name may not be blank");
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$pinst = read_var('plugin_instance', $_GET, '');
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if (!is_string($pinst))
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return error400($host.'/'.$plugin.'-?/?', "Plugin instance name must be a string");
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$type = read_var('type', $_GET, '');
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if (is_null($type))
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return error400($host.'/'.$plugin.(strlen($pinst) ? '-'.$pinst : '').'/?', "Missing type name");
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else if (!is_string($type))
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return error400($host.'/'.$plugin.(strlen($pinst) ? '-'.$pinst : '').'/?', "Type name must be a string");
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else if (strlen($type) == 0)
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return error400($host.'/'.$plugin.(strlen($pinst) ? '-'.$pinst : '').'/?', "Type name may not be blank");
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$tinst = read_var('type_instance', $_GET, '');
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$graph_identifier = $host.'/'.$plugin.(strlen($pinst) ? '-'.$pinst : '').'/'.$type.(strlen($tinst) ? '-'.$tinst : '-*');
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$timespan = read_var('timespan', $_GET, $config['timespan'][0]['name']);
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$timespan_ok = false;
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foreach ($config['timespan'] as &$ts)
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if ($ts['name'] == $timespan)
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$timespan_ok = true;
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if (!$timespan_ok)
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return error400($graph_identifier, "Unknown timespan requested");
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$logscale = (boolean)read_var('logarithmic', $_GET, false);
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$tinylegend = (boolean)read_var('tinylegend', $_GET, false);
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// Check that at least 1 RRD exists for the specified request
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$all_tinst = collectd_list_tinsts($host, $plugin, $pinst, $type);
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if (count($all_tinst) == 0)
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return error404($graph_identifier, "No rrd file found for graphing");
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// Now that we are read, do the bulk work
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load_graph_definitions($logscale, $tinylegend);
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$pinst = strlen($pinst) == 0 ? null : $pinst;
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$tinst = strlen($tinst) == 0 ? null : $tinst;
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$opts = array();
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$opts['timespan'] = $timespan;
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if ($logscale)
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$opts['logarithmic'] = 1;
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if ($tinylegend)
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$opts['tinylegend'] = 1;
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$rrd_cmd = false;
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if (isset($MetaGraphDefs[$type])) {
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$identifiers = array();
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foreach ($all_tinst as &$atinst)
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$identifiers[] = collectd_identifier($host, $plugin, is_null($pinst) ? '' : $pinst, $type, $atinst);
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collectd_flush($identifiers);
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$rrd_cmd = $MetaGraphDefs[$type]($host, $plugin, $pinst, $type, $all_tinst, $opts);
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} else {
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if (!in_array(is_null($tinst) ? '' : $tinst, $all_tinst))
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return error404($host.'/'.$plugin.(!is_null($pinst) ? '-'.$pinst : '').'/'.$type.(!is_null($tinst) ? '-'.$tinst : ''), "No rrd file found for graphing");
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collectd_flush(collectd_identifier($host, $plugin, is_null($pinst) ? '' : $pinst, $type, is_null($tinst) ? '' : $tinst));
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if (isset($GraphDefs[$type]))
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$rrd_cmd = collectd_draw_generic($timespan, $host, $plugin, $pinst, $type, $tinst);
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else
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$rrd_cmd = collectd_draw_rrd($host, $plugin, $pinst, $type, $tinst);
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}
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if (isset($_GET['debug'])) {
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header('Content-Type: text/plain; charset=utf-8');
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printf("Would have executed:\n%s\n", $rrd_cmd);
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return 0;
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} else if ($rrd_cmd) {
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header('Content-Type: image/png');
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header('Cache-Control: max-age=60');
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$rt = 0;
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passthru($rrd_cmd, $rt);
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# echo("$rrd_cmd");
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if ($rt != 0)
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return error500($graph_identifier, "RRD failed to generate the graph: ".$rt);
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return $rt;
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} else {
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return error500($graph_identifier, "Failed to tell RRD how to generate the graph");
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}
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?>
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