mirror of
https://github.com/librenms/librenms.git
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269 lines
9.1 KiB
PHP
269 lines
9.1 KiB
PHP
<?php
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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 wadsnty 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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use LibreNMS\Config;
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require 'includes/html/collectd/config.php';
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require 'includes/html/collectd/functions.php';
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require 'includes/html/collectd/definitions.php';
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function makeTextBlock($text, $fontfile, $fontsize, $width)
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{
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// TODO: handle explicit line-break!
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$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", $lines);
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}//end makeTextBlock()
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/**
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* No RRD files found that could match request
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* @code HTTP error code
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* @code_msg Short text description of HTTP error code
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* @title Title for fake RRD graph
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* @msg Complete error message to display in place of graph content
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*/
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function error($code, $code_msg, $title, $msg)
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{
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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::get('rrd_width') + 81);
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$h = (Config::get('rrd_height') + 79);
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$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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}
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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), $c_etxt);
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if (function_exists('imagettfbbox') && is_file(Config::get('error_font'))) {
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// Detailled error message
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$errorfont = Config::get('error_font');
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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($png);
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}//end error()
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/**
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* No RRD files found that could match request
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*/
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function error404($title, $msg)
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{
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return error(404, 'Not found', $title, $msg);
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}//end error404()
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function error500($title, $msg)
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{
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return error(500, 'Not found', $title, $msg);
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}//end error500()
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/**
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* Incomplete / invalid request
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*/
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function error400($title, $msg)
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{
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return error(400, 'Bad request', $title, $msg);
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}//end error400()
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// Process input arguments
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// $host = read_var('host', $_GET, null);
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$host = $device['hostname'];
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if (is_null($host)) {
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return error400('?/?-?/?', 'Missing host name');
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} elseif (!is_string($host)) {
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return error400('?/?-?/?', 'Expecting exactly 1 host name');
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} elseif (strlen($host) == 0) {
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return error400('?/?-?/?', 'Host name may not be blank');
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}
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$plugin = read_var('c_plugin', $_GET, null);
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if (is_null($plugin)) {
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return error400($host.'/?-?/?', 'Missing plugin name');
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} elseif (!is_string($plugin)) {
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return error400($host.'/?-?/?', 'Plugin name must be a string');
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} elseif (strlen($plugin) == 0) {
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return error400($host.'/?-?/?', 'Plugin name may not be blank');
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}
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$pinst = read_var('c_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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}
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$type = read_var('c_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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} elseif (!is_string($type)) {
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return error400($host.'/'.$plugin.(strlen($pinst) ? '-'.$pinst : '').'/?', 'Type name must be a string');
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} elseif (strlen($type) == 0) {
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return error400($host.'/'.$plugin.(strlen($pinst) ? '-'.$pinst : '').'/?', 'Type name may not be blank');
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}
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$tinst = read_var('c_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', $_GET, Config::get('timespan.0.name'));
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$timespan_ok = false;
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foreach (Config::get('timespan') as &$ts) {
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if ($ts['name'] == $timespan) {
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$timespan_ok = true;
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}
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}
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if (!$timespan_ok) {
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return error400($graph_identifier, 'Unknown timespan requested');
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}
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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($graph_identifier, 'No rrd file found for graphing');
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}
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// Now that we are read, do the bulk work
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load_graph_definitions($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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$opts['logarithmic'] = 1;
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}
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if ($tinylegend) {
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$opts['tinylegend'] = 1;
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}
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$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, $type, is_null($pinst) ? '' : $pinst, $atinst);
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}
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collectd_flush($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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}
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collectd_flush(collectd_identifier($host, $plugin, $type, is_null($pinst) ? '' : $pinst, is_null($tinst) ? '' : $tinst));
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if (isset($GraphDefs[$type])) {
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$rrd_cmd = collectd_draw_generic($timespan, $host, $plugin, $type, $pinst, $tinst);
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} else {
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$rrd_cmd = collectd_draw_rrd($host, $plugin, $type, $pinst, $tinst);
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}
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}
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if (isset($rrd_cmd)) {
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$from = (int)($_GET['from'] ?? time() - 86400);
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$to = (int)($_GET['to'] ?? time());
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$rrd_cmd .= ' -s '.$from.' -e '.$to;
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}
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if ($_GET['legend'] == 'no') {
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$rrd_cmd .= ' -g ';
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}
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if ($height < '99') {
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$rrd_cmd .= ' --only-graph ';
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}
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if ($width <= '300') {
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$rrd_cmd .= ' --font LEGEND:7:' . Config::get('mono_font') . ' --font AXIS:6:' . Config::get('mono_font') . ' ';
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} else {
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$rrd_cmd .= ' --font LEGEND:8:' . Config::get('mono_font') . ' --font AXIS:7:' . Config::get('mono_font') . ' ';
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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", $rrd_cmd);
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return 0;
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} elseif ($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, $rt);
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if ($rt !== 0) {
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return error500($graph_identifier, 'RRD failed to generate the graph: '.$rt);
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}
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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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