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