diff options
Diffstat (limited to 'modules/monitoring/application/views/helpers/PluginOutput.php')
| -rw-r--r-- | modules/monitoring/application/views/helpers/PluginOutput.php | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/modules/monitoring/application/views/helpers/PluginOutput.php b/modules/monitoring/application/views/helpers/PluginOutput.php new file mode 100644 index 0000000..bcd3d9e --- /dev/null +++ b/modules/monitoring/application/views/helpers/PluginOutput.php @@ -0,0 +1,199 @@ +<?php +/* Icinga Web 2 | (c) 2013 Icinga Development Team | GPLv2+ */ + +use Icinga\Web\Dom\DomNodeIterator; +use Icinga\Web\View; +use Icinga\Web\Helper\HtmlPurifier; + +/** + * Plugin output renderer + */ +class Zend_View_Helper_PluginOutput extends Zend_View_Helper_Abstract +{ + /** + * Patterns to be replaced in plain text plugin output + * + * @var array + */ + protected static $txtPatterns = array( + '~\\\t~', + '~\\\n~', + '~(\[|\()OK(\]|\))~', + '~(\[|\()WARNING(\]|\))~', + '~(\[|\()CRITICAL(\]|\))~', + '~(\[|\()UNKNOWN(\]|\))~', + '~(\[|\()UP(\]|\))~', + '~(\[|\()DOWN(\]|\))~', + '~\@{6,}~' + ); + + /** + * Replacements for $txtPatterns + * + * @var array + */ + protected static $txtReplacements = array( + "\t", + "\n", + '<span class="state-ok">$1OK$2</span>', + '<span class="state-warning">$1WARNING$2</span>', + '<span class="state-critical">$1CRITICAL$2</span>', + '<span class="state-unknown">$1UNKNOWN$2</span>', + '<span class="state-up">$1UP$2</span>', + '<span class="state-down">$1DOWN$2</span>', + '@@@@@@', + ); + + /** + * Patterns to be replaced in html plugin output + * + * @var array + */ + protected static $htmlPatterns = array( + '~\\\t~', + '~\\\n~', + '~<table~' + ); + + /** + * Replacements for $htmlPatterns + * + * @var array + */ + protected static $htmlReplacements = array( + "\t", + "\n", + '<table style="font-size: 0.75em"' + ); + + /** @var \Icinga\Module\Monitoring\Web\Helper\PluginOutputHookRenderer */ + protected $hookRenderer; + + public function __construct() + { + $this->hookRenderer = (new \Icinga\Module\Monitoring\Web\Helper\PluginOutputHookRenderer())->registerHooks(); + } + + /** + * Render plugin output + * + * @param string $output + * @param bool $raw + * @param string $command Check command + * + * @return string + */ + public function pluginOutput($output, $raw = false, $command = null) + { + if (empty($output)) { + return ''; + } + + if ($command !== null) { + $output = $this->hookRenderer->render($command, $output, ! $raw); + } + + if (preg_match('~<\w+(?>\s\w+=[^>]*)?>~', $output)) { + // HTML + $output = HtmlPurifier::process(preg_replace( + self::$htmlPatterns, + self::$htmlReplacements, + $output + )); + $isHtml = true; + } else { + // Plaintext + $output = preg_replace( + self::$txtPatterns, + self::$txtReplacements, + // Not using the view here to escape this. The view sets `double_encode` to true + htmlspecialchars($output, ENT_COMPAT | ENT_SUBSTITUTE | ENT_HTML5, View::CHARSET, false) + ); + $isHtml = false; + } + + $output = trim($output); + // Add zero-width space after commas which are not followed by a whitespace character + // in oder to help browsers to break words in plugin output + $output = preg_replace('/,(?=[^\s])/', ',​', $output); + if (! $raw) { + if ($isHtml) { + $output = $this->processHtml($output); + $output = '<div class="plugin-output">' . $output . '</div>'; + } else { + $output = '<div class="plugin-output preformatted">' . $output . '</div>'; + } + } + + return $output; + } + + /** + * Replace classic Icinga CGI links with Icinga Web 2 links and color state information, if any + * + * @param string $html + * + * @return string + */ + protected function processHtml($html) + { + $pattern = '/[([](OK|WARNING|CRITICAL|UNKNOWN|UP|DOWN)[)\]]/'; + $doc = new DOMDocument(); + $doc->loadXML('<div>' . $html . '</div>', LIBXML_NOERROR | LIBXML_NOWARNING); + $dom = new RecursiveIteratorIterator(new DomNodeIterator($doc), RecursiveIteratorIterator::SELF_FIRST); + $nodesToRemove = array(); + foreach ($dom as $node) { + /** @var \DOMNode $node */ + if ($node->nodeType === XML_TEXT_NODE) { + $start = 0; + while (preg_match($pattern, $node->nodeValue, $match, PREG_OFFSET_CAPTURE, $start)) { + $offsetLeft = $match[0][1]; + $matchLength = strlen($match[0][0]); + $leftLength = $offsetLeft - $start; + // if there is text before the match + if ($leftLength) { + // create node for leading text + $text = new DOMText(substr($node->nodeValue, $start, $leftLength)); + $node->parentNode->insertBefore($text, $node); + } + // create the new element for the match + $span = $doc->createElement('span', $match[0][0]); + $span->setAttribute('class', 'state-' . strtolower($match[1][0])); + $node->parentNode->insertBefore($span, $node); + + // start for next match + $start = $offsetLeft + $matchLength; + } + if ($start) { + // is there text left? + if (strlen($node->nodeValue) > $start) { + // create node for trailing text + $text = new DOMText(substr($node->nodeValue, $start)); + $node->parentNode->insertBefore($text, $node); + } + // delete the old node later + $nodesToRemove[] = $node; + } + } elseif ($node->nodeType === XML_ELEMENT_NODE) { + /** @var \DOMElement $node */ + if ($node->tagName === 'a' + && preg_match('~^/cgi\-bin/status\.cgi\?(.+)$~', $node->getAttribute('href'), $match) + ) { + parse_str($match[1], $params); + if (isset($params['host'])) { + $node->setAttribute( + 'href', + $this->view->baseUrl('/monitoring/host/show?host=' . urlencode($params['host'])) + ); + } + } + } + } + foreach ($nodesToRemove as $node) { + /** @var \DOMNode $node */ + $node->parentNode->removeChild($node); + } + + return substr($doc->saveHTML(), 5, -7); + } +} |