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<?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 class="output-table"'
);
/** @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);
}
}
|
