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<?php |
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/** |
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* GraylogController.php |
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* |
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* -Description- |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <https://www.gnu.org/licenses/>. |
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* |
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* @link https://www.librenms.org |
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* |
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* @copyright 2018 Tony Murray |
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* @author Tony Murray <[email protected]> |
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*/ |
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namespace App\Http\Controllers\Table; |
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use App\ApiClients\GraylogApi; |
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use App\Models\Device; |
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use DateInterval; |
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use DateTime; |
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use DateTimeZone; |
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use Illuminate\Http\Request; |
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use LibreNMS\Config; |
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use LibreNMS\Util\Url; |
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class GraylogController extends SimpleTableController |
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{ |
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private $timezone; |
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private $deviceCache = []; |
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public function __construct() |
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{ |
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$timezone = Config::get('graylog.timezone'); |
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$this->timezone = $timezone ? new DateTimeZone($timezone) : null; |
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} |
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public function __invoke(Request $request, GraylogApi $api) |
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{ |
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if (! $api->isConfigured()) { |
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return response()->json([ |
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'error' => 'Graylog is not configured', |
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], 503); |
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} |
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$this->validate($request, [ |
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'stream' => 'nullable|alpha_num', |
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'device' => 'nullable|int', |
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'range' => 'nullable|int', |
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'loglevel' => 'nullable|int|min:0|max:7', |
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]); |
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$search = $request->get('searchPhrase'); |
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$device_id = $request->get('device'); |
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$device = $device_id ? Device::find($device_id) : null; |
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$range = $request->get('range', 0); |
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$limit = $request->get('rowCount', 10); |
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$page = $request->get('current', 1); |
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$offset = ($page - 1) * $limit; |
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$loglevel = $request->get('loglevel') ?? Config::get('graylog.loglevel'); |
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$query = $api->buildSimpleQuery($search, $device) . |
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($loglevel !== null ? ' AND level: <=' . $loglevel : ''); |
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$sort = null; |
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foreach ($request->get('sort', []) as $field => $direction) { |
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$sort = "$field:$direction"; |
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} |
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$stream = $request->get('stream'); |
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$filter = $stream ? "streams:$stream" : null; |
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try { |
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$data = $api->query($query, $range, $limit, $offset, $sort, $filter); |
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return $this->formatResponse( |
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array_map([$this, 'formatMessage'], $data['messages']), |
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$page, |
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count($data['messages']), |
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$data['total_results'] |
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); |
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} catch (\Exception $se) { |
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$error = $se->getMessage(); |
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} |
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return response()->json([ |
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'error' => $error, |
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], 500); |
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} |
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private function formatMessage($message) |
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{ |
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if ($this->timezone) { |
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$graylogTime = new DateTime($message['message']['timestamp']); |
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$offset = $this->timezone->getOffset($graylogTime); |
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$timeInterval = DateInterval::createFromDateString((string) $offset . 'seconds'); |
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$graylogTime->add($timeInterval); |
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$displayTime = $graylogTime->format('Y-m-d H:i:s'); |
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} else { |
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$displayTime = $message['message']['timestamp']; |
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} |
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$device = $this->deviceFromSource($message['message']['source']); |
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$level = $message['message']['level'] ?? ''; |
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$facility = $message['message']['facility'] ?? ''; |
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return [ |
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'severity' => $this->severityLabel($level), |
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'timestamp' => $displayTime, |
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'source' => $device ? Url::deviceLink($device) : $message['message']['source'], |
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'message' => $message['message']['message'] ?? '', |
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'facility' => is_numeric($facility) ? "($facility) " . __("syslog.facility.$facility") : $facility, |
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'level' => (is_numeric($level) && $level >= 0) ? "($level) " . __("syslog.severity.$level") : $level, |
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]; |
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} |
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private function severityLabel($severity) |
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{ |
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$map = [ |
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'0' => 'label-danger', |
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'1' => 'label-danger', |
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'2' => 'label-danger', |
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'3' => 'label-danger', |
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'4' => 'label-warning', |
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'5' => 'label-info', |
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'6' => 'label-info', |
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'7' => 'label-default', |
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'' => 'label-info', |
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]; |
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$barColor = isset($map[$severity]) ? $map[$severity] : 'label-info'; |
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return '<span class="alert-status ' . $barColor . '" style="margin-right:8px;float:left;"></span>'; |
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} |
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/** |
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* Cache device lookups so we don't lookup for every entry |
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* |
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* @param mixed $source |
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* @return mixed |
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*/ |
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private function deviceFromSource($source) |
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{ |
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if (! isset($this->deviceCache[$source])) { |
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$this->deviceCache[$source] = Device::findByIp($source) ?: Device::findByHostname($source); |
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} |
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return $this->deviceCache[$source]; |
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} |
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} |
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