Module.php

<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\debug;

use Yii;
use yii\base\Application;
use yii\base\BootstrapInterface;
use yii\helpers\Url;
use yii\web\View;
use yii\web\ForbiddenHttpException;

/**
 * The Yii Debug Module provides the debug toolbar and debugger
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
class Module extends \yii\base\Module implements BootstrapInterface
{
    /**
     * @var array the list of IPs that are allowed to access this module.
     * Each array element represents a single IP filter which can be either an IP address
     * or an address with wildcard (e.g. 192.168.0.*) to represent a network segment.
     * The default value is `['127.0.0.1', '::1']`, which means the module can only be accessed
     * by localhost.
     */
    public $allowedIPs = ['127.0.0.1', '::1'];
    /**
     * @inheritdoc
     */
    public $controllerNamespace = 'yii\debug\controllers';
    /**
     * @var LogTarget
     */
    public $logTarget;
    /**
     * @var array list of debug panels. The array keys are the panel IDs, and values are the corresponding
     * panel class names or configuration arrays. This will be merged with [[corePanels()]].
     * You may reconfigure a core panel via this property by using the same panel ID.
     * You may also disable a core panel by setting it to be false in this property.
     */
    public $panels = [];
    /**
     * @var string the directory storing the debugger data files. This can be specified using a path alias.
     */
    public $dataPath = '@runtime/debug';
    /**
     * @var integer the maximum number of debug data files to keep. If there are more files generated,
     * the oldest ones will be removed.
     */
    public $historySize = 50;
    /**
     * @var boolean whether to enable message logging for the requests about debug module actions.
     * You normally do not want to keep these logs because they may distract you from the logs about your applications.
     * You may want to enable the debug logs if you want to investigate how the debug module itself works.
     */
    public $enableDebugLogs = false;


    /**
     * Returns Yii logo ready to use in `<img src="`
     *
     * @return string base64 representation of the image
     */
    public static function getYiiLogo()
    {
        return 'data:image/png;base64,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    }

    /**
     * @inheritdoc
     */
    public function init()
    {
        parent::init();
        $this->dataPath = Yii::getAlias($this->dataPath);
        $this->initPanels();
    }

    /**
     * Initializes panels.
     */
    protected function initPanels()
    {
        // merge custom panels and core panels so that they are ordered mainly by custom panels
        if (empty($this->panels)) {
            $this->panels = $this->corePanels();
        } else {
            $corePanels = $this->corePanels();
            foreach ($corePanels as $id => $config) {
                if (isset($this->panels[$id])) {
                    unset($corePanels[$id]);
                }
            }
            $this->panels = array_filter(array_merge($corePanels, $this->panels));
        }

        foreach ($this->panels as $id => $config) {
            $config['module'] = $this;
            $config['id'] = $id;
            $this->panels[$id] = Yii::createObject($config);
        }
    }

    /**
     * @inheritdoc
     */
    public function bootstrap($app)
    {
        $this->logTarget = Yii::$app->getLog()->targets['debug'] = new LogTarget($this);

        // delay attaching event handler to the view component after it is fully configured
        $app->on(Application::EVENT_BEFORE_REQUEST, function () use ($app) {
            $app->getView()->on(View::EVENT_END_BODY, [$this, 'renderToolbar']);
        });

        $app->getUrlManager()->addRules([
            $this->id => $this->id,
            $this->id . '/<controller:\w+>/<action:\w+>' => $this->id . '/<controller>/<action>',
        ], false);
    }

    /**
     * @inheritdoc
     */
    public function beforeAction($action)
    {
        if (!$this->enableDebugLogs) {
            foreach (Yii::$app->getLog()->targets as $target) {
                $target->enabled = false;
            }
        }

        if (!parent::beforeAction($action)) {
            return false;
        }

        // do not display debug toolbar when in debug view mode
        Yii::$app->getView()->off(View::EVENT_END_BODY, [$this, 'renderToolbar']);

        if ($this->checkAccess()) {
            $this->resetGlobalSettings();
            return true;
        } elseif ($action->id === 'toolbar') {
            // Accessing toolbar remotely is normal. Do not throw exception.
            return false;
        } else {
            throw new ForbiddenHttpException('You are not allowed to access this page.');
        }
    }

    /**
     * Resets potentially incompatible global settings done in app config.
     */
    protected function resetGlobalSettings()
    {
        Yii::$app->assetManager->bundles = [];
    }

    /**
     * Renders mini-toolbar at the end of page body.
     *
     * @param \yii\base\Event $event
     */
    public function renderToolbar($event)
    {
        if (!$this->checkAccess() || Yii::$app->getRequest()->getIsAjax()) {
            return;
        }
        $url = Url::toRoute(['/' . $this->id . '/default/toolbar',
            'tag' => $this->logTarget->tag,
        ]);
        echo '<div id="yii-debug-toolbar" data-url="' . $url . '" style="display:none"></div>';
        /* @var $view View */
        $view = $event->sender;
        echo '<style>' . $view->renderPhpFile(__DIR__ . '/assets/toolbar.css') . '</style>';
        echo '<script>' . $view->renderPhpFile(__DIR__ . '/assets/toolbar.js') . '</script>';
    }

    /**
     * Checks if current user is allowed to access the module
     * @return boolean if access is granted
     */
    protected function checkAccess()
    {
        $ip = Yii::$app->getRequest()->getUserIP();
        foreach ($this->allowedIPs as $filter) {
            if ($filter === '*' || $filter === $ip || (($pos = strpos($filter, '*')) !== false && !strncmp($ip, $filter, $pos))) {
                return true;
            }
        }
        Yii::warning('Access to debugger is denied due to IP address restriction. The requested IP is ' . $ip, __METHOD__);

        return false;
    }

    /**
     * @return array default set of panels
     */
    protected function corePanels()
    {
        return [
            'config' => ['class' => 'yii\debug\panels\ConfigPanel'],
            'request' => ['class' => 'yii\debug\panels\RequestPanel'],
            'log' => ['class' => 'yii\debug\panels\LogPanel'],
            'profiling' => ['class' => 'yii\debug\panels\ProfilingPanel'],
            'db' => ['class' => 'yii\debug\panels\DbPanel'],
            'mail' => ['class' => 'yii\debug\panels\MailPanel'],
        ];
    }
}