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vendor/yiisoft/yii2/web/Application.php

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+<?php
+/**
+ * @link http://www.yiiframework.com/
+ * @copyright Copyright (c) 2008 Yii Software LLC
+ * @license http://www.yiiframework.com/license/
+ */
+
+namespace yii\web;
+
+use Yii;
+use yii\base\InvalidRouteException;
+use yii\helpers\Url;
+
+/**
+ * Application is the base class for all web application classes.
+ *
+ * For more details and usage information on Application, see the [guide article on applications](guide:structure-applications).
+ *
+ * @property ErrorHandler $errorHandler The error handler application component. This property is read-only.
+ * @property string $homeUrl The homepage URL.
+ * @property Request $request The request component. This property is read-only.
+ * @property Response $response The response component. This property is read-only.
+ * @property Session $session The session component. This property is read-only.
+ * @property User $user The user component. This property is read-only.
+ *
+ * @author Qiang Xue <qiang.xue@gmail.com>
+ * @since 2.0
+ */
+class Application extends \yii\base\Application
+{
+    /**
+     * @var string the default route of this application. Defaults to 'site'.
+     */
+    public $defaultRoute = 'site';
+    /**
+     * @var array the configuration specifying a controller action which should handle
+     * all user requests. This is mainly used when the application is in maintenance mode
+     * and needs to handle all incoming requests via a single action.
+     * The configuration is an array whose first element specifies the route of the action.
+     * The rest of the array elements (key-value pairs) specify the parameters to be bound
+     * to the action. For example,
+     *
+     * ```php
+     * [
+     *     'offline/notice',
+     *     'param1' => 'value1',
+     *     'param2' => 'value2',
+     * ]
+     * ```
+     *
+     * Defaults to null, meaning catch-all is not used.
+     */
+    public $catchAll;
+    /**
+     * @var Controller the currently active controller instance
+     */
+    public $controller;
+
+
+    /**
+     * {@inheritdoc}
+     */
+    protected function bootstrap()
+    {
+        $request = $this->getRequest();
+        Yii::setAlias('@webroot', dirname($request->getScriptFile()));
+        Yii::setAlias('@web', $request->getBaseUrl());
+
+        parent::bootstrap();
+    }
+
+    /**
+     * Handles the specified request.
+     * @param Request $request the request to be handled
+     * @return Response the resulting response
+     * @throws NotFoundHttpException if the requested route is invalid
+     */
+    public function handleRequest($request)
+    {
+        if (empty($this->catchAll)) {
+            try {
+                list($route, $params) = $request->resolve();
+            } catch (UrlNormalizerRedirectException $e) {
+                $url = $e->url;
+                if (is_array($url)) {
+                    if (isset($url[0])) {
+                        // ensure the route is absolute
+                        $url[0] = '/' . ltrim($url[0], '/');
+                    }
+                    $url += $request->getQueryParams();
+                }
+
+                return $this->getResponse()->redirect(Url::to($url, $e->scheme), $e->statusCode);
+            }
+        } else {
+            $route = $this->catchAll[0];
+            $params = $this->catchAll;
+            unset($params[0]);
+        }
+        try {
+            Yii::debug("Route requested: '$route'", __METHOD__);
+            $this->requestedRoute = $route;
+            $result = $this->runAction($route, $params);
+            if ($result instanceof Response) {
+                return $result;
+            }
+
+            $response = $this->getResponse();
+            if ($result !== null) {
+                $response->data = $result;
+            }
+
+            return $response;
+        } catch (InvalidRouteException $e) {
+            throw new NotFoundHttpException(Yii::t('yii', 'Page not found.'), $e->getCode(), $e);
+        }
+    }
+
+    private $_homeUrl;
+
+    /**
+     * @return string the homepage URL
+     */
+    public function getHomeUrl()
+    {
+        if ($this->_homeUrl === null) {
+            if ($this->getUrlManager()->showScriptName) {
+                return $this->getRequest()->getScriptUrl();
+            }
+
+            return $this->getRequest()->getBaseUrl() . '/';
+        }
+
+        return $this->_homeUrl;
+    }
+
+    /**
+     * @param string $value the homepage URL
+     */
+    public function setHomeUrl($value)
+    {
+        $this->_homeUrl = $value;
+    }
+
+    /**
+     * Returns the error handler component.
+     * @return ErrorHandler the error handler application component.
+     */
+    public function getErrorHandler()
+    {
+        return $this->get('errorHandler');
+    }
+
+    /**
+     * Returns the request component.
+     * @return Request the request component.
+     */
+    public function getRequest()
+    {
+        return $this->get('request');
+    }
+
+    /**
+     * Returns the response component.
+     * @return Response the response component.
+     */
+    public function getResponse()
+    {
+        return $this->get('response');
+    }
+
+    /**
+     * Returns the session component.
+     * @return Session the session component.
+     */
+    public function getSession()
+    {
+        return $this->get('session');
+    }
+
+    /**
+     * Returns the user component.
+     * @return User the user component.
+     */
+    public function getUser()
+    {
+        return $this->get('user');
+    }
+
+    /**
+     * {@inheritdoc}
+     */
+    public function coreComponents()
+    {
+        return array_merge(parent::coreComponents(), [
+            'request' => ['class' => 'yii\web\Request'],
+            'response' => ['class' => 'yii\web\Response'],
+            'session' => ['class' => 'yii\web\Session'],
+            'user' => ['class' => 'yii\web\User'],
+            'errorHandler' => ['class' => 'yii\web\ErrorHandler'],
+        ]);
+    }
+}