yii2源码学习笔记(十）
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继续了解Application.
1 /** 2 * Registers the errorHandler component as a php error handler. 3 * 注册errorHandler组件作为PHP错误处理函数 4 * @param array $config application config 应用程序配置 5 */ 6 protected function registerErrorHandler(&$config) 7 { 8 if (YII_ENABLE_ERROR_HANDLER) {// YII_ENABLE_ERROR_HANDLER在BaseYii中被定义为true 9 if (!isset($config[‘components‘][‘errorHandler‘][‘class‘])) { 10 //$config[‘components‘][‘errorHandler‘][‘class‘]不存在结束运行 11 echo "Error: no errorHandler component is configured.\n"; 12 exit(1); 13 } 14 //将$config[‘components‘][‘errorHandler‘]的内容设置到了$this->_definitions[‘errorHandler‘]中 15 $this->set(‘errorHandler‘, $config[‘components‘][‘errorHandler‘]); 16 unset($config[‘components‘][‘errorHandler‘]);// 删除掉配置内容 17 $this->getErrorHandler()->register(); 18 } 19 } 20 21 /** 22 * Returns an ID that uniquely identifies this module among all modules within the current application. 23 * Since this is an application instance, it will always return an empty string. 24 * 返回在当前应用程序中该模块的唯一标识。这是一个应用实例，它将返回一个空字符串。 25 * @return string the unique ID of the module.模块的唯一标识。 26 */ 27 public function getUniqueId() 28 { 29 return ‘‘; 30 } 31 32 /** 33 * Sets the root directory of the application and the @app alias.设置应用程序的根目录 @ 加应用程序别名。 34 * This method can only be invoked at the beginning of the constructor.只能在构造函数开始时调用该方法 35 * @param string $path the root directory of the application.应用程序的根目录。 36 * @property string the root directory of the application. 应用程序的根目录。 37 * @throws InvalidParamException if the directory does not exist. 如果目录不存在。抛出异常 38 */ 39 public function setBasePath($path) 40 { 41 parent::setBasePath($path); 42 // 使用@app来记录basePath 43 Yii::setAlias(‘@app‘, $this->getBasePath()); 44 } 45 46 /** 47 * Runs the application. 运行应用程序。 48 * This is the main entrance of an application. 应用程序的主要入口。 49 * @return integer the exit status (0 means normal, non-zero values mean abnormal) 状态（0正常，非0为不正常） 50 */ 51 public function run() 52 { 53 try { 54 55 $this->state = self::STATE_BEFORE_REQUEST; 56 $this->trigger(self::EVENT_BEFORE_REQUEST);//加载事件函数beforRequest函数 57 58 $this->state = self::STATE_HANDLING_REQUEST; 59 $response = $this->handleRequest($this->getRequest());//加载控制器 获取Request对象 60 61 $this->state = self::STATE_AFTER_REQUEST; 62 $this->trigger(self::EVENT_AFTER_REQUEST);//加载afterRequest事件函数 63 64 $this->state = self::STATE_SENDING_RESPONSE; 65 $response->send();//将页面内容输入缓冲，然后输出 66 67 $this->state = self::STATE_END; 68 69 return $response->exitStatus; 70 71 } catch (ExitException $e) { 72 73 $this->end($e->statusCode, isset($response) ? $response : null); 74 return $e->statusCode; 75 76 } 77 } 78 79 /** 80 * Handles the specified request. 81 * 处理指定的请求 82 * This method should return an instance of [[Response]] or its child class 83 * which represents the handling result of the request. 84 * 该方法应该返回一个[[Response]]实例，或者它的子类代表处理请求的结果 85 * @param Request $request the request to be handled 被处理的请求 86 * @return Response the resulting response 得到的响应 87 */ 88 abstract public function handleRequest($request); 89 90 private $_runtimePath; 91 92 /** 93 * Returns the directory that stores runtime files.返回存储运行时文件的路径 94 * @return string the directory that stores runtime files.存储运行时文件的目录。 95 * Defaults to the "runtime" subdirectory under [[basePath]].默认返回[[basePath]]下的 "runtime"目录 96 */ 97 public function getRuntimePath() 98 { 99 if ($this->_runtimePath === null) {//设置临时文件存储路径 100 $this->setRuntimePath($this->getBasePath() . DIRECTORY_SEPARATOR . ‘runtime‘); 101 } 102 103 return $this->_runtimePath; 104 } 105 106 /** 107 * Sets the directory that stores runtime files.设置存储运行时文件的路径 108 * @param string $path the directory that stores runtime files.存储运行时文件的目录。 109 */ 110 public function setRuntimePath($path) 111 { 112 // 获取runtimePath的路径，并存到_runtimePath中 113 $this->_runtimePath = Yii::getAlias($path); 114 // 使用@runtime来记录 runtimePath 115 Yii::setAlias(‘@runtime‘, $this->_runtimePath); 116 } 117 118 private $_vendorPath; 119 120 /** 121 * Returns the directory that stores vendor files.返回插件文件的目录。 122 * @return string the directory that stores vendor files. 123 * Defaults to "vendor" directory under [[basePath]]. 124 * 默认返回[[basePath]]下的 "vendor" 目录 125 */ 126 public function getVendorPath() 127 { 128 if ($this->_vendorPath === null) { 129 // 不存在，就将其设置为basePath/vendor 130 $this->setVendorPath($this->getBasePath() . DIRECTORY_SEPARATOR . ‘vendor‘); 131 } 132 133 return $this->_vendorPath; 134 } 135 136 /** 137 * Sets the directory that stores vendor files.设置插件目录路径，并设置别名 138 * @param string $path the directory that stores vendor files. 139 */ 140 public function setVendorPath($path) 141 { 142 $this->_vendorPath = Yii::getAlias($path);// 获取vendor的路径，并存到_vendorPath中 143 Yii::setAlias(‘@vendor‘, $this->_vendorPath);// 设置@vendor的alias 144 Yii::setAlias(‘@bower‘, $this->_vendorPath . DIRECTORY_SEPARATOR . ‘bower‘); 145 Yii::setAlias(‘@npm‘, $this->_vendorPath . DIRECTORY_SEPARATOR . ‘npm‘); 146 } 147 148 /** 149 * Returns the time zone used by this application.取得时区 150 * This is a simple wrapper of PHP function date_default_timezone_get(). 151 * If time zone is not configured in php.ini or application config, 152 * it will be set to UTC by default. 153 * @return string the time zone used by this application. 154 * @see http://php.net/manual/en/function.date-default-timezone-get.php 155 */ 156 public function getTimeZone() 157 { 158 return date_default_timezone_get(); 159 } 160 161 /** 162 * Sets the time zone used by this application.设置时区 163 * This is a simple wrapper of PHP function date_default_timezone_set(). 164 * Refer to the [php manual](http://www.php.net/manual/en/timezones.php) for available timezones. 165 * @param string $value the time zone used by this application. 166 * @see http://php.net/manual/en/function.date-default-timezone-set.php 167 */ 168 public function setTimeZone($value) 169 { 170 date_default_timezone_set($value); 171 } 172 173 /** 174 * Returns the database connection component.返回数据库连接组件 175 * @return \yii\db\Connection the database connection. 176 */ 177 public function getDb() 178 { 179 return $this->get(‘db‘); 180 } 181 182 /** 183 * Returns the log dispatcher component.返回日志调度组件 184 * @return \yii\log\Dispatcher the log dispatcher application component. 185 */ 186 public function getLog() 187 { 188 return $this->get(‘log‘); 189 } 190 191 /** 192 * Returns the error handler component.返回错误处理组件 193 * @return \yii\web\ErrorHandler|\yii\console\ErrorHandler the error handler application component. 194 */ 195 public function getErrorHandler() 196 { 197 return $this->get(‘errorHandler‘); 198 } 199 200 /** 201 * Returns the cache component.返回缓存组件 202 * @return \yii\caching\Cache the cache application component. Null if the component is not enabled. 203 */ 204 public function getCache() 205 { 206 return $this->get(‘cache‘, false); 207 } 208 209 /** 210 * Returns the formatter component.返回格式化程序组件 211 * @return \yii\i18n\Formatter the formatter application component. 212 */ 213 public function getFormatter() 214 { 215 return $this->get(‘formatter‘); 216 } 217 218 /** 219 * Returns the request component.返回请求的组件对象 220 * @return \yii\web\Request|\yii\console\Request the request component. 221 */ 222 public function getRequest() 223 { 224 return $this->get(‘request‘); 225 } 226 227 /** 228 * Returns the response component.返回响应组件 229 * @return \yii\web\Response|\yii\console\Response the response component. 230 */ 231 public function getResponse() 232 { 233 return $this->get(‘response‘); 234 } 235 236 /** 237 * Returns the view object.返回视图对象 238 * @return View|\yii\web\View the view application component that is used to render various view files. 239 */ 240 public function getView() 241 { 242 return $this->get(‘view‘); 243 } 244 245 /** 246 * Returns the URL manager for this application.返回当前应用的URL管理组件 247 * @return \yii\web\UrlManager the URL manager for this application. 248 */ 249 public function getUrlManager() 250 { 251 return $this->get(‘urlManager‘); 252 } 253 254 /** 255 * Returns the internationalization (i18n) component返回国际化组件 256 * @return \yii\i18n\I18N the internationalization application component. 257 */ 258 public function getI18n() 259 { 260 return $this->get(‘i18n‘); 261 } 262 263 /** 264 * Returns the mailer component.返回邮件组件 265 * @return \yii\mail\MailerInterface the mailer application component. 266 */ 267 public function getMailer() 268 { 269 return $this->get(‘mailer‘); 270 } 271 272 /** 273 * Returns the auth manager for this application.返回该应用的权限管理组件 274 * @return \yii\rbac\ManagerInterface the auth manager application component. 275 * Null is returned if auth manager is not configured. 管理权限没有配置返回null 276 */ 277 public function getAuthManager() 278 { 279 return $this->get(‘authManager‘, false); 280 } 281 282 /** 283 * Returns the asset manager.返回资源管理组件 284 * @return \yii\web\AssetManager the asset manager application component. 285 */ 286 public function getAssetManager() 287 { 288 return $this->get(‘assetManager‘); 289 } 290 291 /** 292 * Returns the security component.返回安全组件 293 * @return \yii\base\Security the security application component. 294 */ 295 public function getSecurity() 296 { 297 return $this->get(‘security‘); 298 } 299 300 /** 301 * Returns the configuration of core application components.返回核心组件的配置 302 * @see set() 303 */ 304 public function coreComponents() 305 { 306 return [ 307 ‘log‘ => [‘class‘ => ‘yii\log\Dispatcher‘], 308 ‘view‘ => [‘class‘ => ‘yii\web\View‘], 309 ‘formatter‘ => [‘class‘ => ‘yii\i18n\Formatter‘], 310 ‘i18n‘ => [‘class‘ => ‘yii\i18n\I18N‘], 311 ‘mailer‘ => [‘class‘ => ‘yii\swiftmailer\Mailer‘], 312 ‘urlManager‘ => [‘class‘ => ‘yii\web\UrlManager‘], 313 ‘assetManager‘ => [‘class‘ => ‘yii\web\AssetManager‘], 314 ‘security‘ => [‘class‘ => ‘yii\base\Security‘], 315 ]; 316 } 317 318 /** 319 * Terminates the application.终止应用程序 320 * This method replaces the `exit()` function by ensuring the application life cycle is completed 321 * before terminating the application.该方法代替`exit()` 确认一个应用的生命周期已经结束 322 * @param integer $status the exit status (value 0 means normal exit while other values mean abnormal exit). 323 * @param Response $response the response to be sent. If not set, the default application [[response]] component will be used. 324 * @throws ExitException if the application is in testing mode 325 */ 326 public function end($status = 0, $response = null) 327 { 328 if ($this->state === self::STATE_BEFORE_REQUEST || $this->state === self::STATE_HANDLING_REQUEST) { 329 //判断当前状态为请求前或者处理请求 330 $this->state = self::STATE_AFTER_REQUEST;//设置应用状态为请求完成后 331 $this->trigger(self::EVENT_AFTER_REQUEST); 332 } 333 334 if ($this->state !== self::STATE_SENDING_RESPONSE && $this->state !== self::STATE_END) { 335 //如果应用状态不是发送应答和应用结束 336 $this->state = self::STATE_END;//设置状态为应用结束 337 $response = $response ? : $this->getResponse(); 338 $response->send();//向客户端发送应答 339 } 340 341 if (YII_ENV_TEST) { 342 throw new ExitException($status); 343 } else { 344 exit($status); 345 } 346 }
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