Application.php 18.8 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649
<?php
/**
 * @link http://www.yiiframework.com/
 * @copyright Copyright (c) 2008 Yii Software LLC
 * @license http://www.yiiframework.com/license/
 */

namespace yii\base;

use Yii;
use yii\helpers\Console;
use yii\web\HttpException;

/**
 * Application is the base class for all application classes.
 *
 * @property \yii\rbac\Manager $authManager The auth manager for this application. This property is read-only.
 * @property string $basePath The root directory of the application.
 * @property \yii\caching\Cache $cache The cache application component. Null if the component is not enabled.
 * This property is read-only.
 * @property \yii\db\Connection $db The database connection. This property is read-only.
 * @property ErrorHandler $errorHandler The error handler application component. This property is read-only.
 * @property \yii\base\Formatter $formatter The formatter application component. This property is read-only.
 * @property \yii\i18n\I18N $i18n The internationalization component. This property is read-only.
 * @property \yii\log\Logger $log The log component. This property is read-only.
 * @property \yii\mail\MailerInterface $mail The mailer interface. This property is read-only.
 * @property \yii\web\Request|\yii\console\Request $request The request component. This property is read-only.
 * @property string $runtimePath The directory that stores runtime files. Defaults to the "runtime"
 * subdirectory under [[basePath]].
 * @property string $timeZone The time zone used by this application.
 * @property string $uniqueId The unique ID of the module. This property is read-only.
 * @property \yii\web\UrlManager $urlManager The URL manager for this application. This property is read-only.
 * @property string $vendorPath The directory that stores vendor files. Defaults to "vendor" directory under
 * [[basePath]].
 * @property View|\yii\web\View $view The view object that is used to render various view files. This property
 * is read-only.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @since 2.0
 */
abstract class Application extends Module
{
	/**
	 * @event Event an event raised before the application starts to handle a request.
	 */
	const EVENT_BEFORE_REQUEST = 'beforeRequest';
	/**
	 * @event Event an event raised after the application successfully handles a request (before the response is sent out).
	 */
	const EVENT_AFTER_REQUEST = 'afterRequest';
	/**
	 * @event ActionEvent an event raised before executing a controller action.
	 * You may set [[ActionEvent::isValid]] to be false to cancel the action execution.
	 */
	const EVENT_BEFORE_ACTION = 'beforeAction';
	/**
	 * @event ActionEvent an event raised after executing a controller action.
	 */
	const EVENT_AFTER_ACTION = 'afterAction';

	/**
	 * @var string the namespace that controller classes are in. If not set,
	 * it will use the "app\controllers" namespace.
	 */
	public $controllerNamespace = 'app\\controllers';

	/**
	 * @var string the application name.
	 */
	public $name = 'My Application';
	/**
	 * @var string the version of this application.
	 */
	public $version = '1.0';
	/**
	 * @var string the charset currently used for the application.
	 */
	public $charset = 'UTF-8';
	/**
	 * @var string the language that is meant to be used for end users.
	 * @see sourceLanguage
	 */
	public $language = 'en';
	/**
	 * @var string the language that the application is written in. This mainly refers to
	 * the language that the messages and view files are written in.
	 * @see language
	 */
	public $sourceLanguage = 'en';
	/**
	 * @var Controller the currently active controller instance
	 */
	public $controller;
	/**
	 * @var string|boolean the layout that should be applied for views in this application. Defaults to 'main'.
	 * If this is false, layout will be disabled.
	 */
	public $layout = 'main';
	/**
	 * @var integer the size of the reserved memory. A portion of memory is pre-allocated so that
	 * when an out-of-memory issue occurs, the error handler is able to handle the error with
	 * the help of this reserved memory. If you set this value to be 0, no memory will be reserved.
	 * Defaults to 256KB.
	 */
	public $memoryReserveSize = 262144;
	/**
	 * @var string the requested route
	 */
	public $requestedRoute;
	/**
	 * @var Action the requested Action. If null, it means the request cannot be resolved into an action.
	 */
	public $requestedAction;
	/**
	 * @var array the parameters supplied to the requested action.
	 */
	public $requestedParams;
	/**
	 * @var array list of installed Yii extensions. Each array element represents a single extension
	 * with the following structure:
	 *
	 * ~~~
	 * [
	 *     'name' => 'extension name',
	 *     'version' => 'version number',
	 *     'bootstrap' => 'BootstrapClassName',
	 * ]
	 * ~~~
	 */
	public $extensions = [];
	/**
	 * @var \Exception the exception that is being handled currently. When this is not null,
	 * it means the application is handling some exception and extra care should be taken.
	 */
	public $exception;

	/**
	 * @var string Used to reserve memory for fatal error handler.
	 */
	private $_memoryReserve;

	/**
	 * Constructor.
	 * @param array $config name-value pairs that will be used to initialize the object properties.
	 * Note that the configuration must contain both [[id]] and [[basePath]].
	 * @throws InvalidConfigException if either [[id]] or [[basePath]] configuration is missing.
	 */
	public function __construct($config = [])
	{
		Yii::$app = $this;

		$this->preInit($config);
		$this->registerErrorHandlers();
		$this->registerCoreComponents();

		Component::__construct($config);
	}

	/**
	 * Pre-initializes the application.
	 * This method is called at the beginning of the application constructor.
	 * It initializes several important application properties.
	 * If you override this method, please make sure you call the parent implementation.
	 * @param array $config the application configuration
	 * @throws InvalidConfigException if either [[id]] or [[basePath]] configuration is missing.
	 */
	public function preInit(&$config)
	{
		if (!isset($config['id'])) {
			throw new InvalidConfigException('The "id" configuration is required.');
		}
		if (isset($config['basePath'])) {
			$this->setBasePath($config['basePath']);
			unset($config['basePath']);
		} else {
			throw new InvalidConfigException('The "basePath" configuration is required.');
		}

		if (isset($config['vendorPath'])) {
			$this->setVendorPath($config['vendorPath']);
			unset($config['vendorPath']);
		} else {
			// set "@vendor"
			$this->getVendorPath();
		}
		if (isset($config['runtimePath'])) {
			$this->setRuntimePath($config['runtimePath']);
			unset($config['runtimePath']);
		} else {
			// set "@runtime"
			$this->getRuntimePath();
		}

		if (isset($config['timeZone'])) {
			$this->setTimeZone($config['timeZone']);
			unset($config['timeZone']);
		} elseif (!ini_get('date.timezone')) {
			$this->setTimeZone('UTC');
		}
	}

	/**
	 * @inheritdoc
	 */
	public function init()
	{
		$this->initExtensions($this->extensions);
		parent::init();
	}

	/**
	 * Initializes the extensions.
	 * @param array $extensions the extensions to be initialized. Please refer to [[extensions]]
	 * for the structure of the extension array.
	 */
	protected function initExtensions($extensions)
	{
		foreach ($extensions as $extension) {
			if (!empty($extension['alias'])) {
				foreach ($extension['alias'] as $name => $path) {
					Yii::setAlias($name, $path);
				}
			}
			if (isset($extension['bootstrap'])) {
				/** @var Extension $class */
				$class = $extension['bootstrap'];
				$class::init();
			}
		}
	}

	/**
	 * Loads components that are declared in [[preload]].
	 * @throws InvalidConfigException if a component or module to be preloaded is unknown
	 */
	public function preloadComponents()
	{
		$this->getComponent('log');
		parent::preloadComponents();
	}

	/**
	 * Registers error handlers.
	 */
	public function registerErrorHandlers()
	{
		if (YII_ENABLE_ERROR_HANDLER) {
			ini_set('display_errors', 0);
			set_exception_handler([$this, 'handleException']);
			set_error_handler([$this, 'handleError']);
			if ($this->memoryReserveSize > 0) {
				$this->_memoryReserve = str_repeat('x', $this->memoryReserveSize);
			}
			register_shutdown_function([$this, 'handleFatalError']);
		}
	}

	/**
	 * Returns an ID that uniquely identifies this module among all modules within the current application.
	 * Since this is an application instance, it will always return an empty string.
	 * @return string the unique ID of the module.
	 */
	public function getUniqueId()
	{
		return '';
	}

	/**
	 * Sets the root directory of the application and the @app alias.
	 * This method can only be invoked at the beginning of the constructor.
	 * @param string $path the root directory of the application.
	 * @property string the root directory of the application.
	 * @throws InvalidParamException if the directory does not exist.
	 */
	public function setBasePath($path)
	{
		parent::setBasePath($path);
		Yii::setAlias('@app', $this->getBasePath());
	}

	/**
	 * Runs the application.
	 * This is the main entrance of an application.
	 * @return integer the exit status (0 means normal, non-zero values mean abnormal)
	 */
	public function run()
	{
		$this->trigger(self::EVENT_BEFORE_REQUEST);
		$response = $this->handleRequest($this->getRequest());
		$this->trigger(self::EVENT_AFTER_REQUEST);
		$response->send();
		return $response->exitStatus;
	}

	/**
	 * Handles the specified request.
	 *
	 * This method should return an instance of [[Response]] or its child class
	 * which represents the handling result of the request.
	 *
	 * @param Request $request the request to be handled
	 * @return Response the resulting response
	 */
	abstract public function handleRequest($request);


	private $_runtimePath;

	/**
	 * Returns the directory that stores runtime files.
	 * @return string the directory that stores runtime files.
	 * Defaults to the "runtime" subdirectory under [[basePath]].
	 */
	public function getRuntimePath()
	{
		if ($this->_runtimePath === null) {
			$this->setRuntimePath($this->getBasePath() . DIRECTORY_SEPARATOR . 'runtime');
		}
		return $this->_runtimePath;
	}

	/**
	 * Sets the directory that stores runtime files.
	 * @param string $path the directory that stores runtime files.
	 */
	public function setRuntimePath($path)
	{
		$this->_runtimePath = Yii::getAlias($path);
		Yii::setAlias('@runtime', $this->_runtimePath);
	}

	private $_vendorPath;

	/**
	 * Returns the directory that stores vendor files.
	 * @return string the directory that stores vendor files.
	 * Defaults to "vendor" directory under [[basePath]].
	 */
	public function getVendorPath()
	{
		if ($this->_vendorPath === null) {
			$this->setVendorPath($this->getBasePath() . DIRECTORY_SEPARATOR . 'vendor');
		}
		return $this->_vendorPath;
	}

	/**
	 * Sets the directory that stores vendor files.
	 * @param string $path the directory that stores vendor files.
	 */
	public function setVendorPath($path)
	{
		$this->_vendorPath = Yii::getAlias($path);
		Yii::setAlias('@vendor', $this->_vendorPath);
	}

	/**
	 * Returns the time zone used by this application.
	 * This is a simple wrapper of PHP function date_default_timezone_get().
	 * If time zone is not configured in php.ini or application config,
	 * it will be set to UTC by default.
	 * @return string the time zone used by this application.
	 * @see http://php.net/manual/en/function.date-default-timezone-get.php
	 */
	public function getTimeZone()
	{
		return date_default_timezone_get();
	}

	/**
	 * Sets the time zone used by this application.
	 * This is a simple wrapper of PHP function date_default_timezone_set().
	 * Refer to the [php manual](http://www.php.net/manual/en/timezones.php) for available timezones.
	 * @param string $value the time zone used by this application.
	 * @see http://php.net/manual/en/function.date-default-timezone-set.php
	 */
	public function setTimeZone($value)
	{
		date_default_timezone_set($value);
	}

	/**
	 * Returns the database connection component.
	 * @return \yii\db\Connection the database connection
	 */
	public function getDb()
	{
		return $this->getComponent('db');
	}

	/**
	 * Returns the log component.
	 * @return \yii\log\Logger the log component
	 */
	public function getLog()
	{
		return $this->getComponent('log');
	}

	/**
	 * Returns the error handler component.
	 * @return ErrorHandler the error handler application component.
	 */
	public function getErrorHandler()
	{
		return $this->getComponent('errorHandler');
	}

	/**
	 * Returns the cache component.
	 * @return \yii\caching\Cache the cache application component. Null if the component is not enabled.
	 */
	public function getCache()
	{
		return $this->getComponent('cache');
	}

	/**
	 * Returns the formatter component.
	 * @return \yii\base\Formatter the formatter application component.
	 */
	public function getFormatter()
	{
		return $this->getComponent('formatter');
	}

	/**
	 * Returns the request component.
	 * @return \yii\web\Request|\yii\console\Request the request component
	 */
	public function getRequest()
	{
		return $this->getComponent('request');
	}

	/**
	 * Returns the view object.
	 * @return View|\yii\web\View the view object that is used to render various view files.
	 */
	public function getView()
	{
		return $this->getComponent('view');
	}

	/**
	 * Returns the URL manager for this application.
	 * @return \yii\web\UrlManager the URL manager for this application.
	 */
	public function getUrlManager()
	{
		return $this->getComponent('urlManager');
	}

	/**
	 * Returns the internationalization (i18n) component
	 * @return \yii\i18n\I18N the internationalization component
	 */
	public function getI18n()
	{
		return $this->getComponent('i18n');
	}

	/**
	 * Returns the mailer component.
	 * @return \yii\mail\MailerInterface the mailer interface
	 */
	public function getMail()
	{
		return $this->getComponent('mail');
	}

	/**
	 * Returns the auth manager for this application.
	 * @return \yii\rbac\Manager the auth manager for this application.
	 */
	public function getAuthManager()
	{
		return $this->getComponent('authManager');
	}

	/**
	 * Registers the core application components.
	 * @see setComponents
	 */
	public function registerCoreComponents()
	{
		$this->setComponents([
			'log' => ['class' => 'yii\log\Logger'],
			'errorHandler' => ['class' => 'yii\base\ErrorHandler'],
			'formatter' => ['class' => 'yii\base\Formatter'],
			'i18n' => ['class' => 'yii\i18n\I18N'],
			'mail' => ['class' => 'yii\swiftmailer\Mailer'],
			'urlManager' => ['class' => 'yii\web\UrlManager'],
			'view' => ['class' => 'yii\web\View'],
		]);
	}

	/**
	 * Handles uncaught PHP exceptions.
	 *
	 * This method is implemented as a PHP exception handler.
	 *
	 * @param \Exception $exception the exception that is not caught
	 */
	public function handleException($exception)
	{
		$this->exception = $exception;

		// disable error capturing to avoid recursive errors while handling exceptions
		restore_error_handler();
		restore_exception_handler();
		try {
			$this->logException($exception);
			if (($handler = $this->getErrorHandler()) !== null) {
				$handler->handle($exception);
			} else {
				echo $this->renderException($exception);
				if (PHP_SAPI === 'cli' && !YII_ENV_TEST) {
					exit(1);
				}
			}
		} catch (\Exception $e) {
			// exception could be thrown in ErrorHandler::handle()
			$msg = (string)$e;
			$msg .= "\nPrevious exception:\n";
			$msg .= (string)$exception;
			if (YII_DEBUG) {
				if (PHP_SAPI === 'cli') {
					echo $msg . "\n";
				} else {
					echo '<pre>' . htmlspecialchars($msg, ENT_QUOTES, $this->charset) . '</pre>';
				}
			}
			$msg .= "\n\$_SERVER = " . var_export($_SERVER, true);
			error_log($msg);
			exit(1);
		}
	}

	/**
	 * Handles PHP execution errors such as warnings, notices.
	 *
	 * This method is used as a PHP error handler. It will simply raise an `ErrorException`.
	 *
	 * @param integer $code the level of the error raised
	 * @param string $message the error message
	 * @param string $file the filename that the error was raised in
	 * @param integer $line the line number the error was raised at
	 *
	 * @throws ErrorException
	 */
	public function handleError($code, $message, $file, $line)
	{
		if (error_reporting() & $code) {
			// load ErrorException manually here because autoloading them will not work
			// when error occurs while autoloading a class
			if (!class_exists('\\yii\\base\\Exception', false)) {
				require_once(__DIR__ . '/Exception.php');
			}
			if (!class_exists('\\yii\\base\\ErrorException', false)) {
				require_once(__DIR__ . '/ErrorException.php');
			}
			$exception = new ErrorException($message, $code, $code, $file, $line);

			// in case error appeared in __toString method we can't throw any exception
			$trace = debug_backtrace(false);
			array_shift($trace);
			foreach ($trace as $frame) {
				if ($frame['function'] == '__toString') {
					$this->handleException($exception);
					exit(1);
				}
			}

			throw $exception;
		}
	}

	/**
	 * Handles fatal PHP errors
	 */
	public function handleFatalError()
	{
		unset($this->_memoryReserve);

		// load ErrorException manually here because autoloading them will not work
		// when error occurs while autoloading a class
		if (!class_exists('\\yii\\base\\Exception', false)) {
			require_once(__DIR__ . '/Exception.php');
		}
		if (!class_exists('\\yii\\base\\ErrorException', false)) {
			require_once(__DIR__ . '/ErrorException.php');
		}

		$error = error_get_last();

		if (ErrorException::isFatalError($error)) {
			$exception = new ErrorException($error['message'], $error['type'], $error['type'], $error['file'], $error['line']);
			$this->exception = $exception;
			// use error_log because it's too late to use Yii log
			error_log($exception);

			if (($handler = $this->getErrorHandler()) !== null) {
				$handler->handle($exception);
			} else {
				echo $this->renderException($exception);
			}

			exit(1);
		}
	}

	/**
	 * Renders an exception without using rich format.
	 * @param \Exception $exception the exception to be rendered.
	 * @return string the rendering result
	 */
	public function renderException($exception)
	{
		if ($exception instanceof Exception && ($exception instanceof UserException || !YII_DEBUG)) {
			$message = $exception->getName() . ': ' . $exception->getMessage();
			if (Yii::$app->controller instanceof \yii\console\Controller) {
				$message = Yii::$app->controller->ansiFormat($message, Console::FG_RED);
			}
		} else {
			$message = YII_DEBUG ? (string)$exception : 'Error: ' . $exception->getMessage();
		}
		if (PHP_SAPI === 'cli') {
			return $message . "\n";
		} else {
			return '<pre>' . htmlspecialchars($message, ENT_QUOTES, $this->charset) . '</pre>';
		}
	}

	/**
	 * Logs the given exception
	 * @param \Exception $exception the exception to be logged
	 */
	protected function logException($exception)
	{
		$category = get_class($exception);
		if ($exception instanceof HttpException) {
			$category = 'yii\\web\\HttpException:' . $exception->statusCode;
		} elseif ($exception instanceof \ErrorException) {
			$category .= ':' . $exception->getSeverity();
		}
		Yii::error((string)$exception, $category);
	}
}