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<?php |
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/** |
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* @link http://www.yiiframework.com/ |
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* @copyright Copyright (c) 2008 Yii Software LLC |
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* @license http://www.yiiframework.com/license/ |
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*/ |
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namespace yii\web; |
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use Yii; |
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use yii\base\Exception; |
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use yii\base\ErrorException; |
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use yii\base\UserException; |
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use yii\helpers\VarDumper; |
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/** |
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* ErrorHandler handles uncaught PHP errors and exceptions. |
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* |
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* ErrorHandler displays these errors using appropriate views based on the |
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* nature of the errors and the mode the application runs at. |
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* |
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* ErrorHandler is configured as an application component in [[\yii\base\Application]] by default. |
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* You can access that instance via `Yii::$app->errorHandler`. |
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* |
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* For more details and usage information on ErrorHandler, see the [guide article on handling errors](guide:runtime-handling-errors). |
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* |
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* @author Qiang Xue <[email protected]> |
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* @author Timur Ruziev <[email protected]> |
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* @since 2.0 |
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*/ |
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class ErrorHandler extends \yii\base\ErrorHandler |
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{ |
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/** |
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* @var int maximum number of source code lines to be displayed. Defaults to 19. |
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*/ |
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public $maxSourceLines = 19; |
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/** |
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* @var int maximum number of trace source code lines to be displayed. Defaults to 13. |
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*/ |
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public $maxTraceSourceLines = 13; |
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/** |
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* @var string the route (e.g. `site/error`) to the controller action that will be used |
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* to display external errors. Inside the action, it can retrieve the error information |
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* using `Yii::$app->errorHandler->exception`. This property defaults to null, meaning ErrorHandler |
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* will handle the error display. |
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*/ |
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public $errorAction; |
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/** |
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* @var string the path of the view file for rendering exceptions without call stack information. |
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*/ |
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public $errorView = '@yii/views/errorHandler/error.php'; |
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/** |
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* @var string the path of the view file for rendering exceptions. |
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*/ |
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public $exceptionView = '@yii/views/errorHandler/exception.php'; |
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/** |
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* @var string the path of the view file for rendering exceptions and errors call stack element. |
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*/ |
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public $callStackItemView = '@yii/views/errorHandler/callStackItem.php'; |
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/** |
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* @var string the path of the view file for rendering previous exceptions. |
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*/ |
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public $previousExceptionView = '@yii/views/errorHandler/previousException.php'; |
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/** |
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* @var array list of the PHP predefined variables that should be displayed on the error page. |
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* Note that a variable must be accessible via `$GLOBALS`. Otherwise it won't be displayed. |
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* Defaults to `['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION']`. |
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* @see renderRequest() |
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* @since 2.0.7 |
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*/ |
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public $displayVars = ['_GET', '_POST', '_FILES', '_COOKIE', '_SESSION']; |
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/** |
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* Renders the exception. |
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* @param \Exception|\Error $exception the exception to be rendered. |
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*/ |
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protected function renderException($exception) |
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{ |
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if (Yii::$app->has('response')) { |
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$response = Yii::$app->getResponse(); |
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// reset parameters of response to avoid interference with partially created response data |
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// in case the error occurred while sending the response. |
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$response->isSent = false; |
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$response->stream = null; |
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$response->data = null; |
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$response->content = null; |
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} else { |
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$response = new Response(); |
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} |
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$response->setStatusCodeByException($exception); |
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$useErrorView = $response->format === Response::FORMAT_HTML && (!YII_DEBUG || $exception instanceof UserException); |
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if ($useErrorView && $this->errorAction !== null) { |
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$result = Yii::$app->runAction($this->errorAction); |
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if ($result instanceof Response) { |
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$response = $result; |
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} else { |
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$response->data = $result; |
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} |
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} elseif ($response->format === Response::FORMAT_HTML) { |
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if ($this->shouldRenderSimpleHtml()) { |
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// AJAX request |
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$response->data = '<pre>' . $this->htmlEncode(static::convertExceptionToString($exception)) . '</pre>'; |
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} else { |
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// if there is an error during error rendering it's useful to |
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// display PHP error in debug mode instead of a blank screen |
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if (YII_DEBUG) { |
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ini_set('display_errors', 1); |
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} |
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$file = $useErrorView ? $this->errorView : $this->exceptionView; |
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$response->data = $this->renderFile($file, [ |
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'exception' => $exception, |
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]); |
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} |
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} elseif ($response->format === Response::FORMAT_RAW) { |
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$response->data = static::convertExceptionToString($exception); |
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} else { |
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$response->data = $this->convertExceptionToArray($exception); |
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} |
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$response->send(); |
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} |
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/** |
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* Converts an exception into an array. |
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* @param \Exception|\Error $exception the exception being converted |
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* @return array the array representation of the exception. |
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*/ |
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protected function convertExceptionToArray($exception) |
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{ |
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if (!YII_DEBUG && !$exception instanceof UserException && !$exception instanceof HttpException) { |
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$exception = new HttpException(500, Yii::t('yii', 'An internal server error occurred.')); |
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} |
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$array = [ |
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'name' => ($exception instanceof Exception || $exception instanceof ErrorException) ? $exception->getName() : 'Exception', |
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'message' => $exception->getMessage(), |
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'code' => $exception->getCode(), |
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]; |
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if ($exception instanceof HttpException) { |
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$array['status'] = $exception->statusCode; |
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} |
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if (YII_DEBUG) { |
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$array['type'] = get_class($exception); |
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if (!$exception instanceof UserException) { |
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$array['file'] = $exception->getFile(); |
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$array['line'] = $exception->getLine(); |
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$array['stack-trace'] = explode("\n", $exception->getTraceAsString()); |
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if ($exception instanceof \yii\db\Exception) { |
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$array['error-info'] = $exception->errorInfo; |
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} |
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} |
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} |
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if (($prev = $exception->getPrevious()) !== null) { |
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$array['previous'] = $this->convertExceptionToArray($prev); |
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} |
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return $array; |
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} |
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/** |
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* Converts special characters to HTML entities. |
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* @param string $text to encode. |
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* @return string encoded original text. |
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*/ |
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public function htmlEncode($text) |
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{ |
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return htmlspecialchars($text, ENT_QUOTES, 'UTF-8'); |
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} |
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/** |
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* Adds informational links to the given PHP type/class. |
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* @param string $code type/class name to be linkified. |
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* @return string linkified with HTML type/class name. |
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*/ |
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public function addTypeLinks($code) |
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{ |
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if (preg_match('/(.*?)::([^(]+)/', $code, $matches)) { |
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$class = $matches[1]; |
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$method = $matches[2]; |
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$text = $this->htmlEncode($class) . '::' . $this->htmlEncode($method); |
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} else { |
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$class = $code; |
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$method = null; |
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$text = $this->htmlEncode($class); |
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} |
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$url = null; |
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$shouldGenerateLink = true; |
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if ($method !== null && substr_compare($method, '{closure}', -9) !== 0) { |
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$reflection = new \ReflectionMethod($class, $method); |
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$shouldGenerateLink = $reflection->isPublic() || $reflection->isProtected(); |
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} |
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if ($shouldGenerateLink) { |
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$url = $this->getTypeUrl($class, $method); |
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} |
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if ($url === null) { |
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return $text; |
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} |
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return '<a href="' . $url . '" target="_blank">' . $text . '</a>'; |
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} |
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/** |
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* Returns the informational link URL for a given PHP type/class. |
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* @param string $class the type or class name. |
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* @param string|null $method the method name. |
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* @return string|null the informational link URL. |
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* @see addTypeLinks() |
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*/ |
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protected function getTypeUrl($class, $method) |
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{ |
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if (strpos($class, 'yii\\') !== 0) { |
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return null; |
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} |
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$page = $this->htmlEncode(strtolower(str_replace('\\', '-', $class))); |
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$url = "http://www.yiiframework.com/doc-2.0/$page.html"; |
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if ($method) { |
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$url .= "#$method()-detail"; |
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} |
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return $url; |
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} |
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/** |
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* Renders a view file as a PHP script. |
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* @param string $_file_ the view file. |
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* @param array $_params_ the parameters (name-value pairs) that will be extracted and made available in the view file. |
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* @return string the rendering result |
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*/ |
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public function renderFile($_file_, $_params_) |
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{ |
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$_params_['handler'] = $this; |
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if ($this->exception instanceof ErrorException || !Yii::$app->has('view')) { |
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ob_start(); |
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ob_implicit_flush(false); |
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extract($_params_, EXTR_OVERWRITE); |
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require(Yii::getAlias($_file_)); |
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return ob_get_clean(); |
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} else { |
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return Yii::$app->getView()->renderFile($_file_, $_params_, $this); |
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} |
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} |
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/** |
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* Renders the previous exception stack for a given Exception. |
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* @param \Exception $exception the exception whose precursors should be rendered. |
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* @return string HTML content of the rendered previous exceptions. |
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* Empty string if there are none. |
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*/ |
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public function renderPreviousExceptions($exception) |
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{ |
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if (($previous = $exception->getPrevious()) !== null) { |
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return $this->renderFile($this->previousExceptionView, ['exception' => $previous]); |
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} else { |
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return ''; |
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} |
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} |
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/** |
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* Renders a single call stack element. |
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* @param string|null $file name where call has happened. |
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* @param int|null $line number on which call has happened. |
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* @param string|null $class called class name. |
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* @param string|null $method called function/method name. |
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* @param array $args array of method arguments. |
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* @param int $index number of the call stack element. |
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* @return string HTML content of the rendered call stack element. |
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*/ |
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public function renderCallStackItem($file, $line, $class, $method, $args, $index) |
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{ |
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$lines = []; |
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$begin = $end = 0; |
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if ($file !== null && $line !== null) { |
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$line--; // adjust line number from one-based to zero-based |
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$lines = @file($file); |
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if ($line < 0 || $lines === false || ($lineCount = count($lines)) < $line) { |
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return ''; |
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} |
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$half = (int) (($index === 1 ? $this->maxSourceLines : $this->maxTraceSourceLines) / 2); |
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$begin = $line - $half > 0 ? $line - $half : 0; |
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$end = $line + $half < $lineCount ? $line + $half : $lineCount - 1; |
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} |
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return $this->renderFile($this->callStackItemView, [ |
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'file' => $file, |
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'line' => $line, |
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'class' => $class, |
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'method' => $method, |
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'index' => $index, |
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'lines' => $lines, |
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'begin' => $begin, |
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'end' => $end, |
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'args' => $args, |
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]); |
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} |
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/** |
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* Renders call stack. |
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* @param \Exception $exception exception to get call stack from |
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* @return string HTML content of the rendered call stack. |
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* @since 2.0.12 |
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*/ |
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public function renderCallStack(\Exception $exception) |
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{ |
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$out = '<ul>'; |
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$out .= $this->renderCallStackItem($exception->getFile(), $exception->getLine(), null, null, [], 1); |
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for ($i = 0, $trace = $exception->getTrace(), $length = count($trace); $i < $length; ++$i) { |
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$file = !empty($trace[$i]['file']) ? $trace[$i]['file'] : null; |
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$line = !empty($trace[$i]['line']) ? $trace[$i]['line'] : null; |
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$class = !empty($trace[$i]['class']) ? $trace[$i]['class'] : null; |
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$function = null; |
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if (!empty($trace[$i]['function']) && $trace[$i]['function'] !== 'unknown') { |
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$function = $trace[$i]['function']; |
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} |
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$args = !empty($trace[$i]['args']) ? $trace[$i]['args'] : []; |
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$out .= $this->renderCallStackItem($file, $line, $class, $function, $args, $i + 2); |
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} |
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$out .= '</ul>'; |
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return $out; |
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} |
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/** |
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* Renders the global variables of the request. |
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* List of global variables is defined in [[displayVars]]. |
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* @return string the rendering result |
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* @see displayVars |
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*/ |
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public function renderRequest() |
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{ |
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$request = ''; |
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foreach ($this->displayVars as $name) { |
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if (!empty($GLOBALS[$name])) { |
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$request .= '$' . $name . ' = ' . VarDumper::export($GLOBALS[$name]) . ";\n\n"; |
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} |
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} |
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return '<pre>' . $this->htmlEncode(rtrim($request, "\n")) . '</pre>'; |
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} |
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/** |
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|
|
* Determines whether given name of the file belongs to the framework. |
352
|
|
|
* @param string $file name to be checked. |
353
|
|
|
* @return bool whether given name of the file belongs to the framework. |
354
|
|
|
*/ |
355
|
|
|
public function isCoreFile($file) |
356
|
|
|
{ |
357
|
|
|
return $file === null || strpos(realpath($file), YII2_PATH . DIRECTORY_SEPARATOR) === 0; |
358
|
|
|
} |
359
|
|
|
|
360
|
|
|
/** |
361
|
|
|
* Creates HTML containing link to the page with the information on given HTTP status code. |
362
|
|
|
* @param int $statusCode to be used to generate information link. |
363
|
|
|
* @param string $statusDescription Description to display after the the status code. |
364
|
|
|
* @return string generated HTML with HTTP status code information. |
365
|
|
|
*/ |
366
|
|
|
public function createHttpStatusLink($statusCode, $statusDescription) |
367
|
|
|
{ |
368
|
|
|
return '<a href="http://en.wikipedia.org/wiki/List_of_HTTP_status_codes#' . (int) $statusCode . '" target="_blank">HTTP ' . (int) $statusCode . ' – ' . $statusDescription . '</a>'; |
369
|
|
|
} |
370
|
|
|
|
371
|
|
|
/** |
372
|
|
|
* Creates string containing HTML link which refers to the home page of determined web-server software |
373
|
|
|
* and its full name. |
374
|
|
|
* @return string server software information hyperlink. |
375
|
|
|
*/ |
376
|
|
|
public function createServerInformationLink() |
377
|
|
|
{ |
378
|
|
|
$serverUrls = [ |
379
|
|
|
'http://httpd.apache.org/' => ['apache'], |
380
|
|
|
'http://nginx.org/' => ['nginx'], |
381
|
|
|
'http://lighttpd.net/' => ['lighttpd'], |
382
|
|
|
'http://gwan.com/' => ['g-wan', 'gwan'], |
383
|
|
|
'http://iis.net/' => ['iis', 'services'], |
384
|
|
|
'http://php.net/manual/en/features.commandline.webserver.php' => ['development'], |
385
|
|
|
]; |
386
|
|
|
if (isset($_SERVER['SERVER_SOFTWARE'])) { |
387
|
|
|
foreach ($serverUrls as $url => $keywords) { |
388
|
|
|
foreach ($keywords as $keyword) { |
389
|
|
|
if (stripos($_SERVER['SERVER_SOFTWARE'], $keyword) !== false) { |
390
|
|
|
return '<a href="' . $url . '" target="_blank">' . $this->htmlEncode($_SERVER['SERVER_SOFTWARE']) . '</a>'; |
391
|
|
|
} |
392
|
|
|
} |
393
|
|
|
} |
394
|
|
|
} |
395
|
|
|
|
396
|
|
|
return ''; |
397
|
|
|
} |
398
|
|
|
|
399
|
|
|
/** |
400
|
|
|
* Creates string containing HTML link which refers to the page with the current version |
401
|
|
|
* of the framework and version number text. |
402
|
|
|
* @return string framework version information hyperlink. |
403
|
|
|
*/ |
404
|
|
|
public function createFrameworkVersionLink() |
405
|
|
|
{ |
406
|
|
|
return '<a href="http://github.com/yiisoft/yii2/" target="_blank">' . $this->htmlEncode(Yii::getVersion()) . '</a>'; |
407
|
|
|
} |
408
|
|
|
|
409
|
|
|
/** |
410
|
|
|
* Converts arguments array to its string representation |
411
|
|
|
* |
412
|
|
|
* @param array $args arguments array to be converted |
413
|
|
|
* @return string string representation of the arguments array |
414
|
|
|
*/ |
415
|
|
|
public function argumentsToString($args) |
416
|
|
|
{ |
417
|
|
|
$count = 0; |
418
|
|
|
$isAssoc = $args !== array_values($args); |
419
|
|
|
|
420
|
|
|
foreach ($args as $key => $value) { |
421
|
|
|
$count++; |
422
|
|
|
if ($count>=5) { |
423
|
|
|
if ($count>5) { |
424
|
|
|
unset($args[$key]); |
425
|
|
|
} else { |
426
|
|
|
$args[$key] = '...'; |
427
|
|
|
} |
428
|
|
|
continue; |
429
|
|
|
} |
430
|
|
|
|
431
|
|
|
if (is_object($value)) { |
432
|
|
|
$args[$key] = '<span class="title">' . $this->htmlEncode(get_class($value)) . '</span>'; |
433
|
|
|
} elseif (is_bool($value)) { |
434
|
|
|
$args[$key] = '<span class="keyword">' . ($value ? 'true' : 'false') . '</span>'; |
435
|
|
|
} elseif (is_string($value)) { |
436
|
|
|
$fullValue = $this->htmlEncode($value); |
437
|
|
|
if (mb_strlen($value, 'UTF-8') > 32) { |
438
|
|
|
$displayValue = $this->htmlEncode(mb_substr($value, 0, 32, 'UTF-8')) . '...'; |
439
|
|
|
$args[$key] = "<span class=\"string\" title=\"$fullValue\">'$displayValue'</span>"; |
440
|
|
|
} else { |
441
|
|
|
$args[$key] = "<span class=\"string\">'$fullValue'</span>"; |
442
|
|
|
} |
443
|
|
|
} elseif (is_array($value)) { |
444
|
|
|
$args[$key] = '[' . $this->argumentsToString($value) . ']'; |
445
|
|
|
} elseif ($value === null) { |
446
|
|
|
$args[$key] = '<span class="keyword">null</span>'; |
447
|
|
|
} elseif (is_resource($value)) { |
448
|
|
|
$args[$key] = '<span class="keyword">resource</span>'; |
449
|
|
|
} else { |
450
|
|
|
$args[$key] = '<span class="number">' . $value . '</span>'; |
451
|
|
|
} |
452
|
|
|
|
453
|
|
|
if (is_string($key)) { |
454
|
|
|
$args[$key] = '<span class="string">\'' . $this->htmlEncode($key) . "'</span> => $args[$key]"; |
455
|
|
|
} elseif ($isAssoc) { |
456
|
|
|
$args[$key] = "<span class=\"number\">$key</span> => $args[$key]"; |
457
|
|
|
} |
458
|
|
|
} |
459
|
|
|
|
460
|
|
|
return implode(', ', $args); |
461
|
|
|
} |
462
|
|
|
|
463
|
|
|
/** |
464
|
|
|
* Returns human-readable exception name |
465
|
|
|
* @param \Exception $exception |
466
|
|
|
* @return string human-readable exception name or null if it cannot be determined |
467
|
|
|
*/ |
468
|
3 |
|
public function getExceptionName($exception) |
469
|
|
|
{ |
470
|
3 |
|
if ($exception instanceof \yii\base\Exception || $exception instanceof \yii\base\InvalidCallException || $exception instanceof \yii\base\InvalidParamException || $exception instanceof \yii\base\UnknownMethodException) { |
471
|
3 |
|
return $exception->getName(); |
472
|
|
|
} |
473
|
|
|
return null; |
474
|
|
|
} |
475
|
|
|
|
476
|
|
|
/** |
477
|
|
|
* @return bool if simple HTML should be rendered |
478
|
|
|
* @since 2.0.12 |
479
|
|
|
*/ |
480
|
|
|
protected function shouldRenderSimpleHtml() |
481
|
|
|
{ |
482
|
|
|
return YII_ENV_TEST || isset($_SERVER['HTTP_X_REQUESTED_WITH']) && $_SERVER['HTTP_X_REQUESTED_WITH'] === 'XMLHttpRequest'; |
483
|
|
|
} |
484
|
|
|
} |
485
|
|
|
|
In PHP, under loose comparison (like
==
, or!=
, orswitch
conditions), values of different types might be equal.For
string
values, the empty string''
is a special case, in particular the following results might be unexpected: