cakephp2-php8/cake/libs/error_handler.php

286 lines
8.3 KiB
PHP

<?php
/**
* Error handler
*
* Provides Error Capturing for Framework errors.
*
* PHP 5
*
* CakePHP(tm) : Rapid Development Framework (http://cakephp.org)
* Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
*
* Licensed under The MIT License
* Redistributions of files must retain the above copyright notice.
*
* @copyright Copyright 2005-2010, Cake Software Foundation, Inc. (http://cakefoundation.org)
* @link http://cakephp.org CakePHP(tm) Project
* @package cake
* @subpackage cake.cake.libs
* @since CakePHP(tm) v 0.10.5.1732
* @license MIT License (http://www.opensource.org/licenses/mit-license.php)
*/
/**
* Error Handler.
*
* Captures and handles all unhandled exceptions. Displays helpful framework errors when debug > 1.
* When debug < 1 a CakeException will render 404 or 500 errors. If an uncaught exception is thrown
* and it is a type that ErrorHandler does not know about it will be treated as a 500 error.
*
* ### Implementing application specific exception handling
*
* You can implement application specific exception handling in one of a few ways:
*
* - Create a AppController::appError();
* - Create an AppError class.
*
* #### Using AppController::appError();
*
* This controller method is called instead of the default exception handling. It receives the
* thrown exception as its only argument. You should implement your error handling in that method.
*
* #### Using an AppError class
*
* This approach gives more flexibility and power in how you handle exceptions. You can create
* `app/libs/app_error.php` and create a class called `AppError`. The core ErrorHandler class
* will attempt to construct this class and let it handle the exception. This provides a more
* flexible way to handle exceptions in your application.
*
* Finally, in your `app/config/bootstrap.php` you can configure use `set_exception_handler()`
* to take total control over application exception handling.
*
* @package cake
* @subpackage cake.cake.libs
*/
class ErrorHandler {
/**
* Controller instance.
*
* @var Controller
* @access public
*/
public $controller = null;
/**
* template to render for CakeException
*
* @var string
*/
public $template = '';
/**
* The method corresponding to the Exception this object is for.
*
* @var string
*/
public $method = '';
/**
* The exception being handled.
*
* @var Exception
*/
public $error = null;
/**
* Creates the controller to perform rendering on the error response.
* If the error is a CakeException it will be converted to either a 400 or a 500
* code error depending on the code used to construct the error.
*
* @param string $method Method producing the error
* @param array $messages Error messages
*/
function __construct(Exception $exception) {
App::import('Core', 'Sanitize');
$this->controller = $this->_getController($exception);
if (method_exists($this->controller, 'apperror')) {
return $this->controller->appError($exception);
}
$method = $template = Inflector::variable(str_replace('Exception', '', get_class($exception)));
$code = $exception->getCode();
$methodExists = method_exists($this, $method);
if ($exception instanceof CakeException && !$methodExists) {
$method = '_cakeError';
if ($template == 'internalError') {
$template = 'error500';
}
} elseif (!$methodExists) {
$method = 'error500';
if ($code >= 400) {
$method = 'error400';
}
}
if (Configure::read('debug') == 0) {
$parentClass = get_parent_class($this);
if ($parentClass != 'ErrorHandler') {
$method = 'error400';
}
$parentMethods = (array)get_class_methods($parentClass);
if (in_array($method, $parentMethods)) {
$method = 'error400';
}
if ($code == 500) {
$method = 'error500';
}
}
$this->template = $template;
$this->method = $method;
$this->error = $exception;
}
/**
* Get the controller instance to handle the exception.
* Override this method in subclasses to customize the controller used.
* This method returns the built in `CakeErrorController` normally, or if an error is repeated
* a bare controller will be used.
*
* @param Exception $exception The exception to get a controller for.
* @return Controller
*/
protected function _getController($exception) {
static $__previousError = null;
App::import('Controller', 'CakeError');
if ($__previousError != $exception) {
$__previousError = $exception;
$controller = new CakeErrorController();
} else {
$controller = new Controller();
$controller->viewPath = 'errors';
}
return $controller;
}
/**
* Set as the default exception handler by the CakePHP bootstrap process.
*
* This will either use an AppError class if your application has one,
* or use the default ErrorHandler.
*
* @return void
* @see http://php.net/manual/en/function.set-exception-handler.php
*/
public static function handleException(Exception $exception) {
if (file_exists(APP . 'app_error.php') || class_exists('AppError')) {
if (!class_exists('AppError')) {
require(APP . 'app_error.php');
}
$AppError = new AppError($exception);
return $AppError->render();
}
$error = new ErrorHandler($exception);
$error->render();
}
/**
* Set as the default error handler by CakePHP. Use Configure::write('Error.handler', $callback), to use your own
* error handling methods. This function will use Debugger to display errors when debug > 0. And
* will log errors to CakeLog, when debug == 0.
*
* You can use Configure::write('Error.level', $value); to set what type of errors will be handled here.
*
* @param integer $code Code of error
* @param string $description Error description
* @param string $file File on which error occurred
* @param integer $line Line that triggered the error
* @param array $context Context
* @return boolean true if error was handled
*/
public static function handleError($code, $description, $file = null, $line = null, $context = null) {
$debug = Configure::read('debug');
if ($debug) {
if (!class_exists('Debugger')) {
require LIBS . 'debugger.php';
}
return Debugger::showError($code, $description, $file, $line, $context);
} else {
if (!class_exists('CakeLog')) {
require LIBS . 'cake_log.php';
}
return CakeLog::logError($code, $description, $file, $line, $context);
}
}
/**
* Renders the response for the exception.
*
* @return void
*/
public function render() {
call_user_func_array(array($this, $this->method), array($this->error));
}
/**
* Generic handler for the internal framework errors CakePHP can generate.
*
* @param CakeExeption $error
* @return void
*/
protected function _cakeError(CakeException $error) {
$url = Router::normalize($this->controller->request->here);
$code = $error->getCode();
$this->controller->response->statusCode($code);
$this->controller->set(array(
'code' => $code,
'url' => h($url),
'name' => $error->getMessage(),
'error' => $error,
));
$this->controller->set($error->getAttributes());
$this->_outputMessage($this->template);
}
/**
* Convenience method to display a 400 series page.
*
* @param array $params Parameters for controller
*/
public function error400($error) {
$message = $error->getMessage();
if (Configure::read('debug') == 0 && $error instanceof CakeException) {
$message = __('Not Found');
}
$url = Router::normalize($this->controller->request->here);
$this->controller->response->statusCode($error->getCode());
$this->controller->set(array(
'name' => $message,
'url' => h($url),
'error' => $error,
));
$this->_outputMessage('error400');
}
/**
* Convenience method to display a 500 page.
*
* @param array $params Parameters for controller
*/
public function error500($error) {
$url = Router::normalize($this->controller->request->here);
$code = ($error->getCode() > 500) ? $error->getCode() : 500;
$this->controller->response->statusCode($code);
$this->controller->set(array(
'name' => __('An Internal Error Has Occurred'),
'message' => h($url),
'error' => $error,
));
$this->_outputMessage('error500');
}
/**
* Generate the response using the controller object.
*
* @param string $template The template to render.
*/
protected function _outputMessage($template) {
$this->controller->render($template);
$this->controller->afterFilter();
$this->controller->response->send();
}
}