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459 lines
12 KiB
PHP
459 lines
12 KiB
PHP
<?php namespace CodeIgniter\Debug;
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/**
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* CodeIgniter
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*
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* An open source application development framework for PHP
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*
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* This content is released under the MIT License (MIT)
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*
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* Copyright (c) 2014-2017 British Columbia Institute of Technology
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*
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* @package CodeIgniter
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* @author CodeIgniter Dev Team
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* @copyright 2014-2017 British Columbia Institute of Technology (https://bcit.ca/)
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://codeigniter.com
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* @since Version 3.0.0
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* @filesource
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*/
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use Config\Services;
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use Psr\Log\LoggerAwareTrait;
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require __DIR__.'/CustomExceptions.php';
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/**
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* Exceptions manager
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*/
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class Exceptions
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{
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/**
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* Nesting level of the output buffering mechanism
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*
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* @var int
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*/
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public $ob_level;
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/**
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* The path to the directory containing the
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* cli and html error view directories.
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*
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* @var string
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*/
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protected $viewPath;
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/**
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* @var \Config\Exceptions
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*/
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protected $config;
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//--------------------------------------------------------------------
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/**
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* Constructor.
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*
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* @param \Config\Exceptions $config
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*/
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public function __construct(\Config\Exceptions $config)
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{
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$this->ob_level = ob_get_level();
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$this->viewPath = rtrim($config->errorViewPath, '/ ') . '/';
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$this->config = $config;
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}
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//--------------------------------------------------------------------
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/**
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* Responsible for registering the error, exception and shutdown
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* handling of our application.
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*/
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public function initialize()
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{
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//Set the Exception Handler
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set_exception_handler([$this, 'exceptionHandler']);
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// Set the Error Handler
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set_error_handler([$this, 'errorHandler']);
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// Set the handler for shutdown to catch Parse errors
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// Do we need this in PHP7?
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register_shutdown_function([$this, 'shutdownHandler']);
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}
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//--------------------------------------------------------------------
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/**
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* Catches any uncaught errors and exceptions, including most Fatal errors
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* (Yay PHP7!). Will log the error, display it if display_errors is on,
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* and fire an event that allows custom actions to be taken at this point.
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*
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* @param \Throwable $exception
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*/
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public function exceptionHandler(\Throwable $exception)
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{
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$codes = $this->determineCodes($exception);
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$statusCode = $codes[0];
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$exitCode = $codes[1];
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// Log it
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if ($this->config->log === true && ! in_array($statusCode, $this->config->ignoreCodes))
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{
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log_message('critical', $exception->getMessage()."\n{trace}", [
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'trace' => $exception->getTraceAsString()
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]);
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}
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if (! is_cli())
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{
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$response = Services::response()->setStatusCode($statusCode);
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$header = "HTTP/1.1 {$response->getStatusCode()} {$response->getReason()}";
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header($header, true, $statusCode);
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}
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$this->render($exception, $statusCode);
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exit($exitCode);
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}
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//--------------------------------------------------------------------
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/**
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* Even in PHP7, some errors make it through to the errorHandler, so
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* convert these to Exceptions and let the exception handler log it and
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* display it.
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*
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* This seems to be primarily when a user triggers it with trigger_error().
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*
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* @param int $severity
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* @param string $message
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* @param string|null $file
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* @param int|null $line
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* @param null $context
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*
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* @throws \ErrorException
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*/
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public function errorHandler(int $severity, string $message, string $file = null, int $line = null, $context = null)
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{
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// Convert it to an exception and pass it along.
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throw new \ErrorException($message, 0, $severity, $file, $line);
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}
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//--------------------------------------------------------------------
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/**
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* Checks to see if any errors have happened during shutdown that
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* need to be caught and handle them.
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*/
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public function shutdownHandler()
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{
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$error = error_get_last();
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// If we've got an error that hasn't been displayed, then convert
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// it to an Exception and use the Exception handler to display it
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// to the user.
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if ( ! is_null($error))
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{
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// Fatal Error?
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if (in_array($error['type'], [E_ERROR, E_CORE_ERROR, E_COMPILE_ERROR, E_PARSE]))
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{
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$this->exceptionHandler(new \ErrorException($error['message'], $error['type'], 0, $error['file'], $error['line']));
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}
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}
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}
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//--------------------------------------------------------------------
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/**
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* Determines the view to display based on the exception thrown,
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* whether an HTTP or CLI request, etc.
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*
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* @param \Throwable $exception
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* @param string $template_path
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*
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* @return string The path and filename of the view file to use
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*/
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protected function determineView(\Throwable $exception, string $template_path): string
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{
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// Production environments should have a custom exception file.
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$view = 'production.php';
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$template_path = rtrim($template_path, '/ ') . '/';
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if (str_ireplace(['off', 'none', 'no', 'false', 'null'], '', ini_get('display_errors')))
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{
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$view = 'error_exception.php';
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}
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// 404 Errors
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if ($exception instanceof \CodeIgniter\PageNotFoundException)
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{
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return 'error_404.php';
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}
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// Allow for custom views based upon the status code
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else if (is_file($template_path . 'error_' . $exception->getCode() . '.php'))
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{
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return 'error_' . $exception->getCode() . '.php';
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}
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return $view;
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}
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//--------------------------------------------------------------------
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/**
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* Given an exception and status code will display the error to the client.
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*
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* @param \Throwable $exception
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* @param int $statusCode
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*/
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protected function render(\Throwable $exception, int $statusCode)
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{
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// Determine directory with views
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$path = $this->viewPath;
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if (empty($path))
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{
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$path = APPPATH . 'Views/errors/';
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}
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$path = is_cli()
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? $path.'cli/'
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: $path.'html/';
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// Determine the vew
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$view = $this->determineView($exception, $path);
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// Prepare the vars
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$vars = $this->collectVars($exception, $statusCode);
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extract($vars);
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// Render it
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if (ob_get_level() > $this->ob_level + 1)
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{
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ob_end_clean();
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}
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ob_start();
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include($path . $view);
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$buffer = ob_get_contents();
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ob_end_clean();
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echo $buffer;
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}
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//--------------------------------------------------------------------
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/**
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* Gathers the variables that will be made available to the view.
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*
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* @param \Throwable $exception
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* @param int $statusCode
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*
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* @return array
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*/
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protected function collectVars(\Throwable $exception, int $statusCode)
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{
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return [
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'type' => get_class($exception),
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'code' => $statusCode,
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'message' => $exception->getMessage() ?? '(null)',
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'file' => $exception->getFile(),
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'line' => $exception->getLine(),
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'trace' => $exception->getTrace(),
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'title' => get_class($exception)
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];
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}
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/**
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* Determines the HTTP status code and the exit status code for this request.
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*
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* @param \Throwable $exception
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*
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* @return array
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*/
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protected function determineCodes(\Throwable $exception): array
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{
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$statusCode = abs($exception->getCode());
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if ($statusCode < 100 || $statusCode > 599)
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{
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$exitStatus = $statusCode + EXIT__AUTO_MIN; // 9 is EXIT__AUTO_MIN
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if ($exitStatus > EXIT__AUTO_MAX) // 125 is EXIT__AUTO_MAX
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{
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$exitStatus = EXIT_ERROR; // EXIT_ERROR
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}
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$statusCode = 500;
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}
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else
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{
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$exitStatus = 1; // EXIT_ERROR
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}
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return [
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$statusCode ?? 500,
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$exitStatus
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];
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}
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//--------------------------------------------------------------------
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//--------------------------------------------------------------------
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// Display Methods
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//--------------------------------------------------------------------
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/**
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* Clean Path
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*
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* This makes nicer looking paths for the error output.
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*
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* @param string $file
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*
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* @return string
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*/
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public static function cleanPath($file)
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{
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if (strpos($file, APPPATH) === 0)
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{
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$file = 'APPPATH/' . substr($file, strlen(APPPATH));
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}
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elseif (strpos($file, BASEPATH) === 0)
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{
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$file = 'BASEPATH/' . substr($file, strlen(BASEPATH));
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}
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elseif (strpos($file, FCPATH) === 0)
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{
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$file = 'FCPATH/' . substr($file, strlen(FCPATH));
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}
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return $file;
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}
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//--------------------------------------------------------------------
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/**
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* Describes memory usage in real-world units. Intended for use
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* with memory_get_usage, etc.
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*
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* @param $bytes
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*
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* @return string
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*/
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public static function describeMemory(int $bytes): string
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{
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if ($bytes < 1024)
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{
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return $bytes . 'B';
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}
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else if ($bytes < 1048576)
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{
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return round($bytes / 1024, 2) . 'KB';
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}
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return round($bytes / 1048576, 2) . 'MB';
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}
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//--------------------------------------------------------------------
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/**
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* Creates a syntax-highlighted version of a PHP file.
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*
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* @param $file
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* @param $lineNumber
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* @param int $lines
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*
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* @return bool|string
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*/
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public static function highlightFile($file, $lineNumber, $lines = 15)
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{
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if (empty($file) || ! is_readable($file))
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{
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return false;
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}
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// Set our highlight colors:
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if (function_exists('ini_set'))
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{
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ini_set('highlight.comment', '#767a7e; font-style: italic');
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ini_set('highlight.default', '#c7c7c7');
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ini_set('highlight.html', '#06B');
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ini_set('highlight.keyword', '#f1ce61;');
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ini_set('highlight.string', '#869d6a');
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}
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try
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{
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$source = file_get_contents($file);
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} catch (\Throwable $e)
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{
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return false;
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}
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$source = str_replace(["\r\n", "\r"], "\n", $source);
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$source = explode("\n", highlight_string($source, true));
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$source = str_replace('<br />', "\n", $source[1]);
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$source = explode("\n", str_replace("\r\n", "\n", $source));
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// Get just the part to show
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$start = $lineNumber - (int) round($lines / 2);
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$start = $start < 0 ? 0 : $start;
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// Get just the lines we need to display, while keeping line numbers...
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$source = array_splice($source, $start, $lines, true);
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// Used to format the line number in the source
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$format = '% ' . strlen($start + $lines) . 'd';
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$out = '';
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// Because the highlighting may have an uneven number
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// of open and close span tags on one line, we need
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// to ensure we can close them all to get the lines
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// showing correctly.
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$spans = 1;
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foreach ($source as $n => $row)
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{
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$spans += substr_count($row, '<span') - substr_count($row, '</span');
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$row = str_replace(["\r", "\n"], ['', ''], $row);
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if (($n + $start + 1) == $lineNumber)
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{
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preg_match_all('#<[^>]+>#', $row, $tags);
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$out .= sprintf("<span class='line highlight'><span class='number'>{$format}</span> %s\n</span>%s", $n + $start + 1, strip_tags($row), implode('', $tags[0])
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);
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}
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else
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{
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$out .= sprintf('<span class="line"><span class="number">' . $format . '</span> %s', $n + $start + 1, $row) . "\n";
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}
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}
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if ($spans > 0)
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{
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$out .= str_repeat('</span>', $spans);
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}
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return '<pre><code>' . $out . '</code></pre>';
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}
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//--------------------------------------------------------------------
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}
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