623 lines
14 KiB
PHP
623 lines
14 KiB
PHP
<?php defined('SYSPATH') OR die('No direct access allowed.');
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/**
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* Kohana Exceptions
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*
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* @package Kohana
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* @author Kohana Team
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* @copyright (c) 2007-2009 Kohana Team
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* @license http://kohanaphp.com/license
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*/
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class Kohana_Exception_Core extends Exception {
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public static $enabled = FALSE;
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// Template file
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public static $template = 'kohana/error';
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// Show stack traces in errors
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public static $trace_output = TRUE;
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// Show source code in errors
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public static $source_output = TRUE;
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// To hold unique identifier to distinguish error output
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protected $instance_identifier;
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// Error code
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protected $code = E_KOHANA;
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/**
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* Creates a new translated exception.
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*
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* @param string error message
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* @param array translation variables
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* @return void
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*/
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public function __construct($message, array $variables = NULL, $code = 0)
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{
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$this->instance_identifier = uniqid();
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// Translate the error message
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$message = __($message, $variables);
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// Sets $this->message the proper way
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parent::__construct($message, $code);
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}
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/**
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* Enable Kohana exception handling.
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*
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* @uses Kohana_Exception::$template
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* @return void
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*/
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public static function enable()
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{
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if ( ! Kohana_Exception::$enabled)
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{
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set_exception_handler(array('Kohana_Exception', 'handle'));
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Kohana_Exception::$enabled = TRUE;
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}
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}
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/**
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* Disable Kohana exception handling.
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*
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* @return void
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*/
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public static function disable()
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{
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if (Kohana_Exception::$enabled)
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{
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restore_exception_handler();
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Kohana_Exception::$enabled = FALSE;
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}
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}
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/**
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* Get a single line of text representing the exception:
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*
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* Error [ Code ]: Message ~ File [ Line ]
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*
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* @param object Exception
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* @return string
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*/
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public static function text($e)
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{
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return sprintf('%s [ %s ]: %s ~ %s [ %d ]',
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get_class($e), $e->getCode(), strip_tags($e->getMessage()), Kohana_Exception::debug_path($e->getFile()), $e->getLine());
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}
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/**
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* exception handler, displays the error message, source of the
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* exception, and the stack trace of the error.
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*
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* @uses Kohana::message()
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* @uses Kohana_Exception::text()
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* @param object exception object
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* @return void
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*/
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public static function handle(Exception $e)
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{
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try
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{
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// Get the exception information
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$type = get_class($e);
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$code = $e->getCode();
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$message = $e->getMessage();
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// Create a text version of the exception
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$error = Kohana_Exception::text($e);
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// Add this exception to the log
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Kohana_Log::add('error', $error);
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// Manually save logs after exceptions
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Kohana_Log::save();
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if (Kohana::config('kohana/core.display_errors') === FALSE)
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{
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// Do not show the details
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$file = $line = NULL;
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$trace = array();
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$template = '_disabled';
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}
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else
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{
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$file = $e->getFile();
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$line = $e->getLine();
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$trace = $e->getTrace();
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$template = '';
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}
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if ($e instanceof Kohana_Exception)
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{
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$template = $e->getTemplate().$template;
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if ( ! headers_sent())
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{
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$e->sendHeaders();
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}
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// Use the human-readable error name
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$code = Kohana::message('kohana/core.errors.'.$code);
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}
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else
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{
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$template = Kohana_Exception::$template.$template;
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if ( ! headers_sent())
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{
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header('HTTP/1.1 500 Internal Server Error');
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}
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if ($e instanceof ErrorException)
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{
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// Use the human-readable error name
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$code = Kohana::message('kohana/core.errors.'.$e->getSeverity());
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if (version_compare(PHP_VERSION, '5.3', '<'))
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{
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// Workaround for a bug in ErrorException::getTrace() that exists in
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// all PHP 5.2 versions. @see http://bugs.php.net/45895
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for ($i = count($trace) - 1; $i > 0; --$i)
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{
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if (isset($trace[$i - 1]['args']))
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{
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// Re-position the arguments
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$trace[$i]['args'] = $trace[$i - 1]['args'];
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unset($trace[$i - 1]['args']);
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}
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}
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}
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}
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}
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// Clean the output buffer if one exists
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ob_get_level() and ob_clean();
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if ($template = Kohana::find_file('views', $template))
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{
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include $template;
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}
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}
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catch (Exception $e)
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{
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// Clean the output buffer if one exists
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ob_get_level() and ob_clean();
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// Display the exception text
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echo Kohana_Exception::text($e), "\n";
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}
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if (Kohana::$server_api === 'cli')
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{
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// Exit with an error status
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exit(1);
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}
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}
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/**
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* Returns the template for this exception.
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*
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* @uses Kohana_Exception::$template
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* @return string
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*/
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public function getTemplate()
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{
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return Kohana_Exception::$template;
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}
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/**
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* Sends an Internal Server Error header.
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*
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* @return void
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*/
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public function sendHeaders()
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{
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// Send the 500 header
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header('HTTP/1.1 500 Internal Server Error');
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}
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/**
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* Returns an HTML string of information about a single variable.
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*
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* Borrows heavily on concepts from the Debug class of {@link http://nettephp.com/ Nette}.
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*
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* @param mixed variable to dump
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* @param integer maximum length of strings
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* @param integer maximum levels of recursion
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* @return string
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*/
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public static function dump($value, $length = 128, $max_level = 5)
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{
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return Kohana_Exception::_dump($value, $length, $max_level);
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}
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/**
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* Helper for Kohana_Exception::dump(), handles recursion in arrays and objects.
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*
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* @param mixed variable to dump
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* @param integer maximum length of strings
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* @param integer maximum levels of recursion
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* @param integer current recursion level (internal)
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* @return string
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*/
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private static function _dump( & $var, $length = 128, $max_level = 5, $level = 0)
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{
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if ($var === NULL)
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{
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return '<small>NULL</small>';
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}
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elseif (is_bool($var))
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{
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return '<small>bool</small> '.($var ? 'TRUE' : 'FALSE');
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}
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elseif (is_float($var))
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{
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return '<small>float</small> '.$var;
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}
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elseif (is_resource($var))
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{
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if (($type = get_resource_type($var)) === 'stream' AND $meta = stream_get_meta_data($var))
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{
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$meta = stream_get_meta_data($var);
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if (isset($meta['uri']))
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{
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$file = $meta['uri'];
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if (function_exists('stream_is_local'))
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{
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// Only exists on PHP >= 5.2.4
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if (stream_is_local($file))
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{
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$file = Kohana_Exception::debug_path($file);
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}
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}
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return '<small>resource</small><span>('.$type.')</span> '.htmlspecialchars($file, ENT_NOQUOTES, Kohana::CHARSET);
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}
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}
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else
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{
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return '<small>resource</small><span>('.$type.')</span>';
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}
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}
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elseif (is_string($var))
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{
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if (strlen($var) > $length)
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{
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// Encode the truncated string
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$str = htmlspecialchars(substr($var, 0, $length), ENT_NOQUOTES, Kohana::CHARSET).' …';
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}
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else
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{
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// Encode the string
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$str = htmlspecialchars($var, ENT_NOQUOTES, Kohana::CHARSET);
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}
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return '<small>string</small><span>('.strlen($var).')</span> "'.$str.'"';
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}
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elseif (is_array($var))
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{
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$output = array();
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// Indentation for this variable
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$space = str_repeat($s = ' ', $level);
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static $marker;
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if ($marker === NULL)
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{
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// Make a unique marker
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$marker = uniqid("\x00");
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}
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if (empty($var))
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{
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// Do nothing
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}
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elseif (isset($var[$marker]))
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{
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$output[] = "(\n$space$s*RECURSION*\n$space)";
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}
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elseif ($level <= $max_level)
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{
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$output[] = "<span>(";
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$var[$marker] = TRUE;
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foreach ($var as $key => & $val)
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{
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if ($key === $marker) continue;
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if ( ! is_int($key))
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{
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$key = '"'.$key.'"';
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}
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$output[] = "$space$s$key => ".Kohana_Exception::_dump($val, $length, $max_level, $level + 1);
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}
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unset($var[$marker]);
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$output[] = "$space)</span>";
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}
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else
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{
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// Depth too great
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$output[] = "(\n$space$s...\n$space)";
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}
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return '<small>array</small><span>('.count($var).')</span> '.implode("\n", $output);
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}
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elseif (is_object($var))
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{
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// Copy the object as an array
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$array = (array) $var;
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$output = array();
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// Indentation for this variable
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$space = str_repeat($s = ' ', $level);
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$hash = spl_object_hash($var);
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// Objects that are being dumped
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static $objects = array();
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if (empty($var))
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{
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// Do nothing
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}
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elseif (isset($objects[$hash]))
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{
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$output[] = "{\n$space$s*RECURSION*\n$space}";
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}
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elseif ($level <= $max_level)
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{
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$output[] = "<code>{";
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$objects[$hash] = TRUE;
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foreach ($array as $key => & $val)
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{
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if ($key[0] === "\x00")
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{
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// Determine if the access is private or protected
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$access = '<small>'.($key[1] === '*' ? 'protected' : 'private').'</small>';
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// Remove the access level from the variable name
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$key = substr($key, strrpos($key, "\x00") + 1);
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}
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else
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{
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$access = '<small>public</small>';
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}
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$output[] = "$space$s$access $key => ".Kohana_Exception::_dump($val, $length, $max_level, $level + 1);
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}
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unset($objects[$hash]);
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$output[] = "$space}</code>";
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}
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else
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{
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// Depth too great
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$output[] = "{\n$space$s...\n$space}";
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}
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return '<small>object</small> <span>'.get_class($var).'('.count($array).')</span> '.implode("\n", $output);
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}
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else
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{
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return '<small>'.gettype($var).'</small> '.htmlspecialchars(print_r($var, TRUE), ENT_NOQUOTES, Kohana::CHARSET);
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}
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}
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/**
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* Removes APPPATH, SYSPATH, MODPATH, and DOCROOT from filenames, replacing
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* them with the plain text equivalents.
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*
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* @param string path to sanitize
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* @return string
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*/
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public static function debug_path($file)
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{
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// Normalize directory separator
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$file = str_replace('\\', '/', $file);
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if (strpos($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($file, SYSPATH) === 0)
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{
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$file = 'SYSPATH/'.substr($file, strlen(SYSPATH));
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}
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elseif (strpos($file, MODPATH) === 0)
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{
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$file = 'MODPATH/'.substr($file, strlen(MODPATH));
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}
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elseif (strpos($file, DOCROOT) === 0)
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{
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$file = 'DOCROOT/'.substr($file, strlen(DOCROOT));
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}
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return $file;
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}
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/**
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* Returns an array of lines from a file.
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*
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* // Returns the current line of the current file
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* echo Kohana_Exception::debug_source(__FILE__, __LINE__);
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*
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* @param string file to open
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* @param integer line number to find
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* @param integer number of padding lines
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* @return array
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*/
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public static function debug_source($file, $line_number, $padding = 5)
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{
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// Make sure we can read the source file
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if ( ! is_readable($file))
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return array();
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// Open the file and set the line position
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$file = fopen($file, 'r');
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$line = 0;
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// Set the reading range
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$range = array('start' => $line_number - $padding, 'end' => $line_number + $padding);
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// Set the zero-padding amount for line numbers
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$format = '% '.strlen($range['end']).'d';
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$source = array();
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while (($row = fgets($file)) !== FALSE)
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{
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// Increment the line number
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if (++$line > $range['end'])
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break;
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if ($line >= $range['start'])
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{
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$source[sprintf($format, $line)] = $row;
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}
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}
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// Close the file
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fclose($file);
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return $source;
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}
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/**
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* Returns an array of strings that represent each step in the backtrace.
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*
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* @param array trace to analyze
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* @return array
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*/
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public static function trace($trace = NULL)
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{
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if ($trace === NULL)
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{
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// Start a new trace
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$trace = debug_backtrace();
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}
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// Non-standard function calls
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$statements = array('include', 'include_once', 'require', 'require_once');
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$output = array();
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foreach ($trace as $step)
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{
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if ( ! isset($step['function']))
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{
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// Invalid trace step
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continue;
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}
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if (isset($step['file']) AND isset($step['line']))
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{
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// Include the source of this step
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$source = Kohana_Exception::debug_source($step['file'], $step['line']);
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}
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if (isset($step['file']))
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{
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$file = $step['file'];
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if (isset($step['line']))
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{
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$line = $step['line'];
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}
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}
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// function()
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$function = $step['function'];
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if (in_array($step['function'], $statements))
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{
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if (empty($step['args']))
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{
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// No arguments
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$args = array();
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}
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else
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{
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// Sanitize the file path
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$args = array($step['args'][0]);
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}
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}
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elseif (isset($step['args']))
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{
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if ($step['function'] === '{closure}')
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{
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// Introspection on closures in a stack trace is impossible
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$params = NULL;
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}
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else
|
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{
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if (isset($step['class']))
|
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{
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if (method_exists($step['class'], $step['function']))
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{
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$reflection = new ReflectionMethod($step['class'], $step['function']);
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}
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else
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{
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$reflection = new ReflectionMethod($step['class'], '__call');
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}
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}
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else
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{
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$reflection = new ReflectionFunction($step['function']);
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}
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// Get the function parameters
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$params = $reflection->getParameters();
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}
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$args = array();
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foreach ($step['args'] as $i => $arg)
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{
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if (isset($params[$i]))
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{
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// Assign the argument by the parameter name
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$args[$params[$i]->name] = $arg;
|
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}
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else
|
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{
|
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// Assign the argument by number
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$args[$i] = $arg;
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}
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}
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}
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|
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if (isset($step['class']))
|
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{
|
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// Class->method() or Class::method()
|
|
$function = $step['class'].$step['type'].$step['function'];
|
|
}
|
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|
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$output[] = array(
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'function' => $function,
|
|
'args' => isset($args) ? $args : NULL,
|
|
'file' => isset($file) ? $file : NULL,
|
|
'line' => isset($line) ? $line : NULL,
|
|
'source' => isset($source) ? $source : NULL,
|
|
);
|
|
|
|
unset($function, $args, $file, $line, $source);
|
|
}
|
|
|
|
return $output;
|
|
}
|
|
|
|
} // End Kohana Exception
|