<?php
/**
* @package midcom_core
* @author The Midgard Project, http://www.midgard-project.org
* @copyright The Midgard Project, http://www.midgard-project.org
* @license http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public License
*/
/**
* MidCOM 3 exception handler
*
* @package midcom_core
*/
class midcom_core_exceptionhandler
{
public static function handle(Exception $exception)
{
// Different HTTP error codes for different Exceptions
$message_type = get_class($exception);
switch ($message_type)
{
case 'midcom_exception_notfound':
case 'midcom_exception_unauthorized':
case 'midcom_exception_httperror':
$http_code = $exception->getCode();
break;
default:
$http_code = 500;
break;
}
$message = $exception->getMessage();
header("X-MidCOM-Error: {$message}");
if (headers_sent())
{
die("<h1>Unexpected Error</h1>\n\n<p>Headers were sent so we don't have correct HTTP code ({$http_code}).</p>\n\n<p>{$message_type}: {$message}</p>\n");
}
$header = self::header_by_code($http_code);
header($header);
if ($http_code != 304)
{
header('Content-Type: text/html; charset=utf-8');
$data['header'] = $header;
$data['message_type'] = $message_type;
$data['message'] = $message;
$data['exception'] = $exception;
try
{
if (!isset($_MIDCOM))
{
throw new Exception("MidCOM not loaded");
}
$_MIDCOM->context->set_item('midcom_core_exceptionhandler', $data);
$_MIDCOM->context->set_item('template_entry_point', 'midcom-show-error');
$_MIDCOM->templating->template();
$_MIDCOM->templating->display();
}
catch (Exception $e)
{
// Templating isn't working
echo "<!DOCTYPE html>\n";
echo "<html>\n";
echo " <head>\n";
echo " <title>{$header}</title>\n";
echo " </head>\n";
echo " <body class=\"{$message_type}\">\n";
echo " <h1>{$header}</h1>\n";
echo " <p>{$message}</p>\n";
echo " </body>\n";
echo "</html>";
}
}
}
private static function header_by_code($code)
{
$headers = array
(
200 => 'HTTP/1.0 200 OK',
303 => 'HTTP/1.0 303 See Other',
304 => 'HTTP/1.0 304 Not Modified',
401 => 'HTTP/1.0 401 Unauthorized',
404 => 'HTTP/1.0 404 Not Found',
405 => 'HTTP/1.0 405 Method not allowed',
500 => 'HTTP/1.0 500 Server Error',
503 => 'HTTP/1.0 503 Service Unavailable',
);
if (!isset($headers[$code]))
{
$code = 500;
}
return $headers[$code];
}
}
/**
* MidCOM 3 "not found" exception
*
* @package midcom_core
*/
class midcom_exception_notfound extends Exception
{
// Redefine the exception so message isn't optional
public function __construct($message, $code = 404)
{
parent::__construct($message, $code);
}
}
/**
* MidCOM 3 "unauthorized" exception
*
* @package midcom_core
*/
class midcom_exception_unauthorized extends Exception
{
// Redefine the exception so message isn't optional
public function __construct($message, $code = 401)
{
parent::__construct($message, $code);
}
}
/**
* MidCOM 3 generic HTTP error exception
*
* @package midcom_core
*/
class midcom_exception_httperror extends Exception
{
// Redefine the exception so message isn't optional
public function __construct($message, $code = 500)
{
parent::__construct($message, $code);
}
}
set_exception_handler(array('midcom_core_exceptionhandler', 'handle'));
?>
) is private.
