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<?php
/**
* TActivePageAdapter, TCallbackErrorHandler and TInvalidCallbackException class file.
*
* @author Wei Zhuo <weizhuo[at]gamil[dot]com>
* @author Gabor Berczi <gabor.berczi@devworx.hu> (lazyload additions & progressive rendering)
* @link http://www.pradosoft.com/
* @copyright Copyright © 2005-2014 PradoSoft
* @license http://www.pradosoft.com/license/
* @package Prado\Web\UI\ActiveControls
*/
namespace Prado\Web\UI\ActiveControls;
use Exception;
use Prado\Exceptions\TErrorHandler;
use Prado\Exceptions\TPhpErrorException;
use Prado\Prado;
use Prado\TApplication;
use Prado\Web\Javascripts\TJavaScript;
/**
* TCallbackErrorHandler class.
*
* Captures errors and exceptions and send them back during callback response.
* When the application is in debug mode, the error and exception stack trace
* are shown. A TJavascriptLogger must be present on the client-side to view
* the error stack trace.
*
* @author Wei Zhuo <weizhuo[at]gmail[dot]com>
* @package Prado\Web\UI\ActiveControls
* @since 3.1
*/
class TCallbackErrorHandler extends TErrorHandler
{
/**
* Displays the exceptions to the client-side TJavascriptLogger.
* A HTTP 500 status code is sent and the stack trace is sent as JSON encoded.
* @param Exception exception details.
*/
protected function displayException($exception)
{
if($this->getApplication()->getMode()===TApplication::STATE_DEBUG)
{
$response = $this->getApplication()->getResponse();
$trace = $this->getExceptionStackTrace($exception);
// avoid error on non-utf8 strings
try {
$trace = TJavaScript::jsonEncode($trace);
} catch (Exception $e) {
// strip everythin not 7bit ascii
$trace = preg_replace('/[^(\x20-\x7F)]*/','', serialize($trace));
}
// avoid exception loop if headers have already been sent
try {
$response->setStatusCode(500, 'Internal Server Error');
} catch (Exception $e) { }
$content = $response->createHtmlWriter();
$content->getWriter()->setBoundary(TActivePageAdapter::CALLBACK_ERROR_HEADER);
$content->write($trace);
}
else
{
error_log("Error happened while processing an existing error:\n".$exception->__toString());
header('HTTP/1.0 500 Internal Server Error', true, 500);
}
$this->getApplication()->getResponse()->flush();
}
/**
* @param Exception exception details.
* @return array exception stack trace details.
*/
private function getExceptionStackTrace($exception)
{
$data['code']=$exception->getCode() > 0 ? $exception->getCode() : 500;
$data['file']=$exception->getFile();
$data['line']=$exception->getLine();
$data['trace']=$exception->getTrace();
if($exception instanceof TPhpErrorException)
{
// if PHP exception, we want to show the 2nd stack level context
// because the 1st stack level is of little use (it's in error handler)
if(isset($trace[0]) && isset($trace[0]['file']) && isset($trace[0]['line']))
{
$data['file']=$trace[0]['file'];
$data['line']=$trace[0]['line'];
}
}
$data['type']=get_class($exception);
$data['message']=$exception->getMessage();
$data['version']=$_SERVER['SERVER_SOFTWARE'].' '.Prado::getVersion();
$data['time']=@strftime('%Y-%m-%d %H:%M',time());
return $data;
}
}
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