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<?php
class TErrorHandler extends TComponent implements IModule
{
/**
* @var string module ID
*/
private $_id;
/**
* @var TApplication application instance
*/
private $_application;
/**
* @var array list of pages for displaying various HTTP errors
*/
private $_errorPages=array();
/**
* Initializes the module.
* This method is required by IModule and is invoked by application.
* @param TApplication application
* @param TXmlElement module configuration
*/
public function init($application,$config)
{
$this->_application=$application;
$application->attachEventHandler('Error',array($this,'handleError'));
$application->setErrorHandler($this);
foreach($config->getElementsByTagName('error') as $node)
{
if(($code=$node->getAttribute('code'))===null || $code==='*')
$code=0;
else
$this->_errorPages[$node->getAttribute('code')]=$node->getAttribute('page');
}
}
/**
* @return string id of this module
*/
public function getID()
{
return $this->_id;
}
/**
* @param string id of this module
*/
public function setID($value)
{
$this->_id=$value;
}
public function handleError($sender,$param)
{
static $handling=false;
if($handling)
$this->handleRecursiveError($param);
else
{
$handling=true;
if(($response=Prado::getApplication()->getResponse())!==null)
$response->clear();
if($param instanceof THttpException)
$this->handleExternalError($param->getStatusCode(),$param);
else if(Prado::getApplication()->getMode()==='Debug')
$this->displayException($param);
else
$this->handleExternalError(500,$param);
}
exit(1);
}
protected function handleExternalError($statusCode,$exception)
{
if(!($exception instanceof THttpException))
error_log($exception->__toString());
if(isset($this->_errorPages["$statusCode"]) || isset($this->_errorPages[0]))
{
if(isset($this->_errorPages["$statusCode"]))
$page=Prado::createComponent($this->_errorPages["$statusCode"]);
else
$page=Prado::createComponent($this->_errorPages[0]);
$writer=new THtmlTextWriter($this->_application->getResponse());
$page->run($writer);
$writer->flush();
}
else
{
$base=dirname(__FILE__).'/error';
$languages=Prado::getUserLanguages();
$lang=$languages[0];
if(is_file("$base$statusCode.$lang"))
$errorFile="$base$statusCode.$lang";
else if(is_file("$base$statusCode.en"))
$errorFile="$base$statusCode.en";
else if(is_file("$base.$lang"))
$errorFile="$base.$lang";
else
$errorFile="$base.en";
if(($content=@file_get_contents($errorFile))===false)
die("Unable to open error template file '$errorFile'.");
$serverAdmin=isset($_SERVER['SERVER_ADMIN'])?$_SERVER['SERVER_ADMIN']:'';
$fields=array(
'%%StatusCode%%',
'%%ErrorMessage%%',
'%%ServerAdmin%%',
'%%Version%%',
'%%Time%%'
);
$values=array(
"$statusCode",
htmlspecialchars($exception->getMessage()),
$serverAdmin,
$_SERVER['SERVER_SOFTWARE'].' <a href="http://www.pradosoft.com/">PRADO</a>/'.Prado::getVersion(),
strftime('%Y-%m-%d %H:%m',time())
);
echo str_replace($fields,$values,$content);
}
}
protected function handleRecursiveError($exception)
{
if(Prado::getApplication()->getMode()==='Debug')
{
echo "<html><head><title>Recursive Error</title></head>\n";
echo "<body><h1>Recursive Error</h1>\n";
echo "<pre>".$exception."</pre>\n";
echo "</body></html>";
}
else
{
error_log("Error happened while processing an existing error:\n".$param->__toString());
header('HTTP/1.0 500 Internal Error');
}
}
protected function displayException($exception)
{
$lines=file($exception->getFile());
$errorLine=$exception->getLine();
$beginLine=$errorLine-9>=0?$errorLine-9:0;
$endLine=$errorLine+8<=count($lines)?$errorLine+8:count($lines);
$source='';
for($i=$beginLine;$i<$endLine;++$i)
{
if($i===$errorLine-1)
{
$line=highlight_string(sprintf("Line %4d: %s",$i+1,$lines[$i]),true);
$source.="<div style=\"background-color: #ffeeee\">".$line."</div>";
}
else
$source.=highlight_string(sprintf("Line %4d: %s",$i+1,$lines[$i]),true);
}
$fields=array(
'%%ErrorType%%',
'%%ErrorMessage%%',
'%%SourceFile%%',
'%%SourceCode%%',
'%%StackTrace%%',
'%%Version%%',
'%%Time%%'
);
$values=array(
get_class($exception),
htmlspecialchars($exception->getMessage()),
htmlspecialchars($exception->getFile()).' ('.$exception->getLine().')',
$source,
htmlspecialchars($exception->getTraceAsString()),
$_SERVER['SERVER_SOFTWARE'].' <a href="http://www.pradosoft.com/">PRADO</a>/'.Prado::getVersion(),
strftime('%Y-%m-%d %H:%m',time())
);
$languages=Prado::getUserLanguages();
$exceptionFile=dirname(__FILE__).'/exception.'.$languages[0];
if(!is_file($exceptionFile))
$exceptionFile=dirname(__FILE__).'/exception.en';
if(($content=@file_get_contents($exceptionFile))===false)
die("Unable to open exception template file '$errorFile'.");
echo str_replace($fields,$values,$content);
}
}
?>
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