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<?php
class MWException extends Exception
{
function useOutputPage() {
return !empty( $GLOBALS['wgFullyInitialised'] ) &&
!empty( $GLOBALS['wgArticle'] ) && !empty( $GLOBALS['wgTitle'] );
}
function useMessageCache() {
global $wgLang;
return is_object( $wgLang );
}
function msg( $key, $fallback /*[, params...] */ ) {
$args = array_slice( func_get_args(), 2 );
if ( $this->useMessageCache() ) {
return wfMsgReal( $key, $args );
} else {
return wfMsgReplaceArgs( $fallback, $args );
}
}
function getHTML() {
global $wgShowExceptionDetails;
if( $wgShowExceptionDetails ) {
return '<p>' . htmlspecialchars( $this->getMessage() ) .
'</p><p>Backtrace:</p><p>' . nl2br( htmlspecialchars( $this->getTraceAsString() ) ) .
"</p>\n";
} else {
return "<p>Set <b><tt>\$wgShowExceptionDetails = true;</tt></b> " .
"in LocalSettings.php to show detailed debugging information.</p>";
}
}
function getText() {
global $wgShowExceptionDetails;
if( $wgShowExceptionDetails ) {
return $this->getMessage() .
"\nBacktrace:\n" . $this->getTraceAsString() . "\n";
} else {
return "<p>Set <tt>\$wgShowExceptionDetails = true;</tt> " .
"in LocalSettings.php to show detailed debugging information.</p>";
}
}
function getPageTitle() {
if ( $this->useMessageCache() ) {
return wfMsg( 'internalerror' );
} else {
global $wgSitename;
return "$wgSitename error";
}
}
function getLogMessage() {
$file = $this->getFile();
$line = $this->getLine();
$message = $this->getMessage();
return "{$_SERVER['REQUEST_URI']} Exception from line $line of $file: $message";
}
function reportHTML() {
global $wgOut;
if ( $this->useOutputPage() ) {
$wgOut->setPageTitle( $this->getPageTitle() );
$wgOut->setRobotpolicy( "noindex,nofollow" );
$wgOut->setArticleRelated( false );
$wgOut->enableClientCache( false );
$wgOut->redirect( '' );
$wgOut->clearHTML();
$wgOut->addHTML( $this->getHTML() );
$wgOut->output();
} else {
echo $this->htmlHeader();
echo $this->getHTML();
echo $this->htmlFooter();
}
}
function reportText() {
echo $this->getText();
}
function report() {
global $wgCommandLineMode;
if ( $wgCommandLineMode ) {
$this->reportText();
} else {
$log = $this->getLogMessage();
if ( $log ) {
wfDebugLog( 'exception', $log );
}
$this->reportHTML();
}
}
function htmlHeader() {
global $wgLogo, $wgSitename, $wgOutputEncoding;
if ( !headers_sent() ) {
header( 'HTTP/1.0 500 Internal Server Error' );
header( 'Content-type: text/html; charset='.$wgOutputEncoding );
/* Don't cache error pages! They cause no end of trouble... */
header( 'Cache-control: none' );
header( 'Pragma: nocache' );
}
$title = $this->getPageTitle();
echo "<html>
<head>
<title>$title</title>
</head>
<body>
<h1><img src='$wgLogo' style='float:left;margin-right:1em' alt=''>$title</h1>
";
}
function htmlFooter() {
echo "</body></html>";
}
}
/**
* Exception class which takes an HTML error message, and does not
* produce a backtrace. Replacement for OutputPage::fatalError().
*/
class FatalError extends MWException {
function getHTML() {
return $this->getMessage();
}
function getText() {
return $this->getMessage();
}
}
class ErrorPageError extends MWException {
public $title, $msg;
/**
* Note: these arguments are keys into wfMsg(), not text!
*/
function __construct( $title, $msg ) {
$this->title = $title;
$this->msg = $msg;
parent::__construct( wfMsg( $msg ) );
}
function report() {
global $wgOut;
$wgOut->showErrorPage( $this->title, $this->msg );
$wgOut->output();
}
}
/**
* Install an exception handler for MediaWiki exception types.
*/
function wfInstallExceptionHandler() {
set_exception_handler( 'wfExceptionHandler' );
}
/**
* Report an exception to the user
*/
function wfReportException( Exception $e ) {
if ( $e instanceof MWException ) {
try {
$e->report();
} catch ( Exception $e2 ) {
// Exception occurred from within exception handler
// Show a simpler error message for the original exception,
// don't try to invoke report()
$message = "MediaWiki internal error.\n\n" .
"Original exception: " . $e->__toString() .
"\n\nException caught inside exception handler: " .
$e2->__toString() . "\n";
if ( !empty( $GLOBALS['wgCommandLineMode'] ) ) {
echo $message;
} else {
echo nl2br( htmlspecialchars( $message ) ). "\n";
}
}
} else {
echo $e->__toString();
}
}
/**
* Exception handler which simulates the appropriate catch() handling:
*
* try {
* ...
* } catch ( MWException $e ) {
* $e->report();
* } catch ( Exception $e ) {
* echo $e->__toString();
* }
*/
function wfExceptionHandler( $e ) {
global $wgFullyInitialised;
wfReportException( $e );
// Final cleanup, similar to wfErrorExit()
if ( $wgFullyInitialised ) {
try {
wfLogProfilingData(); // uses $wgRequest, hence the $wgFullyInitialised condition
} catch ( Exception $e ) {}
}
// Exit value should be nonzero for the benefit of shell jobs
exit( 1 );
}
?>
|
