diff options
Diffstat (limited to 'includes/Exception.php')
| -rw-r--r-- | includes/Exception.php | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/includes/Exception.php b/includes/Exception.php new file mode 100644 index 00000000..1e24515b --- /dev/null +++ b/includes/Exception.php @@ -0,0 +1,193 @@ +<?php + +class MWException extends Exception +{ + function useOutputPage() { + return !empty( $GLOBALS['wgFullyInitialised'] ); + } + + 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() { + return '<p>' . htmlspecialchars( $this->getMessage() ) . + '</p><p>Backtrace:</p><p>' . nl2br( htmlspecialchars( $this->getTraceAsString() ) ) . + "</p>\n"; + } + + function getText() { + return $this->getMessage() . + "\nBacktrace:\n" . $this->getTraceAsString() . "\n"; + } + + function getPageTitle() { + if ( $this->useMessageCache() ) { + return wfMsg( 'internalerror' ); + } else { + global $wgSitename; + return "$wgSitename error"; + } + } + + 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 { + $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 ( is_a( $e, '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 { + wfProfileClose(); + logProfilingData(); // uses $wgRequest, hence the $wgFullyInitialised condition + } catch ( Exception $e ) {} + } + + // Exit value should be nonzero for the benefit of shell jobs + exit( 1 ); +} + +?> |