+++ /dev/null
-<?php
-/**
- * Exception class and handler
- *
- * @file
- */
-
-/**
- * @defgroup Exception Exception
- */
-
-/**
- * MediaWiki exception
- *
- * @ingroup Exception
- */
-class MWException extends Exception {
- /**
- * Should the exception use $wgOut to output the error ?
- * @return bool
- */
- function useOutputPage() {
- return $this->useMessageCache() &&
- !empty( $GLOBALS['wgFullyInitialised'] ) &&
- ( !empty( $GLOBALS['wgArticle'] ) || ( !empty( $GLOBALS['wgOut'] ) && !$GLOBALS['wgOut']->isArticle() ) ) &&
- !empty( $GLOBALS['wgTitle'] );
- }
-
- /**
- * Can the extension use wfMsg() to get i18n messages ?
- * @return bool
- */
- function useMessageCache() {
- global $wgLang;
-
- foreach ( $this->getTrace() as $frame ) {
- if ( isset( $frame['class'] ) && $frame['class'] === 'LocalisationCache' ) {
- return false;
- }
- }
-
- return is_object( $wgLang );
- }
-
- /**
- * Run hook to allow extensions to modify the text of the exception
- *
- * @param $name String: class name of the exception
- * @param $args Array: arguments to pass to the callback functions
- * @return Mixed: string to output or null if any hook has been called
- */
- function runHooks( $name, $args = array() ) {
- global $wgExceptionHooks;
-
- if ( !isset( $wgExceptionHooks ) || !is_array( $wgExceptionHooks ) ) {
- return; // Just silently ignore
- }
-
- if ( !array_key_exists( $name, $wgExceptionHooks ) || !is_array( $wgExceptionHooks[ $name ] ) ) {
- return;
- }
-
- $hooks = $wgExceptionHooks[ $name ];
- $callargs = array_merge( array( $this ), $args );
-
- foreach ( $hooks as $hook ) {
- if ( is_string( $hook ) || ( is_array( $hook ) && count( $hook ) >= 2 && is_string( $hook[0] ) ) ) { // 'function' or array( 'class', hook' )
- $result = call_user_func_array( $hook, $callargs );
- } else {
- $result = null;
- }
-
- if ( is_string( $result ) )
- return $result;
- }
- }
-
- /**
- * Get a message from i18n
- *
- * @param $key String: message name
- * @param $fallback String: default message if the message cache can't be
- * called by the exception
- * The function also has other parameters that are arguments for the message
- * @return String message with arguments replaced
- */
- function msg( $key, $fallback /*[, params...] */ ) {
- $args = array_slice( func_get_args(), 2 );
-
- if ( $this->useMessageCache() ) {
- return wfMsgReal( $key, $args );
- } else {
- return wfMsgReplaceArgs( $fallback, $args );
- }
- }
-
- /**
- * If $wgShowExceptionDetails is true, return a HTML message with a
- * backtrace to the error, otherwise show a message to ask to set it to true
- * to show that information.
- *
- * @return String html to output
- */
- function getHTML() {
- global $wgShowExceptionDetails;
-
- if ( $wgShowExceptionDetails ) {
- return '<p>' . nl2br( htmlspecialchars( $this->getMessage() ) ) .
- '</p><p>Backtrace:</p><p>' . nl2br( htmlspecialchars( $this->getTraceAsString() ) ) .
- "</p>\n";
- } else {
- return "<p>Set <b><tt>\$wgShowExceptionDetails = true;</tt></b> " .
- "at the bottom of LocalSettings.php to show detailed " .
- "debugging information.</p>";
- }
- }
-
- /**
- * If $wgShowExceptionDetails is true, return a text message with a
- * backtrace to the error.
- */
- function getText() {
- global $wgShowExceptionDetails;
-
- if ( $wgShowExceptionDetails ) {
- return $this->getMessage() .
- "\nBacktrace:\n" . $this->getTraceAsString() . "\n";
- } else {
- return "Set \$wgShowExceptionDetails = true; " .
- "in LocalSettings.php to show detailed debugging information.\n";
- }
- }
-
- /* Return titles of this error page */
- function getPageTitle() {
- if ( $this->useMessageCache() ) {
- return wfMsg( 'internalerror' );
- } else {
- global $wgSitename;
-
- return "$wgSitename error";
- }
- }
-
- /**
- * Return the requested URL and point to file and line number from which the
- * exception occured
- *
- * @return String
- */
- function getLogMessage() {
- global $wgRequest;
-
- $file = $this->getFile();
- $line = $this->getLine();
- $message = $this->getMessage();
-
- if ( isset( $wgRequest ) ) {
- $url = $wgRequest->getRequestURL();
- if ( !$url ) {
- $url = '[no URL]';
- }
- } else {
- $url = '[no req]';
- }
-
- return "$url Exception from line $line of $file: $message";
- }
-
- /** Output the exception report using HTML */
- 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();
-
- $hookResult = $this->runHooks( get_class( $this ) );
- if ( $hookResult ) {
- $wgOut->addHTML( $hookResult );
- } else {
- $wgOut->addHTML( $this->getHTML() );
- }
-
- $wgOut->output();
- } else {
- $hookResult = $this->runHooks( get_class( $this ) . "Raw" );
- if ( $hookResult ) {
- die( $hookResult );
- }
-
- if ( defined( 'MEDIAWIKI_INSTALL' ) || $this->htmlBodyOnly() ) {
- echo $this->getHTML();
- } else {
- echo $this->htmlHeader();
- echo $this->getHTML();
- echo $this->htmlFooter();
- }
- }
- }
-
- /**
- * Output a report about the exception and takes care of formatting.
- * It will be either HTML or plain text based on isCommandLine().
- */
- function report() {
- $log = $this->getLogMessage();
-
- if ( $log ) {
- wfDebugLog( 'exception', $log );
- }
-
- if ( self::isCommandLine() ) {
- wfPrintError( $this->getText() );
- } else {
- $this->reportHTML();
- }
- }
-
- /**
- * Send headers and output the beginning of the html page if not using
- * $wgOut to output the exception.
- */
- function htmlHeader() {
- global $wgLogo, $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' );
- }
-
- $logo = htmlspecialchars( $wgLogo, ENT_QUOTES );
- $title = htmlspecialchars( $this->getPageTitle() );
-
- return "<html>
- <head>
- <title>$title</title>
- </head>
- <body>
- <h1><img src='$logo' style='float:left;margin-right:1em' alt=''/>$title</h1>
- ";
- }
-
- /**
- * print the end of the html page if not using $wgOut.
- */
- function htmlFooter() {
- return "</body></html>";
- }
-
- /**
- * headers handled by subclass?
- */
- function htmlBodyOnly() {
- return false;
- }
-
- static function isCommandLine() {
- return !empty( $GLOBALS['wgCommandLineMode'] ) && !defined( 'MEDIAWIKI_INSTALL' );
- }
-}
-
-/**
- * Exception class which takes an HTML error message, and does not
- * produce a backtrace. Replacement for OutputPage::fatalError().
- * @ingroup Exception
- */
-class FatalError extends MWException {
- function getHTML() {
- return $this->getMessage();
- }
-
- function getText() {
- return $this->getMessage();
- }
-}
-
-/**
- * @ingroup Exception
- */
-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 ) {
- global $wgShowExceptionDetails;
-
- $cmdLine = MWException::isCommandLine();
-
- 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";
-
- if ( $wgShowExceptionDetails ) {
- $message .= 'Original exception: ' . $e->__toString() . "\n\n" .
- 'Exception caught inside exception handler: ' . $e2->__toString();
- } else {
- $message .= "Exception caught inside exception handler.\n\n" .
- "Set \$wgShowExceptionDetails = true; at the bottom of LocalSettings.php " .
- "to show detailed debugging information.";
- }
-
- $message .= "\n";
-
- if ( $cmdLine ) {
- wfPrintError( $message );
- } else {
- echo nl2br( htmlspecialchars( $message ) ) . "\n";
- }
- }
- } else {
- $message = "Unexpected non-MediaWiki exception encountered, of type \"" . get_class( $e ) . "\"\n" .
- $e->__toString() . "\n";
-
- if ( $wgShowExceptionDetails ) {
- $message .= "\n" . $e->getTraceAsString() . "\n";
- }
-
- if ( $cmdLine ) {
- wfPrintError( $message );
- } else {
- echo nl2br( htmlspecialchars( $message ) ) . "\n";
- }
- }
-}
-
-/**
- * Print a message, if possible to STDERR.
- * Use this in command line mode only (see isCommandLine)
- */
-function wfPrintError( $message ) {
- # NOTE: STDERR may not be available, especially if php-cgi is used from the command line (bug #15602).
- # Try to produce meaningful output anyway. Using echo may corrupt output to STDOUT though.
- if ( defined( 'STDERR' ) ) {
- fwrite( STDERR, $message );
- } else {
- echo( $message );
- }
-}
-
-/**
- * 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
- 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 );
-}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff