db = $db; parent::__construct( $error ); } /** * @param $html string * @return string */ protected function getContentMessage( $html ) { if ( $html ) { return nl2br( htmlspecialchars( $this->getMessage() ) ); } else { return $this->getMessage(); } } /** * @return string */ function getText() { global $wgShowDBErrorBacktrace; $s = $this->getContentMessage( false ) . "\n"; if ( $wgShowDBErrorBacktrace ) { $s .= "Backtrace:\n" . $this->getTraceAsString() . "\n"; } return $s; } /** * @return string */ function getHTML() { global $wgShowDBErrorBacktrace; $s = $this->getContentMessage( true ); if ( $wgShowDBErrorBacktrace ) { $s .= '

Backtrace:

' . nl2br( htmlspecialchars( $this->getTraceAsString() ) ); } return $s; } } /** * @ingroup Database */ class DBConnectionError extends DBError { public $error; function __construct( DatabaseBase &$db, $error = 'unknown error' ) { $msg = 'DB connection error'; if ( trim( $error ) != '' ) { $msg .= ": $error"; } $this->error = $error; parent::__construct( $db, $msg ); } /** * @return bool */ function useOutputPage() { // Not likely to work return false; } /** * @param $key * @param $fallback * @return string */ function msg( $key, $fallback /*[, params...] */ ) { global $wgLang; $args = array_slice( func_get_args(), 2 ); if ( $this->useMessageCache() ) { $message = $wgLang->getMessage( $key ); } else { $message = $fallback; } return wfMsgReplaceArgs( $message, $args ); } /** * @return bool */ function getLogMessage() { # Don't send to the exception log return false; } /** * @return string */ function getPageTitle() { global $wgSitename; return htmlspecialchars( $this->msg( 'dberr-header', "$wgSitename has a problem" ) ); } /** * @return string */ function getHTML() { global $wgShowDBErrorBacktrace; $sorry = htmlspecialchars( $this->msg( 'dberr-problems', 'Sorry! This site is experiencing technical difficulties.' ) ); $again = htmlspecialchars( $this->msg( 'dberr-again', 'Try waiting a few minutes and reloading.' ) ); $info = htmlspecialchars( $this->msg( 'dberr-info', '(Can\'t contact the database server: $1)' ) ); # No database access MessageCache::singleton()->disable(); if ( trim( $this->error ) == '' ) { $this->error = $this->db->getProperty( 'mServer' ); } $this->error = Html::element( 'span', array( 'dir' => 'ltr' ), $this->error ); $noconnect = "

$sorry

$again

$info

"; $text = str_replace( '$1', $this->error, $noconnect ); if ( $wgShowDBErrorBacktrace ) { $text .= '

Backtrace:

' . nl2br( htmlspecialchars( $this->getTraceAsString() ) ); } $extra = $this->searchForm(); return "$text

$extra"; } public function reportHTML(){ global $wgUseFileCache; # Check whether we can serve a file-cached copy of the page with the error underneath if ( $wgUseFileCache ) { try { $cache = $this->fileCachedPage(); # Cached version on file system? if ( $cache !== null ) { # Hack: extend the body for error messages $cache = str_replace( array( '', '' ), '', $cache ); # Add cache notice... $cache .= '
'. htmlspecialchars( $this->msg( 'dberr-cachederror', 'This is a cached copy of the requested page, and may not be up to date. ' ) ) . '
'; # Output cached page with notices on bottom and re-close body echo "{$cache}
{$this->getHTML()}"; return; } } catch ( MWException $e ) { // Do nothing, just use the default page } } # We can't, cough and die in the usual fashion parent::reportHTML(); } /** * @return string */ function searchForm() { global $wgSitename, $wgCanonicalServer, $wgRequest; $usegoogle = htmlspecialchars( $this->msg( 'dberr-usegoogle', 'You can try searching via Google in the meantime.' ) ); $outofdate = htmlspecialchars( $this->msg( 'dberr-outofdate', 'Note that their indexes of our content may be out of date.' ) ); $googlesearch = htmlspecialchars( $this->msg( 'searchbutton', 'Search' ) ); $search = htmlspecialchars( $wgRequest->getVal( 'search' ) ); $server = htmlspecialchars( $wgCanonicalServer ); $sitename = htmlspecialchars( $wgSitename ); $trygoogle = <<$usegoogle
$outofdate
EOT; return $trygoogle; } /** * @return string */ private function fileCachedPage() { global $wgTitle, $wgOut, $wgRequest; if ( $wgOut->isDisabled() ) { return ''; // Done already? } if ( $wgTitle ) { // use $wgTitle if we managed to set it $t = $wgTitle->getPrefixedDBkey(); } else { # Fallback to the raw title URL param. We can't use the Title # class is it may hit the interwiki table and give a DB error. # We may get a cache miss due to not sanitizing the title though. $t = str_replace( ' ', '_', $wgRequest->getVal( 'title' ) ); if ( $t == '' ) { // fallback to main page $t = Title::newFromText( $this->msg( 'mainpage', 'Main Page' ) )->getPrefixedDBkey(); } } $cache = HTMLFileCache::newFromTitle( $t, 'view' ); if ( $cache->isCached() ) { return $cache->fetchText(); } else { return ''; } } } /** * @ingroup Database */ class DBQueryError extends DBError { public $error, $errno, $sql, $fname; /** * @param $db DatabaseBase * @param $error string * @param $errno int|string * @param $sql string * @param $fname string */ function __construct( DatabaseBase &$db, $error, $errno, $sql, $fname ) { $message = "A database error has occurred. Did you forget to run maintenance/update.php after upgrading? See: https://www.mediawiki.org/wiki/Manual:Upgrading#Run_the_update_script\n" . "Query: $sql\n" . "Function: $fname\n" . "Error: $errno $error\n"; parent::__construct( $db, $message ); $this->error = $error; $this->errno = $errno; $this->sql = $sql; $this->fname = $fname; } /** * @param $html string * @return string */ function getContentMessage( $html ) { if ( $this->useMessageCache() ) { if ( $html ) { $msg = 'dberrortext'; $sql = htmlspecialchars( $this->getSQL() ); $fname = htmlspecialchars( $this->fname ); $error = htmlspecialchars( $this->error ); } else { $msg = 'dberrortextcl'; $sql = $this->getSQL(); $fname = $this->fname; $error = $this->error; } return wfMessage( $msg )->rawParams( $sql, $fname, $this->errno, $error )->text(); } else { return parent::getContentMessage( $html ); } } /** * @return String */ function getSQL() { global $wgShowSQLErrors; if ( !$wgShowSQLErrors ) { return $this->msg( 'sqlhidden', 'SQL hidden' ); } else { return $this->sql; } } /** * @return bool */ function getLogMessage() { # Don't send to the exception log return false; } /** * @return String */ function getPageTitle() { return $this->msg( 'databaseerror', 'Database error' ); } } /** * @ingroup Database */ class DBUnexpectedError extends DBError {}