'. ''.$text.''; # Tidy is known to clobber tabs; convert them to entities $wrappedtext = str_replace( "\t", ' ', $wrappedtext ); if( $wgTidyInternal ) { $correctedtext = self::execInternalTidy( $wrappedtext ); } else { $correctedtext = self::execExternalTidy( $wrappedtext ); } if( is_null( $correctedtext ) ) { wfDebug( "Tidy error detected!\n" ); return $text . "\n\n"; } # Convert the tabs back from entities $correctedtext = str_replace( ' ', "\t", $correctedtext ); return $correctedtext; } /** * Check HTML for errors, used if $wgValidateAllHtml = true. * * @param $text String * @param &$errorStr String: return the error string * @return Boolean: whether the HTML is valid */ public static function checkErrors( $text, &$errorStr = null ) { global $wgTidyInternal; $retval = 0; if( $wgTidyInternal ) { $errorStr = self::execInternalTidy( $text, true, $retval ); } else { $errorStr = self::execExternalTidy( $text, true, $retval ); } return ( $retval < 0 && $errorStr == '' ) || $retval == 0; } /** * Spawn an external HTML tidy process and get corrected markup back from it. * Also called in OutputHandler.php for full page validation * * @param $text String: HTML to check * @param $stderr Boolean: Whether to read from STDERR rather than STDOUT * @param &$retval Exit code (-1 on internal error) * @retrun mixed String or null */ private static function execExternalTidy( $text, $stderr = false, &$retval = null ) { global $wgTidyConf, $wgTidyBin, $wgTidyOpts; wfProfileIn( __METHOD__ ); $cleansource = ''; $opts = ' -utf8'; if( $stderr ) { $descriptorspec = array( 0 => array( 'pipe', 'r' ), 1 => array( 'file', wfGetNull(), 'a' ), 2 => array( 'pipe', 'w' ) ); } else { $descriptorspec = array( 0 => array( 'pipe', 'r' ), 1 => array( 'pipe', 'w' ), 2 => array( 'file', wfGetNull(), 'a' ) ); } $readpipe = $stderr ? 2 : 1; $pipes = array(); if( function_exists( 'proc_open' ) ) { $process = proc_open( "$wgTidyBin -config $wgTidyConf $wgTidyOpts$opts", $descriptorspec, $pipes ); if ( is_resource( $process ) ) { // Theoretically, this style of communication could cause a deadlock // here. If the stdout buffer fills up, then writes to stdin could // block. This doesn't appear to happen with tidy, because tidy only // writes to stdout after it's finished reading from stdin. Search // for tidyParseStdin and tidySaveStdout in console/tidy.c fwrite( $pipes[0], $text ); fclose( $pipes[0] ); while ( !feof( $pipes[$readpipe] ) ) { $cleansource .= fgets( $pipes[$readpipe], 1024 ); } fclose( $pipes[$readpipe] ); $retval = proc_close( $process ); } else { $retval = -1; } } else { $retval = -1; } wfProfileOut( __METHOD__ ); if( !$stderr && $cleansource == '' && $text != '' ) { // Some kind of error happened, so we couldn't get the corrected text. // Just give up; we'll use the source text and append a warning. return null; } else { return $cleansource; } } /** * Use the HTML tidy PECL extension to use the tidy library in-process, * saving the overhead of spawning a new process. * * 'pear install tidy' should be able to compile the extension module. */ private static function execInternalTidy( $text, $stderr = false, &$retval = null ) { global $wgTidyConf, $IP, $wgDebugTidy; wfProfileIn( __METHOD__ ); $tidy = new tidy; $tidy->parseString( $text, $wgTidyConf, 'utf8' ); if( $stderr ) { $retval = $tidy->getStatus(); return $tidy->errorBuffer; } else { $tidy->cleanRepair(); $retval = $tidy->getStatus(); if( $retval == 2 ) { // 2 is magic number for fatal error // http://www.php.net/manual/en/function.tidy-get-status.php $cleansource = null; } else { $cleansource = tidy_get_output( $tidy ); } if ( $wgDebugTidy && $retval > 0 ) { $cleansource .= "', '-->', $tidy->errorBuffer ) . "\n-->"; } wfProfileOut( __METHOD__ ); return $cleansource; } } }