<?php
+/**
+ * Functions to be used with PHP's output buffer.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ * http://www.gnu.org/copyleft/gpl.html
+ *
+ * @file
+ */
/**
* Standard output handler for use with ob_start
+ *
+ * @param $s string
+ *
+ * @return string
*/
function wfOutputHandler( $s ) {
- global $wgDisableOutputCompression;
+ global $wgDisableOutputCompression, $wgValidateAllHtml;
$s = wfMangleFlashPolicy( $s );
+ if ( $wgValidateAllHtml ) {
+ $headers = apache_response_headers();
+ $isHTML = true;
+ foreach ( $headers as $name => $value ) {
+ if ( strtolower( $name ) == 'content-type' && strpos( $value, 'text/html' ) === false && strpos( $value, 'application/xhtml+xml' ) === false ) {
+ $isHTML = false;
+ break;
+ }
+ }
+ if ( $isHTML ) {
+ $s = wfHtmlValidationHandler( $s );
+ }
+ }
if ( !$wgDisableOutputCompression && !ini_get( 'zlib.output_compression' ) ) {
if ( !defined( 'MW_NO_OUTPUT_COMPRESSION' ) ) {
$s = wfGzipHandler( $s );
* the currently-requested URL.
* This isn't on WebRequest because we need it when things aren't initialized
* @private
+ *
+ * @return string
*/
function wfRequestExtension() {
- /// @fixme -- this sort of dupes some code in WebRequest::getRequestUrl()
+ /// @todo FIXME: this sort of dupes some code in WebRequest::getRequestUrl()
if( isset( $_SERVER['REQUEST_URI'] ) ) {
// Strip the query string...
list( $path ) = explode( '?', $_SERVER['REQUEST_URI'], 2 );
// Can't get the path from the server? :(
return '';
}
-
+
$period = strrpos( $path, '.' );
if( $period !== false ) {
return strtolower( substr( $path, $period ) );
/**
* Handler that compresses data with gzip if allowed by the Accept header.
* Unlike ob_gzhandler, it works for HEAD requests too.
+ *
+ * @param $s string
+ *
+ * @return string
*/
function wfGzipHandler( $s ) {
- if( !function_exists( 'gzencode' ) || headers_sent() ) {
+ if( !function_exists( 'gzencode' ) ) {
+ wfDebug( __FUNCTION__ . "() skipping compression (gzencode unavaible)\n" );
+ return $s;
+ }
+ if( headers_sent() ) {
+ wfDebug( __FUNCTION__ . "() skipping compression (headers already sent)\n" );
return $s;
}
-
+
$ext = wfRequestExtension();
if( $ext == '.gz' || $ext == '.tgz' ) {
// Don't do gzip compression if the URL path ends in .gz or .tgz
// Bad Safari! Bad!
return $s;
}
-
- if( isset( $_SERVER['HTTP_ACCEPT_ENCODING'] ) ) {
- $tokens = preg_split( '/[,; ]/', $_SERVER['HTTP_ACCEPT_ENCODING'] );
- if ( in_array( 'gzip', $tokens ) ) {
- header( 'Content-Encoding: gzip' );
- $s = gzencode( $s, 3 );
- }
+
+ if( wfClientAcceptsGzip() ) {
+ wfDebug( __FUNCTION__ . "() is compressing output\n" );
+ header( 'Content-Encoding: gzip' );
+ $s = gzencode( $s, 6 );
}
-
+
// Set vary header if it hasn't been set already
$headers = headers_list();
$foundVary = false;
}
if ( !$foundVary ) {
header( 'Vary: Accept-Encoding' );
+ global $wgUseXVO;
+ if ( $wgUseXVO ) {
+ header( 'X-Vary-Options: Accept-Encoding;list-contains=gzip' );
+ }
}
return $s;
}
/**
* Mangle flash policy tags which open up the site to XSS attacks.
+ *
+ * @param $s string
+ *
+ * @return string
*/
function wfMangleFlashPolicy( $s ) {
- return preg_replace( '/\<\s*cross-domain-policy\s*\>/i', '<NOT-cross-domain-policy>', $s );
+ # Avoid weird excessive memory usage in PCRE on big articles
+ if ( preg_match( '/\<\s*cross-domain-policy\s*\>/i', $s ) ) {
+ return preg_replace( '/\<\s*cross-domain-policy\s*\>/i', '<NOT-cross-domain-policy>', $s );
+ } else {
+ return $s;
+ }
}
/**
* Add a Content-Length header if possible. This makes it cooperate with squid better.
+ *
+ * @param $length int
*/
function wfDoContentLength( $length ) {
if ( !headers_sent() && $_SERVER['SERVER_PROTOCOL'] == 'HTTP/1.0' ) {
}
}
+/**
+ * Replace the output with an error if the HTML is not valid
+ *
+ * @param $s string
+ *
+ * @return string
+ */
+function wfHtmlValidationHandler( $s ) {
+
+ $errors = '';
+ if ( MWTidy::checkErrors( $s, $errors ) ) {
+ return $s;
+ }
+
+ header( 'Cache-Control: no-cache' );
+ $out = <<<EOT
+<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
+<html xmlns="http://www.w3.org/1999/xhtml" lang="en" dir="ltr">
+<head>
+<title>HTML validation error</title>
+<style>
+.highlight { background-color: #ffc }
+li { white-space: pre }
+</style>
+</head>
+<body>
+<h1>HTML validation error</h1>
+<ul>
+EOT;
+
+ $error = strtok( $errors, "\n" );
+ $badLines = array();
+ while ( $error !== false ) {
+ if ( preg_match( '/^line (\d+)/', $error, $m ) ) {
+ $lineNum = intval( $m[1] );
+ $badLines[$lineNum] = true;
+ $out .= "<li><a href=\"#line-{$lineNum}\">" . htmlspecialchars( $error ) . "</a></li>\n";
+ }
+ $error = strtok( "\n" );
+ }
+
+ $out .= '</ul>';
+ $out .= '<pre>' . htmlspecialchars( $errors ) . '</pre>';
+ $out .= "<ol>\n";
+ $line = strtok( $s, "\n" );
+ $i = 1;
+ while ( $line !== false ) {
+ if ( isset( $badLines[$i] ) ) {
+ $out .= "<li class=\"highlight\" id=\"line-$i\">";
+ } else {
+ $out .= '<li>';
+ }
+ $out .= htmlspecialchars( $line ) . "</li>\n";
+ $line = strtok( "\n" );
+ $i++;
+ }
+ $out .= '</ol></body></html>';
+ return $out;
+}
dépôts / lhc / web / wiklou.git / blobdiff