Alexia has uploaded a new change for review.
https://gerrit.wikimedia.org/r/296264
Change subject: Replace eval modifier with callbacks.
......................................................................
Replace eval modifier with callbacks.
Change-Id: I9fde8ed91aec6f11d193b4f02c5b5d2d200c05df
---
M RegexFunctions.php
1 file changed, 41 insertions(+), 45 deletions(-)
git pull ssh://gerrit.wikimedia.org:29418/mediawiki/extensions/RegexFunctions
refs/changes/64/296264/1
diff --git a/RegexFunctions.php b/RegexFunctions.php
index fc1781f..144ef80 100644
--- a/RegexFunctions.php
+++ b/RegexFunctions.php
@@ -36,11 +36,7 @@
// how many functions are allowed in a single page? Keep this at least above 3
for usability
$wgRegexFunctionsPerPage = 10;
// should we allow modifiers in the functions, e.g. the /i modifier for
case-insensitive?
-// This does NOT enable the /e modifier for preg_replace, see the next
variable for that
$wgRegexFunctionsAllowModifiers = true;
-// should we allow the /e modifier in preg_replace? Requires AllowModifiers to
be true.
-// Don't enable this unless you trust every single editor on your wiki, as it
may open up potential XSS vectors
-$wgRegexFunctionsAllowE = false;
// should we allow internal options to be set (e.g. (?opts) or (?opts:some
regex))
$wgRegexFunctionsAllowOptions = true;
// limit for rsplit and rreplace functions. -1 is unlimited
@@ -49,6 +45,7 @@
$wgRegexFunctionsDisable = array();
class ExtRegexFunctions {
+ public static $rmatches; //Holder for rmatch's matches to pass into
closure callback function.
private static $num = 0;
private static $modifiers = array(
'i', 'm', 's', 'x', 'A', 'D', 'S', 'U', 'X', 'J', 'u', 'e'
@@ -78,40 +75,39 @@
}
$pattern = self::sanitize(
$pattern,
- $wgRegexFunctionsAllowModifiers,
- false
+ $wgRegexFunctionsAllowModifiers
);
$num = preg_match(
$pattern, $string, $matches, PREG_OFFSET_CAPTURE, (int)
$offset
);
- if( $num === false ) {
+ if ( $num === false ) {
return;
}
- if( $num === 0 ) {
+ if ( $num === 0 ) {
+ if ( $notfound == '$0' ) {
+ //Return the original string if specified to
display it with $0.
+ return $string;
+ }
return $notfound;
}
+ self::$rmatches = $matches;
// change all backslashes to $
$return = str_replace( '\\', '%$', $return );
- $return = preg_replace(
- '/%?\$%?\$([0-9]+)/e',
- 'array_key_exists($1, $matches) ? $matches[$1][1] :
\'\'',
- $return
- );
- $return = preg_replace(
- '/%?\$%?\$\{([0-9]+)\}/e',
- 'array_key_exists($1, $matches) ? $matches[$1][1] :
\'\'',
- $return
- );
- $return = preg_replace(
- '/%?\$([0-9]+)/e',
- 'array_key_exists($1, $matches) ? $matches[$1][0] :
\'\'',
- $return
- );
- $return = preg_replace(
- '/%?\$\{([0-9]+)\}/e',
- 'array_key_exists($1, $matches) ? $matches[$1][0] :
\'\'',
- $return
- );
+ $slashyReplacements = [
+ '/%?\$%?\$([0-9]+)/',
+ '/%?\$%?\$\{([0-9]+)\}/',
+ '/%?\$([0-9]+)/',
+ '/%?\$\{([0-9]+)\}/'
+ ];
+ foreach ( $slashyReplacements as $regex ) {
+ $return = preg_replace_callback(
+ $regex,
+ function ( $_matches ) {
+ return array_key_exists($_matches[1],
ExtRegexFunctions::$rmatches) ? ExtRegexFunctions::$rmatches[$_matches[1]][0] :
'';
+ },
+ $return
+ );
+ }
$return = str_replace( '%$', '\\', $return );
return $return;
}
@@ -127,8 +123,7 @@
}
$pattern = self::sanitize(
$pattern,
- $wgRegexFunctionsAllowModifiers,
- false
+ $wgRegexFunctionsAllowModifiers
);
$res = preg_split( $pattern, $string, $wgRegexFunctionsLimit );
$p = (int) $piece;
@@ -147,7 +142,7 @@
}
public static function rreplace( &$parser, $string = '', $pattern = '',
$replace = '' ) {
- global $wgRegexFunctionsPerPage,
$wgRegexFunctionsAllowModifiers, $wgRegexFunctionsAllowE,
$wgRegexFunctionsLimit, $wgRegexFunctionsDisable;
+ global $wgRegexFunctionsPerPage,
$wgRegexFunctionsAllowModifiers, $wgRegexFunctionsLimit,
$wgRegexFunctionsDisable;
if( in_array( 'rreplace', $wgRegexFunctionsDisable ) ) {
return;
}
@@ -157,8 +152,7 @@
}
$pattern = self::sanitize(
str_replace(chr(0), '', $pattern),
- $wgRegexFunctionsAllowModifiers,
- $wgRegexFunctionsAllowE
+ $wgRegexFunctionsAllowModifiers
);
$res = preg_replace(
$pattern,
@@ -170,11 +164,13 @@
}
// santizes a regex pattern
- private static function sanitize( $pattern, $m = false, $e = false ) {
+ private static function sanitize( $pattern, $m = false ) {
if( preg_match( '/^\/(.*)([^\\\\])\/(.*?)$/', $pattern,
$matches ) ) {
- $pat = preg_replace(
- '/([^\\\\])?\(\?(.*\:)?(.*)\)/Ue',
- '\'$1(?\' . self::cleanupInternal(\'$2\') .
\'$3)\'',
+ $pat = preg_replace_callback(
+ '/([^\\\\])?\(\?(.*\:)?(.*)\)/U',
+ function ( $_matches ) {
+ return "{$_matches[1]}(" .
self::cleanupInternal( $_matches[2] ) . "{$_matches[3]})";
+ },
$matches[1] . $matches[2]
);
$ret = '/' . $pat . '/';
@@ -185,15 +181,15 @@
$mod .= $val;
}
}
- if( !$e ) {
- $mod = str_replace( 'e', '', $mod );
- }
+ $mod = str_replace( 'e', '', $mod ); //Get rid
of eval modifier.
$ret .= $mod;
}
} else {
- $pat = preg_replace(
- '/([^\\\\])?\(\?(.*\:)?(.*)\)/Ue',
- '\'$1(?\' . self::cleanupInternal(\'$2\') .
\'$3)\'',
+ $pat = preg_replace_callback(
+ '/([^\\\\])?\(\?(.*\:)?(.*)\)/U',
+ function ( $_matches ) {
+ return "{$_matches[1]}(" .
self::cleanupInternal( $_matches[2] ) . "{$_matches[3]})";
+ },
$pattern
);
$pat = preg_replace( '!([^\\\\])/!', '$1\\/', $pat );
@@ -206,10 +202,10 @@
private static function cleanupInternal( $str ) {
global $wgRegexFunctionsAllowOptions;
$ret = '';
- if( !$wgRegexFunctionsAllowOptions ) {
+ if ( !$wgRegexFunctionsAllowOptions ) {
return '';
}
- foreach( self::$options as $opt ) {
+ foreach ( self::$options as $opt ) {
if( strpos( $str, $opt ) !== false ) {
$ret .= $opt;
}
--
To view, visit https://gerrit.wikimedia.org/r/296264
To unsubscribe, visit https://gerrit.wikimedia.org/r/settings
Gerrit-MessageType: newchange
Gerrit-Change-Id: I9fde8ed91aec6f11d193b4f02c5b5d2d200c05df
Gerrit-PatchSet: 1
Gerrit-Project: mediawiki/extensions/RegexFunctions
Gerrit-Branch: master
Gerrit-Owner: Alexia <was...@gmail.com>
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