mirror of
https://gerrit.wikimedia.org/r/mediawiki/extensions/ConfirmEdit
synced 2024-11-25 00:26:06 +00:00
671 lines
18 KiB
PHP
671 lines
18 KiB
PHP
<?php
|
|
|
|
class ConfirmEditHooks {
|
|
static function getInstance() {
|
|
global $wgCaptcha, $wgCaptchaClass, $wgExtensionMessagesFiles;
|
|
static $done = false;
|
|
if ( !$done ) {
|
|
$done = true;
|
|
wfLoadExtensionMessages( 'ConfirmEdit' );
|
|
if ( isset( $wgExtensionMessagesFiles[$wgCaptchaClass] ) ) {
|
|
wfLoadExtensionMessages( $wgCaptchaClass );
|
|
}
|
|
$wgCaptcha = new $wgCaptchaClass;
|
|
}
|
|
return $wgCaptcha;
|
|
}
|
|
|
|
static function confirmEdit( &$editPage, $newtext, $section ) {
|
|
return self::getInstance()->confirmEdit( $editPage, $newtext, $section );
|
|
}
|
|
|
|
static function confirmEditMerged( &$editPage, $newtext ) {
|
|
return self::getInstance()->confirmEditMerged( $editPage, $newtext );
|
|
}
|
|
|
|
static function injectUserCreate( &$template ) {
|
|
return self::getInstance()->injectUserCreate( $template );
|
|
}
|
|
|
|
static function confirmUserCreate( $u, &$message ) {
|
|
return self::getInstance()->confirmUserCreate( $u, $message );
|
|
}
|
|
|
|
static function triggerUserLogin( $user, $password, $retval ) {
|
|
return self::getInstance()->triggerUserLogin( $user, $password, $retval );
|
|
}
|
|
|
|
static function injectUserLogin( &$template ) {
|
|
return self::getInstance()->injectUserLogin( $template );
|
|
}
|
|
|
|
static function confirmUserLogin( $u, $pass, &$retval ) {
|
|
return self::getInstance()->confirmUserLogin( $u, $pass, $retval );
|
|
}
|
|
}
|
|
|
|
class CaptchaSpecialPage extends UnlistedSpecialPage {
|
|
function execute( $par ) {
|
|
$this->setHeaders();
|
|
$instance = ConfirmEditHooks::getInstance();
|
|
switch( $par ) {
|
|
case "image":
|
|
return $instance->showImage();
|
|
case "help":
|
|
default:
|
|
return $instance->showHelp();
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
class SimpleCaptcha {
|
|
function SimpleCaptcha() {
|
|
global $wgCaptchaStorageClass;
|
|
$this->storage = new $wgCaptchaStorageClass;
|
|
}
|
|
|
|
/**
|
|
* Insert a captcha prompt into the edit form.
|
|
* This sample implementation generates a simple arithmetic operation;
|
|
* it would be easy to defeat by machine.
|
|
*
|
|
* Override this!
|
|
*
|
|
* @return string HTML
|
|
*/
|
|
function getForm() {
|
|
$a = mt_rand(0, 100);
|
|
$b = mt_rand(0, 10);
|
|
$op = mt_rand(0, 1) ? '+' : '-';
|
|
|
|
$test = "$a $op $b";
|
|
$answer = ($op == '+') ? ($a + $b) : ($a - $b);
|
|
|
|
$index = $this->storeCaptcha( array( 'answer' => $answer ) );
|
|
|
|
return "<p><label for=\"wpCaptchaWord\">$test</label> = " .
|
|
wfElement( 'input', array(
|
|
'name' => 'wpCaptchaWord',
|
|
'id' => 'wpCaptchaWord',
|
|
'tabindex' => 1 ) ) . // tab in before the edit textarea
|
|
"</p>\n" .
|
|
wfElement( 'input', array(
|
|
'type' => 'hidden',
|
|
'name' => 'wpCaptchaId',
|
|
'id' => 'wpCaptchaId',
|
|
'value' => $index ) );
|
|
}
|
|
|
|
/**
|
|
* Insert the captcha prompt into an edit form.
|
|
* @param OutputPage $out
|
|
*/
|
|
function editCallback( &$out ) {
|
|
$out->addWikiText( $this->getMessage( $this->action ) );
|
|
$out->addHTML( $this->getForm() );
|
|
}
|
|
|
|
/**
|
|
* Show a message asking the user to enter a captcha on edit
|
|
* The result will be treated as wiki text
|
|
*
|
|
* @param $action Action being performed
|
|
* @return string
|
|
*/
|
|
function getMessage( $action ) {
|
|
$name = 'captcha-' . $action;
|
|
$text = wfMsg( $name );
|
|
# Obtain a more tailored message, if possible, otherwise, fall back to
|
|
# the default for edits
|
|
return wfEmptyMsg( $name, $text ) ? wfMsg( 'captcha-edit' ) : $text;
|
|
}
|
|
|
|
/**
|
|
* Inject whazawhoo
|
|
* @fixme if multiple thingies insert a header, could break
|
|
* @param SimpleTemplate $template
|
|
* @return bool true to keep running callbacks
|
|
*/
|
|
function injectUserCreate( &$template ) {
|
|
global $wgCaptchaTriggers, $wgOut;
|
|
if( $wgCaptchaTriggers['createaccount'] ) {
|
|
$template->set( 'header',
|
|
"<div class='captcha'>" .
|
|
$wgOut->parse( $this->getMessage( 'createaccount' ) ) .
|
|
$this->getForm() .
|
|
"</div>\n" );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Inject a captcha into the user login form after a failed
|
|
* password attempt as a speedbump for mass attacks.
|
|
* @fixme if multiple thingies insert a header, could break
|
|
* @param SimpleTemplate $template
|
|
* @return bool true to keep running callbacks
|
|
*/
|
|
function injectUserLogin( &$template ) {
|
|
if( $this->isBadLoginTriggered() ) {
|
|
global $wgOut;
|
|
$template->set( 'header',
|
|
"<div class='captcha'>" .
|
|
$wgOut->parse( $this->getMessage( 'badlogin' ) ) .
|
|
$this->getForm() .
|
|
"</div>\n" );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* When a bad login attempt is made, increment an expiring counter
|
|
* in the memcache cloud. Later checks for this may trigger a
|
|
* captcha display to prevent too many hits from the same place.
|
|
* @param User $user
|
|
* @param string $password
|
|
* @param int $retval authentication return value
|
|
* @return bool true to keep running callbacks
|
|
*/
|
|
function triggerUserLogin( $user, $password, $retval ) {
|
|
global $wgCaptchaTriggers, $wgCaptchaBadLoginExpiration, $wgMemc;
|
|
if( $retval == LoginForm::WRONG_PASS && $wgCaptchaTriggers['badlogin'] ) {
|
|
$key = $this->badLoginKey();
|
|
$count = $wgMemc->get( $key );
|
|
if( !$count ) {
|
|
$wgMemc->add( $key, 0, $wgCaptchaBadLoginExpiration );
|
|
}
|
|
$count = $wgMemc->incr( $key );
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Check if a bad login has already been registered for this
|
|
* IP address. If so, require a captcha.
|
|
* @return bool
|
|
* @access private
|
|
*/
|
|
function isBadLoginTriggered() {
|
|
global $wgMemc;
|
|
return intval( $wgMemc->get( $this->badLoginKey() ) ) > 0;
|
|
}
|
|
|
|
/**
|
|
* Internal cache key for badlogin checks.
|
|
* @return string
|
|
* @access private
|
|
*/
|
|
function badLoginKey() {
|
|
return wfMemcKey( 'captcha', 'badlogin', 'ip', wfGetIP() );
|
|
}
|
|
|
|
/**
|
|
* Check if the submitted form matches the captcha session data provided
|
|
* by the plugin when the form was generated.
|
|
*
|
|
* Override this!
|
|
*
|
|
* @param string $answer
|
|
* @param array $info
|
|
* @return bool
|
|
*/
|
|
function keyMatch( $answer, $info ) {
|
|
return $answer == $info['answer'];
|
|
}
|
|
|
|
// ----------------------------------
|
|
|
|
/**
|
|
* @param EditPage $editPage
|
|
* @param string $action (edit/create/addurl...)
|
|
* @return bool true if action triggers captcha on editPage's namespace
|
|
*/
|
|
function captchaTriggers( &$editPage, $action) {
|
|
global $wgCaptchaTriggers, $wgCaptchaTriggersOnNamespace;
|
|
//Special config for this NS?
|
|
if (isset( $wgCaptchaTriggersOnNamespace[$editPage->mTitle->getNamespace()][$action] ) )
|
|
return $wgCaptchaTriggersOnNamespace[$editPage->mTitle->getNamespace()][$action];
|
|
|
|
return ( !empty( $wgCaptchaTriggers[$action] ) ); //Default
|
|
}
|
|
|
|
|
|
/**
|
|
* @param EditPage $editPage
|
|
* @param string $newtext
|
|
* @param string $section
|
|
* @return bool true if the captcha should run
|
|
*/
|
|
function shouldCheck( &$editPage, $newtext, $section, $merged = false ) {
|
|
$this->trigger = '';
|
|
$title = $editPage->mArticle->getTitle();
|
|
|
|
global $wgUser;
|
|
if( $wgUser->isAllowed( 'skipcaptcha' ) ) {
|
|
wfDebug( "ConfirmEdit: user group allows skipping captcha\n" );
|
|
return false;
|
|
}
|
|
global $wgCaptchaWhitelistIP;
|
|
if( !empty( $wgCaptchaWhitelistIP ) ) {
|
|
$ip = wfGetIp();
|
|
foreach ( $wgCaptchaWhitelistIP as $range ) {
|
|
if ( IP::isInRange( $ip, $range ) ) {
|
|
return false;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
global $wgEmailAuthentication, $ceAllowConfirmedEmail;
|
|
if( $wgEmailAuthentication && $ceAllowConfirmedEmail &&
|
|
$wgUser->isEmailConfirmed() ) {
|
|
wfDebug( "ConfirmEdit: user has confirmed mail, skipping captcha\n" );
|
|
return false;
|
|
}
|
|
|
|
if( $this->captchaTriggers( $editPage, 'edit' ) ) {
|
|
// Check on all edits
|
|
global $wgUser;
|
|
$this->trigger = sprintf( "edit trigger by '%s' at [[%s]]",
|
|
$wgUser->getName(),
|
|
$title->getPrefixedText() );
|
|
$this->action = 'edit';
|
|
wfDebug( "ConfirmEdit: checking all edits...\n" );
|
|
return true;
|
|
}
|
|
|
|
if( $this->captchaTriggers( $editPage, 'create' ) && !$editPage->mTitle->exists() ) {
|
|
//Check if creating a page
|
|
global $wgUser;
|
|
$this->trigger = sprintf( "Create trigger by '%s' at [[%s]]",
|
|
$wgUser->getName(),
|
|
$title->getPrefixedText() );
|
|
$this->action = 'create';
|
|
wfDebug( "ConfirmEdit: checking on page creation...\n" );
|
|
return true;
|
|
}
|
|
|
|
if( $this->captchaTriggers( $editPage, 'addurl' ) ) {
|
|
// Only check edits that add URLs
|
|
if ( $merged ) {
|
|
// Get links from the database
|
|
$oldLinks = $this->getLinksFromTracker( $title );
|
|
// Share a parse operation with Article::doEdit()
|
|
$editInfo = $editPage->mArticle->prepareTextForEdit( $newtext );
|
|
$newLinks = array_keys( $editInfo->output->getExternalLinks() );
|
|
} else {
|
|
// Get link changes in the slowest way known to man
|
|
$oldtext = $this->loadText( $editPage, $section );
|
|
$oldLinks = $this->findLinks( $oldtext );
|
|
$newLinks = $this->findLinks( $newtext );
|
|
}
|
|
|
|
$unknownLinks = array_filter( $newLinks, array( &$this, 'filterLink' ) );
|
|
$addedLinks = array_diff( $unknownLinks, $oldLinks );
|
|
$numLinks = count( $addedLinks );
|
|
|
|
if( $numLinks > 0 ) {
|
|
global $wgUser;
|
|
$this->trigger = sprintf( "%dx url trigger by '%s' at [[%s]]: %s",
|
|
$numLinks,
|
|
$wgUser->getName(),
|
|
$title->getPrefixedText(),
|
|
implode( ", ", $addedLinks ) );
|
|
$this->action = 'addurl';
|
|
return true;
|
|
}
|
|
}
|
|
|
|
global $wgCaptchaRegexes;
|
|
if( !empty( $wgCaptchaRegexes ) ) {
|
|
// Custom regex checks
|
|
$oldtext = $this->loadText( $editPage, $section );
|
|
|
|
foreach( $wgCaptchaRegexes as $regex ) {
|
|
$newMatches = array();
|
|
if( preg_match_all( $regex, $newtext, $newMatches ) ) {
|
|
$oldMatches = array();
|
|
preg_match_all( $regex, $oldtext, $oldMatches );
|
|
|
|
$addedMatches = array_diff( $newMatches[0], $oldMatches[0] );
|
|
|
|
$numHits = count( $addedMatches );
|
|
if( $numHits > 0 ) {
|
|
global $wgUser;
|
|
$this->trigger = sprintf( "%dx %s at [[%s]]: %s",
|
|
$numHits,
|
|
$regex,
|
|
$wgUser->getName(),
|
|
$title->getPrefixedText(),
|
|
implode( ", ", $addedMatches ) );
|
|
$this->action = 'edit';
|
|
return true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return false;
|
|
}
|
|
|
|
/**
|
|
* Filter callback function for URL whitelisting
|
|
* @param string url to check
|
|
* @return bool true if unknown, false if whitelisted
|
|
* @access private
|
|
*/
|
|
function filterLink( $url ) {
|
|
global $wgCaptchaWhitelist;
|
|
$source = wfMsgForContent( 'captcha-addurl-whitelist' );
|
|
|
|
$whitelist = wfEmptyMsg( 'captcha-addurl-whitelist', $source )
|
|
? false
|
|
: $this->buildRegexes( explode( "\n", $source ) );
|
|
|
|
$cwl = $wgCaptchaWhitelist !== false ? preg_match( $wgCaptchaWhitelist, $url ) : false;
|
|
$wl = $whitelist !== false ? preg_match( $whitelist, $url ) : false;
|
|
|
|
return !( $cwl || $wl );
|
|
}
|
|
|
|
/**
|
|
* Build regex from whitelist
|
|
* @param string lines from [[MediaWiki:Captcha-addurl-whitelist]]
|
|
* @return string Regex or bool false if whitelist is empty
|
|
* @access private
|
|
*/
|
|
function buildRegexes( $lines ) {
|
|
# Code duplicated from the SpamBlacklist extension (r19197)
|
|
|
|
# Strip comments and whitespace, then remove blanks
|
|
$lines = array_filter( array_map( 'trim', preg_replace( '/#.*$/', '', $lines ) ) );
|
|
|
|
# No lines, don't make a regex which will match everything
|
|
if ( count( $lines ) == 0 ) {
|
|
wfDebug( "No lines\n" );
|
|
return false;
|
|
} else {
|
|
# Make regex
|
|
# It's faster using the S modifier even though it will usually only be run once
|
|
//$regex = 'http://+[a-z0-9_\-.]*(' . implode( '|', $lines ) . ')';
|
|
//return '/' . str_replace( '/', '\/', preg_replace('|\\\*/|', '/', $regex) ) . '/Si';
|
|
$regexes = '';
|
|
$regexStart = '/http:\/\/+[a-z0-9_\-.]*(';
|
|
$regexEnd = ')/Si';
|
|
$regexMax = 4096;
|
|
$build = false;
|
|
foreach( $lines as $line ) {
|
|
// FIXME: not very robust size check, but should work. :)
|
|
if( $build === false ) {
|
|
$build = $line;
|
|
} elseif( strlen( $build ) + strlen( $line ) > $regexMax ) {
|
|
$regexes .= $regexStart .
|
|
str_replace( '/', '\/', preg_replace('|\\\*/|', '/', $build) ) .
|
|
$regexEnd;
|
|
$build = $line;
|
|
} else {
|
|
$build .= '|' . $line;
|
|
}
|
|
}
|
|
if( $build !== false ) {
|
|
$regexes .= $regexStart .
|
|
str_replace( '/', '\/', preg_replace('|\\\*/|', '/', $build) ) .
|
|
$regexEnd;
|
|
}
|
|
return $regexes;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Load external links from the externallinks table
|
|
*/
|
|
function getLinksFromTracker( $title ) {
|
|
$dbr =& wfGetDB( DB_SLAVE );
|
|
$id = $title->getArticleId(); // should be zero queries
|
|
$res = $dbr->select( 'externallinks', array( 'el_to' ),
|
|
array( 'el_from' => $id ), __METHOD__ );
|
|
$links = array();
|
|
while ( $row = $dbr->fetchObject( $res ) ) {
|
|
$links[] = $row->el_to;
|
|
}
|
|
return $links;
|
|
}
|
|
|
|
/**
|
|
* The main callback run on edit attempts.
|
|
* @param EditPage $editPage
|
|
* @param string $newtext
|
|
* @param string $section
|
|
* @param bool true to continue saving, false to abort and show a captcha form
|
|
*/
|
|
function confirmEdit( &$editPage, $newtext, $section, $merged = false ) {
|
|
if( $this->shouldCheck( $editPage, $newtext, $section, $merged ) ) {
|
|
if( $this->passCaptcha() ) {
|
|
return true;
|
|
} else {
|
|
$editPage->showEditForm( array( &$this, 'editCallback' ) );
|
|
return false;
|
|
}
|
|
} else {
|
|
wfDebug( "ConfirmEdit: no need to show captcha.\n" );
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* A more efficient edit filter callback based on the text after section merging
|
|
* @param EditPage $editPage
|
|
* @param string $newtext
|
|
*/
|
|
function confirmEditMerged( &$editPage, $newtext ) {
|
|
return $this->confirmEdit( $editPage, $newtext, false, true );
|
|
}
|
|
|
|
/**
|
|
* Hook for user creation form submissions.
|
|
* @param User $u
|
|
* @param string $message
|
|
* @return bool true to continue, false to abort user creation
|
|
*/
|
|
function confirmUserCreate( $u, &$message ) {
|
|
global $wgCaptchaTriggers;
|
|
if( $wgCaptchaTriggers['createaccount'] ) {
|
|
$this->trigger = "new account '" . $u->getName() . "'";
|
|
if( !$this->passCaptcha() ) {
|
|
$message = wfMsg( 'captcha-createaccount-fail' );
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Hook for user login form submissions.
|
|
* @param User $u
|
|
* @param string $message
|
|
* @return bool true to continue, false to abort user creation
|
|
*/
|
|
function confirmUserLogin( $u, $pass, &$retval ) {
|
|
if( $this->isBadLoginTriggered() ) {
|
|
$this->trigger = "post-badlogin login '" . $u->getName() . "'";
|
|
if( !$this->passCaptcha() ) {
|
|
$message = wfMsg( 'captcha-badlogin-fail' );
|
|
// Emulate a bad-password return to confuse the shit out of attackers
|
|
$retval = LoginForm::WRONG_PASS;
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
/**
|
|
* Given a required captcha run, test form input for correct
|
|
* input on the open session.
|
|
* @return bool if passed, false if failed or new session
|
|
*/
|
|
function passCaptcha() {
|
|
$info = $this->retrieveCaptcha();
|
|
if( $info ) {
|
|
global $wgRequest;
|
|
if( $this->keyMatch( $wgRequest->getVal('wpCaptchaWord'), $info ) ) {
|
|
$this->log( "passed" );
|
|
$this->clearCaptcha( $info );
|
|
return true;
|
|
} else {
|
|
$this->clearCaptcha( $info );
|
|
$this->log( "bad form input" );
|
|
return false;
|
|
}
|
|
} else {
|
|
$this->log( "new captcha session" );
|
|
return false;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Log the status and any triggering info for debugging or statistics
|
|
* @param string $message
|
|
*/
|
|
function log( $message ) {
|
|
wfDebugLog( 'captcha', 'ConfirmEdit: ' . $message . '; ' . $this->trigger );
|
|
}
|
|
|
|
/**
|
|
* Generate a captcha session ID and save the info in PHP's session storage.
|
|
* (Requires the user to have cookies enabled to get through the captcha.)
|
|
*
|
|
* A random ID is used so legit users can make edits in multiple tabs or
|
|
* windows without being unnecessarily hobbled by a serial order requirement.
|
|
* Pass the returned id value into the edit form as wpCaptchaId.
|
|
*
|
|
* @param array $info data to store
|
|
* @return string captcha ID key
|
|
*/
|
|
function storeCaptcha( $info ) {
|
|
if( !isset( $info['index'] ) ) {
|
|
// Assign random index if we're not udpating
|
|
$info['index'] = strval( mt_rand() );
|
|
}
|
|
$this->storage->store( $info['index'], $info );
|
|
return $info['index'];
|
|
}
|
|
|
|
/**
|
|
* Fetch this session's captcha info.
|
|
* @return mixed array of info, or false if missing
|
|
*/
|
|
function retrieveCaptcha() {
|
|
global $wgRequest;
|
|
$index = $wgRequest->getVal( 'wpCaptchaId' );
|
|
return $this->storage->retrieve( $index );
|
|
}
|
|
|
|
/**
|
|
* Clear out existing captcha info from the session, to ensure
|
|
* it can't be reused.
|
|
*/
|
|
function clearCaptcha( $info ) {
|
|
$this->storage->clear( $info['index'] );
|
|
}
|
|
|
|
/**
|
|
* Retrieve the current version of the page or section being edited...
|
|
* @param EditPage $editPage
|
|
* @param string $section
|
|
* @return string
|
|
* @access private
|
|
*/
|
|
function loadText( $editPage, $section ) {
|
|
$rev = Revision::newFromTitle( $editPage->mTitle );
|
|
if( is_null( $rev ) ) {
|
|
return "";
|
|
} else {
|
|
$text = $rev->getText();
|
|
if( $section != '' ) {
|
|
return Article::getSection( $text, $section );
|
|
} else {
|
|
return $text;
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* Extract a list of all recognized HTTP links in the text.
|
|
* @param string $text
|
|
* @return array of strings
|
|
*/
|
|
function findLinks( $text ) {
|
|
global $wgParser, $wgTitle, $wgUser;
|
|
|
|
$options = new ParserOptions();
|
|
$text = $wgParser->preSaveTransform( $text, $wgTitle, $wgUser, $options );
|
|
$out = $wgParser->parse( $text, $wgTitle, $options );
|
|
|
|
return array_keys( $out->getExternalLinks() );
|
|
}
|
|
|
|
/**
|
|
* Show a page explaining what this wacky thing is.
|
|
*/
|
|
function showHelp() {
|
|
global $wgOut, $ceAllowConfirmedEmail;
|
|
$wgOut->setPageTitle( wfMsg( 'captchahelp-title' ) );
|
|
$wgOut->addWikiText( wfMsg( 'captchahelp-text' ) );
|
|
if ( $this->storage->cookiesNeeded() ) {
|
|
$wgOut->addWikiText( wfMsg( 'captchahelp-cookies-needed' ) );
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
class CaptchaSessionStore {
|
|
function store( $index, $info ) {
|
|
$_SESSION['captcha' . $info['index']] = $info;
|
|
}
|
|
|
|
function retrieve( $index ) {
|
|
if( isset( $_SESSION['captcha' . $index] ) ) {
|
|
return $_SESSION['captcha' . $index];
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function clear( $index ) {
|
|
unset( $_SESSION['captcha' . $index] );
|
|
}
|
|
|
|
function cookiesNeeded() {
|
|
return true;
|
|
}
|
|
}
|
|
|
|
class CaptchaCacheStore {
|
|
function store( $index, $info ) {
|
|
global $wgMemc, $wgCaptchaSessionExpiration;
|
|
$wgMemc->set( wfMemcKey( 'captcha', $index ), $info,
|
|
$wgCaptchaSessionExpiration );
|
|
}
|
|
|
|
function retrieve( $index ) {
|
|
global $wgMemc;
|
|
$info = $wgMemc->get( wfMemcKey( 'captcha', $index ) );
|
|
if( $info ) {
|
|
return $info;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
function clear( $index ) {
|
|
global $wgMemc;
|
|
$wgMemc->delete( wfMemcKey( 'captcha', $index ) );
|
|
}
|
|
|
|
function cookiesNeeded() {
|
|
return false;
|
|
}
|
|
}
|
|
|