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<?php
namespace SMW\MediaWiki\Specials;
use SMW\ApplicationFactory;
use SpecialPage;
use Title;
/**
* This class is the receiving endpoint for the `DeferredRequestDispatchManager` invoked
* job request.
*
* This special page is not expected to interact with a user and therefore it is
* unlisted.
*
* @license GNU GPL v2+
* @since 2.3
*
* @author mwjames
*/
class SpecialDeferredRequestDispatcher extends SpecialPage {
/**
* @var boolean
*/
private $allowedToModifyHttpHeader = true;
/**
* @codeCoverageIgnore
*/
public function __construct() {
parent::__construct( 'DeferredRequestDispatcher', '', false );
}
/**
* SpecialPage::doesWrites
*
* @return boolean
*/
public function doesWrites() {
return true;
}
/**
* @see SpecialPage::getGroupName
*/
protected function getGroupName() {
return 'maintenance';
}
/**
* Only used during unit testing
*
* @since 2.3
*/
public function disallowToModifyHttpHeader() {
$this->allowedToModifyHttpHeader = false;
}
/**
* @since 2.3
*
* @return string
*/
public static function getTargetURL() {
return SpecialPage::getTitleFor( 'DeferredRequestDispatcher')->getFullURL();
}
/**
* @since 2.3
*
* @param string $key
*
* @return string
*/
public static function getRequestToken( $key ) {
return md5( $key . $GLOBALS['wgSecretKey'] );
}
/**
* @see SpecialPage::execute
*/
public function execute( $query ) {
$this->getOutput()->disable();
if ( wfReadOnly() ) {
return $this->modifyHttpHeader( "HTTP/1.0 423 Locked", 'Wiki is in read-only mode.' );
}
if ( !$this->isHttpRequestMethod( 'HEAD' ) && !$this->isHttpRequestMethod( 'POST' ) ) {
return $this->modifyHttpHeader( "HTTP/1.0 400 Bad Request", 'The special page requires a POST/HEAD request.' );
}
$parameters = json_decode(
$this->getRequest()->getVal( 'parameters' ),
true
);
if ( $this->isHttpRequestMethod( 'POST' ) && self::getRequestToken( $parameters['timestamp'] ) !== $parameters['requestToken'] ) {
return $this->modifyHttpHeader( "HTTP/1.0 400 Bad Request", 'Invalid or staled requestToken was provided for the request' );
}
$this->modifyHttpHeader( "HTTP/1.0 202 Accepted" );
if ( !isset( $parameters['async-job'] ) ) {
return;
}
return $this->doRunJob( $parameters, ApplicationFactory::getInstance()->getMediaWikiLogger() );
}
private function modifyHttpHeader( $header, $message = '' ) {
if ( !$this->allowedToModifyHttpHeader ) {
return null;
}
ignore_user_abort( true );
header( $header );
print $message;
ob_flush();
flush();
// @see SpecialRunJobs
// MW 1.27 / https://phabricator.wikimedia.org/T115413
// Once the client receives this response, it can disconnect
set_error_handler( function ( $errno, $errstr ) {
if ( strpos( $errstr, 'Cannot modify header information' ) !== false ) {
return true; // bug T115413
}
// Delegate unhandled errors to the default handlers
return false;
} );
}
private function doRunJob( $parameters, $logger ) {
$type = $parameters['async-job']['type'];
$title = Title::newFromDBkey( $parameters['async-job']['title'] );
if ( $title === null ) {
return $logger->info( __METHOD__ . " invalid title" );
}
$logger->info( __METHOD__ . ' ' . $type . ' :: ' . $title->getPrefixedDBkey() . '#' . $title->getNamespace() );
$job = ApplicationFactory::getInstance()->newJobFactory()->newByType(
$type,
$title,
$parameters
);
$job->run();
return true;
}
// 1.19 doesn't have a getMethod
private function isHttpRequestMethod( $key ) {
if ( method_exists( $this->getRequest(), 'getMethod') ) {
return $this->getRequest()->getMethod() == $key;
}
return isset( $_SERVER['REQUEST_METHOD'] ) ? $_SERVER['REQUEST_METHOD'] == $key : false;
}
}
|
