1 files changed, 121 insertions, 0 deletions
diff --git a/www/wiki/includes/specials/SpecialRunJobs.php b/www/wiki/includes/specials/SpecialRunJobs.php
new file mode 100644
index 00000000..375694be
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+++ b/www/wiki/includes/specials/SpecialRunJobs.php
@@ -0,0 +1,121 @@
+<?php
+/**
+ * Implements Special:RunJobs
+ *
+ * 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
+ * @ingroup SpecialPage
+ */
+
+use MediaWiki\Logger\LoggerFactory;
+
+/**
+ * Special page designed for running background tasks (internal use only)
+ *
+ * @ingroup SpecialPage
+ */
+class SpecialRunJobs extends UnlistedSpecialPage {
+	public function __construct() {
+		parent::__construct( 'RunJobs' );
+	}
+
+	public function doesWrites() {
+		return true;
+	}
+
+	public function execute( $par = '' ) {
+		$this->getOutput()->disable();
+
+		if ( wfReadOnly() ) {
+			wfHttpError( 423, 'Locked', 'Wiki is in read-only mode.' );
+			return;
+		}
+
+		// Validate request method
+		if ( !$this->getRequest()->wasPosted() ) {
+			wfHttpError( 400, 'Bad Request', 'Request must be POSTed.' );
+			return;
+		}
+
+		// Validate request parameters
+		$optional = [ 'maxjobs' => 0, 'maxtime' => 30, 'type' => false, 'async' => true ];
+		$required = array_flip( [ 'title', 'tasks', 'signature', 'sigexpiry' ] );
+		$params = array_intersect_key( $this->getRequest()->getValues(), $required + $optional );
+		$missing = array_diff_key( $required, $params );
+		if ( count( $missing ) ) {
+			wfHttpError( 400, 'Bad Request',
+				'Missing parameters: ' . implode( ', ', array_keys( $missing ) )
+			);
+			return;
+		}
+
+		// Validate request signature
+		$squery = $params;
+		unset( $squery['signature'] );
+		$correctSignature = self::getQuerySignature( $squery, $this->getConfig()->get( 'SecretKey' ) );
+		$providedSignature = $params['signature'];
+		$verified = is_string( $providedSignature )
+			&& hash_equals( $correctSignature, $providedSignature );
+		if ( !$verified || $params['sigexpiry'] < time() ) {
+			wfHttpError( 400, 'Bad Request', 'Invalid or stale signature provided.' );
+			return;
+		}
+
+		// Apply any default parameter values
+		$params += $optional;
+
+		if ( $params['async'] ) {
+			// HTTP 202 Accepted
+			HttpStatus::header( 202 );
+			// Clients are meant to disconnect without waiting for the full response.
+			// Let the page output happen before the jobs start, so that clients know it's
+			// safe to disconnect. MediaWiki::preOutputCommit() calls ignore_user_abort()
+			// or similar to make sure we stay alive to run the deferred update.
+			DeferredUpdates::addUpdate(
+				new TransactionRoundDefiningUpdate(
+					function () use ( $params ) {
+						$this->doRun( $params );
+					},
+					__METHOD__
+				),
+				DeferredUpdates::POSTSEND
+			);
+		} else {
+			$this->doRun( $params );
+			print "Done\n";
+		}
+	}
+
+	protected function doRun( array $params ) {
+		$runner = new JobRunner( LoggerFactory::getInstance( 'runJobs' ) );
+		$runner->run( [
+			'type'     => $params['type'],
+			'maxJobs'  => $params['maxjobs'] ?: 1,
+			'maxTime'  => $params['maxtime'] ?: 30
+		] );
+	}
+
+	/**
+	 * @param array $query
+	 * @param string $secretKey
+	 * @return string
+	 */
+	public static function getQuerySignature( array $query, $secretKey ) {
+		ksort( $query ); // stable order
+		return hash_hmac( 'sha1', wfArrayToCgi( $query ), $secretKey );
+	}
+}